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, 2006, 2007
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"
42 #include "dw2gencfi.h"
44 #ifndef TC_START_LABEL
45 #define TC_START_LABEL(x,y) (x == ':')
48 /* Set by the object-format or the target. */
49 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
50 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
55 else if ((SIZE) >= 4) \
57 else if ((SIZE) >= 2) \
65 char *input_line_pointer; /*->next char of source file to parse. */
67 #if BITS_PER_CHAR != 8
68 /* The following table is indexed by[(char)] and will break if
69 a char does not have exactly 256 states (hopefully 0:255!)! */
78 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
83 /* The Delta 68k assembler permits % inside label names. */
88 /* The PowerPC Windows NT assemblers permits ? inside label names. */
93 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
94 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
103 /* The Delta 68k assembler permits ~ at start of label names. */
107 /* Used by is_... macros. our ctype[]. */
108 char lex_type[256] = {
109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
110 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
111 0, 0, 0, LEX_HASH, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
112 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
113 LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
114 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
115 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
116 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */
117 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
118 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
119 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
120 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
121 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
122 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
123 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
124 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
128 Out: 1 if this character ends a line. */
129 char is_end_of_line[256] = {
131 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
133 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
135 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
136 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
137 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
140 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
141 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
142 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
143 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
144 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
145 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
146 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
147 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
148 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
152 #ifndef TC_CASE_SENSITIVE
153 char original_case_string[128];
156 /* Functions private to this file. */
158 static char *buffer; /* 1st char of each buffer of lines is here. */
159 static char *buffer_limit; /*->1 + last char in buffer. */
161 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
162 in the tc-<CPU>.h file. See the "Porting GAS" section of the
164 int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
166 /* Variables for handling include file directory table. */
168 /* Table of pointers to directories to search for .include's. */
171 /* How many are in the table. */
172 int include_dir_count;
174 /* Length of longest in table. */
175 int include_dir_maxlen = 1;
177 #ifndef WORKING_DOT_WORD
178 struct broken_word *broken_words;
179 int new_broken_words;
182 /* The current offset into the absolute section. We don't try to
183 build frags in the absolute section, since no data can be stored
184 there. We just keep track of the current offset. */
185 addressT abs_section_offset;
187 /* If this line had an MRI style label, it is stored in this variable.
188 This is used by some of the MRI pseudo-ops. */
191 /* This global variable is used to support MRI common sections. We
192 translate such sections into a common symbol. This variable is
193 non-NULL when we are in an MRI common section. */
194 symbolS *mri_common_symbol;
196 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
197 need to align to an even byte boundary unless the next pseudo-op is
198 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
200 static int mri_pending_align;
204 /* This variable is set to be non-zero if the next string we see might
205 be the name of the source file in DWARF debugging information. See
206 the comment in emit_expr for the format we look for. */
207 static int dwarf_file_string;
211 static void do_s_func (int end_p, const char *default_prefix);
212 static void do_align (int, char *, int, int);
213 static void s_align (int, int);
214 static void s_altmacro (int);
215 static void s_bad_end (int);
216 static int hex_float (int, char *);
217 static segT get_known_segmented_expression (expressionS * expP);
218 static void pobegin (void);
219 static int get_line_sb (sb *);
220 static void generate_file_debug (void);
221 static char *_find_end_of_line (char *, int, int);
229 obj_read_begin_hook ();
231 /* Something close -- but not too close -- to a multiple of 1024.
232 The debugging malloc I'm using has 24 bytes of overhead. */
233 obstack_begin (¬es, chunksize);
234 obstack_begin (&cond_obstack, chunksize);
236 /* Use machine dependent syntax. */
237 for (p = line_separator_chars; *p; p++)
238 is_end_of_line[(unsigned char) *p] = 1;
239 /* Use more. FIXME-SOMEDAY. */
245 #ifndef TC_ADDRESS_BYTES
246 #define TC_ADDRESS_BYTES address_bytes
251 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
252 contain an address. */
253 int n = (stdoutput->arch_info->bits_per_address - 1) / 8;
261 /* Set up pseudo-op tables. */
263 static struct hash_control *po_hash;
265 static const pseudo_typeS potable[] = {
266 {"abort", s_abort, 0},
267 {"align", s_align_ptwo, 0},
268 {"altmacro", s_altmacro, 1},
269 {"ascii", stringer, 0},
270 {"asciz", stringer, 1},
271 {"balign", s_align_bytes, 0},
272 {"balignw", s_align_bytes, -2},
273 {"balignl", s_align_bytes, -4},
277 {"common", s_mri_common, 0},
278 {"common.s", s_mri_common, 1},
281 #ifdef TC_ADDRESS_BYTES
285 {"dc.d", float_cons, 'd'},
287 {"dc.s", float_cons, 'f'},
289 {"dc.x", float_cons, 'x'},
291 {"dcb.b", s_space, 1},
292 {"dcb.d", s_float_space, 'd'},
293 {"dcb.l", s_space, 4},
294 {"dcb.s", s_float_space, 'f'},
295 {"dcb.w", s_space, 2},
296 {"dcb.x", s_float_space, 'x'},
298 {"ds.b", s_space, 1},
299 {"ds.d", s_space, 8},
300 {"ds.l", s_space, 4},
301 {"ds.p", s_space, 12},
302 {"ds.s", s_space, 4},
303 {"ds.w", s_space, 2},
304 {"ds.x", s_space, 12},
305 {"debug", s_ignore, 0},
310 {"double", float_cons, 'd'},
312 {"eject", listing_eject, 0}, /* Formfeed listing. */
314 {"elsec", s_else, 0},
315 {"elseif", s_elseif, (int) O_ne},
317 {"endc", s_endif, 0},
318 {"endfunc", s_func, 1},
319 {"endif", s_endif, 0},
320 {"endm", s_bad_end, 0},
321 {"endr", s_bad_end, 1},
327 {"error", s_errwarn, 1},
328 {"exitm", s_mexit, 0},
330 {"extern", s_ignore, 0}, /* We treat all undef as ext. */
331 {"appfile", s_app_file, 1},
332 {"appline", s_app_line, 1},
334 {"file", s_app_file, 0},
336 {"float", float_cons, 'f'},
337 {"format", s_ignore, 0},
339 {"global", s_globl, 0},
340 {"globl", s_globl, 0},
342 {"if", s_if, (int) O_ne},
345 {"ifdef", s_ifdef, 0},
346 {"ifeq", s_if, (int) O_eq},
347 {"ifeqs", s_ifeqs, 0},
348 {"ifge", s_if, (int) O_ge},
349 {"ifgt", s_if, (int) O_gt},
350 {"ifle", s_if, (int) O_le},
351 {"iflt", s_if, (int) O_lt},
354 {"ifndef", s_ifdef, 1},
355 {"ifne", s_if, (int) O_ne},
356 {"ifnes", s_ifeqs, 1},
357 {"ifnotdef", s_ifdef, 1},
358 {"incbin", s_incbin, 0},
359 {"include", s_include, 0},
365 {"lcomm", s_lcomm, 0},
366 {"lflags", listing_flags, 0}, /* Listing flags. */
367 {"linefile", s_app_line, 0},
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 s = input_line_pointer;
1012 if (strncmp (s, "APP\n", 4))
1015 ignore_rest_of_line ();
1018 bump_line_counters ();
1022 ends = strstr (s, "#NO_APP\n");
1026 unsigned int tmp_len;
1029 /* The end of the #APP wasn't in this buffer. We
1030 keep reading in buffers until we find the #NO_APP
1031 that goes with this #APP There is one. The specs
1033 tmp_len = buffer_limit - s;
1034 tmp_buf = xmalloc (tmp_len + 1);
1035 memcpy (tmp_buf, s, tmp_len);
1038 new_tmp = input_scrub_next_buffer (&buffer);
1042 buffer_limit = new_tmp;
1043 input_line_pointer = buffer;
1044 ends = strstr (buffer, "#NO_APP\n");
1046 num = ends - buffer;
1048 num = buffer_limit - buffer;
1050 tmp_buf = xrealloc (tmp_buf, tmp_len + num);
1051 memcpy (tmp_buf + tmp_len, buffer, num);
1056 input_line_pointer = ends ? ends + 8 : NULL;
1064 input_line_pointer = ends + 8;
1068 scrub_string_end = ends;
1070 new_length = ends - s;
1071 new_buf = (char *) xmalloc (new_length);
1078 space = (new_buf + new_length) - new_tmp;
1079 size = do_scrub_chars (scrub_from_string, new_tmp, space);
1087 new_buf = xrealloc (new_buf, new_length + 100);
1088 new_tmp = new_buf + new_length;
1095 /* We've "scrubbed" input to the preferred format. In the
1096 process we may have consumed the whole of the remaining
1097 file (and included files). We handle this formatted
1098 input similar to that of macro expansion, letting
1099 actual macro expansion (possibly nested) and other
1100 input expansion work. Beware that in messages, line
1101 numbers and possibly file names will be incorrect. */
1102 sb_add_string (&sbuf, new_buf);
1103 input_scrub_include_sb (&sbuf, input_line_pointer, 0);
1105 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1110 HANDLE_CONDITIONAL_ASSEMBLY ();
1112 #ifdef tc_unrecognized_line
1113 if (tc_unrecognized_line (c))
1116 input_line_pointer--;
1117 /* Report unknown char as error. */
1118 demand_empty_rest_of_line ();
1121 #ifdef md_after_pass_hook
1122 md_after_pass_hook ();
1131 /* Close the input file. */
1132 input_scrub_close ();
1133 #ifdef WARN_COMMENTS
1135 if (warn_comment && found_comment)
1136 as_warn_where (found_comment_file, found_comment,
1137 "first comment found here");
1142 /* Convert O_constant expression EXP into the equivalent O_big representation.
1143 Take the sign of the number from X_unsigned rather than X_add_number. */
1146 convert_to_bignum (expressionS *exp)
1151 value = exp->X_add_number;
1152 for (i = 0; i < sizeof (exp->X_add_number) / CHARS_PER_LITTLENUM; i++)
1154 generic_bignum[i] = value & LITTLENUM_MASK;
1155 value >>= LITTLENUM_NUMBER_OF_BITS;
1157 /* Add a sequence of sign bits if the top bit of X_add_number is not
1158 the sign of the original value. */
1159 if ((exp->X_add_number < 0) != !exp->X_unsigned)
1160 generic_bignum[i++] = exp->X_unsigned ? 0 : LITTLENUM_MASK;
1162 exp->X_add_number = i;
1165 /* For most MRI pseudo-ops, the line actually ends at the first
1166 nonquoted space. This function looks for that point, stuffs a null
1167 in, and sets *STOPCP to the character that used to be there, and
1168 returns the location.
1170 Until I hear otherwise, I am going to assume that this is only true
1171 for the m68k MRI assembler. */
1174 mri_comment_field (char *stopcp)
1180 know (flag_m68k_mri);
1182 for (s = input_line_pointer;
1183 ((!is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
1191 for (s = input_line_pointer;
1192 !is_end_of_line[(unsigned char) *s];
1202 /* Skip to the end of an MRI comment field. */
1205 mri_comment_end (char *stop, int stopc)
1209 input_line_pointer = stop;
1211 while (!is_end_of_line[(unsigned char) *input_line_pointer])
1212 ++input_line_pointer;
1216 s_abort (int ignore ATTRIBUTE_UNUSED)
1218 as_fatal (_(".abort detected. Abandoning ship."));
1221 /* Guts of .align directive. N is the power of two to which to align.
