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
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) (x == ':')
48 /* Set by the object-format or the target. */
49 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
50 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
55 else if ((SIZE) >= 4) \
57 else if ((SIZE) >= 2) \
65 char *input_line_pointer; /*->next char of source file to parse. */
67 #if BITS_PER_CHAR != 8
68 /* The following table is indexed by[(char)] and will break if
69 a char does not have exactly 256 states (hopefully 0:255!)! */
78 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
83 /* The Delta 68k assembler permits % inside label names. */
88 /* The PowerPC Windows NT assemblers permits ? inside label names. */
93 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
94 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
103 /* The Delta 68k assembler permits ~ at start of label names. */
107 /* Used by is_... macros. our ctype[]. */
108 char lex_type[256] = {
109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
110 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
111 0, 0, 0, LEX_HASH, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
112 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
113 LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
114 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
115 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
116 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */
117 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
118 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
119 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
120 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
121 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
122 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
123 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
124 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
128 Out: 1 if this character ends a line. */
129 char is_end_of_line[256] = {
131 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
133 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
135 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
136 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
137 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
140 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
141 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
142 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
143 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
144 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
145 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
146 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
147 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
148 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
152 #ifndef TC_CASE_SENSITIVE
153 char original_case_string[128];
156 /* Functions private to this file. */
158 static char *buffer; /* 1st char of each buffer of lines is here. */
159 static char *buffer_limit; /*->1 + last char in buffer. */
161 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
162 in the tc-<CPU>.h file. See the "Porting GAS" section of the
164 int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
166 /* Variables for handling include file directory table. */
168 /* Table of pointers to directories to search for .include's. */
171 /* How many are in the table. */
172 int include_dir_count;
174 /* Length of longest in table. */
175 int include_dir_maxlen = 1;
177 #ifndef WORKING_DOT_WORD
178 struct broken_word *broken_words;
179 int new_broken_words;
182 /* The current offset into the absolute section. We don't try to
183 build frags in the absolute section, since no data can be stored
184 there. We just keep track of the current offset. */
185 addressT abs_section_offset;
187 /* If this line had an MRI style label, it is stored in this variable.
188 This is used by some of the MRI pseudo-ops. */
191 /* This global variable is used to support MRI common sections. We
192 translate such sections into a common symbol. This variable is
193 non-NULL when we are in an MRI common section. */
194 symbolS *mri_common_symbol;
196 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
197 need to align to an even byte boundary unless the next pseudo-op is
198 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
200 static int mri_pending_align;
204 /* This variable is set to be non-zero if the next string we see might
205 be the name of the source file in DWARF debugging information. See
206 the comment in emit_expr for the format we look for. */
207 static int dwarf_file_string;
211 static void do_s_func (int end_p, const char *default_prefix);
212 static void do_align (int, char *, int, int);
213 static void s_align (int, int);
214 static void s_altmacro (int);
215 static void s_bad_end (int);
217 static void s_gnu_attribute (int);
219 static void s_reloc (int);
220 static int hex_float (int, char *);
221 static segT get_known_segmented_expression (expressionS * expP);
222 static void pobegin (void);
223 static int get_line_sb (sb *);
224 static void generate_file_debug (void);
225 static char *_find_end_of_line (char *, int, int);
233 obj_read_begin_hook ();
235 /* Something close -- but not too close -- to a multiple of 1024.
236 The debugging malloc I'm using has 24 bytes of overhead. */
237 obstack_begin (¬es, chunksize);
238 obstack_begin (&cond_obstack, chunksize);
240 /* Use machine dependent syntax. */
241 for (p = line_separator_chars; *p; p++)
242 is_end_of_line[(unsigned char) *p] = 1;
243 /* Use more. FIXME-SOMEDAY. */
249 #ifndef TC_ADDRESS_BYTES
250 #define TC_ADDRESS_BYTES address_bytes
255 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
256 contain an address. */
257 int n = (stdoutput->arch_info->bits_per_address - 1) / 8;
265 /* Set up pseudo-op tables. */
267 static struct hash_control *po_hash;
269 static const pseudo_typeS potable[] = {
270 {"abort", s_abort, 0},
271 {"align", s_align_ptwo, 0},
272 {"altmacro", s_altmacro, 1},
273 {"ascii", stringer, 8+0},
274 {"asciz", stringer, 8+1},
275 {"balign", s_align_bytes, 0},
276 {"balignw", s_align_bytes, -2},
277 {"balignl", s_align_bytes, -4},
281 {"common", s_mri_common, 0},
282 {"common.s", s_mri_common, 1},
285 #ifdef TC_ADDRESS_BYTES
289 {"dc.d", float_cons, 'd'},
291 {"dc.s", float_cons, 'f'},
293 {"dc.x", float_cons, 'x'},
295 {"dcb.b", s_space, 1},
296 {"dcb.d", s_float_space, 'd'},
297 {"dcb.l", s_space, 4},
298 {"dcb.s", s_float_space, 'f'},
299 {"dcb.w", s_space, 2},
300 {"dcb.x", s_float_space, 'x'},
302 {"ds.b", s_space, 1},
303 {"ds.d", s_space, 8},
304 {"ds.l", s_space, 4},
305 {"ds.p", s_space, 12},
306 {"ds.s", s_space, 4},
307 {"ds.w", s_space, 2},
308 {"ds.x", s_space, 12},
309 {"debug", s_ignore, 0},
314 {"double", float_cons, 'd'},
316 {"eject", listing_eject, 0}, /* Formfeed listing. */
318 {"elsec", s_else, 0},
319 {"elseif", s_elseif, (int) O_ne},
321 {"endc", s_endif, 0},
322 {"endfunc", s_func, 1},
323 {"endif", s_endif, 0},
324 {"endm", s_bad_end, 0},
325 {"endr", s_bad_end, 1},
331 {"error", s_errwarn, 1},
332 {"exitm", s_mexit, 0},
334 {"extern", s_ignore, 0}, /* We treat all undef as ext. */
335 {"appfile", s_app_file, 1},
336 {"appline", s_app_line, 1},
338 {"file", s_app_file, 0},
340 {"float", float_cons, 'f'},
341 {"format", s_ignore, 0},
343 {"global", s_globl, 0},
344 {"globl", s_globl, 0},
346 {"gnu_attribute", s_gnu_attribute, 0},
349 {"if", s_if, (int) O_ne},
352 {"ifdef", s_ifdef, 0},
353 {"ifeq", s_if, (int) O_eq},
354 {"ifeqs", s_ifeqs, 0},
355 {"ifge", s_if, (int) O_ge},
356 {"ifgt", s_if, (int) O_gt},
357 {"ifle", s_if, (int) O_le},
358 {"iflt", s_if, (int) O_lt},
361 {"ifndef", s_ifdef, 1},
362 {"ifne", s_if, (int) O_ne},
363 {"ifnes", s_ifeqs, 1},
364 {"ifnotdef", s_ifdef, 1},
365 {"incbin", s_incbin, 0},
366 {"include", s_include, 0},
372 {"lcomm", s_lcomm, 0},
373 {"lflags", listing_flags, 0}, /* Listing flags. */
374 {"linefile", s_app_line, 0},
375 {"linkonce", s_linkonce, 0},
376 {"list", listing_list, 1}, /* Turn listing on. */
377 {"llen", listing_psize, 1},
380 {"macro", s_macro, 0},
381 {"mexit", s_mexit, 0},
383 {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
384 {"name", s_ignore, 0},
385 {"noaltmacro", s_altmacro, 0},
386 {"noformat", s_ignore, 0},
387 {"nolist", listing_list, 0}, /* Turn listing off. */
388 {"nopage", listing_nopage, 0},
390 {"offset", s_struct, 0},
392 {"p2align", s_align_ptwo, 0},
393 {"p2alignw", s_align_ptwo, -2},
394 {"p2alignl", s_align_ptwo, -4},
395 {"page", listing_eject, 0},
396 {"plen", listing_psize, 0},
397 {"print", s_print, 0},
398 {"psize", listing_psize, 0}, /* Set paper size. */
399 {"purgem", s_purgem, 0},
401 {"reloc", s_reloc, 0},
405 {"sbttl", listing_title, 1}, /* Subtitle of listing. */
410 {"single", float_cons, 'f'},
412 {"space", s_space, 0},
413 {"skip", s_space, 0},
414 {"sleb128", s_leb128, 1},
415 {"spc", s_ignore, 0},
416 {"stabd", s_stab, 'd'},
417 {"stabn", s_stab, 'n'},
418 {"stabs", s_stab, 's'},
419 {"string", stringer, 8+1},
420 {"string8", stringer, 8+1},
421 {"string16", stringer, 16+1},
422 {"string32", stringer, 32+1},
423 {"string64", stringer, 64+1},
424 {"struct", s_struct, 0},
428 /* This is for gcc to use. It's only just been added (2/94), so gcc
429 won't be able to use it for a while -- probably a year or more.
430 But once this has been released, check with gcc maintainers
431 before deleting it or even changing the spelling. */
432 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
433 /* If we're folding case -- done for some targets, not necessarily
434 all -- the above string in an input file will be converted to
435 this one. Match it either way... */
436 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
438 {"title", listing_title, 0}, /* Listing title. */
439 {"ttl", listing_title, 0},
441 {"uleb128", s_leb128, 0},
445 {"xdef", s_globl, 0},
446 {"xref", s_ignore, 0},
447 {"xstabs", s_xstab, 's'},
448 {"warning", s_errwarn, 0},
449 {"weakref", s_weakref, 0},
451 {"zero", s_space, 0},
452 {NULL, NULL, 0} /* End sentinel. */
456 get_absolute_expr (expressionS *exp)
458 expression_and_evaluate (exp);
459 if (exp->X_op != O_constant)
461 if (exp->X_op != O_absent)
462 as_bad (_("bad or irreducible absolute expression"));
463 exp->X_add_number = 0;
465 return exp->X_add_number;
469 get_absolute_expression (void)
473 return get_absolute_expr (&exp);
476 static int pop_override_ok = 0;
477 static const char *pop_table_name;
480 pop_insert (const pseudo_typeS *table)
483 const pseudo_typeS *pop;
484 for (pop = table; pop->poc_name; pop++)
486 errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
487 if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
488 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name,
493 #ifndef md_pop_insert
494 #define md_pop_insert() pop_insert(md_pseudo_table)
497 #ifndef obj_pop_insert
498 #define obj_pop_insert() pop_insert(obj_pseudo_table)
501 #ifndef cfi_pop_insert
502 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
508 po_hash = hash_new ();
510 /* Do the target-specific pseudo ops. */
511 pop_table_name = "md";
514 /* Now object specific. Skip any that were in the target table. */
515 pop_table_name = "obj";
519 /* Now portable ones. Skip any that we've seen already. */
520 pop_table_name = "standard";
521 pop_insert (potable);
523 #ifdef TARGET_USE_CFIPOP
524 pop_table_name = "cfi";
530 #define HANDLE_CONDITIONAL_ASSEMBLY() \
531 if (ignore_input ()) \
533 char *eol = find_end_of_line (input_line_pointer, flag_m68k_mri); \
534 input_line_pointer = (input_line_pointer <= buffer_limit \
535 && eol >= buffer_limit) \
541 /* This function is used when scrubbing the characters between #APP
544 static char *scrub_string;
545 static char *scrub_string_end;
548 scrub_from_string (char *buf, int buflen)
552 copy = scrub_string_end - scrub_string;
555 memcpy (buf, scrub_string, copy);
556 scrub_string += copy;
560 /* Helper function of read_a_source_file, which tries to expand a macro. */
562 try_macro (char term, const char *line)
568 if (check_macro (line, &out, &err, ¯o))
572 *input_line_pointer++ = term;
573 input_scrub_include_sb (&out,
574 input_line_pointer, 1);
577 input_scrub_next_buffer (&input_line_pointer);
579 md_macro_info (macro);
586 /* We read the file, putting things into a web that represents what we
587 have been reading. */
589 read_a_source_file (char *name)
592 register char *s; /* String of symbol, '\0' appended. */
600 buffer = input_scrub_new_file (name);
603 listing_newline (NULL);
604 register_dependency (name);
606 /* Generate debugging information before we've read anything in to denote
607 this file as the "main" source file and not a subordinate one
608 (e.g. N_SO vs N_SOL in stabs). */
609 generate_file_debug ();
611 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
612 { /* We have another line to parse. */
614 /* In order to avoid listing macro expansion lines with labels
615 multiple times, keep track of which line was last issued. */
616 static char *last_eol;
620 while (input_line_pointer < buffer_limit)
622 /* We have more of this buffer to parse. */
624 /* We now have input_line_pointer->1st char of next line.
625 If input_line_pointer [-1] == '\n' then we just
626 scanned another line: so bump line counters. */
627 if (is_end_of_line[(unsigned char) input_line_pointer[-1]])
629 #ifdef md_start_line_hook
630 md_start_line_hook ();
632 if (input_line_pointer[-1] == '\n')
633 bump_line_counters ();
637 if (LABELS_WITHOUT_COLONS || flag_m68k_mri)
639 /* Text at the start of a line must be a label, we
640 run down and stick a colon in. */
641 if (is_name_beginner (*input_line_pointer))
643 char *line_start = input_line_pointer;
648 HANDLE_CONDITIONAL_ASSEMBLY ();
650 c = get_symbol_end ();
652 /* In MRI mode, the EQU and MACRO pseudoops must
653 be handled specially. */
657 char *rest = input_line_pointer + 1;
661 if (*rest == ' ' || *rest == '\t')
663 if ((strncasecmp (rest, "EQU", 3) == 0
664 || strncasecmp (rest, "SET", 3) == 0)
665 && (rest[3] == ' ' || rest[3] == '\t'))
667 input_line_pointer = rest + 3;
669 strncasecmp (rest, "SET", 3) == 0);
672 if (strncasecmp (rest, "MACRO", 5) == 0
675 || is_end_of_line[(unsigned char) rest[5]]))
679 /* In MRI mode, we need to handle the MACRO
680 pseudo-op specially: we don't want to put the
681 symbol in the symbol table. */
683 #ifdef TC_START_LABEL_WITHOUT_COLON
684 && TC_START_LABEL_WITHOUT_COLON(c,
688 line_label = colon (line_start);
690 line_label = symbol_create (line_start,
695 *input_line_pointer = c;
697 input_line_pointer++;
702 /* We are at the beginning of a line, or similar place.
703 We expect a well-formed assembler statement.
704 A "symbol-name:" is a statement.
706 Depending on what compiler is used, the order of these tests
707 may vary to catch most common case 1st.
