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 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 register 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;
686 HANDLE_CONDITIONAL_ASSEMBLY ();
688 c = get_symbol_end ();
690 /* In MRI mode, the EQU and MACRO pseudoops must
691 be handled specially. */
695 char *rest = input_line_pointer + 1;
699 if (*rest == ' ' || *rest == '\t')
701 if ((strncasecmp (rest, "EQU", 3) == 0
702 || strncasecmp (rest, "SET", 3) == 0)
703 && (rest[3] == ' ' || rest[3] == '\t'))
705 input_line_pointer = rest + 3;
707 strncasecmp (rest, "SET", 3) == 0);
710 if (strncasecmp (rest, "MACRO", 5) == 0
713 || is_end_of_line[(unsigned char) rest[5]]))
717 /* In MRI mode, we need to handle the MACRO
718 pseudo-op specially: we don't want to put the
719 symbol in the symbol table. */
721 #ifdef TC_START_LABEL_WITHOUT_COLON
722 && TC_START_LABEL_WITHOUT_COLON(c,
726 line_label = colon (line_start);
728 line_label = symbol_create (line_start,
733 *input_line_pointer = c;
735 input_line_pointer++;
740 /* We are at the beginning of a line, or similar place.
741 We expect a well-formed assembler statement.
742 A "symbol-name:" is a statement.
744 Depending on what compiler is used, the order of these tests
745 may vary to catch most common case 1st.
746 Each test is independent of all other tests at the (top)
749 c = *input_line_pointer++;
750 while (c == '\t' || c == ' ' || c == '\f');
752 /* C is the 1st significant character.
753 Input_line_pointer points after that character. */
754 if (is_name_beginner (c))
756 /* Want user-defined label or pseudo/opcode. */
757 HANDLE_CONDITIONAL_ASSEMBLY ();
759 s = --input_line_pointer;
760 c = get_symbol_end (); /* name's delimiter. */
762 /* C is character after symbol.
763 That character's place in the input line is now '\0'.
764 S points to the beginning of the symbol.
765 [In case of pseudo-op, s->'.'.]
766 Input_line_pointer->'\0' where c was. */
767 if (TC_START_LABEL (c, s, input_line_pointer))
771 char *rest = input_line_pointer + 1;
773 /* In MRI mode, \tsym: set 0 is permitted. */
777 if (*rest == ' ' || *rest == '\t')
780 if ((strncasecmp (rest, "EQU", 3) == 0
781 || strncasecmp (rest, "SET", 3) == 0)
782 && (rest[3] == ' ' || rest[3] == '\t'))
784 input_line_pointer = rest + 3;
790 line_label = colon (s); /* User-defined label. */
791 /* Put ':' back for error messages' sake. */
792 *input_line_pointer++ = ':';
793 #ifdef tc_check_label
794 tc_check_label (line_label);
796 /* Input_line_pointer->after ':'. */
799 else if ((c == '=' && input_line_pointer[1] == '=')
800 || ((c == ' ' || c == '\t')
801 && input_line_pointer[1] == '='
802 && input_line_pointer[2] == '='))
805 demand_empty_rest_of_line ();
808 || ((c == ' ' || c == '\t')
809 && input_line_pointer[1] == '='))
810 #ifdef TC_EQUAL_IN_INSN
811 && !TC_EQUAL_IN_INSN (c, s)
816 demand_empty_rest_of_line ();
820 /* Expect pseudo-op or machine instruction. */
823 #ifndef TC_CASE_SENSITIVE
827 strncpy (original_case_string, s2, sizeof (original_case_string));
828 original_case_string[sizeof (original_case_string) - 1] = 0;
837 if (NO_PSEUDO_DOT || flag_m68k_mri)
839 /* The MRI assembler uses pseudo-ops without
841 pop = (pseudo_typeS *) hash_find (po_hash, s);
842 if (pop != NULL && pop->poc_handler == NULL)
847 || (!flag_m68k_mri && *s == '.'))
851 WARNING: c has next char, which may be end-of-line.
852 We lookup the pseudo-op table with s+1 because we
853 already know that the pseudo-op begins with a '.'. */
856 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
857 if (pop && !pop->poc_handler)
860 /* In MRI mode, we may need to insert an
861 automatic alignment directive. What a hack
863 if (mri_pending_align
865 || !((pop->poc_handler == cons
866 && pop->poc_val == 1)
867 || (pop->poc_handler == s_space
868 && pop->poc_val == 1)
869 #ifdef tc_conditional_pseudoop
870 || tc_conditional_pseudoop (pop)
872 || pop->poc_handler == s_if
873 || pop->poc_handler == s_ifdef
874 || pop->poc_handler == s_ifc
875 || pop->poc_handler == s_ifeqs
876 || pop->poc_handler == s_else
877 || pop->poc_handler == s_endif
878 || pop->poc_handler == s_globl
879 || pop->poc_handler == s_ignore)))
881 do_align (1, (char *) NULL, 0, 0);
882 mri_pending_align = 0;
884 if (line_label != NULL)
886 symbol_set_frag (line_label, frag_now);
887 S_SET_VALUE (line_label, frag_now_fix ());
891 /* Print the error msg now, while we still can. */
894 char *end = input_line_pointer;
896 *input_line_pointer = c;
898 c = *--input_line_pointer;
899 *input_line_pointer = '\0';
900 if (! macro_defined || ! try_macro (c, s))
903 as_bad (_("unknown pseudo-op: `%s'"), s);
904 *input_line_pointer++ = c;
909 /* Put it back for error messages etc. */
910 *input_line_pointer = c;
911 /* The following skip of whitespace is compulsory.
912 A well shaped space is sometimes all that separates
913 keyword from operands. */
914 if (c == ' ' || c == '\t')
915 input_line_pointer++;
917 /* Input_line is restored.
918 Input_line_pointer->1st non-blank char
919 after pseudo-operation. */
920 (*pop->poc_handler) (pop->poc_val);
922 /* If that was .end, just get out now. */
923 if (pop->poc_handler == s_end)
928 /* WARNING: c has char, which may be end-of-line. */
929 /* Also: input_line_pointer->`\0` where c was. */
930 *input_line_pointer = c;
931 input_line_pointer = _find_end_of_line (input_line_pointer, flag_m68k_mri, 1, 0);
932 c = *input_line_pointer;
933 *input_line_pointer = '\0';
935 generate_lineno_debug ();
937 if (macro_defined && try_macro (c, s))
940 if (mri_pending_align)
942 do_align (1, (char *) NULL, 0, 0);
943 mri_pending_align = 0;
944 if (line_label != NULL)
946 symbol_set_frag (line_label, frag_now);
947 S_SET_VALUE (line_label, frag_now_fix ());
951 md_assemble (s); /* Assemble 1 instruction. */
953 *input_line_pointer++ = c;
955 /* We resume loop AFTER the end-of-line from
962 /* Empty statement? */
963 if (is_end_of_line[(unsigned char) c])
966 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) && ISDIGIT (c))
968 /* local label ("4:") */
969 char *backup = input_line_pointer;
971 HANDLE_CONDITIONAL_ASSEMBLY ();
975 /* Read the whole number. */
976 while (ISDIGIT (*input_line_pointer))
978 temp = (temp * 10) + *input_line_pointer - '0';
979 ++input_line_pointer;
982 if (LOCAL_LABELS_DOLLAR
983 && *input_line_pointer == '$'
984 && *(input_line_pointer + 1) == ':')
986 input_line_pointer += 2;
988 if (dollar_label_defined (temp))
990 as_fatal (_("label \"%d$\" redefined"), temp);
993 define_dollar_label (temp);
994 colon (dollar_label_name (temp, 0));
999 && *input_line_pointer++ == ':')
1001 fb_label_instance_inc (temp);
1002 colon (fb_label_name (temp, 0));
1006 input_line_pointer = backup;
1007 } /* local label ("4:") */
1009 if (c && strchr (line_comment_chars, c))
1010 { /* Its a comment. Better say APP or NO_APP. */
1015 unsigned int new_length;
1018 s = input_line_pointer;
1019 if (strncmp (s, "APP\n", 4))
1022 ignore_rest_of_line ();
1025 bump_line_counters ();
1029 ends = strstr (s, "#NO_APP\n");
1033 unsigned int tmp_len;
1036 /* The end of the #APP wasn't in this buffer. We
1037 keep reading in buffers until we find the #NO_APP
1038 that goes with this #APP There is one. The specs
1040 tmp_len = buffer_limit - s;
1041 tmp_buf = (char *) xmalloc (tmp_len + 1);
1042 memcpy (tmp_buf, s, tmp_len);
1045 new_tmp = input_scrub_next_buffer (&buffer);
1049 buffer_limit = new_tmp;
1050 input_line_pointer = buffer;
1051 ends = strstr (buffer, "#NO_APP\n");
1053 num = ends - buffer;
1055 num = buffer_limit - buffer;
1057 tmp_buf = (char *) xrealloc (tmp_buf, tmp_len + num);
1058 memcpy (tmp_buf + tmp_len, buffer, num);
1063 input_line_pointer = ends ? ends + 8 : NULL;
1071 input_line_pointer = ends + 8;
1075 scrub_string_end = ends;
1077 new_length = ends - s;
1078 new_buf = (char *) xmalloc (new_length);
1085 space = (new_buf + new_length) - new_tmp;
1086 size = do_scrub_chars (scrub_from_string, new_tmp, space);
1094 new_buf = (char *) xrealloc (new_buf, new_length + 100);
1095 new_tmp = new_buf + new_length;
1102 /* We've "scrubbed" input to the preferred format. In the
1103 process we may have consumed the whole of the remaining
1104 file (and included files). We handle this formatted
1105 input similar to that of macro expansion, letting
1106 actual macro expansion (possibly nested) and other
1107 input expansion work. Beware that in messages, line
1108 numbers and possibly file names will be incorrect. */
1109 sb_add_string (&sbuf, new_buf);
1110 input_scrub_include_sb (&sbuf, input_line_pointer, 0);
1112 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1117 HANDLE_CONDITIONAL_ASSEMBLY ();
1119 #ifdef tc_unrecognized_line
1120 if (tc_unrecognized_line (c))
1123 input_line_pointer--;
1124 /* Report unknown char as error. */
1125 demand_empty_rest_of_line ();
1128 #ifdef md_after_pass_hook
1129 md_after_pass_hook ();
1138 /* Close the input file. */
1139 input_scrub_close ();
1140 #ifdef WARN_COMMENTS
1142 if (warn_comment && found_comment)
1143 as_warn_where (found_comment_file, found_comment,
1144 "first comment found here");
1149 /* Convert O_constant expression EXP into the equivalent O_big representation.
1150 Take the sign of the number from X_unsigned rather than X_add_number. */
1153 convert_to_bignum (expressionS *exp)
1158 value = exp->X_add_number;
1159 for (i = 0; i < sizeof (exp->X_add_number) / CHARS_PER_LITTLENUM; i++)
1161 generic_bignum[i] = value & LITTLENUM_MASK;
1162 value >>= LITTLENUM_NUMBER_OF_BITS;
1164 /* Add a sequence of sign bits if the top bit of X_add_number is not
1165 the sign of the original value. */
1166 if ((exp->X_add_number < 0) != !exp->X_unsigned)
1167 generic_bignum[i++] = exp->X_unsigned ? 0 : LITTLENUM_MASK;
1169 exp->X_add_number = i;
1172 /* For most MRI pseudo-ops, the line actually ends at the first
1173 nonquoted space. This function looks for that point, stuffs a null
1174 in, and sets *STOPCP to the character that used to be there, and
1175 returns the location.
1177 Until I hear otherwise, I am going to assume that this is only true
1178 for the m68k MRI assembler. */
1181 mri_comment_field (char *stopcp)
1187 know (flag_m68k_mri);
1189 for (s = input_line_pointer;
1190 ((!is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
1198 for (s = input_line_pointer;
1199 !is_end_of_line[(unsigned char) *s];
1209 /* Skip to the end of an MRI comment field. */
1212 mri_comment_end (char *stop, int stopc)
1216 input_line_pointer = stop;
1218 while (!is_end_of_line[(unsigned char) *input_line_pointer])
1219 ++input_line_pointer;
1223 s_abort (int ignore ATTRIBUTE_UNUSED)
1225 as_fatal (_(".abort detected. Abandoning ship."));
1228 /* Guts of .align directive. N is the power of two to which to align.
