1 /* read.c - read a source file -
2 Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
3 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
4 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
23 /* If your chars aren't 8 bits, you will change this a bit (eg. to 0xFF).
24 But then, GNU isn't spozed to run on your machine anyway.
25 (RMS is so shortsighted sometimes.) */
26 #define MASK_CHAR ((int)(unsigned char) -1)
28 /* This is the largest known floating point format (for now). It will
29 grow when we do 4361 style flonums. */
30 #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
32 /* Routines that read assembler source text to build spaghetti in memory.
33 Another group of these functions is in the expr.c module. */
36 #include "safe-ctype.h"
43 #include "dw2gencfi.h"
45 #ifndef TC_START_LABEL
46 #define TC_START_LABEL(x,y) (x == ':')
49 /* Set by the object-format or the target. */
50 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
51 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
56 else if ((SIZE) >= 4) \
58 else if ((SIZE) >= 2) \
66 char *input_line_pointer; /*->next char of source file to parse. */
68 #if BITS_PER_CHAR != 8
69 /* The following table is indexed by[(char)] and will break if
70 a char does not have exactly 256 states (hopefully 0:255!)! */
79 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
84 /* The Delta 68k assembler permits % inside label names. */
89 /* The PowerPC Windows NT assemblers permits ? inside label names. */
94 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
95 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
104 /* The Delta 68k assembler permits ~ at start of label names. */
108 /* Used by is_... macros. our ctype[]. */
109 char lex_type[256] = {
110 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
111 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
112 0, 0, 0, LEX_HASH, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
113 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
114 LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
115 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
116 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
117 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */
118 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
119 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
120 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
121 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
122 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
123 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
124 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
125 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
129 Out: 1 if this character ends a line. */
130 char is_end_of_line[256] = {
132 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
134 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
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, /* _!"#$%&'()*+,-./ */
138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
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, /* */
150 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
153 #ifndef TC_CASE_SENSITIVE
154 char original_case_string[128];
157 /* Functions private to this file. */
159 static char *buffer; /* 1st char of each buffer of lines is here. */
160 static char *buffer_limit; /*->1 + last char in buffer. */
162 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
163 in the tc-<CPU>.h file. See the "Porting GAS" section of the
165 int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
167 /* Variables for handling include file directory table. */
169 /* Table of pointers to directories to search for .include's. */
172 /* How many are in the table. */
173 int include_dir_count;
175 /* Length of longest in table. */
176 int include_dir_maxlen = 1;
178 #ifndef WORKING_DOT_WORD
179 struct broken_word *broken_words;
180 int new_broken_words;
183 /* The current offset into the absolute section. We don't try to
184 build frags in the absolute section, since no data can be stored
185 there. We just keep track of the current offset. */
186 addressT abs_section_offset;
188 /* If this line had an MRI style label, it is stored in this variable.
189 This is used by some of the MRI pseudo-ops. */
192 /* This global variable is used to support MRI common sections. We
193 translate such sections into a common symbol. This variable is
194 non-NULL when we are in an MRI common section. */
195 symbolS *mri_common_symbol;
197 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
198 need to align to an even byte boundary unless the next pseudo-op is
199 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
201 static int mri_pending_align;
205 /* This variable is set to be non-zero if the next string we see might
206 be the name of the source file in DWARF debugging information. See
207 the comment in emit_expr for the format we look for. */
208 static int dwarf_file_string;
212 static void do_s_func (int end_p, const char *default_prefix);
213 static void do_align (int, char *, int, int);
214 static void s_align (int, int);
215 static void s_altmacro (int);
216 static void s_bad_end (int);
217 static int hex_float (int, char *);
218 static segT get_known_segmented_expression (expressionS * expP);
219 static void pobegin (void);
220 static int get_line_sb (sb *);
221 static void generate_file_debug (void);
222 static char *_find_end_of_line (char *, int, int);
230 obj_read_begin_hook ();
232 /* Something close -- but not too close -- to a multiple of 1024.
233 The debugging malloc I'm using has 24 bytes of overhead. */
234 obstack_begin (¬es, chunksize);
235 obstack_begin (&cond_obstack, chunksize);
237 /* Use machine dependent syntax. */
238 for (p = line_separator_chars; *p; p++)
239 is_end_of_line[(unsigned char) *p] = 1;
240 /* Use more. FIXME-SOMEDAY. */
246 #ifndef TC_ADDRESS_BYTES
247 #define TC_ADDRESS_BYTES address_bytes
252 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
253 contain an address. */
254 int n = (stdoutput->arch_info->bits_per_address - 1) / 8;
262 /* Set up pseudo-op tables. */
264 static struct hash_control *po_hash;
266 static const pseudo_typeS potable[] = {
267 {"abort", s_abort, 0},
268 {"align", s_align_ptwo, 0},
269 {"altmacro", s_altmacro, 1},
270 {"ascii", stringer, 0},
271 {"asciz", stringer, 1},
272 {"balign", s_align_bytes, 0},
273 {"balignw", s_align_bytes, -2},
274 {"balignl", s_align_bytes, -4},
278 {"common", s_mri_common, 0},
279 {"common.s", s_mri_common, 1},
282 #ifdef TC_ADDRESS_BYTES
286 {"dc.d", float_cons, 'd'},
288 {"dc.s", float_cons, 'f'},
290 {"dc.x", float_cons, 'x'},
292 {"dcb.b", s_space, 1},
293 {"dcb.d", s_float_space, 'd'},
294 {"dcb.l", s_space, 4},
295 {"dcb.s", s_float_space, 'f'},
296 {"dcb.w", s_space, 2},
297 {"dcb.x", s_float_space, 'x'},
299 {"ds.b", s_space, 1},
300 {"ds.d", s_space, 8},
301 {"ds.l", s_space, 4},
302 {"ds.p", s_space, 12},
303 {"ds.s", s_space, 4},
304 {"ds.w", s_space, 2},
305 {"ds.x", s_space, 12},
306 {"debug", s_ignore, 0},
311 {"double", float_cons, 'd'},
313 {"eject", listing_eject, 0}, /* Formfeed listing. */
315 {"elsec", s_else, 0},
316 {"elseif", s_elseif, (int) O_ne},
318 {"endc", s_endif, 0},
319 {"endfunc", s_func, 1},
320 {"endif", s_endif, 0},
321 {"endm", s_bad_end, 0},
322 {"endr", s_bad_end, 1},
328 {"error", s_errwarn, 1},
329 {"exitm", s_mexit, 0},
331 {"extern", s_ignore, 0}, /* We treat all undef as ext. */
332 {"appfile", s_app_file, 1},
333 {"appline", s_app_line, 0},
335 {"file", s_app_file, 0},
337 {"float", float_cons, 'f'},
338 {"format", s_ignore, 0},
340 {"global", s_globl, 0},
341 {"globl", s_globl, 0},
343 {"if", s_if, (int) O_ne},
346 {"ifdef", s_ifdef, 0},
347 {"ifeq", s_if, (int) O_eq},
348 {"ifeqs", s_ifeqs, 0},
349 {"ifge", s_if, (int) O_ge},
350 {"ifgt", s_if, (int) O_gt},
351 {"ifle", s_if, (int) O_le},
352 {"iflt", s_if, (int) O_lt},
355 {"ifndef", s_ifdef, 1},
356 {"ifne", s_if, (int) O_ne},
357 {"ifnes", s_ifeqs, 1},
358 {"ifnotdef", s_ifdef, 1},
359 {"incbin", s_incbin, 0},
360 {"include", s_include, 0},
366 {"lcomm", s_lcomm, 0},
367 {"lflags", listing_flags, 0}, /* Listing flags. */
368 {"linkonce", s_linkonce, 0},
369 {"list", listing_list, 1}, /* Turn listing on. */
370 {"llen", listing_psize, 1},
373 {"macro", s_macro, 0},
374 {"mexit", s_mexit, 0},
376 {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
377 {"name", s_ignore, 0},
378 {"noaltmacro", s_altmacro, 0},
379 {"noformat", s_ignore, 0},
380 {"nolist", listing_list, 0}, /* Turn listing off. */
381 {"nopage", listing_nopage, 0},
383 {"offset", s_struct, 0},
385 {"p2align", s_align_ptwo, 0},
386 {"p2alignw", s_align_ptwo, -2},
387 {"p2alignl", s_align_ptwo, -4},
388 {"page", listing_eject, 0},
389 {"plen", listing_psize, 0},
390 {"print", s_print, 0},
391 {"psize", listing_psize, 0}, /* Set paper size. */
392 {"purgem", s_purgem, 0},
397 {"sbttl", listing_title, 1}, /* Subtitle of listing. */
402 {"single", float_cons, 'f'},
404 {"space", s_space, 0},
405 {"skip", s_space, 0},
406 {"sleb128", s_leb128, 1},
407 {"spc", s_ignore, 0},
408 {"stabd", s_stab, 'd'},
409 {"stabn", s_stab, 'n'},
410 {"stabs", s_stab, 's'},
411 {"string", stringer, 1},
412 {"struct", s_struct, 0},
416 /* This is for gcc to use. It's only just been added (2/94), so gcc
417 won't be able to use it for a while -- probably a year or more.
418 But once this has been released, check with gcc maintainers
419 before deleting it or even changing the spelling. */
420 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
421 /* If we're folding case -- done for some targets, not necessarily
422 all -- the above string in an input file will be converted to
423 this one. Match it either way... */
424 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
426 {"title", listing_title, 0}, /* Listing title. */
427 {"ttl", listing_title, 0},
429 {"uleb128", s_leb128, 0},
433 {"xdef", s_globl, 0},
434 {"xref", s_ignore, 0},
435 {"xstabs", s_xstab, 's'},
436 {"warning", s_errwarn, 0},
437 {"weakref", s_weakref, 0},
439 {"zero", s_space, 0},
440 {NULL, NULL, 0} /* End sentinel. */
444 get_absolute_expr (expressionS *exp)
446 expression_and_evaluate (exp);
447 if (exp->X_op != O_constant)
449 if (exp->X_op != O_absent)
450 as_bad (_("bad or irreducible absolute expression"));
451 exp->X_add_number = 0;
453 return exp->X_add_number;
457 get_absolute_expression (void)
461 return get_absolute_expr (&exp);
464 static int pop_override_ok = 0;
465 static const char *pop_table_name;
468 pop_insert (const pseudo_typeS *table)
471 const pseudo_typeS *pop;
472 for (pop = table; pop->poc_name; pop++)
474 errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
475 if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
476 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name,
481 #ifndef md_pop_insert
482 #define md_pop_insert() pop_insert(md_pseudo_table)
485 #ifndef obj_pop_insert
486 #define obj_pop_insert() pop_insert(obj_pseudo_table)
489 #ifndef cfi_pop_insert
490 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
496 po_hash = hash_new ();
498 /* Do the target-specific pseudo ops. */
499 pop_table_name = "md";
502 /* Now object specific. Skip any that were in the target table. */
503 pop_table_name = "obj";
507 /* Now portable ones. Skip any that we've seen already. */
508 pop_table_name = "standard";
509 pop_insert (potable);
511 #ifdef TARGET_USE_CFIPOP
512 pop_table_name = "cfi";
518 #define HANDLE_CONDITIONAL_ASSEMBLY() \
519 if (ignore_input ()) \
521 char *eol = find_end_of_line (input_line_pointer, flag_m68k_mri); \
522 input_line_pointer = (input_line_pointer <= buffer_limit \
523 && eol >= buffer_limit) \
529 /* This function is used when scrubbing the characters between #APP
532 static char *scrub_string;
533 static char *scrub_string_end;
536 scrub_from_string (char *buf, int buflen)
540 copy = scrub_string_end - scrub_string;
543 memcpy (buf, scrub_string, copy);
544 scrub_string += copy;
548 /* Helper function of read_a_source_file, which tries to expand a macro. */
550 try_macro (char term, const char *line)
556 if (check_macro (line, &out, &err, ¯o))
560 *input_line_pointer++ = term;
561 input_scrub_include_sb (&out,
562 input_line_pointer, 1);
565 input_scrub_next_buffer (&input_line_pointer);
567 md_macro_info (macro);
574 /* We read the file, putting things into a web that represents what we
575 have been reading. */
577 read_a_source_file (char *name)
580 register char *s; /* String of symbol, '\0' appended. */
588 buffer = input_scrub_new_file (name);
591 listing_newline (NULL);
592 register_dependency (name);
594 /* Generate debugging information before we've read anything in to denote
595 this file as the "main" source file and not a subordinate one
596 (e.g. N_SO vs N_SOL in stabs). */
597 generate_file_debug ();
599 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
600 { /* We have another line to parse. */
602 /* In order to avoid listing macro expansion lines with labels
603 multiple times, keep track of which line was last issued. */
604 static char *last_eol;
608 know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */
610 while (input_line_pointer < buffer_limit)
612 /* We have more of this buffer to parse. */
614 /* We now have input_line_pointer->1st char of next line.
615 If input_line_pointer [-1] == '\n' then we just
616 scanned another line: so bump line counters. */
617 if (is_end_of_line[(unsigned char) input_line_pointer[-1]])
619 #ifdef md_start_line_hook
620 md_start_line_hook ();
622 if (input_line_pointer[-1] == '\n')
623 bump_line_counters ();
627 if (LABELS_WITHOUT_COLONS || flag_m68k_mri)
629 /* Text at the start of a line must be a label, we
630 run down and stick a colon in. */
631 if (is_name_beginner (*input_line_pointer))
633 char *line_start = input_line_pointer;
638 HANDLE_CONDITIONAL_ASSEMBLY ();
640 c = get_symbol_end ();
642 /* In MRI mode, the EQU and MACRO pseudoops must
643 be handled specially. */
647 char *rest = input_line_pointer + 1;
651 if (*rest == ' ' || *rest == '\t')
653 if ((strncasecmp (rest, "EQU", 3) == 0
654 || strncasecmp (rest, "SET", 3) == 0)
655 && (rest[3] == ' ' || rest[3] == '\t'))
657 input_line_pointer = rest + 3;
659 strncasecmp (rest, "SET", 3) == 0);
662 if (strncasecmp (rest, "MACRO", 5) == 0
665 || is_end_of_line[(unsigned char) rest[5]]))
669 /* In MRI mode, we need to handle the MACRO
670 pseudo-op specially: we don't want to put the
671 symbol in the symbol table. */
673 #ifdef TC_START_LABEL_WITHOUT_COLON
674 && TC_START_LABEL_WITHOUT_COLON(c,
678 line_label = colon (line_start);
680 line_label = symbol_create (line_start,
685 *input_line_pointer = c;
687 input_line_pointer++;
692 /* We are at the beginning of a line, or similar place.