708 Each test is independent of all other tests at the (top)
711 c = *input_line_pointer++;
712 while (c == '\t' || c == ' ' || c == '\f');
715 /* If listing is on, and we are expanding a macro, then give
716 the listing code the contents of the expanded line. */
719 if ((listing & LISTING_MACEXP) && macro_nest > 0)
724 /* Find the end of the current expanded macro line. */
725 s = find_end_of_line (input_line_pointer - 1, flag_m68k_mri);
730 /* Copy it for safe keeping. Also give an indication of
731 how much macro nesting is involved at this point. */
732 len = s - (input_line_pointer - 1);
733 copy = (char *) xmalloc (len + macro_nest + 2);
734 memset (copy, '>', macro_nest);
735 copy[macro_nest] = ' ';
736 memcpy (copy + macro_nest + 1, input_line_pointer - 1, len);
737 copy[macro_nest + 1 + len] = '\0';
739 /* Install the line with the listing facility. */
740 listing_newline (copy);
744 listing_newline (NULL);
747 /* C is the 1st significant character.
748 Input_line_pointer points after that character. */
749 if (is_name_beginner (c))
751 /* Want user-defined label or pseudo/opcode. */
752 HANDLE_CONDITIONAL_ASSEMBLY ();
754 s = --input_line_pointer;
755 c = get_symbol_end (); /* name's delimiter. */
757 /* C is character after symbol.
758 That character's place in the input line is now '\0'.
759 S points to the beginning of the symbol.
760 [In case of pseudo-op, s->'.'.]
761 Input_line_pointer->'\0' where c was. */
762 if (TC_START_LABEL (c, input_line_pointer))
766 char *rest = input_line_pointer + 1;
768 /* In MRI mode, \tsym: set 0 is permitted. */
772 if (*rest == ' ' || *rest == '\t')
775 if ((strncasecmp (rest, "EQU", 3) == 0
776 || strncasecmp (rest, "SET", 3) == 0)
777 && (rest[3] == ' ' || rest[3] == '\t'))
779 input_line_pointer = rest + 3;
785 line_label = colon (s); /* User-defined label. */
786 /* Put ':' back for error messages' sake. */
787 *input_line_pointer++ = ':';
788 #ifdef tc_check_label
789 tc_check_label (line_label);
791 /* Input_line_pointer->after ':'. */
794 else if (input_line_pointer[1] == '='
796 || ((c == ' ' || c == '\t')
797 && input_line_pointer[2] == '=')))
800 demand_empty_rest_of_line ();
803 || ((c == ' ' || c == '\t')
804 && input_line_pointer[1] == '='))
805 #ifdef TC_EQUAL_IN_INSN
806 && !TC_EQUAL_IN_INSN (c, s)
811 demand_empty_rest_of_line ();
815 /* Expect pseudo-op or machine instruction. */
818 #ifndef TC_CASE_SENSITIVE
822 strncpy (original_case_string, s2, sizeof (original_case_string));
823 original_case_string[sizeof (original_case_string) - 1] = 0;
832 if (NO_PSEUDO_DOT || flag_m68k_mri)
834 /* The MRI assembler uses pseudo-ops without
836 pop = (pseudo_typeS *) hash_find (po_hash, s);
837 if (pop != NULL && pop->poc_handler == NULL)
842 || (!flag_m68k_mri && *s == '.'))
846 WARNING: c has next char, which may be end-of-line.
847 We lookup the pseudo-op table with s+1 because we
848 already know that the pseudo-op begins with a '.'. */
851 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
852 if (pop && !pop->poc_handler)
855 /* In MRI mode, we may need to insert an
856 automatic alignment directive. What a hack
858 if (mri_pending_align
860 || !((pop->poc_handler == cons
861 && pop->poc_val == 1)
862 || (pop->poc_handler == s_space
863 && pop->poc_val == 1)
864 #ifdef tc_conditional_pseudoop
865 || tc_conditional_pseudoop (pop)
867 || pop->poc_handler == s_if
868 || pop->poc_handler == s_ifdef
869 || pop->poc_handler == s_ifc
870 || pop->poc_handler == s_ifeqs
871 || pop->poc_handler == s_else
872 || pop->poc_handler == s_endif
873 || pop->poc_handler == s_globl
874 || pop->poc_handler == s_ignore)))
876 do_align (1, (char *) NULL, 0, 0);
877 mri_pending_align = 0;
879 if (line_label != NULL)
881 symbol_set_frag (line_label, frag_now);
882 S_SET_VALUE (line_label, frag_now_fix ());
886 /* Print the error msg now, while we still can. */
889 char *end = input_line_pointer;
891 *input_line_pointer = c;
893 c = *--input_line_pointer;
894 *input_line_pointer = '\0';
895 if (! macro_defined || ! try_macro (c, s))
898 as_bad (_("unknown pseudo-op: `%s'"), s);
899 *input_line_pointer++ = c;
904 /* Put it back for error messages etc. */
905 *input_line_pointer = c;
906 /* The following skip of whitespace is compulsory.
907 A well shaped space is sometimes all that separates
908 keyword from operands. */
909 if (c == ' ' || c == '\t')
910 input_line_pointer++;
912 /* Input_line is restored.
913 Input_line_pointer->1st non-blank char
914 after pseudo-operation. */
915 (*pop->poc_handler) (pop->poc_val);
917 /* If that was .end, just get out now. */
918 if (pop->poc_handler == s_end)
923 /* WARNING: c has char, which may be end-of-line. */
924 /* Also: input_line_pointer->`\0` where c was. */
925 *input_line_pointer = c;
926 input_line_pointer = _find_end_of_line (input_line_pointer, flag_m68k_mri, 1);
927 c = *input_line_pointer;
928 *input_line_pointer = '\0';
930 generate_lineno_debug ();
932 if (macro_defined && try_macro (c, s))
935 if (mri_pending_align)
937 do_align (1, (char *) NULL, 0, 0);
938 mri_pending_align = 0;
939 if (line_label != NULL)
941 symbol_set_frag (line_label, frag_now);
942 S_SET_VALUE (line_label, frag_now_fix ());
946 md_assemble (s); /* Assemble 1 instruction. */
948 *input_line_pointer++ = c;
950 /* We resume loop AFTER the end-of-line from
957 /* Empty statement? */
958 if (is_end_of_line[(unsigned char) c])
961 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) && ISDIGIT (c))
963 /* local label ("4:") */
964 char *backup = input_line_pointer;
966 HANDLE_CONDITIONAL_ASSEMBLY ();
970 /* Read the whole number. */
971 while (ISDIGIT (*input_line_pointer))
973 temp = (temp * 10) + *input_line_pointer - '0';
974 ++input_line_pointer;
977 if (LOCAL_LABELS_DOLLAR
978 && *input_line_pointer == '$'
979 && *(input_line_pointer + 1) == ':')
981 input_line_pointer += 2;
983 if (dollar_label_defined (temp))
985 as_fatal (_("label \"%d$\" redefined"), temp);
988 define_dollar_label (temp);
989 colon (dollar_label_name (temp, 0));
994 && *input_line_pointer++ == ':')
996 fb_label_instance_inc (temp);
997 colon (fb_label_name (temp, 0));
1001 input_line_pointer = backup;
1002 } /* local label ("4:") */
1004 if (c && strchr (line_comment_chars, c))
1005 { /* Its a comment. Better say APP or NO_APP. */
1010 unsigned int new_length;
1013 s = input_line_pointer;
1014 if (strncmp (s, "APP\n", 4))
1017 ignore_rest_of_line ();
1020 bump_line_counters ();
1024 ends = strstr (s, "#NO_APP\n");
1028 unsigned int tmp_len;
1031 /* The end of the #APP wasn't in this buffer. We
1032 keep reading in buffers until we find the #NO_APP
1033 that goes with this #APP There is one. The specs
1035 tmp_len = buffer_limit - s;
1036 tmp_buf = xmalloc (tmp_len + 1);
1037 memcpy (tmp_buf, s, tmp_len);
1040 new_tmp = input_scrub_next_buffer (&buffer);
1044 buffer_limit = new_tmp;
1045 input_line_pointer = buffer;
1046 ends = strstr (buffer, "#NO_APP\n");
1048 num = ends - buffer;
1050 num = buffer_limit - buffer;
1052 tmp_buf = xrealloc (tmp_buf, tmp_len + num);
1053 memcpy (tmp_buf + tmp_len, buffer, num);
1058 input_line_pointer = ends ? ends + 8 : NULL;
1066 input_line_pointer = ends + 8;
1070 scrub_string_end = ends;
1072 new_length = ends - s;
1073 new_buf = (char *) xmalloc (new_length);
1080 space = (new_buf + new_length) - new_tmp;
1081 size = do_scrub_chars (scrub_from_string, new_tmp, space);
1089 new_buf = xrealloc (new_buf, new_length + 100);
1090 new_tmp = new_buf + new_length;
1097 /* We've "scrubbed" input to the preferred format. In the
1098 process we may have consumed the whole of the remaining
1099 file (and included files). We handle this formatted
1100 input similar to that of macro expansion, letting
1101 actual macro expansion (possibly nested) and other
1102 input expansion work. Beware that in messages, line
1103 numbers and possibly file names will be incorrect. */
1104 sb_add_string (&sbuf, new_buf);
1105 input_scrub_include_sb (&sbuf, input_line_pointer, 0);
1107 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1112 HANDLE_CONDITIONAL_ASSEMBLY ();
1114 #ifdef tc_unrecognized_line
1115 if (tc_unrecognized_line (c))
1118 input_line_pointer--;
1119 /* Report unknown char as error. */
1120 demand_empty_rest_of_line ();
1123 #ifdef md_after_pass_hook
1124 md_after_pass_hook ();
1133 /* Close the input file. */
1134 input_scrub_close ();
1135 #ifdef WARN_COMMENTS
1137 if (warn_comment && found_comment)
1138 as_warn_where (found_comment_file, found_comment,
1139 "first comment found here");
1144 /* Convert O_constant expression EXP into the equivalent O_big representation.
1145 Take the sign of the number from X_unsigned rather than X_add_number. */
1148 convert_to_bignum (expressionS *exp)
1153 value = exp->X_add_number;
1154 for (i = 0; i < sizeof (exp->X_add_number) / CHARS_PER_LITTLENUM; i++)
1156 generic_bignum[i] = value & LITTLENUM_MASK;
1157 value >>= LITTLENUM_NUMBER_OF_BITS;
1159 /* Add a sequence of sign bits if the top bit of X_add_number is not
1160 the sign of the original value. */
1161 if ((exp->X_add_number < 0) != !exp->X_unsigned)
1162 generic_bignum[i++] = exp->X_unsigned ? 0 : LITTLENUM_MASK;
1164 exp->X_add_number = i;
1167 /* For most MRI pseudo-ops, the line actually ends at the first
1168 nonquoted space. This function looks for that point, stuffs a null
1169 in, and sets *STOPCP to the character that used to be there, and
1170 returns the location.
1172 Until I hear otherwise, I am going to assume that this is only true
1173 for the m68k MRI assembler. */
1176 mri_comment_field (char *stopcp)
1182 know (flag_m68k_mri);
1184 for (s = input_line_pointer;
1185 ((!is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
1193 for (s = input_line_pointer;
1194 !is_end_of_line[(unsigned char) *s];
1204 /* Skip to the end of an MRI comment field. */
1207 mri_comment_end (char *stop, int stopc)
1211 input_line_pointer = stop;
1213 while (!is_end_of_line[(unsigned char) *input_line_pointer])
1214 ++input_line_pointer;
1218 s_abort (int ignore ATTRIBUTE_UNUSED)
1220 as_fatal (_(".abort detected. Abandoning ship."));
1223 /* Guts of .align directive. N is the power of two to which to align.
