1 /* read.c - read a source file -
2 Copyright (C) 1986-2017 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 GAS is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to the Free
18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
21 /* If your chars aren't 8 bits, you will change this a bit (eg. to 0xFF).
22 But then, GNU isn't supposed to run on your machine anyway.
23 (RMS is so shortsighted sometimes.) */
24 #define MASK_CHAR ((int)(unsigned char) -1)
26 /* This is the largest known floating point format (for now). It will
27 grow when we do 4361 style flonums. */
28 #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
30 /* Routines that read assembler source text to build spaghetti in memory.
31 Another group of these functions is in the expr.c module. */
34 #include "safe-ctype.h"
40 #include "dw2gencfi.h"
43 #ifndef TC_START_LABEL
44 #define TC_START_LABEL(STR, NUL_CHAR, NEXT_CHAR) (NEXT_CHAR == ':')
47 /* Set by the object-format or the target. */
48 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
49 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
54 else if ((SIZE) >= 4) \
56 else if ((SIZE) >= 2) \
64 char *input_line_pointer; /*->next char of source file to parse. */
66 #if BITS_PER_CHAR != 8
67 /* The following table is indexed by[(char)] and will break if
68 a char does not have exactly 256 states (hopefully 0:255!)! */
77 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
82 /* The Delta 68k assembler permits % inside label names. */
87 /* The PowerPC Windows NT assemblers permits ? inside label names. */
92 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
93 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
102 /* The Delta 68k assembler permits ~ at start of label names. */
106 /* Used by is_... macros. our ctype[]. */
107 char lex_type[256] = {
108 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
110 0, 0, 0, LEX_HASH, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
111 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
112 LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
113 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
114 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
115 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */
116 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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
127 Out: 1 if this character ends a line.
128 2 if this character is a line separator. */
129 char is_end_of_line[256] = {
131 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
133 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
135 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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, /* 0123456789:;<=>? */
138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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, /* */
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 /* */
152 #ifndef TC_CASE_SENSITIVE
153 char original_case_string[128];
156 /* Functions private to this file. */
158 static char *buffer; /* 1st char of each buffer of lines is here. */
159 static char *buffer_limit; /*->1 + last char in buffer. */
161 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
162 in the tc-<CPU>.h file. See the "Porting GAS" section of the
164 int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
166 /* Variables for handling include file directory table. */
168 /* Table of pointers to directories to search for .include's. */
169 const char **include_dirs;
171 /* How many are in the table. */
172 int include_dir_count;
174 /* Length of longest in table. */
175 int include_dir_maxlen = 1;
177 #ifndef WORKING_DOT_WORD
178 struct broken_word *broken_words;
179 int new_broken_words;
182 /* The current offset into the absolute section. We don't try to
183 build frags in the absolute section, since no data can be stored
184 there. We just keep track of the current offset. */
185 addressT abs_section_offset;
187 /* If this line had an MRI style label, it is stored in this variable.
188 This is used by some of the MRI pseudo-ops. */
191 /* This global variable is used to support MRI common sections. We
192 translate such sections into a common symbol. This variable is
193 non-NULL when we are in an MRI common section. */
194 symbolS *mri_common_symbol;
196 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
197 need to align to an even byte boundary unless the next pseudo-op is
198 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
200 static int mri_pending_align;
204 /* This variable is set to be non-zero if the next string we see might
205 be the name of the source file in DWARF debugging information. See
206 the comment in emit_expr for the format we look for. */
207 static int dwarf_file_string;
211 /* If the target defines the md_frag_max_var hook then we know
212 enough to implement the .bundle_align_mode features. */
213 #ifdef md_frag_max_var
214 # define HANDLE_BUNDLE
218 /* .bundle_align_mode sets this. Normally it's zero. When nonzero,
219 it's the exponent of the bundle size, and aligned instruction bundle
220 mode is in effect. */
221 static unsigned int bundle_align_p2;
223 /* These are set by .bundle_lock and .bundle_unlock. .bundle_lock sets
224 bundle_lock_frag to frag_now and then starts a new frag with
225 frag_align_code. At the same time, bundle_lock_frain gets frchain_now,
226 so that .bundle_unlock can verify that we didn't change segments.
227 .bundle_unlock resets both to NULL. If we detect a bundling violation,
228 then we reset bundle_lock_frchain to NULL as an indicator that we've
229 already diagnosed the error with as_bad and don't need a cascade of
230 redundant errors, but bundle_lock_frag remains set to indicate that
231 we are expecting to see .bundle_unlock. */
232 static fragS *bundle_lock_frag;
233 static frchainS *bundle_lock_frchain;
235 /* This is incremented by .bundle_lock and decremented by .bundle_unlock,
237 static unsigned int bundle_lock_depth;
240 static void do_s_func (int end_p, const char *default_prefix);
241 static void s_align (int, int);
242 static void s_altmacro (int);
243 static void s_bad_end (int);
244 static void s_reloc (int);
245 static int hex_float (int, char *);
246 static segT get_known_segmented_expression (expressionS * expP);
247 static void pobegin (void);
248 static size_t get_non_macro_line_sb (sb *);
249 static void generate_file_debug (void);
250 static char *_find_end_of_line (char *, int, int, int);
258 obj_read_begin_hook ();
260 /* Something close -- but not too close -- to a multiple of 1024.
261 The debugging malloc I'm using has 24 bytes of overhead. */
262 obstack_begin (¬es, chunksize);
263 obstack_begin (&cond_obstack, chunksize);
265 #ifndef tc_line_separator_chars
266 #define tc_line_separator_chars line_separator_chars
268 /* Use machine dependent syntax. */
269 for (p = tc_line_separator_chars; *p; p++)
270 is_end_of_line[(unsigned char) *p] = 2;
271 /* Use more. FIXME-SOMEDAY. */
277 #ifndef TC_ADDRESS_BYTES
278 #define TC_ADDRESS_BYTES address_bytes
283 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
284 contain an address. */
285 int n = (stdoutput->arch_info->bits_per_address - 1) / 8;
293 /* Set up pseudo-op tables. */
295 static struct hash_control *po_hash;
297 static const pseudo_typeS potable[] = {
298 {"abort", s_abort, 0},
299 {"align", s_align_ptwo, 0},
300 {"altmacro", s_altmacro, 1},
301 {"ascii", stringer, 8+0},
302 {"asciz", stringer, 8+1},
303 {"balign", s_align_bytes, 0},
304 {"balignw", s_align_bytes, -2},
305 {"balignl", s_align_bytes, -4},
308 {"bundle_align_mode", s_bundle_align_mode, 0},
309 {"bundle_lock", s_bundle_lock, 0},
310 {"bundle_unlock", s_bundle_unlock, 0},
314 {"common", s_mri_common, 0},
315 {"common.s", s_mri_common, 1},
318 #ifdef TC_ADDRESS_BYTES
322 {"dc.d", float_cons, 'd'},
324 {"dc.s", float_cons, 'f'},
326 {"dc.x", float_cons, 'x'},
328 {"dcb.b", s_space, 1},
329 {"dcb.d", s_float_space, 'd'},
330 {"dcb.l", s_space, 4},
331 {"dcb.s", s_float_space, 'f'},
332 {"dcb.w", s_space, 2},
333 {"dcb.x", s_float_space, 'x'},
335 {"ds.b", s_space, 1},
336 {"ds.d", s_space, 8},
337 {"ds.l", s_space, 4},
338 {"ds.p", s_space, 12},
339 {"ds.s", s_space, 4},
340 {"ds.w", s_space, 2},
341 {"ds.x", s_space, 12},
342 {"debug", s_ignore, 0},
347 {"double", float_cons, 'd'},
349 {"eject", listing_eject, 0}, /* Formfeed listing. */
351 {"elsec", s_else, 0},
352 {"elseif", s_elseif, (int) O_ne},
354 {"endc", s_endif, 0},
355 {"endfunc", s_func, 1},
356 {"endif", s_endif, 0},
357 {"endm", s_bad_end, 0},
358 {"endr", s_bad_end, 1},
364 {"error", s_errwarn, 1},
365 {"exitm", s_mexit, 0},
367 {"extern", s_ignore, 0}, /* We treat all undef as ext. */
368 {"appfile", s_app_file, 1},
369 {"appline", s_app_line, 1},
371 {"file", s_app_file, 0},
373 {"float", float_cons, 'f'},
374 {"format", s_ignore, 0},
376 {"global", s_globl, 0},
377 {"globl", s_globl, 0},
379 {"if", s_if, (int) O_ne},
382 {"ifdef", s_ifdef, 0},
383 {"ifeq", s_if, (int) O_eq},
384 {"ifeqs", s_ifeqs, 0},
385 {"ifge", s_if, (int) O_ge},
386 {"ifgt", s_if, (int) O_gt},
387 {"ifle", s_if, (int) O_le},
388 {"iflt", s_if, (int) O_lt},
391 {"ifndef", s_ifdef, 1},
392 {"ifne", s_if, (int) O_ne},
393 {"ifnes", s_ifeqs, 1},
394 {"ifnotdef", s_ifdef, 1},
395 {"incbin", s_incbin, 0},
396 {"include", s_include, 0},
402 {"lcomm", s_lcomm, 0},
403 {"lflags", s_ignore, 0}, /* Listing flags. */
404 {"linefile", s_app_line, 0},
405 {"linkonce", s_linkonce, 0},
406 {"list", listing_list, 1}, /* Turn listing on. */
407 {"llen", listing_psize, 1},
410 {"macro", s_macro, 0},
411 {"mexit", s_mexit, 0},
413 {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
414 {"name", s_ignore, 0},
415 {"noaltmacro", s_altmacro, 0},
416 {"noformat", s_ignore, 0},
417 {"nolist", listing_list, 0}, /* Turn listing off. */
418 {"nopage", listing_nopage, 0},
420 {"offset", s_struct, 0},
422 {"p2align", s_align_ptwo, 0},
423 {"p2alignw", s_align_ptwo, -2},
424 {"p2alignl", s_align_ptwo, -4},
425 {"page", listing_eject, 0},
426 {"plen", listing_psize, 0},
427 {"print", s_print, 0},
428 {"psize", listing_psize, 0}, /* Set paper size. */
429 {"purgem", s_purgem, 0},
431 {"reloc", s_reloc, 0},
435 {"sbttl", listing_title, 1}, /* Subtitle of listing. */
440 {"single", float_cons, 'f'},
442 {"space", s_space, 0},
443 {"skip", s_space, 0},
444 {"sleb128", s_leb128, 1},
445 {"spc", s_ignore, 0},
446 {"stabd", s_stab, 'd'},
447 {"stabn", s_stab, 'n'},
448 {"stabs", s_stab, 's'},
449 {"string", stringer, 8+1},
450 {"string8", stringer, 8+1},
451 {"string16", stringer, 16+1},
452 {"string32", stringer, 32+1},
453 {"string64", stringer, 64+1},
454 {"struct", s_struct, 0},
458 /* This is for gcc to use. It's only just been added (2/94), so gcc
459 won't be able to use it for a while -- probably a year or more.
460 But once this has been released, check with gcc maintainers
461 before deleting it or even changing the spelling. */
462 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
463 /* If we're folding case -- done for some targets, not necessarily
464 all -- the above string in an input file will be converted to
465 this one. Match it either way... */
466 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
468 {"title", listing_title, 0}, /* Listing title. */
469 {"ttl", listing_title, 0},
471 {"uleb128", s_leb128, 0},
475 {"xdef", s_globl, 0},
476 {"xref", s_ignore, 0},
477 {"xstabs", s_xstab, 's'},
478 {"warning", s_errwarn, 0},
479 {"weakref", s_weakref, 0},
481 {"zero", s_space, 0},
482 {NULL, NULL, 0} /* End sentinel. */
486 get_absolute_expr (expressionS *exp)
488 expression_and_evaluate (exp);
490 if (exp->X_op != O_constant)
492 if (exp->X_op != O_absent)
493 as_bad (_("bad or irreducible absolute expression"));
494 exp->X_add_number = 0;
496 return exp->X_add_number;
500 get_absolute_expression (void)
504 return get_absolute_expr (&exp);
507 static int pop_override_ok = 0;
508 static const char *pop_table_name;
511 pop_insert (const pseudo_typeS *table)
514 const pseudo_typeS *pop;
515 for (pop = table; pop->poc_name; pop++)
517 errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
518 if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
519 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name,
524 #ifndef md_pop_insert
525 #define md_pop_insert() pop_insert(md_pseudo_table)
528 #ifndef obj_pop_insert
529 #define obj_pop_insert() pop_insert(obj_pseudo_table)
532 #ifndef cfi_pop_insert
533 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
539 po_hash = hash_new ();
541 /* Do the target-specific pseudo ops. */
542 pop_table_name = "md";
545 /* Now object specific. Skip any that were in the target table. */
546 pop_table_name = "obj";
550 /* Now portable ones. Skip any that we've seen already. */
551 pop_table_name = "standard";
552 pop_insert (potable);
555 pop_table_name = "cfi";
560 #define HANDLE_CONDITIONAL_ASSEMBLY(num_read) \
561 if (ignore_input ()) \
563 char *eol = find_end_of_line (input_line_pointer - (num_read), \
565 input_line_pointer = (input_line_pointer <= buffer_limit \
566 && eol >= buffer_limit) \
572 /* This function is used when scrubbing the characters between #APP
575 static char *scrub_string;
576 static char *scrub_string_end;
579 scrub_from_string (char *buf, size_t buflen)
583 copy = scrub_string_end - scrub_string;
586 memcpy (buf, scrub_string, copy);
587 scrub_string += copy;
591 /* Helper function of read_a_source_file, which tries to expand a macro. */
593 try_macro (char term, const char *line)
599 if (check_macro (line, &out, &err, ¯o))
603 *input_line_pointer++ = term;
604 input_scrub_include_sb (&out,
605 input_line_pointer, 1);
608 input_scrub_next_buffer (&input_line_pointer);
610 md_macro_info (macro);
618 /* Start a new instruction bundle. Returns the rs_align_code frag that
619 will be used to align the new bundle. */
623 fragS *frag = frag_now;
625 frag_align_code (0, 0);
627 while (frag->fr_type != rs_align_code)
628 frag = frag->fr_next;
630 gas_assert (frag != frag_now);
635 /* Calculate the maximum size after relaxation of the region starting
636 at the given frag and extending through frag_now (which is unfinished). */
638 pending_bundle_size (fragS *frag)
640 unsigned int offset = frag->fr_fix;
641 unsigned int size = 0;
643 gas_assert (frag != frag_now);
644 gas_assert (frag->fr_type == rs_align_code);
646 while (frag != frag_now)
648 /* This should only happen in what will later become an error case. */
652 size += frag->fr_fix;
653 if (frag->fr_type == rs_machine_dependent)
654 size += md_frag_max_var (frag);
656 frag = frag->fr_next;
659 gas_assert (frag == frag_now);
660 size += frag_now_fix ();
661 if (frag->fr_type == rs_machine_dependent)
662 size += md_frag_max_var (frag);
664 gas_assert (size >= offset);
666 return size - offset;
669 /* Finish off the frag created to ensure bundle alignment. */
671 finish_bundle (fragS *frag, unsigned int size)
673 gas_assert (bundle_align_p2 > 0);
674 gas_assert (frag->fr_type == rs_align_code);
678 /* If there is more than a single byte, then we need to set up the
679 alignment frag. Otherwise we leave it at its initial state from
680 calling frag_align_code (0, 0), so that it does nothing. */
681 frag->fr_offset = bundle_align_p2;
682 frag->fr_subtype = size - 1;
685 /* We do this every time rather than just in s_bundle_align_mode
686 so that we catch any affected section without needing hooks all
687 over for all paths that do section changes. It's cheap enough. */
688 if (bundle_align_p2 > OCTETS_PER_BYTE_POWER)
689 record_alignment (now_seg, bundle_align_p2 - OCTETS_PER_BYTE_POWER);
692 /* Assemble one instruction. This takes care of the bundle features
693 around calling md_assemble. */
695 assemble_one (char *line)
697 fragS *insn_start_frag = NULL;
699 if (bundle_lock_frchain != NULL && bundle_lock_frchain != frchain_now)
701 as_bad (_("cannot change section or subsection inside .bundle_lock"));
702 /* Clearing this serves as a marker that we have already complained. */
703 bundle_lock_frchain = NULL;
706 if (bundle_lock_frchain == NULL && bundle_align_p2 > 0)
707 insn_start_frag = start_bundle ();
711 if (bundle_lock_frchain != NULL)
713 /* Make sure this hasn't pushed the locked sequence
714 past the bundle size. */
715 unsigned int bundle_size = pending_bundle_size (bundle_lock_frag);
716 if (bundle_size > (1U << bundle_align_p2))
718 .bundle_lock sequence at %u bytes but .bundle_align_mode limit is %u bytes"),
719 bundle_size, 1U << bundle_align_p2);
721 else if (bundle_align_p2 > 0)
723 unsigned int insn_size = pending_bundle_size (insn_start_frag);
725 if (insn_size > (1U << bundle_align_p2))
727 single instruction is %u bytes long but .bundle_align_mode limit is %u"),
728 (unsigned int) insn_size, 1U << bundle_align_p2);
730 finish_bundle (insn_start_frag, insn_size);
734 #else /* !HANDLE_BUNDLE */
736 # define assemble_one(line) md_assemble(line)
738 #endif /* HANDLE_BUNDLE */
743 flagword flags = bfd_get_section_flags (stdoutput, now_seg);
745 return (flags & SEC_ALLOC) && !(flags & (SEC_LOAD | SEC_HAS_CONTENTS));
748 /* Guts of .align directive:
749 N is the power of two to which to align. A value of zero is accepted but
750 ignored: the default alignment of the section will be at least this.