1222 FILL may be NULL, or it may point to the bytes of the fill pattern.
1223 LEN is the length of whatever FILL points to, if anything. MAX is
1224 the maximum number of characters to skip when doing the alignment,
1225 or 0 if there is no maximum. */
1228 do_align (int n, char *fill, int len, int max)
1230 if (now_seg == absolute_section)
1234 if (*fill++ != '\0')
1236 as_warn (_("ignoring fill value in absolute section"));
1243 #ifdef md_flush_pending_output
1244 md_flush_pending_output ();
1247 md_do_align (n, fill, len, max, just_record_alignment);
1250 /* Only make a frag if we HAVE to... */
1251 if (n != 0 && !need_pass_2)
1255 if (subseg_text_p (now_seg))
1256 frag_align_code (n, max);
1258 frag_align (n, 0, max);
1261 frag_align (n, *fill, max);
1263 frag_align_pattern (n, fill, len, max);
1267 just_record_alignment: ATTRIBUTE_UNUSED_LABEL
1270 record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
1273 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1274 (in bytes). A negative ARG is the negative of the length of the
1275 fill pattern. BYTES_P is non-zero if the alignment value should be
1276 interpreted as the byte boundary, rather than the power of 2. */
1278 #define ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1281 s_align (int arg, int bytes_p)
1283 unsigned int align_limit = ALIGN_LIMIT;
1292 stop = mri_comment_field (&stopc);
1294 if (is_end_of_line[(unsigned char) *input_line_pointer])
1299 align = arg; /* Default value from pseudo-op table. */
1303 align = get_absolute_expression ();
1309 /* Convert to a power of 2. */
1314 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1317 as_bad (_("alignment not a power of 2"));
1323 if (align > align_limit)
1325 align = align_limit;
1326 as_warn (_("alignment too large: %u assumed"), align);
1329 if (*input_line_pointer != ',')
1336 ++input_line_pointer;
1337 if (*input_line_pointer == ',')
1341 fill = get_absolute_expression ();
1346 if (*input_line_pointer != ',')
1350 ++input_line_pointer;
1351 max = get_absolute_expression ();
1358 as_warn (_("expected fill pattern missing"));
1359 do_align (align, (char *) NULL, 0, max);
1374 do_align (align, &fill_char, fill_len, max);
1380 if ((size_t) fill_len > sizeof ab)
1382 md_number_to_chars (ab, fill, fill_len);
1383 do_align (align, ab, fill_len, max);
1387 demand_empty_rest_of_line ();
1390 mri_comment_end (stop, stopc);
1393 /* Handle the .align pseudo-op on machines where ".align 4" means
1394 align to a 4 byte boundary. */
1397 s_align_bytes (int arg)
1402 /* Handle the .align pseudo-op on machines where ".align 4" means align
1403 to a 2**4 boundary. */
1406 s_align_ptwo (int arg)
1411 /* Switch in and out of alternate macro mode. */
1416 demand_empty_rest_of_line ();
1417 macro_set_alternate (on);
1421 s_comm_internal (int param,
1422 symbolS *(*comm_parse_extra) (int, symbolS *, addressT))
1428 symbolS *symbolP = NULL;
1434 stop = mri_comment_field (&stopc);
1436 name = input_line_pointer;
1437 c = get_symbol_end ();
1438 /* Just after name is now '\0'. */
1439 p = input_line_pointer;
1444 as_bad (_("expected symbol name"));
1445 ignore_rest_of_line ();
1451 /* Accept an optional comma after the name. The comma used to be
1452 required, but Irix 5 cc does not generate it for .lcomm. */
1453 if (*input_line_pointer == ',')
1454 input_line_pointer++;
1456 temp = get_absolute_expr (&exp);
1458 size &= ((offsetT) 2 << (stdoutput->arch_info->bits_per_address - 1)) - 1;
1459 if (exp.X_op == O_absent)
1461 as_bad (_("missing size expression"));
1462 ignore_rest_of_line ();
1465 else if (temp != size || !exp.X_unsigned)
1467 as_warn (_("size (%ld) out of range, ignored"), (long) temp);
1468 ignore_rest_of_line ();
1473 symbolP = symbol_find_or_make (name);
1474 if ((S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
1475 && !S_IS_COMMON (symbolP))
1477 if (!S_IS_VOLATILE (symbolP))
1480 as_bad (_("symbol `%s' is already defined"), name);
1482 ignore_rest_of_line ();
1485 symbolP = symbol_clone (symbolP, 1);
1486 S_SET_SEGMENT (symbolP, undefined_section);
1487 S_SET_VALUE (symbolP, 0);
1488 symbol_set_frag (symbolP, &zero_address_frag);
1489 S_CLEAR_VOLATILE (symbolP);
1492 size = S_GET_VALUE (symbolP);
1495 else if (size != temp)
1496 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1497 name, (long) size, (long) temp);
1500 if (comm_parse_extra != NULL)
1501 symbolP = (*comm_parse_extra) (param, symbolP, size);
1504 S_SET_VALUE (symbolP, (valueT) size);
1505 S_SET_EXTERNAL (symbolP);
1506 S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
1509 extern int flag_one;
1510 if (size == 0 || !flag_one)
1511 S_GET_OTHER (symbolP) = const_flag;
1516 demand_empty_rest_of_line ();
1519 mri_comment_end (stop, stopc);
1526 s_comm_internal (ignore, NULL);
1529 /* The MRI COMMON pseudo-op. We handle this by creating a common
1530 symbol with the appropriate name. We make s_space do the right
1531 thing by increasing the size. */
1534 s_mri_common (int small ATTRIBUTE_UNUSED)
1550 stop = mri_comment_field (&stopc);
1554 name = input_line_pointer;
1555 if (!ISDIGIT (*name))
1556 c = get_symbol_end ();
1561 ++input_line_pointer;
1563 while (ISDIGIT (*input_line_pointer));
1565 c = *input_line_pointer;
1566 *input_line_pointer = '\0';
1568 if (line_label != NULL)
1570 alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
1571 + (input_line_pointer - name)
1573 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1578 sym = symbol_find_or_make (name);
1579 *input_line_pointer = c;
1583 if (*input_line_pointer != ',')
1587 ++input_line_pointer;
1588 align = get_absolute_expression ();
1591 if (S_IS_DEFINED (sym) && !S_IS_COMMON (sym))
1593 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym));
1594 ignore_rest_of_line ();
1595 mri_comment_end (stop, stopc);
1599 S_SET_EXTERNAL (sym);
1600 S_SET_SEGMENT (sym, bfd_com_section_ptr);
1601 mri_common_symbol = sym;
1605 S_SET_ALIGN (sym, align);
1608 if (line_label != NULL)
1611 exp.X_op = O_symbol;
1612 exp.X_add_symbol = sym;
1613 exp.X_add_number = 0;
1614 symbol_set_value_expression (line_label, &exp);
1615 symbol_set_frag (line_label, &zero_address_frag);
1616 S_SET_SEGMENT (line_label, expr_section);
1619 /* FIXME: We just ignore the small argument, which distinguishes
1620 COMMON and COMMON.S. I don't know what we can do about it. */
1622 /* Ignore the type and hptype. */
1623 if (*input_line_pointer == ',')
1624 input_line_pointer += 2;
1625 if (*input_line_pointer == ',')
1626 input_line_pointer += 2;
1628 demand_empty_rest_of_line ();
1630 mri_comment_end (stop, stopc);
1634 s_data (int ignore ATTRIBUTE_UNUSED)
1639 temp = get_absolute_expression ();
1640 if (flag_readonly_data_in_text)
1642 section = text_section;
1646 section = data_section;
1648 subseg_set (section, (subsegT) temp);
1653 demand_empty_rest_of_line ();
1656 /* Handle the .appfile pseudo-op. This is automatically generated by
1657 do_scrub_chars when a preprocessor # line comment is seen with a
1658 file name. This default definition may be overridden by the object
1659 or CPU specific pseudo-ops. This function is also the default
1660 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1664 s_app_file_string (char *file, int appfile ATTRIBUTE_UNUSED)
1668 listing_source_file (file);
1670 register_dependency (file);
1672 obj_app_file (file, appfile);
1677 s_app_file (int appfile)
1682 /* Some assemblers tolerate immediately following '"'. */
1683 if ((s = demand_copy_string (&length)) != 0)
1686 = (!new_logical_line_flags (s, -1, 1) && appfile);
1688 /* In MRI mode, the preprocessor may have inserted an extraneous
1691 && *input_line_pointer == '\''
1692 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1693 ++input_line_pointer;
1695 demand_empty_rest_of_line ();
1697 s_app_file_string (s, appfile);
1701 /* Handle the .appline pseudo-op. This is automatically generated by
1702 do_scrub_chars when a preprocessor # line comment is seen. This
1703 default definition may be overridden by the object or CPU specific
1707 s_app_line (int appline)
1711 /* The given number is that of the next line. */
1712 l = get_absolute_expression () - 1;
1715 /* Some of the back ends can't deal with non-positive line numbers.
1716 Besides, it's silly. GCC however will generate a line number of
1717 zero when it is pre-processing builtins for assembler-with-cpp files:
1721 We do not want to barf on this, especially since such files are used
1722 in the GCC and GDB testsuites. So we check for negative line numbers
1723 rather than non-positive line numbers. */
1724 as_warn (_("line numbers must be positive; line number %d rejected"),
1734 file = demand_copy_string (&length);
1740 while ((this_flag = get_absolute_expression ()))
1743 /* From GCC's cpp documentation:
1744 1: start of a new file.
1745 2: returning to a file after having included
1747 3: following text comes from a system header file.
1748 4: following text should be treated as extern "C".
1750 4 is nonsensical for the assembler; 3, we don't
1751 care about, so we ignore it just in case a
1752 system header file is included while
1753 preprocessing assembly. So 1 and 2 are all we
1754 care about, and they are mutually incompatible.
1755 new_logical_line_flags() demands this. */
1758 if (flags && flags != (1 << this_flag))
1759 as_warn (_("incompatible flag %i in line directive"),
1762 flags |= 1 << this_flag;
1767 /* We ignore these. */
1771 as_warn (_("unsupported flag %i in line directive"),
1778 new_logical_line_flags (file, l, flags);
1781 listing_source_line (l);
1784 demand_empty_rest_of_line ();
1787 /* Handle the .end pseudo-op. Actually, the real work is done in
1788 read_a_source_file. */
1791 s_end (int ignore ATTRIBUTE_UNUSED)
1795 /* The MRI assembler permits the start symbol to follow .end,
1796 but we don't support that. */
1798 if (!is_end_of_line[(unsigned char) *input_line_pointer]
1799 && *input_line_pointer != '*'
1800 && *input_line_pointer != '!')
1801 as_warn (_("start address not supported"));
1805 /* Handle the .err pseudo-op. */
1808 s_err (int ignore ATTRIBUTE_UNUSED)
1810 as_bad (_(".err encountered"));
1811 demand_empty_rest_of_line ();
1814 /* Handle the .error and .warning pseudo-ops. */
1820 /* The purpose for the conditional assignment is not to
1821 internationalize the directive itself, but that we need a
1822 self-contained message, one that can be passed like the
1823 demand_copy_C_string return value, and with no assumption on the
1824 location of the name of the directive within the message. */
1826 = (err ? _(".error directive invoked in source file")
1827 : _(".warning directive invoked in source file"));
1829 if (!is_it_end_of_statement ())
1831 if (*input_line_pointer != '\"')
1833 as_bad (_("%s argument must be a string"),
1834 err ? ".error" : ".warning");
1835 ignore_rest_of_line ();
1839 msg = demand_copy_C_string (&len);
1847 as_warn ("%s", msg);
1848 demand_empty_rest_of_line ();
1851 /* Handle the MRI fail pseudo-op. */
1854 s_fail (int ignore ATTRIBUTE_UNUSED)
1861 stop = mri_comment_field (&stopc);
1863 temp = get_absolute_expression ();
1865 as_warn (_(".fail %ld encountered"), (long) temp);
1867 as_bad (_(".fail %ld encountered"), (long) temp);
1869 demand_empty_rest_of_line ();
1872 mri_comment_end (stop, stopc);
1876 s_fill (int ignore ATTRIBUTE_UNUSED)
1878 expressionS rep_exp;
1880 register long fill = 0;
1883 #ifdef md_flush_pending_output
1884 md_flush_pending_output ();
1887 get_known_segmented_expression (&rep_exp);
1888 if (*input_line_pointer == ',')
1890 input_line_pointer++;
1891 size = get_absolute_expression ();
1892 if (*input_line_pointer == ',')
1894 input_line_pointer++;
1895 fill = get_absolute_expression ();
1899 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1900 #define BSD_FILL_SIZE_CROCK_8 (8)
1901 if (size > BSD_FILL_SIZE_CROCK_8)
1903 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8);
1904 size = BSD_FILL_SIZE_CROCK_8;
1908 as_warn (_("size negative; .fill ignored"));
1911 else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
1913 if (rep_exp.X_add_number < 0)
1914 as_warn (_("repeat < 0; .fill ignored"));
1918 if (size && !need_pass_2)
1920 if (rep_exp.X_op == O_constant)
1922 p = frag_var (rs_fill, (int) size, (int) size,
1923 (relax_substateT) 0, (symbolS *) 0,
1924 (offsetT) rep_exp.X_add_number,
1929 /* We don't have a constant repeat count, so we can't use
1930 rs_fill. We can get the same results out of rs_space,
1931 but its argument is in bytes, so we must multiply the
1932 repeat count by size. */
1935 rep_sym = make_expr_symbol (&rep_exp);
1938 expressionS size_exp;
1939 size_exp.X_op = O_constant;
1940 size_exp.X_add_number = size;
1942 rep_exp.X_op = O_multiply;
1943 rep_exp.X_add_symbol = rep_sym;
1944 rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
1945 rep_exp.X_add_number = 0;
1946 rep_sym = make_expr_symbol (&rep_exp);
1949 p = frag_var (rs_space, (int) size, (int) size,
1950 (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
1953 memset (p, 0, (unsigned int) size);
1955 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1956 flavoured AS. The following bizarre behaviour is to be
1957 compatible with above. I guess they tried to take up to 8
1958 bytes from a 4-byte expression and they forgot to sign
1960 #define BSD_FILL_SIZE_CROCK_4 (4)
1961 md_number_to_chars (p, (valueT) fill,
1962 (size > BSD_FILL_SIZE_CROCK_4
1963 ? BSD_FILL_SIZE_CROCK_4
1965 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1966 but emits no error message because it seems a legal thing to do.