1224 FILL may be NULL, or it may point to the bytes of the fill pattern.
1225 LEN is the length of whatever FILL points to, if anything. MAX is
1226 the maximum number of characters to skip when doing the alignment,
1227 or 0 if there is no maximum. */
1230 do_align (int n, char *fill, int len, int max)
1232 if (now_seg == absolute_section)
1236 if (*fill++ != '\0')
1238 as_warn (_("ignoring fill value in absolute section"));
1245 #ifdef md_flush_pending_output
1246 md_flush_pending_output ();
1249 md_do_align (n, fill, len, max, just_record_alignment);
1252 /* Only make a frag if we HAVE to... */
1253 if (n != 0 && !need_pass_2)
1257 if (subseg_text_p (now_seg))
1258 frag_align_code (n, max);
1260 frag_align (n, 0, max);
1263 frag_align (n, *fill, max);
1265 frag_align_pattern (n, fill, len, max);
1269 just_record_alignment: ATTRIBUTE_UNUSED_LABEL
1272 record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
1275 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1276 (in bytes). A negative ARG is the negative of the length of the
1277 fill pattern. BYTES_P is non-zero if the alignment value should be
1278 interpreted as the byte boundary, rather than the power of 2. */
1279 #ifndef TC_ALIGN_LIMIT
1280 #define TC_ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1284 s_align (int arg, int bytes_p)
1286 unsigned int align_limit = TC_ALIGN_LIMIT;
1295 stop = mri_comment_field (&stopc);
1297 if (is_end_of_line[(unsigned char) *input_line_pointer])
1302 align = arg; /* Default value from pseudo-op table. */
1306 align = get_absolute_expression ();
1312 /* Convert to a power of 2. */
1317 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1320 as_bad (_("alignment not a power of 2"));
1326 if (align > align_limit)
1328 align = align_limit;
1329 as_warn (_("alignment too large: %u assumed"), align);
1332 if (*input_line_pointer != ',')
1339 ++input_line_pointer;
1340 if (*input_line_pointer == ',')
1344 fill = get_absolute_expression ();
1349 if (*input_line_pointer != ',')
1353 ++input_line_pointer;
1354 max = get_absolute_expression ();
1361 as_warn (_("expected fill pattern missing"));
1362 do_align (align, (char *) NULL, 0, max);
1377 do_align (align, &fill_char, fill_len, max);
1383 if ((size_t) fill_len > sizeof ab)
1385 md_number_to_chars (ab, fill, fill_len);
1386 do_align (align, ab, fill_len, max);
1390 demand_empty_rest_of_line ();
1393 mri_comment_end (stop, stopc);
1396 /* Handle the .align pseudo-op on machines where ".align 4" means
1397 align to a 4 byte boundary. */
1400 s_align_bytes (int arg)
1405 /* Handle the .align pseudo-op on machines where ".align 4" means align
1406 to a 2**4 boundary. */
1409 s_align_ptwo (int arg)
1414 /* Switch in and out of alternate macro mode. */
1419 demand_empty_rest_of_line ();
1420 macro_set_alternate (on);
1424 s_comm_internal (int param,
1425 symbolS *(*comm_parse_extra) (int, symbolS *, addressT))
1431 symbolS *symbolP = NULL;
1437 stop = mri_comment_field (&stopc);
1439 name = input_line_pointer;
1440 c = get_symbol_end ();
1441 /* Just after name is now '\0'. */
1442 p = input_line_pointer;
1447 as_bad (_("expected symbol name"));
1448 ignore_rest_of_line ();
1454 /* Accept an optional comma after the name. The comma used to be
1455 required, but Irix 5 cc does not generate it for .lcomm. */
1456 if (*input_line_pointer == ',')
1457 input_line_pointer++;
1459 temp = get_absolute_expr (&exp);
1461 size &= ((offsetT) 2 << (stdoutput->arch_info->bits_per_address - 1)) - 1;
1462 if (exp.X_op == O_absent)
1464 as_bad (_("missing size expression"));
1465 ignore_rest_of_line ();
1468 else if (temp != size || !exp.X_unsigned)
1470 as_warn (_("size (%ld) out of range, ignored"), (long) temp);
1471 ignore_rest_of_line ();
1476 symbolP = symbol_find_or_make (name);
1477 if ((S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
1478 && !S_IS_COMMON (symbolP))
1480 if (!S_IS_VOLATILE (symbolP))
1483 as_bad (_("symbol `%s' is already defined"), name);
1485 ignore_rest_of_line ();
1488 symbolP = symbol_clone (symbolP, 1);
1489 S_SET_SEGMENT (symbolP, undefined_section);
1490 S_SET_VALUE (symbolP, 0);
1491 symbol_set_frag (symbolP, &zero_address_frag);
1492 S_CLEAR_VOLATILE (symbolP);
1495 size = S_GET_VALUE (symbolP);
1498 else if (size != temp)
1499 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1500 name, (long) size, (long) temp);
1503 if (comm_parse_extra != NULL)
1504 symbolP = (*comm_parse_extra) (param, symbolP, size);
1507 S_SET_VALUE (symbolP, (valueT) size);
1508 S_SET_EXTERNAL (symbolP);
1509 S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
1512 extern int flag_one;
1513 if (size == 0 || !flag_one)
1514 S_GET_OTHER (symbolP) = const_flag;
1519 demand_empty_rest_of_line ();
1522 mri_comment_end (stop, stopc);
1529 s_comm_internal (ignore, NULL);
1532 /* The MRI COMMON pseudo-op. We handle this by creating a common
1533 symbol with the appropriate name. We make s_space do the right
1534 thing by increasing the size. */
1537 s_mri_common (int small ATTRIBUTE_UNUSED)
1553 stop = mri_comment_field (&stopc);
1557 name = input_line_pointer;
1558 if (!ISDIGIT (*name))
1559 c = get_symbol_end ();
1564 ++input_line_pointer;
1566 while (ISDIGIT (*input_line_pointer));
1568 c = *input_line_pointer;
1569 *input_line_pointer = '\0';
1571 if (line_label != NULL)
1573 alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
1574 + (input_line_pointer - name)
1576 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1581 sym = symbol_find_or_make (name);
1582 *input_line_pointer = c;
1586 if (*input_line_pointer != ',')
1590 ++input_line_pointer;
1591 align = get_absolute_expression ();
1594 if (S_IS_DEFINED (sym) && !S_IS_COMMON (sym))
1596 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym));
1597 ignore_rest_of_line ();
1598 mri_comment_end (stop, stopc);
1602 S_SET_EXTERNAL (sym);
1603 S_SET_SEGMENT (sym, bfd_com_section_ptr);
1604 mri_common_symbol = sym;
1608 S_SET_ALIGN (sym, align);
1611 if (line_label != NULL)
1614 exp.X_op = O_symbol;
1615 exp.X_add_symbol = sym;
1616 exp.X_add_number = 0;
1617 symbol_set_value_expression (line_label, &exp);
1618 symbol_set_frag (line_label, &zero_address_frag);
1619 S_SET_SEGMENT (line_label, expr_section);
1622 /* FIXME: We just ignore the small argument, which distinguishes
1623 COMMON and COMMON.S. I don't know what we can do about it. */
1625 /* Ignore the type and hptype. */
1626 if (*input_line_pointer == ',')
1627 input_line_pointer += 2;
1628 if (*input_line_pointer == ',')
1629 input_line_pointer += 2;
1631 demand_empty_rest_of_line ();
1633 mri_comment_end (stop, stopc);
1637 s_data (int ignore ATTRIBUTE_UNUSED)
1642 temp = get_absolute_expression ();
1643 if (flag_readonly_data_in_text)
1645 section = text_section;
1649 section = data_section;
1651 subseg_set (section, (subsegT) temp);
1656 demand_empty_rest_of_line ();
1659 /* Handle the .appfile pseudo-op. This is automatically generated by
1660 do_scrub_chars when a preprocessor # line comment is seen with a
1661 file name. This default definition may be overridden by the object
1662 or CPU specific pseudo-ops. This function is also the default
1663 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1667 s_app_file_string (char *file, int appfile ATTRIBUTE_UNUSED)
1671 listing_source_file (file);
1673 register_dependency (file);
1675 obj_app_file (file, appfile);
1680 s_app_file (int appfile)
1685 /* Some assemblers tolerate immediately following '"'. */
1686 if ((s = demand_copy_string (&length)) != 0)
1689 = (!new_logical_line_flags (s, -1, 1) && appfile);
1691 /* In MRI mode, the preprocessor may have inserted an extraneous
1694 && *input_line_pointer == '\''
1695 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1696 ++input_line_pointer;
1698 demand_empty_rest_of_line ();
1700 s_app_file_string (s, appfile);
1705 get_linefile_number (int *flag)
1709 if (*input_line_pointer < '0' || *input_line_pointer > '9')
1712 *flag = get_absolute_expression ();
1717 /* Handle the .appline pseudo-op. This is automatically generated by
1718 do_scrub_chars when a preprocessor # line comment is seen. This
1719 default definition may be overridden by the object or CPU specific
1723 s_app_line (int appline)
1728 /* The given number is that of the next line. */
1730 l = get_absolute_expression ();
1731 else if (!get_linefile_number (&l))
1733 ignore_rest_of_line ();
1740 /* Some of the back ends can't deal with non-positive line numbers.
1741 Besides, it's silly. GCC however will generate a line number of
1742 zero when it is pre-processing builtins for assembler-with-cpp files:
1746 We do not want to barf on this, especially since such files are used
1747 in the GCC and GDB testsuites. So we check for negative line numbers
1748 rather than non-positive line numbers. */
1749 as_warn (_("line numbers must be positive; line number %d rejected"),
1760 if (*input_line_pointer == '"')
1761 file = demand_copy_string (&length);
1767 while (get_linefile_number (&this_flag))
1770 /* From GCC's cpp documentation:
1771 1: start of a new file.
1772 2: returning to a file after having included
1774 3: following text comes from a system header file.
1775 4: following text should be treated as extern "C".
1777 4 is nonsensical for the assembler; 3, we don't
1778 care about, so we ignore it just in case a
1779 system header file is included while
1780 preprocessing assembly. So 1 and 2 are all we
1781 care about, and they are mutually incompatible.
1782 new_logical_line_flags() demands this. */
1785 if (flags && flags != (1 << this_flag))
1786 as_warn (_("incompatible flag %i in line directive"),
1789 flags |= 1 << this_flag;
1794 /* We ignore these. */
1798 as_warn (_("unsupported flag %i in line directive"),
1803 if (!is_end_of_line[(unsigned char)*input_line_pointer])
1808 if (appline || file)
1810 new_logical_line_flags (file, l, flags);
1813 listing_source_line (l);
1817 if (appline || file)
1818 demand_empty_rest_of_line ();
1820 ignore_rest_of_line ();
1823 /* Handle the .end pseudo-op. Actually, the real work is done in
1824 read_a_source_file. */
1827 s_end (int ignore ATTRIBUTE_UNUSED)
1831 /* The MRI assembler permits the start symbol to follow .end,
1832 but we don't support that. */
1834 if (!is_end_of_line[(unsigned char) *input_line_pointer]
1835 && *input_line_pointer != '*'
1836 && *input_line_pointer != '!')
1837 as_warn (_("start address not supported"));
1841 /* Handle the .err pseudo-op. */
1844 s_err (int ignore ATTRIBUTE_UNUSED)
1846 as_bad (_(".err encountered"));
1847 demand_empty_rest_of_line ();
1850 /* Handle the .error and .warning pseudo-ops. */
1856 /* The purpose for the conditional assignment is not to
1857 internationalize the directive itself, but that we need a
1858 self-contained message, one that can be passed like the
1859 demand_copy_C_string return value, and with no assumption on the
1860 location of the name of the directive within the message. */
1862 = (err ? _(".error directive invoked in source file")
1863 : _(".warning directive invoked in source file"));
1865 if (!is_it_end_of_statement ())
1867 if (*input_line_pointer != '\"')
1869 as_bad (_("%s argument must be a string"),
1870 err ? ".error" : ".warning");
1871 ignore_rest_of_line ();
1875 msg = demand_copy_C_string (&len);
1883 as_warn ("%s", msg);
1884 demand_empty_rest_of_line ();
1887 /* Handle the MRI fail pseudo-op. */
1890 s_fail (int ignore ATTRIBUTE_UNUSED)
1897 stop = mri_comment_field (&stopc);
1899 temp = get_absolute_expression ();
1901 as_warn (_(".fail %ld encountered"), (long) temp);
1903 as_bad (_(".fail %ld encountered"), (long) temp);
1905 demand_empty_rest_of_line ();
1908 mri_comment_end (stop, stopc);
1912 s_fill (int ignore ATTRIBUTE_UNUSED)
1914 expressionS rep_exp;
1916 register long fill = 0;
1919 #ifdef md_flush_pending_output
1920 md_flush_pending_output ();
1923 get_known_segmented_expression (&rep_exp);
1924 if (*input_line_pointer == ',')
1926 input_line_pointer++;
1927 size = get_absolute_expression ();
1928 if (*input_line_pointer == ',')
1930 input_line_pointer++;
1931 fill = get_absolute_expression ();
1935 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1936 #define BSD_FILL_SIZE_CROCK_8 (8)
1937 if (size > BSD_FILL_SIZE_CROCK_8)
1939 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8);
1940 size = BSD_FILL_SIZE_CROCK_8;
1944 as_warn (_("size negative; .fill ignored"));
1947 else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
1949 if (rep_exp.X_add_number < 0)
1950 as_warn (_("repeat < 0; .fill ignored"));
1954 if (size && !need_pass_2)
1956 if (rep_exp.X_op == O_constant)
1958 p = frag_var (rs_fill, (int) size, (int) size,
1959 (relax_substateT) 0, (symbolS *) 0,
1960 (offsetT) rep_exp.X_add_number,
1965 /* We don't have a constant repeat count, so we can't use
1966 rs_fill. We can get the same results out of rs_space,
1967 but its argument is in bytes, so we must multiply the
1968 repeat count by size. */
1971 rep_sym = make_expr_symbol (&rep_exp);
1974 expressionS size_exp;
1975 size_exp.X_op = O_constant;
1976 size_exp.X_add_number = size;
1978 rep_exp.X_op = O_multiply;
1979 rep_exp.X_add_symbol = rep_sym;
1980 rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
1981 rep_exp.X_add_number = 0;
1982 rep_sym = make_expr_symbol (&rep_exp);
1985 p = frag_var (rs_space, (int) size, (int) size,
1986 (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
1989 memset (p, 0, (unsigned int) size);
1991 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1992 flavoured AS. The following bizarre behaviour is to be
1993 compatible with above. I guess they tried to take up to 8
1994 bytes from a 4-byte expression and they forgot to sign
1996 #define BSD_FILL_SIZE_CROCK_4 (4)
1997 md_number_to_chars (p, (valueT) fill,
1998 (size > BSD_FILL_SIZE_CROCK_4
1999 ? BSD_FILL_SIZE_CROCK_4
2001 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
2002 but emits no error message because it seems a legal thing to do.