693 We expect a well-formed assembler statement.
694 A "symbol-name:" is a statement.
696 Depending on what compiler is used, the order of these tests
697 may vary to catch most common case 1st.
698 Each test is independent of all other tests at the (top) level.
699 PLEASE make a compiler that doesn't use this assembler.
700 It is crufty to waste a compiler's time encoding things for this
701 assembler, which then wastes more time decoding it.
702 (And communicating via (linear) files is silly!
703 If you must pass stuff, please pass a tree!) */
704 if ((c = *input_line_pointer++) == '\t'
708 c = *input_line_pointer++;
710 know (c != ' '); /* No further leading whitespace. */
713 /* If listing is on, and we are expanding a macro, then give
714 the listing code the contents of the expanded line. */
717 if ((listing & LISTING_MACEXP) && macro_nest > 0)
722 /* Find the end of the current expanded macro line. */
723 s = find_end_of_line (input_line_pointer - 1, flag_m68k_mri);
728 /* Copy it for safe keeping. Also give an indication of
729 how much macro nesting is involved at this point. */
730 len = s - (input_line_pointer - 1);
731 copy = (char *) xmalloc (len + macro_nest + 2);
732 memset (copy, '>', macro_nest);
733 copy[macro_nest] = ' ';
734 memcpy (copy + macro_nest + 1, input_line_pointer - 1, len);
735 copy[macro_nest + 1 + len] = '\0';
737 /* Install the line with the listing facility. */
738 listing_newline (copy);
742 listing_newline (NULL);
745 /* C is the 1st significant character.
746 Input_line_pointer points after that character. */
747 if (is_name_beginner (c))
749 /* Want user-defined label or pseudo/opcode. */
750 HANDLE_CONDITIONAL_ASSEMBLY ();
752 s = --input_line_pointer;
753 c = get_symbol_end (); /* name's delimiter. */
755 /* C is character after symbol.
756 That character's place in the input line is now '\0'.
757 S points to the beginning of the symbol.
758 [In case of pseudo-op, s->'.'.]
759 Input_line_pointer->'\0' where c was. */
760 if (TC_START_LABEL (c, input_line_pointer))
764 char *rest = input_line_pointer + 1;
766 /* In MRI mode, \tsym: set 0 is permitted. */
770 if (*rest == ' ' || *rest == '\t')
773 if ((strncasecmp (rest, "EQU", 3) == 0
774 || strncasecmp (rest, "SET", 3) == 0)
775 && (rest[3] == ' ' || rest[3] == '\t'))
777 input_line_pointer = rest + 3;
783 line_label = colon (s); /* User-defined label. */
784 /* Put ':' back for error messages' sake. */
785 *input_line_pointer++ = ':';
786 #ifdef tc_check_label
787 tc_check_label (line_label);
789 /* Input_line_pointer->after ':'. */
792 else if (input_line_pointer[1] == '='
794 || ((c == ' ' || c == '\t')
795 && input_line_pointer[2] == '=')))
798 demand_empty_rest_of_line ();
801 || ((c == ' ' || c == '\t')
802 && input_line_pointer[1] == '='))
803 #ifdef TC_EQUAL_IN_INSN
804 && !TC_EQUAL_IN_INSN (c, s)
809 demand_empty_rest_of_line ();
813 /* Expect pseudo-op or machine instruction. */
816 #ifndef TC_CASE_SENSITIVE
820 strncpy (original_case_string, s2, sizeof (original_case_string));
821 original_case_string[sizeof (original_case_string) - 1] = 0;
830 if (NO_PSEUDO_DOT || flag_m68k_mri)
832 /* The MRI assembler uses pseudo-ops without
834 pop = (pseudo_typeS *) hash_find (po_hash, s);
835 if (pop != NULL && pop->poc_handler == NULL)
840 || (!flag_m68k_mri && *s == '.'))
844 WARNING: c has next char, which may be end-of-line.
845 We lookup the pseudo-op table with s+1 because we
846 already know that the pseudo-op begins with a '.'. */
849 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
850 if (pop && !pop->poc_handler)
853 /* In MRI mode, we may need to insert an
854 automatic alignment directive. What a hack
856 if (mri_pending_align
858 || !((pop->poc_handler == cons
859 && pop->poc_val == 1)
860 || (pop->poc_handler == s_space
861 && pop->poc_val == 1)
862 #ifdef tc_conditional_pseudoop
863 || tc_conditional_pseudoop (pop)
865 || pop->poc_handler == s_if
866 || pop->poc_handler == s_ifdef
867 || pop->poc_handler == s_ifc
868 || pop->poc_handler == s_ifeqs
869 || pop->poc_handler == s_else
870 || pop->poc_handler == s_endif
871 || pop->poc_handler == s_globl
872 || pop->poc_handler == s_ignore)))
874 do_align (1, (char *) NULL, 0, 0);
875 mri_pending_align = 0;
877 if (line_label != NULL)
879 symbol_set_frag (line_label, frag_now);
880 S_SET_VALUE (line_label, frag_now_fix ());
884 /* Print the error msg now, while we still can. */
887 char *end = input_line_pointer;
889 *input_line_pointer = c;
891 c = *--input_line_pointer;
892 *input_line_pointer = '\0';
893 if (! macro_defined || ! try_macro (c, s))
896 as_bad (_("unknown pseudo-op: `%s'"), s);
897 *input_line_pointer++ = c;
902 /* Put it back for error messages etc. */
903 *input_line_pointer = c;
904 /* The following skip of whitespace is compulsory.
905 A well shaped space is sometimes all that separates
906 keyword from operands. */
907 if (c == ' ' || c == '\t')
908 input_line_pointer++;
910 /* Input_line is restored.
911 Input_line_pointer->1st non-blank char
912 after pseudo-operation. */
913 (*pop->poc_handler) (pop->poc_val);
915 /* If that was .end, just get out now. */
916 if (pop->poc_handler == s_end)
921 /* WARNING: c has char, which may be end-of-line. */
922 /* Also: input_line_pointer->`\0` where c was. */
923 *input_line_pointer = c;
924 input_line_pointer = _find_end_of_line (input_line_pointer, flag_m68k_mri, 1);
925 c = *input_line_pointer;
926 *input_line_pointer = '\0';
928 generate_lineno_debug ();
930 if (macro_defined && try_macro (c, s))
933 if (mri_pending_align)
935 do_align (1, (char *) NULL, 0, 0);
936 mri_pending_align = 0;
937 if (line_label != NULL)
939 symbol_set_frag (line_label, frag_now);
940 S_SET_VALUE (line_label, frag_now_fix ());
944 md_assemble (s); /* Assemble 1 instruction. */
946 *input_line_pointer++ = c;
948 /* We resume loop AFTER the end-of-line from
955 /* Empty statement? */
956 if (is_end_of_line[(unsigned char) c])
959 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) && ISDIGIT (c))
961 /* local label ("4:") */
962 char *backup = input_line_pointer;
964 HANDLE_CONDITIONAL_ASSEMBLY ();
968 /* Read the whole number. */
969 while (ISDIGIT (*input_line_pointer))
971 temp = (temp * 10) + *input_line_pointer - '0';
972 ++input_line_pointer;
975 if (LOCAL_LABELS_DOLLAR
976 && *input_line_pointer == '$'
977 && *(input_line_pointer + 1) == ':')
979 input_line_pointer += 2;
981 if (dollar_label_defined (temp))
983 as_fatal (_("label \"%d$\" redefined"), temp);
986 define_dollar_label (temp);
987 colon (dollar_label_name (temp, 0));
992 && *input_line_pointer++ == ':')
994 fb_label_instance_inc (temp);
995 colon (fb_label_name (temp, 0));
999 input_line_pointer = backup;
1000 } /* local label ("4:") */
1002 if (c && strchr (line_comment_chars, c))
1003 { /* Its a comment. Better say APP or NO_APP. */
1008 unsigned int new_length;
1011 bump_line_counters ();
1012 s = input_line_pointer;
1013 if (strncmp (s, "APP\n", 4))
1014 continue; /* We ignore it */
1018 ends = strstr (s, "#NO_APP\n");
1022 unsigned int tmp_len;
1025 /* The end of the #APP wasn't in this buffer. We
1026 keep reading in buffers until we find the #NO_APP
1027 that goes with this #APP There is one. The specs
1029 tmp_len = buffer_limit - s;
1030 tmp_buf = xmalloc (tmp_len + 1);
1031 memcpy (tmp_buf, s, tmp_len);
1034 new_tmp = input_scrub_next_buffer (&buffer);
1038 buffer_limit = new_tmp;
1039 input_line_pointer = buffer;
1040 ends = strstr (buffer, "#NO_APP\n");
1042 num = ends - buffer;
1044 num = buffer_limit - buffer;
1046 tmp_buf = xrealloc (tmp_buf, tmp_len + num);
1047 memcpy (tmp_buf + tmp_len, buffer, num);
1052 input_line_pointer = ends ? ends + 8 : NULL;
1060 input_line_pointer = ends + 8;
1064 scrub_string_end = ends;
1066 new_length = ends - s;
1067 new_buf = (char *) xmalloc (new_length);
1074 space = (new_buf + new_length) - new_tmp;
1075 size = do_scrub_chars (scrub_from_string, new_tmp, space);
1083 new_buf = xrealloc (new_buf, new_length + 100);
1084 new_tmp = new_buf + new_length;
1091 /* We've "scrubbed" input to the preferred format. In the
1092 process we may have consumed the whole of the remaining
1093 file (and included files). We handle this formatted
1094 input similar to that of macro expansion, letting
1095 actual macro expansion (possibly nested) and other
1096 input expansion work. Beware that in messages, line
1097 numbers and possibly file names will be incorrect. */
1098 sb_add_string (&sbuf, new_buf);
1099 input_scrub_include_sb (&sbuf, input_line_pointer, 0);
1101 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1106 HANDLE_CONDITIONAL_ASSEMBLY ();
1108 #ifdef tc_unrecognized_line
1109 if (tc_unrecognized_line (c))
1112 input_line_pointer--;
1113 /* Report unknown char as ignored. */
1114 demand_empty_rest_of_line ();
1117 #ifdef md_after_pass_hook
1118 md_after_pass_hook ();
1127 /* Close the input file. */
1128 input_scrub_close ();
1129 #ifdef WARN_COMMENTS
1131 if (warn_comment && found_comment)
1132 as_warn_where (found_comment_file, found_comment,
1133 "first comment found here");
1138 /* Convert O_constant expression EXP into the equivalent O_big representation.
1139 Take the sign of the number from X_unsigned rather than X_add_number. */
1142 convert_to_bignum (expressionS *exp)
1147 value = exp->X_add_number;
1148 for (i = 0; i < sizeof (exp->X_add_number) / CHARS_PER_LITTLENUM; i++)
1150 generic_bignum[i] = value & LITTLENUM_MASK;
1151 value >>= LITTLENUM_NUMBER_OF_BITS;
1153 /* Add a sequence of sign bits if the top bit of X_add_number is not
1154 the sign of the original value. */
1155 if ((exp->X_add_number < 0) != !exp->X_unsigned)
1156 generic_bignum[i++] = exp->X_unsigned ? 0 : LITTLENUM_MASK;
1158 exp->X_add_number = i;
1161 /* For most MRI pseudo-ops, the line actually ends at the first
1162 nonquoted space. This function looks for that point, stuffs a null
1163 in, and sets *STOPCP to the character that used to be there, and
1164 returns the location.
1166 Until I hear otherwise, I am going to assume that this is only true
1167 for the m68k MRI assembler. */
1170 mri_comment_field (char *stopcp)
1176 know (flag_m68k_mri);
1178 for (s = input_line_pointer;
1179 ((!is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
1187 for (s = input_line_pointer;
1188 !is_end_of_line[(unsigned char) *s];
1198 /* Skip to the end of an MRI comment field. */
1201 mri_comment_end (char *stop, int stopc)
1205 input_line_pointer = stop;
1207 while (!is_end_of_line[(unsigned char) *input_line_pointer])
1208 ++input_line_pointer;
1212 s_abort (int ignore ATTRIBUTE_UNUSED)
1214 as_fatal (_(".abort detected. Abandoning ship."));
1217 /* Guts of .align directive. N is the power of two to which to align.