1229 FILL may be NULL, or it may point to the bytes of the fill pattern.
1230 LEN is the length of whatever FILL points to, if anything. MAX is
1231 the maximum number of characters to skip when doing the alignment,
1232 or 0 if there is no maximum. */
1235 do_align (int n, char *fill, int len, int max)
1237 if (now_seg == absolute_section)
1241 if (*fill++ != '\0')
1243 as_warn (_("ignoring fill value in absolute section"));
1250 #ifdef md_flush_pending_output
1251 md_flush_pending_output ();
1254 md_do_align (n, fill, len, max, just_record_alignment);
1257 /* Only make a frag if we HAVE to... */
1258 if (n != 0 && !need_pass_2)
1262 if (subseg_text_p (now_seg))
1263 frag_align_code (n, max);
1265 frag_align (n, 0, max);
1268 frag_align (n, *fill, max);
1270 frag_align_pattern (n, fill, len, max);
1274 just_record_alignment: ATTRIBUTE_UNUSED_LABEL
1277 record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
1280 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1281 (in bytes). A negative ARG is the negative of the length of the
1282 fill pattern. BYTES_P is non-zero if the alignment value should be
1283 interpreted as the byte boundary, rather than the power of 2. */
1284 #ifndef TC_ALIGN_LIMIT
1285 #define TC_ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1289 s_align (int arg, int bytes_p)
1291 unsigned int align_limit = TC_ALIGN_LIMIT;
1300 stop = mri_comment_field (&stopc);
1302 if (is_end_of_line[(unsigned char) *input_line_pointer])
1307 align = arg; /* Default value from pseudo-op table. */
1311 align = get_absolute_expression ();
1317 /* Convert to a power of 2. */
1322 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1325 as_bad (_("alignment not a power of 2"));
1331 if (align > align_limit)
1333 align = align_limit;
1334 as_warn (_("alignment too large: %u assumed"), align);
1337 if (*input_line_pointer != ',')
1344 ++input_line_pointer;
1345 if (*input_line_pointer == ',')
1349 fill = get_absolute_expression ();
1354 if (*input_line_pointer != ',')
1358 ++input_line_pointer;
1359 max = get_absolute_expression ();
1366 as_warn (_("expected fill pattern missing"));
1367 do_align (align, (char *) NULL, 0, max);
1382 do_align (align, &fill_char, fill_len, max);
1388 if ((size_t) fill_len > sizeof ab)
1390 md_number_to_chars (ab, fill, fill_len);
1391 do_align (align, ab, fill_len, max);
1395 demand_empty_rest_of_line ();
1398 mri_comment_end (stop, stopc);
1401 /* Handle the .align pseudo-op on machines where ".align 4" means
1402 align to a 4 byte boundary. */
1405 s_align_bytes (int arg)
1410 /* Handle the .align pseudo-op on machines where ".align 4" means align
1411 to a 2**4 boundary. */
1414 s_align_ptwo (int arg)
1419 /* Switch in and out of alternate macro mode. */
1424 demand_empty_rest_of_line ();
1425 macro_set_alternate (on);
1429 s_comm_internal (int param,
1430 symbolS *(*comm_parse_extra) (int, symbolS *, addressT))
1436 symbolS *symbolP = NULL;
1442 stop = mri_comment_field (&stopc);
1444 name = input_line_pointer;
1445 c = get_symbol_end ();
1446 /* Just after name is now '\0'. */
1447 p = input_line_pointer;
1452 as_bad (_("expected symbol name"));
1453 ignore_rest_of_line ();
1459 /* Accept an optional comma after the name. The comma used to be
1460 required, but Irix 5 cc does not generate it for .lcomm. */
1461 if (*input_line_pointer == ',')
1462 input_line_pointer++;
1464 temp = get_absolute_expr (&exp);
1466 size &= ((offsetT) 2 << (stdoutput->arch_info->bits_per_address - 1)) - 1;
1467 if (exp.X_op == O_absent)
1469 as_bad (_("missing size expression"));
1470 ignore_rest_of_line ();
1473 else if (temp != size || !exp.X_unsigned)
1475 as_warn (_("size (%ld) out of range, ignored"), (long) temp);
1476 ignore_rest_of_line ();
1481 symbolP = symbol_find_or_make (name);
1482 if ((S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
1483 && !S_IS_COMMON (symbolP))
1485 if (!S_IS_VOLATILE (symbolP))
1488 as_bad (_("symbol `%s' is already defined"), name);
1490 ignore_rest_of_line ();
1493 symbolP = symbol_clone (symbolP, 1);
1494 S_SET_SEGMENT (symbolP, undefined_section);
1495 S_SET_VALUE (symbolP, 0);
1496 symbol_set_frag (symbolP, &zero_address_frag);
1497 S_CLEAR_VOLATILE (symbolP);
1500 size = S_GET_VALUE (symbolP);
1503 else if (size != temp)
1504 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1505 name, (long) size, (long) temp);
1508 if (comm_parse_extra != NULL)
1509 symbolP = (*comm_parse_extra) (param, symbolP, size);
1512 S_SET_VALUE (symbolP, (valueT) size);
1513 S_SET_EXTERNAL (symbolP);
1514 S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
1517 extern int flag_one;
1518 if (size == 0 || !flag_one)
1519 S_GET_OTHER (symbolP) = const_flag;
1524 demand_empty_rest_of_line ();
1527 mri_comment_end (stop, stopc);
1534 s_comm_internal (ignore, NULL);
1537 /* The MRI COMMON pseudo-op. We handle this by creating a common
1538 symbol with the appropriate name. We make s_space do the right
1539 thing by increasing the size. */
1542 s_mri_common (int small ATTRIBUTE_UNUSED)
1558 stop = mri_comment_field (&stopc);
1562 name = input_line_pointer;
1563 if (!ISDIGIT (*name))
1564 c = get_symbol_end ();
1569 ++input_line_pointer;
1571 while (ISDIGIT (*input_line_pointer));
1573 c = *input_line_pointer;
1574 *input_line_pointer = '\0';
1576 if (line_label != NULL)
1578 alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
1579 + (input_line_pointer - name)
1581 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1586 sym = symbol_find_or_make (name);
1587 *input_line_pointer = c;
1591 if (*input_line_pointer != ',')
1595 ++input_line_pointer;
1596 align = get_absolute_expression ();
1599 if (S_IS_DEFINED (sym) && !S_IS_COMMON (sym))
1601 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym));
1602 ignore_rest_of_line ();
1603 mri_comment_end (stop, stopc);
1607 S_SET_EXTERNAL (sym);
1608 S_SET_SEGMENT (sym, bfd_com_section_ptr);
1609 mri_common_symbol = sym;
1613 S_SET_ALIGN (sym, align);
1616 if (line_label != NULL)
1619 exp.X_op = O_symbol;
1620 exp.X_add_symbol = sym;
1621 exp.X_add_number = 0;
1622 symbol_set_value_expression (line_label, &exp);
1623 symbol_set_frag (line_label, &zero_address_frag);
1624 S_SET_SEGMENT (line_label, expr_section);
1627 /* FIXME: We just ignore the small argument, which distinguishes
1628 COMMON and COMMON.S. I don't know what we can do about it. */
1630 /* Ignore the type and hptype. */
1631 if (*input_line_pointer == ',')
1632 input_line_pointer += 2;
1633 if (*input_line_pointer == ',')
1634 input_line_pointer += 2;
1636 demand_empty_rest_of_line ();
1638 mri_comment_end (stop, stopc);
1642 s_data (int ignore ATTRIBUTE_UNUSED)
1647 temp = get_absolute_expression ();
1648 if (flag_readonly_data_in_text)
1650 section = text_section;
1654 section = data_section;
1656 subseg_set (section, (subsegT) temp);
1661 demand_empty_rest_of_line ();
1664 /* Handle the .appfile pseudo-op. This is automatically generated by
1665 do_scrub_chars when a preprocessor # line comment is seen with a
1666 file name. This default definition may be overridden by the object
1667 or CPU specific pseudo-ops. This function is also the default
1668 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1672 s_app_file_string (char *file, int appfile ATTRIBUTE_UNUSED)
1676 listing_source_file (file);
1678 register_dependency (file);
1680 obj_app_file (file, appfile);
1685 s_app_file (int appfile)
1690 /* Some assemblers tolerate immediately following '"'. */
1691 if ((s = demand_copy_string (&length)) != 0)
1694 = (!new_logical_line_flags (s, -1, 1) && appfile);
1696 /* In MRI mode, the preprocessor may have inserted an extraneous
1699 && *input_line_pointer == '\''
1700 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1701 ++input_line_pointer;
1703 demand_empty_rest_of_line ();
1705 s_app_file_string (s, appfile);
1710 get_linefile_number (int *flag)
1714 if (*input_line_pointer < '0' || *input_line_pointer > '9')
1717 *flag = get_absolute_expression ();
1722 /* Handle the .appline pseudo-op. This is automatically generated by
1723 do_scrub_chars when a preprocessor # line comment is seen. This
1724 default definition may be overridden by the object or CPU specific
1728 s_app_line (int appline)
1733 /* The given number is that of the next line. */
1735 l = get_absolute_expression ();
1736 else if (!get_linefile_number (&l))
1738 ignore_rest_of_line ();
1745 /* Some of the back ends can't deal with non-positive line numbers.
1746 Besides, it's silly. GCC however will generate a line number of
1747 zero when it is pre-processing builtins for assembler-with-cpp files:
1751 We do not want to barf on this, especially since such files are used
1752 in the GCC and GDB testsuites. So we check for negative line numbers
1753 rather than non-positive line numbers. */
1754 as_warn (_("line numbers must be positive; line number %d rejected"),
1765 if (*input_line_pointer == '"')
1766 file = demand_copy_string (&length);
1772 while (get_linefile_number (&this_flag))
1775 /* From GCC's cpp documentation:
1776 1: start of a new file.
1777 2: returning to a file after having included
1779 3: following text comes from a system header file.
1780 4: following text should be treated as extern "C".
1782 4 is nonsensical for the assembler; 3, we don't
1783 care about, so we ignore it just in case a
1784 system header file is included while
1785 preprocessing assembly. So 1 and 2 are all we
1786 care about, and they are mutually incompatible.
1787 new_logical_line_flags() demands this. */
1790 if (flags && flags != (1 << this_flag))
1791 as_warn (_("incompatible flag %i in line directive"),
1794 flags |= 1 << this_flag;
1799 /* We ignore these. */
1803 as_warn (_("unsupported flag %i in line directive"),
1808 if (!is_end_of_line[(unsigned char)*input_line_pointer])
1813 if (appline || file)
1815 new_logical_line_flags (file, l, flags);
1818 listing_source_line (l);
1822 if (appline || file)
1823 demand_empty_rest_of_line ();
1825 ignore_rest_of_line ();
1828 /* Handle the .end pseudo-op. Actually, the real work is done in
1829 read_a_source_file. */
1832 s_end (int ignore ATTRIBUTE_UNUSED)
1836 /* The MRI assembler permits the start symbol to follow .end,
1837 but we don't support that. */
1839 if (!is_end_of_line[(unsigned char) *input_line_pointer]
1840 && *input_line_pointer != '*'
1841 && *input_line_pointer != '!')
1842 as_warn (_("start address not supported"));
1846 /* Handle the .err pseudo-op. */
1849 s_err (int ignore ATTRIBUTE_UNUSED)
1851 as_bad (_(".err encountered"));
1852 demand_empty_rest_of_line ();
1855 /* Handle the .error and .warning pseudo-ops. */
1861 /* The purpose for the conditional assignment is not to
1862 internationalize the directive itself, but that we need a
1863 self-contained message, one that can be passed like the
1864 demand_copy_C_string return value, and with no assumption on the
1865 location of the name of the directive within the message. */
1867 = (err ? _(".error directive invoked in source file")
1868 : _(".warning directive invoked in source file"));
1870 if (!is_it_end_of_statement ())
1872 if (*input_line_pointer != '\"')
1874 as_bad (_("%s argument must be a string"),
1875 err ? ".error" : ".warning");
1876 ignore_rest_of_line ();
1880 msg = demand_copy_C_string (&len);
1888 as_warn ("%s", msg);
1889 demand_empty_rest_of_line ();
1892 /* Handle the MRI fail pseudo-op. */
1895 s_fail (int ignore ATTRIBUTE_UNUSED)
1902 stop = mri_comment_field (&stopc);
1904 temp = get_absolute_expression ();
1906 as_warn (_(".fail %ld encountered"), (long) temp);
1908 as_bad (_(".fail %ld encountered"), (long) temp);
1910 demand_empty_rest_of_line ();
1913 mri_comment_end (stop, stopc);
1917 s_fill (int ignore ATTRIBUTE_UNUSED)
1919 expressionS rep_exp;
1921 register long fill = 0;
1924 #ifdef md_flush_pending_output
1925 md_flush_pending_output ();
1928 #ifdef md_cons_align
1932 get_known_segmented_expression (&rep_exp);
1933 if (*input_line_pointer == ',')
1935 input_line_pointer++;
1936 size = get_absolute_expression ();
1937 if (*input_line_pointer == ',')
1939 input_line_pointer++;
1940 fill = get_absolute_expression ();
1944 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1945 #define BSD_FILL_SIZE_CROCK_8 (8)
1946 if (size > BSD_FILL_SIZE_CROCK_8)
1948 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8);
1949 size = BSD_FILL_SIZE_CROCK_8;
1953 as_warn (_("size negative; .fill ignored"));
1956 else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
1958 if (rep_exp.X_add_number < 0)
1959 as_warn (_("repeat < 0; .fill ignored"));
1963 if (size && !need_pass_2)
1965 if (rep_exp.X_op == O_constant)
1967 p = frag_var (rs_fill, (int) size, (int) size,
1968 (relax_substateT) 0, (symbolS *) 0,
1969 (offsetT) rep_exp.X_add_number,
1974 /* We don't have a constant repeat count, so we can't use
1975 rs_fill. We can get the same results out of rs_space,
1976 but its argument is in bytes, so we must multiply the
1977 repeat count by size. */
1980 rep_sym = make_expr_symbol (&rep_exp);
1983 expressionS size_exp;
1984 size_exp.X_op = O_constant;
1985 size_exp.X_add_number = size;
1987 rep_exp.X_op = O_multiply;
1988 rep_exp.X_add_symbol = rep_sym;
1989 rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
1990 rep_exp.X_add_number = 0;
1991 rep_sym = make_expr_symbol (&rep_exp);
1994 p = frag_var (rs_space, (int) size, (int) size,
1995 (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
1998 memset (p, 0, (unsigned int) size);
2000 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
2001 flavoured AS. The following bizarre behaviour is to be
2002 compatible with above. I guess they tried to take up to 8
2003 bytes from a 4-byte expression and they forgot to sign
2005 #define BSD_FILL_SIZE_CROCK_4 (4)
2006 md_number_to_chars (p, (valueT) fill,
2007 (size > BSD_FILL_SIZE_CROCK_4
2008 ? BSD_FILL_SIZE_CROCK_4
2010 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
2011 but emits no error message because it seems a legal thing to do.