2003 It is a degenerate case of .fill but could be emitted by a
2006 demand_empty_rest_of_line ();
2010 s_globl (int ignore ATTRIBUTE_UNUSED)
2019 stop = mri_comment_field (&stopc);
2023 name = input_line_pointer;
2024 c = get_symbol_end ();
2025 symbolP = symbol_find_or_make (name);
2026 S_SET_EXTERNAL (symbolP);
2028 *input_line_pointer = c;
2030 c = *input_line_pointer;
2033 input_line_pointer++;
2035 if (is_end_of_line[(unsigned char) *input_line_pointer])
2041 demand_empty_rest_of_line ();
2044 mri_comment_end (stop, stopc);
2048 #define skip_whitespace(str) do { if (*(str) == ' ') ++(str); } while (0)
2051 skip_past_char (char ** str, char c)
2061 #define skip_past_comma(str) skip_past_char (str, ',')
2063 /* Parse an attribute directive for VENDOR. */
2065 s_vendor_attribute (int vendor)
2075 if (exp.X_op != O_constant)
2078 tag = exp.X_add_number;
2079 type = _bfd_elf_obj_attrs_arg_type (stdoutput, vendor, tag);
2081 if (skip_past_comma (&input_line_pointer) == -1)
2086 if (exp.X_op != O_constant)
2088 as_bad (_("expected numeric constant"));
2089 ignore_rest_of_line ();
2092 i = exp.X_add_number;
2095 && skip_past_comma (&input_line_pointer) == -1)
2097 as_bad (_("expected comma"));
2098 ignore_rest_of_line ();
2103 skip_whitespace(input_line_pointer);
2104 if (*input_line_pointer != '"')
2106 input_line_pointer++;
2107 s = input_line_pointer;
2108 while (*input_line_pointer && *input_line_pointer != '"')
2109 input_line_pointer++;
2110 if (*input_line_pointer != '"')
2112 saved_char = *input_line_pointer;
2113 *input_line_pointer = 0;
2124 bfd_elf_add_obj_attr_compat (stdoutput, vendor, i, s);
2127 bfd_elf_add_obj_attr_string (stdoutput, vendor, tag, s);
2130 bfd_elf_add_obj_attr_int (stdoutput, vendor, tag, i);
2138 *input_line_pointer = saved_char;
2139 input_line_pointer++;
2141 demand_empty_rest_of_line ();
2144 as_bad (_("bad string constant"));
2145 ignore_rest_of_line ();
2148 as_bad (_("expected <tag> , <value>"));
2149 ignore_rest_of_line ();
2152 /* Parse a .gnu_attribute directive. */
2155 s_gnu_attribute (int ignored ATTRIBUTE_UNUSED)
2157 s_vendor_attribute (OBJ_ATTR_GNU);
2159 #endif /* OBJ_ELF */
2161 /* Handle the MRI IRP and IRPC pseudo-ops. */
2172 as_where (&file, &line);
2175 eol = find_end_of_line (input_line_pointer, 0);
2176 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2177 input_line_pointer = eol;
2181 err = expand_irp (irpc, 0, &s, &out, get_line_sb);
2183 as_bad_where (file, line, "%s", err);
2187 input_scrub_include_sb (&out, input_line_pointer, 1);
2189 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2192 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2193 the section to only be linked once. However, this is not supported
2194 by most object file formats. This takes an optional argument,
2195 which is what to do about duplicates. */
2198 s_linkonce (int ignore ATTRIBUTE_UNUSED)
2200 enum linkonce_type type;
2204 type = LINKONCE_DISCARD;
2206 if (!is_end_of_line[(unsigned char) *input_line_pointer])
2211 s = input_line_pointer;
2212 c = get_symbol_end ();
2213 if (strcasecmp (s, "discard") == 0)
2214 type = LINKONCE_DISCARD;
2215 else if (strcasecmp (s, "one_only") == 0)
2216 type = LINKONCE_ONE_ONLY;
2217 else if (strcasecmp (s, "same_size") == 0)
2218 type = LINKONCE_SAME_SIZE;
2219 else if (strcasecmp (s, "same_contents") == 0)
2220 type = LINKONCE_SAME_CONTENTS;
2222 as_warn (_("unrecognized .linkonce type `%s'"), s);
2224 *input_line_pointer = c;
2227 #ifdef obj_handle_link_once
2228 obj_handle_link_once (type);
2229 #else /* ! defined (obj_handle_link_once) */
2233 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
2234 as_warn (_(".linkonce is not supported for this object file format"));
2236 flags = bfd_get_section_flags (stdoutput, now_seg);
2237 flags |= SEC_LINK_ONCE;
2242 case LINKONCE_DISCARD:
2243 flags |= SEC_LINK_DUPLICATES_DISCARD;
2245 case LINKONCE_ONE_ONLY:
2246 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
2248 case LINKONCE_SAME_SIZE:
2249 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
2251 case LINKONCE_SAME_CONTENTS:
2252 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
2255 if (!bfd_set_section_flags (stdoutput, now_seg, flags))
2256 as_bad (_("bfd_set_section_flags: %s"),
2257 bfd_errmsg (bfd_get_error ()));
2259 #endif /* ! defined (obj_handle_link_once) */
2261 demand_empty_rest_of_line ();
2265 bss_alloc (symbolS *symbolP, addressT size, int align)
2268 segT current_seg = now_seg;
2269 subsegT current_subseg = now_subseg;
2270 segT bss_seg = bss_section;
2272 #if defined (TC_MIPS) || defined (TC_ALPHA)
2273 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
2274 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
2276 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2277 if (size <= bfd_get_gp_size (stdoutput))
2279 bss_seg = subseg_new (".sbss", 1);
2280 seg_info (bss_seg)->bss = 1;
2281 if (!bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
2282 as_warn (_("error setting flags for \".sbss\": %s"),
2283 bfd_errmsg (bfd_get_error ()));
2287 subseg_set (bss_seg, 1);
2291 record_alignment (bss_seg, align);
2292 frag_align (align, 0, 0);
2295 /* Detach from old frag. */
2296 if (S_GET_SEGMENT (symbolP) == bss_seg)
2297 symbol_get_frag (symbolP)->fr_symbol = NULL;
2299 symbol_set_frag (symbolP, frag_now);
2300 pfrag = frag_var (rs_org, 1, 1, 0, symbolP, size, NULL);
2304 S_SET_SIZE (symbolP, size);
2306 S_SET_SEGMENT (symbolP, bss_seg);
2309 /* The symbol may already have been created with a preceding
2310 ".globl" directive -- be careful not to step on storage class
2311 in that case. Otherwise, set it to static. */
2312 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
2313 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2314 #endif /* OBJ_COFF */
2316 subseg_set (current_seg, current_subseg);
2320 parse_align (int align_bytes)
2326 if (*input_line_pointer != ',')
2329 as_bad (_("expected alignment after size"));
2330 ignore_rest_of_line ();
2334 input_line_pointer++;
2337 align = get_absolute_expr (&exp);
2338 if (exp.X_op == O_absent)
2341 if (!exp.X_unsigned)
2343 as_warn (_("alignment negative; 0 assumed"));
2347 if (align_bytes && align != 0)
2349 /* convert to a power of 2 alignment */
2350 unsigned int alignp2 = 0;
2351 while ((align & 1) == 0)
2352 align >>= 1, ++alignp2;
2355 as_bad (_("alignment not a power of 2"));
2356 ignore_rest_of_line ();
2364 /* Called from s_comm_internal after symbol name and size have been
2365 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2366 1 if this was a ".bss" directive which has a 3rd argument
2367 (alignment as a power of 2), or 2 if this was a ".bss" directive
2368 with alignment in bytes. */
2371 s_lcomm_internal (int needs_align, symbolS *symbolP, addressT size)
2377 align = parse_align (needs_align - 1);
2378 if (align == (addressT) -1)
2382 /* Assume some objects may require alignment on some systems. */
2383 TC_IMPLICIT_LCOMM_ALIGNMENT (size, align);
2385 bss_alloc (symbolP, size, align);
2390 s_lcomm (int needs_align)
2392 s_comm_internal (needs_align, s_lcomm_internal);
2396 s_lcomm_bytes (int needs_align)
2398 s_comm_internal (needs_align * 2, s_lcomm_internal);
2402 s_lsym (int ignore ATTRIBUTE_UNUSED)
2404 register char *name;
2408 register symbolS *symbolP;
2410 /* We permit ANY defined expression: BSD4.2 demands constants. */
2411 name = input_line_pointer;
2412 c = get_symbol_end ();
2413 p = input_line_pointer;
2418 as_bad (_("expected symbol name"));
2419 ignore_rest_of_line ();
2425 if (*input_line_pointer != ',')
2428 as_bad (_("expected comma after \"%s\""), name);
2430 ignore_rest_of_line ();
2434 input_line_pointer++;
2435 expression_and_evaluate (&exp);
2437 if (exp.X_op != O_constant
2438 && exp.X_op != O_register)
2440 as_bad (_("bad expression"));
2441 ignore_rest_of_line ();
2446 symbolP = symbol_find_or_make (name);
2448 if (S_GET_SEGMENT (symbolP) == undefined_section)
2450 /* The name might be an undefined .global symbol; be sure to
2451 keep the "external" bit. */
2452 S_SET_SEGMENT (symbolP,
2453 (exp.X_op == O_constant
2456 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2460 as_bad (_("symbol `%s' is already defined"), name);
2464 demand_empty_rest_of_line ();
2467 /* Read a line into an sb. Returns the character that ended the line
2468 or zero if there are no more lines. */
2471 get_line_sb (sb *line)
2475 if (input_line_pointer[-1] == '\n')
2476 bump_line_counters ();
2478 if (input_line_pointer >= buffer_limit)
2480 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2481 if (buffer_limit == 0)
2485 eol = find_end_of_line (input_line_pointer, flag_m68k_mri);
2486 sb_add_buffer (line, input_line_pointer, eol - input_line_pointer);
2487 input_line_pointer = eol;
2489 /* Don't skip multiple end-of-line characters, because that breaks support
2490 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2491 characters but isn't. Instead just skip one end of line character and
2492 return the character skipped so that the caller can re-insert it if
2494 return *input_line_pointer++;
2497 /* Define a macro. This is an interface to macro.c. */
2500 s_macro (int ignore ATTRIBUTE_UNUSED)
2508 as_where (&file, &line);
2511 eol = find_end_of_line (input_line_pointer, 0);
2512 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2513 input_line_pointer = eol;
2515 if (line_label != NULL)
2520 sb_add_string (&label, S_GET_NAME (line_label));
2521 err = define_macro (0, &s, &label, get_line_sb, file, line, &name);
2525 err = define_macro (0, &s, NULL, get_line_sb, file, line, &name);
2527 as_bad_where (file, line, err, name);
2530 if (line_label != NULL)
2532 S_SET_SEGMENT (line_label, absolute_section);
2533 S_SET_VALUE (line_label, 0);
2534 symbol_set_frag (line_label, &zero_address_frag);
2537 if (((NO_PSEUDO_DOT || flag_m68k_mri)
2538 && hash_find (po_hash, name) != NULL)
2541 && hash_find (po_hash, name + 1) != NULL))
2542 as_warn_where (file,
2544 _("attempt to redefine pseudo-op `%s' ignored"),
2551 /* Handle the .mexit pseudo-op, which immediately exits a macro
2555 s_mexit (int ignore ATTRIBUTE_UNUSED)
2557 cond_exit_macro (macro_nest);
2558 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2561 /* Switch in and out of MRI mode. */
2564 s_mri (int ignore ATTRIBUTE_UNUSED)
2568 on = get_absolute_expression ();
2569 old_flag = flag_mri;
2587 /* Operator precedence changes in m68k MRI mode, so we need to
2588 update the operator rankings. */
2589 expr_set_precedence ();
2591 #ifdef MRI_MODE_CHANGE
2593 MRI_MODE_CHANGE (on);
2596 demand_empty_rest_of_line ();
2599 /* Handle changing the location counter. */
2602 do_org (segT segment, expressionS *exp, int fill)
2604 if (segment != now_seg && segment != absolute_section)
2605 as_bad (_("invalid segment \"%s\""), segment_name (segment));
2607 if (now_seg == absolute_section)
2610 as_warn (_("ignoring fill value in absolute section"));
2611 if (exp->X_op != O_constant)
2613 as_bad (_("only constant offsets supported in absolute section"));
2614 exp->X_add_number = 0;
2616 abs_section_offset = exp->X_add_number;
2621 symbolS *sym = exp->X_add_symbol;
2622 offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
2624 if (exp->X_op != O_constant && exp->X_op != O_symbol)
2626 /* Handle complex expressions. */
2627 sym = make_expr_symbol (exp);
2631 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
2637 s_org (int ignore ATTRIBUTE_UNUSED)
2639 register segT segment;
2641 register long temp_fill;
2643 #ifdef md_flush_pending_output
2644 md_flush_pending_output ();
2647 /* The m68k MRI assembler has a different meaning for .org. It
2648 means to create an absolute section at a given address. We can't
2649 support that--use a linker script instead. */
2652 as_bad (_("MRI style ORG pseudo-op not supported"));
2653 ignore_rest_of_line ();
2657 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2658 thing as a sub-segment-relative origin. Any absolute origin is
2659 given a warning, then assumed to be segment-relative. Any
2660 segmented origin expression ("foo+42") had better be in the right
2661 segment or the .org is ignored.
2663 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2664 we never know sub-segment sizes when we are reading code. BSD
2665 will crash trying to emit negative numbers of filler bytes in
2666 certain .orgs. We don't crash, but see as-write for that code.
2668 Don't make frag if need_pass_2==1. */
2669 segment = get_known_segmented_expression (&exp);
2670 if (*input_line_pointer == ',')
2672 input_line_pointer++;
2673 temp_fill = get_absolute_expression ();
2679 do_org (segment, &exp, temp_fill);
2681 demand_empty_rest_of_line ();
2684 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2685 called by the obj-format routine which handles section changing
2686 when in MRI mode. It will create a new section, and return it. It
2687 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2688 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2691 s_mri_sect (char *type ATTRIBUTE_UNUSED)
2701 name = input_line_pointer;
2702 if (!ISDIGIT (*name))
2703 c = get_symbol_end ();
2708 ++input_line_pointer;
2710 while (ISDIGIT (*input_line_pointer));
2712 c = *input_line_pointer;
2713 *input_line_pointer = '\0';
2716 name = xstrdup (name);
2718 *input_line_pointer = c;
2720 seg = subseg_new (name, 0);
2722 if (*input_line_pointer == ',')
2726 ++input_line_pointer;
2727 align = get_absolute_expression ();
2728 record_alignment (seg, align);
2732 if (*input_line_pointer == ',')
2734 c = *++input_line_pointer;
2736 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2739 as_bad (_("unrecognized section type"));
2740 ++input_line_pointer;
2745 flags = SEC_NO_FLAGS;
2747 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2748 else if (*type == 'D' || *type == 'M')
2749 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2750 else if (*type == 'R')
2751 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2752 if (flags != SEC_NO_FLAGS)
2754 if (!bfd_set_section_flags (stdoutput, seg, flags))
2755 as_warn (_("error setting flags for \"%s\": %s"),
2756 bfd_section_name (stdoutput, seg),
2757 bfd_errmsg (bfd_get_error ()));
2762 /* Ignore the HP type. */
2763 if (*input_line_pointer == ',')
2764 input_line_pointer += 2;
2766 demand_empty_rest_of_line ();
2768 #else /* ! TC_M68K */
2777 name = input_line_pointer;
2778 c = get_symbol_end ();
2780 name = xstrdup (name);
2782 *input_line_pointer = c;
2784 seg = subseg_new (name, 0);
2786 if (*input_line_pointer != ',')
2792 ++input_line_pointer;
2794 sectype = input_line_pointer;
2795 c = get_symbol_end ();
2796 if (*sectype == '\0')
2798 else if (strcasecmp (sectype, "text") == 0)
2800 else if (strcasecmp (sectype, "data") == 0)
2802 else if (strcasecmp (sectype, "romdata") == 0)
2805 as_warn (_("unrecognized section type `%s'"), sectype);
2806 *input_line_pointer = c;
2809 if (*input_line_pointer == ',')
2813 ++input_line_pointer;
2815 seccmd = input_line_pointer;
2816 c = get_symbol_end ();
2817 if (strcasecmp (seccmd, "absolute") == 0)
2819 as_bad (_("absolute sections are not supported"));
2820 *input_line_pointer = c;
2821 ignore_rest_of_line ();
2824 else if (strcasecmp (seccmd, "align") == 0)
2828 *input_line_pointer = c;
2829 align = get_absolute_expression ();
2830 record_alignment (seg, align);
2834 as_warn (_("unrecognized section command `%s'"), seccmd);
2835 *input_line_pointer = c;
2839 demand_empty_rest_of_line ();
2841 #else /* ! TC_I960 */
2842 /* The MRI assembler seems to use different forms of .sect for
2843 different targets. */
2844 as_bad ("MRI mode not supported for this target");
2845 ignore_rest_of_line ();
2846 #endif /* ! TC_I960 */
2847 #endif /* ! TC_M68K */
2850 /* Handle the .print pseudo-op. */
2853 s_print (int ignore ATTRIBUTE_UNUSED)
2858 s = demand_copy_C_string (&len);
2861 demand_empty_rest_of_line ();
2864 /* Handle the .purgem pseudo-op. */
2867 s_purgem (int ignore ATTRIBUTE_UNUSED)
2869 if (is_it_end_of_statement ())
2871 demand_empty_rest_of_line ();
2881 name = input_line_pointer;
2882 c = get_symbol_end ();
2883 delete_macro (name);
2884 *input_line_pointer = c;
2887 while (*input_line_pointer++ == ',');
2889 --input_line_pointer;
2890 demand_empty_rest_of_line ();
2893 /* Handle the .endm/.endr pseudo-ops. */
2896 s_bad_end (int endr)
2898 as_warn (_(".end%c encountered without preceeding %s"),
2900 endr ? ".rept, .irp, or .irpc" : ".macro");
2901 demand_empty_rest_of_line ();
2904 /* Handle the .rept pseudo-op. */
2907 s_rept (int ignore ATTRIBUTE_UNUSED)
2911 count = get_absolute_expression ();
2913 do_repeat (count, "REPT", "ENDR");
2916 /* This function provides a generic repeat block implementation. It allows
2917 different directives to be used as the start/end keys. */
2920 do_repeat (int count, const char *start, const char *end)
2926 if (!buffer_and_nest (start, end, &one, get_line_sb))
2928 as_bad (_("%s without %s"), start, end);
2934 sb_add_sb (&many, &one);
2938 input_scrub_include_sb (&many, input_line_pointer, 1);
2940 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2943 /* Skip to end of current repeat loop; EXTRA indicates how many additional
2944 input buffers to skip. Assumes that conditionals preceding the loop end
2945 are properly nested.