1967 It is a degenerate case of .fill but could be emitted by a
1970 demand_empty_rest_of_line ();
1974 s_globl (int ignore ATTRIBUTE_UNUSED)
1983 stop = mri_comment_field (&stopc);
1987 name = input_line_pointer;
1988 c = get_symbol_end ();
1989 symbolP = symbol_find_or_make (name);
1990 S_SET_EXTERNAL (symbolP);
1992 *input_line_pointer = c;
1994 c = *input_line_pointer;
1997 input_line_pointer++;
1999 if (is_end_of_line[(unsigned char) *input_line_pointer])
2005 demand_empty_rest_of_line ();
2008 mri_comment_end (stop, stopc);
2011 /* Handle the MRI IRP and IRPC pseudo-ops. */
2022 as_where (&file, &line);
2025 eol = find_end_of_line (input_line_pointer, 0);
2026 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2027 input_line_pointer = eol;
2031 err = expand_irp (irpc, 0, &s, &out, get_line_sb);
2033 as_bad_where (file, line, "%s", err);
2037 input_scrub_include_sb (&out, input_line_pointer, 1);
2039 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2042 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2043 the section to only be linked once. However, this is not supported
2044 by most object file formats. This takes an optional argument,
2045 which is what to do about duplicates. */
2048 s_linkonce (int ignore ATTRIBUTE_UNUSED)
2050 enum linkonce_type type;
2054 type = LINKONCE_DISCARD;
2056 if (!is_end_of_line[(unsigned char) *input_line_pointer])
2061 s = input_line_pointer;
2062 c = get_symbol_end ();
2063 if (strcasecmp (s, "discard") == 0)
2064 type = LINKONCE_DISCARD;
2065 else if (strcasecmp (s, "one_only") == 0)
2066 type = LINKONCE_ONE_ONLY;
2067 else if (strcasecmp (s, "same_size") == 0)
2068 type = LINKONCE_SAME_SIZE;
2069 else if (strcasecmp (s, "same_contents") == 0)
2070 type = LINKONCE_SAME_CONTENTS;
2072 as_warn (_("unrecognized .linkonce type `%s'"), s);
2074 *input_line_pointer = c;
2077 #ifdef obj_handle_link_once
2078 obj_handle_link_once (type);
2079 #else /* ! defined (obj_handle_link_once) */
2083 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
2084 as_warn (_(".linkonce is not supported for this object file format"));
2086 flags = bfd_get_section_flags (stdoutput, now_seg);
2087 flags |= SEC_LINK_ONCE;
2092 case LINKONCE_DISCARD:
2093 flags |= SEC_LINK_DUPLICATES_DISCARD;
2095 case LINKONCE_ONE_ONLY:
2096 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
2098 case LINKONCE_SAME_SIZE:
2099 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
2101 case LINKONCE_SAME_CONTENTS:
2102 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
2105 if (!bfd_set_section_flags (stdoutput, now_seg, flags))
2106 as_bad (_("bfd_set_section_flags: %s"),
2107 bfd_errmsg (bfd_get_error ()));
2109 #endif /* ! defined (obj_handle_link_once) */
2111 demand_empty_rest_of_line ();
2115 bss_alloc (symbolS *symbolP, addressT size, int align)
2118 segT current_seg = now_seg;
2119 subsegT current_subseg = now_subseg;
2120 segT bss_seg = bss_section;
2122 #if defined (TC_MIPS) || defined (TC_ALPHA)
2123 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
2124 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
2126 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2127 if (size <= bfd_get_gp_size (stdoutput))
2129 bss_seg = subseg_new (".sbss", 1);
2130 seg_info (bss_seg)->bss = 1;
2131 if (!bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
2132 as_warn (_("error setting flags for \".sbss\": %s"),
2133 bfd_errmsg (bfd_get_error ()));
2137 subseg_set (bss_seg, 1);
2141 record_alignment (bss_seg, align);
2142 frag_align (align, 0, 0);
2145 /* Detach from old frag. */
2146 if (S_GET_SEGMENT (symbolP) == bss_seg)
2147 symbol_get_frag (symbolP)->fr_symbol = NULL;
2149 symbol_set_frag (symbolP, frag_now);
2150 pfrag = frag_var (rs_org, 1, 1, 0, symbolP, size, NULL);
2154 S_SET_SIZE (symbolP, size);
2156 S_SET_SEGMENT (symbolP, bss_seg);
2159 /* The symbol may already have been created with a preceding
2160 ".globl" directive -- be careful not to step on storage class
2161 in that case. Otherwise, set it to static. */
2162 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
2163 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2164 #endif /* OBJ_COFF */
2166 subseg_set (current_seg, current_subseg);
2170 parse_align (int align_bytes)
2176 if (*input_line_pointer != ',')
2179 as_bad (_("expected alignment after size"));
2180 ignore_rest_of_line ();
2184 input_line_pointer++;
2187 align = get_absolute_expr (&exp);
2188 if (exp.X_op == O_absent)
2191 if (!exp.X_unsigned)
2193 as_warn (_("alignment negative; 0 assumed"));
2197 if (align_bytes && align != 0)
2199 /* convert to a power of 2 alignment */
2200 unsigned int alignp2 = 0;
2201 while ((align & 1) == 0)
2202 align >>= 1, ++alignp2;
2205 as_bad (_("alignment not a power of 2"));
2206 ignore_rest_of_line ();
2214 /* Called from s_comm_internal after symbol name and size have been
2215 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2216 1 if this was a ".bss" directive which has a 3rd argument
2217 (alignment as a power of 2), or 2 if this was a ".bss" directive
2218 with alignment in bytes. */
2221 s_lcomm_internal (int needs_align, symbolS *symbolP, addressT size)
2227 align = parse_align (needs_align - 1);
2228 if (align == (addressT) -1)
2232 /* Assume some objects may require alignment on some systems. */
2233 TC_IMPLICIT_LCOMM_ALIGNMENT (size, align);
2235 bss_alloc (symbolP, size, align);
2240 s_lcomm (int needs_align)
2242 s_comm_internal (needs_align, s_lcomm_internal);
2246 s_lcomm_bytes (int needs_align)
2248 s_comm_internal (needs_align * 2, s_lcomm_internal);
2252 s_lsym (int ignore ATTRIBUTE_UNUSED)
2254 register char *name;
2258 register symbolS *symbolP;
2260 /* We permit ANY defined expression: BSD4.2 demands constants. */
2261 name = input_line_pointer;
2262 c = get_symbol_end ();
2263 p = input_line_pointer;
2268 as_bad (_("expected symbol name"));
2269 ignore_rest_of_line ();
2275 if (*input_line_pointer != ',')
2278 as_bad (_("expected comma after \"%s\""), name);
2280 ignore_rest_of_line ();
2284 input_line_pointer++;
2285 expression_and_evaluate (&exp);
2287 if (exp.X_op != O_constant
2288 && exp.X_op != O_register)
2290 as_bad (_("bad expression"));
2291 ignore_rest_of_line ();
2296 symbolP = symbol_find_or_make (name);
2298 if (S_GET_SEGMENT (symbolP) == undefined_section)
2300 /* The name might be an undefined .global symbol; be sure to
2301 keep the "external" bit. */
2302 S_SET_SEGMENT (symbolP,
2303 (exp.X_op == O_constant
2306 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2310 as_bad (_("symbol `%s' is already defined"), name);
2314 demand_empty_rest_of_line ();
2317 /* Read a line into an sb. Returns the character that ended the line
2318 or zero if there are no more lines. */
2321 get_line_sb (sb *line)
2325 if (input_line_pointer[-1] == '\n')
2326 bump_line_counters ();
2328 if (input_line_pointer >= buffer_limit)
2330 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2331 if (buffer_limit == 0)
2335 eol = find_end_of_line (input_line_pointer, flag_m68k_mri);
2336 sb_add_buffer (line, input_line_pointer, eol - input_line_pointer);
2337 input_line_pointer = eol;
2339 /* Don't skip multiple end-of-line characters, because that breaks support
2340 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2341 characters but isn't. Instead just skip one end of line character and
2342 return the character skipped so that the caller can re-insert it if
2344 return *input_line_pointer++;
2347 /* Define a macro. This is an interface to macro.c. */
2350 s_macro (int ignore ATTRIBUTE_UNUSED)
2358 as_where (&file, &line);
2361 eol = find_end_of_line (input_line_pointer, 0);
2362 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2363 input_line_pointer = eol;
2365 if (line_label != NULL)
2370 sb_add_string (&label, S_GET_NAME (line_label));
2371 err = define_macro (0, &s, &label, get_line_sb, file, line, &name);
2375 err = define_macro (0, &s, NULL, get_line_sb, file, line, &name);
2377 as_bad_where (file, line, err, name);
2380 if (line_label != NULL)
2382 S_SET_SEGMENT (line_label, absolute_section);
2383 S_SET_VALUE (line_label, 0);
2384 symbol_set_frag (line_label, &zero_address_frag);
2387 if (((NO_PSEUDO_DOT || flag_m68k_mri)
2388 && hash_find (po_hash, name) != NULL)
2391 && hash_find (po_hash, name + 1) != NULL))
2392 as_warn_where (file,
2394 _("attempt to redefine pseudo-op `%s' ignored"),
2401 /* Handle the .mexit pseudo-op, which immediately exits a macro
2405 s_mexit (int ignore ATTRIBUTE_UNUSED)
2407 cond_exit_macro (macro_nest);
2408 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2411 /* Switch in and out of MRI mode. */
2414 s_mri (int ignore ATTRIBUTE_UNUSED)
2418 on = get_absolute_expression ();
2419 old_flag = flag_mri;
2437 /* Operator precedence changes in m68k MRI mode, so we need to
2438 update the operator rankings. */
2439 expr_set_precedence ();
2441 #ifdef MRI_MODE_CHANGE
2443 MRI_MODE_CHANGE (on);
2446 demand_empty_rest_of_line ();
2449 /* Handle changing the location counter. */
2452 do_org (segT segment, expressionS *exp, int fill)
2454 if (segment != now_seg && segment != absolute_section)
2455 as_bad (_("invalid segment \"%s\""), segment_name (segment));
2457 if (now_seg == absolute_section)
2460 as_warn (_("ignoring fill value in absolute section"));
2461 if (exp->X_op != O_constant)
2463 as_bad (_("only constant offsets supported in absolute section"));
2464 exp->X_add_number = 0;
2466 abs_section_offset = exp->X_add_number;
2471 symbolS *sym = exp->X_add_symbol;
2472 offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
2474 if (exp->X_op != O_constant && exp->X_op != O_symbol)
2476 /* Handle complex expressions. */
2477 sym = make_expr_symbol (exp);
2481 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
2487 s_org (int ignore ATTRIBUTE_UNUSED)
2489 register segT segment;
2491 register long temp_fill;
2493 #ifdef md_flush_pending_output
2494 md_flush_pending_output ();
2497 /* The m68k MRI assembler has a different meaning for .org. It
2498 means to create an absolute section at a given address. We can't
2499 support that--use a linker script instead. */
2502 as_bad (_("MRI style ORG pseudo-op not supported"));
2503 ignore_rest_of_line ();
2507 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2508 thing as a sub-segment-relative origin. Any absolute origin is
2509 given a warning, then assumed to be segment-relative. Any
2510 segmented origin expression ("foo+42") had better be in the right
2511 segment or the .org is ignored.