2012 It is a degenerate case of .fill but could be emitted by a
2015 demand_empty_rest_of_line ();
2019 s_globl (int ignore ATTRIBUTE_UNUSED)
2028 stop = mri_comment_field (&stopc);
2032 name = input_line_pointer;
2033 c = get_symbol_end ();
2034 symbolP = symbol_find_or_make (name);
2035 S_SET_EXTERNAL (symbolP);
2037 *input_line_pointer = c;
2039 c = *input_line_pointer;
2042 input_line_pointer++;
2044 if (is_end_of_line[(unsigned char) *input_line_pointer])
2050 demand_empty_rest_of_line ();
2053 mri_comment_end (stop, stopc);
2057 #define skip_whitespace(str) do { if (*(str) == ' ') ++(str); } while (0)
2060 skip_past_char (char ** str, char c)
2070 #define skip_past_comma(str) skip_past_char (str, ',')
2072 /* Parse an attribute directive for VENDOR.
2073 Returns the attribute number read, or zero on error. */
2075 s_vendor_attribute (int vendor)
2083 /* Read the first number or name. */
2084 skip_whitespace (input_line_pointer);
2085 s = input_line_pointer;
2086 if (ISDIGIT (*input_line_pointer))
2089 if (exp.X_op != O_constant)
2091 tag = exp.X_add_number;
2097 /* A name may contain '_', but no other punctuation. */
2098 for (; ISALNUM (*input_line_pointer) || *input_line_pointer == '_';
2099 ++input_line_pointer)
2104 name = (char *) alloca (i + 1);
2105 memcpy (name, s, i);
2108 #ifndef CONVERT_SYMBOLIC_ATTRIBUTE
2109 #define CONVERT_SYMBOLIC_ATTRIBUTE(a) -1
2112 tag = CONVERT_SYMBOLIC_ATTRIBUTE (name);
2115 as_bad (_("Attribute name not recognised: %s"), name);
2116 ignore_rest_of_line ();
2121 type = _bfd_elf_obj_attrs_arg_type (stdoutput, vendor, tag);
2123 if (skip_past_comma (&input_line_pointer) == -1)
2128 if (exp.X_op != O_constant)
2130 as_bad (_("expected numeric constant"));
2131 ignore_rest_of_line ();
2134 i = exp.X_add_number;
2137 && skip_past_comma (&input_line_pointer) == -1)
2139 as_bad (_("expected comma"));
2140 ignore_rest_of_line ();
2147 skip_whitespace (input_line_pointer);
2148 if (*input_line_pointer != '"')
2150 s = demand_copy_C_string (&len);
2156 bfd_elf_add_obj_attr_int_string (stdoutput, vendor, tag, i, s);
2159 bfd_elf_add_obj_attr_string (stdoutput, vendor, tag, s);
2162 bfd_elf_add_obj_attr_int (stdoutput, vendor, tag, i);
2168 demand_empty_rest_of_line ();
2171 as_bad (_("bad string constant"));
2172 ignore_rest_of_line ();
2175 as_bad (_("expected <tag> , <value>"));
2176 ignore_rest_of_line ();
2180 /* Parse a .gnu_attribute directive. */
2183 s_gnu_attribute (int ignored ATTRIBUTE_UNUSED)
2185 s_vendor_attribute (OBJ_ATTR_GNU);
2187 #endif /* OBJ_ELF */
2189 /* Handle the MRI IRP and IRPC pseudo-ops. */
2200 as_where (&file, &line);
2203 eol = find_end_of_line (input_line_pointer, 0);
2204 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2205 input_line_pointer = eol;
2209 err = expand_irp (irpc, 0, &s, &out, get_non_macro_line_sb);
2211 as_bad_where (file, line, "%s", err);
2215 input_scrub_include_sb (&out, input_line_pointer, 1);
2217 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2220 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2221 the section to only be linked once. However, this is not supported
2222 by most object file formats. This takes an optional argument,
2223 which is what to do about duplicates. */
2226 s_linkonce (int ignore ATTRIBUTE_UNUSED)
2228 enum linkonce_type type;
2232 type = LINKONCE_DISCARD;
2234 if (!is_end_of_line[(unsigned char) *input_line_pointer])
2239 s = input_line_pointer;
2240 c = get_symbol_end ();
2241 if (strcasecmp (s, "discard") == 0)
2242 type = LINKONCE_DISCARD;
2243 else if (strcasecmp (s, "one_only") == 0)
2244 type = LINKONCE_ONE_ONLY;
2245 else if (strcasecmp (s, "same_size") == 0)
2246 type = LINKONCE_SAME_SIZE;
2247 else if (strcasecmp (s, "same_contents") == 0)
2248 type = LINKONCE_SAME_CONTENTS;
2250 as_warn (_("unrecognized .linkonce type `%s'"), s);
2252 *input_line_pointer = c;
2255 #ifdef obj_handle_link_once
2256 obj_handle_link_once (type);
2257 #else /* ! defined (obj_handle_link_once) */
2261 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
2262 as_warn (_(".linkonce is not supported for this object file format"));
2264 flags = bfd_get_section_flags (stdoutput, now_seg);
2265 flags |= SEC_LINK_ONCE;
2270 case LINKONCE_DISCARD:
2271 flags |= SEC_LINK_DUPLICATES_DISCARD;
2273 case LINKONCE_ONE_ONLY:
2274 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
2276 case LINKONCE_SAME_SIZE:
2277 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
2279 case LINKONCE_SAME_CONTENTS:
2280 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
2283 if (!bfd_set_section_flags (stdoutput, now_seg, flags))
2284 as_bad (_("bfd_set_section_flags: %s"),
2285 bfd_errmsg (bfd_get_error ()));
2287 #endif /* ! defined (obj_handle_link_once) */
2289 demand_empty_rest_of_line ();
2293 bss_alloc (symbolS *symbolP, addressT size, int align)
2296 segT current_seg = now_seg;
2297 subsegT current_subseg = now_subseg;
2298 segT bss_seg = bss_section;
2300 #if defined (TC_MIPS) || defined (TC_ALPHA)
2301 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
2302 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
2304 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2305 if (size <= bfd_get_gp_size (stdoutput))
2307 bss_seg = subseg_new (".sbss", 1);
2308 seg_info (bss_seg)->bss = 1;
2309 if (!bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
2310 as_warn (_("error setting flags for \".sbss\": %s"),
2311 bfd_errmsg (bfd_get_error ()));
2315 subseg_set (bss_seg, 1);
2319 record_alignment (bss_seg, align);
2320 frag_align (align, 0, 0);
2323 /* Detach from old frag. */
2324 if (S_GET_SEGMENT (symbolP) == bss_seg)
2325 symbol_get_frag (symbolP)->fr_symbol = NULL;
2327 symbol_set_frag (symbolP, frag_now);
2328 pfrag = frag_var (rs_org, 1, 1, 0, symbolP, size, NULL);
2332 S_SET_SIZE (symbolP, size);
2334 S_SET_SEGMENT (symbolP, bss_seg);
2337 /* The symbol may already have been created with a preceding
2338 ".globl" directive -- be careful not to step on storage class
2339 in that case. Otherwise, set it to static. */
2340 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
2341 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2342 #endif /* OBJ_COFF */
2344 subseg_set (current_seg, current_subseg);
2348 parse_align (int align_bytes)
2354 if (*input_line_pointer != ',')
2357 as_bad (_("expected alignment after size"));
2358 ignore_rest_of_line ();
2362 input_line_pointer++;
2365 align = get_absolute_expr (&exp);
2366 if (exp.X_op == O_absent)
2369 if (!exp.X_unsigned)
2371 as_warn (_("alignment negative; 0 assumed"));
2375 if (align_bytes && align != 0)
2377 /* convert to a power of 2 alignment */
2378 unsigned int alignp2 = 0;
2379 while ((align & 1) == 0)
2380 align >>= 1, ++alignp2;
2383 as_bad (_("alignment not a power of 2"));
2384 ignore_rest_of_line ();
2392 /* Called from s_comm_internal after symbol name and size have been
2393 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2394 1 if this was a ".bss" directive which has a 3rd argument
2395 (alignment as a power of 2), or 2 if this was a ".bss" directive
2396 with alignment in bytes. */
2399 s_lcomm_internal (int needs_align, symbolS *symbolP, addressT size)
2405 align = parse_align (needs_align - 1);
2406 if (align == (addressT) -1)
2410 /* Assume some objects may require alignment on some systems. */
2411 TC_IMPLICIT_LCOMM_ALIGNMENT (size, align);
2413 bss_alloc (symbolP, size, align);
2418 s_lcomm (int needs_align)
2420 s_comm_internal (needs_align, s_lcomm_internal);
2424 s_lcomm_bytes (int needs_align)
2426 s_comm_internal (needs_align * 2, s_lcomm_internal);
2430 s_lsym (int ignore ATTRIBUTE_UNUSED)
2432 register char *name;
2436 register symbolS *symbolP;
2438 /* We permit ANY defined expression: BSD4.2 demands constants. */
2439 name = input_line_pointer;
2440 c = get_symbol_end ();
2441 p = input_line_pointer;
2446 as_bad (_("expected symbol name"));
2447 ignore_rest_of_line ();
2453 if (*input_line_pointer != ',')
2456 as_bad (_("expected comma after \"%s\""), name);
2458 ignore_rest_of_line ();
2462 input_line_pointer++;
2463 expression_and_evaluate (&exp);
2465 if (exp.X_op != O_constant
2466 && exp.X_op != O_register)
2468 as_bad (_("bad expression"));
2469 ignore_rest_of_line ();
2474 symbolP = symbol_find_or_make (name);
2476 if (S_GET_SEGMENT (symbolP) == undefined_section)
2478 /* The name might be an undefined .global symbol; be sure to
2479 keep the "external" bit. */
2480 S_SET_SEGMENT (symbolP,
2481 (exp.X_op == O_constant
2484 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2488 as_bad (_("symbol `%s' is already defined"), name);
2492 demand_empty_rest_of_line ();
2495 /* Read a line into an sb. Returns the character that ended the line
2496 or zero if there are no more lines. */
2499 get_line_sb (sb *line, int in_macro)
2503 if (input_line_pointer[-1] == '\n')
2504 bump_line_counters ();
2506 if (input_line_pointer >= buffer_limit)
2508 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2509 if (buffer_limit == 0)
2513 eol = _find_end_of_line (input_line_pointer, flag_m68k_mri, 0, in_macro);
2514 sb_add_buffer (line, input_line_pointer, eol - input_line_pointer);
2515 input_line_pointer = eol;
2517 /* Don't skip multiple end-of-line characters, because that breaks support
2518 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2519 characters but isn't. Instead just skip one end of line character and
2520 return the character skipped so that the caller can re-insert it if
2522 return *input_line_pointer++;
2526 get_non_macro_line_sb (sb *line)
2528 return get_line_sb (line, 0);
2532 get_macro_line_sb (sb *line)
2534 return get_line_sb (line, 1);
2537 /* Define a macro. This is an interface to macro.c. */
2540 s_macro (int ignore ATTRIBUTE_UNUSED)
2548 as_where (&file, &line);
2551 eol = find_end_of_line (input_line_pointer, 0);
2552 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2553 input_line_pointer = eol;
2555 if (line_label != NULL)
2560 sb_add_string (&label, S_GET_NAME (line_label));
2561 err = define_macro (0, &s, &label, get_macro_line_sb, file, line, &name);
2565 err = define_macro (0, &s, NULL, get_macro_line_sb, file, line, &name);
2567 as_bad_where (file, line, err, name);
2570 if (line_label != NULL)
2572 S_SET_SEGMENT (line_label, absolute_section);
2573 S_SET_VALUE (line_label, 0);
2574 symbol_set_frag (line_label, &zero_address_frag);
2577 if (((NO_PSEUDO_DOT || flag_m68k_mri)
2578 && hash_find (po_hash, name) != NULL)
2581 && hash_find (po_hash, name + 1) != NULL))
2582 as_warn_where (file,
2584 _("attempt to redefine pseudo-op `%s' ignored"),
2591 /* Handle the .mexit pseudo-op, which immediately exits a macro
2595 s_mexit (int ignore ATTRIBUTE_UNUSED)
2599 cond_exit_macro (macro_nest);
2600 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2603 as_warn (_("ignoring macro exit outside a macro definition."));
2606 /* Switch in and out of MRI mode. */
2609 s_mri (int ignore ATTRIBUTE_UNUSED)
2613 on = get_absolute_expression ();
2614 old_flag = flag_mri;
2632 /* Operator precedence changes in m68k MRI mode, so we need to
2633 update the operator rankings. */
2634 expr_set_precedence ();
2636 #ifdef MRI_MODE_CHANGE
2638 MRI_MODE_CHANGE (on);
2641 demand_empty_rest_of_line ();
2644 /* Handle changing the location counter. */
2647 do_org (segT segment, expressionS *exp, int fill)
2649 if (segment != now_seg && segment != absolute_section)
2650 as_bad (_("invalid segment \"%s\""), segment_name (segment));
2652 if (now_seg == absolute_section)
2655 as_warn (_("ignoring fill value in absolute section"));
2656 if (exp->X_op != O_constant)
2658 as_bad (_("only constant offsets supported in absolute section"));
2659 exp->X_add_number = 0;
2661 abs_section_offset = exp->X_add_number;
2666 symbolS *sym = exp->X_add_symbol;
2667 offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
2669 if (exp->X_op != O_constant && exp->X_op != O_symbol)
2671 /* Handle complex expressions. */
2672 sym = make_expr_symbol (exp);
2676 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
2682 s_org (int ignore ATTRIBUTE_UNUSED)
2684 register segT segment;
2686 register long temp_fill;
2688 #ifdef md_flush_pending_output
2689 md_flush_pending_output ();
2692 /* The m68k MRI assembler has a different meaning for .org. It
2693 means to create an absolute section at a given address. We can't
2694 support that--use a linker script instead. */
2697 as_bad (_("MRI style ORG pseudo-op not supported"));
2698 ignore_rest_of_line ();
2702 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2703 thing as a sub-segment-relative origin. Any absolute origin is
2704 given a warning, then assumed to be segment-relative. Any
2705 segmented origin expression ("foo+42") had better be in the right
2706 segment or the .org is ignored.