2947 This function makes it easier to implement a premature "break" out of the
2948 loop. The EXTRA arg accounts for other buffers we might have inserted,
2949 such as line substitutions. */
2952 end_repeat (int extra)
2954 cond_exit_macro (macro_nest);
2955 while (extra-- >= 0)
2956 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2960 assign_symbol (char *name, int mode)
2964 if (name[0] == '.' && name[1] == '\0')
2966 /* Turn '. = mumble' into a .org mumble. */
2970 segment = get_known_segmented_expression (&exp);
2973 do_org (segment, &exp, 0);
2978 if ((symbolP = symbol_find (name)) == NULL
2979 && (symbolP = md_undefined_symbol (name)) == NULL)
2981 symbolP = symbol_find_or_make (name);
2983 /* When doing symbol listings, play games with dummy fragments living
2984 outside the normal fragment chain to record the file and line info
2986 if (listing & LISTING_SYMBOLS)
2988 extern struct list_info_struct *listing_tail;
2989 fragS *dummy_frag = (fragS *) xcalloc (1, sizeof (fragS));
2990 dummy_frag->line = listing_tail;
2991 dummy_frag->fr_symbol = symbolP;
2992 symbol_set_frag (symbolP, dummy_frag);
2996 /* "set" symbols are local unless otherwise specified. */
2997 SF_SET_LOCAL (symbolP);
3001 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
3003 /* Permit register names to be redefined. */
3004 if ((mode != 0 || !S_IS_VOLATILE (symbolP))
3005 && S_GET_SEGMENT (symbolP) != reg_section)
3007 as_bad (_("symbol `%s' is already defined"), name);
3008 symbolP = symbol_clone (symbolP, 0);
3010 /* If the symbol is volatile, copy the symbol and replace the
3011 original with the copy, so that previous uses of the symbol will
3012 retain the value of the symbol at the point of use. */
3013 else if (S_IS_VOLATILE (symbolP))
3014 symbolP = symbol_clone (symbolP, 1);
3018 S_SET_VOLATILE (symbolP);
3020 S_SET_FORWARD_REF (symbolP);
3022 pseudo_set (symbolP);
3025 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3026 then this is .equiv, and it is an error if the symbol is already
3027 defined. If EQUIV is -1, the symbol additionally is a forward
3037 /* Especial apologies for the random logic:
3038 this just grew, and could be parsed much more simply!
3040 name = input_line_pointer;
3041 delim = get_symbol_end ();
3042 end_name = input_line_pointer;
3045 if (name == end_name)
3047 as_bad (_("expected symbol name"));
3048 ignore_rest_of_line ();
3054 if (*input_line_pointer != ',')
3057 as_bad (_("expected comma after \"%s\""), name);
3059 ignore_rest_of_line ();
3063 input_line_pointer++;
3066 assign_symbol (name, equiv);
3069 demand_empty_rest_of_line ();
3082 #ifdef md_flush_pending_output
3083 md_flush_pending_output ();
3087 stop = mri_comment_field (&stopc);
3089 /* In m68k MRI mode, we need to align to a word boundary, unless
3091 if (flag_m68k_mri && mult > 1)
3093 if (now_seg == absolute_section)
3095 abs_section_offset += abs_section_offset & 1;
3096 if (line_label != NULL)
3097 S_SET_VALUE (line_label, abs_section_offset);
3099 else if (mri_common_symbol != NULL)
3103 val = S_GET_VALUE (mri_common_symbol);
3106 S_SET_VALUE (mri_common_symbol, val + 1);
3107 if (line_label != NULL)
3109 expressionS *symexp;
3111 symexp = symbol_get_value_expression (line_label);
3112 know (symexp->X_op == O_symbol);
3113 know (symexp->X_add_symbol == mri_common_symbol);
3114 symexp->X_add_number += 1;
3120 do_align (1, (char *) NULL, 0, 0);
3121 if (line_label != NULL)
3123 symbol_set_frag (line_label, frag_now);
3124 S_SET_VALUE (line_label, frag_now_fix ());
3134 if (*input_line_pointer == ',')
3136 ++input_line_pointer;
3141 val.X_op = O_constant;
3142 val.X_add_number = 0;
3145 if (val.X_op != O_constant
3146 || val.X_add_number < - 0x80
3147 || val.X_add_number > 0xff
3148 || (mult != 0 && mult != 1 && val.X_add_number != 0))
3150 resolve_expression (&exp);
3151 if (exp.X_op != O_constant)
3152 as_bad (_("unsupported variable size or fill value"));
3159 bytes = mult * exp.X_add_number;
3160 for (i = 0; i < exp.X_add_number; i++)
3161 emit_expr (&val, mult);
3166 if (now_seg == absolute_section || mri_common_symbol != NULL)
3167 resolve_expression (&exp);
3169 if (exp.X_op == O_constant)
3173 repeat = exp.X_add_number;
3180 as_warn (_(".space repeat count is zero, ignored"));
3181 else if (repeat < 0)
3182 as_warn (_(".space repeat count is negative, ignored"));
3186 /* If we are in the absolute section, just bump the offset. */
3187 if (now_seg == absolute_section)
3189 abs_section_offset += repeat;
3193 /* If we are secretly in an MRI common section, then
3194 creating space just increases the size of the common
3196 if (mri_common_symbol != NULL)
3198 S_SET_VALUE (mri_common_symbol,
3199 S_GET_VALUE (mri_common_symbol) + repeat);
3204 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
3205 (offsetT) repeat, (char *) 0);
3209 if (now_seg == absolute_section)
3211 as_bad (_("space allocation too complex in absolute section"));
3212 subseg_set (text_section, 0);
3215 if (mri_common_symbol != NULL)
3217 as_bad (_("space allocation too complex in common section"));
3218 mri_common_symbol = NULL;
3222 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
3223 make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
3227 *p = val.X_add_number;
3232 /* In MRI mode, after an odd number of bytes, we must align to an
3233 even word boundary, unless the next instruction is a dc.b, ds.b
3235 if (flag_mri && (bytes & 1) != 0)
3236 mri_pending_align = 1;
3238 demand_empty_rest_of_line ();
3241 mri_comment_end (stop, stopc);
3244 /* This is like s_space, but the value is a floating point number with
3245 the given precision. This is for the MRI dcb.s pseudo-op and
3249 s_float_space (int float_type)
3253 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3258 stop = mri_comment_field (&stopc);
3260 count = get_absolute_expression ();
3263 if (*input_line_pointer != ',')
3265 as_bad (_("missing value"));
3266 ignore_rest_of_line ();
3268 mri_comment_end (stop, stopc);
3272 ++input_line_pointer;
3276 /* Skip any 0{letter} that may be present. Don't even check if the
3277 * letter is legal. */
3278 if (input_line_pointer[0] == '0'
3279 && ISALPHA (input_line_pointer[1]))
3280 input_line_pointer += 2;
3282 /* Accept :xxxx, where the x's are hex digits, for a floating point
3283 with the exact digits specified. */
3284 if (input_line_pointer[0] == ':')
3286 flen = hex_float (float_type, temp);
3289 ignore_rest_of_line ();
3291 mri_comment_end (stop, stopc);
3299 err = md_atof (float_type, temp, &flen);
3300 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
3301 know (err != NULL || flen > 0);
3304 as_bad (_("bad floating literal: %s"), err);
3305 ignore_rest_of_line ();
3307 mri_comment_end (stop, stopc);
3312 while (--count >= 0)
3316 p = frag_more (flen);
3317 memcpy (p, temp, (unsigned int) flen);
3320 demand_empty_rest_of_line ();
3323 mri_comment_end (stop, stopc);
3326 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3329 s_struct (int ignore ATTRIBUTE_UNUSED)
3335 stop = mri_comment_field (&stopc);
3336 abs_section_offset = get_absolute_expression ();
3337 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3338 /* The ELF backend needs to know that we are changing sections, so
3339 that .previous works correctly. */
3341 obj_elf_section_change_hook ();
3343 subseg_set (absolute_section, 0);
3344 demand_empty_rest_of_line ();
3346 mri_comment_end (stop, stopc);
3350 s_text (int ignore ATTRIBUTE_UNUSED)
3354 temp = get_absolute_expression ();
3355 subseg_set (text_section, (subsegT) temp);
3356 demand_empty_rest_of_line ();
3358 const_flag &= ~IN_DEFAULT_SECTION;
3362 /* .weakref x, y sets x as an alias to y that, as long as y is not
3363 referenced directly, will cause y to become a weak symbol. */
3365 s_weakref (int ignore ATTRIBUTE_UNUSED)
3374 name = input_line_pointer;
3375 delim = get_symbol_end ();
3376 end_name = input_line_pointer;
3378 if (name == end_name)
3380 as_bad (_("expected symbol name"));
3382 ignore_rest_of_line ();
3386 symbolP = symbol_find_or_make (name);
3388 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
3390 if (!S_IS_VOLATILE (symbolP))
3392 as_bad (_("symbol `%s' is already defined"), name);
3394 ignore_rest_of_line ();
3397 symbolP = symbol_clone (symbolP, 1);
3398 S_CLEAR_VOLATILE (symbolP);
3405 if (*input_line_pointer != ',')
3408 as_bad (_("expected comma after \"%s\""), name);
3410 ignore_rest_of_line ();
3414 input_line_pointer++;
3418 name = input_line_pointer;
3419 delim = get_symbol_end ();
3420 end_name = input_line_pointer;
3422 if (name == end_name)
3424 as_bad (_("expected symbol name"));
3425 ignore_rest_of_line ();
3429 if ((symbolP2 = symbol_find_noref (name, 1)) == NULL
3430 && (symbolP2 = md_undefined_symbol (name)) == NULL)
3432 symbolP2 = symbol_find_or_make (name);
3433 S_SET_WEAKREFD (symbolP2);
3437 symbolS *symp = symbolP2;
3439 while (S_IS_WEAKREFR (symp) && symp != symbolP)
3441 expressionS *expP = symbol_get_value_expression (symp);
3443 assert (expP->X_op == O_symbol
3444 && expP->X_add_number == 0);
3445 symp = expP->X_add_symbol;
3447 if (symp == symbolP)
3451 loop = concat (S_GET_NAME (symbolP),
3452 " => ", S_GET_NAME (symbolP2), NULL);
3455 while (symp != symbolP)
3457 char *old_loop = loop;
3458 symp = symbol_get_value_expression (symp)->X_add_symbol;
3459 loop = concat (loop, " => ", S_GET_NAME (symp), NULL);
3463 as_bad (_("%s: would close weakref loop: %s"),
3464 S_GET_NAME (symbolP), loop);
3469 ignore_rest_of_line ();
3473 /* Short-circuiting instead of just checking here might speed
3474 things up a tiny little bit, but loop error messages would
3475 miss intermediate links. */
3476 /* symbolP2 = symp; */
3481 memset (&exp, 0, sizeof (exp));
3482 exp.X_op = O_symbol;
3483 exp.X_add_symbol = symbolP2;
3485 S_SET_SEGMENT (symbolP, undefined_section);
3486 symbol_set_value_expression (symbolP, &exp);
3487 symbol_set_frag (symbolP, &zero_address_frag);
3488 S_SET_WEAKREFR (symbolP);
3490 demand_empty_rest_of_line ();
3494 /* Verify that we are at the end of a line. If not, issue an error and
3498 demand_empty_rest_of_line (void)
3501 if (is_end_of_line[(unsigned char) *input_line_pointer])
3502 input_line_pointer++;
3505 if (ISPRINT (*input_line_pointer))
3506 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3507 *input_line_pointer);
3509 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3510 *input_line_pointer);
3511 ignore_rest_of_line ();
3514 /* Return pointing just after end-of-line. */
3515 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3518 /* Silently advance to the end of line. Use this after already having
3519 issued an error about something bad. */
3522 ignore_rest_of_line (void)
3524 while (input_line_pointer < buffer_limit
3525 && !is_end_of_line[(unsigned char) *input_line_pointer])
3526 input_line_pointer++;
3528 input_line_pointer++;
3530 /* Return pointing just after end-of-line. */
3531 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3534 /* Sets frag for given symbol to zero_address_frag, except when the
3535 symbol frag is already set to a dummy listing frag. */
3538 set_zero_frag (symbolS *symbolP)
3540 if (symbol_get_frag (symbolP)->fr_type != rs_dummy)
3541 symbol_set_frag (symbolP, &zero_address_frag);
3544 /* In: Pointer to a symbol.
3545 Input_line_pointer->expression.
3547 Out: Input_line_pointer->just after any whitespace after expression.
3548 Tried to set symbol to value of expression.
3549 Will change symbols type, value, and frag; */
3552 pseudo_set (symbolS *symbolP)
3557 know (symbolP); /* NULL pointer is logic error. */
3559 if (!S_IS_FORWARD_REF (symbolP))
3560 (void) expression (&exp);
3562 (void) deferred_expression (&exp);
3564 if (exp.X_op == O_illegal)
3565 as_bad (_("illegal expression"));
3566 else if (exp.X_op == O_absent)
3567 as_bad (_("missing expression"));
3568 else if (exp.X_op == O_big)
3570 if (exp.X_add_number > 0)
3571 as_bad (_("bignum invalid"));
3573 as_bad (_("floating point number invalid"));
3575 else if (exp.X_op == O_subtract
3576 && !S_IS_FORWARD_REF (symbolP)
3577 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
3578 && (symbol_get_frag (exp.X_add_symbol)
3579 == symbol_get_frag (exp.X_op_symbol)))
3581 exp.X_op = O_constant;
3582 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
3583 - S_GET_VALUE (exp.X_op_symbol));
3586 if (symbol_section_p (symbolP))
3588 as_bad ("attempt to set value of section symbol");
3597 exp.X_add_number = 0;
3600 S_SET_SEGMENT (symbolP, absolute_section);
3601 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3602 set_zero_frag (symbolP);
3606 S_SET_SEGMENT (symbolP, reg_section);
3607 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3608 set_zero_frag (symbolP);
3609 symbol_get_value_expression (symbolP)->X_op = O_register;
3613 seg = S_GET_SEGMENT (exp.X_add_symbol);
3614 /* For x=undef+const, create an expression symbol.
