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, 2008, 2009,
4 2010 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 3, 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,z) (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 2 if this character is a line separator. */
130 char is_end_of_line[256] = {
132 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
134 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
136 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
137 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
140 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
141 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
142 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
143 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
144 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
145 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
146 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
147 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
148 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
150 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
153 #ifndef TC_CASE_SENSITIVE
154 char original_case_string[128];
157 /* Functions private to this file. */
159 static char *buffer; /* 1st char of each buffer of lines is here. */
160 static char *buffer_limit; /*->1 + last char in buffer. */
162 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
163 in the tc-<CPU>.h file. See the "Porting GAS" section of the
165 int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
167 /* Variables for handling include file directory table. */
169 /* Table of pointers to directories to search for .include's. */
172 /* How many are in the table. */
173 int include_dir_count;
175 /* Length of longest in table. */
176 int include_dir_maxlen = 1;
178 #ifndef WORKING_DOT_WORD
179 struct broken_word *broken_words;
180 int new_broken_words;
183 /* The current offset into the absolute section. We don't try to
184 build frags in the absolute section, since no data can be stored
185 there. We just keep track of the current offset. */
186 addressT abs_section_offset;
188 /* If this line had an MRI style label, it is stored in this variable.
189 This is used by some of the MRI pseudo-ops. */
192 /* This global variable is used to support MRI common sections. We
193 translate such sections into a common symbol. This variable is
194 non-NULL when we are in an MRI common section. */
195 symbolS *mri_common_symbol;
197 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
198 need to align to an even byte boundary unless the next pseudo-op is
199 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
201 static int mri_pending_align;
205 /* This variable is set to be non-zero if the next string we see might
206 be the name of the source file in DWARF debugging information. See
207 the comment in emit_expr for the format we look for. */
208 static int dwarf_file_string;
212 static void do_s_func (int end_p, const char *default_prefix);
213 static void do_align (int, char *, int, int);
214 static void s_align (int, int);
215 static void s_altmacro (int);
216 static void s_bad_end (int);
218 static void s_gnu_attribute (int);
220 static void s_reloc (int);
221 static int hex_float (int, char *);
222 static segT get_known_segmented_expression (expressionS * expP);
223 static void pobegin (void);
224 static int get_non_macro_line_sb (sb *);
225 static void generate_file_debug (void);
226 static char *_find_end_of_line (char *, int, int, int);
234 obj_read_begin_hook ();
236 /* Something close -- but not too close -- to a multiple of 1024.
237 The debugging malloc I'm using has 24 bytes of overhead. */
238 obstack_begin (¬es, chunksize);
239 obstack_begin (&cond_obstack, chunksize);
241 /* Use machine dependent syntax. */
242 for (p = line_separator_chars; *p; p++)
243 is_end_of_line[(unsigned char) *p] = 2;
244 /* Use more. FIXME-SOMEDAY. */
250 #ifndef TC_ADDRESS_BYTES
251 #define TC_ADDRESS_BYTES address_bytes
256 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
257 contain an address. */
258 int n = (stdoutput->arch_info->bits_per_address - 1) / 8;
266 /* Set up pseudo-op tables. */
268 static struct hash_control *po_hash;
270 static const pseudo_typeS potable[] = {
271 {"abort", s_abort, 0},
272 {"align", s_align_ptwo, 0},
273 {"altmacro", s_altmacro, 1},
274 {"ascii", stringer, 8+0},
275 {"asciz", stringer, 8+1},
276 {"balign", s_align_bytes, 0},
277 {"balignw", s_align_bytes, -2},
278 {"balignl", s_align_bytes, -4},
282 {"common", s_mri_common, 0},
283 {"common.s", s_mri_common, 1},
286 #ifdef TC_ADDRESS_BYTES
290 {"dc.d", float_cons, 'd'},
292 {"dc.s", float_cons, 'f'},
294 {"dc.x", float_cons, 'x'},
296 {"dcb.b", s_space, 1},
297 {"dcb.d", s_float_space, 'd'},
298 {"dcb.l", s_space, 4},
299 {"dcb.s", s_float_space, 'f'},
300 {"dcb.w", s_space, 2},
301 {"dcb.x", s_float_space, 'x'},
303 {"ds.b", s_space, 1},
304 {"ds.d", s_space, 8},
305 {"ds.l", s_space, 4},
306 {"ds.p", s_space, 12},
307 {"ds.s", s_space, 4},
308 {"ds.w", s_space, 2},
309 {"ds.x", s_space, 12},
310 {"debug", s_ignore, 0},
315 {"double", float_cons, 'd'},
317 {"eject", listing_eject, 0}, /* Formfeed listing. */
319 {"elsec", s_else, 0},
320 {"elseif", s_elseif, (int) O_ne},
322 {"endc", s_endif, 0},
323 {"endfunc", s_func, 1},
324 {"endif", s_endif, 0},
325 {"endm", s_bad_end, 0},
326 {"endr", s_bad_end, 1},
332 {"error", s_errwarn, 1},
333 {"exitm", s_mexit, 0},
335 {"extern", s_ignore, 0}, /* We treat all undef as ext. */
336 {"appfile", s_app_file, 1},
337 {"appline", s_app_line, 1},
339 {"file", s_app_file, 0},
341 {"float", float_cons, 'f'},
342 {"format", s_ignore, 0},
344 {"global", s_globl, 0},
345 {"globl", s_globl, 0},
347 {"gnu_attribute", s_gnu_attribute, 0},
350 {"if", s_if, (int) O_ne},
353 {"ifdef", s_ifdef, 0},
354 {"ifeq", s_if, (int) O_eq},
355 {"ifeqs", s_ifeqs, 0},
356 {"ifge", s_if, (int) O_ge},
357 {"ifgt", s_if, (int) O_gt},
358 {"ifle", s_if, (int) O_le},
359 {"iflt", s_if, (int) O_lt},
362 {"ifndef", s_ifdef, 1},
363 {"ifne", s_if, (int) O_ne},
364 {"ifnes", s_ifeqs, 1},
365 {"ifnotdef", s_ifdef, 1},
366 {"incbin", s_incbin, 0},
367 {"include", s_include, 0},
373 {"lcomm", s_lcomm, 0},
374 {"lflags", s_ignore, 0}, /* Listing flags. */
375 {"linefile", s_app_line, 0},
376 {"linkonce", s_linkonce, 0},
377 {"list", listing_list, 1}, /* Turn listing on. */
378 {"llen", listing_psize, 1},
381 {"macro", s_macro, 0},
382 {"mexit", s_mexit, 0},
384 {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
385 {"name", s_ignore, 0},
386 {"noaltmacro", s_altmacro, 0},
387 {"noformat", s_ignore, 0},
388 {"nolist", listing_list, 0}, /* Turn listing off. */
389 {"nopage", listing_nopage, 0},
391 {"offset", s_struct, 0},
393 {"p2align", s_align_ptwo, 0},
394 {"p2alignw", s_align_ptwo, -2},
395 {"p2alignl", s_align_ptwo, -4},
396 {"page", listing_eject, 0},
397 {"plen", listing_psize, 0},
398 {"print", s_print, 0},
399 {"psize", listing_psize, 0}, /* Set paper size. */
400 {"purgem", s_purgem, 0},
402 {"reloc", s_reloc, 0},
406 {"sbttl", listing_title, 1}, /* Subtitle of listing. */
411 {"single", float_cons, 'f'},
413 {"space", s_space, 0},
414 {"skip", s_space, 0},
415 {"sleb128", s_leb128, 1},
416 {"spc", s_ignore, 0},
417 {"stabd", s_stab, 'd'},
418 {"stabn", s_stab, 'n'},
419 {"stabs", s_stab, 's'},
420 {"string", stringer, 8+1},
421 {"string8", stringer, 8+1},
422 {"string16", stringer, 16+1},
423 {"string32", stringer, 32+1},
424 {"string64", stringer, 64+1},
425 {"struct", s_struct, 0},
429 /* This is for gcc to use. It's only just been added (2/94), so gcc
430 won't be able to use it for a while -- probably a year or more.
431 But once this has been released, check with gcc maintainers
432 before deleting it or even changing the spelling. */
433 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
434 /* If we're folding case -- done for some targets, not necessarily
435 all -- the above string in an input file will be converted to
436 this one. Match it either way... */
437 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
439 {"title", listing_title, 0}, /* Listing title. */
440 {"ttl", listing_title, 0},
442 {"uleb128", s_leb128, 0},
446 {"xdef", s_globl, 0},
447 {"xref", s_ignore, 0},
448 {"xstabs", s_xstab, 's'},
449 {"warning", s_errwarn, 0},
450 {"weakref", s_weakref, 0},
452 {"zero", s_space, 0},
453 {NULL, NULL, 0} /* End sentinel. */
457 get_absolute_expr (expressionS *exp)
459 expression_and_evaluate (exp);
460 if (exp->X_op != O_constant)
462 if (exp->X_op != O_absent)
463 as_bad (_("bad or irreducible absolute expression"));
464 exp->X_add_number = 0;
466 return exp->X_add_number;
470 get_absolute_expression (void)
474 return get_absolute_expr (&exp);
477 static int pop_override_ok = 0;
478 static const char *pop_table_name;
481 pop_insert (const pseudo_typeS *table)
484 const pseudo_typeS *pop;
485 for (pop = table; pop->poc_name; pop++)
487 errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
488 if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
489 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name,
494 #ifndef md_pop_insert
495 #define md_pop_insert() pop_insert(md_pseudo_table)
498 #ifndef obj_pop_insert
499 #define obj_pop_insert() pop_insert(obj_pseudo_table)
502 #ifndef cfi_pop_insert
503 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
509 po_hash = hash_new ();
511 /* Do the target-specific pseudo ops. */
512 pop_table_name = "md";
515 /* Now object specific. Skip any that were in the target table. */
516 pop_table_name = "obj";
520 /* Now portable ones. Skip any that we've seen already. */
521 pop_table_name = "standard";
522 pop_insert (potable);
524 #ifdef TARGET_USE_CFIPOP
525 pop_table_name = "cfi";
531 #define HANDLE_CONDITIONAL_ASSEMBLY() \
532 if (ignore_input ()) \
534 char *eol = find_end_of_line (input_line_pointer, flag_m68k_mri); \
535 input_line_pointer = (input_line_pointer <= buffer_limit \
536 && eol >= buffer_limit) \
542 /* This function is used when scrubbing the characters between #APP
545 static char *scrub_string;
546 static char *scrub_string_end;
549 scrub_from_string (char *buf, int buflen)
553 copy = scrub_string_end - scrub_string;
556 memcpy (buf, scrub_string, copy);
557 scrub_string += copy;
561 /* Helper function of read_a_source_file, which tries to expand a macro. */
563 try_macro (char term, const char *line)
569 if (check_macro (line, &out, &err, ¯o))
573 *input_line_pointer++ = term;
574 input_scrub_include_sb (&out,
575 input_line_pointer, 1);
578 input_scrub_next_buffer (&input_line_pointer);
580 md_macro_info (macro);
587 /* We read the file, putting things into a web that represents what we
588 have been reading. */
590 read_a_source_file (char *name)
593 char *s; /* String of symbol, '\0' appended. */
601 buffer = input_scrub_new_file (name);
604 listing_newline (NULL);
605 register_dependency (name);
607 /* Generate debugging information before we've read anything in to denote
608 this file as the "main" source file and not a subordinate one
609 (e.g. N_SO vs N_SOL in stabs). */
610 generate_file_debug ();
612 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
613 { /* We have another line to parse. */
615 /* In order to avoid listing macro expansion lines with labels
616 multiple times, keep track of which line was last issued. */
617 static char *last_eol;
621 while (input_line_pointer < buffer_limit)
623 bfd_boolean was_new_line;
624 /* We have more of this buffer to parse. */
626 /* We now have input_line_pointer->1st char of next line.
627 If input_line_pointer [-1] == '\n' then we just
628 scanned another line: so bump line counters. */
629 was_new_line = is_end_of_line[(unsigned char) input_line_pointer[-1]];
632 #ifdef md_start_line_hook
633 md_start_line_hook ();
635 if (input_line_pointer[-1] == '\n')
636 bump_line_counters ();
640 /* If listing is on, and we are expanding a macro, then give
641 the listing code the contents of the expanded line. */
644 if ((listing & LISTING_MACEXP) && macro_nest > 0)
646 /* Find the end of the current expanded macro line. */
647 s = find_end_of_line (input_line_pointer, flag_m68k_mri);
655 /* Copy it for safe keeping. Also give an indication of
656 how much macro nesting is involved at this point. */
657 len = s - input_line_pointer;
658 copy = (char *) xmalloc (len + macro_nest + 2);
659 memset (copy, '>', macro_nest);
660 copy[macro_nest] = ' ';
661 memcpy (copy + macro_nest + 1, input_line_pointer, len);
662 copy[macro_nest + 1 + len] = '\0';
664 /* Install the line with the listing facility. */
665 listing_newline (copy);
669 listing_newline (NULL);
676 if (LABELS_WITHOUT_COLONS || flag_m68k_mri)
678 /* Text at the start of a line must be a label, we
679 run down and stick a colon in. */
680 if (is_name_beginner (*input_line_pointer))
682 char *line_start = input_line_pointer;
685 HANDLE_CONDITIONAL_ASSEMBLY ();
687 c = get_symbol_end ();
689 /* In MRI mode, the EQU and MACRO pseudoops must
690 be handled specially. */
694 char *rest = input_line_pointer + 1;
698 if (*rest == ' ' || *rest == '\t')
700 if ((strncasecmp (rest, "EQU", 3) == 0
701 || strncasecmp (rest, "SET", 3) == 0)
702 && (rest[3] == ' ' || rest[3] == '\t'))
704 input_line_pointer = rest + 3;
706 strncasecmp (rest, "SET", 3) == 0);
709 if (strncasecmp (rest, "MACRO", 5) == 0
712 || is_end_of_line[(unsigned char) rest[5]]))
716 /* In MRI mode, we need to handle the MACRO
717 pseudo-op specially: we don't want to put the
718 symbol in the symbol table. */
720 #ifdef TC_START_LABEL_WITHOUT_COLON
721 && TC_START_LABEL_WITHOUT_COLON(c,
725 line_label = colon (line_start);
727 line_label = symbol_create (line_start,
732 *input_line_pointer = c;
734 input_line_pointer++;
739 /* We are at the beginning of a line, or similar place.
740 We expect a well-formed assembler statement.
741 A "symbol-name:" is a statement.
743 Depending on what compiler is used, the order of these tests
744 may vary to catch most common case 1st.
745 Each test is independent of all other tests at the (top)
748 c = *input_line_pointer++;
749 while (c == '\t' || c == ' ' || c == '\f');
751 /* C is the 1st significant character.
752 Input_line_pointer points after that character. */
753 if (is_name_beginner (c))
755 /* Want user-defined label or pseudo/opcode. */
756 HANDLE_CONDITIONAL_ASSEMBLY ();
758 s = --input_line_pointer;
759 c = get_symbol_end (); /* name's delimiter. */
761 /* C is character after symbol.