751 FILL may be NULL, or it may point to the bytes of the fill pattern.
752 LEN is the length of whatever FILL points to, if anything. If LEN is zero
753 but FILL is not NULL then LEN is treated as if it were one.
754 MAX is the maximum number of characters to skip when doing the alignment,
755 or 0 if there is no maximum. */
758 do_align (unsigned int n, char *fill, unsigned int len, unsigned int max)
760 if (now_seg == absolute_section || in_bss ())
766 if (now_seg == absolute_section)
767 as_warn (_("ignoring fill value in absolute section"));
769 as_warn (_("ignoring fill value in section `%s'"),
770 segment_name (now_seg));
777 #ifdef md_flush_pending_output
778 md_flush_pending_output ();
782 md_do_align (n, fill, len, max, just_record_alignment);
785 /* Only make a frag if we HAVE to... */
786 if ((n > OCTETS_PER_BYTE_POWER) && !need_pass_2)
790 if (subseg_text_p (now_seg))
791 frag_align_code (n, max);
793 frag_align (n, 0, max);
796 frag_align (n, *fill, max);
798 frag_align_pattern (n, fill, len, max);
802 just_record_alignment: ATTRIBUTE_UNUSED_LABEL
805 if (n > OCTETS_PER_BYTE_POWER)
806 record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
809 /* We read the file, putting things into a web that represents what we
810 have been reading. */
812 read_a_source_file (const char *name)
816 char *s; /* String of symbol, '\0' appended. */
824 buffer = input_scrub_new_file (name);
827 listing_newline (NULL);
828 register_dependency (name);
830 /* Generate debugging information before we've read anything in to denote
831 this file as the "main" source file and not a subordinate one
832 (e.g. N_SO vs N_SOL in stabs). */
833 generate_file_debug ();
835 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
836 { /* We have another line to parse. */
838 /* In order to avoid listing macro expansion lines with labels
839 multiple times, keep track of which line was last issued. */
840 static char *last_eol;
844 while (input_line_pointer < buffer_limit)
846 bfd_boolean was_new_line;
847 /* We have more of this buffer to parse. */
849 /* We now have input_line_pointer->1st char of next line.
850 If input_line_pointer [-1] == '\n' then we just
851 scanned another line: so bump line counters. */
852 was_new_line = is_end_of_line[(unsigned char) input_line_pointer[-1]];
855 symbol_set_value_now (&dot_symbol);
856 #ifdef md_start_line_hook
857 md_start_line_hook ();
859 if (input_line_pointer[-1] == '\n')
860 bump_line_counters ();
864 /* If listing is on, and we are expanding a macro, then give
865 the listing code the contents of the expanded line. */
868 if ((listing & LISTING_MACEXP) && macro_nest > 0)
870 /* Find the end of the current expanded macro line. */
871 s = find_end_of_line (input_line_pointer, flag_m68k_mri);
879 /* Copy it for safe keeping. Also give an indication of
880 how much macro nesting is involved at this point. */
881 len = s - input_line_pointer;
882 copy = XNEWVEC (char, len + macro_nest + 2);
883 memset (copy, '>', macro_nest);
884 copy[macro_nest] = ' ';
885 memcpy (copy + macro_nest + 1, input_line_pointer, len);
886 copy[macro_nest + 1 + len] = '\0';
888 /* Install the line with the listing facility. */
889 listing_newline (copy);
893 listing_newline (NULL);
900 if (LABELS_WITHOUT_COLONS || flag_m68k_mri)
902 next_char = * input_line_pointer;
903 /* Text at the start of a line must be a label, we
904 run down and stick a colon in. */
905 if (is_name_beginner (next_char) || next_char == '"')
910 HANDLE_CONDITIONAL_ASSEMBLY (0);
912 nul_char = get_symbol_name (& line_start);
913 next_char = (nul_char == '"' ? input_line_pointer[1] : nul_char);
915 /* In MRI mode, the EQU and MACRO pseudoops must
916 be handled specially. */
920 char *rest = input_line_pointer + 1;
924 if (*rest == ' ' || *rest == '\t')
926 if ((strncasecmp (rest, "EQU", 3) == 0
927 || strncasecmp (rest, "SET", 3) == 0)
928 && (rest[3] == ' ' || rest[3] == '\t'))
930 input_line_pointer = rest + 3;
932 strncasecmp (rest, "SET", 3) == 0);
935 if (strncasecmp (rest, "MACRO", 5) == 0
938 || is_end_of_line[(unsigned char) rest[5]]))
942 /* In MRI mode, we need to handle the MACRO
943 pseudo-op specially: we don't want to put the
944 symbol in the symbol table. */
946 #ifdef TC_START_LABEL_WITHOUT_COLON
947 && TC_START_LABEL_WITHOUT_COLON (nul_char, next_char)
950 line_label = colon (line_start);
952 line_label = symbol_create (line_start,
957 next_char = restore_line_pointer (nul_char);
958 if (next_char == ':')
959 input_line_pointer++;
964 /* We are at the beginning of a line, or similar place.
965 We expect a well-formed assembler statement.
966 A "symbol-name:" is a statement.
968 Depending on what compiler is used, the order of these tests
969 may vary to catch most common case 1st.
970 Each test is independent of all other tests at the (top)
973 nul_char = next_char = *input_line_pointer++;
974 while (next_char == '\t' || next_char == ' ' || next_char == '\f');
976 /* C is the 1st significant character.
977 Input_line_pointer points after that character. */
978 if (is_name_beginner (next_char) || next_char == '"')
982 /* Want user-defined label or pseudo/opcode. */
983 HANDLE_CONDITIONAL_ASSEMBLY (1);
985 --input_line_pointer;
986 nul_char = get_symbol_name (& s); /* name's delimiter. */
987 next_char = (nul_char == '"' ? input_line_pointer[1] : nul_char);
988 rest = input_line_pointer + (nul_char == '"' ? 2 : 1);
990 /* NEXT_CHAR is character after symbol.
991 The end of symbol in the input line is now '\0'.
992 S points to the beginning of the symbol.
993 [In case of pseudo-op, s->'.'.]
994 Input_line_pointer->'\0' where NUL_CHAR was. */
995 if (TC_START_LABEL (s, nul_char, next_char))
999 /* In MRI mode, \tsym: set 0 is permitted. */
1003 if (*rest == ' ' || *rest == '\t')
1006 if ((strncasecmp (rest, "EQU", 3) == 0
1007 || strncasecmp (rest, "SET", 3) == 0)
1008 && (rest[3] == ' ' || rest[3] == '\t'))
1010 input_line_pointer = rest + 3;
1016 line_label = colon (s); /* User-defined label. */
1017 restore_line_pointer (nul_char);
1018 ++ input_line_pointer;
1019 #ifdef tc_check_label
1020 tc_check_label (line_label);
1022 /* Input_line_pointer->after ':'. */
1025 else if ((next_char == '=' && *rest == '=')
1026 || ((next_char == ' ' || next_char == '\t')
1031 demand_empty_rest_of_line ();
1033 else if ((next_char == '='
1034 || ((next_char == ' ' || next_char == '\t')
1036 #ifdef TC_EQUAL_IN_INSN
1037 && !TC_EQUAL_IN_INSN (next_char, s)
1042 demand_empty_rest_of_line ();
1046 /* Expect pseudo-op or machine instruction. */
1049 #ifndef TC_CASE_SENSITIVE
1053 strncpy (original_case_string, s2, sizeof (original_case_string));
1054 original_case_string[sizeof (original_case_string) - 1] = 0;
1058 *s2 = TOLOWER (*s2);
1063 if (NO_PSEUDO_DOT || flag_m68k_mri)
1065 /* The MRI assembler uses pseudo-ops without
1067 pop = (pseudo_typeS *) hash_find (po_hash, s);
1068 if (pop != NULL && pop->poc_handler == NULL)
1073 || (!flag_m68k_mri && *s == '.'))
1077 WARNING: next_char may be end-of-line.
1078 We lookup the pseudo-op table with s+1 because we
1079 already know that the pseudo-op begins with a '.'. */
1082 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
1083 if (pop && !pop->poc_handler)
1086 /* In MRI mode, we may need to insert an
1087 automatic alignment directive. What a hack
1089 if (mri_pending_align
1091 || !((pop->poc_handler == cons
1092 && pop->poc_val == 1)
1093 || (pop->poc_handler == s_space
1094 && pop->poc_val == 1)
1095 #ifdef tc_conditional_pseudoop
1096 || tc_conditional_pseudoop (pop)
1098 || pop->poc_handler == s_if
1099 || pop->poc_handler == s_ifdef
1100 || pop->poc_handler == s_ifc
1101 || pop->poc_handler == s_ifeqs
1102 || pop->poc_handler == s_else
1103 || pop->poc_handler == s_endif
1104 || pop->poc_handler == s_globl
1105 || pop->poc_handler == s_ignore)))
1107 do_align (1, (char *) NULL, 0, 0);
1108 mri_pending_align = 0;
1110 if (line_label != NULL)
1112 symbol_set_frag (line_label, frag_now);
1113 S_SET_VALUE (line_label, frag_now_fix ());
1117 /* Print the error msg now, while we still can. */
1120 char *end = input_line_pointer;
1122 (void) restore_line_pointer (nul_char);
1124 nul_char = next_char = *--input_line_pointer;
1125 *input_line_pointer = '\0';
1126 if (! macro_defined || ! try_macro (next_char, s))
1129 as_bad (_("unknown pseudo-op: `%s'"), s);
1130 *input_line_pointer++ = nul_char;
1135 /* Put it back for error messages etc. */
1136 next_char = restore_line_pointer (nul_char);
1137 /* The following skip of whitespace is compulsory.
1138 A well shaped space is sometimes all that separates
1139 keyword from operands. */
1140 if (next_char == ' ' || next_char == '\t')
1141 input_line_pointer++;
1143 /* Input_line is restored.
1144 Input_line_pointer->1st non-blank char
1145 after pseudo-operation. */
1146 (*pop->poc_handler) (pop->poc_val);
1148 /* If that was .end, just get out now. */
1149 if (pop->poc_handler == s_end)
1154 /* WARNING: next_char may be end-of-line. */
1155 /* Also: input_line_pointer->`\0` where nul_char was. */
1156 (void) restore_line_pointer (nul_char);
1157 input_line_pointer = _find_end_of_line (input_line_pointer, flag_m68k_mri, 1, 0);
1158 next_char = nul_char = *input_line_pointer;
1159 *input_line_pointer = '\0';
1161 generate_lineno_debug ();
1163 if (macro_defined && try_macro (next_char, s))
1166 if (mri_pending_align)
1168 do_align (1, (char *) NULL, 0, 0);
1169 mri_pending_align = 0;
1170 if (line_label != NULL)
1172 symbol_set_frag (line_label, frag_now);
1173 S_SET_VALUE (line_label, frag_now_fix ());
1177 assemble_one (s); /* Assemble 1 instruction. */
1179 /* PR 19630: The backend may have set ilp to NULL
1180 if it encountered a catastrophic failure. */
1181 if (input_line_pointer == NULL)
1182 as_fatal (_("unable to continue with assembly."));
1184 *input_line_pointer++ = nul_char;
1186 /* We resume loop AFTER the end-of-line from
1187 this instruction. */
1193 /* Empty statement? */
1194 if (is_end_of_line[(unsigned char) next_char])
1197 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) && ISDIGIT (next_char))
1199 /* local label ("4:") */
1200 char *backup = input_line_pointer;
1202 HANDLE_CONDITIONAL_ASSEMBLY (1);
1204 temp = next_char - '0';
1206 if (nul_char == '"')
1207 ++ input_line_pointer;
1209 /* Read the whole number. */
1210 while (ISDIGIT (*input_line_pointer))
1212 temp = (temp * 10) + *input_line_pointer - '0';
1213 ++input_line_pointer;
1216 if (LOCAL_LABELS_DOLLAR
1217 && *input_line_pointer == '$'
1218 && *(input_line_pointer + 1) == ':')
1220 input_line_pointer += 2;
1222 if (dollar_label_defined (temp))
1224 as_fatal (_("label \"%d$\" redefined"), temp);
1227 define_dollar_label (temp);
1228 colon (dollar_label_name (temp, 0));
1233 && *input_line_pointer++ == ':')
1235 fb_label_instance_inc (temp);
1236 colon (fb_label_name (temp, 0));
1240 input_line_pointer = backup;
1243 if (next_char && strchr (line_comment_chars, next_char))
1244 { /* Its a comment. Better say APP or NO_APP. */
1249 unsigned int new_length;
1252 s = input_line_pointer;
1253 if (strncmp (s, "APP\n", 4))
1256 ignore_rest_of_line ();
1259 bump_line_counters ();
1262 ends = strstr (s, "#NO_APP\n");
1266 unsigned int tmp_len;
1269 /* The end of the #APP wasn't in this buffer. We
1270 keep reading in buffers until we find the #NO_APP
1271 that goes with this #APP There is one. The specs
1273 tmp_len = buffer_limit - s;
1274 tmp_buf = XNEWVEC (char, tmp_len + 1);
1275 memcpy (tmp_buf, s, tmp_len);
1278 new_tmp = input_scrub_next_buffer (&buffer);
1282 buffer_limit = new_tmp;
1283 input_line_pointer = buffer;
1284 ends = strstr (buffer, "#NO_APP\n");
1286 num = ends - buffer;
1288 num = buffer_limit - buffer;
1290 tmp_buf = XRESIZEVEC (char, tmp_buf, tmp_len + num);
1291 memcpy (tmp_buf + tmp_len, buffer, num);
1296 input_line_pointer = ends ? ends + 8 : NULL;
1304 input_line_pointer = ends + 8;
1308 scrub_string_end = ends;
1310 new_length = ends - s;
1311 new_buf = XNEWVEC (char, new_length);
1318 space = (new_buf + new_length) - new_tmp;
1319 size = do_scrub_chars (scrub_from_string, new_tmp, space);
1327 new_buf = XRESIZEVEC (char, new_buf, new_length + 100);
1328 new_tmp = new_buf + new_length;
1335 /* We've "scrubbed" input to the preferred format. In the
1336 process we may have consumed the whole of the remaining
1337 file (and included files). We handle this formatted
1338 input similar to that of macro expansion, letting
1339 actual macro expansion (possibly nested) and other
1340 input expansion work. Beware that in messages, line
1341 numbers and possibly file names will be incorrect. */
1342 new_length = strlen (new_buf);
1343 sb_build (&sbuf, new_length);
1344 sb_add_buffer (&sbuf, new_buf, new_length);
1345 input_scrub_include_sb (&sbuf, input_line_pointer, 0);
1347 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1352 HANDLE_CONDITIONAL_ASSEMBLY (1);
1354 #ifdef tc_unrecognized_line
1355 if (tc_unrecognized_line (next_char))
1358 input_line_pointer--;
1359 /* Report unknown char as error. */
1360 demand_empty_rest_of_line ();
1365 symbol_set_value_now (&dot_symbol);
1367 #ifdef HANDLE_BUNDLE
1368 if (bundle_lock_frag != NULL)
1370 as_bad_where (bundle_lock_frag->fr_file, bundle_lock_frag->fr_line,
1371 _(".bundle_lock with no matching .bundle_unlock"));
1372 bundle_lock_frag = NULL;
1373 bundle_lock_frchain = NULL;
1374 bundle_lock_depth = 0;
1381 /* Close the input file. */
1382 input_scrub_close ();
1383 #ifdef WARN_COMMENTS
1385 if (warn_comment && found_comment)
1386 as_warn_where (found_comment_file, found_comment,
1387 "first comment found here");
1392 /* Convert O_constant expression EXP into the equivalent O_big representation.
1393 Take the sign of the number from SIGN rather than X_add_number. */
1396 convert_to_bignum (expressionS *exp, int sign)
1401 value = exp->X_add_number;
1402 for (i = 0; i < sizeof (exp->X_add_number) / CHARS_PER_LITTLENUM; i++)
1404 generic_bignum[i] = value & LITTLENUM_MASK;
1405 value >>= LITTLENUM_NUMBER_OF_BITS;
1407 /* Add a sequence of sign bits if the top bit of X_add_number is not
1408 the sign of the original value. */
1409 if ((exp->X_add_number < 0) == !sign)
1410 generic_bignum[i++] = sign ? LITTLENUM_MASK : 0;
1412 exp->X_add_number = i;
1415 /* For most MRI pseudo-ops, the line actually ends at the first
1416 nonquoted space. This function looks for that point, stuffs a null
1417 in, and sets *STOPCP to the character that used to be there, and
1418 returns the location.