3615 For x=x+const, just update x except when x is an undefined symbol
3616 For x=defined+const, evaluate x. */
3617 if (symbolP == exp.X_add_symbol
3618 && (seg != undefined_section
3619 || !symbol_constant_p (symbolP)))
3621 *symbol_X_add_number (symbolP) += exp.X_add_number;
3624 else if (!S_IS_FORWARD_REF (symbolP) && seg != undefined_section)
3626 symbolS *s = exp.X_add_symbol;
3628 if (S_IS_COMMON (s))
3629 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3630 S_GET_NAME (symbolP), S_GET_NAME (s));
3632 S_SET_SEGMENT (symbolP, seg);
3633 S_SET_VALUE (symbolP, exp.X_add_number + S_GET_VALUE (s));
3634 symbol_set_frag (symbolP, symbol_get_frag (s));
3635 copy_symbol_attributes (symbolP, s);
3638 S_SET_SEGMENT (symbolP, undefined_section);
3639 symbol_set_value_expression (symbolP, &exp);
3640 set_zero_frag (symbolP);
3644 /* The value is some complex expression. */
3645 S_SET_SEGMENT (symbolP, expr_section);
3646 symbol_set_value_expression (symbolP, &exp);
3647 set_zero_frag (symbolP);
3654 CONStruct more frag of .bytes, or .words etc.
3655 Should need_pass_2 be 1 then emit no frag(s).
3656 This understands EXPRESSIONS.
3660 This has a split personality. We use expression() to read the
3661 value. We can detect if the value won't fit in a byte or word.
3662 But we can't detect if expression() discarded significant digits
3663 in the case of a long. Not worth the crocks required to fix it. */
3665 /* Select a parser for cons expressions. */
3667 /* Some targets need to parse the expression in various fancy ways.
3668 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3669 (for example, the HPPA does this). Otherwise, you can define
3670 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3671 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3672 are defined, which is the normal case, then only simple expressions
3677 parse_mri_cons (expressionS *exp, unsigned int nbytes);
3680 #ifndef TC_PARSE_CONS_EXPRESSION
3681 #ifdef BITFIELD_CONS_EXPRESSIONS
3682 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3684 parse_bitfield_cons (expressionS *exp, unsigned int nbytes);
3686 #ifdef REPEAT_CONS_EXPRESSIONS
3687 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3689 parse_repeat_cons (expressionS *exp, unsigned int nbytes);
3692 /* If we haven't gotten one yet, just call expression. */
3693 #ifndef TC_PARSE_CONS_EXPRESSION
3694 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3699 do_parse_cons_expression (expressionS *exp,
3700 int nbytes ATTRIBUTE_UNUSED)
3702 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3706 /* Worker to do .byte etc statements.
3707 Clobbers input_line_pointer and checks end-of-line. */
3710 cons_worker (register int nbytes, /* 1=.byte, 2=.word, 4=.long. */
3718 #ifdef md_flush_pending_output
3719 md_flush_pending_output ();
3723 stop = mri_comment_field (&stopc);
3725 if (is_it_end_of_statement ())
3727 demand_empty_rest_of_line ();
3729 mri_comment_end (stop, stopc);
3733 #ifdef TC_ADDRESS_BYTES
3735 nbytes = TC_ADDRESS_BYTES ();
3738 #ifdef md_cons_align
3739 md_cons_align (nbytes);
3747 parse_mri_cons (&exp, (unsigned int) nbytes);
3750 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3754 if (exp.X_op == O_symbol)
3755 exp.X_op = O_symbol_rva;
3757 as_fatal (_("rva without symbol"));
3759 emit_expr (&exp, (unsigned int) nbytes);
3762 while (*input_line_pointer++ == ',');
3764 /* In MRI mode, after an odd number of bytes, we must align to an
3765 even word boundary, unless the next instruction is a dc.b, ds.b
3767 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3768 mri_pending_align = 1;
3770 input_line_pointer--; /* Put terminator back into stream. */
3772 demand_empty_rest_of_line ();
3775 mri_comment_end (stop, stopc);
3781 cons_worker (size, 0);
3787 cons_worker (size, 1);
3790 /* .reloc offset, reloc_name, symbol+addend. */
3793 s_reloc (int ignore ATTRIBUTE_UNUSED)
3800 struct reloc_list *reloc;
3802 reloc = xmalloc (sizeof (*reloc));
3805 stop = mri_comment_field (&stopc);
3814 as_bad (_("missing or bad offset expression"));
3817 exp.X_add_symbol = section_symbol (now_seg);
3818 exp.X_op = O_symbol;
3821 if (exp.X_add_number == 0)
3823 reloc->u.a.offset_sym = exp.X_add_symbol;
3828 reloc->u.a.offset_sym = make_expr_symbol (&exp);
3833 if (*input_line_pointer != ',')
3835 as_bad (_("missing reloc type"));
3839 ++input_line_pointer;
3841 r_name = input_line_pointer;
3842 c = get_symbol_end ();
3843 reloc->u.a.howto = bfd_reloc_name_lookup (stdoutput, r_name);
3844 *input_line_pointer = c;
3845 if (reloc->u.a.howto == NULL)
3847 as_bad (_("unrecognized reloc type"));
3851 exp.X_op = O_absent;
3853 if (*input_line_pointer == ',')
3855 ++input_line_pointer;
3856 expression_and_evaluate (&exp);
3863 as_bad (_("bad reloc expression"));
3865 ignore_rest_of_line ();
3868 mri_comment_end (stop, stopc);
3871 reloc->u.a.sym = NULL;
3872 reloc->u.a.addend = 0;
3875 reloc->u.a.sym = NULL;
3876 reloc->u.a.addend = exp.X_add_number;
3879 reloc->u.a.sym = exp.X_add_symbol;
3880 reloc->u.a.addend = exp.X_add_number;
3883 reloc->u.a.sym = make_expr_symbol (&exp);
3884 reloc->u.a.addend = 0;
3888 as_where (&reloc->file, &reloc->line);
3889 reloc->next = reloc_list;
3892 demand_empty_rest_of_line ();
3894 mri_comment_end (stop, stopc);
3897 /* Put the contents of expression EXP into the object file using
3898 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3901 emit_expr (expressionS *exp, unsigned int nbytes)
3905 valueT extra_digit = 0;
3907 /* Don't do anything if we are going to make another pass. */
3911 dot_value = frag_now_fix ();
3915 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3916 appear as a four byte positive constant in the .line section,
3917 followed by a 2 byte 0xffff. Look for that case here. */
3919 static int dwarf_line = -1;
3921 if (strcmp (segment_name (now_seg), ".line") != 0)
3923 else if (dwarf_line >= 0
3925 && exp->X_op == O_constant
3926 && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
3927 listing_source_line ((unsigned int) dwarf_line);
3928 else if (nbytes == 4
3929 && exp->X_op == O_constant
3930 && exp->X_add_number >= 0)
3931 dwarf_line = exp->X_add_number;
3936 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3937 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3938 AT_sibling (0x12) followed by a four byte address of the sibling
3939 followed by a 2 byte AT_name (0x38) followed by the name of the
3940 file. We look for that case here. */
3942 static int dwarf_file = 0;
3944 if (strcmp (segment_name (now_seg), ".debug") != 0)
3946 else if (dwarf_file == 0
3948 && exp->X_op == O_constant
3949 && exp->X_add_number == 0x11)
3951 else if (dwarf_file == 1
3953 && exp->X_op == O_constant
3954 && exp->X_add_number == 0x12)
3956 else if (dwarf_file == 2
3959 else if (dwarf_file == 3
3961 && exp->X_op == O_constant
3962 && exp->X_add_number == 0x38)
3967 /* The variable dwarf_file_string tells stringer that the string
3968 may be the name of the source file. */
3969 if (dwarf_file == 4)
3970 dwarf_file_string = 1;
3972 dwarf_file_string = 0;
3977 if (check_eh_frame (exp, &nbytes))
3982 /* Allow `.word 0' in the absolute section. */
3983 if (now_seg == absolute_section)
3985 if (op != O_constant || exp->X_add_number != 0)
3986 as_bad (_("attempt to store value in absolute section"));
3987 abs_section_offset += nbytes;
3991 /* Handle a negative bignum. */
3993 && exp->X_add_number == 0
3994 && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
3995 && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
3998 unsigned long carry;
4000 exp = symbol_get_value_expression (exp->X_add_symbol);
4002 /* Negate the bignum: one's complement each digit and add 1. */
4004 for (i = 0; i < exp->X_add_number; i++)
4008 next = (((~(generic_bignum[i] & LITTLENUM_MASK))
4011 generic_bignum[i] = next & LITTLENUM_MASK;
4012 carry = next >> LITTLENUM_NUMBER_OF_BITS;
4015 /* We can ignore any carry out, because it will be handled by
4016 extra_digit if it is needed. */
4018 extra_digit = (valueT) -1;
4022 if (op == O_absent || op == O_illegal)
4024 as_warn (_("zero assumed for missing expression"));
4025 exp->X_add_number = 0;
4028 else if (op == O_big && exp->X_add_number <= 0)
4030 as_bad (_("floating point number invalid"));
4031 exp->X_add_number = 0;
4034 else if (op == O_register)
4036 as_warn (_("register value used as expression"));
4040 p = frag_more ((int) nbytes);
4042 #ifndef WORKING_DOT_WORD
4043 /* If we have the difference of two symbols in a word, save it on
4044 the broken_words list. See the code in write.c. */
4045 if (op == O_subtract && nbytes == 2)
4047 struct broken_word *x;
4049 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
4050 x->next_broken_word = broken_words;
4053 x->subseg = now_subseg;
4055 x->word_goes_here = p;
4057 x->add = exp->X_add_symbol;
4058 x->sub = exp->X_op_symbol;
4059 x->addnum = exp->X_add_number;
4067 /* If we have an integer, but the number of bytes is too large to
4068 pass to md_number_to_chars, handle it as a bignum. */
4069 if (op == O_constant && nbytes > sizeof (valueT))
4071 extra_digit = exp->X_unsigned ? 0 : -1;
4072 convert_to_bignum (exp);
4076 if (op == O_constant)
4078 register valueT get;
4079 register valueT use;
4080 register valueT mask;
4082 register valueT unmask;
4084 /* JF << of >= number of bits in the object is undefined. In
4085 particular SPARC (Sun 4) has problems. */
4086 if (nbytes >= sizeof (valueT))
4089 if (nbytes > sizeof (valueT))
4092 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
4096 /* Don't store these bits. */
4097 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
4098 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
4101 unmask = ~mask; /* Do store these bits. */
4104 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
4105 mask = ~(unmask >> 1); /* Includes sign bit now. */
4108 get = exp->X_add_number;
4110 if ((get & mask) != 0
4111 && ((get & mask) != mask
4112 || (get & hibit) == 0))
4113 { /* Leading bits contain both 0s & 1s. */
4114 #if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG
4115 as_warn (_("value 0x%llx truncated to 0x%llx"),
4116 (unsigned long long) get, (unsigned long long) use);
4118 as_warn (_("value 0x%lx truncated to 0x%lx"),
4119 (unsigned long) get, (unsigned long) use);
4122 /* Put bytes in right order. */
4123 md_number_to_chars (p, use, (int) nbytes);
4125 else if (op == O_big)
4128 LITTLENUM_TYPE *nums;
4130 know (nbytes % CHARS_PER_LITTLENUM == 0);
4132 size = exp->X_add_number * CHARS_PER_LITTLENUM;
4135 as_warn (_("bignum truncated to %d bytes"), nbytes);
4139 if (target_big_endian)
4141 while (nbytes > size)
4143 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
4144 nbytes -= CHARS_PER_LITTLENUM;
4145 p += CHARS_PER_LITTLENUM;
4148 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
4149 while (size >= CHARS_PER_LITTLENUM)
4152 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
4153 size -= CHARS_PER_LITTLENUM;
4154 p += CHARS_PER_LITTLENUM;
4159 nums = generic_bignum;
4160 while (size >= CHARS_PER_LITTLENUM)
4162 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
4164 size -= CHARS_PER_LITTLENUM;
4165 p += CHARS_PER_LITTLENUM;
4166 nbytes -= CHARS_PER_LITTLENUM;
4169 while (nbytes >= CHARS_PER_LITTLENUM)
4171 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
4172 nbytes -= CHARS_PER_LITTLENUM;
4173 p += CHARS_PER_LITTLENUM;
4178 emit_expr_fix (exp, nbytes, frag_now, p);
4182 emit_expr_fix (expressionS *exp, unsigned int nbytes, fragS *frag, char *p)
4184 memset (p, 0, nbytes);
4186 /* Generate a fixS to record the symbol value. */
4188 #ifdef TC_CONS_FIX_NEW
4189 TC_CONS_FIX_NEW (frag, p - frag->fr_literal, nbytes, exp);
4192 bfd_reloc_code_real_type r;
4209 as_bad (_("unsupported BFD relocation size %u"), nbytes);
4213 fix_new_exp (frag, p - frag->fr_literal, (int) nbytes, exp,
4219 #ifdef BITFIELD_CONS_EXPRESSIONS
4221 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
4222 w:x,y:z, where w and y are bitwidths and x and y are values. They
4223 then pack them all together. We do a little better in that we allow
4224 them in words, longs, etc. and we'll pack them in target byte order
4227 The rules are: pack least significant bit first, if a field doesn't
4228 entirely fit, put it in the next unit. Overflowing the bitfield is
4229 explicitly *not* even a warning. The bitwidth should be considered
4232 To use this function the tc-XXX.h file should define
4233 BITFIELD_CONS_EXPRESSIONS. */
4236 parse_bitfield_cons (exp, nbytes)
4238 unsigned int nbytes;
4240 unsigned int bits_available = BITS_PER_CHAR * nbytes;
4241 char *hold = input_line_pointer;
4243 (void) expression (exp);
4245 if (*input_line_pointer == ':')
4252 unsigned long width;
4254 if (*input_line_pointer != ':')
4256 input_line_pointer = hold;
4258 } /* Next piece is not a bitfield. */
4260 /* In the general case, we can't allow
4261 full expressions with symbol
4262 differences and such. The relocation
4263 entries for symbols not defined in this
4264 assembly would require arbitrary field
4265 widths, positions, and masks which most
4266 of our current object formats don't
4269 In the specific case where a symbol
4270 *is* defined in this assembly, we
4271 *could* build fixups and track it, but
4272 this could lead to confusion for the
4273 backends. I'm lazy. I'll take any
4274 SEG_ABSOLUTE. I think that means that
4275 you can use a previous .set or
4276 .equ type symbol. xoxorich. */
4278 if (exp->X_op == O_absent)
4280 as_warn (_("using a bit field width of zero"));
4281 exp->X_add_number = 0;
4282 exp->X_op = O_constant;
4283 } /* Implied zero width bitfield. */
4285 if (exp->X_op != O_constant)
4287 *input_line_pointer = '\0';
4288 as_bad (_("field width \"%s\" too complex for a bitfield"), hold);
4289 *input_line_pointer = ':';
4290 demand_empty_rest_of_line ();
4292 } /* Too complex. */
4294 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
4296 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4297 width, nbytes, (BITS_PER_CHAR * nbytes));
4298 width = BITS_PER_CHAR * nbytes;
4301 if (width > bits_available)
4303 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4304 input_line_pointer = hold;
4305 exp->X_add_number = value;
4310 hold = ++input_line_pointer;
4312 (void) expression (exp);
4313 if (exp->X_op != O_constant)
4315 char cache = *input_line_pointer;
4317 *input_line_pointer = '\0';
4318 as_bad (_("field value \"%s\" too complex for a bitfield"), hold);
4319 *input_line_pointer = cache;
4320 demand_empty_rest_of_line ();
4322 } /* Too complex. */
4324 value |= ((~(-1 << width) & exp->X_add_number)
4325 << ((BITS_PER_CHAR * nbytes) - bits_available));
4327 if ((bits_available -= width) == 0
4328 || is_it_end_of_statement ()
4329 || *input_line_pointer != ',')
4332 } /* All the bitfields we're gonna get. */
4334 hold = ++input_line_pointer;
4335 (void) expression (exp);
4338 exp->X_add_number = value;
4339 exp->X_op = O_constant;
4340 exp->X_unsigned = 1;
4344 #endif /* BITFIELD_CONS_EXPRESSIONS */
4346 /* Handle an MRI style string expression. */
4350 parse_mri_cons (exp, nbytes)
4352 unsigned int nbytes;
4354 if (*input_line_pointer != '\''
4355 && (input_line_pointer[1] != '\''
4356 || (*input_line_pointer != 'A'
4357 && *input_line_pointer != 'E')))
4358 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
4362 unsigned int result = 0;
4364 /* An MRI style string. Cut into as many bytes as will fit into
4365 a nbyte chunk, left justify if necessary, and separate with
4366 commas so we can try again later. */
4367 if (*input_line_pointer == 'A')
4368 ++input_line_pointer;
4369 else if (*input_line_pointer == 'E')
4371 as_bad (_("EBCDIC constants are not supported"));
4372 ++input_line_pointer;
4375 input_line_pointer++;
4376 for (scan = 0; scan < nbytes; scan++)
4378 if (*input_line_pointer == '\'')
4380 if (input_line_pointer[1] == '\'')
4382 input_line_pointer++;
4387 result = (result << 8) | (*input_line_pointer++);
4391 while (scan < nbytes)
4397 /* Create correct expression. */
4398 exp->X_op = O_constant;
4399 exp->X_add_number = result;
4401 /* Fake it so that we can read the next char too. */
4402 if (input_line_pointer[0] != '\'' ||
4403 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
4405 input_line_pointer -= 2;
4406 input_line_pointer[0] = ',';
4407 input_line_pointer[1] = '\'';
4410 input_line_pointer++;
4413 #endif /* TC_M68K */
4415 #ifdef REPEAT_CONS_EXPRESSIONS
4417 /* Parse a repeat expression for cons. This is used by the MIPS
4418 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4419 object file COUNT times.