2708 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2709 we never know sub-segment sizes when we are reading code. BSD
2710 will crash trying to emit negative numbers of filler bytes in
2711 certain .orgs. We don't crash, but see as-write for that code.
2713 Don't make frag if need_pass_2==1. */
2714 segment = get_known_segmented_expression (&exp);
2715 if (*input_line_pointer == ',')
2717 input_line_pointer++;
2718 temp_fill = get_absolute_expression ();
2724 do_org (segment, &exp, temp_fill);
2726 demand_empty_rest_of_line ();
2729 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2730 called by the obj-format routine which handles section changing
2731 when in MRI mode. It will create a new section, and return it. It
2732 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2733 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2736 s_mri_sect (char *type ATTRIBUTE_UNUSED)
2746 name = input_line_pointer;
2747 if (!ISDIGIT (*name))
2748 c = get_symbol_end ();
2753 ++input_line_pointer;
2755 while (ISDIGIT (*input_line_pointer));
2757 c = *input_line_pointer;
2758 *input_line_pointer = '\0';
2761 name = xstrdup (name);
2763 *input_line_pointer = c;
2765 seg = subseg_new (name, 0);
2767 if (*input_line_pointer == ',')
2771 ++input_line_pointer;
2772 align = get_absolute_expression ();
2773 record_alignment (seg, align);
2777 if (*input_line_pointer == ',')
2779 c = *++input_line_pointer;
2781 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2784 as_bad (_("unrecognized section type"));
2785 ++input_line_pointer;
2790 flags = SEC_NO_FLAGS;
2792 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2793 else if (*type == 'D' || *type == 'M')
2794 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2795 else if (*type == 'R')
2796 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2797 if (flags != SEC_NO_FLAGS)
2799 if (!bfd_set_section_flags (stdoutput, seg, flags))
2800 as_warn (_("error setting flags for \"%s\": %s"),
2801 bfd_section_name (stdoutput, seg),
2802 bfd_errmsg (bfd_get_error ()));
2807 /* Ignore the HP type. */
2808 if (*input_line_pointer == ',')
2809 input_line_pointer += 2;
2811 demand_empty_rest_of_line ();
2813 #else /* ! TC_M68K */
2822 name = input_line_pointer;
2823 c = get_symbol_end ();
2825 name = xstrdup (name);
2827 *input_line_pointer = c;
2829 seg = subseg_new (name, 0);
2831 if (*input_line_pointer != ',')
2837 ++input_line_pointer;
2839 sectype = input_line_pointer;
2840 c = get_symbol_end ();
2841 if (*sectype == '\0')
2843 else if (strcasecmp (sectype, "text") == 0)
2845 else if (strcasecmp (sectype, "data") == 0)
2847 else if (strcasecmp (sectype, "romdata") == 0)
2850 as_warn (_("unrecognized section type `%s'"), sectype);
2851 *input_line_pointer = c;
2854 if (*input_line_pointer == ',')
2858 ++input_line_pointer;
2860 seccmd = input_line_pointer;
2861 c = get_symbol_end ();
2862 if (strcasecmp (seccmd, "absolute") == 0)
2864 as_bad (_("absolute sections are not supported"));
2865 *input_line_pointer = c;
2866 ignore_rest_of_line ();
2869 else if (strcasecmp (seccmd, "align") == 0)
2873 *input_line_pointer = c;
2874 align = get_absolute_expression ();
2875 record_alignment (seg, align);
2879 as_warn (_("unrecognized section command `%s'"), seccmd);
2880 *input_line_pointer = c;
2884 demand_empty_rest_of_line ();
2886 #else /* ! TC_I960 */
2887 /* The MRI assembler seems to use different forms of .sect for
2888 different targets. */
2889 as_bad ("MRI mode not supported for this target");
2890 ignore_rest_of_line ();
2891 #endif /* ! TC_I960 */
2892 #endif /* ! TC_M68K */
2895 /* Handle the .print pseudo-op. */
2898 s_print (int ignore ATTRIBUTE_UNUSED)
2903 s = demand_copy_C_string (&len);
2906 demand_empty_rest_of_line ();
2909 /* Handle the .purgem pseudo-op. */
2912 s_purgem (int ignore ATTRIBUTE_UNUSED)
2914 if (is_it_end_of_statement ())
2916 demand_empty_rest_of_line ();
2926 name = input_line_pointer;
2927 c = get_symbol_end ();
2928 delete_macro (name);
2929 *input_line_pointer = c;
2932 while (*input_line_pointer++ == ',');
2934 --input_line_pointer;
2935 demand_empty_rest_of_line ();
2938 /* Handle the .endm/.endr pseudo-ops. */
2941 s_bad_end (int endr)
2943 as_warn (_(".end%c encountered without preceeding %s"),
2945 endr ? ".rept, .irp, or .irpc" : ".macro");
2946 demand_empty_rest_of_line ();
2949 /* Handle the .rept pseudo-op. */
2952 s_rept (int ignore ATTRIBUTE_UNUSED)
2956 count = get_absolute_expression ();
2958 do_repeat (count, "REPT", "ENDR");
2961 /* This function provides a generic repeat block implementation. It allows
2962 different directives to be used as the start/end keys. */
2965 do_repeat (int count, const char *start, const char *end)
2971 if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
2973 as_bad (_("%s without %s"), start, end);
2979 sb_add_sb (&many, &one);
2983 input_scrub_include_sb (&many, input_line_pointer, 1);
2985 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2988 /* Like do_repeat except that any text matching EXPANDER in the
2989 block is replaced by the itteration count. */
2992 do_repeat_with_expander (int count,
2995 const char * expander)
3001 if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
3003 as_bad (_("%s without %s"), start, end);
3009 if (expander != NULL && strstr (one.ptr, expander) != NULL)
3011 while (count -- > 0)
3017 sb_new (& processed);
3018 sb_add_sb (& processed, & one);
3019 sub = strstr (processed.ptr, expander);
3020 len = sprintf (sub, "%d", count);
3021 gas_assert (len < 8);
3022 strcpy (sub + len, sub + 8);
3023 processed.len -= (8 - len);
3024 sb_add_sb (& many, & processed);
3025 sb_kill (& processed);
3030 sb_add_sb (&many, &one);
3034 input_scrub_include_sb (&many, input_line_pointer, 1);
3036 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
3039 /* Skip to end of current repeat loop; EXTRA indicates how many additional
3040 input buffers to skip. Assumes that conditionals preceding the loop end
3041 are properly nested.
3043 This function makes it easier to implement a premature "break" out of the
3044 loop. The EXTRA arg accounts for other buffers we might have inserted,
3045 such as line substitutions. */
3048 end_repeat (int extra)
3050 cond_exit_macro (macro_nest);
3051 while (extra-- >= 0)
3052 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
3056 assign_symbol (char *name, int mode)
3060 if (name[0] == '.' && name[1] == '\0')
3062 /* Turn '. = mumble' into a .org mumble. */
3066 segment = get_known_segmented_expression (&exp);
3069 do_org (segment, &exp, 0);
3074 if ((symbolP = symbol_find (name)) == NULL
3075 && (symbolP = md_undefined_symbol (name)) == NULL)
3077 symbolP = symbol_find_or_make (name);
3079 /* When doing symbol listings, play games with dummy fragments living
3080 outside the normal fragment chain to record the file and line info
3082 if (listing & LISTING_SYMBOLS)
3084 extern struct list_info_struct *listing_tail;
3085 fragS *dummy_frag = (fragS *) xcalloc (1, sizeof (fragS));
3086 dummy_frag->line = listing_tail;
3087 dummy_frag->fr_symbol = symbolP;
3088 symbol_set_frag (symbolP, dummy_frag);
3092 /* "set" symbols are local unless otherwise specified. */
3093 SF_SET_LOCAL (symbolP);
3097 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
3099 /* Permit register names to be redefined. */
3100 if ((mode != 0 || !S_IS_VOLATILE (symbolP))
3101 && S_GET_SEGMENT (symbolP) != reg_section)
3103 as_bad (_("symbol `%s' is already defined"), name);
3104 symbolP = symbol_clone (symbolP, 0);
3106 /* If the symbol is volatile, copy the symbol and replace the
3107 original with the copy, so that previous uses of the symbol will
3108 retain the value of the symbol at the point of use. */
3109 else if (S_IS_VOLATILE (symbolP))
3110 symbolP = symbol_clone (symbolP, 1);
3114 S_SET_VOLATILE (symbolP);
3116 S_SET_FORWARD_REF (symbolP);
3118 pseudo_set (symbolP);
3121 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3122 then this is .equiv, and it is an error if the symbol is already
3123 defined. If EQUIV is -1, the symbol additionally is a forward
3133 /* Especial apologies for the random logic:
3134 this just grew, and could be parsed much more simply!