1420 Until I hear otherwise, I am going to assume that this is only true
1421 for the m68k MRI assembler. */
1424 mri_comment_field (char *stopcp)
1430 know (flag_m68k_mri);
1432 for (s = input_line_pointer;
1433 ((!is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
1441 for (s = input_line_pointer;
1442 !is_end_of_line[(unsigned char) *s];
1452 /* Skip to the end of an MRI comment field. */
1455 mri_comment_end (char *stop, int stopc)
1459 input_line_pointer = stop;
1461 while (!is_end_of_line[(unsigned char) *input_line_pointer])
1462 ++input_line_pointer;
1466 s_abort (int ignore ATTRIBUTE_UNUSED)
1468 as_fatal (_(".abort detected. Abandoning ship."));
1471 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1472 (in bytes). A negative ARG is the negative of the length of the
1473 fill pattern. BYTES_P is non-zero if the alignment value should be
1474 interpreted as the byte boundary, rather than the power of 2. */
1475 #ifndef TC_ALIGN_LIMIT
1476 #define TC_ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1480 s_align (signed int arg, int bytes_p)
1482 unsigned int align_limit = TC_ALIGN_LIMIT;
1491 stop = mri_comment_field (&stopc);
1493 if (is_end_of_line[(unsigned char) *input_line_pointer])
1498 align = arg; /* Default value from pseudo-op table. */
1502 align = get_absolute_expression ();
1505 #ifdef TC_ALIGN_ZERO_IS_DEFAULT
1506 if (arg > 0 && align == 0)
1513 /* Convert to a power of 2. */
1518 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1521 as_bad (_("alignment not a power of 2"));
1527 if (align > align_limit)
1529 align = align_limit;
1530 as_warn (_("alignment too large: %u assumed"), align);
1533 if (*input_line_pointer != ',')
1540 ++input_line_pointer;
1541 if (*input_line_pointer == ',')
1545 fill = get_absolute_expression ();
1550 if (*input_line_pointer != ',')
1554 ++input_line_pointer;
1555 max = get_absolute_expression ();
1562 as_warn (_("expected fill pattern missing"));
1563 do_align (align, (char *) NULL, 0, max);
1567 unsigned int fill_len;
1579 do_align (align, &fill_char, fill_len, max);
1585 if ((size_t) fill_len > sizeof ab)
1587 as_warn (_("fill pattern too long, truncating to %u"),
1588 (unsigned) sizeof ab);
1589 fill_len = sizeof ab;
1592 md_number_to_chars (ab, fill, fill_len);
1593 do_align (align, ab, fill_len, max);
1597 demand_empty_rest_of_line ();
1600 mri_comment_end (stop, stopc);
1603 /* Handle the .align pseudo-op on machines where ".align 4" means
1604 align to a 4 byte boundary. */
1607 s_align_bytes (int arg)
1612 /* Handle the .align pseudo-op on machines where ".align 4" means align
1613 to a 2**4 boundary. */
1616 s_align_ptwo (int arg)
1621 /* Switch in and out of alternate macro mode. */
1626 demand_empty_rest_of_line ();
1627 macro_set_alternate (on);
1630 /* Read a symbol name from input_line_pointer.
1632 Stores the symbol name in a buffer and returns a pointer to this buffer.
1633 The buffer is xalloc'ed. It is the caller's responsibility to free
1636 The name is not left in the i_l_p buffer as it may need processing
1637 to handle escape characters.
1639 Advances i_l_p to the next non-whitespace character.
1641 If a symbol name could not be read, the routine issues an error
1642 messages, skips to the end of the line and returns NULL. */
1645 read_symbol_name (void)
1651 c = *input_line_pointer++;
1655 #define SYM_NAME_CHUNK_LEN 128
1656 ptrdiff_t len = SYM_NAME_CHUNK_LEN;
1660 start = name = XNEWVEC (char, len + 1);
1662 name_end = name + SYM_NAME_CHUNK_LEN;
1664 while (is_a_char (C = next_char_of_string ()))
1666 if (name >= name_end)
1670 sofar = name - start;
1671 len += SYM_NAME_CHUNK_LEN;
1672 start = XRESIZEVEC (char, start, len + 1);
1673 name_end = start + len;
1674 name = start + sofar;
1681 /* Since quoted symbol names can contain non-ASCII characters,
1682 check the string and warn if it cannot be recognised by the
1683 current character set. */
1684 if (mbstowcs (NULL, name, len) == (size_t) -1)
1685 as_warn (_("symbol name not recognised in the current locale"));
1687 else if (is_name_beginner (c) || c == '\001')
1691 name = input_line_pointer - 1;
1693 /* We accept \001 in a name in case this is
1694 being called with a constructed string. */
1695 while (is_part_of_name (c = *input_line_pointer++)
1699 len = (input_line_pointer - name) - 1;
1700 start = XNEWVEC (char, len + 1);
1702 memcpy (start, name, len);
1705 /* Skip a name ender char if one is present. */
1706 if (! is_name_ender (c))
1707 --input_line_pointer;
1710 name = start = NULL;
1714 as_bad (_("expected symbol name"));
1715 ignore_rest_of_line ();
1726 s_comm_internal (int param,
1727 symbolS *(*comm_parse_extra) (int, symbolS *, addressT))
1731 symbolS *symbolP = NULL;
1737 stop = mri_comment_field (&stopc);
1739 if ((name = read_symbol_name ()) == NULL)
1742 /* Accept an optional comma after the name. The comma used to be
1743 required, but Irix 5 cc does not generate it for .lcomm. */
1744 if (*input_line_pointer == ',')
1745 input_line_pointer++;
1747 temp = get_absolute_expr (&exp);
1749 size &= ((addressT) 2 << (stdoutput->arch_info->bits_per_address - 1)) - 1;
1750 if (exp.X_op == O_absent)
1752 as_bad (_("missing size expression"));
1753 ignore_rest_of_line ();
1756 else if (temp != size || !exp.X_unsigned)
1758 as_warn (_("size (%ld) out of range, ignored"), (long) temp);
1759 ignore_rest_of_line ();
1763 symbolP = symbol_find_or_make (name);
1764 if ((S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
1765 && !S_IS_COMMON (symbolP))
1767 if (!S_IS_VOLATILE (symbolP))
1770 as_bad (_("symbol `%s' is already defined"), name);
1771 ignore_rest_of_line ();
1774 symbolP = symbol_clone (symbolP, 1);
1775 S_SET_SEGMENT (symbolP, undefined_section);
1776 S_SET_VALUE (symbolP, 0);
1777 symbol_set_frag (symbolP, &zero_address_frag);
1778 S_CLEAR_VOLATILE (symbolP);
1781 size = S_GET_VALUE (symbolP);
1784 else if (size != temp)
1785 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1786 name, (long) size, (long) temp);
1788 if (comm_parse_extra != NULL)
1789 symbolP = (*comm_parse_extra) (param, symbolP, size);
1792 S_SET_VALUE (symbolP, (valueT) size);
1793 S_SET_EXTERNAL (symbolP);
1794 S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
1797 demand_empty_rest_of_line ();
1800 mri_comment_end (stop, stopc);
1809 s_comm_internal (ignore, NULL);
1812 /* The MRI COMMON pseudo-op. We handle this by creating a common
1813 symbol with the appropriate name. We make s_space do the right
1814 thing by increasing the size. */
1817 s_mri_common (int small ATTRIBUTE_UNUSED)
1833 stop = mri_comment_field (&stopc);
1837 name = input_line_pointer;
1838 if (!ISDIGIT (*name))
1839 c = get_symbol_name (& name);
1844 ++input_line_pointer;
1846 while (ISDIGIT (*input_line_pointer));
1848 c = *input_line_pointer;
1849 *input_line_pointer = '\0';
1851 if (line_label != NULL)
1853 alc = XNEWVEC (char, strlen (S_GET_NAME (line_label))
1854 + (input_line_pointer - name) + 1);
1855 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1860 sym = symbol_find_or_make (name);
1861 c = restore_line_pointer (c);
1865 if (*input_line_pointer != ',')
1869 ++input_line_pointer;
1870 align = get_absolute_expression ();
1873 if (S_IS_DEFINED (sym) && !S_IS_COMMON (sym))
1875 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym));
1876 ignore_rest_of_line ();
1877 mri_comment_end (stop, stopc);
1881 S_SET_EXTERNAL (sym);
1882 S_SET_SEGMENT (sym, bfd_com_section_ptr);
1883 mri_common_symbol = sym;
1887 S_SET_ALIGN (sym, align);
1892 if (line_label != NULL)
1895 exp.X_op = O_symbol;
1896 exp.X_add_symbol = sym;
1897 exp.X_add_number = 0;
1898 symbol_set_value_expression (line_label, &exp);
1899 symbol_set_frag (line_label, &zero_address_frag);
1900 S_SET_SEGMENT (line_label, expr_section);
1903 /* FIXME: We just ignore the small argument, which distinguishes
1904 COMMON and COMMON.S. I don't know what we can do about it. */
1906 /* Ignore the type and hptype. */
1907 if (*input_line_pointer == ',')
1908 input_line_pointer += 2;
1909 if (*input_line_pointer == ',')
1910 input_line_pointer += 2;
1912 demand_empty_rest_of_line ();
1914 mri_comment_end (stop, stopc);
1918 s_data (int ignore ATTRIBUTE_UNUSED)
1923 temp = get_absolute_expression ();
1924 if (flag_readonly_data_in_text)
1926 section = text_section;
1930 section = data_section;
1932 subseg_set (section, (subsegT) temp);
1934 demand_empty_rest_of_line ();
1937 /* Handle the .appfile pseudo-op. This is automatically generated by
1938 do_scrub_chars when a preprocessor # line comment is seen with a
1939 file name. This default definition may be overridden by the object
1940 or CPU specific pseudo-ops. This function is also the default
1941 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1945 s_app_file_string (char *file, int appfile ATTRIBUTE_UNUSED)
1949 listing_source_file (file);
1951 register_dependency (file);
1953 obj_app_file (file, appfile);
1958 s_app_file (int appfile)
1963 /* Some assemblers tolerate immediately following '"'. */
1964 if ((s = demand_copy_string (&length)) != 0)
1967 = (!new_logical_line_flags (s, -1, 1) && appfile);
1969 /* In MRI mode, the preprocessor may have inserted an extraneous
1972 && *input_line_pointer == '\''
1973 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1974 ++input_line_pointer;
1976 demand_empty_rest_of_line ();
1978 s_app_file_string (s, appfile);
1983 get_linefile_number (int *flag)
1987 if (*input_line_pointer < '0' || *input_line_pointer > '9')
1990 *flag = get_absolute_expression ();
1995 /* Handle the .appline pseudo-op. This is automatically generated by
1996 do_scrub_chars when a preprocessor # line comment is seen. This
1997 default definition may be overridden by the object or CPU specific
2001 s_app_line (int appline)
2006 /* The given number is that of the next line. */
2008 l = get_absolute_expression ();
2009 else if (!get_linefile_number (&l))
2011 ignore_rest_of_line ();
2018 /* Some of the back ends can't deal with non-positive line numbers.
2019 Besides, it's silly. GCC however will generate a line number of
2020 zero when it is pre-processing builtins for assembler-with-cpp files:
2024 We do not want to barf on this, especially since such files are used
2025 in the GCC and GDB testsuites. So we check for negative line numbers
2026 rather than non-positive line numbers. */
2027 as_warn (_("line numbers must be positive; line number %d rejected"),
2038 if (*input_line_pointer == '"')
2039 file = demand_copy_string (&length);
2045 while (get_linefile_number (&this_flag))
2048 /* From GCC's cpp documentation:
2049 1: start of a new file.
2050 2: returning to a file after having included
2052 3: following text comes from a system header file.
2053 4: following text should be treated as extern "C".
2055 4 is nonsensical for the assembler; 3, we don't
2056 care about, so we ignore it just in case a
2057 system header file is included while
2058 preprocessing assembly. So 1 and 2 are all we
2059 care about, and they are mutually incompatible.
2060 new_logical_line_flags() demands this. */
2063 if (flags && flags != (1 << this_flag))
2064 as_warn (_("incompatible flag %i in line directive"),
2067 flags |= 1 << this_flag;
2072 /* We ignore these. */
2076 as_warn (_("unsupported flag %i in line directive"),
2081 if (!is_end_of_line[(unsigned char)*input_line_pointer])
2086 if (appline || file)
2088 new_logical_line_flags (file, l, flags);
2091 listing_source_line (l);
2095 if (appline || file)
2096 demand_empty_rest_of_line ();
2098 ignore_rest_of_line ();
2101 /* Handle the .end pseudo-op. Actually, the real work is done in
2102 read_a_source_file. */
2105 s_end (int ignore ATTRIBUTE_UNUSED)
2109 /* The MRI assembler permits the start symbol to follow .end,
2110 but we don't support that. */
2112 if (!is_end_of_line[(unsigned char) *input_line_pointer]
2113 && *input_line_pointer != '*'
2114 && *input_line_pointer != '!')
2115 as_warn (_("start address not supported"));
2119 /* Handle the .err pseudo-op. */
2122 s_err (int ignore ATTRIBUTE_UNUSED)
2124 as_bad (_(".err encountered"));
2125 demand_empty_rest_of_line ();
2128 /* Handle the .error and .warning pseudo-ops. */
2134 /* The purpose for the conditional assignment is not to
2135 internationalize the directive itself, but that we need a
2136 self-contained message, one that can be passed like the
2137 demand_copy_C_string return value, and with no assumption on the
2138 location of the name of the directive within the message. */
2140 = (err ? _(".error directive invoked in source file")
2141 : _(".warning directive invoked in source file"));
2143 if (!is_it_end_of_statement ())
2145 if (*input_line_pointer != '\"')
2147 as_bad (_("%s argument must be a string"),
2148 err ? ".error" : ".warning");
2149 ignore_rest_of_line ();
2153 msg = demand_copy_C_string (&len);
2161 as_warn ("%s", msg);
2162 demand_empty_rest_of_line ();
2165 /* Handle the MRI fail pseudo-op. */
2168 s_fail (int ignore ATTRIBUTE_UNUSED)
2175 stop = mri_comment_field (&stopc);
2177 temp = get_absolute_expression ();
2179 as_warn (_(".fail %ld encountered"), (long) temp);
2181 as_bad (_(".fail %ld encountered"), (long) temp);
2183 demand_empty_rest_of_line ();
2186 mri_comment_end (stop, stopc);
2190 s_fill (int ignore ATTRIBUTE_UNUSED)
2192 expressionS rep_exp;
2197 #ifdef md_flush_pending_output
2198 md_flush_pending_output ();
2201 #ifdef md_cons_align
2205 expression (&rep_exp);
2206 if (*input_line_pointer == ',')
2208 input_line_pointer++;
2209 size = get_absolute_expression ();
2210 if (*input_line_pointer == ',')
2212 input_line_pointer++;
2213 fill = get_absolute_expression ();
2217 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
2218 #define BSD_FILL_SIZE_CROCK_8 (8)
2219 if (size > BSD_FILL_SIZE_CROCK_8)
2221 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8);
2222 size = BSD_FILL_SIZE_CROCK_8;
2226 as_warn (_("size negative; .fill ignored"));
2229 else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
2231 if (rep_exp.X_add_number < 0)
2232 as_warn (_("repeat < 0; .fill ignored"));
2236 if (size && !need_pass_2)
2238 if (now_seg == absolute_section)
2240 if (rep_exp.X_op != O_constant)
2241 as_bad (_("non-constant fill count for absolute section"));
2242 else if (fill && rep_exp.X_add_number != 0)
2243 as_bad (_("attempt to fill absolute section with non-zero value"));
2244 abs_section_offset += rep_exp.X_add_number * size;
2247 && (rep_exp.X_op != O_constant || rep_exp.X_add_number != 0)
2249 as_bad (_("attempt to fill section `%s' with non-zero value"),
2250 segment_name (now_seg));
2252 if (rep_exp.X_op == O_constant)
2254 p = frag_var (rs_fill, (int) size, (int) size,
2255 (relax_substateT) 0, (symbolS *) 0,
2256 (offsetT) rep_exp.X_add_number,
2261 /* We don't have a constant repeat count, so we can't use
2262 rs_fill. We can get the same results out of rs_space,
2263 but its argument is in bytes, so we must multiply the
2264 repeat count by size. */
2267 rep_sym = make_expr_symbol (&rep_exp);
2270 expressionS size_exp;
2271 size_exp.X_op = O_constant;
2272 size_exp.X_add_number = size;
2274 rep_exp.X_op = O_multiply;
2275 rep_exp.X_add_symbol = rep_sym;
2276 rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
2277 rep_exp.X_add_number = 0;
2278 rep_sym = make_expr_symbol (&rep_exp);
2281 p = frag_var (rs_space, (int) size, (int) size,
2282 (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
2285 memset (p, 0, (unsigned int) size);
2287 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
2288 flavoured AS. The following bizarre behaviour is to be
2289 compatible with above. I guess they tried to take up to 8
2290 bytes from a 4-byte expression and they forgot to sign
2292 #define BSD_FILL_SIZE_CROCK_4 (4)
2293 md_number_to_chars (p, (valueT) fill,
2294 (size > BSD_FILL_SIZE_CROCK_4
2295 ? BSD_FILL_SIZE_CROCK_4
2297 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
2298 but emits no error message because it seems a legal thing to do.