4421 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4424 parse_repeat_cons (exp, nbytes)
4426 unsigned int nbytes;
4433 if (*input_line_pointer != ':')
4435 /* No repeat count. */
4439 ++input_line_pointer;
4440 expression (&count);
4441 if (count.X_op != O_constant
4442 || count.X_add_number <= 0)
4444 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4448 /* The cons function is going to output this expression once. So we
4449 output it count - 1 times. */
4450 for (i = count.X_add_number - 1; i > 0; i--)
4451 emit_expr (exp, nbytes);
4454 #endif /* REPEAT_CONS_EXPRESSIONS */
4456 /* Parse a floating point number represented as a hex constant. This
4457 permits users to specify the exact bits they want in the floating
4461 hex_float (int float_type, char *bytes)
4493 as_bad (_("unknown floating type type '%c'"), float_type);
4497 /* It would be nice if we could go through expression to parse the
4498 hex constant, but if we get a bignum it's a pain to sort it into
4499 the buffer correctly. */
4501 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
4505 /* The MRI assembler accepts arbitrary underscores strewn about
4506 through the hex constant, so we ignore them as well. */
4507 if (*input_line_pointer == '_')
4509 ++input_line_pointer;
4515 as_warn (_("floating point constant too large"));
4518 d = hex_value (*input_line_pointer) << 4;
4519 ++input_line_pointer;
4520 while (*input_line_pointer == '_')
4521 ++input_line_pointer;
4522 if (hex_p (*input_line_pointer))
4524 d += hex_value (*input_line_pointer);
4525 ++input_line_pointer;
4527 if (target_big_endian)
4530 bytes[length - i - 1] = d;
4536 if (target_big_endian)
4537 memset (bytes + i, 0, length - i);
4539 memset (bytes, 0, length - i);
4547 CONStruct some more frag chars of .floats .ffloats etc.
4548 Makes 0 or more new frags.
4549 If need_pass_2 == 1, no frags are emitted.
4550 This understands only floating literals, not expressions. Sorry.
4552 A floating constant is defined by atof_generic(), except it is preceded
4553 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4554 reading, I decided to be incompatible. This always tries to give you
4555 rounded bits to the precision of the pseudo-op. Former AS did premature
4556 truncation, restored noisy bits instead of trailing 0s AND gave you
4557 a choice of 2 flavours of noise according to which of 2 floating-point
4558 scanners you directed AS to use.
4560 In: input_line_pointer->whitespace before, or '0' of flonum. */
4563 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4564 register int float_type /* 'f':.ffloat ... 'F':.float ... */)
4567 int length; /* Number of chars in an object. */
4568 register char *err; /* Error from scanning floating literal. */
4569 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
4571 if (is_it_end_of_statement ())
4573 demand_empty_rest_of_line ();
4577 #ifdef md_flush_pending_output
4578 md_flush_pending_output ();
4583 /* input_line_pointer->1st char of a flonum (we hope!). */
4586 /* Skip any 0{letter} that may be present. Don't even check if the
4587 letter is legal. Someone may invent a "z" format and this routine
4588 has no use for such information. Lusers beware: you get
4589 diagnostics if your input is ill-conditioned. */
4590 if (input_line_pointer[0] == '0'
4591 && ISALPHA (input_line_pointer[1]))
4592 input_line_pointer += 2;
4594 /* Accept :xxxx, where the x's are hex digits, for a floating
4595 point with the exact digits specified. */
4596 if (input_line_pointer[0] == ':')
4598 ++input_line_pointer;
4599 length = hex_float (float_type, temp);
4602 ignore_rest_of_line ();
4608 err = md_atof (float_type, temp, &length);
4609 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
4610 know (err != NULL || length > 0);
4613 as_bad (_("bad floating literal: %s"), err);
4614 ignore_rest_of_line ();
4625 #ifdef REPEAT_CONS_EXPRESSIONS
4626 if (*input_line_pointer == ':')
4628 expressionS count_exp;
4630 ++input_line_pointer;
4631 expression (&count_exp);
4633 if (count_exp.X_op != O_constant
4634 || count_exp.X_add_number <= 0)
4635 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4637 count = count_exp.X_add_number;
4641 while (--count >= 0)
4643 p = frag_more (length);
4644 memcpy (p, temp, (unsigned int) length);
4649 while (*input_line_pointer++ == ',');
4651 /* Put terminator back into stream. */
4652 --input_line_pointer;
4653 demand_empty_rest_of_line ();
4656 /* Return the size of a LEB128 value. */
4659 sizeof_sleb128 (offsetT value)
4661 register int size = 0;
4662 register unsigned byte;
4666 byte = (value & 0x7f);
4667 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4668 Fortunately, we can structure things so that the extra work reduces
4669 to a noop on systems that do things "properly". */
4670 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4673 while (!(((value == 0) && ((byte & 0x40) == 0))
4674 || ((value == -1) && ((byte & 0x40) != 0))));
4680 sizeof_uleb128 (valueT value)
4682 register int size = 0;
4683 register unsigned byte;
4687 byte = (value & 0x7f);
4697 sizeof_leb128 (valueT value, int sign)
4700 return sizeof_sleb128 ((offsetT) value);
4702 return sizeof_uleb128 (value);
4705 /* Output a LEB128 value. */
4708 output_sleb128 (char *p, offsetT value)
4710 register char *orig = p;
4715 unsigned byte = (value & 0x7f);
4717 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4718 Fortunately, we can structure things so that the extra work reduces
4719 to a noop on systems that do things "properly". */
4720 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4722 more = !((((value == 0) && ((byte & 0x40) == 0))
4723 || ((value == -1) && ((byte & 0x40) != 0))));
4735 output_uleb128 (char *p, valueT value)
4741 unsigned byte = (value & 0x7f);
4744 /* More bytes to follow. */
4755 output_leb128 (char *p, valueT value, int sign)
4758 return output_sleb128 (p, (offsetT) value);
4760 return output_uleb128 (p, value);
4763 /* Do the same for bignums. We combine sizeof with output here in that
4764 we don't output for NULL values of P. It isn't really as critical as
4765 for "normal" values that this be streamlined. */
4768 output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
4775 /* Strip leading sign extensions off the bignum. */
4777 && bignum[size - 1] == LITTLENUM_MASK
4778 && bignum[size - 2] > LITTLENUM_MASK / 2)
4783 /* OR in the next part of the littlenum. */
4784 val |= (*bignum << loaded);
4785 loaded += LITTLENUM_NUMBER_OF_BITS;
4789 /* Add bytes until there are less than 7 bits left in VAL
4790 or until every non-sign bit has been written. */
4797 || val != ((byte & 0x40) == 0 ? 0 : ((valueT) 1 << loaded) - 1))
4804 while ((byte & 0x80) != 0 && loaded >= 7);
4808 /* Mop up any left-over bits (of which there will be less than 7). */
4809 if ((byte & 0x80) != 0)
4811 /* Sign-extend VAL. */
4812 if (val & (1 << (loaded - 1)))
4813 val |= ~0 << loaded;
4823 output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
4830 /* Strip leading zeros off the bignum. */
4831 /* XXX: Is this needed? */
4832 while (size > 0 && bignum[size - 1] == 0)
4837 if (loaded < 7 && size > 0)
4839 val |= (*bignum << loaded);
4840 loaded += 8 * CHARS_PER_LITTLENUM;
4849 if (size > 0 || val)
4856 while (byte & 0x80);
4862 output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, int size, int sign)
4865 return output_big_sleb128 (p, bignum, size);
4867 return output_big_uleb128 (p, bignum, size);
4870 /* Generate the appropriate fragments for a given expression to emit a
4874 emit_leb128_expr (expressionS *exp, int sign)
4876 operatorT op = exp->X_op;
4877 unsigned int nbytes;
4879 if (op == O_absent || op == O_illegal)
4881 as_warn (_("zero assumed for missing expression"));
4882 exp->X_add_number = 0;
4885 else if (op == O_big && exp->X_add_number <= 0)
4887 as_bad (_("floating point number invalid"));
4888 exp->X_add_number = 0;
4891 else if (op == O_register)
4893 as_warn (_("register value used as expression"));
4896 else if (op == O_constant
4898 && (exp->X_add_number < 0) != !exp->X_unsigned)
4900 /* We're outputting a signed leb128 and the sign of X_add_number
4901 doesn't reflect the sign of the original value. Convert EXP
4902 to a correctly-extended bignum instead. */
4903 convert_to_bignum (exp);
4907 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
4908 a signal that this is leb128 data. It shouldn't optimize this away. */
4909 nbytes = (unsigned int) -1;
4910 if (check_eh_frame (exp, &nbytes))
4913 /* Let the backend know that subsequent data may be byte aligned. */
4914 #ifdef md_cons_align
4918 if (op == O_constant)
4920 /* If we've got a constant, emit the thing directly right now. */
4922 valueT value = exp->X_add_number;
4926 size = sizeof_leb128 (value, sign);
4927 p = frag_more (size);
4928 output_leb128 (p, value, sign);
4930 else if (op == O_big)
4932 /* O_big is a different sort of constant. */
4937 size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
4938 p = frag_more (size);
4939 output_big_leb128 (p, generic_bignum, exp->X_add_number, sign);
4943 /* Otherwise, we have to create a variable sized fragment and
4944 resolve things later. */
4946 frag_var (rs_leb128, sizeof_uleb128 (~(valueT) 0), 0, sign,
4947 make_expr_symbol (exp), 0, (char *) NULL);
4951 /* Parse the .sleb128 and .uleb128 pseudos. */
4958 #ifdef md_flush_pending_output
4959 md_flush_pending_output ();
4965 emit_leb128_expr (&exp, sign);
4967 while (*input_line_pointer++ == ',');
4969 input_line_pointer--;
4970 demand_empty_rest_of_line ();
4974 stringer_append_char (int c, int bitsize)
4976 if (!target_big_endian)
4977 FRAG_APPEND_1_CHAR (c);
4982 FRAG_APPEND_1_CHAR (0);
4983 FRAG_APPEND_1_CHAR (0);
4984 FRAG_APPEND_1_CHAR (0);
4985 FRAG_APPEND_1_CHAR (0);
4988 FRAG_APPEND_1_CHAR (0);
4989 FRAG_APPEND_1_CHAR (0);
4992 FRAG_APPEND_1_CHAR (0);
4997 /* Called with invalid bitsize argument. */
5001 if (target_big_endian)
5002 FRAG_APPEND_1_CHAR (c);
5005 /* Worker to do .ascii etc statements.
5006 Reads 0 or more ',' separated, double-quoted strings.
5007 Caller should have checked need_pass_2 is FALSE because we don't
5009 Checks for end-of-line.
5010 BITS_APPENDZERO says how many bits are in a target char.
5011 The bottom bit is set if a NUL char should be appended to the strings. */
5014 stringer (int bits_appendzero)
5016 const int bitsize = bits_appendzero & ~7;
5017 const int append_zero = bits_appendzero & 1;
5021 #ifdef md_flush_pending_output
5022 md_flush_pending_output ();
5025 /* The following awkward logic is to parse ZERO or more strings,
5026 comma separated. Recall a string expression includes spaces
5027 before the opening '\"' and spaces after the closing '\"'.