762 That character's place in the input line is now '\0'.
763 S points to the beginning of the symbol.
764 [In case of pseudo-op, s->'.'.]
765 Input_line_pointer->'\0' where c was. */
766 if (TC_START_LABEL (c, s, input_line_pointer))
770 char *rest = input_line_pointer + 1;
772 /* In MRI mode, \tsym: set 0 is permitted. */
776 if (*rest == ' ' || *rest == '\t')
779 if ((strncasecmp (rest, "EQU", 3) == 0
780 || strncasecmp (rest, "SET", 3) == 0)
781 && (rest[3] == ' ' || rest[3] == '\t'))
783 input_line_pointer = rest + 3;
789 line_label = colon (s); /* User-defined label. */
790 /* Put ':' back for error messages' sake. */
791 *input_line_pointer++ = ':';
792 #ifdef tc_check_label
793 tc_check_label (line_label);
795 /* Input_line_pointer->after ':'. */
798 else if ((c == '=' && input_line_pointer[1] == '=')
799 || ((c == ' ' || c == '\t')
800 && input_line_pointer[1] == '='
801 && input_line_pointer[2] == '='))
804 demand_empty_rest_of_line ();
807 || ((c == ' ' || c == '\t')
808 && input_line_pointer[1] == '='))
809 #ifdef TC_EQUAL_IN_INSN
810 && !TC_EQUAL_IN_INSN (c, s)
815 demand_empty_rest_of_line ();
819 /* Expect pseudo-op or machine instruction. */
822 #ifndef TC_CASE_SENSITIVE
826 strncpy (original_case_string, s2, sizeof (original_case_string));
827 original_case_string[sizeof (original_case_string) - 1] = 0;
836 if (NO_PSEUDO_DOT || flag_m68k_mri)
838 /* The MRI assembler uses pseudo-ops without
840 pop = (pseudo_typeS *) hash_find (po_hash, s);
841 if (pop != NULL && pop->poc_handler == NULL)
846 || (!flag_m68k_mri && *s == '.'))
850 WARNING: c has next char, which may be end-of-line.
851 We lookup the pseudo-op table with s+1 because we
852 already know that the pseudo-op begins with a '.'. */
855 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
856 if (pop && !pop->poc_handler)
859 /* In MRI mode, we may need to insert an
860 automatic alignment directive. What a hack
862 if (mri_pending_align
864 || !((pop->poc_handler == cons
865 && pop->poc_val == 1)
866 || (pop->poc_handler == s_space
867 && pop->poc_val == 1)
868 #ifdef tc_conditional_pseudoop
869 || tc_conditional_pseudoop (pop)
871 || pop->poc_handler == s_if
872 || pop->poc_handler == s_ifdef
873 || pop->poc_handler == s_ifc
874 || pop->poc_handler == s_ifeqs
875 || pop->poc_handler == s_else
876 || pop->poc_handler == s_endif
877 || pop->poc_handler == s_globl
878 || pop->poc_handler == s_ignore)))
880 do_align (1, (char *) NULL, 0, 0);
881 mri_pending_align = 0;
883 if (line_label != NULL)
885 symbol_set_frag (line_label, frag_now);
886 S_SET_VALUE (line_label, frag_now_fix ());
890 /* Print the error msg now, while we still can. */
893 char *end = input_line_pointer;
895 *input_line_pointer = c;
897 c = *--input_line_pointer;
898 *input_line_pointer = '\0';
899 if (! macro_defined || ! try_macro (c, s))
902 as_bad (_("unknown pseudo-op: `%s'"), s);
903 *input_line_pointer++ = c;
908 /* Put it back for error messages etc. */
909 *input_line_pointer = c;
910 /* The following skip of whitespace is compulsory.
911 A well shaped space is sometimes all that separates
912 keyword from operands. */
913 if (c == ' ' || c == '\t')
914 input_line_pointer++;
916 /* Input_line is restored.
917 Input_line_pointer->1st non-blank char
918 after pseudo-operation. */
919 (*pop->poc_handler) (pop->poc_val);
921 /* If that was .end, just get out now. */
922 if (pop->poc_handler == s_end)
927 /* WARNING: c has char, which may be end-of-line. */
928 /* Also: input_line_pointer->`\0` where c was. */
929 *input_line_pointer = c;
930 input_line_pointer = _find_end_of_line (input_line_pointer, flag_m68k_mri, 1, 0);
931 c = *input_line_pointer;
932 *input_line_pointer = '\0';
934 generate_lineno_debug ();
936 if (macro_defined && try_macro (c, s))
939 if (mri_pending_align)
941 do_align (1, (char *) NULL, 0, 0);
942 mri_pending_align = 0;
943 if (line_label != NULL)
945 symbol_set_frag (line_label, frag_now);
946 S_SET_VALUE (line_label, frag_now_fix ());
950 md_assemble (s); /* Assemble 1 instruction. */
952 *input_line_pointer++ = c;
954 /* We resume loop AFTER the end-of-line from
961 /* Empty statement? */
962 if (is_end_of_line[(unsigned char) c])
965 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) && ISDIGIT (c))
967 /* local label ("4:") */
968 char *backup = input_line_pointer;
970 HANDLE_CONDITIONAL_ASSEMBLY ();
974 /* Read the whole number. */
975 while (ISDIGIT (*input_line_pointer))
977 temp = (temp * 10) + *input_line_pointer - '0';
978 ++input_line_pointer;
981 if (LOCAL_LABELS_DOLLAR
982 && *input_line_pointer == '$'
983 && *(input_line_pointer + 1) == ':')
985 input_line_pointer += 2;
987 if (dollar_label_defined (temp))
989 as_fatal (_("label \"%d$\" redefined"), temp);
992 define_dollar_label (temp);
993 colon (dollar_label_name (temp, 0));
998 && *input_line_pointer++ == ':')
1000 fb_label_instance_inc (temp);
1001 colon (fb_label_name (temp, 0));
1005 input_line_pointer = backup;
1006 } /* local label ("4:") */
1008 if (c && strchr (line_comment_chars, c))
1009 { /* Its a comment. Better say APP or NO_APP. */
1014 unsigned int new_length;
1017 s = input_line_pointer;
1018 if (strncmp (s, "APP\n", 4))
1021 ignore_rest_of_line ();
1024 bump_line_counters ();
1028 ends = strstr (s, "#NO_APP\n");
1032 unsigned int tmp_len;
1035 /* The end of the #APP wasn't in this buffer. We
1036 keep reading in buffers until we find the #NO_APP
1037 that goes with this #APP There is one. The specs
1039 tmp_len = buffer_limit - s;
1040 tmp_buf = (char *) xmalloc (tmp_len + 1);
1041 memcpy (tmp_buf, s, tmp_len);
1044 new_tmp = input_scrub_next_buffer (&buffer);
1048 buffer_limit = new_tmp;
1049 input_line_pointer = buffer;
1050 ends = strstr (buffer, "#NO_APP\n");
1052 num = ends - buffer;
1054 num = buffer_limit - buffer;
1056 tmp_buf = (char *) xrealloc (tmp_buf, tmp_len + num);
1057 memcpy (tmp_buf + tmp_len, buffer, num);
1062 input_line_pointer = ends ? ends + 8 : NULL;
1070 input_line_pointer = ends + 8;
1074 scrub_string_end = ends;
1076 new_length = ends - s;
1077 new_buf = (char *) xmalloc (new_length);
1084 space = (new_buf + new_length) - new_tmp;
1085 size = do_scrub_chars (scrub_from_string, new_tmp, space);
1093 new_buf = (char *) xrealloc (new_buf, new_length + 100);
1094 new_tmp = new_buf + new_length;
1101 /* We've "scrubbed" input to the preferred format. In the
1102 process we may have consumed the whole of the remaining
1103 file (and included files). We handle this formatted
1104 input similar to that of macro expansion, letting
1105 actual macro expansion (possibly nested) and other
1106 input expansion work. Beware that in messages, line
1107 numbers and possibly file names will be incorrect. */
1108 sb_add_string (&sbuf, new_buf);
1109 input_scrub_include_sb (&sbuf, input_line_pointer, 0);
1111 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1116 HANDLE_CONDITIONAL_ASSEMBLY ();
1118 #ifdef tc_unrecognized_line
1119 if (tc_unrecognized_line (c))
1122 input_line_pointer--;
1123 /* Report unknown char as error. */
1124 demand_empty_rest_of_line ();
1127 #ifdef md_after_pass_hook
1128 md_after_pass_hook ();
1137 /* Close the input file. */
1138 input_scrub_close ();
1139 #ifdef WARN_COMMENTS
1141 if (warn_comment && found_comment)
1142 as_warn_where (found_comment_file, found_comment,
1143 "first comment found here");
1148 /* Convert O_constant expression EXP into the equivalent O_big representation.
1149 Take the sign of the number from X_unsigned rather than X_add_number. */
1152 convert_to_bignum (expressionS *exp)
1157 value = exp->X_add_number;
1158 for (i = 0; i < sizeof (exp->X_add_number) / CHARS_PER_LITTLENUM; i++)
1160 generic_bignum[i] = value & LITTLENUM_MASK;
1161 value >>= LITTLENUM_NUMBER_OF_BITS;
1163 /* Add a sequence of sign bits if the top bit of X_add_number is not
1164 the sign of the original value. */
1165 if ((exp->X_add_number < 0) != !exp->X_unsigned)
1166 generic_bignum[i++] = exp->X_unsigned ? 0 : LITTLENUM_MASK;
1168 exp->X_add_number = i;
1171 /* For most MRI pseudo-ops, the line actually ends at the first
1172 nonquoted space. This function looks for that point, stuffs a null
1173 in, and sets *STOPCP to the character that used to be there, and
1174 returns the location.
1176 Until I hear otherwise, I am going to assume that this is only true
1177 for the m68k MRI assembler. */
1180 mri_comment_field (char *stopcp)
1186 know (flag_m68k_mri);
1188 for (s = input_line_pointer;
1189 ((!is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
1197 for (s = input_line_pointer;
1198 !is_end_of_line[(unsigned char) *s];
1208 /* Skip to the end of an MRI comment field. */
1211 mri_comment_end (char *stop, int stopc)
1215 input_line_pointer = stop;
1217 while (!is_end_of_line[(unsigned char) *input_line_pointer])
1218 ++input_line_pointer;
1222 s_abort (int ignore ATTRIBUTE_UNUSED)
1224 as_fatal (_(".abort detected. Abandoning ship."));
1227 /* Guts of .align directive. N is the power of two to which to align.