2513 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2514 we never know sub-segment sizes when we are reading code. BSD
2515 will crash trying to emit negative numbers of filler bytes in
2516 certain .orgs. We don't crash, but see as-write for that code.
2518 Don't make frag if need_pass_2==1. */
2519 segment = get_known_segmented_expression (&exp);
2520 if (*input_line_pointer == ',')
2522 input_line_pointer++;
2523 temp_fill = get_absolute_expression ();
2529 do_org (segment, &exp, temp_fill);
2531 demand_empty_rest_of_line ();
2534 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2535 called by the obj-format routine which handles section changing
2536 when in MRI mode. It will create a new section, and return it. It
2537 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2538 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2541 s_mri_sect (char *type ATTRIBUTE_UNUSED)
2551 name = input_line_pointer;
2552 if (!ISDIGIT (*name))
2553 c = get_symbol_end ();
2558 ++input_line_pointer;
2560 while (ISDIGIT (*input_line_pointer));
2562 c = *input_line_pointer;
2563 *input_line_pointer = '\0';
2566 name = xstrdup (name);
2568 *input_line_pointer = c;
2570 seg = subseg_new (name, 0);
2572 if (*input_line_pointer == ',')
2576 ++input_line_pointer;
2577 align = get_absolute_expression ();
2578 record_alignment (seg, align);
2582 if (*input_line_pointer == ',')
2584 c = *++input_line_pointer;
2586 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2589 as_bad (_("unrecognized section type"));
2590 ++input_line_pointer;
2595 flags = SEC_NO_FLAGS;
2597 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2598 else if (*type == 'D' || *type == 'M')
2599 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2600 else if (*type == 'R')
2601 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2602 if (flags != SEC_NO_FLAGS)
2604 if (!bfd_set_section_flags (stdoutput, seg, flags))
2605 as_warn (_("error setting flags for \"%s\": %s"),
2606 bfd_section_name (stdoutput, seg),
2607 bfd_errmsg (bfd_get_error ()));
2612 /* Ignore the HP type. */
2613 if (*input_line_pointer == ',')
2614 input_line_pointer += 2;
2616 demand_empty_rest_of_line ();
2618 #else /* ! TC_M68K */
2627 name = input_line_pointer;
2628 c = get_symbol_end ();
2630 name = xstrdup (name);
2632 *input_line_pointer = c;
2634 seg = subseg_new (name, 0);
2636 if (*input_line_pointer != ',')
2642 ++input_line_pointer;
2644 sectype = input_line_pointer;
2645 c = get_symbol_end ();
2646 if (*sectype == '\0')
2648 else if (strcasecmp (sectype, "text") == 0)
2650 else if (strcasecmp (sectype, "data") == 0)
2652 else if (strcasecmp (sectype, "romdata") == 0)
2655 as_warn (_("unrecognized section type `%s'"), sectype);
2656 *input_line_pointer = c;
2659 if (*input_line_pointer == ',')
2663 ++input_line_pointer;
2665 seccmd = input_line_pointer;
2666 c = get_symbol_end ();
2667 if (strcasecmp (seccmd, "absolute") == 0)
2669 as_bad (_("absolute sections are not supported"));
2670 *input_line_pointer = c;
2671 ignore_rest_of_line ();
2674 else if (strcasecmp (seccmd, "align") == 0)
2678 *input_line_pointer = c;
2679 align = get_absolute_expression ();
2680 record_alignment (seg, align);
2684 as_warn (_("unrecognized section command `%s'"), seccmd);
2685 *input_line_pointer = c;
2689 demand_empty_rest_of_line ();
2691 #else /* ! TC_I960 */
2692 /* The MRI assembler seems to use different forms of .sect for
2693 different targets. */
2694 as_bad ("MRI mode not supported for this target");
2695 ignore_rest_of_line ();
2696 #endif /* ! TC_I960 */
2697 #endif /* ! TC_M68K */
2700 /* Handle the .print pseudo-op. */
2703 s_print (int ignore ATTRIBUTE_UNUSED)
2708 s = demand_copy_C_string (&len);
2711 demand_empty_rest_of_line ();
2714 /* Handle the .purgem pseudo-op. */
2717 s_purgem (int ignore ATTRIBUTE_UNUSED)
2719 if (is_it_end_of_statement ())
2721 demand_empty_rest_of_line ();
2731 name = input_line_pointer;
2732 c = get_symbol_end ();
2733 delete_macro (name);
2734 *input_line_pointer = c;
2737 while (*input_line_pointer++ == ',');
2739 --input_line_pointer;
2740 demand_empty_rest_of_line ();
2743 /* Handle the .endm/.endr pseudo-ops. */
2746 s_bad_end (int endr)
2748 as_warn (_(".end%c encountered without preceeding %s"),
2750 endr ? ".rept, .irp, or .irpc" : ".macro");
2751 demand_empty_rest_of_line ();
2754 /* Handle the .rept pseudo-op. */
2757 s_rept (int ignore ATTRIBUTE_UNUSED)
2761 count = get_absolute_expression ();
2763 do_repeat (count, "REPT", "ENDR");
2766 /* This function provides a generic repeat block implementation. It allows
2767 different directives to be used as the start/end keys. */
2770 do_repeat (int count, const char *start, const char *end)
2776 if (!buffer_and_nest (start, end, &one, get_line_sb))
2778 as_bad (_("%s without %s"), start, end);
2784 sb_add_sb (&many, &one);
2788 input_scrub_include_sb (&many, input_line_pointer, 1);
2790 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2793 /* Skip to end of current repeat loop; EXTRA indicates how many additional
2794 input buffers to skip. Assumes that conditionals preceding the loop end
2795 are properly nested.
2797 This function makes it easier to implement a premature "break" out of the
2798 loop. The EXTRA arg accounts for other buffers we might have inserted,
2799 such as line substitutions. */
2802 end_repeat (int extra)
2804 cond_exit_macro (macro_nest);
2805 while (extra-- >= 0)
2806 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2810 assign_symbol (char *name, int mode)
2814 if (name[0] == '.' && name[1] == '\0')
2816 /* Turn '. = mumble' into a .org mumble. */
2820 segment = get_known_segmented_expression (&exp);
2823 do_org (segment, &exp, 0);
2828 if ((symbolP = symbol_find (name)) == NULL
2829 && (symbolP = md_undefined_symbol (name)) == NULL)
2831 symbolP = symbol_find_or_make (name);
2833 /* When doing symbol listings, play games with dummy fragments living
2834 outside the normal fragment chain to record the file and line info
2836 if (listing & LISTING_SYMBOLS)
2838 extern struct list_info_struct *listing_tail;
2839 fragS *dummy_frag = (fragS *) xcalloc (1, sizeof (fragS));
2840 dummy_frag->line = listing_tail;
2841 dummy_frag->fr_symbol = symbolP;
2842 symbol_set_frag (symbolP, dummy_frag);
2846 /* "set" symbols are local unless otherwise specified. */
2847 SF_SET_LOCAL (symbolP);
2851 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
2853 /* Permit register names to be redefined. */
2854 if ((mode != 0 || !S_IS_VOLATILE (symbolP))
2855 && S_GET_SEGMENT (symbolP) != reg_section)
2857 as_bad (_("symbol `%s' is already defined"), name);
2858 symbolP = symbol_clone (symbolP, 0);
2860 /* If the symbol is volatile, copy the symbol and replace the
2861 original with the copy, so that previous uses of the symbol will
2862 retain the value of the symbol at the point of use. */
2863 else if (S_IS_VOLATILE (symbolP))
2864 symbolP = symbol_clone (symbolP, 1);
2868 S_SET_VOLATILE (symbolP);
2870 S_SET_FORWARD_REF (symbolP);
2872 pseudo_set (symbolP);
2875 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
2876 then this is .equiv, and it is an error if the symbol is already
2877 defined. If EQUIV is -1, the symbol additionally is a forward
2887 /* Especial apologies for the random logic:
2888 this just grew, and could be parsed much more simply!
