1 /* read.c - read a source file -
2 Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
3 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
4 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
23 /* If your chars aren't 8 bits, you will change this a bit (eg. to 0xFF).
24 But then, GNU isn't spozed to run on your machine anyway.
25 (RMS is so shortsighted sometimes.) */
26 #define MASK_CHAR ((int)(unsigned char) -1)
28 /* This is the largest known floating point format (for now). It will
29 grow when we do 4361 style flonums. */
30 #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
32 /* Routines that read assembler source text to build spaghetti in memory.
33 Another group of these functions is in the expr.c module. */
36 #include "safe-ctype.h"
42 #include "dw2gencfi.h"
44 #ifndef TC_START_LABEL
45 #define TC_START_LABEL(x,y) (x == ':')
48 /* Set by the object-format or the target. */
49 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
50 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
55 else if ((SIZE) >= 4) \
57 else if ((SIZE) >= 2) \
65 char *input_line_pointer; /*->next char of source file to parse. */
67 #if BITS_PER_CHAR != 8
68 /* The following table is indexed by[(char)] and will break if
69 a char does not have exactly 256 states (hopefully 0:255!)! */
78 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
83 /* The Delta 68k assembler permits % inside label names. */
88 /* The PowerPC Windows NT assemblers permits ? inside label names. */
93 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
94 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
103 /* The Delta 68k assembler permits ~ at start of label names. */
107 /* Used by is_... macros. our ctype[]. */
108 char lex_type[256] = {
109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
110 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
111 0, 0, 0, LEX_HASH, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
112 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
113 LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
114 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
115 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
116 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */
117 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
118 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
119 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
120 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
121 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
122 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
123 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
124 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
128 Out: 1 if this character ends a line. */
129 char is_end_of_line[256] = {
131 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
133 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
135 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
136 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
137 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
140 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
141 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
142 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
143 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
144 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
145 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
146 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
147 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
148 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
152 #ifndef TC_CASE_SENSITIVE
153 char original_case_string[128];
156 /* Functions private to this file. */
158 static char *buffer; /* 1st char of each buffer of lines is here. */
159 static char *buffer_limit; /*->1 + last char in buffer. */
161 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
162 in the tc-<CPU>.h file. See the "Porting GAS" section of the
164 int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
166 /* Variables for handling include file directory table. */
168 /* Table of pointers to directories to search for .include's. */
171 /* How many are in the table. */
172 int include_dir_count;
174 /* Length of longest in table. */
175 int include_dir_maxlen = 1;
177 #ifndef WORKING_DOT_WORD
178 struct broken_word *broken_words;
179 int new_broken_words;
182 /* The current offset into the absolute section. We don't try to
183 build frags in the absolute section, since no data can be stored
184 there. We just keep track of the current offset. */
185 addressT abs_section_offset;
187 /* If this line had an MRI style label, it is stored in this variable.
188 This is used by some of the MRI pseudo-ops. */
191 /* This global variable is used to support MRI common sections. We
192 translate such sections into a common symbol. This variable is
193 non-NULL when we are in an MRI common section. */
194 symbolS *mri_common_symbol;
196 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
197 need to align to an even byte boundary unless the next pseudo-op is
198 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
200 static int mri_pending_align;
204 /* This variable is set to be non-zero if the next string we see might
205 be the name of the source file in DWARF debugging information. See
206 the comment in emit_expr for the format we look for. */
207 static int dwarf_file_string;
211 static void do_s_func (int end_p, const char *default_prefix);
212 static void do_align (int, char *, int, int);
213 static void s_align (int, int);
214 static void s_altmacro (int);
215 static void s_bad_end (int);
216 static void s_reloc (int);
217 static int hex_float (int, char *);
218 static segT get_known_segmented_expression (expressionS * expP);
219 static void pobegin (void);
220 static int get_line_sb (sb *);
221 static void generate_file_debug (void);
222 static char *_find_end_of_line (char *, int, int);
230 obj_read_begin_hook ();
232 /* Something close -- but not too close -- to a multiple of 1024.