1228 FILL may be NULL, or it may point to the bytes of the fill pattern.
1229 LEN is the length of whatever FILL points to, if anything. MAX is
1230 the maximum number of characters to skip when doing the alignment,
1231 or 0 if there is no maximum. */
1234 do_align (int n, char *fill, int len, int max)
1236 if (now_seg == absolute_section)
1240 if (*fill++ != '\0')
1242 as_warn (_("ignoring fill value in absolute section"));
1249 #ifdef md_flush_pending_output
1250 md_flush_pending_output ();
1253 md_do_align (n, fill, len, max, just_record_alignment);
1256 /* Only make a frag if we HAVE to... */
1257 if (n != 0 && !need_pass_2)
1261 if (subseg_text_p (now_seg))
1262 frag_align_code (n, max);
1264 frag_align (n, 0, max);
1267 frag_align (n, *fill, max);
1269 frag_align_pattern (n, fill, len, max);
1273 just_record_alignment: ATTRIBUTE_UNUSED_LABEL
1276 record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
1279 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1280 (in bytes). A negative ARG is the negative of the length of the
1281 fill pattern. BYTES_P is non-zero if the alignment value should be
1282 interpreted as the byte boundary, rather than the power of 2. */
1283 #ifndef TC_ALIGN_LIMIT
1284 #define TC_ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1288 s_align (int arg, int bytes_p)
1290 unsigned int align_limit = TC_ALIGN_LIMIT;
1299 stop = mri_comment_field (&stopc);
1301 if (is_end_of_line[(unsigned char) *input_line_pointer])
1306 align = arg; /* Default value from pseudo-op table. */
1310 align = get_absolute_expression ();
1316 /* Convert to a power of 2. */
1321 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1324 as_bad (_("alignment not a power of 2"));
1330 if (align > align_limit)
1332 align = align_limit;
1333 as_warn (_("alignment too large: %u assumed"), align);
1336 if (*input_line_pointer != ',')
1343 ++input_line_pointer;
1344 if (*input_line_pointer == ',')
1348 fill = get_absolute_expression ();
1353 if (*input_line_pointer != ',')
1357 ++input_line_pointer;
1358 max = get_absolute_expression ();
1365 as_warn (_("expected fill pattern missing"));
1366 do_align (align, (char *) NULL, 0, max);
1381 do_align (align, &fill_char, fill_len, max);
1387 if ((size_t) fill_len > sizeof ab)
1389 md_number_to_chars (ab, fill, fill_len);
1390 do_align (align, ab, fill_len, max);
1394 demand_empty_rest_of_line ();
1397 mri_comment_end (stop, stopc);
1400 /* Handle the .align pseudo-op on machines where ".align 4" means
1401 align to a 4 byte boundary. */
1404 s_align_bytes (int arg)
1409 /* Handle the .align pseudo-op on machines where ".align 4" means align
1410 to a 2**4 boundary. */
1413 s_align_ptwo (int arg)
1418 /* Switch in and out of alternate macro mode. */
1423 demand_empty_rest_of_line ();
1424 macro_set_alternate (on);
1428 s_comm_internal (int param,
1429 symbolS *(*comm_parse_extra) (int, symbolS *, addressT))
1435 symbolS *symbolP = NULL;
1441 stop = mri_comment_field (&stopc);
1443 name = input_line_pointer;
1444 c = get_symbol_end ();
1445 /* Just after name is now '\0'. */
1446 p = input_line_pointer;
1451 as_bad (_("expected symbol name"));
1452 ignore_rest_of_line ();
1458 /* Accept an optional comma after the name. The comma used to be
1459 required, but Irix 5 cc does not generate it for .lcomm. */
1460 if (*input_line_pointer == ',')
1461 input_line_pointer++;
1463 temp = get_absolute_expr (&exp);
1465 size &= ((offsetT) 2 << (stdoutput->arch_info->bits_per_address - 1)) - 1;
1466 if (exp.X_op == O_absent)
1468 as_bad (_("missing size expression"));
1469 ignore_rest_of_line ();
1472 else if (temp != size || !exp.X_unsigned)
1474 as_warn (_("size (%ld) out of range, ignored"), (long) temp);
1475 ignore_rest_of_line ();
1480 symbolP = symbol_find_or_make (name);
1481 if ((S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
1482 && !S_IS_COMMON (symbolP))
1484 if (!S_IS_VOLATILE (symbolP))
1487 as_bad (_("symbol `%s' is already defined"), name);
1489 ignore_rest_of_line ();
1492 symbolP = symbol_clone (symbolP, 1);
1493 S_SET_SEGMENT (symbolP, undefined_section);
1494 S_SET_VALUE (symbolP, 0);
1495 symbol_set_frag (symbolP, &zero_address_frag);
1496 S_CLEAR_VOLATILE (symbolP);
1499 size = S_GET_VALUE (symbolP);
1502 else if (size != temp)
1503 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1504 name, (long) size, (long) temp);
1507 if (comm_parse_extra != NULL)
1508 symbolP = (*comm_parse_extra) (param, symbolP, size);
1511 S_SET_VALUE (symbolP, (valueT) size);
1512 S_SET_EXTERNAL (symbolP);
1513 S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
1516 extern int flag_one;
1517 if (size == 0 || !flag_one)
1518 S_GET_OTHER (symbolP) = const_flag;
1523 demand_empty_rest_of_line ();
1526 mri_comment_end (stop, stopc);
1533 s_comm_internal (ignore, NULL);
1536 /* The MRI COMMON pseudo-op. We handle this by creating a common
1537 symbol with the appropriate name. We make s_space do the right
1538 thing by increasing the size. */
1541 s_mri_common (int small ATTRIBUTE_UNUSED)
1557 stop = mri_comment_field (&stopc);
1561 name = input_line_pointer;
1562 if (!ISDIGIT (*name))
1563 c = get_symbol_end ();
1568 ++input_line_pointer;
1570 while (ISDIGIT (*input_line_pointer));
1572 c = *input_line_pointer;
1573 *input_line_pointer = '\0';
1575 if (line_label != NULL)
1577 alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
1578 + (input_line_pointer - name)
1580 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1585 sym = symbol_find_or_make (name);
1586 *input_line_pointer = c;
1590 if (*input_line_pointer != ',')
1594 ++input_line_pointer;
1595 align = get_absolute_expression ();
1598 if (S_IS_DEFINED (sym) && !S_IS_COMMON (sym))
1600 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym));
1601 ignore_rest_of_line ();
1602 mri_comment_end (stop, stopc);
1606 S_SET_EXTERNAL (sym);
1607 S_SET_SEGMENT (sym, bfd_com_section_ptr);
1608 mri_common_symbol = sym;
1612 S_SET_ALIGN (sym, align);
1615 if (line_label != NULL)
1618 exp.X_op = O_symbol;
1619 exp.X_add_symbol = sym;
1620 exp.X_add_number = 0;
1621 symbol_set_value_expression (line_label, &exp);
1622 symbol_set_frag (line_label, &zero_address_frag);
1623 S_SET_SEGMENT (line_label, expr_section);
1626 /* FIXME: We just ignore the small argument, which distinguishes
1627 COMMON and COMMON.S. I don't know what we can do about it. */
1629 /* Ignore the type and hptype. */
1630 if (*input_line_pointer == ',')
1631 input_line_pointer += 2;
1632 if (*input_line_pointer == ',')
1633 input_line_pointer += 2;
1635 demand_empty_rest_of_line ();
1637 mri_comment_end (stop, stopc);
1641 s_data (int ignore ATTRIBUTE_UNUSED)
1646 temp = get_absolute_expression ();
1647 if (flag_readonly_data_in_text)
1649 section = text_section;
1653 section = data_section;
1655 subseg_set (section, (subsegT) temp);
1660 demand_empty_rest_of_line ();
1663 /* Handle the .appfile pseudo-op. This is automatically generated by
1664 do_scrub_chars when a preprocessor # line comment is seen with a
1665 file name. This default definition may be overridden by the object
1666 or CPU specific pseudo-ops. This function is also the default
1667 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1671 s_app_file_string (char *file, int appfile ATTRIBUTE_UNUSED)
1675 listing_source_file (file);
1677 register_dependency (file);
1679 obj_app_file (file, appfile);
1684 s_app_file (int appfile)
1689 /* Some assemblers tolerate immediately following '"'. */
1690 if ((s = demand_copy_string (&length)) != 0)
1693 = (!new_logical_line_flags (s, -1, 1) && appfile);
1695 /* In MRI mode, the preprocessor may have inserted an extraneous
1698 && *input_line_pointer == '\''
1699 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1700 ++input_line_pointer;
1702 demand_empty_rest_of_line ();
1704 s_app_file_string (s, appfile);
1709 get_linefile_number (int *flag)
1713 if (*input_line_pointer < '0' || *input_line_pointer > '9')
1716 *flag = get_absolute_expression ();
1721 /* Handle the .appline pseudo-op. This is automatically generated by
1722 do_scrub_chars when a preprocessor # line comment is seen. This
1723 default definition may be overridden by the object or CPU specific
1727 s_app_line (int appline)
1732 /* The given number is that of the next line. */
1734 l = get_absolute_expression ();
1735 else if (!get_linefile_number (&l))
1737 ignore_rest_of_line ();
1744 /* Some of the back ends can't deal with non-positive line numbers.
1745 Besides, it's silly. GCC however will generate a line number of
1746 zero when it is pre-processing builtins for assembler-with-cpp files:
1750 We do not want to barf on this, especially since such files are used
1751 in the GCC and GDB testsuites. So we check for negative line numbers
1752 rather than non-positive line numbers. */
1753 as_warn (_("line numbers must be positive; line number %d rejected"),
1764 if (*input_line_pointer == '"')
1765 file = demand_copy_string (&length);
1771 while (get_linefile_number (&this_flag))
1774 /* From GCC's cpp documentation:
1775 1: start of a new file.
1776 2: returning to a file after having included
1778 3: following text comes from a system header file.
1779 4: following text should be treated as extern "C".
1781 4 is nonsensical for the assembler; 3, we don't
1782 care about, so we ignore it just in case a
1783 system header file is included while
1784 preprocessing assembly. So 1 and 2 are all we
1785 care about, and they are mutually incompatible.
1786 new_logical_line_flags() demands this. */
1789 if (flags && flags != (1 << this_flag))
1790 as_warn (_("incompatible flag %i in line directive"),
1793 flags |= 1 << this_flag;
1798 /* We ignore these. */
1802 as_warn (_("unsupported flag %i in line directive"),
1807 if (!is_end_of_line[(unsigned char)*input_line_pointer])
1812 if (appline || file)
1814 new_logical_line_flags (file, l, flags);
1817 listing_source_line (l);
1821 if (appline || file)
1822 demand_empty_rest_of_line ();
1824 ignore_rest_of_line ();
1827 /* Handle the .end pseudo-op. Actually, the real work is done in
1828 read_a_source_file. */
1831 s_end (int ignore ATTRIBUTE_UNUSED)
1835 /* The MRI assembler permits the start symbol to follow .end,
1836 but we don't support that. */
1838 if (!is_end_of_line[(unsigned char) *input_line_pointer]
1839 && *input_line_pointer != '*'
1840 && *input_line_pointer != '!')
1841 as_warn (_("start address not supported"));
1845 /* Handle the .err pseudo-op. */
1848 s_err (int ignore ATTRIBUTE_UNUSED)
1850 as_bad (_(".err encountered"));
1851 demand_empty_rest_of_line ();
1854 /* Handle the .error and .warning pseudo-ops. */
1860 /* The purpose for the conditional assignment is not to
1861 internationalize the directive itself, but that we need a
1862 self-contained message, one that can be passed like the
1863 demand_copy_C_string return value, and with no assumption on the
1864 location of the name of the directive within the message. */
1866 = (err ? _(".error directive invoked in source file")
1867 : _(".warning directive invoked in source file"));
1869 if (!is_it_end_of_statement ())
1871 if (*input_line_pointer != '\"')
1873 as_bad (_("%s argument must be a string"),
1874 err ? ".error" : ".warning");
1875 ignore_rest_of_line ();
1879 msg = demand_copy_C_string (&len);
1887 as_warn ("%s", msg);
1888 demand_empty_rest_of_line ();
1891 /* Handle the MRI fail pseudo-op. */
1894 s_fail (int ignore ATTRIBUTE_UNUSED)
1901 stop = mri_comment_field (&stopc);
1903 temp = get_absolute_expression ();
1905 as_warn (_(".fail %ld encountered"), (long) temp);
1907 as_bad (_(".fail %ld encountered"), (long) temp);
1909 demand_empty_rest_of_line ();
1912 mri_comment_end (stop, stopc);
1916 s_fill (int ignore ATTRIBUTE_UNUSED)
1918 expressionS rep_exp;
1923 #ifdef md_flush_pending_output
1924 md_flush_pending_output ();
1927 #ifdef md_cons_align
1931 get_known_segmented_expression (&rep_exp);
1932 if (*input_line_pointer == ',')
1934 input_line_pointer++;
1935 size = get_absolute_expression ();
1936 if (*input_line_pointer == ',')
1938 input_line_pointer++;
1939 fill = get_absolute_expression ();
1943 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1944 #define BSD_FILL_SIZE_CROCK_8 (8)
1945 if (size > BSD_FILL_SIZE_CROCK_8)
1947 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8);
1948 size = BSD_FILL_SIZE_CROCK_8;
1952 as_warn (_("size negative; .fill ignored"));
1955 else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
1957 if (rep_exp.X_add_number < 0)
1958 as_warn (_("repeat < 0; .fill ignored"));
1962 if (size && !need_pass_2)
1964 if (rep_exp.X_op == O_constant)
1966 p = frag_var (rs_fill, (int) size, (int) size,
1967 (relax_substateT) 0, (symbolS *) 0,
1968 (offsetT) rep_exp.X_add_number,
1973 /* We don't have a constant repeat count, so we can't use
1974 rs_fill. We can get the same results out of rs_space,
1975 but its argument is in bytes, so we must multiply the
1976 repeat count by size. */
1979 rep_sym = make_expr_symbol (&rep_exp);
1982 expressionS size_exp;
1983 size_exp.X_op = O_constant;
1984 size_exp.X_add_number = size;
1986 rep_exp.X_op = O_multiply;
1987 rep_exp.X_add_symbol = rep_sym;
1988 rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
1989 rep_exp.X_add_number = 0;
1990 rep_sym = make_expr_symbol (&rep_exp);
1993 p = frag_var (rs_space, (int) size, (int) size,
1994 (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
1997 memset (p, 0, (unsigned int) size);
1999 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
2000 flavoured AS. The following bizarre behaviour is to be
2001 compatible with above. I guess they tried to take up to 8
2002 bytes from a 4-byte expression and they forgot to sign
2004 #define BSD_FILL_SIZE_CROCK_4 (4)
2005 md_number_to_chars (p, (valueT) fill,
2006 (size > BSD_FILL_SIZE_CROCK_4
2007 ? BSD_FILL_SIZE_CROCK_4
2009 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
2010 but emits no error message because it seems a legal thing to do.
2011 It is a degenerate case of .fill but could be emitted by a
2014 demand_empty_rest_of_line ();
2018 s_globl (int ignore ATTRIBUTE_UNUSED)
2027 stop = mri_comment_field (&stopc);
2031 name = input_line_pointer;
2032 c = get_symbol_end ();
2033 symbolP = symbol_find_or_make (name);
2034 S_SET_EXTERNAL (symbolP);
2036 *input_line_pointer = c;
2038 c = *input_line_pointer;
2041 input_line_pointer++;
2043 if (is_end_of_line[(unsigned char) *input_line_pointer])
2049 demand_empty_rest_of_line ();
2052 mri_comment_end (stop, stopc);
2056 #define skip_whitespace(str) do { if (*(str) == ' ') ++(str); } while (0)
2059 skip_past_char (char ** str, char c)
2069 #define skip_past_comma(str) skip_past_char (str, ',')
2071 /* Parse an attribute directive for VENDOR.