2299 It is a degenerate case of .fill but could be emitted by a
2302 demand_empty_rest_of_line ();
2306 s_globl (int ignore ATTRIBUTE_UNUSED)
2315 stop = mri_comment_field (&stopc);
2319 if ((name = read_symbol_name ()) == NULL)
2322 symbolP = symbol_find_or_make (name);
2323 S_SET_EXTERNAL (symbolP);
2326 c = *input_line_pointer;
2329 input_line_pointer++;
2331 if (is_end_of_line[(unsigned char) *input_line_pointer])
2339 demand_empty_rest_of_line ();
2342 mri_comment_end (stop, stopc);
2345 /* Handle the MRI IRP and IRPC pseudo-ops. */
2357 file = as_where (&line);
2359 eol = find_end_of_line (input_line_pointer, 0);
2360 sb_build (&s, eol - input_line_pointer);
2361 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2362 input_line_pointer = eol;
2366 err = expand_irp (irpc, 0, &s, &out, get_non_macro_line_sb);
2368 as_bad_where (file, line, "%s", err);
2372 input_scrub_include_sb (&out, input_line_pointer, 1);
2374 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2377 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2378 the section to only be linked once. However, this is not supported
2379 by most object file formats. This takes an optional argument,
2380 which is what to do about duplicates. */
2383 s_linkonce (int ignore ATTRIBUTE_UNUSED)
2385 enum linkonce_type type;
2389 type = LINKONCE_DISCARD;
2391 if (!is_end_of_line[(unsigned char) *input_line_pointer])
2396 c = get_symbol_name (& s);
2397 if (strcasecmp (s, "discard") == 0)
2398 type = LINKONCE_DISCARD;
2399 else if (strcasecmp (s, "one_only") == 0)
2400 type = LINKONCE_ONE_ONLY;
2401 else if (strcasecmp (s, "same_size") == 0)
2402 type = LINKONCE_SAME_SIZE;
2403 else if (strcasecmp (s, "same_contents") == 0)
2404 type = LINKONCE_SAME_CONTENTS;
2406 as_warn (_("unrecognized .linkonce type `%s'"), s);
2408 (void) restore_line_pointer (c);
2411 #ifdef obj_handle_link_once
2412 obj_handle_link_once (type);
2413 #else /* ! defined (obj_handle_link_once) */
2417 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
2418 as_warn (_(".linkonce is not supported for this object file format"));
2420 flags = bfd_get_section_flags (stdoutput, now_seg);
2421 flags |= SEC_LINK_ONCE;
2426 case LINKONCE_DISCARD:
2427 flags |= SEC_LINK_DUPLICATES_DISCARD;
2429 case LINKONCE_ONE_ONLY:
2430 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
2432 case LINKONCE_SAME_SIZE:
2433 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
2435 case LINKONCE_SAME_CONTENTS:
2436 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
2439 if (!bfd_set_section_flags (stdoutput, now_seg, flags))
2440 as_bad (_("bfd_set_section_flags: %s"),
2441 bfd_errmsg (bfd_get_error ()));
2443 #endif /* ! defined (obj_handle_link_once) */
2445 demand_empty_rest_of_line ();
2449 bss_alloc (symbolS *symbolP, addressT size, unsigned int align)
2452 segT current_seg = now_seg;
2453 subsegT current_subseg = now_subseg;
2454 segT bss_seg = bss_section;
2456 #if defined (TC_MIPS) || defined (TC_ALPHA)
2457 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
2458 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
2460 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2461 if (size <= bfd_get_gp_size (stdoutput))
2463 bss_seg = subseg_new (".sbss", 1);
2464 seg_info (bss_seg)->bss = 1;
2465 if (!bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
2466 as_warn (_("error setting flags for \".sbss\": %s"),
2467 bfd_errmsg (bfd_get_error ()));
2471 subseg_set (bss_seg, 1);
2473 if (align > OCTETS_PER_BYTE_POWER)
2475 record_alignment (bss_seg, align);
2476 frag_align (align, 0, 0);
2479 /* Detach from old frag. */
2480 if (S_GET_SEGMENT (symbolP) == bss_seg)
2481 symbol_get_frag (symbolP)->fr_symbol = NULL;
2483 symbol_set_frag (symbolP, frag_now);
2484 pfrag = frag_var (rs_org, 1, 1, 0, symbolP, size, NULL);
2488 S_SET_SIZE (symbolP, size);
2490 S_SET_SEGMENT (symbolP, bss_seg);
2493 /* The symbol may already have been created with a preceding
2494 ".globl" directive -- be careful not to step on storage class
2495 in that case. Otherwise, set it to static. */
2496 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
2497 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2498 #endif /* OBJ_COFF */
2500 subseg_set (current_seg, current_subseg);
2504 parse_align (int align_bytes)
2510 if (*input_line_pointer != ',')
2513 as_bad (_("expected alignment after size"));
2514 ignore_rest_of_line ();
2518 input_line_pointer++;
2521 align = get_absolute_expr (&exp);
2522 if (exp.X_op == O_absent)
2525 if (!exp.X_unsigned)
2527 as_warn (_("alignment negative; 0 assumed"));
2531 if (align_bytes && align != 0)
2533 /* convert to a power of 2 alignment */
2534 unsigned int alignp2 = 0;
2535 while ((align & 1) == 0)
2536 align >>= 1, ++alignp2;
2539 as_bad (_("alignment not a power of 2"));
2540 ignore_rest_of_line ();
2548 /* Called from s_comm_internal after symbol name and size have been
2549 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2550 1 if this was a ".bss" directive which has a 3rd argument
2551 (alignment as a power of 2), or 2 if this was a ".bss" directive
2552 with alignment in bytes. */
2555 s_lcomm_internal (int needs_align, symbolS *symbolP, addressT size)
2561 align = parse_align (needs_align - 1);
2562 if (align == (addressT) -1)
2566 /* Assume some objects may require alignment on some systems. */
2567 TC_IMPLICIT_LCOMM_ALIGNMENT (size, align);
2569 bss_alloc (symbolP, size, align);
2574 s_lcomm (int needs_align)
2576 s_comm_internal (needs_align, s_lcomm_internal);
2580 s_lcomm_bytes (int needs_align)
2582 s_comm_internal (needs_align * 2, s_lcomm_internal);
2586 s_lsym (int ignore ATTRIBUTE_UNUSED)
2592 /* We permit ANY defined expression: BSD4.2 demands constants. */
2593 if ((name = read_symbol_name ()) == NULL)
2596 if (*input_line_pointer != ',')
2598 as_bad (_("expected comma after \"%s\""), name);
2602 input_line_pointer++;
2603 expression_and_evaluate (&exp);
2605 if (exp.X_op != O_constant
2606 && exp.X_op != O_register)
2608 as_bad (_("bad expression"));
2612 symbolP = symbol_find_or_make (name);
2614 if (S_GET_SEGMENT (symbolP) == undefined_section)
2616 /* The name might be an undefined .global symbol; be sure to
2617 keep the "external" bit. */
2618 S_SET_SEGMENT (symbolP,
2619 (exp.X_op == O_constant
2622 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2626 as_bad (_("symbol `%s' is already defined"), name);
2629 demand_empty_rest_of_line ();
2634 ignore_rest_of_line ();
2639 /* Read a line into an sb. Returns the character that ended the line
2640 or zero if there are no more lines. */
2643 get_line_sb (sb *line, int in_macro)
2647 if (input_line_pointer[-1] == '\n')
2648 bump_line_counters ();
2650 if (input_line_pointer >= buffer_limit)
2652 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2653 if (buffer_limit == 0)
2657 eol = _find_end_of_line (input_line_pointer, flag_m68k_mri, 0, in_macro);
2658 sb_add_buffer (line, input_line_pointer, eol - input_line_pointer);
2659 input_line_pointer = eol;
2661 /* Don't skip multiple end-of-line characters, because that breaks support
2662 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2663 characters but isn't. Instead just skip one end of line character and
2664 return the character skipped so that the caller can re-insert it if
2666 return *input_line_pointer++;
2670 get_non_macro_line_sb (sb *line)
2672 return get_line_sb (line, 0);
2676 get_macro_line_sb (sb *line)
2678 return get_line_sb (line, 1);
2681 /* Define a macro. This is an interface to macro.c. */
2684 s_macro (int ignore ATTRIBUTE_UNUSED)
2693 file = as_where (&line);
2695 eol = find_end_of_line (input_line_pointer, 0);
2696 sb_build (&s, eol - input_line_pointer);
2697 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2698 input_line_pointer = eol;
2700 if (line_label != NULL)
2705 name = S_GET_NAME (line_label);
2706 len = strlen (name);
2707 sb_build (&label, len);
2708 sb_add_buffer (&label, name, len);
2709 err = define_macro (0, &s, &label, get_macro_line_sb, file, line, &name);
2713 err = define_macro (0, &s, NULL, get_macro_line_sb, file, line, &name);
2715 as_bad_where (file, line, err, name);
2718 if (line_label != NULL)
2720 S_SET_SEGMENT (line_label, absolute_section);
2721 S_SET_VALUE (line_label, 0);
2722 symbol_set_frag (line_label, &zero_address_frag);
2725 if (((NO_PSEUDO_DOT || flag_m68k_mri)
2726 && hash_find (po_hash, name) != NULL)
2729 && hash_find (po_hash, name + 1) != NULL))
2730 as_warn_where (file,
2732 _("attempt to redefine pseudo-op `%s' ignored"),
2739 /* Handle the .mexit pseudo-op, which immediately exits a macro
2743 s_mexit (int ignore ATTRIBUTE_UNUSED)
2747 cond_exit_macro (macro_nest);
2748 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2751 as_warn (_("ignoring macro exit outside a macro definition."));
2754 /* Switch in and out of MRI mode. */
2757 s_mri (int ignore ATTRIBUTE_UNUSED)
2760 #ifdef MRI_MODE_CHANGE
2764 on = get_absolute_expression ();
2765 #ifdef MRI_MODE_CHANGE
2766 old_flag = flag_mri;
2785 /* Operator precedence changes in m68k MRI mode, so we need to
2786 update the operator rankings. */
2787 expr_set_precedence ();
2789 #ifdef MRI_MODE_CHANGE
2791 MRI_MODE_CHANGE (on);
2794 demand_empty_rest_of_line ();
2797 /* Handle changing the location counter. */
2800 do_org (segT segment, expressionS *exp, int fill)
2802 if (segment != now_seg
2803 && segment != absolute_section
2804 && segment != expr_section)
2805 as_bad (_("invalid segment \"%s\""), segment_name (segment));
2807 if (now_seg == absolute_section)
2810 as_warn (_("ignoring fill value in absolute section"));
2811 if (exp->X_op != O_constant)
2813 as_bad (_("only constant offsets supported in absolute section"));
2814 exp->X_add_number = 0;
2816 abs_section_offset = exp->X_add_number;
2821 symbolS *sym = exp->X_add_symbol;
2822 offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
2824 if (fill && in_bss ())
2825 as_warn (_("ignoring fill value in section `%s'"),
2826 segment_name (now_seg));
2828 if (exp->X_op != O_constant && exp->X_op != O_symbol)
2830 /* Handle complex expressions. */
2831 sym = make_expr_symbol (exp);
2835 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
2841 s_org (int ignore ATTRIBUTE_UNUSED)
2847 #ifdef md_flush_pending_output
2848 md_flush_pending_output ();
2851 /* The m68k MRI assembler has a different meaning for .org. It
2852 means to create an absolute section at a given address. We can't
2853 support that--use a linker script instead. */
2856 as_bad (_("MRI style ORG pseudo-op not supported"));
2857 ignore_rest_of_line ();
2861 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2862 thing as a sub-segment-relative origin. Any absolute origin is
2863 given a warning, then assumed to be segment-relative. Any
2864 segmented origin expression ("foo+42") had better be in the right
2865 segment or the .org is ignored.
2867 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2868 we never know sub-segment sizes when we are reading code. BSD
2869 will crash trying to emit negative numbers of filler bytes in
2870 certain .orgs. We don't crash, but see as-write for that code.
2872 Don't make frag if need_pass_2==1. */
2873 segment = get_known_segmented_expression (&exp);
2874 if (*input_line_pointer == ',')
2876 input_line_pointer++;
2877 temp_fill = get_absolute_expression ();
2883 do_org (segment, &exp, temp_fill);
2885 demand_empty_rest_of_line ();
2888 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2889 called by the obj-format routine which handles section changing
2890 when in MRI mode. It will create a new section, and return it. It
2891 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2892 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2895 s_mri_sect (char *type ATTRIBUTE_UNUSED)
2905 name = input_line_pointer;
2906 if (!ISDIGIT (*name))
2907 c = get_symbol_name (& name);
2912 ++input_line_pointer;
2914 while (ISDIGIT (*input_line_pointer));
2916 c = *input_line_pointer;
2917 *input_line_pointer = '\0';
2920 name = xstrdup (name);
2922 c = restore_line_pointer (c);
2924 seg = subseg_new (name, 0);
2930 ++input_line_pointer;
2931 align = get_absolute_expression ();
2932 record_alignment (seg, align);
2936 if (*input_line_pointer == ',')
2938 c = *++input_line_pointer;
2940 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2943 as_bad (_("unrecognized section type"));
2944 ++input_line_pointer;
2949 flags = SEC_NO_FLAGS;
2951 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2952 else if (*type == 'D' || *type == 'M')
2953 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2954 else if (*type == 'R')
2955 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2956 if (flags != SEC_NO_FLAGS)
2958 if (!bfd_set_section_flags (stdoutput, seg, flags))
2959 as_warn (_("error setting flags for \"%s\": %s"),
2960 bfd_section_name (stdoutput, seg),
2961 bfd_errmsg (bfd_get_error ()));
2966 /* Ignore the HP type. */
2967 if (*input_line_pointer == ',')
2968 input_line_pointer += 2;
2970 demand_empty_rest_of_line ();
2972 #else /* ! TC_M68K */
2981 c = get_symbol_name (& name);
2983 name = xstrdup (name);
2985 c = restore_line_pointer (c);
2987 seg = subseg_new (name, 0);
2995 ++input_line_pointer;
2997 c = get_symbol_name (& sectype);
2998 if (*sectype == '\0')
3000 else if (strcasecmp (sectype, "text") == 0)
3002 else if (strcasecmp (sectype, "data") == 0)
3004 else if (strcasecmp (sectype, "romdata") == 0)
3007 as_warn (_("unrecognized section type `%s'"), sectype);
3008 (void) restore_line_pointer (c);
3011 if (*input_line_pointer == ',')
3015 ++input_line_pointer;
3017 c = get_symbol_name (& seccmd);
3018 if (strcasecmp (seccmd, "absolute") == 0)
3020 as_bad (_("absolute sections are not supported"));
3021 *input_line_pointer = c;
3022 ignore_rest_of_line ();
3025 else if (strcasecmp (seccmd, "align") == 0)
3029 (void) restore_line_pointer (c);
3030 align = get_absolute_expression ();
3031 record_alignment (seg, align);
3035 as_warn (_("unrecognized section command `%s'"), seccmd);
3036 (void) restore_line_pointer (c);
3040 demand_empty_rest_of_line ();
3042 #else /* ! TC_I960 */
3043 /* The MRI assembler seems to use different forms of .sect for
3044 different targets. */
3045 as_bad ("MRI mode not supported for this target");
3046 ignore_rest_of_line ();
3047 #endif /* ! TC_I960 */
3048 #endif /* ! TC_M68K */
3051 /* Handle the .print pseudo-op. */
3054 s_print (int ignore ATTRIBUTE_UNUSED)
3059 s = demand_copy_C_string (&len);
3062 demand_empty_rest_of_line ();
3065 /* Handle the .purgem pseudo-op. */
3068 s_purgem (int ignore ATTRIBUTE_UNUSED)
3070 if (is_it_end_of_statement ())
3072 demand_empty_rest_of_line ();
3082 c = get_symbol_name (& name);
3083 delete_macro (name);
3084 *input_line_pointer = c;
3085 SKIP_WHITESPACE_AFTER_NAME ();
3087 while (*input_line_pointer++ == ',');
3089 --input_line_pointer;
3090 demand_empty_rest_of_line ();
3093 /* Handle the .endm/.endr pseudo-ops. */
3096 s_bad_end (int endr)
3098 as_warn (_(".end%c encountered without preceding %s"),
3100 endr ? ".rept, .irp, or .irpc" : ".macro");
3101 demand_empty_rest_of_line ();
3104 /* Handle the .rept pseudo-op. */
3107 s_rept (int ignore ATTRIBUTE_UNUSED)
3111 count = (size_t) get_absolute_expression ();
3113 do_repeat (count, "REPT", "ENDR");
3116 /* This function provides a generic repeat block implementation. It allows
3117 different directives to be used as the start/end keys. */
3120 do_repeat (size_t count, const char *start, const char *end)
3125 if (((ssize_t) count) < 0)
3127 as_bad (_("negative count for %s - ignored"), start);
3132 if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
3134 as_bad (_("%s without %s"), start, end);
3138 sb_build (&many, count * one.len);
3140 sb_add_sb (&many, &one);
3144 input_scrub_include_sb (&many, input_line_pointer, 1);
3146 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
3149 /* Like do_repeat except that any text matching EXPANDER in the
3150 block is replaced by the iteration count. */
3153 do_repeat_with_expander (size_t count,
3156 const char * expander)
3161 if (((ssize_t) count) < 0)
3163 as_bad (_("negative count for %s - ignored"), start);
3168 if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
3170 as_bad (_("%s without %s"), start, end);
3176 if (expander != NULL && strstr (one.ptr, expander) != NULL)
3178 while (count -- > 0)
3184 sb_build (& processed, one.len);
3185 sb_add_sb (& processed, & one);
3186 sub = strstr (processed.ptr, expander);
3187 len = sprintf (sub, "%lu", (unsigned long) count);
3188 gas_assert (len < 8);
3189 strcpy (sub + len, sub + 8);
3190 processed.len -= (8 - len);
3191 sb_add_sb (& many, & processed);
3192 sb_kill (& processed);
3197 sb_add_sb (&many, &one);
3201 input_scrub_include_sb (&many, input_line_pointer, 1);
3203 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
3206 /* Skip to end of current repeat loop; EXTRA indicates how many additional
3207 input buffers to skip. Assumes that conditionals preceding the loop end
3208 are properly nested.