1218 FILL may be NULL, or it may point to the bytes of the fill pattern.
1219 LEN is the length of whatever FILL points to, if anything. MAX is
1220 the maximum number of characters to skip when doing the alignment,
1221 or 0 if there is no maximum. */
1224 do_align (int n, char *fill, int len, int max)
1226 if (now_seg == absolute_section)
1230 if (*fill++ != '\0')
1232 as_warn (_("ignoring fill value in absolute section"));
1239 #ifdef md_flush_pending_output
1240 md_flush_pending_output ();
1243 md_do_align (n, fill, len, max, just_record_alignment);
1246 /* Only make a frag if we HAVE to... */
1247 if (n != 0 && !need_pass_2)
1251 if (subseg_text_p (now_seg))
1252 frag_align_code (n, max);
1254 frag_align (n, 0, max);
1257 frag_align (n, *fill, max);
1259 frag_align_pattern (n, fill, len, max);
1263 just_record_alignment: ATTRIBUTE_UNUSED_LABEL
1266 record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
1269 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1270 (in bytes). A negative ARG is the negative of the length of the
1271 fill pattern. BYTES_P is non-zero if the alignment value should be
1272 interpreted as the byte boundary, rather than the power of 2. */
1274 #define ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1277 s_align (int arg, int bytes_p)
1279 unsigned int align_limit = ALIGN_LIMIT;
1288 stop = mri_comment_field (&stopc);
1290 if (is_end_of_line[(unsigned char) *input_line_pointer])
1295 align = arg; /* Default value from pseudo-op table. */
1299 align = get_absolute_expression ();
1305 /* Convert to a power of 2. */
1310 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1313 as_bad (_("alignment not a power of 2"));
1319 if (align > align_limit)
1321 align = align_limit;
1322 as_warn (_("alignment too large: %u assumed"), align);
1325 if (*input_line_pointer != ',')
1332 ++input_line_pointer;
1333 if (*input_line_pointer == ',')
1337 fill = get_absolute_expression ();
1342 if (*input_line_pointer != ',')
1346 ++input_line_pointer;
1347 max = get_absolute_expression ();
1354 as_warn (_("expected fill pattern missing"));
1355 do_align (align, (char *) NULL, 0, max);
1370 do_align (align, &fill_char, fill_len, max);
1376 if ((size_t) fill_len > sizeof ab)
1378 md_number_to_chars (ab, fill, fill_len);
1379 do_align (align, ab, fill_len, max);
1383 demand_empty_rest_of_line ();
1386 mri_comment_end (stop, stopc);
1389 /* Handle the .align pseudo-op on machines where ".align 4" means
1390 align to a 4 byte boundary. */
1393 s_align_bytes (int arg)
1398 /* Handle the .align pseudo-op on machines where ".align 4" means align
1399 to a 2**4 boundary. */
1402 s_align_ptwo (int arg)
1407 /* Switch in and out of alternate macro mode. */
1412 demand_empty_rest_of_line ();
1413 macro_set_alternate (on);
1417 s_comm_internal (int param,
1418 symbolS *(*comm_parse_extra) (int, symbolS *, addressT))
1424 symbolS *symbolP = NULL;
1430 stop = mri_comment_field (&stopc);
1432 name = input_line_pointer;
1433 c = get_symbol_end ();
1434 /* Just after name is now '\0'. */
1435 p = input_line_pointer;
1440 as_bad (_("expected symbol name"));
1441 ignore_rest_of_line ();
1447 /* Accept an optional comma after the name. The comma used to be
1448 required, but Irix 5 cc does not generate it for .lcomm. */
1449 if (*input_line_pointer == ',')
1450 input_line_pointer++;
1452 temp = get_absolute_expr (&exp);
1454 size &= ((offsetT) 2 << (stdoutput->arch_info->bits_per_address - 1)) - 1;
1455 if (exp.X_op == O_absent)
1457 as_bad (_("missing size expression"));
1458 ignore_rest_of_line ();
1461 else if (temp != size || !exp.X_unsigned)
1463 as_warn (_("size (%ld) out of range, ignored"), (long) temp);
1464 ignore_rest_of_line ();
1469 symbolP = symbol_find_or_make (name);
1470 if (S_IS_DEFINED (symbolP) && !S_IS_COMMON (symbolP))
1473 as_bad (_("symbol `%s' is already defined"), name);
1475 ignore_rest_of_line ();
1479 size = S_GET_VALUE (symbolP);
1482 else if (size != temp)
1483 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1484 name, (long) size, (long) temp);
1487 if (comm_parse_extra != NULL)
1488 symbolP = (*comm_parse_extra) (param, symbolP, size);
1491 S_SET_VALUE (symbolP, (valueT) size);
1492 S_SET_EXTERNAL (symbolP);
1493 S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
1496 extern int flag_one;
1497 if (size == 0 || !flag_one)
1498 S_GET_OTHER (symbolP) = const_flag;
1503 demand_empty_rest_of_line ();
1506 mri_comment_end (stop, stopc);
1513 s_comm_internal (ignore, NULL);
1516 /* The MRI COMMON pseudo-op. We handle this by creating a common
1517 symbol with the appropriate name. We make s_space do the right
1518 thing by increasing the size. */
1521 s_mri_common (int small ATTRIBUTE_UNUSED)
1537 stop = mri_comment_field (&stopc);
1541 name = input_line_pointer;
1542 if (!ISDIGIT (*name))
1543 c = get_symbol_end ();
1548 ++input_line_pointer;
1550 while (ISDIGIT (*input_line_pointer));
1552 c = *input_line_pointer;
1553 *input_line_pointer = '\0';
1555 if (line_label != NULL)
1557 alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
1558 + (input_line_pointer - name)
1560 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1565 sym = symbol_find_or_make (name);
1566 *input_line_pointer = c;
1570 if (*input_line_pointer != ',')
1574 ++input_line_pointer;
1575 align = get_absolute_expression ();
1578 if (S_IS_DEFINED (sym) && !S_IS_COMMON (sym))
1580 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym));
1581 ignore_rest_of_line ();
1582 mri_comment_end (stop, stopc);
1586 S_SET_EXTERNAL (sym);
1587 S_SET_SEGMENT (sym, bfd_com_section_ptr);
1588 mri_common_symbol = sym;
1592 S_SET_ALIGN (sym, align);
1595 if (line_label != NULL)
1598 exp.X_op = O_symbol;
1599 exp.X_add_symbol = sym;
1600 exp.X_add_number = 0;
1601 symbol_set_value_expression (line_label, &exp);
1602 symbol_set_frag (line_label, &zero_address_frag);
1603 S_SET_SEGMENT (line_label, expr_section);
1606 /* FIXME: We just ignore the small argument, which distinguishes
1607 COMMON and COMMON.S. I don't know what we can do about it. */
1609 /* Ignore the type and hptype. */
1610 if (*input_line_pointer == ',')
1611 input_line_pointer += 2;
1612 if (*input_line_pointer == ',')
1613 input_line_pointer += 2;
1615 demand_empty_rest_of_line ();
1617 mri_comment_end (stop, stopc);
1621 s_data (int ignore ATTRIBUTE_UNUSED)
1626 temp = get_absolute_expression ();
1627 if (flag_readonly_data_in_text)
1629 section = text_section;
1633 section = data_section;
1635 subseg_set (section, (subsegT) temp);
1640 demand_empty_rest_of_line ();
1643 /* Handle the .appfile pseudo-op. This is automatically generated by
1644 do_scrub_chars when a preprocessor # line comment is seen with a
1645 file name. This default definition may be overridden by the object
1646 or CPU specific pseudo-ops. This function is also the default
1647 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1651 s_app_file_string (char *file, int appfile ATTRIBUTE_UNUSED)
1655 listing_source_file (file);
1657 register_dependency (file);
1659 obj_app_file (file, appfile);
1664 s_app_file (int appfile)
1669 /* Some assemblers tolerate immediately following '"'. */
1670 if ((s = demand_copy_string (&length)) != 0)
1672 /* If this is a fake .appfile, a fake newline was inserted into
1673 the buffer. Passing -2 to new_logical_line tells it to
1676 = (!new_logical_line (s, appfile ? -2 : -1) && appfile);
1678 /* In MRI mode, the preprocessor may have inserted an extraneous
1681 && *input_line_pointer == '\''
1682 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1683 ++input_line_pointer;
1685 demand_empty_rest_of_line ();
1687 s_app_file_string (s, appfile);
1691 /* Handle the .appline pseudo-op. This is automatically generated by
1692 do_scrub_chars when a preprocessor # line comment is seen. This
1693 default definition may be overridden by the object or CPU specific
1697 s_app_line (int ignore ATTRIBUTE_UNUSED)
1701 /* The given number is that of the next line. */
1702 l = get_absolute_expression () - 1;
1705 /* Some of the back ends can't deal with non-positive line numbers.
1706 Besides, it's silly. GCC however will generate a line number of
1707 zero when it is pre-processing builtins for assembler-with-cpp files:
1711 We do not want to barf on this, especially since such files are used
1712 in the GCC and GDB testsuites. So we check for negative line numbers
1713 rather than non-positive line numbers. */
1714 as_warn (_("line numbers must be positive; line number %d rejected"),
1718 new_logical_line ((char *) NULL, l);
1721 listing_source_line (l);
1724 demand_empty_rest_of_line ();
1727 /* Handle the .end pseudo-op. Actually, the real work is done in
1728 read_a_source_file. */
1731 s_end (int ignore ATTRIBUTE_UNUSED)
1735 /* The MRI assembler permits the start symbol to follow .end,
1736 but we don't support that. */
1738 if (!is_end_of_line[(unsigned char) *input_line_pointer]
1739 && *input_line_pointer != '*'
1740 && *input_line_pointer != '!')
1741 as_warn (_("start address not supported"));
1745 /* Handle the .err pseudo-op. */
1748 s_err (int ignore ATTRIBUTE_UNUSED)
1750 as_bad (_(".err encountered"));
1751 demand_empty_rest_of_line ();
1754 /* Handle the .error and .warning pseudo-ops. */
1760 /* The purpose for the conditional assignment is not to
1761 internationalize the directive itself, but that we need a
1762 self-contained message, one that can be passed like the
1763 demand_copy_C_string return value, and with no assumption on the
1764 location of the name of the directive within the message. */
1766 = (err ? _(".error directive invoked in source file")
1767 : _(".warning directive invoked in source file"));
1769 if (!is_it_end_of_statement ())
1771 if (*input_line_pointer != '\"')
1773 as_bad (_("%s argument must be a string"),
1774 err ? ".error" : ".warning");
1775 ignore_rest_of_line ();
1779 msg = demand_copy_C_string (&len);
1787 as_warn ("%s", msg);
1788 demand_empty_rest_of_line ();
1791 /* Handle the MRI fail pseudo-op. */
1794 s_fail (int ignore ATTRIBUTE_UNUSED)
1801 stop = mri_comment_field (&stopc);
1803 temp = get_absolute_expression ();
1805 as_warn (_(".fail %ld encountered"), (long) temp);
1807 as_bad (_(".fail %ld encountered"), (long) temp);
1809 demand_empty_rest_of_line ();
1812 mri_comment_end (stop, stopc);
1816 s_fill (int ignore ATTRIBUTE_UNUSED)
1818 expressionS rep_exp;
1820 register long fill = 0;
1823 #ifdef md_flush_pending_output
1824 md_flush_pending_output ();
1827 get_known_segmented_expression (&rep_exp);
1828 if (*input_line_pointer == ',')
1830 input_line_pointer++;
1831 size = get_absolute_expression ();
1832 if (*input_line_pointer == ',')
1834 input_line_pointer++;
1835 fill = get_absolute_expression ();
1839 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1840 #define BSD_FILL_SIZE_CROCK_8 (8)
1841 if (size > BSD_FILL_SIZE_CROCK_8)
1843 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8);
1844 size = BSD_FILL_SIZE_CROCK_8;
1848 as_warn (_("size negative; .fill ignored"));
1851 else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
1853 if (rep_exp.X_add_number < 0)
1854 as_warn (_("repeat < 0; .fill ignored"));
1858 if (size && !need_pass_2)
1860 if (rep_exp.X_op == O_constant)
1862 p = frag_var (rs_fill, (int) size, (int) size,
1863 (relax_substateT) 0, (symbolS *) 0,
1864 (offsetT) rep_exp.X_add_number,
1869 /* We don't have a constant repeat count, so we can't use
1870 rs_fill. We can get the same results out of rs_space,
1871 but its argument is in bytes, so we must multiply the
1872 repeat count by size. */
1875 rep_sym = make_expr_symbol (&rep_exp);
1878 expressionS size_exp;
1879 size_exp.X_op = O_constant;
1880 size_exp.X_add_number = size;
1882 rep_exp.X_op = O_multiply;
1883 rep_exp.X_add_symbol = rep_sym;
1884 rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
1885 rep_exp.X_add_number = 0;
1886 rep_sym = make_expr_symbol (&rep_exp);
1889 p = frag_var (rs_space, (int) size, (int) size,
1890 (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
1893 memset (p, 0, (unsigned int) size);
1895 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1896 flavoured AS. The following bizarre behaviour is to be
1897 compatible with above. I guess they tried to take up to 8
1898 bytes from a 4-byte expression and they forgot to sign
1900 #define BSD_FILL_SIZE_CROCK_4 (4)
1901 md_number_to_chars (p, (valueT) fill,
1902 (size > BSD_FILL_SIZE_CROCK_4
1903 ? BSD_FILL_SIZE_CROCK_4
1905 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1906 but emits no error message because it seems a legal thing to do.