2890 name = input_line_pointer;
2891 delim = get_symbol_end ();
2892 end_name = input_line_pointer;
2895 if (name == end_name)
2897 as_bad (_("expected symbol name"));
2898 ignore_rest_of_line ();
2904 if (*input_line_pointer != ',')
2907 as_bad (_("expected comma after \"%s\""), name);
2909 ignore_rest_of_line ();
2913 input_line_pointer++;
2916 assign_symbol (name, equiv);
2919 demand_empty_rest_of_line ();
2932 #ifdef md_flush_pending_output
2933 md_flush_pending_output ();
2937 stop = mri_comment_field (&stopc);
2939 /* In m68k MRI mode, we need to align to a word boundary, unless
2941 if (flag_m68k_mri && mult > 1)
2943 if (now_seg == absolute_section)
2945 abs_section_offset += abs_section_offset & 1;
2946 if (line_label != NULL)
2947 S_SET_VALUE (line_label, abs_section_offset);
2949 else if (mri_common_symbol != NULL)
2953 val = S_GET_VALUE (mri_common_symbol);
2956 S_SET_VALUE (mri_common_symbol, val + 1);
2957 if (line_label != NULL)
2959 expressionS *symexp;
2961 symexp = symbol_get_value_expression (line_label);
2962 know (symexp->X_op == O_symbol);
2963 know (symexp->X_add_symbol == mri_common_symbol);
2964 symexp->X_add_number += 1;
2970 do_align (1, (char *) NULL, 0, 0);
2971 if (line_label != NULL)
2973 symbol_set_frag (line_label, frag_now);
2974 S_SET_VALUE (line_label, frag_now_fix ());
2984 if (*input_line_pointer == ',')
2986 ++input_line_pointer;
2991 val.X_op = O_constant;
2992 val.X_add_number = 0;
2995 if (val.X_op != O_constant
2996 || val.X_add_number < - 0x80
2997 || val.X_add_number > 0xff
2998 || (mult != 0 && mult != 1 && val.X_add_number != 0))
3000 resolve_expression (&exp);
3001 if (exp.X_op != O_constant)
3002 as_bad (_("unsupported variable size or fill value"));
3009 bytes = mult * exp.X_add_number;
3010 for (i = 0; i < exp.X_add_number; i++)
3011 emit_expr (&val, mult);
3016 if (now_seg == absolute_section || mri_common_symbol != NULL)
3017 resolve_expression (&exp);
3019 if (exp.X_op == O_constant)
3023 repeat = exp.X_add_number;
3030 as_warn (_(".space repeat count is zero, ignored"));
3031 else if (repeat < 0)
3032 as_warn (_(".space repeat count is negative, ignored"));
3036 /* If we are in the absolute section, just bump the offset. */
3037 if (now_seg == absolute_section)
3039 abs_section_offset += repeat;
3043 /* If we are secretly in an MRI common section, then
3044 creating space just increases the size of the common
3046 if (mri_common_symbol != NULL)
3048 S_SET_VALUE (mri_common_symbol,
3049 S_GET_VALUE (mri_common_symbol) + repeat);
3054 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
3055 (offsetT) repeat, (char *) 0);
3059 if (now_seg == absolute_section)
3061 as_bad (_("space allocation too complex in absolute section"));
3062 subseg_set (text_section, 0);
3065 if (mri_common_symbol != NULL)
3067 as_bad (_("space allocation too complex in common section"));
3068 mri_common_symbol = NULL;
3072 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
3073 make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
3077 *p = val.X_add_number;
3082 /* In MRI mode, after an odd number of bytes, we must align to an
3083 even word boundary, unless the next instruction is a dc.b, ds.b
3085 if (flag_mri && (bytes & 1) != 0)
3086 mri_pending_align = 1;
3088 demand_empty_rest_of_line ();
3091 mri_comment_end (stop, stopc);
3094 /* This is like s_space, but the value is a floating point number with
3095 the given precision. This is for the MRI dcb.s pseudo-op and
3099 s_float_space (int float_type)
3103 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3108 stop = mri_comment_field (&stopc);
3110 count = get_absolute_expression ();
3113 if (*input_line_pointer != ',')
3115 as_bad (_("missing value"));
3116 ignore_rest_of_line ();
3118 mri_comment_end (stop, stopc);
3122 ++input_line_pointer;
3126 /* Skip any 0{letter} that may be present. Don't even check if the
3127 * letter is legal. */
3128 if (input_line_pointer[0] == '0'
3129 && ISALPHA (input_line_pointer[1]))
3130 input_line_pointer += 2;
3132 /* Accept :xxxx, where the x's are hex digits, for a floating point
3133 with the exact digits specified. */
3134 if (input_line_pointer[0] == ':')
3136 flen = hex_float (float_type, temp);
3139 ignore_rest_of_line ();
3141 mri_comment_end (stop, stopc);
3149 err = md_atof (float_type, temp, &flen);
3150 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
3154 as_bad (_("bad floating literal: %s"), err);
3155 ignore_rest_of_line ();
3157 mri_comment_end (stop, stopc);
3162 while (--count >= 0)
3166 p = frag_more (flen);
3167 memcpy (p, temp, (unsigned int) flen);
3170 demand_empty_rest_of_line ();
3173 mri_comment_end (stop, stopc);
3176 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3179 s_struct (int ignore ATTRIBUTE_UNUSED)
3185 stop = mri_comment_field (&stopc);
3186 abs_section_offset = get_absolute_expression ();
3187 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3188 /* The ELF backend needs to know that we are changing sections, so
3189 that .previous works correctly. */
3191 obj_elf_section_change_hook ();
3193 subseg_set (absolute_section, 0);
3194 demand_empty_rest_of_line ();
3196 mri_comment_end (stop, stopc);
3200 s_text (int ignore ATTRIBUTE_UNUSED)
3204 temp = get_absolute_expression ();
3205 subseg_set (text_section, (subsegT) temp);
3206 demand_empty_rest_of_line ();
3208 const_flag &= ~IN_DEFAULT_SECTION;
3212 /* .weakref x, y sets x as an alias to y that, as long as y is not
3213 referenced directly, will cause y to become a weak symbol. */
3215 s_weakref (int ignore ATTRIBUTE_UNUSED)
3224 name = input_line_pointer;
3225 delim = get_symbol_end ();
3226 end_name = input_line_pointer;
3228 if (name == end_name)
3230 as_bad (_("expected symbol name"));
3232 ignore_rest_of_line ();
3236 symbolP = symbol_find_or_make (name);
3238 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
3240 if (!S_IS_VOLATILE (symbolP))
3242 as_bad (_("symbol `%s' is already defined"), name);
3244 ignore_rest_of_line ();
3247 symbolP = symbol_clone (symbolP, 1);
3248 S_CLEAR_VOLATILE (symbolP);
3255 if (*input_line_pointer != ',')
3258 as_bad (_("expected comma after \"%s\""), name);
3260 ignore_rest_of_line ();
3264 input_line_pointer++;
3268 name = input_line_pointer;
3269 delim = get_symbol_end ();
3270 end_name = input_line_pointer;
3272 if (name == end_name)
3274 as_bad (_("expected symbol name"));
3275 ignore_rest_of_line ();
3279 if ((symbolP2 = symbol_find_noref (name, 1)) == NULL
3280 && (symbolP2 = md_undefined_symbol (name)) == NULL)
3282 symbolP2 = symbol_find_or_make (name);
3283 S_SET_WEAKREFD (symbolP2);
3287 symbolS *symp = symbolP2;
3289 while (S_IS_WEAKREFR (symp) && symp != symbolP)
3291 expressionS *expP = symbol_get_value_expression (symp);
3293 assert (expP->X_op == O_symbol
3294 && expP->X_add_number == 0);
3295 symp = expP->X_add_symbol;
3297 if (symp == symbolP)
3301 loop = concat (S_GET_NAME (symbolP),
3302 " => ", S_GET_NAME (symbolP2), NULL);
3305 while (symp != symbolP)
3307 char *old_loop = loop;
3308 symp = symbol_get_value_expression (symp)->X_add_symbol;
3309 loop = concat (loop, " => ", S_GET_NAME (symp), NULL);
3313 as_bad (_("%s: would close weakref loop: %s"),
3314 S_GET_NAME (symbolP), loop);
3319 ignore_rest_of_line ();
3323 /* Short-circuiting instead of just checking here might speed
3324 things up a tiny little bit, but loop error messages would
3325 miss intermediate links. */
3326 /* symbolP2 = symp; */
3331 memset (&exp, 0, sizeof (exp));
3332 exp.X_op = O_symbol;
3333 exp.X_add_symbol = symbolP2;
3335 S_SET_SEGMENT (symbolP, undefined_section);
3336 symbol_set_value_expression (symbolP, &exp);
3337 symbol_set_frag (symbolP, &zero_address_frag);
3338 S_SET_WEAKREFR (symbolP);
3340 demand_empty_rest_of_line ();
3344 /* Verify that we are at the end of a line. If not, issue an error and
3348 demand_empty_rest_of_line (void)
3351 if (is_end_of_line[(unsigned char) *input_line_pointer])
3352 input_line_pointer++;
3355 if (ISPRINT (*input_line_pointer))
3356 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3357 *input_line_pointer);
3359 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3360 *input_line_pointer);
3361 ignore_rest_of_line ();
3364 /* Return pointing just after end-of-line. */
3365 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3368 /* Silently advance to the end of line. Use this after already having
3369 issued an error about something bad. */
3372 ignore_rest_of_line (void)
3374 while (input_line_pointer < buffer_limit
3375 && !is_end_of_line[(unsigned char) *input_line_pointer])
3376 input_line_pointer++;
3378 input_line_pointer++;
3380 /* Return pointing just after end-of-line. */
3381 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3384 /* Sets frag for given symbol to zero_address_frag, except when the
3385 symbol frag is already set to a dummy listing frag. */
3388 set_zero_frag (symbolS *symbolP)
3390 if (symbol_get_frag (symbolP)->fr_type != rs_dummy)
3391 symbol_set_frag (symbolP, &zero_address_frag);
3394 /* In: Pointer to a symbol.
3395 Input_line_pointer->expression.
3397 Out: Input_line_pointer->just after any whitespace after expression.
3398 Tried to set symbol to value of expression.
3399 Will change symbols type, value, and frag; */
3402 pseudo_set (symbolS *symbolP)
3407 know (symbolP); /* NULL pointer is logic error. */
3409 if (!S_IS_FORWARD_REF (symbolP))
3410 (void) expression (&exp);
3412 (void) deferred_expression (&exp);
3414 if (exp.X_op == O_illegal)
3415 as_bad (_("illegal expression"));
3416 else if (exp.X_op == O_absent)
3417 as_bad (_("missing expression"));
3418 else if (exp.X_op == O_big)
3420 if (exp.X_add_number > 0)
3421 as_bad (_("bignum invalid"));
3423 as_bad (_("floating point number invalid"));
3425 else if (exp.X_op == O_subtract
3426 && !S_IS_FORWARD_REF (symbolP)
3427 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
3428 && (symbol_get_frag (exp.X_add_symbol)
3429 == symbol_get_frag (exp.X_op_symbol)))
3431 exp.X_op = O_constant;
3432 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
3433 - S_GET_VALUE (exp.X_op_symbol));
3436 if (symbol_section_p (symbolP))
3438 as_bad ("attempt to set value of section symbol");
3447 exp.X_add_number = 0;
3450 S_SET_SEGMENT (symbolP, absolute_section);
3451 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3452 set_zero_frag (symbolP);
3456 S_SET_SEGMENT (symbolP, reg_section);
3457 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3458 set_zero_frag (symbolP);
3462 seg = S_GET_SEGMENT (exp.X_add_symbol);
3463 /* For x=undef+const, create an expression symbol.
3464 For x=x+const, just update x except when x is an undefined symbol
3465 For x=defined+const, evaluate x. */
3466 if (symbolP == exp.X_add_symbol
3467 && (seg != undefined_section
3468 || !symbol_constant_p (symbolP)))
3470 *symbol_X_add_number (symbolP) += exp.X_add_number;
3473 else if (!S_IS_FORWARD_REF (symbolP) && seg != undefined_section)
3475 symbolS *s = exp.X_add_symbol;
3477 if (S_IS_COMMON (s))
3478 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3479 S_GET_NAME (symbolP), S_GET_NAME (s));
3481 S_SET_SEGMENT (symbolP, seg);
3482 S_SET_VALUE (symbolP, exp.X_add_number + S_GET_VALUE (s));
3483 symbol_set_frag (symbolP, symbol_get_frag (s));
3484 copy_symbol_attributes (symbolP, s);
3487 S_SET_SEGMENT (symbolP, undefined_section);
3488 symbol_set_value_expression (symbolP, &exp);
3489 set_zero_frag (symbolP);
3493 /* The value is some complex expression. */
3494 S_SET_SEGMENT (symbolP, expr_section);
3495 symbol_set_value_expression (symbolP, &exp);
3496 set_zero_frag (symbolP);
3503 CONStruct more frag of .bytes, or .words etc.
3504 Should need_pass_2 be 1 then emit no frag(s).
3505 This understands EXPRESSIONS.
3509 This has a split personality. We use expression() to read the
3510 value. We can detect if the value won't fit in a byte or word.
3511 But we can't detect if expression() discarded significant digits
3512 in the case of a long. Not worth the crocks required to fix it. */
3514 /* Select a parser for cons expressions. */
3516 /* Some targets need to parse the expression in various fancy ways.
3517 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3518 (for example, the HPPA does this). Otherwise, you can define
3519 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3520 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3521 are defined, which is the normal case, then only simple expressions
3526 parse_mri_cons (expressionS *exp, unsigned int nbytes);
3529 #ifndef TC_PARSE_CONS_EXPRESSION
3530 #ifdef BITFIELD_CONS_EXPRESSIONS
3531 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3533 parse_bitfield_cons (expressionS *exp, unsigned int nbytes);
3535 #ifdef REPEAT_CONS_EXPRESSIONS
3536 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3538 parse_repeat_cons (expressionS *exp, unsigned int nbytes);
3541 /* If we haven't gotten one yet, just call expression. */
3542 #ifndef TC_PARSE_CONS_EXPRESSION
3543 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3548 do_parse_cons_expression (expressionS *exp,
3549 int nbytes ATTRIBUTE_UNUSED)
3551 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3555 /* Worker to do .byte etc statements.