3210 This function makes it easier to implement a premature "break" out of the
3211 loop. The EXTRA arg accounts for other buffers we might have inserted,
3212 such as line substitutions. */
3215 end_repeat (int extra)
3217 cond_exit_macro (macro_nest);
3218 while (extra-- >= 0)
3219 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
3223 assign_symbol (char *name, int mode)
3227 if (name[0] == '.' && name[1] == '\0')
3229 /* Turn '. = mumble' into a .org mumble. */
3233 segment = get_known_segmented_expression (&exp);
3236 do_org (segment, &exp, 0);
3241 if ((symbolP = symbol_find (name)) == NULL
3242 && (symbolP = md_undefined_symbol (name)) == NULL)
3244 symbolP = symbol_find_or_make (name);
3246 /* When doing symbol listings, play games with dummy fragments living
3247 outside the normal fragment chain to record the file and line info
3249 if (listing & LISTING_SYMBOLS)
3251 extern struct list_info_struct *listing_tail;
3252 fragS *dummy_frag = XCNEW (fragS);
3253 dummy_frag->line = listing_tail;
3254 dummy_frag->fr_symbol = symbolP;
3255 symbol_set_frag (symbolP, dummy_frag);
3258 #if defined (OBJ_COFF) && !defined (TE_PE)
3259 /* "set" symbols are local unless otherwise specified. */
3260 SF_SET_LOCAL (symbolP);
3264 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
3266 if ((mode != 0 || !S_IS_VOLATILE (symbolP))
3267 && !S_CAN_BE_REDEFINED (symbolP))
3269 as_bad (_("symbol `%s' is already defined"), name);
3270 ignore_rest_of_line ();
3271 input_line_pointer--;
3274 /* If the symbol is volatile, copy the symbol and replace the
3275 original with the copy, so that previous uses of the symbol will
3276 retain the value of the symbol at the point of use. */
3277 else if (S_IS_VOLATILE (symbolP))
3278 symbolP = symbol_clone (symbolP, 1);
3282 S_SET_VOLATILE (symbolP);
3284 S_SET_FORWARD_REF (symbolP);
3286 pseudo_set (symbolP);
3289 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3290 then this is .equiv, and it is an error if the symbol is already
3291 defined. If EQUIV is -1, the symbol additionally is a forward
3299 /* Especial apologies for the random logic:
3300 this just grew, and could be parsed much more simply!
3302 if ((name = read_symbol_name ()) == NULL)
3305 if (*input_line_pointer != ',')
3307 as_bad (_("expected comma after \"%s\""), name);
3308 ignore_rest_of_line ();
3313 input_line_pointer++;
3314 assign_symbol (name, equiv);
3315 demand_empty_rest_of_line ();
3329 #ifdef md_flush_pending_output
3330 md_flush_pending_output ();
3333 #ifdef md_cons_align
3338 stop = mri_comment_field (&stopc);
3340 /* In m68k MRI mode, we need to align to a word boundary, unless
3342 if (flag_m68k_mri && mult > 1)
3344 if (now_seg == absolute_section)
3346 abs_section_offset += abs_section_offset & 1;
3347 if (line_label != NULL)
3348 S_SET_VALUE (line_label, abs_section_offset);
3350 else if (mri_common_symbol != NULL)
3354 mri_val = S_GET_VALUE (mri_common_symbol);
3355 if ((mri_val & 1) != 0)
3357 S_SET_VALUE (mri_common_symbol, mri_val + 1);
3358 if (line_label != NULL)
3360 expressionS *symexp;
3362 symexp = symbol_get_value_expression (line_label);
3363 know (symexp->X_op == O_symbol);
3364 know (symexp->X_add_symbol == mri_common_symbol);
3365 symexp->X_add_number += 1;
3371 do_align (1, (char *) NULL, 0, 0);
3372 if (line_label != NULL)
3374 symbol_set_frag (line_label, frag_now);
3375 S_SET_VALUE (line_label, frag_now_fix ());
3385 if (*input_line_pointer == ',')
3387 ++input_line_pointer;
3392 val.X_op = O_constant;
3393 val.X_add_number = 0;
3396 if ((val.X_op != O_constant
3397 || val.X_add_number < - 0x80
3398 || val.X_add_number > 0xff
3399 || (mult != 0 && mult != 1 && val.X_add_number != 0))
3400 && (now_seg != absolute_section && !in_bss ()))
3402 resolve_expression (&exp);
3403 if (exp.X_op != O_constant)
3404 as_bad (_("unsupported variable size or fill value"));
3409 /* PR 20901: Check for excessive values.
3410 FIXME: 1<<10 is an arbitrary limit. Maybe use maxpagesize instead ? */
3411 if (exp.X_add_number < 0 || exp.X_add_number > (1 << 10))
3412 as_bad (_("size value for space directive too large: %lx"),
3413 (long) exp.X_add_number);
3418 bytes = mult * exp.X_add_number;
3420 for (i = 0; i < exp.X_add_number; i++)
3421 emit_expr (&val, mult);
3427 if (now_seg == absolute_section || mri_common_symbol != NULL)
3428 resolve_expression (&exp);
3430 if (exp.X_op == O_constant)
3434 repeat = exp.X_add_number;
3441 as_warn (_(".space repeat count is zero, ignored"));
3442 else if (repeat < 0)
3443 as_warn (_(".space repeat count is negative, ignored"));
3447 /* If we are in the absolute section, just bump the offset. */
3448 if (now_seg == absolute_section)
3450 if (val.X_op != O_constant || val.X_add_number != 0)
3451 as_warn (_("ignoring fill value in absolute section"));
3452 abs_section_offset += repeat;
3456 /* If we are secretly in an MRI common section, then
3457 creating space just increases the size of the common
3459 if (mri_common_symbol != NULL)
3461 S_SET_VALUE (mri_common_symbol,
3462 S_GET_VALUE (mri_common_symbol) + repeat);
3467 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
3468 (offsetT) repeat, (char *) 0);
3472 if (now_seg == absolute_section)
3474 as_bad (_("space allocation too complex in absolute section"));
3475 subseg_set (text_section, 0);
3478 if (mri_common_symbol != NULL)
3480 as_bad (_("space allocation too complex in common section"));
3481 mri_common_symbol = NULL;
3485 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
3486 make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
3489 if ((val.X_op != O_constant || val.X_add_number != 0) && in_bss ())
3490 as_warn (_("ignoring fill value in section `%s'"),
3491 segment_name (now_seg));
3493 *p = val.X_add_number;
3498 /* In MRI mode, after an odd number of bytes, we must align to an
3499 even word boundary, unless the next instruction is a dc.b, ds.b
3501 if (flag_mri && (bytes & 1) != 0)
3502 mri_pending_align = 1;
3504 demand_empty_rest_of_line ();
3507 mri_comment_end (stop, stopc);
3510 /* This is like s_space, but the value is a floating point number with
3511 the given precision. This is for the MRI dcb.s pseudo-op and
3515 s_float_space (int float_type)
3519 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3523 #ifdef md_cons_align
3528 stop = mri_comment_field (&stopc);
3530 count = get_absolute_expression ();
3533 if (*input_line_pointer != ',')
3535 as_bad (_("missing value"));
3536 ignore_rest_of_line ();
3538 mri_comment_end (stop, stopc);
3542 ++input_line_pointer;
3546 /* Skip any 0{letter} that may be present. Don't even check if the
3547 * letter is legal. */
3548 if (input_line_pointer[0] == '0'
3549 && ISALPHA (input_line_pointer[1]))
3550 input_line_pointer += 2;
3552 /* Accept :xxxx, where the x's are hex digits, for a floating point
3553 with the exact digits specified. */
3554 if (input_line_pointer[0] == ':')
3556 flen = hex_float (float_type, temp);
3559 ignore_rest_of_line ();
3561 mri_comment_end (stop, stopc);
3569 err = md_atof (float_type, temp, &flen);
3570 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
3571 know (err != NULL || flen > 0);
3574 as_bad (_("bad floating literal: %s"), err);
3575 ignore_rest_of_line ();
3577 mri_comment_end (stop, stopc);
3582 while (--count >= 0)
3586 p = frag_more (flen);
3587 memcpy (p, temp, (unsigned int) flen);
3590 demand_empty_rest_of_line ();
3593 mri_comment_end (stop, stopc);
3596 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3599 s_struct (int ignore ATTRIBUTE_UNUSED)
3605 stop = mri_comment_field (&stopc);
3606 abs_section_offset = get_absolute_expression ();
3607 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3608 /* The ELF backend needs to know that we are changing sections, so
3609 that .previous works correctly. */
3611 obj_elf_section_change_hook ();
3613 subseg_set (absolute_section, 0);
3614 demand_empty_rest_of_line ();
3616 mri_comment_end (stop, stopc);
3620 s_text (int ignore ATTRIBUTE_UNUSED)
3624 temp = get_absolute_expression ();
3625 subseg_set (text_section, (subsegT) temp);
3626 demand_empty_rest_of_line ();
3629 /* .weakref x, y sets x as an alias to y that, as long as y is not
3630 referenced directly, will cause y to become a weak symbol. */
3632 s_weakref (int ignore ATTRIBUTE_UNUSED)
3639 if ((name = read_symbol_name ()) == NULL)
3642 symbolP = symbol_find_or_make (name);
3644 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
3646 if (!S_IS_VOLATILE (symbolP))
3648 as_bad (_("symbol `%s' is already defined"), name);
3651 symbolP = symbol_clone (symbolP, 1);
3652 S_CLEAR_VOLATILE (symbolP);
3657 if (*input_line_pointer != ',')
3659 as_bad (_("expected comma after \"%s\""), name);
3663 input_line_pointer++;
3668 if ((name = read_symbol_name ()) == NULL)
3671 if ((symbolP2 = symbol_find_noref (name, 1)) == NULL
3672 && (symbolP2 = md_undefined_symbol (name)) == NULL)
3674 symbolP2 = symbol_find_or_make (name);
3675 S_SET_WEAKREFD (symbolP2);
3679 symbolS *symp = symbolP2;
3681 while (S_IS_WEAKREFR (symp) && symp != symbolP)
3683 expressionS *expP = symbol_get_value_expression (symp);
3685 gas_assert (expP->X_op == O_symbol
3686 && expP->X_add_number == 0);
3687 symp = expP->X_add_symbol;
3689 if (symp == symbolP)
3693 loop = concat (S_GET_NAME (symbolP),
3694 " => ", S_GET_NAME (symbolP2), (const char *) NULL);
3697 while (symp != symbolP)
3699 char *old_loop = loop;
3701 symp = symbol_get_value_expression (symp)->X_add_symbol;
3702 loop = concat (loop, " => ", S_GET_NAME (symp),
3703 (const char *) NULL);
3707 as_bad (_("%s: would close weakref loop: %s"),
3708 S_GET_NAME (symbolP), loop);
3712 ignore_rest_of_line ();
3716 /* Short-circuiting instead of just checking here might speed
3717 things up a tiny little bit, but loop error messages would
3718 miss intermediate links. */
3719 /* symbolP2 = symp; */
3722 memset (&exp, 0, sizeof (exp));
3723 exp.X_op = O_symbol;
3724 exp.X_add_symbol = symbolP2;
3726 S_SET_SEGMENT (symbolP, undefined_section);
3727 symbol_set_value_expression (symbolP, &exp);
3728 symbol_set_frag (symbolP, &zero_address_frag);
3729 S_SET_WEAKREFR (symbolP);
3731 demand_empty_rest_of_line ();
3736 ignore_rest_of_line ();
3742 /* Verify that we are at the end of a line. If not, issue an error and
3746 demand_empty_rest_of_line (void)
3749 if (is_end_of_line[(unsigned char) *input_line_pointer])
3750 input_line_pointer++;
3753 if (ISPRINT (*input_line_pointer))
3754 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3755 *input_line_pointer);
3757 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3758 *input_line_pointer);
3759 ignore_rest_of_line ();
3762 /* Return pointing just after end-of-line. */
3763 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3766 /* Silently advance to the end of line. Use this after already having
3767 issued an error about something bad. */
3770 ignore_rest_of_line (void)
3772 while (input_line_pointer < buffer_limit
3773 && !is_end_of_line[(unsigned char) *input_line_pointer])
3774 input_line_pointer++;
3776 input_line_pointer++;
3778 /* Return pointing just after end-of-line. */
3779 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3782 /* Sets frag for given symbol to zero_address_frag, except when the
3783 symbol frag is already set to a dummy listing frag. */
3786 set_zero_frag (symbolS *symbolP)
3788 if (symbol_get_frag (symbolP)->fr_type != rs_dummy)
3789 symbol_set_frag (symbolP, &zero_address_frag);
3792 /* In: Pointer to a symbol.
3793 Input_line_pointer->expression.
3795 Out: Input_line_pointer->just after any whitespace after expression.
3796 Tried to set symbol to value of expression.
3797 Will change symbols type, value, and frag; */
3800 pseudo_set (symbolS *symbolP)
3805 know (symbolP); /* NULL pointer is logic error. */
3807 if (!S_IS_FORWARD_REF (symbolP))
3808 (void) expression (&exp);
3810 (void) deferred_expression (&exp);
3812 if (exp.X_op == O_illegal)
3813 as_bad (_("illegal expression"));
3814 else if (exp.X_op == O_absent)
3815 as_bad (_("missing expression"));
3816 else if (exp.X_op == O_big)
3818 if (exp.X_add_number > 0)
3819 as_bad (_("bignum invalid"));
3821 as_bad (_("floating point number invalid"));
3823 else if (exp.X_op == O_subtract
3824 && !S_IS_FORWARD_REF (symbolP)
3825 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
3826 && (symbol_get_frag (exp.X_add_symbol)
3827 == symbol_get_frag (exp.X_op_symbol)))
3829 exp.X_op = O_constant;
3830 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
3831 - S_GET_VALUE (exp.X_op_symbol));
3834 if (symbol_section_p (symbolP))
3836 as_bad ("attempt to set value of section symbol");
3845 exp.X_add_number = 0;
3848 S_SET_SEGMENT (symbolP, absolute_section);
3849 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3850 set_zero_frag (symbolP);
3854 #ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
3855 if (S_IS_EXTERNAL (symbolP))
3857 as_bad ("can't equate global symbol `%s' with register name",
3858 S_GET_NAME (symbolP));
3862 S_SET_SEGMENT (symbolP, reg_section);
3863 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3864 set_zero_frag (symbolP);
3865 symbol_get_value_expression (symbolP)->X_op = O_register;
3869 seg = S_GET_SEGMENT (exp.X_add_symbol);
3870 /* For x=undef+const, create an expression symbol.
3871 For x=x+const, just update x except when x is an undefined symbol
3872 For x=defined+const, evaluate x. */
3873 if (symbolP == exp.X_add_symbol
3874 && (seg != undefined_section
3875 || !symbol_constant_p (symbolP)))
3877 *symbol_X_add_number (symbolP) += exp.X_add_number;
3880 else if (!S_IS_FORWARD_REF (symbolP) && seg != undefined_section)
3882 symbolS *s = exp.X_add_symbol;
3884 if (S_IS_COMMON (s))
3885 as_bad (_("`%s' can't be equated to common symbol `%s'"),
3886 S_GET_NAME (symbolP), S_GET_NAME (s));
3888 S_SET_SEGMENT (symbolP, seg);
3889 S_SET_VALUE (symbolP, exp.X_add_number + S_GET_VALUE (s));
3890 symbol_set_frag (symbolP, symbol_get_frag (s));
3891 copy_symbol_attributes (symbolP, s);
3894 S_SET_SEGMENT (symbolP, undefined_section);
3895 symbol_set_value_expression (symbolP, &exp);
3896 copy_symbol_attributes (symbolP, exp.X_add_symbol);
3897 set_zero_frag (symbolP);
3901 /* The value is some complex expression. */
3902 S_SET_SEGMENT (symbolP, expr_section);
3903 symbol_set_value_expression (symbolP, &exp);
3904 set_zero_frag (symbolP);
3911 CONStruct more frag of .bytes, or .words etc.
3912 Should need_pass_2 be 1 then emit no frag(s).
3913 This understands EXPRESSIONS.
3917 This has a split personality. We use expression() to read the
3918 value. We can detect if the value won't fit in a byte or word.
3919 But we can't detect if expression() discarded significant digits
3920 in the case of a long. Not worth the crocks required to fix it. */
3922 /* Select a parser for cons expressions. */
3924 /* Some targets need to parse the expression in various fancy ways.