2072 Returns the attribute number read, or zero on error. */
2074 s_vendor_attribute (int vendor)
2082 /* Read the first number or name. */
2083 skip_whitespace (input_line_pointer);
2084 s = input_line_pointer;
2085 if (ISDIGIT (*input_line_pointer))
2088 if (exp.X_op != O_constant)
2090 tag = exp.X_add_number;
2096 /* A name may contain '_', but no other punctuation. */
2097 for (; ISALNUM (*input_line_pointer) || *input_line_pointer == '_';
2098 ++input_line_pointer)
2103 name = (char *) alloca (i + 1);
2104 memcpy (name, s, i);
2107 #ifndef CONVERT_SYMBOLIC_ATTRIBUTE
2108 #define CONVERT_SYMBOLIC_ATTRIBUTE(a) -1
2111 tag = CONVERT_SYMBOLIC_ATTRIBUTE (name);
2114 as_bad (_("Attribute name not recognised: %s"), name);
2115 ignore_rest_of_line ();
2120 type = _bfd_elf_obj_attrs_arg_type (stdoutput, vendor, tag);
2122 if (skip_past_comma (&input_line_pointer) == -1)
2127 if (exp.X_op != O_constant)
2129 as_bad (_("expected numeric constant"));
2130 ignore_rest_of_line ();
2133 i = exp.X_add_number;
2136 && skip_past_comma (&input_line_pointer) == -1)
2138 as_bad (_("expected comma"));
2139 ignore_rest_of_line ();
2146 skip_whitespace (input_line_pointer);
2147 if (*input_line_pointer != '"')
2149 s = demand_copy_C_string (&len);
2155 bfd_elf_add_obj_attr_int_string (stdoutput, vendor, tag, i, s);
2158 bfd_elf_add_obj_attr_string (stdoutput, vendor, tag, s);
2161 bfd_elf_add_obj_attr_int (stdoutput, vendor, tag, i);
2167 demand_empty_rest_of_line ();
2170 as_bad (_("bad string constant"));
2171 ignore_rest_of_line ();
2174 as_bad (_("expected <tag> , <value>"));
2175 ignore_rest_of_line ();
2179 /* Parse a .gnu_attribute directive. */
2182 s_gnu_attribute (int ignored ATTRIBUTE_UNUSED)
2184 s_vendor_attribute (OBJ_ATTR_GNU);
2186 #endif /* OBJ_ELF */
2188 /* Handle the MRI IRP and IRPC pseudo-ops. */
2199 as_where (&file, &line);
2202 eol = find_end_of_line (input_line_pointer, 0);
2203 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2204 input_line_pointer = eol;
2208 err = expand_irp (irpc, 0, &s, &out, get_non_macro_line_sb);
2210 as_bad_where (file, line, "%s", err);
2214 input_scrub_include_sb (&out, input_line_pointer, 1);
2216 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2219 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2220 the section to only be linked once. However, this is not supported
2221 by most object file formats. This takes an optional argument,
2222 which is what to do about duplicates. */
2225 s_linkonce (int ignore ATTRIBUTE_UNUSED)
2227 enum linkonce_type type;
2231 type = LINKONCE_DISCARD;
2233 if (!is_end_of_line[(unsigned char) *input_line_pointer])
2238 s = input_line_pointer;
2239 c = get_symbol_end ();
2240 if (strcasecmp (s, "discard") == 0)
2241 type = LINKONCE_DISCARD;
2242 else if (strcasecmp (s, "one_only") == 0)
2243 type = LINKONCE_ONE_ONLY;
2244 else if (strcasecmp (s, "same_size") == 0)
2245 type = LINKONCE_SAME_SIZE;
2246 else if (strcasecmp (s, "same_contents") == 0)
2247 type = LINKONCE_SAME_CONTENTS;
2249 as_warn (_("unrecognized .linkonce type `%s'"), s);
2251 *input_line_pointer = c;
2254 #ifdef obj_handle_link_once
2255 obj_handle_link_once (type);
2256 #else /* ! defined (obj_handle_link_once) */
2260 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
2261 as_warn (_(".linkonce is not supported for this object file format"));
2263 flags = bfd_get_section_flags (stdoutput, now_seg);
2264 flags |= SEC_LINK_ONCE;
2269 case LINKONCE_DISCARD:
2270 flags |= SEC_LINK_DUPLICATES_DISCARD;
2272 case LINKONCE_ONE_ONLY:
2273 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
2275 case LINKONCE_SAME_SIZE:
2276 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
2278 case LINKONCE_SAME_CONTENTS:
2279 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
2282 if (!bfd_set_section_flags (stdoutput, now_seg, flags))
2283 as_bad (_("bfd_set_section_flags: %s"),
2284 bfd_errmsg (bfd_get_error ()));
2286 #endif /* ! defined (obj_handle_link_once) */
2288 demand_empty_rest_of_line ();
2292 bss_alloc (symbolS *symbolP, addressT size, int align)
2295 segT current_seg = now_seg;
2296 subsegT current_subseg = now_subseg;
2297 segT bss_seg = bss_section;
2299 #if defined (TC_MIPS) || defined (TC_ALPHA)
2300 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
2301 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
2303 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2304 if (size <= bfd_get_gp_size (stdoutput))
2306 bss_seg = subseg_new (".sbss", 1);
2307 seg_info (bss_seg)->bss = 1;
2308 if (!bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
2309 as_warn (_("error setting flags for \".sbss\": %s"),
2310 bfd_errmsg (bfd_get_error ()));
2314 subseg_set (bss_seg, 1);
2318 record_alignment (bss_seg, align);
2319 frag_align (align, 0, 0);
2322 /* Detach from old frag. */
2323 if (S_GET_SEGMENT (symbolP) == bss_seg)
2324 symbol_get_frag (symbolP)->fr_symbol = NULL;
2326 symbol_set_frag (symbolP, frag_now);
2327 pfrag = frag_var (rs_org, 1, 1, 0, symbolP, size, NULL);
2331 S_SET_SIZE (symbolP, size);
2333 S_SET_SEGMENT (symbolP, bss_seg);
2336 /* The symbol may already have been created with a preceding
2337 ".globl" directive -- be careful not to step on storage class
2338 in that case. Otherwise, set it to static. */
2339 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
2340 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2341 #endif /* OBJ_COFF */
2343 subseg_set (current_seg, current_subseg);
2347 parse_align (int align_bytes)
2353 if (*input_line_pointer != ',')
2356 as_bad (_("expected alignment after size"));
2357 ignore_rest_of_line ();
2361 input_line_pointer++;
2364 align = get_absolute_expr (&exp);
2365 if (exp.X_op == O_absent)
2368 if (!exp.X_unsigned)
2370 as_warn (_("alignment negative; 0 assumed"));
2374 if (align_bytes && align != 0)
2376 /* convert to a power of 2 alignment */
2377 unsigned int alignp2 = 0;
2378 while ((align & 1) == 0)
2379 align >>= 1, ++alignp2;
2382 as_bad (_("alignment not a power of 2"));
2383 ignore_rest_of_line ();
2391 /* Called from s_comm_internal after symbol name and size have been
2392 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2393 1 if this was a ".bss" directive which has a 3rd argument
2394 (alignment as a power of 2), or 2 if this was a ".bss" directive
2395 with alignment in bytes. */
2398 s_lcomm_internal (int needs_align, symbolS *symbolP, addressT size)
2404 align = parse_align (needs_align - 1);
2405 if (align == (addressT) -1)
2409 /* Assume some objects may require alignment on some systems. */
2410 TC_IMPLICIT_LCOMM_ALIGNMENT (size, align);
2412 bss_alloc (symbolP, size, align);
2417 s_lcomm (int needs_align)
2419 s_comm_internal (needs_align, s_lcomm_internal);
2423 s_lcomm_bytes (int needs_align)
2425 s_comm_internal (needs_align * 2, s_lcomm_internal);
2429 s_lsym (int ignore ATTRIBUTE_UNUSED)
2437 /* We permit ANY defined expression: BSD4.2 demands constants. */
2438 name = input_line_pointer;
2439 c = get_symbol_end ();
2440 p = input_line_pointer;
2445 as_bad (_("expected symbol name"));
2446 ignore_rest_of_line ();
2452 if (*input_line_pointer != ',')
2455 as_bad (_("expected comma after \"%s\""), name);
2457 ignore_rest_of_line ();
2461 input_line_pointer++;
2462 expression_and_evaluate (&exp);
2464 if (exp.X_op != O_constant
2465 && exp.X_op != O_register)
2467 as_bad (_("bad expression"));
2468 ignore_rest_of_line ();
2473 symbolP = symbol_find_or_make (name);
2475 if (S_GET_SEGMENT (symbolP) == undefined_section)
2477 /* The name might be an undefined .global symbol; be sure to
2478 keep the "external" bit. */
2479 S_SET_SEGMENT (symbolP,
2480 (exp.X_op == O_constant
2483 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2487 as_bad (_("symbol `%s' is already defined"), name);
2491 demand_empty_rest_of_line ();
2494 /* Read a line into an sb. Returns the character that ended the line
2495 or zero if there are no more lines. */
2498 get_line_sb (sb *line, int in_macro)
2502 if (input_line_pointer[-1] == '\n')
2503 bump_line_counters ();
2505 if (input_line_pointer >= buffer_limit)
2507 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2508 if (buffer_limit == 0)
2512 eol = _find_end_of_line (input_line_pointer, flag_m68k_mri, 0, in_macro);
2513 sb_add_buffer (line, input_line_pointer, eol - input_line_pointer);
2514 input_line_pointer = eol;
2516 /* Don't skip multiple end-of-line characters, because that breaks support
2517 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2518 characters but isn't. Instead just skip one end of line character and
2519 return the character skipped so that the caller can re-insert it if
2521 return *input_line_pointer++;
2525 get_non_macro_line_sb (sb *line)
2527 return get_line_sb (line, 0);
2531 get_macro_line_sb (sb *line)
2533 return get_line_sb (line, 1);
2536 /* Define a macro. This is an interface to macro.c. */
2539 s_macro (int ignore ATTRIBUTE_UNUSED)
2547 as_where (&file, &line);
2550 eol = find_end_of_line (input_line_pointer, 0);
2551 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2552 input_line_pointer = eol;
2554 if (line_label != NULL)
2559 sb_add_string (&label, S_GET_NAME (line_label));
2560 err = define_macro (0, &s, &label, get_macro_line_sb, file, line, &name);
2564 err = define_macro (0, &s, NULL, get_macro_line_sb, file, line, &name);
2566 as_bad_where (file, line, err, name);
2569 if (line_label != NULL)
2571 S_SET_SEGMENT (line_label, absolute_section);
2572 S_SET_VALUE (line_label, 0);
2573 symbol_set_frag (line_label, &zero_address_frag);
2576 if (((NO_PSEUDO_DOT || flag_m68k_mri)
2577 && hash_find (po_hash, name) != NULL)
2580 && hash_find (po_hash, name + 1) != NULL))
2581 as_warn_where (file,
2583 _("attempt to redefine pseudo-op `%s' ignored"),
2590 /* Handle the .mexit pseudo-op, which immediately exits a macro
2594 s_mexit (int ignore ATTRIBUTE_UNUSED)
2598 cond_exit_macro (macro_nest);
2599 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2602 as_warn (_("ignoring macro exit outside a macro definition."));
2605 /* Switch in and out of MRI mode. */
2608 s_mri (int ignore ATTRIBUTE_UNUSED)
2611 #ifdef MRI_MODE_CHANGE
2615 on = get_absolute_expression ();
2616 #ifdef MRI_MODE_CHANGE
2617 old_flag = flag_mri;
2636 /* Operator precedence changes in m68k MRI mode, so we need to
2637 update the operator rankings. */
2638 expr_set_precedence ();
2640 #ifdef MRI_MODE_CHANGE
2642 MRI_MODE_CHANGE (on);
2645 demand_empty_rest_of_line ();
2648 /* Handle changing the location counter. */
2651 do_org (segT segment, expressionS *exp, int fill)
2653 if (segment != now_seg && segment != absolute_section)
2654 as_bad (_("invalid segment \"%s\""), segment_name (segment));
2656 if (now_seg == absolute_section)
2659 as_warn (_("ignoring fill value in absolute section"));
2660 if (exp->X_op != O_constant)
2662 as_bad (_("only constant offsets supported in absolute section"));
2663 exp->X_add_number = 0;
2665 abs_section_offset = exp->X_add_number;
2670 symbolS *sym = exp->X_add_symbol;
2671 offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
2673 if (exp->X_op != O_constant && exp->X_op != O_symbol)
2675 /* Handle complex expressions. */
2676 sym = make_expr_symbol (exp);
2680 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
2686 s_org (int ignore ATTRIBUTE_UNUSED)
2692 #ifdef md_flush_pending_output
2693 md_flush_pending_output ();
2696 /* The m68k MRI assembler has a different meaning for .org. It
2697 means to create an absolute section at a given address. We can't
2698 support that--use a linker script instead. */
2701 as_bad (_("MRI style ORG pseudo-op not supported"));
2702 ignore_rest_of_line ();
2706 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2707 thing as a sub-segment-relative origin. Any absolute origin is
2708 given a warning, then assumed to be segment-relative. Any
2709 segmented origin expression ("foo+42") had better be in the right
2710 segment or the .org is ignored.
2712 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2713 we never know sub-segment sizes when we are reading code. BSD
2714 will crash trying to emit negative numbers of filler bytes in
2715 certain .orgs. We don't crash, but see as-write for that code.
2717 Don't make frag if need_pass_2==1. */
2718 segment = get_known_segmented_expression (&exp);
2719 if (*input_line_pointer == ',')
2721 input_line_pointer++;
2722 temp_fill = get_absolute_expression ();
2728 do_org (segment, &exp, temp_fill);
2730 demand_empty_rest_of_line ();
2733 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2734 called by the obj-format routine which handles section changing
2735 when in MRI mode. It will create a new section, and return it. It
2736 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2737 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2740 s_mri_sect (char *type ATTRIBUTE_UNUSED)
2750 name = input_line_pointer;
2751 if (!ISDIGIT (*name))
2752 c = get_symbol_end ();
2757 ++input_line_pointer;
2759 while (ISDIGIT (*input_line_pointer));
2761 c = *input_line_pointer;
2762 *input_line_pointer = '\0';
2765 name = xstrdup (name);
2767 *input_line_pointer = c;
2769 seg = subseg_new (name, 0);
2771 if (*input_line_pointer == ',')
2775 ++input_line_pointer;
2776 align = get_absolute_expression ();
2777 record_alignment (seg, align);
2781 if (*input_line_pointer == ',')
2783 c = *++input_line_pointer;
2785 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2788 as_bad (_("unrecognized section type"));
2789 ++input_line_pointer;
2794 flags = SEC_NO_FLAGS;
2796 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2797 else if (*type == 'D' || *type == 'M')
2798 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2799 else if (*type == 'R')
2800 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2801 if (flags != SEC_NO_FLAGS)
2803 if (!bfd_set_section_flags (stdoutput, seg, flags))
2804 as_warn (_("error setting flags for \"%s\": %s"),
2805 bfd_section_name (stdoutput, seg),
2806 bfd_errmsg (bfd_get_error ()));
2811 /* Ignore the HP type. */
2812 if (*input_line_pointer == ',')
2813 input_line_pointer += 2;
2815 demand_empty_rest_of_line ();
2817 #else /* ! TC_M68K */
2826 name = input_line_pointer;
2827 c = get_symbol_end ();
2829 name = xstrdup (name);
2831 *input_line_pointer = c;
2833 seg = subseg_new (name, 0);
2835 if (*input_line_pointer != ',')
2841 ++input_line_pointer;
2843 sectype = input_line_pointer;
2844 c = get_symbol_end ();
2845 if (*sectype == '\0')
2847 else if (strcasecmp (sectype, "text") == 0)
2849 else if (strcasecmp (sectype, "data") == 0)
2851 else if (strcasecmp (sectype, "romdata") == 0)
2854 as_warn (_("unrecognized section type `%s'"), sectype);
2855 *input_line_pointer = c;
2858 if (*input_line_pointer == ',')
2862 ++input_line_pointer;
2864 seccmd = input_line_pointer;
2865 c = get_symbol_end ();
2866 if (strcasecmp (seccmd, "absolute") == 0)
2868 as_bad (_("absolute sections are not supported"));
2869 *input_line_pointer = c;
2870 ignore_rest_of_line ();
2873 else if (strcasecmp (seccmd, "align") == 0)
2877 *input_line_pointer = c;
2878 align = get_absolute_expression ();
2879 record_alignment (seg, align);
2883 as_warn (_("unrecognized section command `%s'"), seccmd);
2884 *input_line_pointer = c;
2888 demand_empty_rest_of_line ();
2890 #else /* ! TC_I960 */
2891 /* The MRI assembler seems to use different forms of .sect for
2892 different targets. */
2893 as_bad ("MRI mode not supported for this target");
2894 ignore_rest_of_line ();
2895 #endif /* ! TC_I960 */
2896 #endif /* ! TC_M68K */
2899 /* Handle the .print pseudo-op. */
2902 s_print (int ignore ATTRIBUTE_UNUSED)
2907 s = demand_copy_C_string (&len);
2910 demand_empty_rest_of_line ();
2913 /* Handle the .purgem pseudo-op. */
2916 s_purgem (int ignore ATTRIBUTE_UNUSED)
2918 if (is_it_end_of_statement ())
2920 demand_empty_rest_of_line ();
2930 name = input_line_pointer;
2931 c = get_symbol_end ();
2932 delete_macro (name);
2933 *input_line_pointer = c;
2936 while (*input_line_pointer++ == ',');
2938 --input_line_pointer;
2939 demand_empty_rest_of_line ();
2942 /* Handle the .endm/.endr pseudo-ops. */
2945 s_bad_end (int endr)
2947 as_warn (_(".end%c encountered without preceeding %s"),
2949 endr ? ".rept, .irp, or .irpc" : ".macro");
2950 demand_empty_rest_of_line ();
2953 /* Handle the .rept pseudo-op. */
2956 s_rept (int ignore ATTRIBUTE_UNUSED)
2960 count = get_absolute_expression ();
2962 do_repeat (count, "REPT", "ENDR");
2965 /* This function provides a generic repeat block implementation. It allows
2966 different directives to be used as the start/end keys. */
2969 do_repeat (int count, const char *start, const char *end)
2975 if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
2977 as_bad (_("%s without %s"), start, end);
2983 sb_add_sb (&many, &one);
2987 input_scrub_include_sb (&many, input_line_pointer, 1);
2989 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2992 /* Like do_repeat except that any text matching EXPANDER in the
2993 block is replaced by the itteration count. */
2996 do_repeat_with_expander (int count,
2999 const char * expander)
3005 if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
3007 as_bad (_("%s without %s"), start, end);
3013 if (expander != NULL && strstr (one.ptr, expander) != NULL)
3015 while (count -- > 0)
3021 sb_new (& processed);
3022 sb_add_sb (& processed, & one);
3023 sub = strstr (processed.ptr, expander);
3024 len = sprintf (sub, "%d", count);
3025 gas_assert (len < 8);
3026 strcpy (sub + len, sub + 8);
3027 processed.len -= (8 - len);
3028 sb_add_sb (& many, & processed);
3029 sb_kill (& processed);
3034 sb_add_sb (&many, &one);
3038 input_scrub_include_sb (&many, input_line_pointer, 1);
3040 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
3043 /* Skip to end of current repeat loop; EXTRA indicates how many additional
3044 input buffers to skip. Assumes that conditionals preceding the loop end
3045 are properly nested.