3556 Clobbers input_line_pointer and checks end-of-line. */
3559 cons_worker (register int nbytes, /* 1=.byte, 2=.word, 4=.long. */
3567 #ifdef md_flush_pending_output
3568 md_flush_pending_output ();
3572 stop = mri_comment_field (&stopc);
3574 if (is_it_end_of_statement ())
3576 demand_empty_rest_of_line ();
3578 mri_comment_end (stop, stopc);
3582 #ifdef TC_ADDRESS_BYTES
3584 nbytes = TC_ADDRESS_BYTES ();
3587 #ifdef md_cons_align
3588 md_cons_align (nbytes);
3596 parse_mri_cons (&exp, (unsigned int) nbytes);
3599 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3603 if (exp.X_op == O_symbol)
3604 exp.X_op = O_symbol_rva;
3606 as_fatal (_("rva without symbol"));
3608 emit_expr (&exp, (unsigned int) nbytes);
3611 while (*input_line_pointer++ == ',');
3613 /* In MRI mode, after an odd number of bytes, we must align to an
3614 even word boundary, unless the next instruction is a dc.b, ds.b
3616 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3617 mri_pending_align = 1;
3619 input_line_pointer--; /* Put terminator back into stream. */
3621 demand_empty_rest_of_line ();
3624 mri_comment_end (stop, stopc);
3630 cons_worker (size, 0);
3636 cons_worker (size, 1);
3639 /* Put the contents of expression EXP into the object file using
3640 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3643 emit_expr (expressionS *exp, unsigned int nbytes)
3647 valueT extra_digit = 0;
3649 /* Don't do anything if we are going to make another pass. */
3653 dot_value = frag_now_fix ();
3657 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3658 appear as a four byte positive constant in the .line section,
3659 followed by a 2 byte 0xffff. Look for that case here. */
3661 static int dwarf_line = -1;
3663 if (strcmp (segment_name (now_seg), ".line") != 0)
3665 else if (dwarf_line >= 0
3667 && exp->X_op == O_constant
3668 && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
3669 listing_source_line ((unsigned int) dwarf_line);
3670 else if (nbytes == 4
3671 && exp->X_op == O_constant
3672 && exp->X_add_number >= 0)
3673 dwarf_line = exp->X_add_number;
3678 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3679 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3680 AT_sibling (0x12) followed by a four byte address of the sibling
3681 followed by a 2 byte AT_name (0x38) followed by the name of the
3682 file. We look for that case here. */
3684 static int dwarf_file = 0;
3686 if (strcmp (segment_name (now_seg), ".debug") != 0)
3688 else if (dwarf_file == 0
3690 && exp->X_op == O_constant
3691 && exp->X_add_number == 0x11)
3693 else if (dwarf_file == 1
3695 && exp->X_op == O_constant
3696 && exp->X_add_number == 0x12)
3698 else if (dwarf_file == 2
3701 else if (dwarf_file == 3
3703 && exp->X_op == O_constant
3704 && exp->X_add_number == 0x38)
3709 /* The variable dwarf_file_string tells stringer that the string
3710 may be the name of the source file. */
3711 if (dwarf_file == 4)
3712 dwarf_file_string = 1;
3714 dwarf_file_string = 0;
3719 if (check_eh_frame (exp, &nbytes))
3724 /* Allow `.word 0' in the absolute section. */
3725 if (now_seg == absolute_section)
3727 if (op != O_constant || exp->X_add_number != 0)
3728 as_bad (_("attempt to store value in absolute section"));
3729 abs_section_offset += nbytes;
3733 /* Handle a negative bignum. */
3735 && exp->X_add_number == 0
3736 && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
3737 && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
3740 unsigned long carry;
3742 exp = symbol_get_value_expression (exp->X_add_symbol);
3744 /* Negate the bignum: one's complement each digit and add 1. */
3746 for (i = 0; i < exp->X_add_number; i++)
3750 next = (((~(generic_bignum[i] & LITTLENUM_MASK))
3753 generic_bignum[i] = next & LITTLENUM_MASK;
3754 carry = next >> LITTLENUM_NUMBER_OF_BITS;
3757 /* We can ignore any carry out, because it will be handled by
3758 extra_digit if it is needed. */
3760 extra_digit = (valueT) -1;
3764 if (op == O_absent || op == O_illegal)
3766 as_warn (_("zero assumed for missing expression"));
3767 exp->X_add_number = 0;
3770 else if (op == O_big && exp->X_add_number <= 0)
3772 as_bad (_("floating point number invalid"));
3773 exp->X_add_number = 0;
3776 else if (op == O_register)
3778 as_warn (_("register value used as expression"));
3782 p = frag_more ((int) nbytes);
3784 #ifndef WORKING_DOT_WORD
3785 /* If we have the difference of two symbols in a word, save it on
3786 the broken_words list. See the code in write.c. */
3787 if (op == O_subtract && nbytes == 2)
3789 struct broken_word *x;
3791 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
3792 x->next_broken_word = broken_words;
3795 x->subseg = now_subseg;
3797 x->word_goes_here = p;
3799 x->add = exp->X_add_symbol;
3800 x->sub = exp->X_op_symbol;
3801 x->addnum = exp->X_add_number;
3809 /* If we have an integer, but the number of bytes is too large to
3810 pass to md_number_to_chars, handle it as a bignum. */
3811 if (op == O_constant && nbytes > sizeof (valueT))
3813 extra_digit = exp->X_unsigned ? 0 : -1;
3814 convert_to_bignum (exp);
3818 if (op == O_constant)
3820 register valueT get;
3821 register valueT use;
3822 register valueT mask;
3824 register valueT unmask;
3826 /* JF << of >= number of bits in the object is undefined. In
3827 particular SPARC (Sun 4) has problems. */
3828 if (nbytes >= sizeof (valueT))
3831 if (nbytes > sizeof (valueT))
3834 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3838 /* Don't store these bits. */
3839 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
3840 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3843 unmask = ~mask; /* Do store these bits. */
3846 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3847 mask = ~(unmask >> 1); /* Includes sign bit now. */
3850 get = exp->X_add_number;
3852 if ((get & mask) != 0
3853 && ((get & mask) != mask
3854 || (get & hibit) == 0))
3855 { /* Leading bits contain both 0s & 1s. */
3856 as_warn (_("value 0x%lx truncated to 0x%lx"),
3857 (unsigned long) get, (unsigned long) use);
3859 /* Put bytes in right order. */
3860 md_number_to_chars (p, use, (int) nbytes);
3862 else if (op == O_big)
3865 LITTLENUM_TYPE *nums;
3867 know (nbytes % CHARS_PER_LITTLENUM == 0);
3869 size = exp->X_add_number * CHARS_PER_LITTLENUM;
3872 as_warn (_("bignum truncated to %d bytes"), nbytes);
3876 if (target_big_endian)
3878 while (nbytes > size)
3880 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3881 nbytes -= CHARS_PER_LITTLENUM;
3882 p += CHARS_PER_LITTLENUM;
3885 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
3886 while (size >= CHARS_PER_LITTLENUM)
3889 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3890 size -= CHARS_PER_LITTLENUM;
3891 p += CHARS_PER_LITTLENUM;
3896 nums = generic_bignum;
3897 while (size >= CHARS_PER_LITTLENUM)
3899 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3901 size -= CHARS_PER_LITTLENUM;
3902 p += CHARS_PER_LITTLENUM;
3903 nbytes -= CHARS_PER_LITTLENUM;
3906 while (nbytes >= CHARS_PER_LITTLENUM)
3908 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3909 nbytes -= CHARS_PER_LITTLENUM;
3910 p += CHARS_PER_LITTLENUM;
3916 memset (p, 0, nbytes);
3918 /* Now we need to generate a fixS to record the symbol value. */
3920 #ifdef TC_CONS_FIX_NEW
3921 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
3924 bfd_reloc_code_real_type r;
3941 as_bad (_("unsupported BFD relocation size %u"), nbytes);
3945 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp,
3952 #ifdef BITFIELD_CONS_EXPRESSIONS
3954 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3955 w:x,y:z, where w and y are bitwidths and x and y are values. They
3956 then pack them all together. We do a little better in that we allow
3957 them in words, longs, etc. and we'll pack them in target byte order
3960 The rules are: pack least significant bit first, if a field doesn't
3961 entirely fit, put it in the next unit. Overflowing the bitfield is
3962 explicitly *not* even a warning. The bitwidth should be considered
3965 To use this function the tc-XXX.h file should define
3966 BITFIELD_CONS_EXPRESSIONS. */
3969 parse_bitfield_cons (exp, nbytes)
3971 unsigned int nbytes;
3973 unsigned int bits_available = BITS_PER_CHAR * nbytes;
3974 char *hold = input_line_pointer;
3976 (void) expression (exp);
3978 if (*input_line_pointer == ':')
3985 unsigned long width;
3987 if (*input_line_pointer != ':')
3989 input_line_pointer = hold;
3991 } /* Next piece is not a bitfield. */
3993 /* In the general case, we can't allow
3994 full expressions with symbol
3995 differences and such. The relocation
3996 entries for symbols not defined in this
3997 assembly would require arbitrary field
3998 widths, positions, and masks which most
3999 of our current object formats don't
4002 In the specific case where a symbol
4003 *is* defined in this assembly, we
4004 *could* build fixups and track it, but
4005 this could lead to confusion for the
4006 backends. I'm lazy. I'll take any
4007 SEG_ABSOLUTE. I think that means that
4008 you can use a previous .set or
4009 .equ type symbol. xoxorich. */
4011 if (exp->X_op == O_absent)
4013 as_warn (_("using a bit field width of zero"));
4014 exp->X_add_number = 0;
4015 exp->X_op = O_constant;
4016 } /* Implied zero width bitfield. */
4018 if (exp->X_op != O_constant)
4020 *input_line_pointer = '\0';
4021 as_bad (_("field width \"%s\" too complex for a bitfield"), hold);
4022 *input_line_pointer = ':';
4023 demand_empty_rest_of_line ();
4025 } /* Too complex. */
4027 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
4029 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4030 width, nbytes, (BITS_PER_CHAR * nbytes));
4031 width = BITS_PER_CHAR * nbytes;
4034 if (width > bits_available)
4036 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4037 input_line_pointer = hold;
4038 exp->X_add_number = value;
4043 hold = ++input_line_pointer;
4045 (void) expression (exp);
4046 if (exp->X_op != O_constant)
4048 char cache = *input_line_pointer;
4050 *input_line_pointer = '\0';
4051 as_bad (_("field value \"%s\" too complex for a bitfield"), hold);
4052 *input_line_pointer = cache;
4053 demand_empty_rest_of_line ();
4055 } /* Too complex. */
4057 value |= ((~(-1 << width) & exp->X_add_number)
4058 << ((BITS_PER_CHAR * nbytes) - bits_available));
4060 if ((bits_available -= width) == 0
4061 || is_it_end_of_statement ()
4062 || *input_line_pointer != ',')
4065 } /* All the bitfields we're gonna get. */
4067 hold = ++input_line_pointer;
4068 (void) expression (exp);
4071 exp->X_add_number = value;
4072 exp->X_op = O_constant;
4073 exp->X_unsigned = 1;
4077 #endif /* BITFIELD_CONS_EXPRESSIONS */
4079 /* Handle an MRI style string expression. */
4083 parse_mri_cons (exp, nbytes)
4085 unsigned int nbytes;
4087 if (*input_line_pointer != '\''
4088 && (input_line_pointer[1] != '\''
4089 || (*input_line_pointer != 'A'
4090 && *input_line_pointer != 'E')))
4091 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
4095 unsigned int result = 0;
4097 /* An MRI style string. Cut into as many bytes as will fit into
4098 a nbyte chunk, left justify if necessary, and separate with
4099 commas so we can try again later. */
4100 if (*input_line_pointer == 'A')
4101 ++input_line_pointer;
4102 else if (*input_line_pointer == 'E')
4104 as_bad (_("EBCDIC constants are not supported"));
4105 ++input_line_pointer;
4108 input_line_pointer++;
4109 for (scan = 0; scan < nbytes; scan++)
4111 if (*input_line_pointer == '\'')
4113 if (input_line_pointer[1] == '\'')
4115 input_line_pointer++;
4120 result = (result << 8) | (*input_line_pointer++);
4124 while (scan < nbytes)
4130 /* Create correct expression. */
4131 exp->X_op = O_constant;
4132 exp->X_add_number = result;
4134 /* Fake it so that we can read the next char too. */
4135 if (input_line_pointer[0] != '\'' ||
4136 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
4138 input_line_pointer -= 2;
4139 input_line_pointer[0] = ',';
4140 input_line_pointer[1] = '\'';
4143 input_line_pointer++;
4146 #endif /* TC_M68K */
4148 #ifdef REPEAT_CONS_EXPRESSIONS
4150 /* Parse a repeat expression for cons. This is used by the MIPS
4151 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4152 object file COUNT times.