3925 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3926 (for example, the HPPA does this). Otherwise, you can define
3927 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3928 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3929 are defined, which is the normal case, then only simple expressions
3934 parse_mri_cons (expressionS *exp, unsigned int nbytes);
3937 #ifndef TC_PARSE_CONS_EXPRESSION
3938 #ifdef BITFIELD_CONS_EXPRESSIONS
3939 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3940 (parse_bitfield_cons (EXP, NBYTES), TC_PARSE_CONS_RETURN_NONE)
3942 parse_bitfield_cons (expressionS *exp, unsigned int nbytes);
3944 #ifdef REPEAT_CONS_EXPRESSIONS
3945 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3946 (parse_repeat_cons (EXP, NBYTES), TC_PARSE_CONS_RETURN_NONE)
3948 parse_repeat_cons (expressionS *exp, unsigned int nbytes);
3951 /* If we haven't gotten one yet, just call expression. */
3952 #ifndef TC_PARSE_CONS_EXPRESSION
3953 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3954 (expression (EXP), TC_PARSE_CONS_RETURN_NONE)
3959 do_parse_cons_expression (expressionS *exp,
3960 int nbytes ATTRIBUTE_UNUSED)
3962 (void) TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3966 /* Worker to do .byte etc statements.
3967 Clobbers input_line_pointer and checks end-of-line. */
3970 cons_worker (int nbytes, /* 1=.byte, 2=.word, 4=.long. */
3978 #ifdef md_flush_pending_output
3979 md_flush_pending_output ();
3983 stop = mri_comment_field (&stopc);
3985 if (is_it_end_of_statement ())
3987 demand_empty_rest_of_line ();
3989 mri_comment_end (stop, stopc);
3993 #ifdef TC_ADDRESS_BYTES
3995 nbytes = TC_ADDRESS_BYTES ();
3998 #ifdef md_cons_align
3999 md_cons_align (nbytes);
4005 TC_PARSE_CONS_RETURN_TYPE ret = TC_PARSE_CONS_RETURN_NONE;
4006 #ifdef TC_CONS_FIX_CHECK
4007 fixS **cur_fix = &frchain_now->fix_tail;
4009 if (*cur_fix != NULL)
4010 cur_fix = &(*cur_fix)->fx_next;
4015 parse_mri_cons (&exp, (unsigned int) nbytes);
4020 if (*input_line_pointer == '"')
4022 as_bad (_("unexpected `\"' in expression"));
4023 ignore_rest_of_line ();
4027 ret = TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
4032 if (exp.X_op == O_symbol)
4033 exp.X_op = O_symbol_rva;
4035 as_fatal (_("rva without symbol"));
4037 emit_expr_with_reloc (&exp, (unsigned int) nbytes, ret);
4038 #ifdef TC_CONS_FIX_CHECK
4039 TC_CONS_FIX_CHECK (&exp, nbytes, *cur_fix);
4043 while (*input_line_pointer++ == ',');
4045 /* In MRI mode, after an odd number of bytes, we must align to an
4046 even word boundary, unless the next instruction is a dc.b, ds.b
4048 if (flag_mri && nbytes == 1 && (c & 1) != 0)
4049 mri_pending_align = 1;
4051 input_line_pointer--; /* Put terminator back into stream. */
4053 demand_empty_rest_of_line ();
4056 mri_comment_end (stop, stopc);
4062 cons_worker (size, 0);
4068 cons_worker (size, 1);
4071 /* .reloc offset, reloc_name, symbol+addend. */
4074 s_reloc (int ignore ATTRIBUTE_UNUSED)
4081 struct reloc_list *reloc;
4082 struct _bfd_rel { const char * name; bfd_reloc_code_real_type code; };
4083 static struct _bfd_rel bfd_relocs[] =
4085 { "NONE", BFD_RELOC_NONE },
4086 { "8", BFD_RELOC_8 },
4087 { "16", BFD_RELOC_16 },
4088 { "32", BFD_RELOC_32 },
4089 { "64", BFD_RELOC_64 }
4092 reloc = XNEW (struct reloc_list);
4095 stop = mri_comment_field (&stopc);
4104 as_bad (_("missing or bad offset expression"));
4107 exp.X_add_symbol = section_symbol (now_seg);
4108 exp.X_op = O_symbol;
4111 if (exp.X_add_number == 0)
4113 reloc->u.a.offset_sym = exp.X_add_symbol;
4118 reloc->u.a.offset_sym = make_expr_symbol (&exp);
4123 if (*input_line_pointer != ',')
4125 as_bad (_("missing reloc type"));
4129 ++input_line_pointer;
4131 c = get_symbol_name (& r_name);
4132 if (strncasecmp (r_name, "BFD_RELOC_", 10) == 0)
4136 for (reloc->u.a.howto = NULL, i = 0; i < ARRAY_SIZE (bfd_relocs); i++)
4137 if (strcasecmp (r_name + 10, bfd_relocs[i].name) == 0)
4139 reloc->u.a.howto = bfd_reloc_type_lookup (stdoutput,
4140 bfd_relocs[i].code);
4145 reloc->u.a.howto = bfd_reloc_name_lookup (stdoutput, r_name);
4146 *input_line_pointer = c;
4147 if (reloc->u.a.howto == NULL)
4149 as_bad (_("unrecognized reloc type"));
4153 exp.X_op = O_absent;
4154 SKIP_WHITESPACE_AFTER_NAME ();
4155 if (*input_line_pointer == ',')
4157 ++input_line_pointer;
4165 as_bad (_("bad reloc expression"));
4167 ignore_rest_of_line ();
4170 mri_comment_end (stop, stopc);
4173 reloc->u.a.sym = NULL;
4174 reloc->u.a.addend = 0;
4177 reloc->u.a.sym = NULL;
4178 reloc->u.a.addend = exp.X_add_number;
4181 reloc->u.a.sym = exp.X_add_symbol;
4182 reloc->u.a.addend = exp.X_add_number;
4185 reloc->u.a.sym = make_expr_symbol (&exp);
4186 reloc->u.a.addend = 0;
4190 reloc->file = as_where (&reloc->line);
4191 reloc->next = reloc_list;
4194 demand_empty_rest_of_line ();
4196 mri_comment_end (stop, stopc);
4199 /* Put the contents of expression EXP into the object file using
4200 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
4203 emit_expr (expressionS *exp, unsigned int nbytes)
4205 emit_expr_with_reloc (exp, nbytes, TC_PARSE_CONS_RETURN_NONE);
4209 emit_expr_with_reloc (expressionS *exp,
4210 unsigned int nbytes,
4211 TC_PARSE_CONS_RETURN_TYPE reloc)
4215 valueT extra_digit = 0;
4217 /* Don't do anything if we are going to make another pass. */
4222 dot_value = frag_now_fix ();
4223 dot_frag = frag_now;
4227 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
4228 appear as a four byte positive constant in the .line section,
4229 followed by a 2 byte 0xffff. Look for that case here. */
4231 static int dwarf_line = -1;
4233 if (strcmp (segment_name (now_seg), ".line") != 0)
4235 else if (dwarf_line >= 0
4237 && exp->X_op == O_constant
4238 && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
4239 listing_source_line ((unsigned int) dwarf_line);
4240 else if (nbytes == 4
4241 && exp->X_op == O_constant
4242 && exp->X_add_number >= 0)
4243 dwarf_line = exp->X_add_number;
4248 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
4249 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
4250 AT_sibling (0x12) followed by a four byte address of the sibling
4251 followed by a 2 byte AT_name (0x38) followed by the name of the
4252 file. We look for that case here. */
4254 static int dwarf_file = 0;
4256 if (strcmp (segment_name (now_seg), ".debug") != 0)
4258 else if (dwarf_file == 0
4260 && exp->X_op == O_constant
4261 && exp->X_add_number == 0x11)
4263 else if (dwarf_file == 1
4265 && exp->X_op == O_constant
4266 && exp->X_add_number == 0x12)
4268 else if (dwarf_file == 2
4271 else if (dwarf_file == 3
4273 && exp->X_op == O_constant
4274 && exp->X_add_number == 0x38)
4279 /* The variable dwarf_file_string tells stringer that the string
4280 may be the name of the source file. */
4281 if (dwarf_file == 4)
4282 dwarf_file_string = 1;
4284 dwarf_file_string = 0;
4289 if (check_eh_frame (exp, &nbytes))
4294 /* Handle a negative bignum. */
4296 && exp->X_add_number == 0
4297 && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
4298 && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
4301 unsigned long carry;
4303 exp = symbol_get_value_expression (exp->X_add_symbol);
4305 /* Negate the bignum: one's complement each digit and add 1. */
4307 for (i = 0; i < exp->X_add_number; i++)
4311 next = (((~(generic_bignum[i] & LITTLENUM_MASK))
4314 generic_bignum[i] = next & LITTLENUM_MASK;
4315 carry = next >> LITTLENUM_NUMBER_OF_BITS;
4318 /* We can ignore any carry out, because it will be handled by
4319 extra_digit if it is needed. */
4321 extra_digit = (valueT) -1;
4325 if (op == O_absent || op == O_illegal)
4327 as_warn (_("zero assumed for missing expression"));
4328 exp->X_add_number = 0;
4331 else if (op == O_big && exp->X_add_number <= 0)
4333 as_bad (_("floating point number invalid"));
4334 exp->X_add_number = 0;
4337 else if (op == O_register)
4339 as_warn (_("register value used as expression"));
4343 /* Allow `.word 0' in the absolute section. */
4344 if (now_seg == absolute_section)
4346 if (op != O_constant || exp->X_add_number != 0)
4347 as_bad (_("attempt to store value in absolute section"));
4348 abs_section_offset += nbytes;
4352 /* Allow `.word 0' in BSS style sections. */
4353 if ((op != O_constant || exp->X_add_number != 0) && in_bss ())
4354 as_bad (_("attempt to store non-zero value in section `%s'"),
4355 segment_name (now_seg));
4357 p = frag_more ((int) nbytes);
4359 if (reloc != TC_PARSE_CONS_RETURN_NONE)
4361 emit_expr_fix (exp, nbytes, frag_now, p, reloc);
4365 #ifndef WORKING_DOT_WORD
4366 /* If we have the difference of two symbols in a word, save it on
4367 the broken_words list. See the code in write.c. */
4368 if (op == O_subtract && nbytes == 2)
4370 struct broken_word *x;
4372 x = XNEW (struct broken_word);
4373 x->next_broken_word = broken_words;
4376 x->subseg = now_subseg;
4378 x->word_goes_here = p;
4380 x->add = exp->X_add_symbol;
4381 x->sub = exp->X_op_symbol;
4382 x->addnum = exp->X_add_number;
4390 /* If we have an integer, but the number of bytes is too large to
4391 pass to md_number_to_chars, handle it as a bignum. */
4392 if (op == O_constant && nbytes > sizeof (valueT))
4394 extra_digit = exp->X_unsigned ? 0 : -1;
4395 convert_to_bignum (exp, !exp->X_unsigned);
4399 if (op == O_constant)
4407 /* JF << of >= number of bits in the object is undefined. In
4408 particular SPARC (Sun 4) has problems. */
4409 if (nbytes >= sizeof (valueT))
4412 if (nbytes > sizeof (valueT))
4415 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
4419 /* Don't store these bits. */
4420 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
4421 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
4424 unmask = ~mask; /* Do store these bits. */
4427 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
4428 mask = ~(unmask >> 1); /* Includes sign bit now. */
4431 get = exp->X_add_number;
4433 if ((get & mask) != 0
4434 && ((get & mask) != mask
4435 || (get & hibit) == 0))
4437 /* Leading bits contain both 0s & 1s. */
4438 #if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG
4440 as_warn (_("value 0x%llx truncated to 0x%llx"),
4441 (unsigned long long) get, (unsigned long long) use);
4443 as_warn (_("value 0x%I64x truncated to 0x%I64x"),
4444 (unsigned long long) get, (unsigned long long) use);
4447 as_warn (_("value 0x%lx truncated to 0x%lx"),
4448 (unsigned long) get, (unsigned long) use);
4451 /* Put bytes in right order. */
4452 md_number_to_chars (p, use, (int) nbytes);
4454 else if (op == O_big)
4457 LITTLENUM_TYPE *nums;
4459 size = exp->X_add_number * CHARS_PER_LITTLENUM;
4462 int i = nbytes / CHARS_PER_LITTLENUM;
4466 LITTLENUM_TYPE sign = 0;
4467 if ((generic_bignum[--i]
4468 & (1 << (LITTLENUM_NUMBER_OF_BITS - 1))) != 0)
4469 sign = ~(LITTLENUM_TYPE) 0;
4471 while (++i < exp->X_add_number)
4472 if (generic_bignum[i] != sign)
4475 else if (nbytes == 1)
4477 /* We have nbytes == 1 and CHARS_PER_LITTLENUM == 2 (probably).
4478 Check that bits 8.. of generic_bignum[0] match bit 7
4479 and that they match all of generic_bignum[1..exp->X_add_number]. */
4480 LITTLENUM_TYPE sign = (generic_bignum[0] & (1 << 7)) ? -1 : 0;
4481 LITTLENUM_TYPE himask = LITTLENUM_MASK & ~ 0xFF;
4483 if ((generic_bignum[0] & himask) == (sign & himask))
4485 while (++i < exp->X_add_number)
4486 if (generic_bignum[i] != sign)
4491 if (i < exp->X_add_number)
4492 as_warn (_("bignum truncated to %d bytes"), nbytes);
4498 md_number_to_chars (p, (valueT) generic_bignum[0], 1);
4501 know (nbytes % CHARS_PER_LITTLENUM == 0);
4503 if (target_big_endian)
4505 while (nbytes > size)
4507 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
4508 nbytes -= CHARS_PER_LITTLENUM;
4509 p += CHARS_PER_LITTLENUM;
4512 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
4513 while (size >= CHARS_PER_LITTLENUM)
4516 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
4517 size -= CHARS_PER_LITTLENUM;
4518 p += CHARS_PER_LITTLENUM;
4523 nums = generic_bignum;
4524 while (size >= CHARS_PER_LITTLENUM)
4526 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
4528 size -= CHARS_PER_LITTLENUM;
4529 p += CHARS_PER_LITTLENUM;
4530 nbytes -= CHARS_PER_LITTLENUM;
4533 while (nbytes >= CHARS_PER_LITTLENUM)
4535 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
4536 nbytes -= CHARS_PER_LITTLENUM;
4537 p += CHARS_PER_LITTLENUM;
4542 emit_expr_fix (exp, nbytes, frag_now, p, TC_PARSE_CONS_RETURN_NONE);
4546 emit_expr_fix (expressionS *exp, unsigned int nbytes, fragS *frag, char *p,
4547 TC_PARSE_CONS_RETURN_TYPE r ATTRIBUTE_UNUSED)
4550 unsigned int size = nbytes;
4552 memset (p, 0, size);
4554 /* Generate a fixS to record the symbol value. */
4556 #ifdef TC_CONS_FIX_NEW
4557 TC_CONS_FIX_NEW (frag, p - frag->fr_literal + offset, size, exp, r);
4559 if (r != TC_PARSE_CONS_RETURN_NONE)
4561 reloc_howto_type *reloc_howto;
4563 reloc_howto = bfd_reloc_type_lookup (stdoutput, r);
4564 size = bfd_get_reloc_size (reloc_howto);
4568 as_bad (_("%s relocations do not fit in %u bytes\n"),
4569 reloc_howto->name, nbytes);
4572 else if (target_big_endian)
4573 offset = nbytes - size;
4594 as_bad (_("unsupported BFD relocation size %u"), size);
4597 fix_new_exp (frag, p - frag->fr_literal + offset, size,
4602 #ifdef BITFIELD_CONS_EXPRESSIONS
4604 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
4605 w:x,y:z, where w and y are bitwidths and x and y are values. They
4606 then pack them all together. We do a little better in that we allow
4607 them in words, longs, etc. and we'll pack them in target byte order
4610 The rules are: pack least significant bit first, if a field doesn't
4611 entirely fit, put it in the next unit. Overflowing the bitfield is
4612 explicitly *not* even a warning. The bitwidth should be considered
4615 To use this function the tc-XXX.h file should define
4616 BITFIELD_CONS_EXPRESSIONS. */
4619 parse_bitfield_cons (expressionS *exp, unsigned int nbytes)
4621 unsigned int bits_available = BITS_PER_CHAR * nbytes;
4622 char *hold = input_line_pointer;
4624 (void) expression (exp);
4626 if (*input_line_pointer == ':')
4633 unsigned long width;
4635 if (*input_line_pointer != ':')
4637 input_line_pointer = hold;
4639 } /* Next piece is not a bitfield. */
4641 /* In the general case, we can't allow
4642 full expressions with symbol
4643 differences and such. The relocation
4644 entries for symbols not defined in this
4645 assembly would require arbitrary field
4646 widths, positions, and masks which most
4647 of our current object formats don't
4650 In the specific case where a symbol
4651 *is* defined in this assembly, we
4652 *could* build fixups and track it, but
4653 this could lead to confusion for the
4654 backends. I'm lazy. I'll take any
4655 SEG_ABSOLUTE. I think that means that
4656 you can use a previous .set or
4657 .equ type symbol. xoxorich. */
4659 if (exp->X_op == O_absent)
4661 as_warn (_("using a bit field width of zero"));
4662 exp->X_add_number = 0;
4663 exp->X_op = O_constant;
4664 } /* Implied zero width bitfield. */
4666 if (exp->X_op != O_constant)
4668 *input_line_pointer = '\0';
4669 as_bad (_("field width \"%s\" too complex for a bitfield"), hold);
4670 *input_line_pointer = ':';
4671 demand_empty_rest_of_line ();
4673 } /* Too complex. */
4675 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
4677 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4678 width, nbytes, (BITS_PER_CHAR * nbytes));
4679 width = BITS_PER_CHAR * nbytes;
4682 if (width > bits_available)
4684 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4685 input_line_pointer = hold;
4686 exp->X_add_number = value;
4691 hold = ++input_line_pointer;
4693 (void) expression (exp);
4694 if (exp->X_op != O_constant)
4696 char cache = *input_line_pointer;
4698 *input_line_pointer = '\0';
4699 as_bad (_("field value \"%s\" too complex for a bitfield"), hold);
4700 *input_line_pointer = cache;
4701 demand_empty_rest_of_line ();
4703 } /* Too complex. */
4705 value |= ((~(-(1 << width)) & exp->X_add_number)
4706 << ((BITS_PER_CHAR * nbytes) - bits_available));
4708 if ((bits_available -= width) == 0
4709 || is_it_end_of_statement ()
4710 || *input_line_pointer != ',')
4713 } /* All the bitfields we're gonna get. */
4715 hold = ++input_line_pointer;
4716 (void) expression (exp);
4719 exp->X_add_number = value;
4720 exp->X_op = O_constant;
4721 exp->X_unsigned = 1;
4722 exp->X_extrabit = 0;
4726 #endif /* BITFIELD_CONS_EXPRESSIONS */
4728 /* Handle an MRI style string expression. */
4732 parse_mri_cons (expressionS *exp, unsigned int nbytes)
4734 if (*input_line_pointer != '\''
4735 && (input_line_pointer[1] != '\''
4736 || (*input_line_pointer != 'A'
4737 && *input_line_pointer != 'E')))
4738 (void) TC_PARSE_CONS_EXPRESSION (exp, nbytes);
4742 unsigned int result = 0;
4744 /* An MRI style string. Cut into as many bytes as will fit into
4745 a nbyte chunk, left justify if necessary, and separate with
4746 commas so we can try again later. */
4747 if (*input_line_pointer == 'A')
4748 ++input_line_pointer;
4749 else if (*input_line_pointer == 'E')
4751 as_bad (_("EBCDIC constants are not supported"));
4752 ++input_line_pointer;
4755 input_line_pointer++;
4756 for (scan = 0; scan < nbytes; scan++)
4758 if (*input_line_pointer == '\'')
4760 if (input_line_pointer[1] == '\'')
4762 input_line_pointer++;
4767 result = (result << 8) | (*input_line_pointer++);
4771 while (scan < nbytes)
4777 /* Create correct expression. */
4778 exp->X_op = O_constant;
4779 exp->X_add_number = result;
4781 /* Fake it so that we can read the next char too. */
4782 if (input_line_pointer[0] != '\'' ||
4783 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
4785 input_line_pointer -= 2;
4786 input_line_pointer[0] = ',';
4787 input_line_pointer[1] = '\'';
4790 input_line_pointer++;
4793 #endif /* TC_M68K */
4795 #ifdef REPEAT_CONS_EXPRESSIONS
4797 /* Parse a repeat expression for cons. This is used by the MIPS
4798 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4799 object file COUNT times.