3047 This function makes it easier to implement a premature "break" out of the
3048 loop. The EXTRA arg accounts for other buffers we might have inserted,
3049 such as line substitutions. */
3052 end_repeat (int extra)
3054 cond_exit_macro (macro_nest);
3055 while (extra-- >= 0)
3056 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
3060 assign_symbol (char *name, int mode)
3064 if (name[0] == '.' && name[1] == '\0')
3066 /* Turn '. = mumble' into a .org mumble. */
3070 segment = get_known_segmented_expression (&exp);
3073 do_org (segment, &exp, 0);
3078 if ((symbolP = symbol_find (name)) == NULL
3079 && (symbolP = md_undefined_symbol (name)) == NULL)
3081 symbolP = symbol_find_or_make (name);
3083 /* When doing symbol listings, play games with dummy fragments living
3084 outside the normal fragment chain to record the file and line info
3086 if (listing & LISTING_SYMBOLS)
3088 extern struct list_info_struct *listing_tail;
3089 fragS *dummy_frag = (fragS *) xcalloc (1, sizeof (fragS));
3090 dummy_frag->line = listing_tail;
3091 dummy_frag->fr_symbol = symbolP;
3092 symbol_set_frag (symbolP, dummy_frag);
3096 /* "set" symbols are local unless otherwise specified. */
3097 SF_SET_LOCAL (symbolP);
3101 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
3103 /* Permit register names to be redefined. */
3104 if ((mode != 0 || !S_IS_VOLATILE (symbolP))
3105 && S_GET_SEGMENT (symbolP) != reg_section)
3107 as_bad (_("symbol `%s' is already defined"), name);
3108 symbolP = symbol_clone (symbolP, 0);
3110 /* If the symbol is volatile, copy the symbol and replace the
3111 original with the copy, so that previous uses of the symbol will
3112 retain the value of the symbol at the point of use. */
3113 else if (S_IS_VOLATILE (symbolP))
3114 symbolP = symbol_clone (symbolP, 1);
3118 S_SET_VOLATILE (symbolP);
3120 S_SET_FORWARD_REF (symbolP);
3122 pseudo_set (symbolP);
3125 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3126 then this is .equiv, and it is an error if the symbol is already
3127 defined. If EQUIV is -1, the symbol additionally is a forward
3137 /* Especial apologies for the random logic:
3138 this just grew, and could be parsed much more simply!
3140 name = input_line_pointer;
3141 delim = get_symbol_end ();
3142 end_name = input_line_pointer;
3145 if (name == end_name)
3147 as_bad (_("expected symbol name"));
3148 ignore_rest_of_line ();
3154 if (*input_line_pointer != ',')
3157 as_bad (_("expected comma after \"%s\""), name);
3159 ignore_rest_of_line ();
3163 input_line_pointer++;
3166 assign_symbol (name, equiv);
3169 demand_empty_rest_of_line ();
3182 #ifdef md_flush_pending_output
3183 md_flush_pending_output ();
3186 #ifdef md_cons_align
3191 stop = mri_comment_field (&stopc);
3193 /* In m68k MRI mode, we need to align to a word boundary, unless
3195 if (flag_m68k_mri && mult > 1)
3197 if (now_seg == absolute_section)
3199 abs_section_offset += abs_section_offset & 1;
3200 if (line_label != NULL)
3201 S_SET_VALUE (line_label, abs_section_offset);
3203 else if (mri_common_symbol != NULL)
3207 mri_val = S_GET_VALUE (mri_common_symbol);
3208 if ((mri_val & 1) != 0)
3210 S_SET_VALUE (mri_common_symbol, mri_val + 1);
3211 if (line_label != NULL)
3213 expressionS *symexp;
3215 symexp = symbol_get_value_expression (line_label);
3216 know (symexp->X_op == O_symbol);
3217 know (symexp->X_add_symbol == mri_common_symbol);
3218 symexp->X_add_number += 1;
3224 do_align (1, (char *) NULL, 0, 0);
3225 if (line_label != NULL)
3227 symbol_set_frag (line_label, frag_now);
3228 S_SET_VALUE (line_label, frag_now_fix ());
3238 if (*input_line_pointer == ',')
3240 ++input_line_pointer;
3245 val.X_op = O_constant;
3246 val.X_add_number = 0;
3249 if (val.X_op != O_constant
3250 || val.X_add_number < - 0x80
3251 || val.X_add_number > 0xff
3252 || (mult != 0 && mult != 1 && val.X_add_number != 0))
3254 resolve_expression (&exp);
3255 if (exp.X_op != O_constant)
3256 as_bad (_("unsupported variable size or fill value"));
3263 bytes = mult * exp.X_add_number;
3264 for (i = 0; i < exp.X_add_number; i++)
3265 emit_expr (&val, mult);
3270 if (now_seg == absolute_section || mri_common_symbol != NULL)
3271 resolve_expression (&exp);
3273 if (exp.X_op == O_constant)
3277 repeat = exp.X_add_number;
3284 as_warn (_(".space repeat count is zero, ignored"));
3285 else if (repeat < 0)
3286 as_warn (_(".space repeat count is negative, ignored"));
3290 /* If we are in the absolute section, just bump the offset. */
3291 if (now_seg == absolute_section)
3293 abs_section_offset += repeat;
3297 /* If we are secretly in an MRI common section, then
3298 creating space just increases the size of the common
3300 if (mri_common_symbol != NULL)
3302 S_SET_VALUE (mri_common_symbol,
3303 S_GET_VALUE (mri_common_symbol) + repeat);
3308 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
3309 (offsetT) repeat, (char *) 0);
3313 if (now_seg == absolute_section)
3315 as_bad (_("space allocation too complex in absolute section"));
3316 subseg_set (text_section, 0);
3319 if (mri_common_symbol != NULL)
3321 as_bad (_("space allocation too complex in common section"));
3322 mri_common_symbol = NULL;
3326 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
3327 make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
3331 *p = val.X_add_number;
3336 /* In MRI mode, after an odd number of bytes, we must align to an
3337 even word boundary, unless the next instruction is a dc.b, ds.b
3339 if (flag_mri && (bytes & 1) != 0)
3340 mri_pending_align = 1;
3342 demand_empty_rest_of_line ();
3345 mri_comment_end (stop, stopc);
3348 /* This is like s_space, but the value is a floating point number with
3349 the given precision. This is for the MRI dcb.s pseudo-op and
3353 s_float_space (int float_type)
3357 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3361 #ifdef md_cons_align
3366 stop = mri_comment_field (&stopc);
3368 count = get_absolute_expression ();
3371 if (*input_line_pointer != ',')
3373 as_bad (_("missing value"));
3374 ignore_rest_of_line ();
3376 mri_comment_end (stop, stopc);
3380 ++input_line_pointer;
3384 /* Skip any 0{letter} that may be present. Don't even check if the
3385 * letter is legal. */
3386 if (input_line_pointer[0] == '0'
3387 && ISALPHA (input_line_pointer[1]))
3388 input_line_pointer += 2;
3390 /* Accept :xxxx, where the x's are hex digits, for a floating point
3391 with the exact digits specified. */
3392 if (input_line_pointer[0] == ':')
3394 flen = hex_float (float_type, temp);
3397 ignore_rest_of_line ();
3399 mri_comment_end (stop, stopc);
3407 err = md_atof (float_type, temp, &flen);
3408 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
3409 know (err != NULL || flen > 0);
3412 as_bad (_("bad floating literal: %s"), err);
3413 ignore_rest_of_line ();
3415 mri_comment_end (stop, stopc);
3420 while (--count >= 0)
3424 p = frag_more (flen);
3425 memcpy (p, temp, (unsigned int) flen);
3428 demand_empty_rest_of_line ();
3431 mri_comment_end (stop, stopc);
3434 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3437 s_struct (int ignore ATTRIBUTE_UNUSED)
3443 stop = mri_comment_field (&stopc);
3444 abs_section_offset = get_absolute_expression ();
3445 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3446 /* The ELF backend needs to know that we are changing sections, so
3447 that .previous works correctly. */
3449 obj_elf_section_change_hook ();
3451 subseg_set (absolute_section, 0);
3452 demand_empty_rest_of_line ();
3454 mri_comment_end (stop, stopc);
3458 s_text (int ignore ATTRIBUTE_UNUSED)
3462 temp = get_absolute_expression ();
3463 subseg_set (text_section, (subsegT) temp);
3464 demand_empty_rest_of_line ();
3466 const_flag &= ~IN_DEFAULT_SECTION;
3470 /* .weakref x, y sets x as an alias to y that, as long as y is not
3471 referenced directly, will cause y to become a weak symbol. */
3473 s_weakref (int ignore ATTRIBUTE_UNUSED)
3482 name = input_line_pointer;
3483 delim = get_symbol_end ();
3484 end_name = input_line_pointer;
3486 if (name == end_name)
3488 as_bad (_("expected symbol name"));
3490 ignore_rest_of_line ();
3494 symbolP = symbol_find_or_make (name);
3496 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
3498 if (!S_IS_VOLATILE (symbolP))
3500 as_bad (_("symbol `%s' is already defined"), name);
3502 ignore_rest_of_line ();
3505 symbolP = symbol_clone (symbolP, 1);
3506 S_CLEAR_VOLATILE (symbolP);
3513 if (*input_line_pointer != ',')
3516 as_bad (_("expected comma after \"%s\""), name);
3518 ignore_rest_of_line ();
3522 input_line_pointer++;
3526 name = input_line_pointer;
3527 delim = get_symbol_end ();
3528 end_name = input_line_pointer;
3530 if (name == end_name)
3532 as_bad (_("expected symbol name"));
3533 ignore_rest_of_line ();
3537 if ((symbolP2 = symbol_find_noref (name, 1)) == NULL
3538 && (symbolP2 = md_undefined_symbol (name)) == NULL)
3540 symbolP2 = symbol_find_or_make (name);
3541 S_SET_WEAKREFD (symbolP2);
3545 symbolS *symp = symbolP2;
3547 while (S_IS_WEAKREFR (symp) && symp != symbolP)
3549 expressionS *expP = symbol_get_value_expression (symp);
3551 gas_assert (expP->X_op == O_symbol
3552 && expP->X_add_number == 0);
3553 symp = expP->X_add_symbol;
3555 if (symp == symbolP)
3559 loop = concat (S_GET_NAME (symbolP),
3560 " => ", S_GET_NAME (symbolP2), (const char *) NULL);
3563 while (symp != symbolP)
3565 char *old_loop = loop;
3566 symp = symbol_get_value_expression (symp)->X_add_symbol;
3567 loop = concat (loop, " => ", S_GET_NAME (symp),
3568 (const char *) NULL);
3572 as_bad (_("%s: would close weakref loop: %s"),
3573 S_GET_NAME (symbolP), loop);
3578 ignore_rest_of_line ();
3582 /* Short-circuiting instead of just checking here might speed
3583 things up a tiny little bit, but loop error messages would
3584 miss intermediate links. */
3585 /* symbolP2 = symp; */
3590 memset (&exp, 0, sizeof (exp));
3591 exp.X_op = O_symbol;
3592 exp.X_add_symbol = symbolP2;
3594 S_SET_SEGMENT (symbolP, undefined_section);
3595 symbol_set_value_expression (symbolP, &exp);
3596 symbol_set_frag (symbolP, &zero_address_frag);
3597 S_SET_WEAKREFR (symbolP);
3599 demand_empty_rest_of_line ();
3603 /* Verify that we are at the end of a line. If not, issue an error and
3607 demand_empty_rest_of_line (void)
3610 if (is_end_of_line[(unsigned char) *input_line_pointer])
3611 input_line_pointer++;
3614 if (ISPRINT (*input_line_pointer))
3615 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3616 *input_line_pointer);
3618 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3619 *input_line_pointer);
3620 ignore_rest_of_line ();
3623 /* Return pointing just after end-of-line. */
3624 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3627 /* Silently advance to the end of line. Use this after already having
3628 issued an error about something bad. */
3631 ignore_rest_of_line (void)
3633 while (input_line_pointer < buffer_limit
3634 && !is_end_of_line[(unsigned char) *input_line_pointer])
3635 input_line_pointer++;
3637 input_line_pointer++;
3639 /* Return pointing just after end-of-line. */
3640 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3643 /* Sets frag for given symbol to zero_address_frag, except when the
3644 symbol frag is already set to a dummy listing frag. */
3647 set_zero_frag (symbolS *symbolP)
3649 if (symbol_get_frag (symbolP)->fr_type != rs_dummy)
3650 symbol_set_frag (symbolP, &zero_address_frag);
3653 /* In: Pointer to a symbol.
3654 Input_line_pointer->expression.
3656 Out: Input_line_pointer->just after any whitespace after expression.
3657 Tried to set symbol to value of expression.
3658 Will change symbols type, value, and frag; */
3661 pseudo_set (symbolS *symbolP)
3666 know (symbolP); /* NULL pointer is logic error. */
3668 if (!S_IS_FORWARD_REF (symbolP))
3669 (void) expression (&exp);
3671 (void) deferred_expression (&exp);
3673 if (exp.X_op == O_illegal)
3674 as_bad (_("illegal expression"));
3675 else if (exp.X_op == O_absent)
3676 as_bad (_("missing expression"));
3677 else if (exp.X_op == O_big)
3679 if (exp.X_add_number > 0)
3680 as_bad (_("bignum invalid"));
3682 as_bad (_("floating point number invalid"));
3684 else if (exp.X_op == O_subtract
3685 && !S_IS_FORWARD_REF (symbolP)
3686 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
3687 && (symbol_get_frag (exp.X_add_symbol)
3688 == symbol_get_frag (exp.X_op_symbol)))
3690 exp.X_op = O_constant;
3691 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
3692 - S_GET_VALUE (exp.X_op_symbol));
3695 if (symbol_section_p (symbolP))
3697 as_bad ("attempt to set value of section symbol");
3706 exp.X_add_number = 0;
3709 S_SET_SEGMENT (symbolP, absolute_section);
3710 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3711 set_zero_frag (symbolP);
3715 #ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
3716 if (S_IS_EXTERNAL (symbolP))
3718 as_bad ("can't equate global symbol `%s' with register name",
3719 S_GET_NAME (symbolP));
3723 S_SET_SEGMENT (symbolP, reg_section);
3724 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3725 set_zero_frag (symbolP);
3726 symbol_get_value_expression (symbolP)->X_op = O_register;
3730 seg = S_GET_SEGMENT (exp.X_add_symbol);
3731 /* For x=undef+const, create an expression symbol.