3136 name = input_line_pointer;
3137 delim = get_symbol_end ();
3138 end_name = input_line_pointer;
3141 if (name == end_name)
3143 as_bad (_("expected symbol name"));
3144 ignore_rest_of_line ();
3150 if (*input_line_pointer != ',')
3153 as_bad (_("expected comma after \"%s\""), name);
3155 ignore_rest_of_line ();
3159 input_line_pointer++;
3162 assign_symbol (name, equiv);
3165 demand_empty_rest_of_line ();
3178 #ifdef md_flush_pending_output
3179 md_flush_pending_output ();
3182 #ifdef md_cons_align
3187 stop = mri_comment_field (&stopc);
3189 /* In m68k MRI mode, we need to align to a word boundary, unless
3191 if (flag_m68k_mri && mult > 1)
3193 if (now_seg == absolute_section)
3195 abs_section_offset += abs_section_offset & 1;
3196 if (line_label != NULL)
3197 S_SET_VALUE (line_label, abs_section_offset);
3199 else if (mri_common_symbol != NULL)
3203 val = S_GET_VALUE (mri_common_symbol);
3206 S_SET_VALUE (mri_common_symbol, val + 1);
3207 if (line_label != NULL)
3209 expressionS *symexp;
3211 symexp = symbol_get_value_expression (line_label);
3212 know (symexp->X_op == O_symbol);
3213 know (symexp->X_add_symbol == mri_common_symbol);
3214 symexp->X_add_number += 1;
3220 do_align (1, (char *) NULL, 0, 0);
3221 if (line_label != NULL)
3223 symbol_set_frag (line_label, frag_now);
3224 S_SET_VALUE (line_label, frag_now_fix ());
3234 if (*input_line_pointer == ',')
3236 ++input_line_pointer;
3241 val.X_op = O_constant;
3242 val.X_add_number = 0;
3245 if (val.X_op != O_constant
3246 || val.X_add_number < - 0x80
3247 || val.X_add_number > 0xff
3248 || (mult != 0 && mult != 1 && val.X_add_number != 0))
3250 resolve_expression (&exp);
3251 if (exp.X_op != O_constant)
3252 as_bad (_("unsupported variable size or fill value"));
3259 bytes = mult * exp.X_add_number;
3260 for (i = 0; i < exp.X_add_number; i++)
3261 emit_expr (&val, mult);
3266 if (now_seg == absolute_section || mri_common_symbol != NULL)
3267 resolve_expression (&exp);
3269 if (exp.X_op == O_constant)
3273 repeat = exp.X_add_number;
3280 as_warn (_(".space repeat count is zero, ignored"));
3281 else if (repeat < 0)
3282 as_warn (_(".space repeat count is negative, ignored"));
3286 /* If we are in the absolute section, just bump the offset. */
3287 if (now_seg == absolute_section)
3289 abs_section_offset += repeat;
3293 /* If we are secretly in an MRI common section, then
3294 creating space just increases the size of the common
3296 if (mri_common_symbol != NULL)
3298 S_SET_VALUE (mri_common_symbol,
3299 S_GET_VALUE (mri_common_symbol) + repeat);
3304 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
3305 (offsetT) repeat, (char *) 0);
3309 if (now_seg == absolute_section)
3311 as_bad (_("space allocation too complex in absolute section"));
3312 subseg_set (text_section, 0);
3315 if (mri_common_symbol != NULL)
3317 as_bad (_("space allocation too complex in common section"));
3318 mri_common_symbol = NULL;
3322 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
3323 make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
3327 *p = val.X_add_number;
3332 /* In MRI mode, after an odd number of bytes, we must align to an
3333 even word boundary, unless the next instruction is a dc.b, ds.b
3335 if (flag_mri && (bytes & 1) != 0)
3336 mri_pending_align = 1;
3338 demand_empty_rest_of_line ();
3341 mri_comment_end (stop, stopc);
3344 /* This is like s_space, but the value is a floating point number with
3345 the given precision. This is for the MRI dcb.s pseudo-op and
3349 s_float_space (int float_type)
3353 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3357 #ifdef md_cons_align
3362 stop = mri_comment_field (&stopc);
3364 count = get_absolute_expression ();
3367 if (*input_line_pointer != ',')
3369 as_bad (_("missing value"));
3370 ignore_rest_of_line ();
3372 mri_comment_end (stop, stopc);
3376 ++input_line_pointer;
3380 /* Skip any 0{letter} that may be present. Don't even check if the
3381 * letter is legal. */
3382 if (input_line_pointer[0] == '0'
3383 && ISALPHA (input_line_pointer[1]))
3384 input_line_pointer += 2;
3386 /* Accept :xxxx, where the x's are hex digits, for a floating point
3387 with the exact digits specified. */
3388 if (input_line_pointer[0] == ':')
3390 flen = hex_float (float_type, temp);
3393 ignore_rest_of_line ();
3395 mri_comment_end (stop, stopc);
3403 err = md_atof (float_type, temp, &flen);
3404 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
3405 know (err != NULL || flen > 0);
3408 as_bad (_("bad floating literal: %s"), err);
3409 ignore_rest_of_line ();
3411 mri_comment_end (stop, stopc);
3416 while (--count >= 0)
3420 p = frag_more (flen);
3421 memcpy (p, temp, (unsigned int) flen);
3424 demand_empty_rest_of_line ();
3427 mri_comment_end (stop, stopc);
3430 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3433 s_struct (int ignore ATTRIBUTE_UNUSED)
3439 stop = mri_comment_field (&stopc);
3440 abs_section_offset = get_absolute_expression ();
3441 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3442 /* The ELF backend needs to know that we are changing sections, so
3443 that .previous works correctly. */
3445 obj_elf_section_change_hook ();
3447 subseg_set (absolute_section, 0);
3448 demand_empty_rest_of_line ();
3450 mri_comment_end (stop, stopc);
3454 s_text (int ignore ATTRIBUTE_UNUSED)
3458 temp = get_absolute_expression ();
3459 subseg_set (text_section, (subsegT) temp);
3460 demand_empty_rest_of_line ();
3462 const_flag &= ~IN_DEFAULT_SECTION;
3466 /* .weakref x, y sets x as an alias to y that, as long as y is not
3467 referenced directly, will cause y to become a weak symbol. */
3469 s_weakref (int ignore ATTRIBUTE_UNUSED)
3478 name = input_line_pointer;
3479 delim = get_symbol_end ();
3480 end_name = input_line_pointer;
3482 if (name == end_name)
3484 as_bad (_("expected symbol name"));
3486 ignore_rest_of_line ();
3490 symbolP = symbol_find_or_make (name);
3492 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
3494 if (!S_IS_VOLATILE (symbolP))
3496 as_bad (_("symbol `%s' is already defined"), name);
3498 ignore_rest_of_line ();
3501 symbolP = symbol_clone (symbolP, 1);
3502 S_CLEAR_VOLATILE (symbolP);
3509 if (*input_line_pointer != ',')
3512 as_bad (_("expected comma after \"%s\""), name);
3514 ignore_rest_of_line ();
3518 input_line_pointer++;
3522 name = input_line_pointer;
3523 delim = get_symbol_end ();
3524 end_name = input_line_pointer;
3526 if (name == end_name)
3528 as_bad (_("expected symbol name"));
3529 ignore_rest_of_line ();
3533 if ((symbolP2 = symbol_find_noref (name, 1)) == NULL
3534 && (symbolP2 = md_undefined_symbol (name)) == NULL)
3536 symbolP2 = symbol_find_or_make (name);
3537 S_SET_WEAKREFD (symbolP2);
3541 symbolS *symp = symbolP2;
3543 while (S_IS_WEAKREFR (symp) && symp != symbolP)
3545 expressionS *expP = symbol_get_value_expression (symp);
3547 gas_assert (expP->X_op == O_symbol
3548 && expP->X_add_number == 0);
3549 symp = expP->X_add_symbol;
3551 if (symp == symbolP)
3555 loop = concat (S_GET_NAME (symbolP),
3556 " => ", S_GET_NAME (symbolP2), (const char *) NULL);
3559 while (symp != symbolP)
3561 char *old_loop = loop;
3562 symp = symbol_get_value_expression (symp)->X_add_symbol;
3563 loop = concat (loop, " => ", S_GET_NAME (symp),
3564 (const char *) NULL);
3568 as_bad (_("%s: would close weakref loop: %s"),
3569 S_GET_NAME (symbolP), loop);
3574 ignore_rest_of_line ();
3578 /* Short-circuiting instead of just checking here might speed
3579 things up a tiny little bit, but loop error messages would
3580 miss intermediate links. */
3581 /* symbolP2 = symp; */
3586 memset (&exp, 0, sizeof (exp));
3587 exp.X_op = O_symbol;
3588 exp.X_add_symbol = symbolP2;
3590 S_SET_SEGMENT (symbolP, undefined_section);
3591 symbol_set_value_expression (symbolP, &exp);
3592 symbol_set_frag (symbolP, &zero_address_frag);
3593 S_SET_WEAKREFR (symbolP);
3595 demand_empty_rest_of_line ();
3599 /* Verify that we are at the end of a line. If not, issue an error and
3603 demand_empty_rest_of_line (void)
3606 if (is_end_of_line[(unsigned char) *input_line_pointer])
3607 input_line_pointer++;
3610 if (ISPRINT (*input_line_pointer))
3611 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3612 *input_line_pointer);
3614 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3615 *input_line_pointer);
3616 ignore_rest_of_line ();
3619 /* Return pointing just after end-of-line. */
3620 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3623 /* Silently advance to the end of line. Use this after already having
3624 issued an error about something bad. */
3627 ignore_rest_of_line (void)
3629 while (input_line_pointer < buffer_limit
3630 && !is_end_of_line[(unsigned char) *input_line_pointer])
3631 input_line_pointer++;
3633 input_line_pointer++;
3635 /* Return pointing just after end-of-line. */
3636 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3639 /* Sets frag for given symbol to zero_address_frag, except when the
3640 symbol frag is already set to a dummy listing frag. */
3643 set_zero_frag (symbolS *symbolP)
3645 if (symbol_get_frag (symbolP)->fr_type != rs_dummy)
3646 symbol_set_frag (symbolP, &zero_address_frag);
3649 /* In: Pointer to a symbol.
3650 Input_line_pointer->expression.
3652 Out: Input_line_pointer->just after any whitespace after expression.
3653 Tried to set symbol to value of expression.
3654 Will change symbols type, value, and frag; */
3657 pseudo_set (symbolS *symbolP)
3662 know (symbolP); /* NULL pointer is logic error. */
3664 if (!S_IS_FORWARD_REF (symbolP))
3665 (void) expression (&exp);
3667 (void) deferred_expression (&exp);
3669 if (exp.X_op == O_illegal)
3670 as_bad (_("illegal expression"));
3671 else if (exp.X_op == O_absent)
3672 as_bad (_("missing expression"));
3673 else if (exp.X_op == O_big)
3675 if (exp.X_add_number > 0)
3676 as_bad (_("bignum invalid"));
3678 as_bad (_("floating point number invalid"));
3680 else if (exp.X_op == O_subtract
3681 && !S_IS_FORWARD_REF (symbolP)
3682 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
3683 && (symbol_get_frag (exp.X_add_symbol)
3684 == symbol_get_frag (exp.X_op_symbol)))
3686 exp.X_op = O_constant;
3687 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
3688 - S_GET_VALUE (exp.X_op_symbol));
3691 if (symbol_section_p (symbolP))
3693 as_bad ("attempt to set value of section symbol");
3702 exp.X_add_number = 0;
3705 S_SET_SEGMENT (symbolP, absolute_section);
3706 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3707 set_zero_frag (symbolP);
3711 #ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
3712 if (S_IS_EXTERNAL (symbolP))
3714 as_bad ("can't equate global symbol `%s' with register name",
3715 S_GET_NAME (symbolP));
3719 S_SET_SEGMENT (symbolP, reg_section);
3720 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3721 set_zero_frag (symbolP);
3722 symbol_get_value_expression (symbolP)->X_op = O_register;
3726 seg = S_GET_SEGMENT (exp.X_add_symbol);
3727 /* For x=undef+const, create an expression symbol.
3728 For x=x+const, just update x except when x is an undefined symbol
3729 For x=defined+const, evaluate x. */
3730 if (symbolP == exp.X_add_symbol
3731 && (seg != undefined_section
3732 || !symbol_constant_p (symbolP)))
3734 *symbol_X_add_number (symbolP) += exp.X_add_number;
3737 else if (!S_IS_FORWARD_REF (symbolP) && seg != undefined_section)
3739 symbolS *s = exp.X_add_symbol;
3741 if (S_IS_COMMON (s))
3742 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3743 S_GET_NAME (symbolP), S_GET_NAME (s));
3745 S_SET_SEGMENT (symbolP, seg);
3746 S_SET_VALUE (symbolP, exp.X_add_number + S_GET_VALUE (s));
3747 symbol_set_frag (symbolP, symbol_get_frag (s));
3748 copy_symbol_attributes (symbolP, s);
3751 S_SET_SEGMENT (symbolP, undefined_section);
3752 symbol_set_value_expression (symbolP, &exp);
3753 copy_symbol_attributes (symbolP, exp.X_add_symbol);
3754 set_zero_frag (symbolP);
3758 /* The value is some complex expression. */
3759 S_SET_SEGMENT (symbolP, expr_section);
3760 symbol_set_value_expression (symbolP, &exp);
3761 set_zero_frag (symbolP);
3768 CONStruct more frag of .bytes, or .words etc.
3769 Should need_pass_2 be 1 then emit no frag(s).
3770 This understands EXPRESSIONS.
3774 This has a split personality. We use expression() to read the
3775 value. We can detect if the value won't fit in a byte or word.
3776 But we can't detect if expression() discarded significant digits
3777 in the case of a long. Not worth the crocks required to fix it. */
3779 /* Select a parser for cons expressions. */
3781 /* Some targets need to parse the expression in various fancy ways.
3782 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3783 (for example, the HPPA does this). Otherwise, you can define
3784 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3785 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3786 are defined, which is the normal case, then only simple expressions
3791 parse_mri_cons (expressionS *exp, unsigned int nbytes);
3794 #ifndef TC_PARSE_CONS_EXPRESSION
3795 #ifdef BITFIELD_CONS_EXPRESSIONS
3796 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3798 parse_bitfield_cons (expressionS *exp, unsigned int nbytes);
3800 #ifdef REPEAT_CONS_EXPRESSIONS
3801 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3803 parse_repeat_cons (expressionS *exp, unsigned int nbytes);
3806 /* If we haven't gotten one yet, just call expression. */
3807 #ifndef TC_PARSE_CONS_EXPRESSION
3808 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3813 do_parse_cons_expression (expressionS *exp,
3814 int nbytes ATTRIBUTE_UNUSED)
3816 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3820 /* Worker to do .byte etc statements.