1907 It is a degenerate case of .fill but could be emitted by a
1910 demand_empty_rest_of_line ();
1914 s_globl (int ignore ATTRIBUTE_UNUSED)
1923 stop = mri_comment_field (&stopc);
1927 name = input_line_pointer;
1928 c = get_symbol_end ();
1929 symbolP = symbol_find_or_make (name);
1930 S_SET_EXTERNAL (symbolP);
1932 *input_line_pointer = c;
1934 c = *input_line_pointer;
1937 input_line_pointer++;
1939 if (is_end_of_line[(unsigned char) *input_line_pointer])
1945 demand_empty_rest_of_line ();
1948 mri_comment_end (stop, stopc);
1951 /* Handle the MRI IRP and IRPC pseudo-ops. */
1962 as_where (&file, &line);
1965 eol = find_end_of_line (input_line_pointer, 0);
1966 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
1967 input_line_pointer = eol;
1971 err = expand_irp (irpc, 0, &s, &out, get_line_sb);
1973 as_bad_where (file, line, "%s", err);
1977 input_scrub_include_sb (&out, input_line_pointer, 1);
1979 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1982 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
1983 the section to only be linked once. However, this is not supported
1984 by most object file formats. This takes an optional argument,
1985 which is what to do about duplicates. */
1988 s_linkonce (int ignore ATTRIBUTE_UNUSED)
1990 enum linkonce_type type;
1994 type = LINKONCE_DISCARD;
1996 if (!is_end_of_line[(unsigned char) *input_line_pointer])
2001 s = input_line_pointer;
2002 c = get_symbol_end ();
2003 if (strcasecmp (s, "discard") == 0)
2004 type = LINKONCE_DISCARD;
2005 else if (strcasecmp (s, "one_only") == 0)
2006 type = LINKONCE_ONE_ONLY;
2007 else if (strcasecmp (s, "same_size") == 0)
2008 type = LINKONCE_SAME_SIZE;
2009 else if (strcasecmp (s, "same_contents") == 0)
2010 type = LINKONCE_SAME_CONTENTS;
2012 as_warn (_("unrecognized .linkonce type `%s'"), s);
2014 *input_line_pointer = c;
2017 #ifdef obj_handle_link_once
2018 obj_handle_link_once (type);
2019 #else /* ! defined (obj_handle_link_once) */
2023 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
2024 as_warn (_(".linkonce is not supported for this object file format"));
2026 flags = bfd_get_section_flags (stdoutput, now_seg);
2027 flags |= SEC_LINK_ONCE;
2032 case LINKONCE_DISCARD:
2033 flags |= SEC_LINK_DUPLICATES_DISCARD;
2035 case LINKONCE_ONE_ONLY:
2036 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
2038 case LINKONCE_SAME_SIZE:
2039 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
2041 case LINKONCE_SAME_CONTENTS:
2042 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
2045 if (!bfd_set_section_flags (stdoutput, now_seg, flags))
2046 as_bad (_("bfd_set_section_flags: %s"),
2047 bfd_errmsg (bfd_get_error ()));
2049 #endif /* ! defined (obj_handle_link_once) */
2051 demand_empty_rest_of_line ();
2055 bss_alloc (symbolS *symbolP, addressT size, int align)
2058 segT current_seg = now_seg;
2059 subsegT current_subseg = now_subseg;
2060 segT bss_seg = bss_section;
2062 #if defined (TC_MIPS) || defined (TC_ALPHA)
2063 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
2064 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
2066 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2067 if (size <= bfd_get_gp_size (stdoutput))
2069 bss_seg = subseg_new (".sbss", 1);
2070 seg_info (bss_seg)->bss = 1;
2071 if (!bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
2072 as_warn (_("error setting flags for \".sbss\": %s"),
2073 bfd_errmsg (bfd_get_error ()));
2077 subseg_set (bss_seg, 1);
2081 record_alignment (bss_seg, align);
2082 frag_align (align, 0, 0);
2085 /* Detach from old frag. */
2086 if (S_GET_SEGMENT (symbolP) == bss_seg)
2087 symbol_get_frag (symbolP)->fr_symbol = NULL;
2089 symbol_set_frag (symbolP, frag_now);
2090 pfrag = frag_var (rs_org, 1, 1, 0, symbolP, size, NULL);
2094 S_SET_SIZE (symbolP, size);
2096 S_SET_SEGMENT (symbolP, bss_seg);
2099 /* The symbol may already have been created with a preceding
2100 ".globl" directive -- be careful not to step on storage class
2101 in that case. Otherwise, set it to static. */
2102 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
2103 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2104 #endif /* OBJ_COFF */
2106 subseg_set (current_seg, current_subseg);
2110 parse_align (int align_bytes)
2116 if (*input_line_pointer != ',')
2119 as_bad (_("expected alignment after size"));
2120 ignore_rest_of_line ();
2124 input_line_pointer++;
2127 align = get_absolute_expr (&exp);
2128 if (exp.X_op == O_absent)
2131 if (!exp.X_unsigned)
2133 as_warn (_("alignment negative; 0 assumed"));
2137 if (align_bytes && align != 0)
2139 /* convert to a power of 2 alignment */
2140 unsigned int alignp2 = 0;
2141 while ((align & 1) == 0)
2142 align >>= 1, ++alignp2;
2145 as_bad (_("alignment not a power of 2"));
2146 ignore_rest_of_line ();
2154 /* Called from s_comm_internal after symbol name and size have been
2155 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2156 1 if this was a ".bss" directive which has a 3rd argument
2157 (alignment as a power of 2), or 2 if this was a ".bss" directive
2158 with alignment in bytes. */
2161 s_lcomm_internal (int needs_align, symbolS *symbolP, addressT size)
2167 align = parse_align (needs_align - 1);
2168 if (align == (addressT) -1)
2172 /* Assume some objects may require alignment on some systems. */
2173 TC_IMPLICIT_LCOMM_ALIGNMENT (size, align);
2175 bss_alloc (symbolP, size, align);
2180 s_lcomm (int needs_align)
2182 s_comm_internal (needs_align, s_lcomm_internal);
2186 s_lcomm_bytes (int needs_align)
2188 s_comm_internal (needs_align * 2, s_lcomm_internal);
2192 s_lsym (int ignore ATTRIBUTE_UNUSED)
2194 register char *name;
2198 register symbolS *symbolP;
2200 /* We permit ANY defined expression: BSD4.2 demands constants. */
2201 name = input_line_pointer;
2202 c = get_symbol_end ();
2203 p = input_line_pointer;
2208 as_bad (_("expected symbol name"));
2209 ignore_rest_of_line ();
2215 if (*input_line_pointer != ',')
2218 as_bad (_("expected comma after \"%s\""), name);
2220 ignore_rest_of_line ();
2224 input_line_pointer++;
2225 expression_and_evaluate (&exp);
2227 if (exp.X_op != O_constant
2228 && exp.X_op != O_register)
2230 as_bad (_("bad expression"));
2231 ignore_rest_of_line ();
2236 symbolP = symbol_find_or_make (name);
2238 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
2239 symbolP->sy_desc == 0) out of this test because coff doesn't have
2240 those fields, and I can't see when they'd ever be tripped. I
2241 don't think I understand why they were here so I may have
2242 introduced a bug. As recently as 1.37 didn't have this test
2243 anyway. xoxorich. */
2245 if (S_GET_SEGMENT (symbolP) == undefined_section
2246 && S_GET_VALUE (symbolP) == 0)
2248 /* The name might be an undefined .global symbol; be sure to
2249 keep the "external" bit. */
2250 S_SET_SEGMENT (symbolP,
2251 (exp.X_op == O_constant
2254 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2258 as_bad (_("symbol `%s' is already defined"), name);
2262 demand_empty_rest_of_line ();
2265 /* Read a line into an sb. Returns the character that ended the line
2266 or zero if there are no more lines. */
2269 get_line_sb (sb *line)
2273 if (input_line_pointer[-1] == '\n')
2274 bump_line_counters ();
2276 if (input_line_pointer >= buffer_limit)
2278 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2279 if (buffer_limit == 0)
2283 eol = find_end_of_line (input_line_pointer, flag_m68k_mri);
2284 sb_add_buffer (line, input_line_pointer, eol - input_line_pointer);
2285 input_line_pointer = eol;
2287 /* Don't skip multiple end-of-line characters, because that breaks support
2288 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2289 characters but isn't. Instead just skip one end of line character and
2290 return the character skipped so that the caller can re-insert it if
2292 return *input_line_pointer++;
2295 /* Define a macro. This is an interface to macro.c. */
2298 s_macro (int ignore ATTRIBUTE_UNUSED)
2306 as_where (&file, &line);
2309 eol = find_end_of_line (input_line_pointer, 0);
2310 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2311 input_line_pointer = eol;
2313 if (line_label != NULL)
2318 sb_add_string (&label, S_GET_NAME (line_label));
2319 err = define_macro (0, &s, &label, get_line_sb, file, line, &name);
2323 err = define_macro (0, &s, NULL, get_line_sb, file, line, &name);
2325 as_bad_where (file, line, err, name);
2328 if (line_label != NULL)
2330 S_SET_SEGMENT (line_label, absolute_section);
2331 S_SET_VALUE (line_label, 0);
2332 symbol_set_frag (line_label, &zero_address_frag);
2335 if (((NO_PSEUDO_DOT || flag_m68k_mri)
2336 && hash_find (po_hash, name) != NULL)
2339 && hash_find (po_hash, name + 1) != NULL))
2340 as_warn_where (file,
2342 _("attempt to redefine pseudo-op `%s' ignored"),
2349 /* Handle the .mexit pseudo-op, which immediately exits a macro
2353 s_mexit (int ignore ATTRIBUTE_UNUSED)
2355 cond_exit_macro (macro_nest);
2356 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2359 /* Switch in and out of MRI mode. */
2362 s_mri (int ignore ATTRIBUTE_UNUSED)
2366 on = get_absolute_expression ();
2367 old_flag = flag_mri;
2385 /* Operator precedence changes in m68k MRI mode, so we need to
2386 update the operator rankings. */
2387 expr_set_precedence ();
2389 #ifdef MRI_MODE_CHANGE
2391 MRI_MODE_CHANGE (on);
2394 demand_empty_rest_of_line ();
2397 /* Handle changing the location counter. */
2400 do_org (segT segment, expressionS *exp, int fill)
2402 if (segment != now_seg && segment != absolute_section)
2403 as_bad (_("invalid segment \"%s\""), segment_name (segment));
2405 if (now_seg == absolute_section)
2408 as_warn (_("ignoring fill value in absolute section"));
2409 if (exp->X_op != O_constant)
2411 as_bad (_("only constant offsets supported in absolute section"));
2412 exp->X_add_number = 0;
2414 abs_section_offset = exp->X_add_number;
2419 symbolS *sym = exp->X_add_symbol;
2420 offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
2422 if (exp->X_op != O_constant && exp->X_op != O_symbol)
2424 /* Handle complex expressions. */
2425 sym = make_expr_symbol (exp);
2429 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
2435 s_org (int ignore ATTRIBUTE_UNUSED)
2437 register segT segment;
2439 register long temp_fill;
2441 #ifdef md_flush_pending_output
2442 md_flush_pending_output ();
2445 /* The m68k MRI assembler has a different meaning for .org. It
2446 means to create an absolute section at a given address. We can't
2447 support that--use a linker script instead. */
2450 as_bad (_("MRI style ORG pseudo-op not supported"));
2451 ignore_rest_of_line ();
2455 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2456 thing as a sub-segment-relative origin. Any absolute origin is
2457 given a warning, then assumed to be segment-relative. Any
2458 segmented origin expression ("foo+42") had better be in the right
2459 segment or the .org is ignored.
2461 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2462 we never know sub-segment sizes when we are reading code. BSD
2463 will crash trying to emit negative numbers of filler bytes in
2464 certain .orgs. We don't crash, but see as-write for that code.
2466 Don't make frag if need_pass_2==1. */
2467 segment = get_known_segmented_expression (&exp);
2468 if (*input_line_pointer == ',')
2470 input_line_pointer++;
2471 temp_fill = get_absolute_expression ();
2477 do_org (segment, &exp, temp_fill);
2479 demand_empty_rest_of_line ();
2482 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2483 called by the obj-format routine which handles section changing
2484 when in MRI mode. It will create a new section, and return it. It
2485 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2486 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2489 s_mri_sect (char *type ATTRIBUTE_UNUSED)
2499 name = input_line_pointer;
2500 if (!ISDIGIT (*name))
2501 c = get_symbol_end ();
2506 ++input_line_pointer;
2508 while (ISDIGIT (*input_line_pointer));
2510 c = *input_line_pointer;
2511 *input_line_pointer = '\0';
2514 name = xstrdup (name);
2516 *input_line_pointer = c;
2518 seg = subseg_new (name, 0);
2520 if (*input_line_pointer == ',')
2524 ++input_line_pointer;
2525 align = get_absolute_expression ();
2526 record_alignment (seg, align);
2530 if (*input_line_pointer == ',')
2532 c = *++input_line_pointer;
2534 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2537 as_bad (_("unrecognized section type"));
2538 ++input_line_pointer;
2543 flags = SEC_NO_FLAGS;
2545 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2546 else if (*type == 'D' || *type == 'M')
2547 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2548 else if (*type == 'R')
2549 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2550 if (flags != SEC_NO_FLAGS)
2552 if (!bfd_set_section_flags (stdoutput, seg, flags))
2553 as_warn (_("error setting flags for \"%s\": %s"),
2554 bfd_section_name (stdoutput, seg),
2555 bfd_errmsg (bfd_get_error ()));
2560 /* Ignore the HP type. */
2561 if (*input_line_pointer == ',')
2562 input_line_pointer += 2;
2564 demand_empty_rest_of_line ();
2566 #else /* ! TC_M68K */
2575 name = input_line_pointer;
2576 c = get_symbol_end ();
2578 name = xstrdup (name);
2580 *input_line_pointer = c;
2582 seg = subseg_new (name, 0);
2584 if (*input_line_pointer != ',')
2590 ++input_line_pointer;
2592 sectype = input_line_pointer;
2593 c = get_symbol_end ();
2594 if (*sectype == '\0')
2596 else if (strcasecmp (sectype, "text") == 0)
2598 else if (strcasecmp (sectype, "data") == 0)
2600 else if (strcasecmp (sectype, "romdata") == 0)
2603 as_warn (_("unrecognized section type `%s'"), sectype);
2604 *input_line_pointer = c;
2607 if (*input_line_pointer == ',')
2611 ++input_line_pointer;
2613 seccmd = input_line_pointer;
2614 c = get_symbol_end ();
2615 if (strcasecmp (seccmd, "absolute") == 0)
2617 as_bad (_("absolute sections are not supported"));
2618 *input_line_pointer = c;
2619 ignore_rest_of_line ();
2622 else if (strcasecmp (seccmd, "align") == 0)
2626 *input_line_pointer = c;
2627 align = get_absolute_expression ();
2628 record_alignment (seg, align);
2632 as_warn (_("unrecognized section command `%s'"), seccmd);
2633 *input_line_pointer = c;
2637 demand_empty_rest_of_line ();
2639 #else /* ! TC_I960 */
2640 /* The MRI assembler seems to use different forms of .sect for
2641 different targets. */
2642 as_bad ("MRI mode not supported for this target");
2643 ignore_rest_of_line ();
2644 #endif /* ! TC_I960 */
2645 #endif /* ! TC_M68K */
2648 /* Handle the .print pseudo-op. */
2651 s_print (int ignore ATTRIBUTE_UNUSED)
2656 s = demand_copy_C_string (&len);
2659 demand_empty_rest_of_line ();
2662 /* Handle the .purgem pseudo-op. */
2665 s_purgem (int ignore ATTRIBUTE_UNUSED)
2667 if (is_it_end_of_statement ())
2669 demand_empty_rest_of_line ();
2679 name = input_line_pointer;
2680 c = get_symbol_end ();
2681 delete_macro (name);
2682 *input_line_pointer = c;
2685 while (*input_line_pointer++ == ',');
2687 --input_line_pointer;
2688 demand_empty_rest_of_line ();
2691 /* Handle the .endm/.endr pseudo-ops. */
2694 s_bad_end (int endr)
2696 as_warn (_(".end%c encountered without preceeding %s"),
2698 endr ? ".rept, .irp, or .irpc" : ".macro");
2699 demand_empty_rest_of_line ();
2702 /* Handle the .rept pseudo-op. */
2705 s_rept (int ignore ATTRIBUTE_UNUSED)
2709 count = get_absolute_expression ();
2711 do_repeat (count, "REPT", "ENDR");
2714 /* This function provides a generic repeat block implementation. It allows
2715 different directives to be used as the start/end keys. */
2718 do_repeat (int count, const char *start, const char *end)
2724 if (!buffer_and_nest (start, end, &one, get_line_sb))
2726 as_bad (_("%s without %s"), start, end);
2732 sb_add_sb (&many, &one);
2736 input_scrub_include_sb (&many, input_line_pointer, 1);
2738 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2741 /* Skip to end of current repeat loop; EXTRA indicates how many additional
2742 input buffers to skip. Assumes that conditionals preceding the loop end
2743 are properly nested.