3732 For x=x+const, just update x except when x is an undefined symbol
3733 For x=defined+const, evaluate x. */
3734 if (symbolP == exp.X_add_symbol
3735 && (seg != undefined_section
3736 || !symbol_constant_p (symbolP)))
3738 *symbol_X_add_number (symbolP) += exp.X_add_number;
3741 else if (!S_IS_FORWARD_REF (symbolP) && seg != undefined_section)
3743 symbolS *s = exp.X_add_symbol;
3745 if (S_IS_COMMON (s))
3746 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3747 S_GET_NAME (symbolP), S_GET_NAME (s));
3749 S_SET_SEGMENT (symbolP, seg);
3750 S_SET_VALUE (symbolP, exp.X_add_number + S_GET_VALUE (s));
3751 symbol_set_frag (symbolP, symbol_get_frag (s));
3752 copy_symbol_attributes (symbolP, s);
3755 S_SET_SEGMENT (symbolP, undefined_section);
3756 symbol_set_value_expression (symbolP, &exp);
3757 copy_symbol_attributes (symbolP, exp.X_add_symbol);
3758 set_zero_frag (symbolP);
3762 /* The value is some complex expression. */
3763 S_SET_SEGMENT (symbolP, expr_section);
3764 symbol_set_value_expression (symbolP, &exp);
3765 set_zero_frag (symbolP);
3772 CONStruct more frag of .bytes, or .words etc.
3773 Should need_pass_2 be 1 then emit no frag(s).
3774 This understands EXPRESSIONS.
3778 This has a split personality. We use expression() to read the
3779 value. We can detect if the value won't fit in a byte or word.
3780 But we can't detect if expression() discarded significant digits
3781 in the case of a long. Not worth the crocks required to fix it. */
3783 /* Select a parser for cons expressions. */
3785 /* Some targets need to parse the expression in various fancy ways.
3786 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3787 (for example, the HPPA does this). Otherwise, you can define
3788 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3789 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3790 are defined, which is the normal case, then only simple expressions
3795 parse_mri_cons (expressionS *exp, unsigned int nbytes);
3798 #ifndef TC_PARSE_CONS_EXPRESSION
3799 #ifdef BITFIELD_CONS_EXPRESSIONS
3800 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3802 parse_bitfield_cons (expressionS *exp, unsigned int nbytes);
3804 #ifdef REPEAT_CONS_EXPRESSIONS
3805 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3807 parse_repeat_cons (expressionS *exp, unsigned int nbytes);
3810 /* If we haven't gotten one yet, just call expression. */
3811 #ifndef TC_PARSE_CONS_EXPRESSION
3812 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3817 do_parse_cons_expression (expressionS *exp,
3818 int nbytes ATTRIBUTE_UNUSED)
3820 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3824 /* Worker to do .byte etc statements.
3825 Clobbers input_line_pointer and checks end-of-line. */
3828 cons_worker (int nbytes, /* 1=.byte, 2=.word, 4=.long. */
3836 #ifdef md_flush_pending_output
3837 md_flush_pending_output ();
3841 stop = mri_comment_field (&stopc);
3843 if (is_it_end_of_statement ())
3845 demand_empty_rest_of_line ();
3847 mri_comment_end (stop, stopc);
3851 #ifdef TC_ADDRESS_BYTES
3853 nbytes = TC_ADDRESS_BYTES ();
3856 #ifdef md_cons_align
3857 md_cons_align (nbytes);
3865 parse_mri_cons (&exp, (unsigned int) nbytes);
3868 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3872 if (exp.X_op == O_symbol)
3873 exp.X_op = O_symbol_rva;
3875 as_fatal (_("rva without symbol"));
3877 emit_expr (&exp, (unsigned int) nbytes);
3880 while (*input_line_pointer++ == ',');
3882 /* In MRI mode, after an odd number of bytes, we must align to an
3883 even word boundary, unless the next instruction is a dc.b, ds.b
3885 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3886 mri_pending_align = 1;
3888 input_line_pointer--; /* Put terminator back into stream. */
3890 demand_empty_rest_of_line ();
3893 mri_comment_end (stop, stopc);
3899 cons_worker (size, 0);
3905 cons_worker (size, 1);
3908 /* .reloc offset, reloc_name, symbol+addend. */
3911 s_reloc (int ignore ATTRIBUTE_UNUSED)
3918 struct reloc_list *reloc;
3920 reloc = (struct reloc_list *) xmalloc (sizeof (*reloc));
3923 stop = mri_comment_field (&stopc);
3932 as_bad (_("missing or bad offset expression"));
3935 exp.X_add_symbol = section_symbol (now_seg);
3936 exp.X_op = O_symbol;
3939 if (exp.X_add_number == 0)
3941 reloc->u.a.offset_sym = exp.X_add_symbol;
3946 reloc->u.a.offset_sym = make_expr_symbol (&exp);
3951 if (*input_line_pointer != ',')
3953 as_bad (_("missing reloc type"));
3957 ++input_line_pointer;
3959 r_name = input_line_pointer;
3960 c = get_symbol_end ();
3961 reloc->u.a.howto = bfd_reloc_name_lookup (stdoutput, r_name);
3962 *input_line_pointer = c;
3963 if (reloc->u.a.howto == NULL)
3965 as_bad (_("unrecognized reloc type"));
3969 exp.X_op = O_absent;
3971 if (*input_line_pointer == ',')
3973 ++input_line_pointer;
3981 as_bad (_("bad reloc expression"));
3983 ignore_rest_of_line ();
3986 mri_comment_end (stop, stopc);
3989 reloc->u.a.sym = NULL;
3990 reloc->u.a.addend = 0;
3993 reloc->u.a.sym = NULL;
3994 reloc->u.a.addend = exp.X_add_number;
3997 reloc->u.a.sym = exp.X_add_symbol;
3998 reloc->u.a.addend = exp.X_add_number;
4001 reloc->u.a.sym = make_expr_symbol (&exp);
4002 reloc->u.a.addend = 0;
4006 as_where (&reloc->file, &reloc->line);
4007 reloc->next = reloc_list;
4010 demand_empty_rest_of_line ();
4012 mri_comment_end (stop, stopc);
4015 /* Put the contents of expression EXP into the object file using
4016 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
4019 emit_expr (expressionS *exp, unsigned int nbytes)
4023 valueT extra_digit = 0;
4025 /* Don't do anything if we are going to make another pass. */
4029 /* Grow the current frag now so that dot_value does not get invalidated
4030 if the frag were to fill up in the frag_more() call below. */
4032 dot_value = frag_now_fix ();
4036 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
4037 appear as a four byte positive constant in the .line section,
4038 followed by a 2 byte 0xffff. Look for that case here. */
4040 static int dwarf_line = -1;
4042 if (strcmp (segment_name (now_seg), ".line") != 0)
4044 else if (dwarf_line >= 0
4046 && exp->X_op == O_constant
4047 && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
4048 listing_source_line ((unsigned int) dwarf_line);
4049 else if (nbytes == 4
4050 && exp->X_op == O_constant
4051 && exp->X_add_number >= 0)
4052 dwarf_line = exp->X_add_number;
4057 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
4058 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
4059 AT_sibling (0x12) followed by a four byte address of the sibling
4060 followed by a 2 byte AT_name (0x38) followed by the name of the
4061 file. We look for that case here. */
4063 static int dwarf_file = 0;
4065 if (strcmp (segment_name (now_seg), ".debug") != 0)
4067 else if (dwarf_file == 0
4069 && exp->X_op == O_constant
4070 && exp->X_add_number == 0x11)
4072 else if (dwarf_file == 1
4074 && exp->X_op == O_constant
4075 && exp->X_add_number == 0x12)
4077 else if (dwarf_file == 2
4080 else if (dwarf_file == 3
4082 && exp->X_op == O_constant
4083 && exp->X_add_number == 0x38)
4088 /* The variable dwarf_file_string tells stringer that the string
4089 may be the name of the source file. */
4090 if (dwarf_file == 4)
4091 dwarf_file_string = 1;
4093 dwarf_file_string = 0;
4098 if (check_eh_frame (exp, &nbytes))
4103 /* Allow `.word 0' in the absolute section. */
4104 if (now_seg == absolute_section)
4106 if (op != O_constant || exp->X_add_number != 0)
4107 as_bad (_("attempt to store value in absolute section"));
4108 abs_section_offset += nbytes;
4112 /* Handle a negative bignum. */
4114 && exp->X_add_number == 0
4115 && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
4116 && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
4119 unsigned long carry;
4121 exp = symbol_get_value_expression (exp->X_add_symbol);
4123 /* Negate the bignum: one's complement each digit and add 1. */
4125 for (i = 0; i < exp->X_add_number; i++)
4129 next = (((~(generic_bignum[i] & LITTLENUM_MASK))
4132 generic_bignum[i] = next & LITTLENUM_MASK;
4133 carry = next >> LITTLENUM_NUMBER_OF_BITS;
4136 /* We can ignore any carry out, because it will be handled by
4137 extra_digit if it is needed. */
4139 extra_digit = (valueT) -1;
4143 if (op == O_absent || op == O_illegal)
4145 as_warn (_("zero assumed for missing expression"));
4146 exp->X_add_number = 0;
4149 else if (op == O_big && exp->X_add_number <= 0)
4151 as_bad (_("floating point number invalid"));
4152 exp->X_add_number = 0;
4155 else if (op == O_register)
4157 as_warn (_("register value used as expression"));
4161 p = frag_more ((int) nbytes);
4163 #ifndef WORKING_DOT_WORD
4164 /* If we have the difference of two symbols in a word, save it on
4165 the broken_words list. See the code in write.c. */
4166 if (op == O_subtract && nbytes == 2)
4168 struct broken_word *x;
4170 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
4171 x->next_broken_word = broken_words;
4174 x->subseg = now_subseg;
4176 x->word_goes_here = p;
4178 x->add = exp->X_add_symbol;
4179 x->sub = exp->X_op_symbol;
4180 x->addnum = exp->X_add_number;
4188 /* If we have an integer, but the number of bytes is too large to
4189 pass to md_number_to_chars, handle it as a bignum. */
4190 if (op == O_constant && nbytes > sizeof (valueT))
4192 extra_digit = exp->X_unsigned ? 0 : -1;
4193 convert_to_bignum (exp);
4197 if (op == O_constant)
4205 /* JF << of >= number of bits in the object is undefined. In
4206 particular SPARC (Sun 4) has problems. */
4207 if (nbytes >= sizeof (valueT))
4210 if (nbytes > sizeof (valueT))
4213 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
4217 /* Don't store these bits. */
4218 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
4219 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
4222 unmask = ~mask; /* Do store these bits. */
4225 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
4226 mask = ~(unmask >> 1); /* Includes sign bit now. */
4229 get = exp->X_add_number;
4231 if ((get & mask) != 0
4232 && ((get & mask) != mask
4233 || (get & hibit) == 0))
4234 { /* Leading bits contain both 0s & 1s. */
4235 #if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG
4237 as_warn (_("value 0x%llx truncated to 0x%llx"),
4238 (unsigned long long) get, (unsigned long long) use);
4240 as_warn (_("value 0x%I64x truncated to 0x%I64x"),
4241 (unsigned long long) get, (unsigned long long) use);
4244 as_warn (_("value 0x%lx truncated to 0x%lx"),
4245 (unsigned long) get, (unsigned long) use);
4248 /* Put bytes in right order. */
4249 md_number_to_chars (p, use, (int) nbytes);
4251 else if (op == O_big)
4254 LITTLENUM_TYPE *nums;
4256 know (nbytes % CHARS_PER_LITTLENUM == 0);
4258 size = exp->X_add_number * CHARS_PER_LITTLENUM;
4261 as_warn (_("bignum truncated to %d bytes"), nbytes);
4265 if (target_big_endian)
4267 while (nbytes > size)
4269 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
4270 nbytes -= CHARS_PER_LITTLENUM;
4271 p += CHARS_PER_LITTLENUM;
4274 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
4275 while (size >= CHARS_PER_LITTLENUM)
4278 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
4279 size -= CHARS_PER_LITTLENUM;
4280 p += CHARS_PER_LITTLENUM;
4285 nums = generic_bignum;
4286 while (size >= CHARS_PER_LITTLENUM)
4288 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
4290 size -= CHARS_PER_LITTLENUM;
4291 p += CHARS_PER_LITTLENUM;
4292 nbytes -= CHARS_PER_LITTLENUM;
4295 while (nbytes >= CHARS_PER_LITTLENUM)
4297 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
4298 nbytes -= CHARS_PER_LITTLENUM;
4299 p += CHARS_PER_LITTLENUM;
4304 emit_expr_fix (exp, nbytes, frag_now, p);
4308 emit_expr_fix (expressionS *exp, unsigned int nbytes, fragS *frag, char *p)
4310 memset (p, 0, nbytes);
4312 /* Generate a fixS to record the symbol value. */
4314 #ifdef TC_CONS_FIX_NEW
4315 TC_CONS_FIX_NEW (frag, p - frag->fr_literal, nbytes, exp);
4318 bfd_reloc_code_real_type r;
4338 as_bad (_("unsupported BFD relocation size %u"), nbytes);
4342 fix_new_exp (frag, p - frag->fr_literal, (int) nbytes, exp,
4348 #ifdef BITFIELD_CONS_EXPRESSIONS
4350 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
4351 w:x,y:z, where w and y are bitwidths and x and y are values. They
4352 then pack them all together. We do a little better in that we allow
4353 them in words, longs, etc. and we'll pack them in target byte order
4356 The rules are: pack least significant bit first, if a field doesn't
4357 entirely fit, put it in the next unit. Overflowing the bitfield is
4358 explicitly *not* even a warning. The bitwidth should be considered
4361 To use this function the tc-XXX.h file should define
4362 BITFIELD_CONS_EXPRESSIONS. */
4365 parse_bitfield_cons (exp, nbytes)
4367 unsigned int nbytes;
4369 unsigned int bits_available = BITS_PER_CHAR * nbytes;
4370 char *hold = input_line_pointer;
4372 (void) expression (exp);
4374 if (*input_line_pointer == ':')
4381 unsigned long width;
4383 if (*input_line_pointer != ':')
4385 input_line_pointer = hold;
4387 } /* Next piece is not a bitfield. */
4389 /* In the general case, we can't allow
4390 full expressions with symbol
4391 differences and such. The relocation
4392 entries for symbols not defined in this
4393 assembly would require arbitrary field
4394 widths, positions, and masks which most
4395 of our current object formats don't
4398 In the specific case where a symbol
4399 *is* defined in this assembly, we
4400 *could* build fixups and track it, but
4401 this could lead to confusion for the
4402 backends. I'm lazy. I'll take any
4403 SEG_ABSOLUTE. I think that means that
4404 you can use a previous .set or
4405 .equ type symbol. xoxorich. */
4407 if (exp->X_op == O_absent)
4409 as_warn (_("using a bit field width of zero"));
4410 exp->X_add_number = 0;
4411 exp->X_op = O_constant;
4412 } /* Implied zero width bitfield. */
4414 if (exp->X_op != O_constant)
4416 *input_line_pointer = '\0';
4417 as_bad (_("field width \"%s\" too complex for a bitfield"), hold);
4418 *input_line_pointer = ':';
4419 demand_empty_rest_of_line ();
4421 } /* Too complex. */
4423 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
4425 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4426 width, nbytes, (BITS_PER_CHAR * nbytes));
4427 width = BITS_PER_CHAR * nbytes;
4430 if (width > bits_available)
4432 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4433 input_line_pointer = hold;
4434 exp->X_add_number = value;
4439 hold = ++input_line_pointer;
4441 (void) expression (exp);
4442 if (exp->X_op != O_constant)
4444 char cache = *input_line_pointer;
4446 *input_line_pointer = '\0';
4447 as_bad (_("field value \"%s\" too complex for a bitfield"), hold);
4448 *input_line_pointer = cache;
4449 demand_empty_rest_of_line ();
4451 } /* Too complex. */
4453 value |= ((~(-1 << width) & exp->X_add_number)
4454 << ((BITS_PER_CHAR * nbytes) - bits_available));
4456 if ((bits_available -= width) == 0
4457 || is_it_end_of_statement ()
4458 || *input_line_pointer != ',')
4461 } /* All the bitfields we're gonna get. */
4463 hold = ++input_line_pointer;
4464 (void) expression (exp);
4467 exp->X_add_number = value;
4468 exp->X_op = O_constant;
4469 exp->X_unsigned = 1;
4473 #endif /* BITFIELD_CONS_EXPRESSIONS */
4475 /* Handle an MRI style string expression. */
4479 parse_mri_cons (exp, nbytes)
4481 unsigned int nbytes;
4483 if (*input_line_pointer != '\''
4484 && (input_line_pointer[1] != '\''
4485 || (*input_line_pointer != 'A'
4486 && *input_line_pointer != 'E')))
4487 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
4491 unsigned int result = 0;
4493 /* An MRI style string. Cut into as many bytes as will fit into
4494 a nbyte chunk, left justify if necessary, and separate with
4495 commas so we can try again later. */
4496 if (*input_line_pointer == 'A')
4497 ++input_line_pointer;
4498 else if (*input_line_pointer == 'E')
4500 as_bad (_("EBCDIC constants are not supported"));
4501 ++input_line_pointer;
4504 input_line_pointer++;
4505 for (scan = 0; scan < nbytes; scan++)
4507 if (*input_line_pointer == '\'')
4509 if (input_line_pointer[1] == '\'')
4511 input_line_pointer++;
4516 result = (result << 8) | (*input_line_pointer++);
4520 while (scan < nbytes)
4526 /* Create correct expression. */
4527 exp->X_op = O_constant;
4528 exp->X_add_number = result;
4530 /* Fake it so that we can read the next char too. */
4531 if (input_line_pointer[0] != '\'' ||
4532 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
4534 input_line_pointer -= 2;
4535 input_line_pointer[0] = ',';
4536 input_line_pointer[1] = '\'';
4539 input_line_pointer++;
4542 #endif /* TC_M68K */
4544 #ifdef REPEAT_CONS_EXPRESSIONS
4546 /* Parse a repeat expression for cons. This is used by the MIPS
4547 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4548 object file COUNT times.