3821 Clobbers input_line_pointer and checks end-of-line. */
3824 cons_worker (register int nbytes, /* 1=.byte, 2=.word, 4=.long. */
3832 #ifdef md_flush_pending_output
3833 md_flush_pending_output ();
3837 stop = mri_comment_field (&stopc);
3839 if (is_it_end_of_statement ())
3841 demand_empty_rest_of_line ();
3843 mri_comment_end (stop, stopc);
3847 #ifdef TC_ADDRESS_BYTES
3849 nbytes = TC_ADDRESS_BYTES ();
3852 #ifdef md_cons_align
3853 md_cons_align (nbytes);
3861 parse_mri_cons (&exp, (unsigned int) nbytes);
3864 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3868 if (exp.X_op == O_symbol)
3869 exp.X_op = O_symbol_rva;
3871 as_fatal (_("rva without symbol"));
3873 emit_expr (&exp, (unsigned int) nbytes);
3876 while (*input_line_pointer++ == ',');
3878 /* In MRI mode, after an odd number of bytes, we must align to an
3879 even word boundary, unless the next instruction is a dc.b, ds.b
3881 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3882 mri_pending_align = 1;
3884 input_line_pointer--; /* Put terminator back into stream. */
3886 demand_empty_rest_of_line ();
3889 mri_comment_end (stop, stopc);
3895 cons_worker (size, 0);
3901 cons_worker (size, 1);
3904 /* .reloc offset, reloc_name, symbol+addend. */
3907 s_reloc (int ignore ATTRIBUTE_UNUSED)
3914 struct reloc_list *reloc;
3916 reloc = (struct reloc_list *) xmalloc (sizeof (*reloc));
3919 stop = mri_comment_field (&stopc);
3928 as_bad (_("missing or bad offset expression"));
3931 exp.X_add_symbol = section_symbol (now_seg);
3932 exp.X_op = O_symbol;
3935 if (exp.X_add_number == 0)
3937 reloc->u.a.offset_sym = exp.X_add_symbol;
3942 reloc->u.a.offset_sym = make_expr_symbol (&exp);
3947 if (*input_line_pointer != ',')
3949 as_bad (_("missing reloc type"));
3953 ++input_line_pointer;
3955 r_name = input_line_pointer;
3956 c = get_symbol_end ();
3957 reloc->u.a.howto = bfd_reloc_name_lookup (stdoutput, r_name);
3958 *input_line_pointer = c;
3959 if (reloc->u.a.howto == NULL)
3961 as_bad (_("unrecognized reloc type"));
3965 exp.X_op = O_absent;
3967 if (*input_line_pointer == ',')
3969 ++input_line_pointer;
3977 as_bad (_("bad reloc expression"));
3979 ignore_rest_of_line ();
3982 mri_comment_end (stop, stopc);
3985 reloc->u.a.sym = NULL;
3986 reloc->u.a.addend = 0;
3989 reloc->u.a.sym = NULL;
3990 reloc->u.a.addend = exp.X_add_number;
3993 reloc->u.a.sym = exp.X_add_symbol;
3994 reloc->u.a.addend = exp.X_add_number;
3997 reloc->u.a.sym = make_expr_symbol (&exp);
3998 reloc->u.a.addend = 0;
4002 as_where (&reloc->file, &reloc->line);
4003 reloc->next = reloc_list;
4006 demand_empty_rest_of_line ();
4008 mri_comment_end (stop, stopc);
4011 /* Put the contents of expression EXP into the object file using
4012 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
4015 emit_expr (expressionS *exp, unsigned int nbytes)
4019 valueT extra_digit = 0;
4021 /* Don't do anything if we are going to make another pass. */
4025 /* Grow the current frag now so that dot_value does not get invalidated
4026 if the frag were to fill up in the frag_more() call below. */
4028 dot_value = frag_now_fix ();
4032 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
4033 appear as a four byte positive constant in the .line section,
4034 followed by a 2 byte 0xffff. Look for that case here. */
4036 static int dwarf_line = -1;
4038 if (strcmp (segment_name (now_seg), ".line") != 0)
4040 else if (dwarf_line >= 0
4042 && exp->X_op == O_constant
4043 && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
4044 listing_source_line ((unsigned int) dwarf_line);
4045 else if (nbytes == 4
4046 && exp->X_op == O_constant
4047 && exp->X_add_number >= 0)
4048 dwarf_line = exp->X_add_number;
4053 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
4054 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
4055 AT_sibling (0x12) followed by a four byte address of the sibling
4056 followed by a 2 byte AT_name (0x38) followed by the name of the
4057 file. We look for that case here. */
4059 static int dwarf_file = 0;
4061 if (strcmp (segment_name (now_seg), ".debug") != 0)
4063 else if (dwarf_file == 0
4065 && exp->X_op == O_constant
4066 && exp->X_add_number == 0x11)
4068 else if (dwarf_file == 1
4070 && exp->X_op == O_constant
4071 && exp->X_add_number == 0x12)
4073 else if (dwarf_file == 2
4076 else if (dwarf_file == 3
4078 && exp->X_op == O_constant
4079 && exp->X_add_number == 0x38)
4084 /* The variable dwarf_file_string tells stringer that the string
4085 may be the name of the source file. */
4086 if (dwarf_file == 4)
4087 dwarf_file_string = 1;
4089 dwarf_file_string = 0;
4094 if (check_eh_frame (exp, &nbytes))
4099 /* Allow `.word 0' in the absolute section. */
4100 if (now_seg == absolute_section)
4102 if (op != O_constant || exp->X_add_number != 0)
4103 as_bad (_("attempt to store value in absolute section"));
4104 abs_section_offset += nbytes;
4108 /* Handle a negative bignum. */
4110 && exp->X_add_number == 0
4111 && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
4112 && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
4115 unsigned long carry;
4117 exp = symbol_get_value_expression (exp->X_add_symbol);
4119 /* Negate the bignum: one's complement each digit and add 1. */
4121 for (i = 0; i < exp->X_add_number; i++)
4125 next = (((~(generic_bignum[i] & LITTLENUM_MASK))
4128 generic_bignum[i] = next & LITTLENUM_MASK;
4129 carry = next >> LITTLENUM_NUMBER_OF_BITS;
4132 /* We can ignore any carry out, because it will be handled by
4133 extra_digit if it is needed. */
4135 extra_digit = (valueT) -1;
4139 if (op == O_absent || op == O_illegal)
4141 as_warn (_("zero assumed for missing expression"));
4142 exp->X_add_number = 0;
4145 else if (op == O_big && exp->X_add_number <= 0)
4147 as_bad (_("floating point number invalid"));
4148 exp->X_add_number = 0;
4151 else if (op == O_register)
4153 as_warn (_("register value used as expression"));
4157 p = frag_more ((int) nbytes);
4159 #ifndef WORKING_DOT_WORD
4160 /* If we have the difference of two symbols in a word, save it on
4161 the broken_words list. See the code in write.c. */
4162 if (op == O_subtract && nbytes == 2)
4164 struct broken_word *x;
4166 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
4167 x->next_broken_word = broken_words;
4170 x->subseg = now_subseg;
4172 x->word_goes_here = p;
4174 x->add = exp->X_add_symbol;
4175 x->sub = exp->X_op_symbol;
4176 x->addnum = exp->X_add_number;
4184 /* If we have an integer, but the number of bytes is too large to
4185 pass to md_number_to_chars, handle it as a bignum. */
4186 if (op == O_constant && nbytes > sizeof (valueT))
4188 extra_digit = exp->X_unsigned ? 0 : -1;
4189 convert_to_bignum (exp);
4193 if (op == O_constant)
4195 register valueT get;
4196 register valueT use;
4197 register valueT mask;
4199 register valueT unmask;
4201 /* JF << of >= number of bits in the object is undefined. In
4202 particular SPARC (Sun 4) has problems. */
4203 if (nbytes >= sizeof (valueT))
4206 if (nbytes > sizeof (valueT))
4209 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
4213 /* Don't store these bits. */
4214 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
4215 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
4218 unmask = ~mask; /* Do store these bits. */
4221 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
4222 mask = ~(unmask >> 1); /* Includes sign bit now. */
4225 get = exp->X_add_number;
4227 if ((get & mask) != 0
4228 && ((get & mask) != mask
4229 || (get & hibit) == 0))
4230 { /* Leading bits contain both 0s & 1s. */
4231 #if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG
4233 as_warn (_("value 0x%llx truncated to 0x%llx"),
4234 (unsigned long long) get, (unsigned long long) use);
4236 as_warn (_("value 0x%I64x truncated to 0x%I64x"),
4237 (unsigned long long) get, (unsigned long long) use);
4240 as_warn (_("value 0x%lx truncated to 0x%lx"),
4241 (unsigned long) get, (unsigned long) use);
4244 /* Put bytes in right order. */
4245 md_number_to_chars (p, use, (int) nbytes);
4247 else if (op == O_big)
4250 LITTLENUM_TYPE *nums;
4252 know (nbytes % CHARS_PER_LITTLENUM == 0);
4254 size = exp->X_add_number * CHARS_PER_LITTLENUM;
4257 as_warn (_("bignum truncated to %d bytes"), nbytes);
4261 if (target_big_endian)
4263 while (nbytes > size)
4265 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
4266 nbytes -= CHARS_PER_LITTLENUM;
4267 p += CHARS_PER_LITTLENUM;
4270 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
4271 while (size >= CHARS_PER_LITTLENUM)
4274 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
4275 size -= CHARS_PER_LITTLENUM;
4276 p += CHARS_PER_LITTLENUM;
4281 nums = generic_bignum;
4282 while (size >= CHARS_PER_LITTLENUM)
4284 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
4286 size -= CHARS_PER_LITTLENUM;
4287 p += CHARS_PER_LITTLENUM;
4288 nbytes -= CHARS_PER_LITTLENUM;
4291 while (nbytes >= CHARS_PER_LITTLENUM)
4293 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
4294 nbytes -= CHARS_PER_LITTLENUM;
4295 p += CHARS_PER_LITTLENUM;
4300 emit_expr_fix (exp, nbytes, frag_now, p);
4304 emit_expr_fix (expressionS *exp, unsigned int nbytes, fragS *frag, char *p)
4306 memset (p, 0, nbytes);
4308 /* Generate a fixS to record the symbol value. */
4310 #ifdef TC_CONS_FIX_NEW
4311 TC_CONS_FIX_NEW (frag, p - frag->fr_literal, nbytes, exp);
4314 bfd_reloc_code_real_type r;
4334 as_bad (_("unsupported BFD relocation size %u"), nbytes);
4338 fix_new_exp (frag, p - frag->fr_literal, (int) nbytes, exp,
4344 #ifdef BITFIELD_CONS_EXPRESSIONS
4346 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
4347 w:x,y:z, where w and y are bitwidths and x and y are values. They
4348 then pack them all together. We do a little better in that we allow
4349 them in words, longs, etc. and we'll pack them in target byte order
4352 The rules are: pack least significant bit first, if a field doesn't
4353 entirely fit, put it in the next unit. Overflowing the bitfield is
4354 explicitly *not* even a warning. The bitwidth should be considered
4357 To use this function the tc-XXX.h file should define
4358 BITFIELD_CONS_EXPRESSIONS. */
4361 parse_bitfield_cons (exp, nbytes)
4363 unsigned int nbytes;
4365 unsigned int bits_available = BITS_PER_CHAR * nbytes;
4366 char *hold = input_line_pointer;
4368 (void) expression (exp);
4370 if (*input_line_pointer == ':')
4377 unsigned long width;
4379 if (*input_line_pointer != ':')
4381 input_line_pointer = hold;
4383 } /* Next piece is not a bitfield. */
4385 /* In the general case, we can't allow
4386 full expressions with symbol
4387 differences and such. The relocation
4388 entries for symbols not defined in this
4389 assembly would require arbitrary field
4390 widths, positions, and masks which most
4391 of our current object formats don't
4394 In the specific case where a symbol
4395 *is* defined in this assembly, we
4396 *could* build fixups and track it, but
4397 this could lead to confusion for the
4398 backends. I'm lazy. I'll take any
4399 SEG_ABSOLUTE. I think that means that
4400 you can use a previous .set or
4401 .equ type symbol. xoxorich. */
4403 if (exp->X_op == O_absent)
4405 as_warn (_("using a bit field width of zero"));
4406 exp->X_add_number = 0;
4407 exp->X_op = O_constant;
4408 } /* Implied zero width bitfield. */
4410 if (exp->X_op != O_constant)
4412 *input_line_pointer = '\0';
4413 as_bad (_("field width \"%s\" too complex for a bitfield"), hold);
4414 *input_line_pointer = ':';
4415 demand_empty_rest_of_line ();
4417 } /* Too complex. */
4419 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
4421 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4422 width, nbytes, (BITS_PER_CHAR * nbytes));
4423 width = BITS_PER_CHAR * nbytes;
4426 if (width > bits_available)
4428 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4429 input_line_pointer = hold;
4430 exp->X_add_number = value;
4435 hold = ++input_line_pointer;
4437 (void) expression (exp);
4438 if (exp->X_op != O_constant)
4440 char cache = *input_line_pointer;
4442 *input_line_pointer = '\0';
4443 as_bad (_("field value \"%s\" too complex for a bitfield"), hold);
4444 *input_line_pointer = cache;
4445 demand_empty_rest_of_line ();
4447 } /* Too complex. */
4449 value |= ((~(-1 << width) & exp->X_add_number)
4450 << ((BITS_PER_CHAR * nbytes) - bits_available));
4452 if ((bits_available -= width) == 0
4453 || is_it_end_of_statement ()
4454 || *input_line_pointer != ',')
4457 } /* All the bitfields we're gonna get. */
4459 hold = ++input_line_pointer;
4460 (void) expression (exp);
4463 exp->X_add_number = value;
4464 exp->X_op = O_constant;
4465 exp->X_unsigned = 1;
4469 #endif /* BITFIELD_CONS_EXPRESSIONS */
4471 /* Handle an MRI style string expression. */
4475 parse_mri_cons (exp, nbytes)
4477 unsigned int nbytes;
4479 if (*input_line_pointer != '\''
4480 && (input_line_pointer[1] != '\''
4481 || (*input_line_pointer != 'A'
4482 && *input_line_pointer != 'E')))
4483 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
4487 unsigned int result = 0;
4489 /* An MRI style string. Cut into as many bytes as will fit into
4490 a nbyte chunk, left justify if necessary, and separate with
4491 commas so we can try again later. */
4492 if (*input_line_pointer == 'A')
4493 ++input_line_pointer;
4494 else if (*input_line_pointer == 'E')
4496 as_bad (_("EBCDIC constants are not supported"));
4497 ++input_line_pointer;
4500 input_line_pointer++;
4501 for (scan = 0; scan < nbytes; scan++)
4503 if (*input_line_pointer == '\'')
4505 if (input_line_pointer[1] == '\'')
4507 input_line_pointer++;
4512 result = (result << 8) | (*input_line_pointer++);
4516 while (scan < nbytes)
4522 /* Create correct expression. */
4523 exp->X_op = O_constant;
4524 exp->X_add_number = result;
4526 /* Fake it so that we can read the next char too. */
4527 if (input_line_pointer[0] != '\'' ||
4528 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
4530 input_line_pointer -= 2;
4531 input_line_pointer[0] = ',';
4532 input_line_pointer[1] = '\'';
4535 input_line_pointer++;
4538 #endif /* TC_M68K */
4540 #ifdef REPEAT_CONS_EXPRESSIONS
4542 /* Parse a repeat expression for cons. This is used by the MIPS
4543 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4544 object file COUNT times.