4154 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4157 parse_repeat_cons (exp, nbytes)
4159 unsigned int nbytes;
4166 if (*input_line_pointer != ':')
4168 /* No repeat count. */
4172 ++input_line_pointer;
4173 expression (&count);
4174 if (count.X_op != O_constant
4175 || count.X_add_number <= 0)
4177 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4181 /* The cons function is going to output this expression once. So we
4182 output it count - 1 times. */
4183 for (i = count.X_add_number - 1; i > 0; i--)
4184 emit_expr (exp, nbytes);
4187 #endif /* REPEAT_CONS_EXPRESSIONS */
4189 /* Parse a floating point number represented as a hex constant. This
4190 permits users to specify the exact bits they want in the floating
4194 hex_float (int float_type, char *bytes)
4226 as_bad (_("unknown floating type type '%c'"), float_type);
4230 /* It would be nice if we could go through expression to parse the
4231 hex constant, but if we get a bignum it's a pain to sort it into
4232 the buffer correctly. */
4234 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
4238 /* The MRI assembler accepts arbitrary underscores strewn about
4239 through the hex constant, so we ignore them as well. */
4240 if (*input_line_pointer == '_')
4242 ++input_line_pointer;
4248 as_warn (_("floating point constant too large"));
4251 d = hex_value (*input_line_pointer) << 4;
4252 ++input_line_pointer;
4253 while (*input_line_pointer == '_')
4254 ++input_line_pointer;
4255 if (hex_p (*input_line_pointer))
4257 d += hex_value (*input_line_pointer);
4258 ++input_line_pointer;
4260 if (target_big_endian)
4263 bytes[length - i - 1] = d;
4269 if (target_big_endian)
4270 memset (bytes + i, 0, length - i);
4272 memset (bytes, 0, length - i);
4280 CONStruct some more frag chars of .floats .ffloats etc.
4281 Makes 0 or more new frags.
4282 If need_pass_2 == 1, no frags are emitted.
4283 This understands only floating literals, not expressions. Sorry.
4285 A floating constant is defined by atof_generic(), except it is preceded
4286 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4287 reading, I decided to be incompatible. This always tries to give you
4288 rounded bits to the precision of the pseudo-op. Former AS did premature
4289 truncation, restored noisy bits instead of trailing 0s AND gave you
4290 a choice of 2 flavours of noise according to which of 2 floating-point
4291 scanners you directed AS to use.
4293 In: input_line_pointer->whitespace before, or '0' of flonum. */
4296 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4297 register int float_type /* 'f':.ffloat ... 'F':.float ... */)
4300 int length; /* Number of chars in an object. */
4301 register char *err; /* Error from scanning floating literal. */
4302 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
4304 if (is_it_end_of_statement ())
4306 demand_empty_rest_of_line ();
4310 #ifdef md_flush_pending_output
4311 md_flush_pending_output ();
4316 /* input_line_pointer->1st char of a flonum (we hope!). */
4319 /* Skip any 0{letter} that may be present. Don't even check if the
4320 letter is legal. Someone may invent a "z" format and this routine
4321 has no use for such information. Lusers beware: you get
4322 diagnostics if your input is ill-conditioned. */
4323 if (input_line_pointer[0] == '0'
4324 && ISALPHA (input_line_pointer[1]))
4325 input_line_pointer += 2;
4327 /* Accept :xxxx, where the x's are hex digits, for a floating
4328 point with the exact digits specified. */
4329 if (input_line_pointer[0] == ':')
4331 ++input_line_pointer;
4332 length = hex_float (float_type, temp);
4335 ignore_rest_of_line ();
4341 err = md_atof (float_type, temp, &length);
4342 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
4346 as_bad (_("bad floating literal: %s"), err);
4347 ignore_rest_of_line ();
4358 #ifdef REPEAT_CONS_EXPRESSIONS
4359 if (*input_line_pointer == ':')
4361 expressionS count_exp;
4363 ++input_line_pointer;
4364 expression (&count_exp);
4366 if (count_exp.X_op != O_constant
4367 || count_exp.X_add_number <= 0)
4368 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4370 count = count_exp.X_add_number;
4374 while (--count >= 0)
4376 p = frag_more (length);
4377 memcpy (p, temp, (unsigned int) length);
4382 while (*input_line_pointer++ == ',');
4384 /* Put terminator back into stream. */
4385 --input_line_pointer;
4386 demand_empty_rest_of_line ();
4389 /* Return the size of a LEB128 value. */
4392 sizeof_sleb128 (offsetT value)
4394 register int size = 0;
4395 register unsigned byte;
4399 byte = (value & 0x7f);
4400 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4401 Fortunately, we can structure things so that the extra work reduces
4402 to a noop on systems that do things "properly". */
4403 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4406 while (!(((value == 0) && ((byte & 0x40) == 0))
4407 || ((value == -1) && ((byte & 0x40) != 0))));
4413 sizeof_uleb128 (valueT value)
4415 register int size = 0;
4416 register unsigned byte;
4420 byte = (value & 0x7f);
4430 sizeof_leb128 (valueT value, int sign)
4433 return sizeof_sleb128 ((offsetT) value);
4435 return sizeof_uleb128 (value);
4438 /* Output a LEB128 value. */
4441 output_sleb128 (char *p, offsetT value)
4443 register char *orig = p;
4448 unsigned byte = (value & 0x7f);
4450 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4451 Fortunately, we can structure things so that the extra work reduces
4452 to a noop on systems that do things "properly". */
4453 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4455 more = !((((value == 0) && ((byte & 0x40) == 0))
4456 || ((value == -1) && ((byte & 0x40) != 0))));
4468 output_uleb128 (char *p, valueT value)
4474 unsigned byte = (value & 0x7f);
4477 /* More bytes to follow. */
4488 output_leb128 (char *p, valueT value, int sign)
4491 return output_sleb128 (p, (offsetT) value);
4493 return output_uleb128 (p, value);
4496 /* Do the same for bignums. We combine sizeof with output here in that
4497 we don't output for NULL values of P. It isn't really as critical as
4498 for "normal" values that this be streamlined. */
4501 output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
4508 /* Strip leading sign extensions off the bignum. */
4510 && bignum[size - 1] == LITTLENUM_MASK
4511 && bignum[size - 2] > LITTLENUM_MASK / 2)
4516 /* OR in the next part of the littlenum. */
4517 val |= (*bignum << loaded);
4518 loaded += LITTLENUM_NUMBER_OF_BITS;
4522 /* Add bytes until there are less than 7 bits left in VAL
4523 or until every non-sign bit has been written. */
4530 || val != ((byte & 0x40) == 0 ? 0 : ((valueT) 1 << loaded) - 1))
4537 while ((byte & 0x80) != 0 && loaded >= 7);
4541 /* Mop up any left-over bits (of which there will be less than 7). */
4542 if ((byte & 0x80) != 0)
4544 /* Sign-extend VAL. */
4545 if (val & (1 << (loaded - 1)))
4546 val |= ~0 << loaded;
4556 output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
4563 /* Strip leading zeros off the bignum. */
4564 /* XXX: Is this needed? */
4565 while (size > 0 && bignum[size - 1] == 0)
4570 if (loaded < 7 && size > 0)
4572 val |= (*bignum << loaded);
4573 loaded += 8 * CHARS_PER_LITTLENUM;
4582 if (size > 0 || val)
4589 while (byte & 0x80);
4595 output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, int size, int sign)
4598 return output_big_sleb128 (p, bignum, size);
4600 return output_big_uleb128 (p, bignum, size);
4603 /* Generate the appropriate fragments for a given expression to emit a
4607 emit_leb128_expr (expressionS *exp, int sign)
4609 operatorT op = exp->X_op;
4610 unsigned int nbytes;
4612 if (op == O_absent || op == O_illegal)
4614 as_warn (_("zero assumed for missing expression"));
4615 exp->X_add_number = 0;
4618 else if (op == O_big && exp->X_add_number <= 0)
4620 as_bad (_("floating point number invalid"));
4621 exp->X_add_number = 0;
4624 else if (op == O_register)
4626 as_warn (_("register value used as expression"));
4629 else if (op == O_constant
4631 && (exp->X_add_number < 0) != !exp->X_unsigned)
4633 /* We're outputting a signed leb128 and the sign of X_add_number
4634 doesn't reflect the sign of the original value. Convert EXP
4635 to a correctly-extended bignum instead. */
4636 convert_to_bignum (exp);
4640 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
4641 a signal that this is leb128 data. It shouldn't optimize this away. */
4642 nbytes = (unsigned int) -1;
4643 if (check_eh_frame (exp, &nbytes))
4646 /* Let the backend know that subsequent data may be byte aligned. */
4647 #ifdef md_cons_align
4651 if (op == O_constant)
4653 /* If we've got a constant, emit the thing directly right now. */
4655 valueT value = exp->X_add_number;
4659 size = sizeof_leb128 (value, sign);
4660 p = frag_more (size);
4661 output_leb128 (p, value, sign);
4663 else if (op == O_big)
4665 /* O_big is a different sort of constant. */
4670 size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
4671 p = frag_more (size);
4672 output_big_leb128 (p, generic_bignum, exp->X_add_number, sign);
4676 /* Otherwise, we have to create a variable sized fragment and
4677 resolve things later. */
4679 frag_var (rs_leb128, sizeof_uleb128 (~(valueT) 0), 0, sign,
4680 make_expr_symbol (exp), 0, (char *) NULL);
4684 /* Parse the .sleb128 and .uleb128 pseudos. */
4691 #ifdef md_flush_pending_output
4692 md_flush_pending_output ();
4698 emit_leb128_expr (&exp, sign);
4700 while (*input_line_pointer++ == ',');
4702 input_line_pointer--;
4703 demand_empty_rest_of_line ();
4706 /* We read 0 or more ',' separated, double-quoted strings.
4707 Caller should have checked need_pass_2 is FALSE because we don't
4711 stringer (/* Worker to do .ascii etc statements. */
4712 /* Checks end-of-line. */
4713 register int append_zero /* 0: don't append '\0', else 1. */)
4715 register unsigned int c;
4718 #ifdef md_flush_pending_output
4719 md_flush_pending_output ();
4722 /* The following awkward logic is to parse ZERO or more strings,
4723 comma separated. Recall a string expression includes spaces
4724 before the opening '\"' and spaces after the closing '\"'.