4550 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4553 parse_repeat_cons (exp, nbytes)
4555 unsigned int nbytes;
4562 if (*input_line_pointer != ':')
4564 /* No repeat count. */
4568 ++input_line_pointer;
4569 expression (&count);
4570 if (count.X_op != O_constant
4571 || count.X_add_number <= 0)
4573 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4577 /* The cons function is going to output this expression once. So we
4578 output it count - 1 times. */
4579 for (i = count.X_add_number - 1; i > 0; i--)
4580 emit_expr (exp, nbytes);
4583 #endif /* REPEAT_CONS_EXPRESSIONS */
4585 /* Parse a floating point number represented as a hex constant. This
4586 permits users to specify the exact bits they want in the floating
4590 hex_float (int float_type, char *bytes)
4622 as_bad (_("unknown floating type type '%c'"), float_type);
4626 /* It would be nice if we could go through expression to parse the
4627 hex constant, but if we get a bignum it's a pain to sort it into
4628 the buffer correctly. */
4630 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
4634 /* The MRI assembler accepts arbitrary underscores strewn about
4635 through the hex constant, so we ignore them as well. */
4636 if (*input_line_pointer == '_')
4638 ++input_line_pointer;
4644 as_warn (_("floating point constant too large"));
4647 d = hex_value (*input_line_pointer) << 4;
4648 ++input_line_pointer;
4649 while (*input_line_pointer == '_')
4650 ++input_line_pointer;
4651 if (hex_p (*input_line_pointer))
4653 d += hex_value (*input_line_pointer);
4654 ++input_line_pointer;
4656 if (target_big_endian)
4659 bytes[length - i - 1] = d;
4665 if (target_big_endian)
4666 memset (bytes + i, 0, length - i);
4668 memset (bytes, 0, length - i);
4676 CONStruct some more frag chars of .floats .ffloats etc.
4677 Makes 0 or more new frags.
4678 If need_pass_2 == 1, no frags are emitted.
4679 This understands only floating literals, not expressions. Sorry.
4681 A floating constant is defined by atof_generic(), except it is preceded
4682 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4683 reading, I decided to be incompatible. This always tries to give you
4684 rounded bits to the precision of the pseudo-op. Former AS did premature
4685 truncation, restored noisy bits instead of trailing 0s AND gave you
4686 a choice of 2 flavours of noise according to which of 2 floating-point
4687 scanners you directed AS to use.
4689 In: input_line_pointer->whitespace before, or '0' of flonum. */
4692 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4693 int float_type /* 'f':.ffloat ... 'F':.float ... */)
4696 int length; /* Number of chars in an object. */
4697 char *err; /* Error from scanning floating literal. */
4698 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
4700 if (is_it_end_of_statement ())
4702 demand_empty_rest_of_line ();
4706 #ifdef md_flush_pending_output
4707 md_flush_pending_output ();
4710 #ifdef md_cons_align
4716 /* input_line_pointer->1st char of a flonum (we hope!). */
4719 /* Skip any 0{letter} that may be present. Don't even check if the
4720 letter is legal. Someone may invent a "z" format and this routine
4721 has no use for such information. Lusers beware: you get
4722 diagnostics if your input is ill-conditioned. */
4723 if (input_line_pointer[0] == '0'
4724 && ISALPHA (input_line_pointer[1]))
4725 input_line_pointer += 2;
4727 /* Accept :xxxx, where the x's are hex digits, for a floating
4728 point with the exact digits specified. */
4729 if (input_line_pointer[0] == ':')
4731 ++input_line_pointer;
4732 length = hex_float (float_type, temp);
4735 ignore_rest_of_line ();
4741 err = md_atof (float_type, temp, &length);
4742 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
4743 know (err != NULL || length > 0);
4746 as_bad (_("bad floating literal: %s"), err);
4747 ignore_rest_of_line ();
4758 #ifdef REPEAT_CONS_EXPRESSIONS
4759 if (*input_line_pointer == ':')
4761 expressionS count_exp;
4763 ++input_line_pointer;
4764 expression (&count_exp);
4766 if (count_exp.X_op != O_constant
4767 || count_exp.X_add_number <= 0)
4768 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4770 count = count_exp.X_add_number;
4774 while (--count >= 0)
4776 p = frag_more (length);
4777 memcpy (p, temp, (unsigned int) length);
4782 while (*input_line_pointer++ == ',');
4784 /* Put terminator back into stream. */
4785 --input_line_pointer;
4786 demand_empty_rest_of_line ();
4789 /* Return the size of a LEB128 value. */
4792 sizeof_sleb128 (offsetT value)
4799 byte = (value & 0x7f);
4800 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4801 Fortunately, we can structure things so that the extra work reduces
4802 to a noop on systems that do things "properly". */
4803 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4806 while (!(((value == 0) && ((byte & 0x40) == 0))
4807 || ((value == -1) && ((byte & 0x40) != 0))));
4813 sizeof_uleb128 (valueT value)
4828 sizeof_leb128 (valueT value, int sign)
4831 return sizeof_sleb128 ((offsetT) value);
4833 return sizeof_uleb128 (value);
4836 /* Output a LEB128 value. */
4839 output_sleb128 (char *p, offsetT value)
4846 unsigned byte = (value & 0x7f);
4848 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4849 Fortunately, we can structure things so that the extra work reduces
4850 to a noop on systems that do things "properly". */
4851 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4853 more = !((((value == 0) && ((byte & 0x40) == 0))
4854 || ((value == -1) && ((byte & 0x40) != 0))));
4866 output_uleb128 (char *p, valueT value)
4872 unsigned byte = (value & 0x7f);
4875 /* More bytes to follow. */
4886 output_leb128 (char *p, valueT value, int sign)
4889 return output_sleb128 (p, (offsetT) value);
4891 return output_uleb128 (p, value);
4894 /* Do the same for bignums. We combine sizeof with output here in that
4895 we don't output for NULL values of P. It isn't really as critical as
4896 for "normal" values that this be streamlined. */
4899 output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
4906 /* Strip leading sign extensions off the bignum. */
4908 && bignum[size - 1] == LITTLENUM_MASK
4909 && bignum[size - 2] > LITTLENUM_MASK / 2)
4914 /* OR in the next part of the littlenum. */
4915 val |= (*bignum << loaded);
4916 loaded += LITTLENUM_NUMBER_OF_BITS;
4920 /* Add bytes until there are less than 7 bits left in VAL
4921 or until every non-sign bit has been written. */
4928 || val != ((byte & 0x40) == 0 ? 0 : ((valueT) 1 << loaded) - 1))
4935 while ((byte & 0x80) != 0 && loaded >= 7);
4939 /* Mop up any left-over bits (of which there will be less than 7). */
4940 if ((byte & 0x80) != 0)
4942 /* Sign-extend VAL. */
4943 if (val & (1 << (loaded - 1)))
4944 val |= ~0 << loaded;
4954 output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
4961 /* Strip leading zeros off the bignum. */
4962 /* XXX: Is this needed? */
4963 while (size > 0 && bignum[size - 1] == 0)
4968 if (loaded < 7 && size > 0)
4970 val |= (*bignum << loaded);
4971 loaded += 8 * CHARS_PER_LITTLENUM;
4980 if (size > 0 || val)
4987 while (byte & 0x80);
4993 output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, int size, int sign)
4996 return output_big_sleb128 (p, bignum, size);
4998 return output_big_uleb128 (p, bignum, size);
5001 /* Generate the appropriate fragments for a given expression to emit a
5005 emit_leb128_expr (expressionS *exp, int sign)
5007 operatorT op = exp->X_op;
5008 unsigned int nbytes;
5010 if (op == O_absent || op == O_illegal)
5012 as_warn (_("zero assumed for missing expression"));
5013 exp->X_add_number = 0;
5016 else if (op == O_big && exp->X_add_number <= 0)
5018 as_bad (_("floating point number invalid"));
5019 exp->X_add_number = 0;
5022 else if (op == O_register)
5024 as_warn (_("register value used as expression"));
5027 else if (op == O_constant
5029 && (exp->X_add_number < 0) != !exp->X_unsigned)
5031 /* We're outputting a signed leb128 and the sign of X_add_number
5032 doesn't reflect the sign of the original value. Convert EXP
5033 to a correctly-extended bignum instead. */
5034 convert_to_bignum (exp);
5038 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
5039 a signal that this is leb128 data. It shouldn't optimize this away. */
5040 nbytes = (unsigned int) -1;
5041 if (check_eh_frame (exp, &nbytes))
5044 /* Let the backend know that subsequent data may be byte aligned. */
5045 #ifdef md_cons_align
5049 if (op == O_constant)
5051 /* If we've got a constant, emit the thing directly right now. */
5053 valueT value = exp->X_add_number;
5057 size = sizeof_leb128 (value, sign);
5058 p = frag_more (size);
5059 output_leb128 (p, value, sign);
5061 else if (op == O_big)
5063 /* O_big is a different sort of constant. */
5068 size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
5069 p = frag_more (size);
5070 output_big_leb128 (p, generic_bignum, exp->X_add_number, sign);
5074 /* Otherwise, we have to create a variable sized fragment and
5075 resolve things later. */
5077 frag_var (rs_leb128, sizeof_uleb128 (~(valueT) 0), 0, sign,
5078 make_expr_symbol (exp), 0, (char *) NULL);
5082 /* Parse the .sleb128 and .uleb128 pseudos. */
5089 #ifdef md_flush_pending_output
5090 md_flush_pending_output ();
5096 emit_leb128_expr (&exp, sign);
5098 while (*input_line_pointer++ == ',');
5100 input_line_pointer--;
5101 demand_empty_rest_of_line ();
5105 stringer_append_char (int c, int bitsize)
5107 if (!target_big_endian)
5108 FRAG_APPEND_1_CHAR (c);
5113 FRAG_APPEND_1_CHAR (0);
5114 FRAG_APPEND_1_CHAR (0);
5115 FRAG_APPEND_1_CHAR (0);
5116 FRAG_APPEND_1_CHAR (0);
5119 FRAG_APPEND_1_CHAR (0);
5120 FRAG_APPEND_1_CHAR (0);
5123 FRAG_APPEND_1_CHAR (0);
5128 /* Called with invalid bitsize argument. */
5132 if (target_big_endian)
5133 FRAG_APPEND_1_CHAR (c);
5136 /* Worker to do .ascii etc statements.
5137 Reads 0 or more ',' separated, double-quoted strings.
5138 Caller should have checked need_pass_2 is FALSE because we don't
5140 Checks for end-of-line.
5141 BITS_APPENDZERO says how many bits are in a target char.
5142 The bottom bit is set if a NUL char should be appended to the strings. */
5145 stringer (int bits_appendzero)
5147 const int bitsize = bits_appendzero & ~7;
5148 const int append_zero = bits_appendzero & 1;
5152 #ifdef md_flush_pending_output
5153 md_flush_pending_output ();
5156 #ifdef md_cons_align
5160 /* The following awkward logic is to parse ZERO or more strings,
5161 comma separated. Recall a string expression includes spaces
5162 before the opening '\"' and spaces after the closing '\"'.