4801 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4804 parse_repeat_cons (expressionS *exp, unsigned int nbytes)
4811 if (*input_line_pointer != ':')
4813 /* No repeat count. */
4817 ++input_line_pointer;
4818 expression (&count);
4819 if (count.X_op != O_constant
4820 || count.X_add_number <= 0)
4822 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4826 /* The cons function is going to output this expression once. So we
4827 output it count - 1 times. */
4828 for (i = count.X_add_number - 1; i > 0; i--)
4829 emit_expr (exp, nbytes);
4832 #endif /* REPEAT_CONS_EXPRESSIONS */
4834 /* Parse a floating point number represented as a hex constant. This
4835 permits users to specify the exact bits they want in the floating
4839 hex_float (int float_type, char *bytes)
4871 as_bad (_("unknown floating type type '%c'"), float_type);
4875 /* It would be nice if we could go through expression to parse the
4876 hex constant, but if we get a bignum it's a pain to sort it into
4877 the buffer correctly. */
4879 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
4883 /* The MRI assembler accepts arbitrary underscores strewn about
4884 through the hex constant, so we ignore them as well. */
4885 if (*input_line_pointer == '_')
4887 ++input_line_pointer;
4893 as_warn (_("floating point constant too large"));
4896 d = hex_value (*input_line_pointer) << 4;
4897 ++input_line_pointer;
4898 while (*input_line_pointer == '_')
4899 ++input_line_pointer;
4900 if (hex_p (*input_line_pointer))
4902 d += hex_value (*input_line_pointer);
4903 ++input_line_pointer;
4905 if (target_big_endian)
4908 bytes[length - i - 1] = d;
4914 if (target_big_endian)
4915 memset (bytes + i, 0, length - i);
4917 memset (bytes, 0, length - i);
4925 CONStruct some more frag chars of .floats .ffloats etc.
4926 Makes 0 or more new frags.
4927 If need_pass_2 == 1, no frags are emitted.
4928 This understands only floating literals, not expressions. Sorry.
4930 A floating constant is defined by atof_generic(), except it is preceded
4931 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4932 reading, I decided to be incompatible. This always tries to give you
4933 rounded bits to the precision of the pseudo-op. Former AS did premature
4934 truncation, restored noisy bits instead of trailing 0s AND gave you
4935 a choice of 2 flavours of noise according to which of 2 floating-point
4936 scanners you directed AS to use.
4938 In: input_line_pointer->whitespace before, or '0' of flonum. */
4941 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4942 int float_type /* 'f':.ffloat ... 'F':.float ... */)
4945 int length; /* Number of chars in an object. */
4946 const char *err; /* Error from scanning floating literal. */
4947 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
4949 if (is_it_end_of_statement ())
4951 demand_empty_rest_of_line ();
4955 if (now_seg == absolute_section)
4957 as_bad (_("attempt to store float in absolute section"));
4958 ignore_rest_of_line ();
4964 as_bad (_("attempt to store float in section `%s'"),
4965 segment_name (now_seg));
4966 ignore_rest_of_line ();
4970 #ifdef md_flush_pending_output
4971 md_flush_pending_output ();
4974 #ifdef md_cons_align
4980 /* input_line_pointer->1st char of a flonum (we hope!). */
4983 /* Skip any 0{letter} that may be present. Don't even check if the
4984 letter is legal. Someone may invent a "z" format and this routine
4985 has no use for such information. Lusers beware: you get
4986 diagnostics if your input is ill-conditioned. */
4987 if (input_line_pointer[0] == '0'
4988 && ISALPHA (input_line_pointer[1]))
4989 input_line_pointer += 2;
4991 /* Accept :xxxx, where the x's are hex digits, for a floating
4992 point with the exact digits specified. */
4993 if (input_line_pointer[0] == ':')
4995 ++input_line_pointer;
4996 length = hex_float (float_type, temp);
4999 ignore_rest_of_line ();
5005 err = md_atof (float_type, temp, &length);
5006 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
5007 know (err != NULL || length > 0);
5010 as_bad (_("bad floating literal: %s"), err);
5011 ignore_rest_of_line ();
5022 #ifdef REPEAT_CONS_EXPRESSIONS
5023 if (*input_line_pointer == ':')
5025 expressionS count_exp;
5027 ++input_line_pointer;
5028 expression (&count_exp);
5030 if (count_exp.X_op != O_constant
5031 || count_exp.X_add_number <= 0)
5032 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
5034 count = count_exp.X_add_number;
5038 while (--count >= 0)
5040 p = frag_more (length);
5041 memcpy (p, temp, (unsigned int) length);
5046 while (*input_line_pointer++ == ',');
5048 /* Put terminator back into stream. */
5049 --input_line_pointer;
5050 demand_empty_rest_of_line ();
5055 Note - we are using the DWARF standard's definition of LEB128 encoding
5056 where each 7-bit value is a stored in a byte, *not* an octet. This
5057 means that on targets where a byte contains multiple octets there is
5058 a *huge waste of space*. (This also means that we do not have to
5059 have special versions of these functions for when OCTETS_PER_BYTE_POWER
5062 If the 7-bit values were to be packed into N-bit bytes (where N > 8)
5063 we would then have to consider whether multiple, successive LEB128
5064 values should be packed into the bytes without padding (bad idea) or
5065 whether each LEB128 number is padded out to a whole number of bytes.
5066 Plus you have to decide on the endianness of packing octets into a
5069 /* Return the size of a LEB128 value in bytes. */
5071 static inline unsigned int
5072 sizeof_sleb128 (offsetT value)
5079 byte = (value & 0x7f);
5080 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
5081 Fortunately, we can structure things so that the extra work reduces
5082 to a noop on systems that do things "properly". */
5083 value = (value >> 7) | ~(-(offsetT)1 >> 7);
5086 while (!(((value == 0) && ((byte & 0x40) == 0))
5087 || ((value == -1) && ((byte & 0x40) != 0))));
5092 static inline unsigned int
5093 sizeof_uleb128 (valueT value)
5108 sizeof_leb128 (valueT value, int sign)
5111 return sizeof_sleb128 ((offsetT) value);
5113 return sizeof_uleb128 (value);
5116 /* Output a LEB128 value. Returns the number of bytes used. */
5118 static inline unsigned int
5119 output_sleb128 (char *p, offsetT value)
5126 unsigned byte = (value & 0x7f);
5128 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
5129 Fortunately, we can structure things so that the extra work reduces
5130 to a noop on systems that do things "properly". */
5131 value = (value >> 7) | ~(-(offsetT)1 >> 7);
5133 more = !((((value == 0) && ((byte & 0x40) == 0))
5134 || ((value == -1) && ((byte & 0x40) != 0))));
5145 static inline unsigned int
5146 output_uleb128 (char *p, valueT value)
5152 unsigned byte = (value & 0x7f);
5156 /* More bytes to follow. */
5167 output_leb128 (char *p, valueT value, int sign)
5170 return output_sleb128 (p, (offsetT) value);
5172 return output_uleb128 (p, value);
5175 /* Do the same for bignums. We combine sizeof with output here in that
5176 we don't output for NULL values of P. It isn't really as critical as
5177 for "normal" values that this be streamlined. Returns the number of
5180 static inline unsigned int
5181 output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, unsigned int size)
5188 /* Strip leading sign extensions off the bignum. */
5190 && bignum[size - 1] == LITTLENUM_MASK
5191 && bignum[size - 2] > LITTLENUM_MASK / 2)
5196 /* OR in the next part of the littlenum. */
5197 val |= (*bignum << loaded);
5198 loaded += LITTLENUM_NUMBER_OF_BITS;
5202 /* Add bytes until there are less than 7 bits left in VAL
5203 or until every non-sign bit has been written. */
5210 || val != ((byte & 0x40) == 0 ? 0 : ((valueT) 1 << loaded) - 1))
5217 while ((byte & 0x80) != 0 && loaded >= 7);
5221 /* Mop up any left-over bits (of which there will be less than 7). */
5222 if ((byte & 0x80) != 0)
5224 /* Sign-extend VAL. */
5225 if (val & (1 << (loaded - 1)))
5226 val |= ~0U << loaded;
5235 static inline unsigned int
5236 output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, unsigned int size)
5243 /* Strip leading zeros off the bignum. */
5244 /* XXX: Is this needed? */
5245 while (size > 0 && bignum[size - 1] == 0)
5250 if (loaded < 7 && size > 0)
5252 val |= (*bignum << loaded);
5253 loaded += 8 * CHARS_PER_LITTLENUM;
5262 if (size > 0 || val)
5269 while (byte & 0x80);
5275 output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, unsigned int size, int sign)
5278 return output_big_sleb128 (p, bignum, size);
5280 return output_big_uleb128 (p, bignum, size);
5283 /* Generate the appropriate fragments for a given expression to emit a
5284 leb128 value. SIGN is 1 for sleb, 0 for uleb. */
5287 emit_leb128_expr (expressionS *exp, int sign)
5289 operatorT op = exp->X_op;
5290 unsigned int nbytes;
5292 if (op == O_absent || op == O_illegal)
5294 as_warn (_("zero assumed for missing expression"));
5295 exp->X_add_number = 0;
5298 else if (op == O_big && exp->X_add_number <= 0)
5300 as_bad (_("floating point number invalid"));
5301 exp->X_add_number = 0;
5304 else if (op == O_register)
5306 as_warn (_("register value used as expression"));
5309 else if (op == O_constant
5311 && (exp->X_add_number < 0) == !exp->X_extrabit)
5313 /* We're outputting a signed leb128 and the sign of X_add_number
5314 doesn't reflect the sign of the original value. Convert EXP
5315 to a correctly-extended bignum instead. */
5316 convert_to_bignum (exp, exp->X_extrabit);
5320 if (now_seg == absolute_section)
5322 if (op != O_constant || exp->X_add_number != 0)
5323 as_bad (_("attempt to store value in absolute section"));
5324 abs_section_offset++;
5328 if ((op != O_constant || exp->X_add_number != 0) && in_bss ())
5329 as_bad (_("attempt to store non-zero value in section `%s'"),
5330 segment_name (now_seg));
5332 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
5333 a signal that this is leb128 data. It shouldn't optimize this away. */
5334 nbytes = (unsigned int) -1;
5335 if (check_eh_frame (exp, &nbytes))
5338 /* Let the backend know that subsequent data may be byte aligned. */
5339 #ifdef md_cons_align
5343 if (op == O_constant)
5345 /* If we've got a constant, emit the thing directly right now. */
5347 valueT value = exp->X_add_number;
5351 size = sizeof_leb128 (value, sign);
5352 p = frag_more (size);
5353 if (output_leb128 (p, value, sign) > size)
5356 else if (op == O_big)
5358 /* O_big is a different sort of constant. */
5359 int nbr_digits = exp->X_add_number;
5363 /* If the leading littenum is 0xffff, prepend a 0 to avoid confusion with
5364 a signed number. Unary operators like - or ~ always extend the
5365 bignum to its largest size. */
5367 && nbr_digits < SIZE_OF_LARGE_NUMBER
5368 && generic_bignum[nbr_digits - 1] == LITTLENUM_MASK)
5369 generic_bignum[nbr_digits++] = 0;
5371 size = output_big_leb128 (NULL, generic_bignum, nbr_digits, sign);
5372 p = frag_more (size);
5373 if (output_big_leb128 (p, generic_bignum, nbr_digits, sign) > size)
5378 /* Otherwise, we have to create a variable sized fragment and
5379 resolve things later. */
5381 frag_var (rs_leb128, sizeof_uleb128 (~(valueT) 0), 0, sign,
5382 make_expr_symbol (exp), 0, (char *) NULL);
5386 /* Parse the .sleb128 and .uleb128 pseudos. */
5393 #ifdef md_flush_pending_output
5394 md_flush_pending_output ();
5399 deferred_expression (&exp);
5400 emit_leb128_expr (&exp, sign);
5402 while (*input_line_pointer++ == ',');
5404 input_line_pointer--;
5405 demand_empty_rest_of_line ();
5409 stringer_append_char (int c, int bitsize)
5412 as_bad (_("attempt to store non-empty string in section `%s'"),
5413 segment_name (now_seg));
5415 if (!target_big_endian)
5416 FRAG_APPEND_1_CHAR (c);
5421 FRAG_APPEND_1_CHAR (0);
5422 FRAG_APPEND_1_CHAR (0);
5423 FRAG_APPEND_1_CHAR (0);
5424 FRAG_APPEND_1_CHAR (0);
5427 FRAG_APPEND_1_CHAR (0);
5428 FRAG_APPEND_1_CHAR (0);
5431 FRAG_APPEND_1_CHAR (0);
5436 /* Called with invalid bitsize argument. */
5440 if (target_big_endian)
5441 FRAG_APPEND_1_CHAR (c);
5444 /* Worker to do .ascii etc statements.
5445 Reads 0 or more ',' separated, double-quoted strings.
5446 Caller should have checked need_pass_2 is FALSE because we don't
5448 Checks for end-of-line.
5449 BITS_APPENDZERO says how many bits are in a target char.
5450 The bottom bit is set if a NUL char should be appended to the strings. */
5453 stringer (int bits_appendzero)
5455 const int bitsize = bits_appendzero & ~7;
5456 const int append_zero = bits_appendzero & 1;
5458 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5462 #ifdef md_flush_pending_output
5463 md_flush_pending_output ();
5466 #ifdef md_cons_align
5470 /* If we have been switched into the abs_section then we
5471 will not have an obstack onto which we can hang strings. */
5472 if (now_seg == absolute_section)
5474 as_bad (_("strings must be placed into a section"));
5475 ignore_rest_of_line ();
5479 /* The following awkward logic is to parse ZERO or more strings,
5480 comma separated. Recall a string expression includes spaces
5481 before the opening '\"' and spaces after the closing '\"'.