2745 This function makes it easier to implement a premature "break" out of the
2746 loop. The EXTRA arg accounts for other buffers we might have inserted,
2747 such as line substitutions. */
2750 end_repeat (int extra)
2752 cond_exit_macro (macro_nest);
2753 while (extra-- >= 0)
2754 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2758 assign_symbol (char *name, int mode)
2762 if (name[0] == '.' && name[1] == '\0')
2764 /* Turn '. = mumble' into a .org mumble. */
2768 segment = get_known_segmented_expression (&exp);
2771 do_org (segment, &exp, 0);
2776 if ((symbolP = symbol_find (name)) == NULL
2777 && (symbolP = md_undefined_symbol (name)) == NULL)
2779 symbolP = symbol_find_or_make (name);
2781 /* When doing symbol listings, play games with dummy fragments living
2782 outside the normal fragment chain to record the file and line info
2784 if (listing & LISTING_SYMBOLS)
2786 extern struct list_info_struct *listing_tail;
2787 fragS *dummy_frag = (fragS *) xcalloc (1, sizeof (fragS));
2788 dummy_frag->line = listing_tail;
2789 dummy_frag->fr_symbol = symbolP;
2790 symbol_set_frag (symbolP, dummy_frag);
2794 /* "set" symbols are local unless otherwise specified. */
2795 SF_SET_LOCAL (symbolP);
2799 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
2801 /* Permit register names to be redefined. */
2802 if ((mode != 0 || !S_IS_VOLATILE (symbolP))
2803 && S_GET_SEGMENT (symbolP) != reg_section)
2805 as_bad (_("symbol `%s' is already defined"), name);
2806 symbolP = symbol_clone (symbolP, 0);
2808 /* If the symbol is volatile, copy the symbol and replace the
2809 original with the copy, so that previous uses of the symbol will
2810 retain the value of the symbol at the point of use. */
2811 else if (S_IS_VOLATILE (symbolP)
2812 /* This could be avoided when the symbol wasn't used so far, but
2813 the comment in struc-symbol.h says this flag isn't reliable. */
2814 && (1 || symbol_used_p (symbolP)))
2815 symbolP = symbol_clone (symbolP, 1);
2819 S_SET_VOLATILE (symbolP);
2821 S_SET_FORWARD_REF (symbolP);
2823 pseudo_set (symbolP);
2826 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
2827 then this is .equiv, and it is an error if the symbol is already
2828 defined. If EQUIV is -1, the symbol additionally is a forward
2838 /* Especial apologies for the random logic:
2839 this just grew, and could be parsed much more simply!
2841 name = input_line_pointer;
2842 delim = get_symbol_end ();
2843 end_name = input_line_pointer;
2846 if (name == end_name)
2848 as_bad (_("expected symbol name"));
2849 ignore_rest_of_line ();
2855 if (*input_line_pointer != ',')
2858 as_bad (_("expected comma after \"%s\""), name);
2860 ignore_rest_of_line ();
2864 input_line_pointer++;
2867 assign_symbol (name, equiv);
2870 demand_empty_rest_of_line ();
2883 #ifdef md_flush_pending_output
2884 md_flush_pending_output ();
2888 stop = mri_comment_field (&stopc);
2890 /* In m68k MRI mode, we need to align to a word boundary, unless
2892 if (flag_m68k_mri && mult > 1)
2894 if (now_seg == absolute_section)
2896 abs_section_offset += abs_section_offset & 1;
2897 if (line_label != NULL)
2898 S_SET_VALUE (line_label, abs_section_offset);
2900 else if (mri_common_symbol != NULL)
2904 val = S_GET_VALUE (mri_common_symbol);
2907 S_SET_VALUE (mri_common_symbol, val + 1);
2908 if (line_label != NULL)
2910 expressionS *symexp;
2912 symexp = symbol_get_value_expression (line_label);
2913 know (symexp->X_op == O_symbol);
2914 know (symexp->X_add_symbol == mri_common_symbol);
2915 symexp->X_add_number += 1;
2921 do_align (1, (char *) NULL, 0, 0);
2922 if (line_label != NULL)
2924 symbol_set_frag (line_label, frag_now);
2925 S_SET_VALUE (line_label, frag_now_fix ());
2935 if (*input_line_pointer == ',')
2937 ++input_line_pointer;
2942 val.X_op = O_constant;
2943 val.X_add_number = 0;
2946 if (val.X_op != O_constant
2947 || val.X_add_number < - 0x80
2948 || val.X_add_number > 0xff
2949 || (mult != 0 && mult != 1 && val.X_add_number != 0))
2951 resolve_expression (&exp);
2952 if (exp.X_op != O_constant)
2953 as_bad (_("unsupported variable size or fill value"));
2960 bytes = mult * exp.X_add_number;
2961 for (i = 0; i < exp.X_add_number; i++)
2962 emit_expr (&val, mult);
2967 if (now_seg == absolute_section || mri_common_symbol != NULL)
2968 resolve_expression (&exp);
2970 if (exp.X_op == O_constant)
2974 repeat = exp.X_add_number;
2981 as_warn (_(".space repeat count is zero, ignored"));
2982 else if (repeat < 0)
2983 as_warn (_(".space repeat count is negative, ignored"));
2987 /* If we are in the absolute section, just bump the offset. */
2988 if (now_seg == absolute_section)
2990 abs_section_offset += repeat;
2994 /* If we are secretly in an MRI common section, then
2995 creating space just increases the size of the common
2997 if (mri_common_symbol != NULL)
2999 S_SET_VALUE (mri_common_symbol,
3000 S_GET_VALUE (mri_common_symbol) + repeat);
3005 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
3006 (offsetT) repeat, (char *) 0);
3010 if (now_seg == absolute_section)
3012 as_bad (_("space allocation too complex in absolute section"));
3013 subseg_set (text_section, 0);
3016 if (mri_common_symbol != NULL)
3018 as_bad (_("space allocation too complex in common section"));
3019 mri_common_symbol = NULL;
3023 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
3024 make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
3028 *p = val.X_add_number;
3033 /* In MRI mode, after an odd number of bytes, we must align to an
3034 even word boundary, unless the next instruction is a dc.b, ds.b
3036 if (flag_mri && (bytes & 1) != 0)
3037 mri_pending_align = 1;
3039 demand_empty_rest_of_line ();
3042 mri_comment_end (stop, stopc);
3045 /* This is like s_space, but the value is a floating point number with
3046 the given precision. This is for the MRI dcb.s pseudo-op and
3050 s_float_space (int float_type)
3054 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3059 stop = mri_comment_field (&stopc);
3061 count = get_absolute_expression ();
3064 if (*input_line_pointer != ',')
3066 as_bad (_("missing value"));
3067 ignore_rest_of_line ();
3069 mri_comment_end (stop, stopc);
3073 ++input_line_pointer;
3077 /* Skip any 0{letter} that may be present. Don't even check if the
3078 * letter is legal. */
3079 if (input_line_pointer[0] == '0'
3080 && ISALPHA (input_line_pointer[1]))
3081 input_line_pointer += 2;
3083 /* Accept :xxxx, where the x's are hex digits, for a floating point
3084 with the exact digits specified. */
3085 if (input_line_pointer[0] == ':')
3087 flen = hex_float (float_type, temp);
3090 ignore_rest_of_line ();
3092 mri_comment_end (stop, stopc);
3100 err = md_atof (float_type, temp, &flen);
3101 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
3105 as_bad (_("bad floating literal: %s"), err);
3106 ignore_rest_of_line ();
3108 mri_comment_end (stop, stopc);
3113 while (--count >= 0)
3117 p = frag_more (flen);
3118 memcpy (p, temp, (unsigned int) flen);
3121 demand_empty_rest_of_line ();
3124 mri_comment_end (stop, stopc);
3127 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3130 s_struct (int ignore ATTRIBUTE_UNUSED)
3136 stop = mri_comment_field (&stopc);
3137 abs_section_offset = get_absolute_expression ();
3138 subseg_set (absolute_section, 0);
3139 demand_empty_rest_of_line ();
3141 mri_comment_end (stop, stopc);
3145 s_text (int ignore ATTRIBUTE_UNUSED)
3149 temp = get_absolute_expression ();
3150 subseg_set (text_section, (subsegT) temp);
3151 demand_empty_rest_of_line ();
3153 const_flag &= ~IN_DEFAULT_SECTION;
3157 /* .weakref x, y sets x as an alias to y that, as long as y is not
3158 referenced directly, will cause y to become a weak symbol. */
3160 s_weakref (int ignore ATTRIBUTE_UNUSED)
3169 name = input_line_pointer;
3170 delim = get_symbol_end ();
3171 end_name = input_line_pointer;
3173 if (name == end_name)
3175 as_bad (_("expected symbol name"));
3177 ignore_rest_of_line ();
3181 symbolP = symbol_find_or_make (name);
3183 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
3185 as_bad (_("symbol `%s' is already defined"), name);
3187 ignore_rest_of_line ();
3195 if (*input_line_pointer != ',')
3198 as_bad (_("expected comma after \"%s\""), name);
3200 ignore_rest_of_line ();
3204 input_line_pointer++;
3208 name = input_line_pointer;
3209 delim = get_symbol_end ();
3210 end_name = input_line_pointer;
3212 if (name == end_name)
3214 as_bad (_("expected symbol name"));
3215 ignore_rest_of_line ();
3219 if ((symbolP2 = symbol_find_noref (name, 1)) == NULL
3220 && (symbolP2 = md_undefined_symbol (name)) == NULL)
3222 symbolP2 = symbol_find_or_make (name);
3223 S_SET_WEAKREFD (symbolP2);
3227 symbolS *symp = symbolP2;
3229 while (S_IS_WEAKREFR (symp) && symp != symbolP)
3231 expressionS *expP = symbol_get_value_expression (symp);
3233 assert (expP->X_op == O_symbol
3234 && expP->X_add_number == 0);
3235 symp = expP->X_add_symbol;
3237 if (symp == symbolP)
3241 loop = concat (S_GET_NAME (symbolP),
3242 " => ", S_GET_NAME (symbolP2), NULL);
3245 while (symp != symbolP)
3247 char *old_loop = loop;
3248 symp = symbol_get_value_expression (symp)->X_add_symbol;
3249 loop = concat (loop, " => ", S_GET_NAME (symp), NULL);
3253 as_bad (_("%s: would close weakref loop: %s"),
3254 S_GET_NAME (symbolP), loop);
3259 ignore_rest_of_line ();
3263 /* Short-circuiting instead of just checking here might speed
3264 things up a tiny little bit, but loop error messages would
3265 miss intermediate links. */
3266 /* symbolP2 = symp; */
3271 memset (&exp, 0, sizeof (exp));
3272 exp.X_op = O_symbol;
3273 exp.X_add_symbol = symbolP2;
3275 S_SET_SEGMENT (symbolP, undefined_section);
3276 symbol_set_value_expression (symbolP, &exp);
3277 symbol_set_frag (symbolP, &zero_address_frag);
3278 S_SET_WEAKREFR (symbolP);
3280 demand_empty_rest_of_line ();
3284 /* Verify that we are at the end of a line. If not, issue an error and
3288 demand_empty_rest_of_line (void)
3291 if (is_end_of_line[(unsigned char) *input_line_pointer])
3292 input_line_pointer++;
3295 if (ISPRINT (*input_line_pointer))
3296 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3297 *input_line_pointer);
3299 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3300 *input_line_pointer);
3301 ignore_rest_of_line ();
3304 /* Return pointing just after end-of-line. */
3305 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3308 /* Silently advance to the end of line. Use this after already having
3309 issued an error about something bad. */
3312 ignore_rest_of_line (void)
3314 while (input_line_pointer < buffer_limit
3315 && !is_end_of_line[(unsigned char) *input_line_pointer])
3316 input_line_pointer++;
3318 input_line_pointer++;
3320 /* Return pointing just after end-of-line. */
3321 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3324 /* Sets frag for given symbol to zero_address_frag, except when the
3325 symbol frag is already set to a dummy listing frag. */
3328 set_zero_frag (symbolS *symbolP)
3330 if (symbol_get_frag (symbolP)->fr_type != rs_dummy)
3331 symbol_set_frag (symbolP, &zero_address_frag);
3334 /* In: Pointer to a symbol.