5163 We fake a leading ',' if there is (supposed to be)
5164 a 1st, expression. We keep demanding expressions for each ','. */
5165 if (is_it_end_of_statement ())
5167 c = 0; /* Skip loop. */
5168 ++input_line_pointer; /* Compensate for end of loop. */
5172 c = ','; /* Do loop. */
5174 /* If we have been switched into the abs_section then we
5175 will not have an obstack onto which we can hang strings. */
5176 if (now_seg == absolute_section)
5178 as_bad (_("strings must be placed into a section"));
5180 ignore_rest_of_line ();
5183 while (c == ',' || c == '<' || c == '"')
5186 switch (*input_line_pointer)
5189 ++input_line_pointer; /*->1st char of string. */
5190 start = input_line_pointer;
5192 while (is_a_char (c = next_char_of_string ()))
5193 stringer_append_char (c, bitsize);
5196 stringer_append_char (0, bitsize);
5198 know (input_line_pointer[-1] == '\"');
5202 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
5203 will emit .string with a filename in the .debug section
5204 after a sequence of constants. See the comment in
5205 emit_expr for the sequence. emit_expr will set
5206 dwarf_file_string to non-zero if this string might be a
5207 source file name. */
5208 if (strcmp (segment_name (now_seg), ".debug") != 0)
5209 dwarf_file_string = 0;
5210 else if (dwarf_file_string)
5212 c = input_line_pointer[-1];
5213 input_line_pointer[-1] = '\0';
5214 listing_source_file (start);
5215 input_line_pointer[-1] = c;
5222 input_line_pointer++;
5223 c = get_single_number ();
5224 stringer_append_char (c, bitsize);
5225 if (*input_line_pointer != '>')
5226 as_bad (_("expected <nn>"));
5228 input_line_pointer++;
5231 input_line_pointer++;
5235 c = *input_line_pointer;
5238 demand_empty_rest_of_line ();
5241 /* FIXME-SOMEDAY: I had trouble here on characters with the
5242 high bits set. We'll probably also have trouble with
5243 multibyte chars, wide chars, etc. Also be careful about
5244 returning values bigger than 1 byte. xoxorich. */
5247 next_char_of_string (void)
5251 c = *input_line_pointer++ & CHAR_MASK;
5259 as_warn (_("unterminated string; newline inserted"));
5260 bump_line_counters ();
5263 #ifndef NO_STRING_ESCAPES
5265 switch (c = *input_line_pointer++)
5293 break; /* As itself. */
5309 for (i = 0, number = 0;
5310 ISDIGIT (c) && i < 3;
5311 c = *input_line_pointer++, i++)
5313 number = number * 8 + c - '0';
5318 --input_line_pointer;
5327 c = *input_line_pointer++;
5328 while (ISXDIGIT (c))
5331 number = number * 16 + c - '0';
5332 else if (ISUPPER (c))
5333 number = number * 16 + c - 'A' + 10;
5335 number = number * 16 + c - 'a' + 10;
5336 c = *input_line_pointer++;
5339 --input_line_pointer;
5344 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
5345 as_warn (_("unterminated string; newline inserted"));
5347 bump_line_counters ();
5352 #ifdef ONLY_STANDARD_ESCAPES
5353 as_bad (_("bad escaped character in string"));
5355 #endif /* ONLY_STANDARD_ESCAPES */
5360 #endif /* ! defined (NO_STRING_ESCAPES) */
5369 get_segmented_expression (expressionS *expP)
5373 retval = expression (expP);
5374 if (expP->X_op == O_illegal
5375 || expP->X_op == O_absent
5376 || expP->X_op == O_big)
5378 as_bad (_("expected address expression"));
5379 expP->X_op = O_constant;
5380 expP->X_add_number = 0;
5381 retval = absolute_section;
5387 get_known_segmented_expression (expressionS *expP)
5391 if ((retval = get_segmented_expression (expP)) == undefined_section)
5393 /* There is no easy way to extract the undefined symbol from the
5395 if (expP->X_add_symbol != NULL
5396 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
5397 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5398 S_GET_NAME (expP->X_add_symbol));
5400 as_warn (_("some symbol undefined; zero assumed"));
5401 retval = absolute_section;
5402 expP->X_op = O_constant;
5403 expP->X_add_number = 0;
5405 know (retval == absolute_section || SEG_NORMAL (retval));
5409 char /* Return terminator. */
5410 get_absolute_expression_and_terminator (long *val_pointer /* Return value of expression. */)
5412 /* FIXME: val_pointer should probably be offsetT *. */
5413 *val_pointer = (long) get_absolute_expression ();
5414 return (*input_line_pointer++);
5417 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
5418 Give a warning if that happens. */
5421 demand_copy_C_string (int *len_pointer)
5425 if ((s = demand_copy_string (len_pointer)) != 0)
5429 for (len = *len_pointer; len > 0; len--)
5436 as_bad (_("this string may not contain \'\\0\'"));
5444 /* Demand string, but return a safe (=private) copy of the string.
5445 Return NULL if we can't read a string here. */
5448 demand_copy_string (int *lenP)
5456 if (*input_line_pointer == '\"')
5458 input_line_pointer++; /* Skip opening quote. */
5460 while (is_a_char (c = next_char_of_string ()))
5462 obstack_1grow (¬es, c);
5465 /* JF this next line is so demand_copy_C_string will return a
5466 null terminated string. */
5467 obstack_1grow (¬es, '\0');
5468 retval = (char *) obstack_finish (¬es);
5472 as_bad (_("missing string"));
5474 ignore_rest_of_line ();
5480 /* In: Input_line_pointer->next character.
5482 Do: Skip input_line_pointer over all whitespace.
5484 Out: 1 if input_line_pointer->end-of-line. */
5487 is_it_end_of_statement (void)
5490 return (is_end_of_line[(unsigned char) *input_line_pointer]);
5494 equals (char *sym_name, int reassign)
5499 input_line_pointer++;
5500 if (*input_line_pointer == '=')
5501 input_line_pointer++;
5502 if (reassign < 0 && *input_line_pointer == '=')
5503 input_line_pointer++;
5505 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
5506 input_line_pointer++;
5509 stop = mri_comment_field (&stopc);
5511 assign_symbol (sym_name, reassign >= 0 ? !reassign : reassign);
5515 demand_empty_rest_of_line ();
5516 mri_comment_end (stop, stopc);
5520 /* .incbin -- include a file verbatim at the current location. */
5523 s_incbin (int x ATTRIBUTE_UNUSED)
5534 #ifdef md_flush_pending_output
5535 md_flush_pending_output ();
5538 #ifdef md_cons_align
5543 filename = demand_copy_string (& len);
5544 if (filename == NULL)
5549 /* Look for optional skip and count. */
5550 if (* input_line_pointer == ',')
5552 ++ input_line_pointer;
5553 skip = get_absolute_expression ();
5557 if (* input_line_pointer == ',')
5559 ++ input_line_pointer;
5561 count = get_absolute_expression ();
5563 as_warn (_(".incbin count zero, ignoring `%s'"), filename);
5569 demand_empty_rest_of_line ();
5571 /* Try opening absolute path first, then try include dirs. */
5572 binfile = fopen (filename, FOPEN_RB);
5573 if (binfile == NULL)
5577 path = (char *) xmalloc ((unsigned long) len + include_dir_maxlen + 5);
5579 for (i = 0; i < include_dir_count; i++)
5581 sprintf (path, "%s/%s", include_dirs[i], filename);
5583 binfile = fopen (path, FOPEN_RB);
5584 if (binfile != NULL)
5588 if (binfile == NULL)
5589 as_bad (_("file not found: %s"), filename);
5592 path = xstrdup (filename);
5598 register_dependency (path);
5600 /* Compute the length of the file. */
5601 if (fseek (binfile, 0, SEEK_END) != 0)
5603 as_bad (_("seek to end of .incbin file failed `%s'"), path);
5606 file_len = ftell (binfile);
5608 /* If a count was not specified use the remainder of the file. */
5610 count = file_len - skip;
5612 if (skip < 0 || count < 0 || file_len < 0 || skip + count > file_len)
5614 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5615 skip, count, file_len);
5619 if (fseek (binfile, skip, SEEK_SET) != 0)
5621 as_bad (_("could not skip to %ld in file `%s'"), skip, path);
5625 /* Allocate frag space and store file contents in it. */
5626 binfrag = frag_more (count);
5628 bytes = fread (binfrag, 1, count, binfile);
5630 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5631 path, bytes, count);
5634 if (binfile != NULL)
5640 /* .include -- include a file at this point. */
5643 s_include (int arg ATTRIBUTE_UNUSED)
5652 filename = demand_copy_string (&i);
5653 if (filename == NULL)
5655 /* demand_copy_string has already printed an error and
5656 called ignore_rest_of_line. */
5664 while (!is_end_of_line[(unsigned char) *input_line_pointer]
5665 && *input_line_pointer != ' '
5666 && *input_line_pointer != '\t')
5668 obstack_1grow (¬es, *input_line_pointer);
5669 ++input_line_pointer;
5673 obstack_1grow (¬es, '\0');
5674 filename = (char *) obstack_finish (¬es);
5675 while (!is_end_of_line[(unsigned char) *input_line_pointer])
5676 ++input_line_pointer;
5679 demand_empty_rest_of_line ();
5680 path = (char *) xmalloc ((unsigned long) i
5681 + include_dir_maxlen + 5 /* slop */ );
5683 for (i = 0; i < include_dir_count; i++)
5685 strcpy (path, include_dirs[i]);
5687 strcat (path, filename);
5688 if (0 != (try_file = fopen (path, FOPEN_RT)))
5698 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5699 register_dependency (path);
5700 input_scrub_insert_file (path);
5704 add_include_dir (char *path)
5708 if (include_dir_count == 0)
5710 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
5711 include_dirs[0] = "."; /* Current dir. */
5712 include_dir_count = 2;
5716 include_dir_count++;
5718 (char **) realloc (include_dirs,
5719 include_dir_count * sizeof (*include_dirs));
5722 include_dirs[include_dir_count - 1] = path; /* New one. */
5725 if (i > include_dir_maxlen)
5726 include_dir_maxlen = i;
5729 /* Output debugging information to denote the source file. */
5732 generate_file_debug (void)
5734 if (debug_type == DEBUG_STABS)
5735 stabs_generate_asm_file ();
5738 /* Output line number debugging information for the current source line. */
5741 generate_lineno_debug (void)
5745 case DEBUG_UNSPECIFIED:
5750 stabs_generate_asm_lineno ();
5753 ecoff_generate_asm_lineno ();
5756 /* ??? We could here indicate to dwarf2dbg.c that something
5757 has changed. However, since there is additional backend
5758 support that is required (calling dwarf2_emit_insn), we
5759 let dwarf2dbg.c call as_where on its own. */
5764 /* Output debugging information to mark a function entry point or end point.
5765 END_P is zero for .func, and non-zero for .endfunc. */
5770 do_s_func (end_p, NULL);
5773 /* Subroutine of s_func so targets can choose a different default prefix.
5774 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5777 do_s_func (int end_p, const char *default_prefix)
5779 /* Record the current function so that we can issue an error message for
5780 misplaced .func,.endfunc, and also so that .endfunc needs no
5782 static char *current_name;
5783 static char *current_label;
5787 if (current_name == NULL)
5789 as_bad (_("missing .func"));
5790 ignore_rest_of_line ();
5794 if (debug_type == DEBUG_STABS)
5795 stabs_generate_asm_endfunc (current_name, current_label);
5797 current_name = current_label = NULL;
5802 char delim1, delim2;
5804 if (current_name != NULL)
5806 as_bad (_(".endfunc missing for previous .func"));
5807 ignore_rest_of_line ();
5811 name = input_line_pointer;
5812 delim1 = get_symbol_end ();
5813 name = xstrdup (name);
5814 *input_line_pointer = delim1;
5816 if (*input_line_pointer != ',')
5820 if (asprintf (&label, "%s%s", default_prefix, name) == -1)
5821 as_fatal ("%s", xstrerror (errno));
5825 char leading_char = bfd_get_symbol_leading_char (stdoutput);
5826 /* Missing entry point, use function's name with the leading
5830 if (asprintf (&label, "%c%s", leading_char, name) == -1)
5831 as_fatal ("%s", xstrerror (errno));
5839 ++input_line_pointer;
5841 label = input_line_pointer;
5842 delim2 = get_symbol_end ();
5843 label = xstrdup (label);
5844 *input_line_pointer = delim2;
5847 if (debug_type == DEBUG_STABS)
5848 stabs_generate_asm_func (name, label);
5850 current_name = name;
5851 current_label = label;
5854 demand_empty_rest_of_line ();
5858 s_ignore (int arg ATTRIBUTE_UNUSED)
5860 ignore_rest_of_line ();
5864 read_print_statistics (FILE *file)
5866 hash_print_statistics (file, "pseudo-op table", po_hash);
5869 /* Inserts the given line into the input stream.
5871 This call avoids macro/conditionals nesting checking, since the contents of
5872 the line are assumed to replace the contents of a line already scanned.
5874 An appropriate use of this function would be substitution of input lines when
5875 called by md_start_line_hook(). The given line is assumed to already be
5876 properly scrubbed. */
5879 input_scrub_insert_line (const char *line)
5883 sb_add_string (&newline, line);
5884 input_scrub_include_sb (&newline, input_line_pointer, 0);
5886 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5889 /* Insert a file into the input stream; the path must resolve to an actual
5890 file; no include path searching or dependency registering is performed. */
5893 input_scrub_insert_file (char *path)
5895 input_scrub_include_file (path, input_line_pointer);
5896 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5899 /* Find the end of a line, considering quotation and escaping of quotes. */
5901 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5902 # define TC_SINGLE_QUOTE_STRINGS 1
5906 _find_end_of_line (char *s, int mri_string, int insn ATTRIBUTE_UNUSED,
5909 char inquote = '\0';
5912 while (!is_end_of_line[(unsigned char) *s]
5913 || (inquote && !ISCNTRL (*s))
5914 || (inquote == '\'' && flag_mri)
5915 #ifdef TC_EOL_IN_INSN
5916 || (insn && TC_EOL_IN_INSN (s))
5918 /* PR 6926: When we are parsing the body of a macro the sequence
5919 \@ is special - it refers to the invocation count. If the @
5920 character happens to be registered as a line-separator character
5921 by the target, then the is_end_of_line[] test above will have
5922 returned true, but we need to ignore the line separating
5923 semantics in this particular case. */
5924 || (in_macro && inescape && *s == '@')
5927 if (mri_string && *s == '\'')
5931 else if (*s == '\\')
5935 #ifdef TC_SINGLE_QUOTE_STRINGS
5936 || (TC_SINGLE_QUOTE_STRINGS && *s == '\'')
5943 as_warn (_("missing closing `%c'"), inquote);
5945 as_warn (_("stray `\\'"));
5950 find_end_of_line (char *s, int mri_string)
5952 return _find_end_of_line (s, mri_string, 0, 0);