5482 We fake a leading ',' if there is (supposed to be)
5483 a 1st, expression. We keep demanding expressions for each ','. */
5484 if (is_it_end_of_statement ())
5486 c = 0; /* Skip loop. */
5487 ++input_line_pointer; /* Compensate for end of loop. */
5491 c = ','; /* Do loop. */
5494 while (c == ',' || c == '<' || c == '"')
5497 switch (*input_line_pointer)
5500 ++input_line_pointer; /*->1st char of string. */
5501 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5502 start = input_line_pointer;
5505 while (is_a_char (c = next_char_of_string ()))
5506 stringer_append_char (c, bitsize);
5509 stringer_append_char (0, bitsize);
5511 know (input_line_pointer[-1] == '\"');
5513 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5514 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
5515 will emit .string with a filename in the .debug section
5516 after a sequence of constants. See the comment in
5517 emit_expr for the sequence. emit_expr will set
5518 dwarf_file_string to non-zero if this string might be a
5519 source file name. */
5520 if (strcmp (segment_name (now_seg), ".debug") != 0)
5521 dwarf_file_string = 0;
5522 else if (dwarf_file_string)
5524 c = input_line_pointer[-1];
5525 input_line_pointer[-1] = '\0';
5526 listing_source_file (start);
5527 input_line_pointer[-1] = c;
5533 input_line_pointer++;
5534 c = get_single_number ();
5535 stringer_append_char (c, bitsize);
5536 if (*input_line_pointer != '>')
5537 as_bad (_("expected <nn>"));
5539 input_line_pointer++;
5542 input_line_pointer++;
5546 c = *input_line_pointer;
5549 demand_empty_rest_of_line ();
5552 /* FIXME-SOMEDAY: I had trouble here on characters with the
5553 high bits set. We'll probably also have trouble with
5554 multibyte chars, wide chars, etc. Also be careful about
5555 returning values bigger than 1 byte. xoxorich. */
5558 next_char_of_string (void)
5562 c = *input_line_pointer++ & CHAR_MASK;
5566 /* PR 20902: Do not advance past the end of the buffer. */
5567 -- input_line_pointer;
5576 as_warn (_("unterminated string; newline inserted"));
5577 bump_line_counters ();
5580 #ifndef NO_STRING_ESCAPES
5582 switch (c = *input_line_pointer++ & CHAR_MASK)
5610 break; /* As itself. */
5626 for (i = 0, number = 0;
5627 ISDIGIT (c) && i < 3;
5628 c = *input_line_pointer++, i++)
5630 number = number * 8 + c - '0';
5633 c = number & CHAR_MASK;
5635 --input_line_pointer;
5644 c = *input_line_pointer++;
5645 while (ISXDIGIT (c))
5648 number = number * 16 + c - '0';
5649 else if (ISUPPER (c))
5650 number = number * 16 + c - 'A' + 10;
5652 number = number * 16 + c - 'a' + 10;
5653 c = *input_line_pointer++;
5655 c = number & CHAR_MASK;
5656 --input_line_pointer;
5661 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
5662 as_warn (_("unterminated string; newline inserted"));
5664 bump_line_counters ();
5668 /* Do not advance past the end of the buffer. */
5669 -- input_line_pointer;
5675 #ifdef ONLY_STANDARD_ESCAPES
5676 as_bad (_("bad escaped character in string"));
5678 #endif /* ONLY_STANDARD_ESCAPES */
5683 #endif /* ! defined (NO_STRING_ESCAPES) */
5692 get_segmented_expression (expressionS *expP)
5696 retval = expression (expP);
5697 if (expP->X_op == O_illegal
5698 || expP->X_op == O_absent
5699 || expP->X_op == O_big)
5701 as_bad (_("expected address expression"));
5702 expP->X_op = O_constant;
5703 expP->X_add_number = 0;
5704 retval = absolute_section;
5710 get_known_segmented_expression (expressionS *expP)
5712 segT retval = get_segmented_expression (expP);
5714 if (retval == undefined_section)
5716 /* There is no easy way to extract the undefined symbol from the
5718 if (expP->X_add_symbol != NULL
5719 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
5720 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5721 S_GET_NAME (expP->X_add_symbol));
5723 as_warn (_("some symbol undefined; zero assumed"));
5724 retval = absolute_section;
5725 expP->X_op = O_constant;
5726 expP->X_add_number = 0;
5731 char /* Return terminator. */
5732 get_absolute_expression_and_terminator (long *val_pointer /* Return value of expression. */)
5734 /* FIXME: val_pointer should probably be offsetT *. */
5735 *val_pointer = (long) get_absolute_expression ();
5736 return (*input_line_pointer++);
5739 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
5740 Give a warning if that happens. */
5743 demand_copy_C_string (int *len_pointer)
5747 if ((s = demand_copy_string (len_pointer)) != 0)
5751 for (len = *len_pointer; len > 0; len--)
5758 as_bad (_("this string may not contain \'\\0\'"));
5766 /* Demand string, but return a safe (=private) copy of the string.
5767 Return NULL if we can't read a string here. */
5770 demand_copy_string (int *lenP)
5778 if (*input_line_pointer == '\"')
5780 input_line_pointer++; /* Skip opening quote. */
5782 while (is_a_char (c = next_char_of_string ()))
5784 obstack_1grow (¬es, c);
5787 /* JF this next line is so demand_copy_C_string will return a
5788 null terminated string. */
5789 obstack_1grow (¬es, '\0');
5790 retval = (char *) obstack_finish (¬es);
5794 as_bad (_("missing string"));
5796 ignore_rest_of_line ();
5802 /* In: Input_line_pointer->next character.
5804 Do: Skip input_line_pointer over all whitespace.
5806 Out: 1 if input_line_pointer->end-of-line. */
5809 is_it_end_of_statement (void)
5812 return (is_end_of_line[(unsigned char) *input_line_pointer]);
5816 equals (char *sym_name, int reassign)
5821 input_line_pointer++;
5822 if (*input_line_pointer == '=')
5823 input_line_pointer++;
5824 if (reassign < 0 && *input_line_pointer == '=')
5825 input_line_pointer++;
5827 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
5828 input_line_pointer++;
5831 stop = mri_comment_field (&stopc);
5833 assign_symbol (sym_name, reassign >= 0 ? !reassign : reassign);
5837 demand_empty_rest_of_line ();
5838 mri_comment_end (stop, stopc);
5842 /* .incbin -- include a file verbatim at the current location. */
5845 s_incbin (int x ATTRIBUTE_UNUSED)
5856 #ifdef md_flush_pending_output
5857 md_flush_pending_output ();
5860 #ifdef md_cons_align
5865 filename = demand_copy_string (& len);
5866 if (filename == NULL)
5871 /* Look for optional skip and count. */
5872 if (* input_line_pointer == ',')
5874 ++ input_line_pointer;
5875 skip = get_absolute_expression ();
5879 if (* input_line_pointer == ',')
5881 ++ input_line_pointer;
5883 count = get_absolute_expression ();
5885 as_warn (_(".incbin count zero, ignoring `%s'"), filename);
5891 demand_empty_rest_of_line ();
5893 /* Try opening absolute path first, then try include dirs. */
5894 binfile = fopen (filename, FOPEN_RB);
5895 if (binfile == NULL)
5899 path = XNEWVEC (char, (unsigned long) len + include_dir_maxlen + 5);
5901 for (i = 0; i < include_dir_count; i++)
5903 sprintf (path, "%s/%s", include_dirs[i], filename);
5905 binfile = fopen (path, FOPEN_RB);
5906 if (binfile != NULL)
5910 if (binfile == NULL)
5911 as_bad (_("file not found: %s"), filename);
5914 path = xstrdup (filename);
5920 register_dependency (path);
5922 /* Compute the length of the file. */
5923 if (fseek (binfile, 0, SEEK_END) != 0)
5925 as_bad (_("seek to end of .incbin file failed `%s'"), path);
5928 file_len = ftell (binfile);
5930 /* If a count was not specified use the remainder of the file. */
5932 count = file_len - skip;
5934 if (skip < 0 || count < 0 || file_len < 0 || skip + count > file_len)
5936 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5937 skip, count, file_len);
5941 if (fseek (binfile, skip, SEEK_SET) != 0)
5943 as_bad (_("could not skip to %ld in file `%s'"), skip, path);
5947 /* Allocate frag space and store file contents in it. */
5948 binfrag = frag_more (count);
5950 bytes = fread (binfrag, 1, count, binfile);
5952 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5953 path, bytes, count);
5956 if (binfile != NULL)
5962 /* .include -- include a file at this point. */
5965 s_include (int arg ATTRIBUTE_UNUSED)
5974 filename = demand_copy_string (&i);
5975 if (filename == NULL)
5977 /* demand_copy_string has already printed an error and
5978 called ignore_rest_of_line. */
5986 while (!is_end_of_line[(unsigned char) *input_line_pointer]
5987 && *input_line_pointer != ' '
5988 && *input_line_pointer != '\t')
5990 obstack_1grow (¬es, *input_line_pointer);
5991 ++input_line_pointer;
5995 obstack_1grow (¬es, '\0');
5996 filename = (char *) obstack_finish (¬es);
5997 while (!is_end_of_line[(unsigned char) *input_line_pointer])
5998 ++input_line_pointer;
6001 demand_empty_rest_of_line ();
6002 path = XNEWVEC (char, (unsigned long) i
6003 + include_dir_maxlen + 5 /* slop */ );
6005 for (i = 0; i < include_dir_count; i++)
6007 strcpy (path, include_dirs[i]);
6009 strcat (path, filename);
6010 if (0 != (try_file = fopen (path, FOPEN_RT)))
6020 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
6021 register_dependency (path);
6022 input_scrub_insert_file (path);
6026 add_include_dir (char *path)
6030 if (include_dir_count == 0)
6032 include_dirs = XNEWVEC (const char *, 2);
6033 include_dirs[0] = "."; /* Current dir. */
6034 include_dir_count = 2;
6038 include_dir_count++;
6039 include_dirs = XRESIZEVEC (const char *, include_dirs,
6043 include_dirs[include_dir_count - 1] = path; /* New one. */
6046 if (i > include_dir_maxlen)
6047 include_dir_maxlen = i;
6050 /* Output debugging information to denote the source file. */
6053 generate_file_debug (void)
6055 if (debug_type == DEBUG_STABS)
6056 stabs_generate_asm_file ();
6059 /* Output line number debugging information for the current source line. */
6062 generate_lineno_debug (void)
6066 case DEBUG_UNSPECIFIED:
6071 stabs_generate_asm_lineno ();
6074 ecoff_generate_asm_lineno ();
6077 /* ??? We could here indicate to dwarf2dbg.c that something
6078 has changed. However, since there is additional backend
6079 support that is required (calling dwarf2_emit_insn), we
6080 let dwarf2dbg.c call as_where on its own. */
6085 /* Output debugging information to mark a function entry point or end point.
6086 END_P is zero for .func, and non-zero for .endfunc. */
6091 do_s_func (end_p, NULL);
6094 /* Subroutine of s_func so targets can choose a different default prefix.
6095 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
6098 do_s_func (int end_p, const char *default_prefix)
6100 /* Record the current function so that we can issue an error message for
6101 misplaced .func,.endfunc, and also so that .endfunc needs no
6103 static char *current_name;
6104 static char *current_label;
6108 if (current_name == NULL)
6110 as_bad (_("missing .func"));
6111 ignore_rest_of_line ();
6115 if (debug_type == DEBUG_STABS)
6116 stabs_generate_asm_endfunc (current_name, current_label);
6118 current_name = current_label = NULL;
6123 char delim1, delim2;
6125 if (current_name != NULL)
6127 as_bad (_(".endfunc missing for previous .func"));
6128 ignore_rest_of_line ();
6132 delim1 = get_symbol_name (& name);
6133 name = xstrdup (name);
6134 *input_line_pointer = delim1;
6135 SKIP_WHITESPACE_AFTER_NAME ();
6136 if (*input_line_pointer != ',')
6140 if (asprintf (&label, "%s%s", default_prefix, name) == -1)
6141 as_fatal ("%s", xstrerror (errno));
6145 char leading_char = bfd_get_symbol_leading_char (stdoutput);
6146 /* Missing entry point, use function's name with the leading
6150 if (asprintf (&label, "%c%s", leading_char, name) == -1)
6151 as_fatal ("%s", xstrerror (errno));
6159 ++input_line_pointer;
6161 delim2 = get_symbol_name (& label);
6162 label = xstrdup (label);
6163 restore_line_pointer (delim2);
6166 if (debug_type == DEBUG_STABS)
6167 stabs_generate_asm_func (name, label);
6169 current_name = name;
6170 current_label = label;
6173 demand_empty_rest_of_line ();
6176 #ifdef HANDLE_BUNDLE
6179 s_bundle_align_mode (int arg ATTRIBUTE_UNUSED)
6181 unsigned int align = get_absolute_expression ();
6183 demand_empty_rest_of_line ();
6185 if (align > (unsigned int) TC_ALIGN_LIMIT)
6186 as_fatal (_(".bundle_align_mode alignment too large (maximum %u)"),
6187 (unsigned int) TC_ALIGN_LIMIT);
6189 if (bundle_lock_frag != NULL)
6191 as_bad (_("cannot change .bundle_align_mode inside .bundle_lock"));
6195 bundle_align_p2 = align;
6199 s_bundle_lock (int arg ATTRIBUTE_UNUSED)
6201 demand_empty_rest_of_line ();
6203 if (bundle_align_p2 == 0)
6205 as_bad (_(".bundle_lock is meaningless without .bundle_align_mode"));
6209 if (bundle_lock_depth == 0)
6211 bundle_lock_frchain = frchain_now;
6212 bundle_lock_frag = start_bundle ();
6214 ++bundle_lock_depth;
6218 s_bundle_unlock (int arg ATTRIBUTE_UNUSED)
6222 demand_empty_rest_of_line ();
6224 if (bundle_lock_frag == NULL)
6226 as_bad (_(".bundle_unlock without preceding .bundle_lock"));
6230 gas_assert (bundle_align_p2 > 0);
6232 gas_assert (bundle_lock_depth > 0);
6233 if (--bundle_lock_depth > 0)
6236 size = pending_bundle_size (bundle_lock_frag);
6238 if (size > (1U << bundle_align_p2))
6239 as_bad (_(".bundle_lock sequence is %u bytes, but bundle size only %u"),
6240 size, 1 << bundle_align_p2);
6242 finish_bundle (bundle_lock_frag, size);
6244 bundle_lock_frag = NULL;
6245 bundle_lock_frchain = NULL;
6248 #endif /* HANDLE_BUNDLE */
6251 s_ignore (int arg ATTRIBUTE_UNUSED)
6253 ignore_rest_of_line ();
6257 read_print_statistics (FILE *file)
6259 hash_print_statistics (file, "pseudo-op table", po_hash);
6262 /* Inserts the given line into the input stream.
6264 This call avoids macro/conditionals nesting checking, since the contents of
6265 the line are assumed to replace the contents of a line already scanned.
6267 An appropriate use of this function would be substitution of input lines when
6268 called by md_start_line_hook(). The given line is assumed to already be
6269 properly scrubbed. */
6272 input_scrub_insert_line (const char *line)
6275 size_t len = strlen (line);
6276 sb_build (&newline, len);
6277 sb_add_buffer (&newline, line, len);
6278 input_scrub_include_sb (&newline, input_line_pointer, 0);
6280 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
6283 /* Insert a file into the input stream; the path must resolve to an actual
6284 file; no include path searching or dependency registering is performed. */
6287 input_scrub_insert_file (char *path)
6289 input_scrub_include_file (path, input_line_pointer);
6290 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
6293 /* Find the end of a line, considering quotation and escaping of quotes. */
6295 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
6296 # define TC_SINGLE_QUOTE_STRINGS 1
6300 _find_end_of_line (char *s, int mri_string, int insn ATTRIBUTE_UNUSED,
6303 char inquote = '\0';
6306 while (!is_end_of_line[(unsigned char) *s]
6307 || (inquote && !ISCNTRL (*s))
6308 || (inquote == '\'' && flag_mri)
6309 #ifdef TC_EOL_IN_INSN
6310 || (insn && TC_EOL_IN_INSN (s))
6312 /* PR 6926: When we are parsing the body of a macro the sequence
6313 \@ is special - it refers to the invocation count. If the @
6314 character happens to be registered as a line-separator character
6315 by the target, then the is_end_of_line[] test above will have
6316 returned true, but we need to ignore the line separating
6317 semantics in this particular case. */
6318 || (in_macro && inescape && *s == '@')
6321 if (mri_string && *s == '\'')
6325 else if (*s == '\\')
6329 #ifdef TC_SINGLE_QUOTE_STRINGS
6330 || (TC_SINGLE_QUOTE_STRINGS && *s == '\'')
6337 as_warn (_("missing closing `%c'"), inquote);
6338 if (inescape && !ignore_input ())
6339 as_warn (_("stray `\\'"));
6344 find_end_of_line (char *s, int mri_string)
6346 return _find_end_of_line (s, mri_string, 0, 0);
6349 static char *saved_ilp = NULL;
6350 static char *saved_limit;
6352 /* Use BUF as a temporary input pointer for calling other functions in this
6353 file. BUF must be a C string, so that its end can be found by strlen.
6354 Also sets the buffer_limit variable (local to this file) so that buffer
6355 overruns should not occur. Saves the current input line pointer so that
6356 it can be restored by calling restore_ilp().
6358 Does not support recursion.
6360 FIXME: This function is currently only used by stabs.c but that
6361 should be extended to other files in the gas source directory. */
6364 temp_ilp (char *buf)
6366 gas_assert (saved_ilp == NULL);
6367 gas_assert (buf != NULL);
6369 saved_ilp = input_line_pointer;
6370 saved_limit = buffer_limit;
6371 /* Prevent the assert in restore_ilp from triggering if
6372 the input_line_pointer has not yet been initialised. */
6373 if (saved_ilp == NULL)
6374 saved_limit = saved_ilp = (char *) "";
6376 input_line_pointer = buf;
6377 buffer_limit = buf + strlen (buf);
6380 /* Restore a saved input line pointer. */
6385 gas_assert (saved_ilp != NULL);
6387 input_line_pointer = saved_ilp;
6388 buffer_limit = saved_limit;