4725 We fake a leading ',' if there is (supposed to be)
4726 a 1st, expression. We keep demanding expressions for each ','. */
4727 if (is_it_end_of_statement ())
4729 c = 0; /* Skip loop. */
4730 ++input_line_pointer; /* Compensate for end of loop. */
4734 c = ','; /* Do loop. */
4736 /* If we have been switched into the abs_section then we
4737 will not have an obstack onto which we can hang strings. */
4738 if (now_seg == absolute_section)
4740 as_bad (_("strings must be placed into a section"));
4742 ignore_rest_of_line ();
4745 while (c == ',' || c == '<' || c == '"')
4748 switch (*input_line_pointer)
4751 ++input_line_pointer; /*->1st char of string. */
4752 start = input_line_pointer;
4753 while (is_a_char (c = next_char_of_string ()))
4755 FRAG_APPEND_1_CHAR (c);
4759 FRAG_APPEND_1_CHAR (0);
4761 know (input_line_pointer[-1] == '\"');
4765 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
4766 will emit .string with a filename in the .debug section
4767 after a sequence of constants. See the comment in
4768 emit_expr for the sequence. emit_expr will set
4769 dwarf_file_string to non-zero if this string might be a
4770 source file name. */
4771 if (strcmp (segment_name (now_seg), ".debug") != 0)
4772 dwarf_file_string = 0;
4773 else if (dwarf_file_string)
4775 c = input_line_pointer[-1];
4776 input_line_pointer[-1] = '\0';
4777 listing_source_file (start);
4778 input_line_pointer[-1] = c;
4785 input_line_pointer++;
4786 c = get_single_number ();
4787 FRAG_APPEND_1_CHAR (c);
4788 if (*input_line_pointer != '>')
4790 as_bad (_("expected <nn>"));
4792 input_line_pointer++;
4795 input_line_pointer++;
4799 c = *input_line_pointer;
4802 demand_empty_rest_of_line ();
4805 /* FIXME-SOMEDAY: I had trouble here on characters with the
4806 high bits set. We'll probably also have trouble with
4807 multibyte chars, wide chars, etc. Also be careful about
4808 returning values bigger than 1 byte. xoxorich. */
4811 next_char_of_string (void)
4813 register unsigned int c;
4815 c = *input_line_pointer++ & CHAR_MASK;
4823 as_warn (_("unterminated string; newline inserted"));
4824 bump_line_counters ();
4827 #ifndef NO_STRING_ESCAPES
4829 switch (c = *input_line_pointer++)
4857 break; /* As itself. */
4873 for (i = 0, number = 0;
4874 ISDIGIT (c) && i < 3;
4875 c = *input_line_pointer++, i++)
4877 number = number * 8 + c - '0';
4882 --input_line_pointer;
4891 c = *input_line_pointer++;
4892 while (ISXDIGIT (c))
4895 number = number * 16 + c - '0';
4896 else if (ISUPPER (c))
4897 number = number * 16 + c - 'A' + 10;
4899 number = number * 16 + c - 'a' + 10;
4900 c = *input_line_pointer++;
4903 --input_line_pointer;
4908 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
4909 as_warn (_("unterminated string; newline inserted"));
4911 bump_line_counters ();
4916 #ifdef ONLY_STANDARD_ESCAPES
4917 as_bad (_("bad escaped character in string"));
4919 #endif /* ONLY_STANDARD_ESCAPES */
4924 #endif /* ! defined (NO_STRING_ESCAPES) */
4933 get_segmented_expression (register expressionS *expP)
4935 register segT retval;
4937 retval = expression (expP);
4938 if (expP->X_op == O_illegal
4939 || expP->X_op == O_absent
4940 || expP->X_op == O_big)
4942 as_bad (_("expected address expression"));
4943 expP->X_op = O_constant;
4944 expP->X_add_number = 0;
4945 retval = absolute_section;
4951 get_known_segmented_expression (register expressionS *expP)
4953 register segT retval;
4955 if ((retval = get_segmented_expression (expP)) == undefined_section)
4957 /* There is no easy way to extract the undefined symbol from the
4959 if (expP->X_add_symbol != NULL
4960 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
4961 as_warn (_("symbol \"%s\" undefined; zero assumed"),
4962 S_GET_NAME (expP->X_add_symbol));
4964 as_warn (_("some symbol undefined; zero assumed"));
4965 retval = absolute_section;
4966 expP->X_op = O_constant;
4967 expP->X_add_number = 0;
4969 know (retval == absolute_section || SEG_NORMAL (retval));
4973 char /* Return terminator. */
4974 get_absolute_expression_and_terminator (long *val_pointer /* Return value of expression. */)
4976 /* FIXME: val_pointer should probably be offsetT *. */
4977 *val_pointer = (long) get_absolute_expression ();
4978 return (*input_line_pointer++);
4981 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
4982 Give a warning if that happens. */
4985 demand_copy_C_string (int *len_pointer)
4989 if ((s = demand_copy_string (len_pointer)) != 0)
4993 for (len = *len_pointer; len > 0; len--)
5000 as_bad (_("this string may not contain \'\\0\'"));
5008 /* Demand string, but return a safe (=private) copy of the string.
5009 Return NULL if we can't read a string here. */
5012 demand_copy_string (int *lenP)
5014 register unsigned int c;
5020 if (*input_line_pointer == '\"')
5022 input_line_pointer++; /* Skip opening quote. */
5024 while (is_a_char (c = next_char_of_string ()))
5026 obstack_1grow (¬es, c);
5029 /* JF this next line is so demand_copy_C_string will return a
5030 null terminated string. */
5031 obstack_1grow (¬es, '\0');
5032 retval = obstack_finish (¬es);
5036 as_bad (_("missing string"));
5038 ignore_rest_of_line ();
5044 /* In: Input_line_pointer->next character.
5046 Do: Skip input_line_pointer over all whitespace.
5048 Out: 1 if input_line_pointer->end-of-line. */
5051 is_it_end_of_statement (void)
5054 return (is_end_of_line[(unsigned char) *input_line_pointer]);
5058 equals (char *sym_name, int reassign)
5063 input_line_pointer++;
5064 if (*input_line_pointer == '=')
5065 input_line_pointer++;
5066 if (reassign < 0 && *input_line_pointer == '=')
5067 input_line_pointer++;
5069 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
5070 input_line_pointer++;
5073 stop = mri_comment_field (&stopc);
5075 assign_symbol (sym_name, reassign >= 0 ? !reassign : reassign);
5079 demand_empty_rest_of_line ();
5080 mri_comment_end (stop, stopc);
5084 /* .incbin -- include a file verbatim at the current location. */
5087 s_incbin (int x ATTRIBUTE_UNUSED)
5098 #ifdef md_flush_pending_output
5099 md_flush_pending_output ();
5103 filename = demand_copy_string (& len);
5104 if (filename == NULL)
5109 /* Look for optional skip and count. */
5110 if (* input_line_pointer == ',')
5112 ++ input_line_pointer;
5113 skip = get_absolute_expression ();
5117 if (* input_line_pointer == ',')
5119 ++ input_line_pointer;
5121 count = get_absolute_expression ();
5123 as_warn (_(".incbin count zero, ignoring `%s'"), filename);
5129 demand_empty_rest_of_line ();
5131 /* Try opening absolute path first, then try include dirs. */
5132 binfile = fopen (filename, FOPEN_RB);
5133 if (binfile == NULL)
5137 path = xmalloc ((unsigned long) len + include_dir_maxlen + 5);
5139 for (i = 0; i < include_dir_count; i++)
5141 sprintf (path, "%s/%s", include_dirs[i], filename);
5143 binfile = fopen (path, FOPEN_RB);
5144 if (binfile != NULL)
5148 if (binfile == NULL)
5149 as_bad (_("file not found: %s"), filename);
5152 path = xstrdup (filename);
5158 register_dependency (path);
5160 /* Compute the length of the file. */
5161 if (fseek (binfile, 0, SEEK_END) != 0)
5163 as_bad (_("seek to end of .incbin file failed `%s'"), path);
5166 file_len = ftell (binfile);
5168 /* If a count was not specified use the remainder of the file. */
5170 count = file_len - skip;
5172 if (skip < 0 || count < 0 || file_len < 0 || skip + count > file_len)
5174 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5175 skip, count, file_len);
5179 if (fseek (binfile, skip, SEEK_SET) != 0)
5181 as_bad (_("could not skip to %ld in file `%s'"), skip, path);
5185 /* Allocate frag space and store file contents in it. */
5186 binfrag = frag_more (count);
5188 bytes = fread (binfrag, 1, count, binfile);
5190 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5191 path, bytes, count);
5194 if (binfile != NULL)
5200 /* .include -- include a file at this point. */
5203 s_include (int arg ATTRIBUTE_UNUSED)
5212 filename = demand_copy_string (&i);
5213 if (filename == NULL)
5215 /* demand_copy_string has already printed an error and
5216 called ignore_rest_of_line. */
5224 while (!is_end_of_line[(unsigned char) *input_line_pointer]
5225 && *input_line_pointer != ' '
5226 && *input_line_pointer != '\t')
5228 obstack_1grow (¬es, *input_line_pointer);
5229 ++input_line_pointer;
5233 obstack_1grow (¬es, '\0');
5234 filename = obstack_finish (¬es);
5235 while (!is_end_of_line[(unsigned char) *input_line_pointer])
5236 ++input_line_pointer;
5239 demand_empty_rest_of_line ();
5240 path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ );
5242 for (i = 0; i < include_dir_count; i++)
5244 strcpy (path, include_dirs[i]);
5246 strcat (path, filename);
5247 if (0 != (try = fopen (path, FOPEN_RT)))
5257 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5258 register_dependency (path);
5259 input_scrub_insert_file (path);
5263 add_include_dir (char *path)
5267 if (include_dir_count == 0)
5269 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
5270 include_dirs[0] = "."; /* Current dir. */
5271 include_dir_count = 2;
5275 include_dir_count++;
5277 (char **) realloc (include_dirs,
5278 include_dir_count * sizeof (*include_dirs));
5281 include_dirs[include_dir_count - 1] = path; /* New one. */
5284 if (i > include_dir_maxlen)
5285 include_dir_maxlen = i;
5288 /* Output debugging information to denote the source file. */
5291 generate_file_debug (void)
5293 if (debug_type == DEBUG_STABS)
5294 stabs_generate_asm_file ();
5297 /* Output line number debugging information for the current source line. */
5300 generate_lineno_debug (void)
5304 case DEBUG_UNSPECIFIED:
5309 stabs_generate_asm_lineno ();
5312 ecoff_generate_asm_lineno ();
5315 /* ??? We could here indicate to dwarf2dbg.c that something
5316 has changed. However, since there is additional backend
5317 support that is required (calling dwarf2_emit_insn), we
5318 let dwarf2dbg.c call as_where on its own. */
5323 /* Output debugging information to mark a function entry point or end point.
5324 END_P is zero for .func, and non-zero for .endfunc. */
5329 do_s_func (end_p, NULL);
5332 /* Subroutine of s_func so targets can choose a different default prefix.
5333 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5336 do_s_func (int end_p, const char *default_prefix)
5338 /* Record the current function so that we can issue an error message for
5339 misplaced .func,.endfunc, and also so that .endfunc needs no
5341 static char *current_name;
5342 static char *current_label;
5346 if (current_name == NULL)
5348 as_bad (_("missing .func"));
5349 ignore_rest_of_line ();
5353 if (debug_type == DEBUG_STABS)
5354 stabs_generate_asm_endfunc (current_name, current_label);
5356 current_name = current_label = NULL;
5361 char delim1, delim2;
5363 if (current_name != NULL)
5365 as_bad (_(".endfunc missing for previous .func"));
5366 ignore_rest_of_line ();
5370 name = input_line_pointer;
5371 delim1 = get_symbol_end ();
5372 name = xstrdup (name);
5373 *input_line_pointer = delim1;
5375 if (*input_line_pointer != ',')
5378 asprintf (&label, "%s%s", default_prefix, name);
5381 char leading_char = bfd_get_symbol_leading_char (stdoutput);
5382 /* Missing entry point, use function's name with the leading
5385 asprintf (&label, "%c%s", leading_char, name);
5392 ++input_line_pointer;
5394 label = input_line_pointer;
5395 delim2 = get_symbol_end ();
5396 label = xstrdup (label);
5397 *input_line_pointer = delim2;
5400 if (debug_type == DEBUG_STABS)
5401 stabs_generate_asm_func (name, label);
5403 current_name = name;
5404 current_label = label;
5407 demand_empty_rest_of_line ();
5411 s_ignore (int arg ATTRIBUTE_UNUSED)
5413 ignore_rest_of_line ();
5417 read_print_statistics (FILE *file)
5419 hash_print_statistics (file, "pseudo-op table", po_hash);
5422 /* Inserts the given line into the input stream.
5424 This call avoids macro/conditionals nesting checking, since the contents of
5425 the line are assumed to replace the contents of a line already scanned.
5427 An appropriate use of this function would be substitution of input lines when
5428 called by md_start_line_hook(). The given line is assumed to already be
5429 properly scrubbed. */
5432 input_scrub_insert_line (const char *line)
5436 sb_add_string (&newline, line);
5437 input_scrub_include_sb (&newline, input_line_pointer, 0);
5439 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5442 /* Insert a file into the input stream; the path must resolve to an actual
5443 file; no include path searching or dependency registering is performed. */
5446 input_scrub_insert_file (char *path)
5448 input_scrub_include_file (path, input_line_pointer);
5449 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5452 /* Find the end of a line, considering quotation and escaping of quotes. */
5454 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5455 # define TC_SINGLE_QUOTE_STRINGS 1
5459 _find_end_of_line (char *s, int mri_string, int insn ATTRIBUTE_UNUSED)
5461 char inquote = '\0';
5464 while (!is_end_of_line[(unsigned char) *s]
5465 || (inquote && !ISCNTRL (*s))
5466 || (inquote == '\'' && flag_mri)
5467 #ifdef TC_EOL_IN_INSN
5468 || (insn && TC_EOL_IN_INSN (s))
5472 if (mri_string && *s == '\'')
5476 else if (*s == '\\')
5480 #ifdef TC_SINGLE_QUOTE_STRINGS
5481 || (TC_SINGLE_QUOTE_STRINGS && *s == '\'')
5488 as_warn (_("missing closing `%c'"), inquote);
5490 as_warn (_("stray `\\'"));
5495 find_end_of_line (char *s, int mri_string)
5497 return _find_end_of_line (s, mri_string, 0);