4546 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4549 parse_repeat_cons (exp, nbytes)
4551 unsigned int nbytes;
4558 if (*input_line_pointer != ':')
4560 /* No repeat count. */
4564 ++input_line_pointer;
4565 expression (&count);
4566 if (count.X_op != O_constant
4567 || count.X_add_number <= 0)
4569 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4573 /* The cons function is going to output this expression once. So we
4574 output it count - 1 times. */
4575 for (i = count.X_add_number - 1; i > 0; i--)
4576 emit_expr (exp, nbytes);
4579 #endif /* REPEAT_CONS_EXPRESSIONS */
4581 /* Parse a floating point number represented as a hex constant. This
4582 permits users to specify the exact bits they want in the floating
4586 hex_float (int float_type, char *bytes)
4618 as_bad (_("unknown floating type type '%c'"), float_type);
4622 /* It would be nice if we could go through expression to parse the
4623 hex constant, but if we get a bignum it's a pain to sort it into
4624 the buffer correctly. */
4626 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
4630 /* The MRI assembler accepts arbitrary underscores strewn about
4631 through the hex constant, so we ignore them as well. */
4632 if (*input_line_pointer == '_')
4634 ++input_line_pointer;
4640 as_warn (_("floating point constant too large"));
4643 d = hex_value (*input_line_pointer) << 4;
4644 ++input_line_pointer;
4645 while (*input_line_pointer == '_')
4646 ++input_line_pointer;
4647 if (hex_p (*input_line_pointer))
4649 d += hex_value (*input_line_pointer);
4650 ++input_line_pointer;
4652 if (target_big_endian)
4655 bytes[length - i - 1] = d;
4661 if (target_big_endian)
4662 memset (bytes + i, 0, length - i);
4664 memset (bytes, 0, length - i);
4672 CONStruct some more frag chars of .floats .ffloats etc.
4673 Makes 0 or more new frags.
4674 If need_pass_2 == 1, no frags are emitted.
4675 This understands only floating literals, not expressions. Sorry.
4677 A floating constant is defined by atof_generic(), except it is preceded
4678 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4679 reading, I decided to be incompatible. This always tries to give you
4680 rounded bits to the precision of the pseudo-op. Former AS did premature
4681 truncation, restored noisy bits instead of trailing 0s AND gave you
4682 a choice of 2 flavours of noise according to which of 2 floating-point
4683 scanners you directed AS to use.
4685 In: input_line_pointer->whitespace before, or '0' of flonum. */
4688 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4689 register int float_type /* 'f':.ffloat ... 'F':.float ... */)
4692 int length; /* Number of chars in an object. */
4693 register char *err; /* Error from scanning floating literal. */
4694 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
4696 if (is_it_end_of_statement ())
4698 demand_empty_rest_of_line ();
4702 #ifdef md_flush_pending_output
4703 md_flush_pending_output ();
4706 #ifdef md_cons_align
4712 /* input_line_pointer->1st char of a flonum (we hope!). */
4715 /* Skip any 0{letter} that may be present. Don't even check if the
4716 letter is legal. Someone may invent a "z" format and this routine
4717 has no use for such information. Lusers beware: you get
4718 diagnostics if your input is ill-conditioned. */
4719 if (input_line_pointer[0] == '0'
4720 && ISALPHA (input_line_pointer[1]))
4721 input_line_pointer += 2;
4723 /* Accept :xxxx, where the x's are hex digits, for a floating
4724 point with the exact digits specified. */
4725 if (input_line_pointer[0] == ':')
4727 ++input_line_pointer;
4728 length = hex_float (float_type, temp);
4731 ignore_rest_of_line ();
4737 err = md_atof (float_type, temp, &length);
4738 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
4739 know (err != NULL || length > 0);
4742 as_bad (_("bad floating literal: %s"), err);
4743 ignore_rest_of_line ();
4754 #ifdef REPEAT_CONS_EXPRESSIONS
4755 if (*input_line_pointer == ':')
4757 expressionS count_exp;
4759 ++input_line_pointer;
4760 expression (&count_exp);
4762 if (count_exp.X_op != O_constant
4763 || count_exp.X_add_number <= 0)
4764 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4766 count = count_exp.X_add_number;
4770 while (--count >= 0)
4772 p = frag_more (length);
4773 memcpy (p, temp, (unsigned int) length);
4778 while (*input_line_pointer++ == ',');
4780 /* Put terminator back into stream. */
4781 --input_line_pointer;
4782 demand_empty_rest_of_line ();
4785 /* Return the size of a LEB128 value. */
4788 sizeof_sleb128 (offsetT value)
4790 register int size = 0;
4791 register unsigned byte;
4795 byte = (value & 0x7f);
4796 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4797 Fortunately, we can structure things so that the extra work reduces
4798 to a noop on systems that do things "properly". */
4799 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4802 while (!(((value == 0) && ((byte & 0x40) == 0))
4803 || ((value == -1) && ((byte & 0x40) != 0))));
4809 sizeof_uleb128 (valueT value)
4811 register int size = 0;
4812 register unsigned byte;
4816 byte = (value & 0x7f);
4826 sizeof_leb128 (valueT value, int sign)
4829 return sizeof_sleb128 ((offsetT) value);
4831 return sizeof_uleb128 (value);
4834 /* Output a LEB128 value. */
4837 output_sleb128 (char *p, offsetT value)
4839 register char *orig = p;
4844 unsigned byte = (value & 0x7f);
4846 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4847 Fortunately, we can structure things so that the extra work reduces
4848 to a noop on systems that do things "properly". */
4849 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4851 more = !((((value == 0) && ((byte & 0x40) == 0))
4852 || ((value == -1) && ((byte & 0x40) != 0))));
4864 output_uleb128 (char *p, valueT value)
4870 unsigned byte = (value & 0x7f);
4873 /* More bytes to follow. */
4884 output_leb128 (char *p, valueT value, int sign)
4887 return output_sleb128 (p, (offsetT) value);
4889 return output_uleb128 (p, value);
4892 /* Do the same for bignums. We combine sizeof with output here in that
4893 we don't output for NULL values of P. It isn't really as critical as
4894 for "normal" values that this be streamlined. */
4897 output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
4904 /* Strip leading sign extensions off the bignum. */
4906 && bignum[size - 1] == LITTLENUM_MASK
4907 && bignum[size - 2] > LITTLENUM_MASK / 2)
4912 /* OR in the next part of the littlenum. */
4913 val |= (*bignum << loaded);
4914 loaded += LITTLENUM_NUMBER_OF_BITS;
4918 /* Add bytes until there are less than 7 bits left in VAL
4919 or until every non-sign bit has been written. */
4926 || val != ((byte & 0x40) == 0 ? 0 : ((valueT) 1 << loaded) - 1))
4933 while ((byte & 0x80) != 0 && loaded >= 7);
4937 /* Mop up any left-over bits (of which there will be less than 7). */
4938 if ((byte & 0x80) != 0)
4940 /* Sign-extend VAL. */
4941 if (val & (1 << (loaded - 1)))
4942 val |= ~0 << loaded;
4952 output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
4959 /* Strip leading zeros off the bignum. */
4960 /* XXX: Is this needed? */
4961 while (size > 0 && bignum[size - 1] == 0)
4966 if (loaded < 7 && size > 0)
4968 val |= (*bignum << loaded);
4969 loaded += 8 * CHARS_PER_LITTLENUM;
4978 if (size > 0 || val)
4985 while (byte & 0x80);
4991 output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, int size, int sign)
4994 return output_big_sleb128 (p, bignum, size);
4996 return output_big_uleb128 (p, bignum, size);
4999 /* Generate the appropriate fragments for a given expression to emit a
5003 emit_leb128_expr (expressionS *exp, int sign)
5005 operatorT op = exp->X_op;
5006 unsigned int nbytes;
5008 if (op == O_absent || op == O_illegal)
5010 as_warn (_("zero assumed for missing expression"));
5011 exp->X_add_number = 0;
5014 else if (op == O_big && exp->X_add_number <= 0)
5016 as_bad (_("floating point number invalid"));
5017 exp->X_add_number = 0;
5020 else if (op == O_register)
5022 as_warn (_("register value used as expression"));
5025 else if (op == O_constant
5027 && (exp->X_add_number < 0) != !exp->X_unsigned)
5029 /* We're outputting a signed leb128 and the sign of X_add_number
5030 doesn't reflect the sign of the original value. Convert EXP
5031 to a correctly-extended bignum instead. */
5032 convert_to_bignum (exp);
5036 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
5037 a signal that this is leb128 data. It shouldn't optimize this away. */
5038 nbytes = (unsigned int) -1;
5039 if (check_eh_frame (exp, &nbytes))
5042 /* Let the backend know that subsequent data may be byte aligned. */
5043 #ifdef md_cons_align
5047 if (op == O_constant)
5049 /* If we've got a constant, emit the thing directly right now. */
5051 valueT value = exp->X_add_number;
5055 size = sizeof_leb128 (value, sign);
5056 p = frag_more (size);
5057 output_leb128 (p, value, sign);
5059 else if (op == O_big)
5061 /* O_big is a different sort of constant. */
5066 size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
5067 p = frag_more (size);
5068 output_big_leb128 (p, generic_bignum, exp->X_add_number, sign);
5072 /* Otherwise, we have to create a variable sized fragment and
5073 resolve things later. */
5075 frag_var (rs_leb128, sizeof_uleb128 (~(valueT) 0), 0, sign,
5076 make_expr_symbol (exp), 0, (char *) NULL);
5080 /* Parse the .sleb128 and .uleb128 pseudos. */
5087 #ifdef md_flush_pending_output
5088 md_flush_pending_output ();
5094 emit_leb128_expr (&exp, sign);
5096 while (*input_line_pointer++ == ',');
5098 input_line_pointer--;
5099 demand_empty_rest_of_line ();
5103 stringer_append_char (int c, int bitsize)
5105 if (!target_big_endian)
5106 FRAG_APPEND_1_CHAR (c);
5111 FRAG_APPEND_1_CHAR (0);
5112 FRAG_APPEND_1_CHAR (0);
5113 FRAG_APPEND_1_CHAR (0);
5114 FRAG_APPEND_1_CHAR (0);
5117 FRAG_APPEND_1_CHAR (0);
5118 FRAG_APPEND_1_CHAR (0);
5121 FRAG_APPEND_1_CHAR (0);
5126 /* Called with invalid bitsize argument. */
5130 if (target_big_endian)
5131 FRAG_APPEND_1_CHAR (c);
5134 /* Worker to do .ascii etc statements.
5135 Reads 0 or more ',' separated, double-quoted strings.
5136 Caller should have checked need_pass_2 is FALSE because we don't
5138 Checks for end-of-line.
5139 BITS_APPENDZERO says how many bits are in a target char.
5140 The bottom bit is set if a NUL char should be appended to the strings. */
5143 stringer (int bits_appendzero)
5145 const int bitsize = bits_appendzero & ~7;
5146 const int append_zero = bits_appendzero & 1;
5150 #ifdef md_flush_pending_output
5151 md_flush_pending_output ();
5154 #ifdef md_cons_align
5158 /* The following awkward logic is to parse ZERO or more strings,
5159 comma separated. Recall a string expression includes spaces
5160 before the opening '\"' and spaces after the closing '\"'.