3335 Input_line_pointer->expression.
3337 Out: Input_line_pointer->just after any whitespace after expression.
3338 Tried to set symbol to value of expression.
3339 Will change symbols type, value, and frag; */
3342 pseudo_set (symbolS *symbolP)
3347 know (symbolP); /* NULL pointer is logic error. */
3349 if (!S_IS_FORWARD_REF (symbolP))
3350 (void) expression (&exp);
3352 (void) deferred_expression (&exp);
3354 if (exp.X_op == O_illegal)
3355 as_bad (_("illegal expression"));
3356 else if (exp.X_op == O_absent)
3357 as_bad (_("missing expression"));
3358 else if (exp.X_op == O_big)
3360 if (exp.X_add_number > 0)
3361 as_bad (_("bignum invalid"));
3363 as_bad (_("floating point number invalid"));
3365 else if (exp.X_op == O_subtract
3366 && !S_IS_FORWARD_REF (symbolP)
3367 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
3368 && (symbol_get_frag (exp.X_add_symbol)
3369 == symbol_get_frag (exp.X_op_symbol)))
3371 exp.X_op = O_constant;
3372 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
3373 - S_GET_VALUE (exp.X_op_symbol));
3376 if (symbol_section_p (symbolP))
3378 as_bad ("attempt to set value of section symbol");
3387 exp.X_add_number = 0;
3390 S_SET_SEGMENT (symbolP, absolute_section);
3391 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3392 set_zero_frag (symbolP);
3396 S_SET_SEGMENT (symbolP, reg_section);
3397 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3398 set_zero_frag (symbolP);
3402 seg = S_GET_SEGMENT (exp.X_add_symbol);
3403 /* For x=undef+const, create an expression symbol.
3404 For x=x+const, just update x except when x is an undefined symbol
3405 For x=defined+const, evaluate x. */
3406 if (symbolP == exp.X_add_symbol
3407 && (seg != undefined_section
3408 || !symbol_constant_p (symbolP)))
3410 *symbol_X_add_number (symbolP) += exp.X_add_number;
3413 else if (!S_IS_FORWARD_REF (symbolP) && seg != undefined_section)
3415 symbolS *s = exp.X_add_symbol;
3417 if (S_IS_COMMON (s))
3418 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3419 S_GET_NAME (symbolP), S_GET_NAME (s));
3421 S_SET_SEGMENT (symbolP, seg);
3422 S_SET_VALUE (symbolP, exp.X_add_number + S_GET_VALUE (s));
3423 symbol_set_frag (symbolP, symbol_get_frag (s));
3424 copy_symbol_attributes (symbolP, s);
3427 S_SET_SEGMENT (symbolP, undefined_section);
3428 symbol_set_value_expression (symbolP, &exp);
3429 set_zero_frag (symbolP);
3433 /* The value is some complex expression. */
3434 S_SET_SEGMENT (symbolP, expr_section);
3435 symbol_set_value_expression (symbolP, &exp);
3436 set_zero_frag (symbolP);
3443 CONStruct more frag of .bytes, or .words etc.
3444 Should need_pass_2 be 1 then emit no frag(s).
3445 This understands EXPRESSIONS.
3449 This has a split personality. We use expression() to read the
3450 value. We can detect if the value won't fit in a byte or word.
3451 But we can't detect if expression() discarded significant digits
3452 in the case of a long. Not worth the crocks required to fix it. */
3454 /* Select a parser for cons expressions. */
3456 /* Some targets need to parse the expression in various fancy ways.
3457 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3458 (for example, the HPPA does this). Otherwise, you can define
3459 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3460 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3461 are defined, which is the normal case, then only simple expressions
3466 parse_mri_cons (expressionS *exp, unsigned int nbytes);
3469 #ifndef TC_PARSE_CONS_EXPRESSION
3470 #ifdef BITFIELD_CONS_EXPRESSIONS
3471 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3473 parse_bitfield_cons (expressionS *exp, unsigned int nbytes);
3475 #ifdef REPEAT_CONS_EXPRESSIONS
3476 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3478 parse_repeat_cons (expressionS *exp, unsigned int nbytes);
3481 /* If we haven't gotten one yet, just call expression. */
3482 #ifndef TC_PARSE_CONS_EXPRESSION
3483 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3488 do_parse_cons_expression (expressionS *exp,
3489 int nbytes ATTRIBUTE_UNUSED)
3491 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3495 /* Worker to do .byte etc statements.
3496 Clobbers input_line_pointer and checks end-of-line. */
3499 cons_worker (register int nbytes, /* 1=.byte, 2=.word, 4=.long. */
3507 #ifdef md_flush_pending_output
3508 md_flush_pending_output ();
3512 stop = mri_comment_field (&stopc);
3514 if (is_it_end_of_statement ())
3516 demand_empty_rest_of_line ();
3518 mri_comment_end (stop, stopc);
3522 #ifdef TC_ADDRESS_BYTES
3524 nbytes = TC_ADDRESS_BYTES ();
3527 #ifdef md_cons_align
3528 md_cons_align (nbytes);
3536 parse_mri_cons (&exp, (unsigned int) nbytes);
3539 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3543 if (exp.X_op == O_symbol)
3544 exp.X_op = O_symbol_rva;
3546 as_fatal (_("rva without symbol"));
3548 emit_expr (&exp, (unsigned int) nbytes);
3551 while (*input_line_pointer++ == ',');
3553 /* In MRI mode, after an odd number of bytes, we must align to an
3554 even word boundary, unless the next instruction is a dc.b, ds.b
3556 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3557 mri_pending_align = 1;
3559 input_line_pointer--; /* Put terminator back into stream. */
3561 demand_empty_rest_of_line ();
3564 mri_comment_end (stop, stopc);
3570 cons_worker (size, 0);
3576 cons_worker (size, 1);
3579 /* Put the contents of expression EXP into the object file using
3580 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3583 emit_expr (expressionS *exp, unsigned int nbytes)
3587 valueT extra_digit = 0;
3589 /* Don't do anything if we are going to make another pass. */
3593 dot_value = frag_now_fix ();
3597 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3598 appear as a four byte positive constant in the .line section,
3599 followed by a 2 byte 0xffff. Look for that case here. */
3601 static int dwarf_line = -1;
3603 if (strcmp (segment_name (now_seg), ".line") != 0)
3605 else if (dwarf_line >= 0
3607 && exp->X_op == O_constant
3608 && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
3609 listing_source_line ((unsigned int) dwarf_line);
3610 else if (nbytes == 4
3611 && exp->X_op == O_constant
3612 && exp->X_add_number >= 0)
3613 dwarf_line = exp->X_add_number;
3618 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3619 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3620 AT_sibling (0x12) followed by a four byte address of the sibling
3621 followed by a 2 byte AT_name (0x38) followed by the name of the
3622 file. We look for that case here. */
3624 static int dwarf_file = 0;
3626 if (strcmp (segment_name (now_seg), ".debug") != 0)
3628 else if (dwarf_file == 0
3630 && exp->X_op == O_constant
3631 && exp->X_add_number == 0x11)
3633 else if (dwarf_file == 1
3635 && exp->X_op == O_constant
3636 && exp->X_add_number == 0x12)
3638 else if (dwarf_file == 2
3641 else if (dwarf_file == 3
3643 && exp->X_op == O_constant
3644 && exp->X_add_number == 0x38)
3649 /* The variable dwarf_file_string tells stringer that the string
3650 may be the name of the source file. */
3651 if (dwarf_file == 4)
3652 dwarf_file_string = 1;
3654 dwarf_file_string = 0;
3659 if (check_eh_frame (exp, &nbytes))
3664 /* Allow `.word 0' in the absolute section. */
3665 if (now_seg == absolute_section)
3667 if (op != O_constant || exp->X_add_number != 0)
3668 as_bad (_("attempt to store value in absolute section"));
3669 abs_section_offset += nbytes;
3673 /* Handle a negative bignum. */
3675 && exp->X_add_number == 0
3676 && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
3677 && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
3680 unsigned long carry;
3682 exp = symbol_get_value_expression (exp->X_add_symbol);
3684 /* Negate the bignum: one's complement each digit and add 1. */
3686 for (i = 0; i < exp->X_add_number; i++)
3690 next = (((~(generic_bignum[i] & LITTLENUM_MASK))
3693 generic_bignum[i] = next & LITTLENUM_MASK;
3694 carry = next >> LITTLENUM_NUMBER_OF_BITS;
3697 /* We can ignore any carry out, because it will be handled by
3698 extra_digit if it is needed. */
3700 extra_digit = (valueT) -1;
3704 if (op == O_absent || op == O_illegal)
3706 as_warn (_("zero assumed for missing expression"));
3707 exp->X_add_number = 0;
3710 else if (op == O_big && exp->X_add_number <= 0)
3712 as_bad (_("floating point number invalid"));
3713 exp->X_add_number = 0;
3716 else if (op == O_register)
3718 as_warn (_("register value used as expression"));
3722 p = frag_more ((int) nbytes);
3724 #ifndef WORKING_DOT_WORD
3725 /* If we have the difference of two symbols in a word, save it on
3726 the broken_words list. See the code in write.c. */
3727 if (op == O_subtract && nbytes == 2)
3729 struct broken_word *x;
3731 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
3732 x->next_broken_word = broken_words;
3735 x->subseg = now_subseg;
3737 x->word_goes_here = p;
3739 x->add = exp->X_add_symbol;
3740 x->sub = exp->X_op_symbol;
3741 x->addnum = exp->X_add_number;
3749 /* If we have an integer, but the number of bytes is too large to
3750 pass to md_number_to_chars, handle it as a bignum. */
3751 if (op == O_constant && nbytes > sizeof (valueT))
3753 extra_digit = exp->X_unsigned ? 0 : -1;
3754 convert_to_bignum (exp);
3758 if (op == O_constant)
3760 register valueT get;
3761 register valueT use;
3762 register valueT mask;
3764 register valueT unmask;
3766 /* JF << of >= number of bits in the object is undefined. In
3767 particular SPARC (Sun 4) has problems. */
3768 if (nbytes >= sizeof (valueT))
3771 if (nbytes > sizeof (valueT))
3774 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3778 /* Don't store these bits. */
3779 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
3780 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3783 unmask = ~mask; /* Do store these bits. */
3786 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3787 mask = ~(unmask >> 1); /* Includes sign bit now. */
3790 get = exp->X_add_number;
3792 if ((get & mask) != 0
3793 && ((get & mask) != mask
3794 || (get & hibit) == 0))
3795 { /* Leading bits contain both 0s & 1s. */
3796 as_warn (_("value 0x%lx truncated to 0x%lx"),
3797 (unsigned long) get, (unsigned long) use);
3799 /* Put bytes in right order. */
3800 md_number_to_chars (p, use, (int) nbytes);
3802 else if (op == O_big)
3805 LITTLENUM_TYPE *nums;
3807 know (nbytes % CHARS_PER_LITTLENUM == 0);
3809 size = exp->X_add_number * CHARS_PER_LITTLENUM;
3812 as_warn (_("bignum truncated to %d bytes"), nbytes);
3816 if (target_big_endian)
3818 while (nbytes > size)
3820 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3821 nbytes -= CHARS_PER_LITTLENUM;
3822 p += CHARS_PER_LITTLENUM;
3825 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
3826 while (size >= CHARS_PER_LITTLENUM)
3829 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3830 size -= CHARS_PER_LITTLENUM;
3831 p += CHARS_PER_LITTLENUM;
3836 nums = generic_bignum;
3837 while (size >= CHARS_PER_LITTLENUM)
3839 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3841 size -= CHARS_PER_LITTLENUM;
3842 p += CHARS_PER_LITTLENUM;
3843 nbytes -= CHARS_PER_LITTLENUM;
3846 while (nbytes >= CHARS_PER_LITTLENUM)
3848 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3849 nbytes -= CHARS_PER_LITTLENUM;
3850 p += CHARS_PER_LITTLENUM;
3856 memset (p, 0, nbytes);
3858 /* Now we need to generate a fixS to record the symbol value. */
3860 #ifdef TC_CONS_FIX_NEW
3861 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
3864 bfd_reloc_code_real_type r;
3881 as_bad (_("unsupported BFD relocation size %u"), nbytes);
3885 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp,
3892 #ifdef BITFIELD_CONS_EXPRESSIONS
3894 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3895 w:x,y:z, where w and y are bitwidths and x and y are values. They
3896 then pack them all together. We do a little better in that we allow
3897 them in words, longs, etc. and we'll pack them in target byte order
3900 The rules are: pack least significant bit first, if a field doesn't
3901 entirely fit, put it in the next unit. Overflowing the bitfield is
3902 explicitly *not* even a warning. The bitwidth should be considered
3905 To use this function the tc-XXX.h file should define
3906 BITFIELD_CONS_EXPRESSIONS. */
3909 parse_bitfield_cons (exp, nbytes)
3911 unsigned int nbytes;
3913 unsigned int bits_available = BITS_PER_CHAR * nbytes;
3914 char *hold = input_line_pointer;
3916 (void) expression (exp);
3918 if (*input_line_pointer == ':')
3925 unsigned long width;
3927 if (*input_line_pointer != ':')
3929 input_line_pointer = hold;
3931 } /* Next piece is not a bitfield. */
3933 /* In the general case, we can't allow
3934 full expressions with symbol
3935 differences and such. The relocation
3936 entries for symbols not defined in this
3937 assembly would require arbitrary field
3938 widths, positions, and masks which most
3939 of our current object formats don't
3942 In the specific case where a symbol
3943 *is* defined in this assembly, we
3944 *could* build fixups and track it, but
3945 this could lead to confusion for the
3946 backends. I'm lazy. I'll take any
3947 SEG_ABSOLUTE. I think that means that
3948 you can use a previous .set or
3949 .equ type symbol. xoxorich. */
3951 if (exp->X_op == O_absent)
3953 as_warn (_("using a bit field width of zero"));
3954 exp->X_add_number = 0;
3955 exp->X_op = O_constant;
3956 } /* Implied zero width bitfield. */
3958 if (exp->X_op != O_constant)
3960 *input_line_pointer = '\0';
3961 as_bad (_("field width \"%s\" too complex for a bitfield"), hold);
3962 *input_line_pointer = ':';
3963 demand_empty_rest_of_line ();
3965 } /* Too complex. */
3967 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
3969 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
3970 width, nbytes, (BITS_PER_CHAR * nbytes));
3971 width = BITS_PER_CHAR * nbytes;
3974 if (width > bits_available)
3976 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
3977 input_line_pointer = hold;
3978 exp->X_add_number = value;
3983 hold = ++input_line_pointer;
3985 (void) expression (exp);
3986 if (exp->X_op != O_constant)
3988 char cache = *input_line_pointer;
3990 *input_line_pointer = '\0';
3991 as_bad (_("field value \"%s\" too complex for a bitfield"), hold);
3992 *input_line_pointer = cache;
3993 demand_empty_rest_of_line ();
3995 } /* Too complex. */
3997 value |= ((~(-1 << width) & exp->X_add_number)
3998 << ((BITS_PER_CHAR * nbytes) - bits_available));
4000 if ((bits_available -= width) == 0
4001 || is_it_end_of_statement ()
4002 || *input_line_pointer != ',')
4005 } /* All the bitfields we're gonna get. */
4007 hold = ++input_line_pointer;
4008 (void) expression (exp);
4011 exp->X_add_number = value;
4012 exp->X_op = O_constant;
4013 exp->X_unsigned = 1;
4017 #endif /* BITFIELD_CONS_EXPRESSIONS */
4019 /* Handle an MRI style string expression. */
4023 parse_mri_cons (exp, nbytes)
4025 unsigned int nbytes;
4027 if (*input_line_pointer != '\''
4028 && (input_line_pointer[1] != '\''
4029 || (*input_line_pointer != 'A'
4030 && *input_line_pointer != 'E')))
4031 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
4035 unsigned int result = 0;
4037 /* An MRI style string. Cut into as many bytes as will fit into
4038 a nbyte chunk, left justify if necessary, and separate with
4039 commas so we can try again later. */
4040 if (*input_line_pointer == 'A')
4041 ++input_line_pointer;
4042 else if (*input_line_pointer == 'E')
4044 as_bad (_("EBCDIC constants are not supported"));
4045 ++input_line_pointer;
4048 input_line_pointer++;
4049 for (scan = 0; scan < nbytes; scan++)
4051 if (*input_line_pointer == '\'')
4053 if (input_line_pointer[1] == '\'')
4055 input_line_pointer++;
4060 result = (result << 8) | (*input_line_pointer++);
4064 while (scan < nbytes)
4070 /* Create correct expression. */
4071 exp->X_op = O_constant;
4072 exp->X_add_number = result;
4074 /* Fake it so that we can read the next char too. */
4075 if (input_line_pointer[0] != '\'' ||
4076 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
4078 input_line_pointer -= 2;
4079 input_line_pointer[0] = ',';
4080 input_line_pointer[1] = '\'';
4083 input_line_pointer++;
4086 #endif /* TC_M68K */
4088 #ifdef REPEAT_CONS_EXPRESSIONS
4090 /* Parse a repeat expression for cons. This is used by the MIPS
4091 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4092 object file COUNT times.