5028 We fake a leading ',' if there is (supposed to be)
5029 a 1st, expression. We keep demanding expressions for each ','. */
5030 if (is_it_end_of_statement ())
5032 c = 0; /* Skip loop. */
5033 ++input_line_pointer; /* Compensate for end of loop. */
5037 c = ','; /* Do loop. */
5039 /* If we have been switched into the abs_section then we
5040 will not have an obstack onto which we can hang strings. */
5041 if (now_seg == absolute_section)
5043 as_bad (_("strings must be placed into a section"));
5045 ignore_rest_of_line ();
5048 while (c == ',' || c == '<' || c == '"')
5051 switch (*input_line_pointer)
5054 ++input_line_pointer; /*->1st char of string. */
5055 start = input_line_pointer;
5057 while (is_a_char (c = next_char_of_string ()))
5058 stringer_append_char (c, bitsize);
5061 stringer_append_char (0, bitsize);
5063 know (input_line_pointer[-1] == '\"');
5067 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
5068 will emit .string with a filename in the .debug section
5069 after a sequence of constants. See the comment in
5070 emit_expr for the sequence. emit_expr will set
5071 dwarf_file_string to non-zero if this string might be a
5072 source file name. */
5073 if (strcmp (segment_name (now_seg), ".debug") != 0)
5074 dwarf_file_string = 0;
5075 else if (dwarf_file_string)
5077 c = input_line_pointer[-1];
5078 input_line_pointer[-1] = '\0';
5079 listing_source_file (start);
5080 input_line_pointer[-1] = c;
5087 input_line_pointer++;
5088 c = get_single_number ();
5089 stringer_append_char (c, bitsize);
5090 if (*input_line_pointer != '>')
5091 as_bad (_("expected <nn>"));
5093 input_line_pointer++;
5096 input_line_pointer++;
5100 c = *input_line_pointer;
5103 demand_empty_rest_of_line ();
5106 /* FIXME-SOMEDAY: I had trouble here on characters with the
5107 high bits set. We'll probably also have trouble with
5108 multibyte chars, wide chars, etc. Also be careful about
5109 returning values bigger than 1 byte. xoxorich. */
5112 next_char_of_string (void)
5114 register unsigned int c;
5116 c = *input_line_pointer++ & CHAR_MASK;
5124 as_warn (_("unterminated string; newline inserted"));
5125 bump_line_counters ();
5128 #ifndef NO_STRING_ESCAPES
5130 switch (c = *input_line_pointer++)
5158 break; /* As itself. */
5174 for (i = 0, number = 0;
5175 ISDIGIT (c) && i < 3;
5176 c = *input_line_pointer++, i++)
5178 number = number * 8 + c - '0';
5183 --input_line_pointer;
5192 c = *input_line_pointer++;
5193 while (ISXDIGIT (c))
5196 number = number * 16 + c - '0';
5197 else if (ISUPPER (c))
5198 number = number * 16 + c - 'A' + 10;
5200 number = number * 16 + c - 'a' + 10;
5201 c = *input_line_pointer++;
5204 --input_line_pointer;
5209 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
5210 as_warn (_("unterminated string; newline inserted"));
5212 bump_line_counters ();
5217 #ifdef ONLY_STANDARD_ESCAPES
5218 as_bad (_("bad escaped character in string"));
5220 #endif /* ONLY_STANDARD_ESCAPES */
5225 #endif /* ! defined (NO_STRING_ESCAPES) */
5234 get_segmented_expression (register expressionS *expP)
5236 register segT retval;
5238 retval = expression (expP);
5239 if (expP->X_op == O_illegal
5240 || expP->X_op == O_absent
5241 || expP->X_op == O_big)
5243 as_bad (_("expected address expression"));
5244 expP->X_op = O_constant;
5245 expP->X_add_number = 0;
5246 retval = absolute_section;
5252 get_known_segmented_expression (register expressionS *expP)
5254 register segT retval;
5256 if ((retval = get_segmented_expression (expP)) == undefined_section)
5258 /* There is no easy way to extract the undefined symbol from the
5260 if (expP->X_add_symbol != NULL
5261 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
5262 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5263 S_GET_NAME (expP->X_add_symbol));
5265 as_warn (_("some symbol undefined; zero assumed"));
5266 retval = absolute_section;
5267 expP->X_op = O_constant;
5268 expP->X_add_number = 0;
5270 know (retval == absolute_section || SEG_NORMAL (retval));
5274 char /* Return terminator. */
5275 get_absolute_expression_and_terminator (long *val_pointer /* Return value of expression. */)
5277 /* FIXME: val_pointer should probably be offsetT *. */
5278 *val_pointer = (long) get_absolute_expression ();
5279 return (*input_line_pointer++);
5282 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
5283 Give a warning if that happens. */
5286 demand_copy_C_string (int *len_pointer)
5290 if ((s = demand_copy_string (len_pointer)) != 0)
5294 for (len = *len_pointer; len > 0; len--)
5301 as_bad (_("this string may not contain \'\\0\'"));
5309 /* Demand string, but return a safe (=private) copy of the string.
5310 Return NULL if we can't read a string here. */
5313 demand_copy_string (int *lenP)
5315 register unsigned int c;
5321 if (*input_line_pointer == '\"')
5323 input_line_pointer++; /* Skip opening quote. */
5325 while (is_a_char (c = next_char_of_string ()))
5327 obstack_1grow (¬es, c);
5330 /* JF this next line is so demand_copy_C_string will return a
5331 null terminated string. */
5332 obstack_1grow (¬es, '\0');
5333 retval = obstack_finish (¬es);
5337 as_bad (_("missing string"));
5339 ignore_rest_of_line ();
5345 /* In: Input_line_pointer->next character.
5347 Do: Skip input_line_pointer over all whitespace.
5349 Out: 1 if input_line_pointer->end-of-line. */
5352 is_it_end_of_statement (void)
5355 return (is_end_of_line[(unsigned char) *input_line_pointer]);
5359 equals (char *sym_name, int reassign)
5364 input_line_pointer++;
5365 if (*input_line_pointer == '=')
5366 input_line_pointer++;
5367 if (reassign < 0 && *input_line_pointer == '=')
5368 input_line_pointer++;
5370 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
5371 input_line_pointer++;
5374 stop = mri_comment_field (&stopc);
5376 assign_symbol (sym_name, reassign >= 0 ? !reassign : reassign);
5380 demand_empty_rest_of_line ();
5381 mri_comment_end (stop, stopc);
5385 /* .incbin -- include a file verbatim at the current location. */
5388 s_incbin (int x ATTRIBUTE_UNUSED)
5399 #ifdef md_flush_pending_output
5400 md_flush_pending_output ();
5404 filename = demand_copy_string (& len);
5405 if (filename == NULL)
5410 /* Look for optional skip and count. */
5411 if (* input_line_pointer == ',')
5413 ++ input_line_pointer;
5414 skip = get_absolute_expression ();
5418 if (* input_line_pointer == ',')
5420 ++ input_line_pointer;
5422 count = get_absolute_expression ();
5424 as_warn (_(".incbin count zero, ignoring `%s'"), filename);
5430 demand_empty_rest_of_line ();
5432 /* Try opening absolute path first, then try include dirs. */
5433 binfile = fopen (filename, FOPEN_RB);
5434 if (binfile == NULL)
5438 path = xmalloc ((unsigned long) len + include_dir_maxlen + 5);
5440 for (i = 0; i < include_dir_count; i++)
5442 sprintf (path, "%s/%s", include_dirs[i], filename);
5444 binfile = fopen (path, FOPEN_RB);
5445 if (binfile != NULL)
5449 if (binfile == NULL)
5450 as_bad (_("file not found: %s"), filename);
5453 path = xstrdup (filename);
5459 register_dependency (path);
5461 /* Compute the length of the file. */
5462 if (fseek (binfile, 0, SEEK_END) != 0)
5464 as_bad (_("seek to end of .incbin file failed `%s'"), path);
5467 file_len = ftell (binfile);
5469 /* If a count was not specified use the remainder of the file. */
5471 count = file_len - skip;
5473 if (skip < 0 || count < 0 || file_len < 0 || skip + count > file_len)
5475 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5476 skip, count, file_len);
5480 if (fseek (binfile, skip, SEEK_SET) != 0)
5482 as_bad (_("could not skip to %ld in file `%s'"), skip, path);
5486 /* Allocate frag space and store file contents in it. */
5487 binfrag = frag_more (count);
5489 bytes = fread (binfrag, 1, count, binfile);
5491 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5492 path, bytes, count);
5495 if (binfile != NULL)
5501 /* .include -- include a file at this point. */
5504 s_include (int arg ATTRIBUTE_UNUSED)
5513 filename = demand_copy_string (&i);
5514 if (filename == NULL)
5516 /* demand_copy_string has already printed an error and
5517 called ignore_rest_of_line. */
5525 while (!is_end_of_line[(unsigned char) *input_line_pointer]
5526 && *input_line_pointer != ' '
5527 && *input_line_pointer != '\t')
5529 obstack_1grow (¬es, *input_line_pointer);
5530 ++input_line_pointer;
5534 obstack_1grow (¬es, '\0');
5535 filename = obstack_finish (¬es);
5536 while (!is_end_of_line[(unsigned char) *input_line_pointer])
5537 ++input_line_pointer;
5540 demand_empty_rest_of_line ();
5541 path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ );
5543 for (i = 0; i < include_dir_count; i++)
5545 strcpy (path, include_dirs[i]);
5547 strcat (path, filename);
5548 if (0 != (try = fopen (path, FOPEN_RT)))
5558 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5559 register_dependency (path);
5560 input_scrub_insert_file (path);
5564 add_include_dir (char *path)
5568 if (include_dir_count == 0)
5570 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
5571 include_dirs[0] = "."; /* Current dir. */
5572 include_dir_count = 2;
5576 include_dir_count++;
5578 (char **) realloc (include_dirs,
5579 include_dir_count * sizeof (*include_dirs));
5582 include_dirs[include_dir_count - 1] = path; /* New one. */
5585 if (i > include_dir_maxlen)
5586 include_dir_maxlen = i;
5589 /* Output debugging information to denote the source file. */
5592 generate_file_debug (void)
5594 if (debug_type == DEBUG_STABS)
5595 stabs_generate_asm_file ();
5598 /* Output line number debugging information for the current source line. */
5601 generate_lineno_debug (void)
5605 case DEBUG_UNSPECIFIED:
5610 stabs_generate_asm_lineno ();
5613 ecoff_generate_asm_lineno ();
5616 /* ??? We could here indicate to dwarf2dbg.c that something
5617 has changed. However, since there is additional backend
5618 support that is required (calling dwarf2_emit_insn), we
5619 let dwarf2dbg.c call as_where on its own. */
5624 /* Output debugging information to mark a function entry point or end point.
5625 END_P is zero for .func, and non-zero for .endfunc. */
5630 do_s_func (end_p, NULL);
5633 /* Subroutine of s_func so targets can choose a different default prefix.
5634 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5637 do_s_func (int end_p, const char *default_prefix)
5639 /* Record the current function so that we can issue an error message for
5640 misplaced .func,.endfunc, and also so that .endfunc needs no
5642 static char *current_name;
5643 static char *current_label;
5647 if (current_name == NULL)
5649 as_bad (_("missing .func"));
5650 ignore_rest_of_line ();
5654 if (debug_type == DEBUG_STABS)
5655 stabs_generate_asm_endfunc (current_name, current_label);
5657 current_name = current_label = NULL;
5662 char delim1, delim2;
5664 if (current_name != NULL)
5666 as_bad (_(".endfunc missing for previous .func"));
5667 ignore_rest_of_line ();
5671 name = input_line_pointer;
5672 delim1 = get_symbol_end ();
5673 name = xstrdup (name);
5674 *input_line_pointer = delim1;
5676 if (*input_line_pointer != ',')
5680 if (asprintf (&label, "%s%s", default_prefix, name) == -1)
5681 as_fatal ("%s", xstrerror (errno));
5685 char leading_char = bfd_get_symbol_leading_char (stdoutput);
5686 /* Missing entry point, use function's name with the leading
5690 if (asprintf (&label, "%c%s", leading_char, name) == -1)
5691 as_fatal ("%s", xstrerror (errno));
5699 ++input_line_pointer;
5701 label = input_line_pointer;
5702 delim2 = get_symbol_end ();
5703 label = xstrdup (label);
5704 *input_line_pointer = delim2;
5707 if (debug_type == DEBUG_STABS)
5708 stabs_generate_asm_func (name, label);
5710 current_name = name;
5711 current_label = label;
5714 demand_empty_rest_of_line ();
5718 s_ignore (int arg ATTRIBUTE_UNUSED)
5720 ignore_rest_of_line ();
5724 read_print_statistics (FILE *file)
5726 hash_print_statistics (file, "pseudo-op table", po_hash);
5729 /* Inserts the given line into the input stream.
5731 This call avoids macro/conditionals nesting checking, since the contents of
5732 the line are assumed to replace the contents of a line already scanned.
5734 An appropriate use of this function would be substitution of input lines when
5735 called by md_start_line_hook(). The given line is assumed to already be
5736 properly scrubbed. */
5739 input_scrub_insert_line (const char *line)
5743 sb_add_string (&newline, line);
5744 input_scrub_include_sb (&newline, input_line_pointer, 0);
5746 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5749 /* Insert a file into the input stream; the path must resolve to an actual
5750 file; no include path searching or dependency registering is performed. */
5753 input_scrub_insert_file (char *path)
5755 input_scrub_include_file (path, input_line_pointer);
5756 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5759 /* Find the end of a line, considering quotation and escaping of quotes. */
5761 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5762 # define TC_SINGLE_QUOTE_STRINGS 1
5766 _find_end_of_line (char *s, int mri_string, int insn ATTRIBUTE_UNUSED)
5768 char inquote = '\0';
5771 while (!is_end_of_line[(unsigned char) *s]
5772 || (inquote && !ISCNTRL (*s))
5773 || (inquote == '\'' && flag_mri)
5774 #ifdef TC_EOL_IN_INSN
5775 || (insn && TC_EOL_IN_INSN (s))
5779 if (mri_string && *s == '\'')
5783 else if (*s == '\\')
5787 #ifdef TC_SINGLE_QUOTE_STRINGS
5788 || (TC_SINGLE_QUOTE_STRINGS && *s == '\'')
5795 as_warn (_("missing closing `%c'"), inquote);
5797 as_warn (_("stray `\\'"));
5802 find_end_of_line (char *s, int mri_string)
5804 return _find_end_of_line (s, mri_string, 0);