5161 We fake a leading ',' if there is (supposed to be)
5162 a 1st, expression. We keep demanding expressions for each ','. */
5163 if (is_it_end_of_statement ())
5165 c = 0; /* Skip loop. */
5166 ++input_line_pointer; /* Compensate for end of loop. */
5170 c = ','; /* Do loop. */
5172 /* If we have been switched into the abs_section then we
5173 will not have an obstack onto which we can hang strings. */
5174 if (now_seg == absolute_section)
5176 as_bad (_("strings must be placed into a section"));
5178 ignore_rest_of_line ();
5181 while (c == ',' || c == '<' || c == '"')
5184 switch (*input_line_pointer)
5187 ++input_line_pointer; /*->1st char of string. */
5188 start = input_line_pointer;
5190 while (is_a_char (c = next_char_of_string ()))
5191 stringer_append_char (c, bitsize);
5194 stringer_append_char (0, bitsize);
5196 know (input_line_pointer[-1] == '\"');
5200 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
5201 will emit .string with a filename in the .debug section
5202 after a sequence of constants. See the comment in
5203 emit_expr for the sequence. emit_expr will set
5204 dwarf_file_string to non-zero if this string might be a
5205 source file name. */
5206 if (strcmp (segment_name (now_seg), ".debug") != 0)
5207 dwarf_file_string = 0;
5208 else if (dwarf_file_string)
5210 c = input_line_pointer[-1];
5211 input_line_pointer[-1] = '\0';
5212 listing_source_file (start);
5213 input_line_pointer[-1] = c;
5220 input_line_pointer++;
5221 c = get_single_number ();
5222 stringer_append_char (c, bitsize);
5223 if (*input_line_pointer != '>')
5224 as_bad (_("expected <nn>"));
5226 input_line_pointer++;
5229 input_line_pointer++;
5233 c = *input_line_pointer;
5236 demand_empty_rest_of_line ();
5239 /* FIXME-SOMEDAY: I had trouble here on characters with the
5240 high bits set. We'll probably also have trouble with
5241 multibyte chars, wide chars, etc. Also be careful about
5242 returning values bigger than 1 byte. xoxorich. */
5245 next_char_of_string (void)
5247 register unsigned int c;
5249 c = *input_line_pointer++ & CHAR_MASK;
5257 as_warn (_("unterminated string; newline inserted"));
5258 bump_line_counters ();
5261 #ifndef NO_STRING_ESCAPES
5263 switch (c = *input_line_pointer++)
5291 break; /* As itself. */
5307 for (i = 0, number = 0;
5308 ISDIGIT (c) && i < 3;
5309 c = *input_line_pointer++, i++)
5311 number = number * 8 + c - '0';
5316 --input_line_pointer;
5325 c = *input_line_pointer++;
5326 while (ISXDIGIT (c))
5329 number = number * 16 + c - '0';
5330 else if (ISUPPER (c))
5331 number = number * 16 + c - 'A' + 10;
5333 number = number * 16 + c - 'a' + 10;
5334 c = *input_line_pointer++;
5337 --input_line_pointer;
5342 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
5343 as_warn (_("unterminated string; newline inserted"));
5345 bump_line_counters ();
5350 #ifdef ONLY_STANDARD_ESCAPES
5351 as_bad (_("bad escaped character in string"));
5353 #endif /* ONLY_STANDARD_ESCAPES */
5358 #endif /* ! defined (NO_STRING_ESCAPES) */
5367 get_segmented_expression (register expressionS *expP)
5369 register segT retval;
5371 retval = expression (expP);
5372 if (expP->X_op == O_illegal
5373 || expP->X_op == O_absent
5374 || expP->X_op == O_big)
5376 as_bad (_("expected address expression"));
5377 expP->X_op = O_constant;
5378 expP->X_add_number = 0;
5379 retval = absolute_section;
5385 get_known_segmented_expression (register expressionS *expP)
5387 register segT retval;
5389 if ((retval = get_segmented_expression (expP)) == undefined_section)
5391 /* There is no easy way to extract the undefined symbol from the
5393 if (expP->X_add_symbol != NULL
5394 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
5395 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5396 S_GET_NAME (expP->X_add_symbol));
5398 as_warn (_("some symbol undefined; zero assumed"));
5399 retval = absolute_section;
5400 expP->X_op = O_constant;
5401 expP->X_add_number = 0;
5403 know (retval == absolute_section || SEG_NORMAL (retval));
5407 char /* Return terminator. */
5408 get_absolute_expression_and_terminator (long *val_pointer /* Return value of expression. */)
5410 /* FIXME: val_pointer should probably be offsetT *. */
5411 *val_pointer = (long) get_absolute_expression ();
5412 return (*input_line_pointer++);
5415 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
5416 Give a warning if that happens. */
5419 demand_copy_C_string (int *len_pointer)
5423 if ((s = demand_copy_string (len_pointer)) != 0)
5427 for (len = *len_pointer; len > 0; len--)
5434 as_bad (_("this string may not contain \'\\0\'"));
5442 /* Demand string, but return a safe (=private) copy of the string.
5443 Return NULL if we can't read a string here. */
5446 demand_copy_string (int *lenP)
5448 register unsigned int c;
5454 if (*input_line_pointer == '\"')
5456 input_line_pointer++; /* Skip opening quote. */
5458 while (is_a_char (c = next_char_of_string ()))
5460 obstack_1grow (¬es, c);
5463 /* JF this next line is so demand_copy_C_string will return a
5464 null terminated string. */
5465 obstack_1grow (¬es, '\0');
5466 retval = (char *) obstack_finish (¬es);
5470 as_bad (_("missing string"));
5472 ignore_rest_of_line ();
5478 /* In: Input_line_pointer->next character.
5480 Do: Skip input_line_pointer over all whitespace.
5482 Out: 1 if input_line_pointer->end-of-line. */
5485 is_it_end_of_statement (void)
5488 return (is_end_of_line[(unsigned char) *input_line_pointer]);
5492 equals (char *sym_name, int reassign)
5497 input_line_pointer++;
5498 if (*input_line_pointer == '=')
5499 input_line_pointer++;
5500 if (reassign < 0 && *input_line_pointer == '=')
5501 input_line_pointer++;
5503 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
5504 input_line_pointer++;
5507 stop = mri_comment_field (&stopc);
5509 assign_symbol (sym_name, reassign >= 0 ? !reassign : reassign);
5513 demand_empty_rest_of_line ();
5514 mri_comment_end (stop, stopc);
5518 /* .incbin -- include a file verbatim at the current location. */
5521 s_incbin (int x ATTRIBUTE_UNUSED)
5532 #ifdef md_flush_pending_output
5533 md_flush_pending_output ();
5536 #ifdef md_cons_align
5541 filename = demand_copy_string (& len);
5542 if (filename == NULL)
5547 /* Look for optional skip and count. */
5548 if (* input_line_pointer == ',')
5550 ++ input_line_pointer;
5551 skip = get_absolute_expression ();
5555 if (* input_line_pointer == ',')
5557 ++ input_line_pointer;
5559 count = get_absolute_expression ();
5561 as_warn (_(".incbin count zero, ignoring `%s'"), filename);
5567 demand_empty_rest_of_line ();
5569 /* Try opening absolute path first, then try include dirs. */
5570 binfile = fopen (filename, FOPEN_RB);
5571 if (binfile == NULL)
5575 path = (char *) xmalloc ((unsigned long) len + include_dir_maxlen + 5);
5577 for (i = 0; i < include_dir_count; i++)
5579 sprintf (path, "%s/%s", include_dirs[i], filename);
5581 binfile = fopen (path, FOPEN_RB);
5582 if (binfile != NULL)
5586 if (binfile == NULL)
5587 as_bad (_("file not found: %s"), filename);
5590 path = xstrdup (filename);
5596 register_dependency (path);
5598 /* Compute the length of the file. */
5599 if (fseek (binfile, 0, SEEK_END) != 0)
5601 as_bad (_("seek to end of .incbin file failed `%s'"), path);
5604 file_len = ftell (binfile);
5606 /* If a count was not specified use the remainder of the file. */
5608 count = file_len - skip;
5610 if (skip < 0 || count < 0 || file_len < 0 || skip + count > file_len)
5612 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5613 skip, count, file_len);
5617 if (fseek (binfile, skip, SEEK_SET) != 0)
5619 as_bad (_("could not skip to %ld in file `%s'"), skip, path);
5623 /* Allocate frag space and store file contents in it. */
5624 binfrag = frag_more (count);
5626 bytes = fread (binfrag, 1, count, binfile);
5628 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5629 path, bytes, count);
5632 if (binfile != NULL)
5638 /* .include -- include a file at this point. */
5641 s_include (int arg ATTRIBUTE_UNUSED)
5650 filename = demand_copy_string (&i);
5651 if (filename == NULL)
5653 /* demand_copy_string has already printed an error and
5654 called ignore_rest_of_line. */
5662 while (!is_end_of_line[(unsigned char) *input_line_pointer]
5663 && *input_line_pointer != ' '
5664 && *input_line_pointer != '\t')
5666 obstack_1grow (¬es, *input_line_pointer);
5667 ++input_line_pointer;
5671 obstack_1grow (¬es, '\0');
5672 filename = (char *) obstack_finish (¬es);
5673 while (!is_end_of_line[(unsigned char) *input_line_pointer])
5674 ++input_line_pointer;
5677 demand_empty_rest_of_line ();
5678 path = (char *) xmalloc ((unsigned long) i
5679 + include_dir_maxlen + 5 /* slop */ );
5681 for (i = 0; i < include_dir_count; i++)
5683 strcpy (path, include_dirs[i]);
5685 strcat (path, filename);
5686 if (0 != (try_file = fopen (path, FOPEN_RT)))
5696 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5697 register_dependency (path);
5698 input_scrub_insert_file (path);
5702 add_include_dir (char *path)
5706 if (include_dir_count == 0)
5708 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
5709 include_dirs[0] = "."; /* Current dir. */
5710 include_dir_count = 2;
5714 include_dir_count++;
5716 (char **) realloc (include_dirs,
5717 include_dir_count * sizeof (*include_dirs));
5720 include_dirs[include_dir_count - 1] = path; /* New one. */
5723 if (i > include_dir_maxlen)
5724 include_dir_maxlen = i;
5727 /* Output debugging information to denote the source file. */
5730 generate_file_debug (void)
5732 if (debug_type == DEBUG_STABS)
5733 stabs_generate_asm_file ();
5736 /* Output line number debugging information for the current source line. */
5739 generate_lineno_debug (void)
5743 case DEBUG_UNSPECIFIED:
5748 stabs_generate_asm_lineno ();
5751 ecoff_generate_asm_lineno ();
5754 /* ??? We could here indicate to dwarf2dbg.c that something
5755 has changed. However, since there is additional backend
5756 support that is required (calling dwarf2_emit_insn), we
5757 let dwarf2dbg.c call as_where on its own. */
5762 /* Output debugging information to mark a function entry point or end point.
5763 END_P is zero for .func, and non-zero for .endfunc. */
5768 do_s_func (end_p, NULL);
5771 /* Subroutine of s_func so targets can choose a different default prefix.
5772 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5775 do_s_func (int end_p, const char *default_prefix)
5777 /* Record the current function so that we can issue an error message for
5778 misplaced .func,.endfunc, and also so that .endfunc needs no
5780 static char *current_name;
5781 static char *current_label;
5785 if (current_name == NULL)
5787 as_bad (_("missing .func"));
5788 ignore_rest_of_line ();
5792 if (debug_type == DEBUG_STABS)
5793 stabs_generate_asm_endfunc (current_name, current_label);
5795 current_name = current_label = NULL;
5800 char delim1, delim2;
5802 if (current_name != NULL)
5804 as_bad (_(".endfunc missing for previous .func"));
5805 ignore_rest_of_line ();
5809 name = input_line_pointer;
5810 delim1 = get_symbol_end ();
5811 name = xstrdup (name);
5812 *input_line_pointer = delim1;
5814 if (*input_line_pointer != ',')
5818 if (asprintf (&label, "%s%s", default_prefix, name) == -1)
5819 as_fatal ("%s", xstrerror (errno));
5823 char leading_char = bfd_get_symbol_leading_char (stdoutput);
5824 /* Missing entry point, use function's name with the leading
5828 if (asprintf (&label, "%c%s", leading_char, name) == -1)
5829 as_fatal ("%s", xstrerror (errno));
5837 ++input_line_pointer;
5839 label = input_line_pointer;
5840 delim2 = get_symbol_end ();
5841 label = xstrdup (label);
5842 *input_line_pointer = delim2;
5845 if (debug_type == DEBUG_STABS)
5846 stabs_generate_asm_func (name, label);
5848 current_name = name;
5849 current_label = label;
5852 demand_empty_rest_of_line ();
5856 s_ignore (int arg ATTRIBUTE_UNUSED)
5858 ignore_rest_of_line ();
5862 read_print_statistics (FILE *file)
5864 hash_print_statistics (file, "pseudo-op table", po_hash);
5867 /* Inserts the given line into the input stream.
5869 This call avoids macro/conditionals nesting checking, since the contents of
5870 the line are assumed to replace the contents of a line already scanned.
5872 An appropriate use of this function would be substitution of input lines when
5873 called by md_start_line_hook(). The given line is assumed to already be
5874 properly scrubbed. */
5877 input_scrub_insert_line (const char *line)
5881 sb_add_string (&newline, line);
5882 input_scrub_include_sb (&newline, input_line_pointer, 0);
5884 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5887 /* Insert a file into the input stream; the path must resolve to an actual
5888 file; no include path searching or dependency registering is performed. */
5891 input_scrub_insert_file (char *path)
5893 input_scrub_include_file (path, input_line_pointer);
5894 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5897 /* Find the end of a line, considering quotation and escaping of quotes. */
5899 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5900 # define TC_SINGLE_QUOTE_STRINGS 1
5904 _find_end_of_line (char *s, int mri_string, int insn ATTRIBUTE_UNUSED,
5907 char inquote = '\0';
5910 while (!is_end_of_line[(unsigned char) *s]
5911 || (inquote && !ISCNTRL (*s))
5912 || (inquote == '\'' && flag_mri)
5913 #ifdef TC_EOL_IN_INSN
5914 || (insn && TC_EOL_IN_INSN (s))
5916 /* PR 6926: When we are parsing the body of a macro the sequence
5917 \@ is special - it refers to the invocation count. If the @
5918 character happens to be registered as a line-separator character
5919 by the target, then the is_end_of_line[] test above will have
5920 returned true, but we need to ignore the line separating
5921 semantics in this particular case. */
5922 || (in_macro && inescape && *s == '@')
5925 if (mri_string && *s == '\'')
5929 else if (*s == '\\')
5933 #ifdef TC_SINGLE_QUOTE_STRINGS
5934 || (TC_SINGLE_QUOTE_STRINGS && *s == '\'')
5941 as_warn (_("missing closing `%c'"), inquote);
5943 as_warn (_("stray `\\'"));
5948 find_end_of_line (char *s, int mri_string)
5950 return _find_end_of_line (s, mri_string, 0, 0);