4094 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4097 parse_repeat_cons (exp, nbytes)
4099 unsigned int nbytes;
4106 if (*input_line_pointer != ':')
4108 /* No repeat count. */
4112 ++input_line_pointer;
4113 expression (&count);
4114 if (count.X_op != O_constant
4115 || count.X_add_number <= 0)
4117 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4121 /* The cons function is going to output this expression once. So we
4122 output it count - 1 times. */
4123 for (i = count.X_add_number - 1; i > 0; i--)
4124 emit_expr (exp, nbytes);
4127 #endif /* REPEAT_CONS_EXPRESSIONS */
4129 /* Parse a floating point number represented as a hex constant. This
4130 permits users to specify the exact bits they want in the floating
4134 hex_float (int float_type, char *bytes)
4166 as_bad (_("unknown floating type type '%c'"), float_type);
4170 /* It would be nice if we could go through expression to parse the
4171 hex constant, but if we get a bignum it's a pain to sort it into
4172 the buffer correctly. */
4174 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
4178 /* The MRI assembler accepts arbitrary underscores strewn about
4179 through the hex constant, so we ignore them as well. */
4180 if (*input_line_pointer == '_')
4182 ++input_line_pointer;
4188 as_warn (_("floating point constant too large"));
4191 d = hex_value (*input_line_pointer) << 4;
4192 ++input_line_pointer;
4193 while (*input_line_pointer == '_')
4194 ++input_line_pointer;
4195 if (hex_p (*input_line_pointer))
4197 d += hex_value (*input_line_pointer);
4198 ++input_line_pointer;
4200 if (target_big_endian)
4203 bytes[length - i - 1] = d;
4209 if (target_big_endian)
4210 memset (bytes + i, 0, length - i);
4212 memset (bytes, 0, length - i);
4220 CONStruct some more frag chars of .floats .ffloats etc.
4221 Makes 0 or more new frags.
4222 If need_pass_2 == 1, no frags are emitted.
4223 This understands only floating literals, not expressions. Sorry.
4225 A floating constant is defined by atof_generic(), except it is preceded
4226 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4227 reading, I decided to be incompatible. This always tries to give you
4228 rounded bits to the precision of the pseudo-op. Former AS did premature
4229 truncation, restored noisy bits instead of trailing 0s AND gave you
4230 a choice of 2 flavours of noise according to which of 2 floating-point
4231 scanners you directed AS to use.
4233 In: input_line_pointer->whitespace before, or '0' of flonum. */
4236 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4237 register int float_type /* 'f':.ffloat ... 'F':.float ... */)
4240 int length; /* Number of chars in an object. */
4241 register char *err; /* Error from scanning floating literal. */
4242 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
4244 if (is_it_end_of_statement ())
4246 demand_empty_rest_of_line ();
4250 #ifdef md_flush_pending_output
4251 md_flush_pending_output ();
4256 /* input_line_pointer->1st char of a flonum (we hope!). */
4259 /* Skip any 0{letter} that may be present. Don't even check if the
4260 letter is legal. Someone may invent a "z" format and this routine
4261 has no use for such information. Lusers beware: you get
4262 diagnostics if your input is ill-conditioned. */
4263 if (input_line_pointer[0] == '0'
4264 && ISALPHA (input_line_pointer[1]))
4265 input_line_pointer += 2;
4267 /* Accept :xxxx, where the x's are hex digits, for a floating
4268 point with the exact digits specified. */
4269 if (input_line_pointer[0] == ':')
4271 ++input_line_pointer;
4272 length = hex_float (float_type, temp);
4275 ignore_rest_of_line ();
4281 err = md_atof (float_type, temp, &length);
4282 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
4286 as_bad (_("bad floating literal: %s"), err);
4287 ignore_rest_of_line ();
4298 #ifdef REPEAT_CONS_EXPRESSIONS
4299 if (*input_line_pointer == ':')
4301 expressionS count_exp;
4303 ++input_line_pointer;
4304 expression (&count_exp);
4306 if (count_exp.X_op != O_constant
4307 || count_exp.X_add_number <= 0)
4308 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4310 count = count_exp.X_add_number;
4314 while (--count >= 0)
4316 p = frag_more (length);
4317 memcpy (p, temp, (unsigned int) length);
4322 while (*input_line_pointer++ == ',');
4324 /* Put terminator back into stream. */
4325 --input_line_pointer;
4326 demand_empty_rest_of_line ();
4329 /* Return the size of a LEB128 value. */
4332 sizeof_sleb128 (offsetT value)
4334 register int size = 0;
4335 register unsigned byte;
4339 byte = (value & 0x7f);
4340 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4341 Fortunately, we can structure things so that the extra work reduces
4342 to a noop on systems that do things "properly". */
4343 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4346 while (!(((value == 0) && ((byte & 0x40) == 0))
4347 || ((value == -1) && ((byte & 0x40) != 0))));
4353 sizeof_uleb128 (valueT value)
4355 register int size = 0;
4356 register unsigned byte;
4360 byte = (value & 0x7f);
4370 sizeof_leb128 (valueT value, int sign)
4373 return sizeof_sleb128 ((offsetT) value);
4375 return sizeof_uleb128 (value);
4378 /* Output a LEB128 value. */
4381 output_sleb128 (char *p, offsetT value)
4383 register char *orig = p;
4388 unsigned byte = (value & 0x7f);
4390 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4391 Fortunately, we can structure things so that the extra work reduces
4392 to a noop on systems that do things "properly". */
4393 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4395 more = !((((value == 0) && ((byte & 0x40) == 0))
4396 || ((value == -1) && ((byte & 0x40) != 0))));
4408 output_uleb128 (char *p, valueT value)
4414 unsigned byte = (value & 0x7f);
4417 /* More bytes to follow. */
4428 output_leb128 (char *p, valueT value, int sign)
4431 return output_sleb128 (p, (offsetT) value);
4433 return output_uleb128 (p, value);
4436 /* Do the same for bignums. We combine sizeof with output here in that
4437 we don't output for NULL values of P. It isn't really as critical as
4438 for "normal" values that this be streamlined. */
4441 output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
4448 /* Strip leading sign extensions off the bignum. */
4450 && bignum[size - 1] == LITTLENUM_MASK
4451 && bignum[size - 2] > LITTLENUM_MASK / 2)
4456 /* OR in the next part of the littlenum. */
4457 val |= (*bignum << loaded);
4458 loaded += LITTLENUM_NUMBER_OF_BITS;
4462 /* Add bytes until there are less than 7 bits left in VAL
4463 or until every non-sign bit has been written. */
4470 || val != ((byte & 0x40) == 0 ? 0 : ((valueT) 1 << loaded) - 1))
4477 while ((byte & 0x80) != 0 && loaded >= 7);
4481 /* Mop up any left-over bits (of which there will be less than 7). */
4482 if ((byte & 0x80) != 0)
4484 /* Sign-extend VAL. */
4485 if (val & (1 << (loaded - 1)))
4486 val |= ~0 << loaded;
4496 output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
4503 /* Strip leading zeros off the bignum. */
4504 /* XXX: Is this needed? */
4505 while (size > 0 && bignum[size - 1] == 0)
4510 if (loaded < 7 && size > 0)
4512 val |= (*bignum << loaded);
4513 loaded += 8 * CHARS_PER_LITTLENUM;
4522 if (size > 0 || val)
4529 while (byte & 0x80);
4535 output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, int size, int sign)
4538 return output_big_sleb128 (p, bignum, size);
4540 return output_big_uleb128 (p, bignum, size);
4543 /* Generate the appropriate fragments for a given expression to emit a
4547 emit_leb128_expr (expressionS *exp, int sign)
4549 operatorT op = exp->X_op;
4550 unsigned int nbytes;
4552 if (op == O_absent || op == O_illegal)
4554 as_warn (_("zero assumed for missing expression"));
4555 exp->X_add_number = 0;
4558 else if (op == O_big && exp->X_add_number <= 0)
4560 as_bad (_("floating point number invalid"));
4561 exp->X_add_number = 0;
4564 else if (op == O_register)
4566 as_warn (_("register value used as expression"));
4569 else if (op == O_constant
4571 && (exp->X_add_number < 0) != !exp->X_unsigned)
4573 /* We're outputting a signed leb128 and the sign of X_add_number
4574 doesn't reflect the sign of the original value. Convert EXP
4575 to a correctly-extended bignum instead. */
4576 convert_to_bignum (exp);
4580 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
4581 a signal that this is leb128 data. It shouldn't optimize this away. */
4582 nbytes = (unsigned int) -1;
4583 if (check_eh_frame (exp, &nbytes))
4586 /* Let the backend know that subsequent data may be byte aligned. */
4587 #ifdef md_cons_align
4591 if (op == O_constant)
4593 /* If we've got a constant, emit the thing directly right now. */
4595 valueT value = exp->X_add_number;
4599 size = sizeof_leb128 (value, sign);
4600 p = frag_more (size);
4601 output_leb128 (p, value, sign);
4603 else if (op == O_big)
4605 /* O_big is a different sort of constant. */
4610 size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
4611 p = frag_more (size);
4612 output_big_leb128 (p, generic_bignum, exp->X_add_number, sign);
4616 /* Otherwise, we have to create a variable sized fragment and
4617 resolve things later. */
4619 frag_var (rs_leb128, sizeof_uleb128 (~(valueT) 0), 0, sign,
4620 make_expr_symbol (exp), 0, (char *) NULL);
4624 /* Parse the .sleb128 and .uleb128 pseudos. */
4631 #ifdef md_flush_pending_output
4632 md_flush_pending_output ();
4638 emit_leb128_expr (&exp, sign);
4640 while (*input_line_pointer++ == ',');
4642 input_line_pointer--;
4643 demand_empty_rest_of_line ();
4646 /* We read 0 or more ',' separated, double-quoted strings.
4647 Caller should have checked need_pass_2 is FALSE because we don't
4651 stringer (/* Worker to do .ascii etc statements. */
4652 /* Checks end-of-line. */
4653 register int append_zero /* 0: don't append '\0', else 1. */)
4655 register unsigned int c;
4658 #ifdef md_flush_pending_output
4659 md_flush_pending_output ();
4662 /* The following awkward logic is to parse ZERO or more strings,
4663 comma separated. Recall a string expression includes spaces
4664 before the opening '\"' and spaces after the closing '\"'.
4665 We fake a leading ',' if there is (supposed to be)
4666 a 1st, expression. We keep demanding expressions for each ','. */
4667 if (is_it_end_of_statement ())
4669 c = 0; /* Skip loop. */
4670 ++input_line_pointer; /* Compensate for end of loop. */
4674 c = ','; /* Do loop. */
4676 /* If we have been switched into the abs_section then we
4677 will not have an obstack onto which we can hang strings. */
4678 if (now_seg == absolute_section)
4680 as_bad (_("strings must be placed into a section"));
4682 ignore_rest_of_line ();
4685 while (c == ',' || c == '<' || c == '"')
4688 switch (*input_line_pointer)
4691 ++input_line_pointer; /*->1st char of string. */
4692 start = input_line_pointer;
4693 while (is_a_char (c = next_char_of_string ()))
4695 FRAG_APPEND_1_CHAR (c);
4699 FRAG_APPEND_1_CHAR (0);
4701 know (input_line_pointer[-1] == '\"');
4705 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
4706 will emit .string with a filename in the .debug section
4707 after a sequence of constants. See the comment in
4708 emit_expr for the sequence. emit_expr will set
4709 dwarf_file_string to non-zero if this string might be a
4710 source file name. */
4711 if (strcmp (segment_name (now_seg), ".debug") != 0)
4712 dwarf_file_string = 0;
4713 else if (dwarf_file_string)
4715 c = input_line_pointer[-1];
4716 input_line_pointer[-1] = '\0';
4717 listing_source_file (start);
4718 input_line_pointer[-1] = c;
4725 input_line_pointer++;
4726 c = get_single_number ();
4727 FRAG_APPEND_1_CHAR (c);
4728 if (*input_line_pointer != '>')
4730 as_bad (_("expected <nn>"));
4732 input_line_pointer++;
4735 input_line_pointer++;
4739 c = *input_line_pointer;
4742 demand_empty_rest_of_line ();
4745 /* FIXME-SOMEDAY: I had trouble here on characters with the
4746 high bits set. We'll probably also have trouble with
4747 multibyte chars, wide chars, etc. Also be careful about
4748 returning values bigger than 1 byte. xoxorich. */
4751 next_char_of_string (void)
4753 register unsigned int c;
4755 c = *input_line_pointer++ & CHAR_MASK;
4763 as_warn (_("unterminated string; newline inserted"));
4764 bump_line_counters ();
4767 #ifndef NO_STRING_ESCAPES
4769 switch (c = *input_line_pointer++)
4797 break; /* As itself. */
4813 for (i = 0, number = 0;
4814 ISDIGIT (c) && i < 3;
4815 c = *input_line_pointer++, i++)
4817 number = number * 8 + c - '0';
4822 --input_line_pointer;
4831 c = *input_line_pointer++;
4832 while (ISXDIGIT (c))
4835 number = number * 16 + c - '0';
4836 else if (ISUPPER (c))
4837 number = number * 16 + c - 'A' + 10;
4839 number = number * 16 + c - 'a' + 10;
4840 c = *input_line_pointer++;
4843 --input_line_pointer;
4848 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
4849 as_warn (_("unterminated string; newline inserted"));
4851 bump_line_counters ();
4856 #ifdef ONLY_STANDARD_ESCAPES
4857 as_bad (_("bad escaped character in string"));
4859 #endif /* ONLY_STANDARD_ESCAPES */
4864 #endif /* ! defined (NO_STRING_ESCAPES) */
4873 get_segmented_expression (register expressionS *expP)
4875 register segT retval;
4877 retval = expression (expP);
4878 if (expP->X_op == O_illegal
4879 || expP->X_op == O_absent
4880 || expP->X_op == O_big)
4882 as_bad (_("expected address expression"));
4883 expP->X_op = O_constant;
4884 expP->X_add_number = 0;
4885 retval = absolute_section;
4891 get_known_segmented_expression (register expressionS *expP)
4893 register segT retval;
4895 if ((retval = get_segmented_expression (expP)) == undefined_section)
4897 /* There is no easy way to extract the undefined symbol from the
4899 if (expP->X_add_symbol != NULL
4900 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
4901 as_warn (_("symbol \"%s\" undefined; zero assumed"),
4902 S_GET_NAME (expP->X_add_symbol));
4904 as_warn (_("some symbol undefined; zero assumed"));
4905 retval = absolute_section;
4906 expP->X_op = O_constant;
4907 expP->X_add_number = 0;
4909 know (retval == absolute_section || SEG_NORMAL (retval));
4913 char /* Return terminator. */
4914 get_absolute_expression_and_terminator (long *val_pointer /* Return value of expression. */)
4916 /* FIXME: val_pointer should probably be offsetT *. */
4917 *val_pointer = (long) get_absolute_expression ();
4918 return (*input_line_pointer++);
4921 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
4922 Give a warning if that happens. */
4925 demand_copy_C_string (int *len_pointer)
4929 if ((s = demand_copy_string (len_pointer)) != 0)
4933 for (len = *len_pointer; len > 0; len--)
4940 as_bad (_("this string may not contain \'\\0\'"));
4948 /* Demand string, but return a safe (=private) copy of the string.
4949 Return NULL if we can't read a string here. */
4952 demand_copy_string (int *lenP)
4954 register unsigned int c;
4960 if (*input_line_pointer == '\"')
4962 input_line_pointer++; /* Skip opening quote. */
4964 while (is_a_char (c = next_char_of_string ()))
4966 obstack_1grow (¬es, c);
4969 /* JF this next line is so demand_copy_C_string will return a
4970 null terminated string. */
4971 obstack_1grow (¬es, '\0');
4972 retval = obstack_finish (¬es);
4976 as_bad (_("missing string"));
4978 ignore_rest_of_line ();
4984 /* In: Input_line_pointer->next character.
4986 Do: Skip input_line_pointer over all whitespace.
4988 Out: 1 if input_line_pointer->end-of-line. */
4991 is_it_end_of_statement (void)
4994 return (is_end_of_line[(unsigned char) *input_line_pointer]);
4998 equals (char *sym_name, int reassign)
5003 input_line_pointer++;
5004 if (*input_line_pointer == '=')
5005 input_line_pointer++;
5006 if (reassign < 0 && *input_line_pointer == '=')
5007 input_line_pointer++;
5009 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
5010 input_line_pointer++;
5013 stop = mri_comment_field (&stopc);
5015 assign_symbol (sym_name, reassign >= 0 ? !reassign : reassign);
5019 demand_empty_rest_of_line ();
5020 mri_comment_end (stop, stopc);
5024 /* .incbin -- include a file verbatim at the current location. */
5027 s_incbin (int x ATTRIBUTE_UNUSED)
5038 #ifdef md_flush_pending_output
5039 md_flush_pending_output ();
5043 filename = demand_copy_string (& len);
5044 if (filename == NULL)
5049 /* Look for optional skip and count. */
5050 if (* input_line_pointer == ',')
5052 ++ input_line_pointer;
5053 skip = get_absolute_expression ();
5057 if (* input_line_pointer == ',')
5059 ++ input_line_pointer;
5061 count = get_absolute_expression ();
5063 as_warn (_(".incbin count zero, ignoring `%s'"), filename);
5069 demand_empty_rest_of_line ();
5071 /* Try opening absolute path first, then try include dirs. */
5072 binfile = fopen (filename, FOPEN_RB);
5073 if (binfile == NULL)
5077 path = xmalloc ((unsigned long) len + include_dir_maxlen + 5);
5079 for (i = 0; i < include_dir_count; i++)
5081 sprintf (path, "%s/%s", include_dirs[i], filename);
5083 binfile = fopen (path, FOPEN_RB);
5084 if (binfile != NULL)
5088 if (binfile == NULL)
5089 as_bad (_("file not found: %s"), filename);
5092 path = xstrdup (filename);
5098 register_dependency (path);
5100 /* Compute the length of the file. */
5101 if (fseek (binfile, 0, SEEK_END) != 0)
5103 as_bad (_("seek to end of .incbin file failed `%s'"), path);
5106 file_len = ftell (binfile);
5108 /* If a count was not specified use the remainder of the file. */
5110 count = file_len - skip;
5112 if (skip < 0 || count < 0 || file_len < 0 || skip + count > file_len)
5114 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5115 skip, count, file_len);
5119 if (fseek (binfile, skip, SEEK_SET) != 0)
5121 as_bad (_("could not skip to %ld in file `%s'"), skip, path);
5125 /* Allocate frag space and store file contents in it. */
5126 binfrag = frag_more (count);
5128 bytes = fread (binfrag, 1, count, binfile);
5130 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5131 path, bytes, count);
5134 if (binfile != NULL)
5140 /* .include -- include a file at this point. */
5143 s_include (int arg ATTRIBUTE_UNUSED)
5152 filename = demand_copy_string (&i);
5153 if (filename == NULL)
5155 /* demand_copy_string has already printed an error and
5156 called ignore_rest_of_line. */
5164 while (!is_end_of_line[(unsigned char) *input_line_pointer]
5165 && *input_line_pointer != ' '
5166 && *input_line_pointer != '\t')
5168 obstack_1grow (¬es, *input_line_pointer);
5169 ++input_line_pointer;
5173 obstack_1grow (¬es, '\0');
5174 filename = obstack_finish (¬es);
5175 while (!is_end_of_line[(unsigned char) *input_line_pointer])
5176 ++input_line_pointer;
5179 demand_empty_rest_of_line ();
5180 path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ );
5182 for (i = 0; i < include_dir_count; i++)
5184 strcpy (path, include_dirs[i]);
5186 strcat (path, filename);
5187 if (0 != (try = fopen (path, FOPEN_RT)))
5197 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5198 register_dependency (path);
5199 input_scrub_insert_file (path);
5203 add_include_dir (char *path)
5207 if (include_dir_count == 0)
5209 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
5210 include_dirs[0] = "."; /* Current dir. */
5211 include_dir_count = 2;
5215 include_dir_count++;
5217 (char **) realloc (include_dirs,
5218 include_dir_count * sizeof (*include_dirs));
5221 include_dirs[include_dir_count - 1] = path; /* New one. */
5224 if (i > include_dir_maxlen)
5225 include_dir_maxlen = i;
5228 /* Output debugging information to denote the source file. */
5231 generate_file_debug (void)
5233 if (debug_type == DEBUG_STABS)
5234 stabs_generate_asm_file ();
5237 /* Output line number debugging information for the current source line. */
5240 generate_lineno_debug (void)
5244 case DEBUG_UNSPECIFIED:
5249 stabs_generate_asm_lineno ();
5252 ecoff_generate_asm_lineno ();
5255 /* ??? We could here indicate to dwarf2dbg.c that something
5256 has changed. However, since there is additional backend
5257 support that is required (calling dwarf2_emit_insn), we
5258 let dwarf2dbg.c call as_where on its own. */
5263 /* Output debugging information to mark a function entry point or end point.
5264 END_P is zero for .func, and non-zero for .endfunc. */
5269 do_s_func (end_p, NULL);
5272 /* Subroutine of s_func so targets can choose a different default prefix.
5273 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5276 do_s_func (int end_p, const char *default_prefix)
5278 /* Record the current function so that we can issue an error message for
5279 misplaced .func,.endfunc, and also so that .endfunc needs no
5281 static char *current_name;
5282 static char *current_label;
5286 if (current_name == NULL)
5288 as_bad (_("missing .func"));
5289 ignore_rest_of_line ();
5293 if (debug_type == DEBUG_STABS)
5294 stabs_generate_asm_endfunc (current_name, current_label);
5296 current_name = current_label = NULL;
5301 char delim1, delim2;
5303 if (current_name != NULL)
5305 as_bad (_(".endfunc missing for previous .func"));
5306 ignore_rest_of_line ();
5310 name = input_line_pointer;
5311 delim1 = get_symbol_end ();
5312 name = xstrdup (name);
5313 *input_line_pointer = delim1;
5315 if (*input_line_pointer != ',')
5318 asprintf (&label, "%s%s", default_prefix, name);
5321 char leading_char = bfd_get_symbol_leading_char (stdoutput);
5322 /* Missing entry point, use function's name with the leading
5325 asprintf (&label, "%c%s", leading_char, name);
5332 ++input_line_pointer;
5334 label = input_line_pointer;
5335 delim2 = get_symbol_end ();
5336 label = xstrdup (label);
5337 *input_line_pointer = delim2;
5340 if (debug_type == DEBUG_STABS)
5341 stabs_generate_asm_func (name, label);
5343 current_name = name;
5344 current_label = label;
5347 demand_empty_rest_of_line ();
5351 s_ignore (int arg ATTRIBUTE_UNUSED)
5353 ignore_rest_of_line ();
5357 read_print_statistics (FILE *file)
5359 hash_print_statistics (file, "pseudo-op table", po_hash);
5362 /* Inserts the given line into the input stream.
5364 This call avoids macro/conditionals nesting checking, since the contents of
5365 the line are assumed to replace the contents of a line already scanned.
5367 An appropriate use of this function would be substitution of input lines when
5368 called by md_start_line_hook(). The given line is assumed to already be
5369 properly scrubbed. */
5372 input_scrub_insert_line (const char *line)
5376 sb_add_string (&newline, line);
5377 input_scrub_include_sb (&newline, input_line_pointer, 0);
5379 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5382 /* Insert a file into the input stream; the path must resolve to an actual
5383 file; no include path searching or dependency registering is performed. */
5386 input_scrub_insert_file (char *path)
5388 input_scrub_include_file (path, input_line_pointer);
5389 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5392 /* Find the end of a line, considering quotation and escaping of quotes. */
5394 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5395 # define TC_SINGLE_QUOTE_STRINGS 1
5399 _find_end_of_line (char *s, int mri_string, int insn ATTRIBUTE_UNUSED)
5401 char inquote = '\0';
5404 while (!is_end_of_line[(unsigned char) *s]
5405 || (inquote && !ISCNTRL (*s))
5406 || (inquote == '\'' && flag_mri)
5407 #ifdef TC_EOL_IN_INSN
5408 || (insn && TC_EOL_IN_INSN (s))
5412 if (mri_string && *s == '\'')
5416 else if (*s == '\\')
5420 #ifdef TC_SINGLE_QUOTE_STRINGS
5421 || (TC_SINGLE_QUOTE_STRINGS && *s == '\'')
5428 as_warn (_("missing closing `%c'"), inquote);
5430 as_warn (_("stray `\\'"));
5435 find_end_of_line (char *s, int mri_string)
5437 return _find_end_of_line (s, mri_string, 0);