233 The debugging malloc I'm using has 24 bytes of overhead. */
234 obstack_begin (¬es, chunksize);
235 obstack_begin (&cond_obstack, chunksize);
237 /* Use machine dependent syntax. */
238 for (p = line_separator_chars; *p; p++)
239 is_end_of_line[(unsigned char) *p] = 1;
240 /* Use more. FIXME-SOMEDAY. */
246 #ifndef TC_ADDRESS_BYTES
247 #define TC_ADDRESS_BYTES address_bytes
252 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
253 contain an address. */
254 int n = (stdoutput->arch_info->bits_per_address - 1) / 8;
262 /* Set up pseudo-op tables. */
264 static struct hash_control *po_hash;
266 static const pseudo_typeS potable[] = {
267 {"abort", s_abort, 0},
268 {"align", s_align_ptwo, 0},
269 {"altmacro", s_altmacro, 1},
270 {"ascii", stringer, 0},
271 {"asciz", stringer, 1},
272 {"balign", s_align_bytes, 0},
273 {"balignw", s_align_bytes, -2},
274 {"balignl", s_align_bytes, -4},
278 {"common", s_mri_common, 0},
279 {"common.s", s_mri_common, 1},
282 #ifdef TC_ADDRESS_BYTES
286 {"dc.d", float_cons, 'd'},
288 {"dc.s", float_cons, 'f'},
290 {"dc.x", float_cons, 'x'},
292 {"dcb.b", s_space, 1},
293 {"dcb.d", s_float_space, 'd'},
294 {"dcb.l", s_space, 4},
295 {"dcb.s", s_float_space, 'f'},
296 {"dcb.w", s_space, 2},
297 {"dcb.x", s_float_space, 'x'},
299 {"ds.b", s_space, 1},
300 {"ds.d", s_space, 8},
301 {"ds.l", s_space, 4},
302 {"ds.p", s_space, 12},
303 {"ds.s", s_space, 4},
304 {"ds.w", s_space, 2},
305 {"ds.x", s_space, 12},
306 {"debug", s_ignore, 0},
311 {"double", float_cons, 'd'},
313 {"eject", listing_eject, 0}, /* Formfeed listing. */
315 {"elsec", s_else, 0},
316 {"elseif", s_elseif, (int) O_ne},
318 {"endc", s_endif, 0},
319 {"endfunc", s_func, 1},
320 {"endif", s_endif, 0},
321 {"endm", s_bad_end, 0},
322 {"endr", s_bad_end, 1},
328 {"error", s_errwarn, 1},
329 {"exitm", s_mexit, 0},
331 {"extern", s_ignore, 0}, /* We treat all undef as ext. */
332 {"appfile", s_app_file, 1},
333 {"appline", s_app_line, 1},
335 {"file", s_app_file, 0},
337 {"float", float_cons, 'f'},
338 {"format", s_ignore, 0},
340 {"global", s_globl, 0},
341 {"globl", s_globl, 0},
343 {"if", s_if, (int) O_ne},
346 {"ifdef", s_ifdef, 0},
347 {"ifeq", s_if, (int) O_eq},
348 {"ifeqs", s_ifeqs, 0},
349 {"ifge", s_if, (int) O_ge},
350 {"ifgt", s_if, (int) O_gt},
351 {"ifle", s_if, (int) O_le},
352 {"iflt", s_if, (int) O_lt},
355 {"ifndef", s_ifdef, 1},
356 {"ifne", s_if, (int) O_ne},
357 {"ifnes", s_ifeqs, 1},
358 {"ifnotdef", s_ifdef, 1},
359 {"incbin", s_incbin, 0},
360 {"include", s_include, 0},
366 {"lcomm", s_lcomm, 0},
367 {"lflags", listing_flags, 0}, /* Listing flags. */
368 {"linefile", s_app_line, 0},
369 {"linkonce", s_linkonce, 0},
370 {"list", listing_list, 1}, /* Turn listing on. */
371 {"llen", listing_psize, 1},
374 {"macro", s_macro, 0},
375 {"mexit", s_mexit, 0},
377 {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
378 {"name", s_ignore, 0},
379 {"noaltmacro", s_altmacro, 0},
380 {"noformat", s_ignore, 0},
381 {"nolist", listing_list, 0}, /* Turn listing off. */
382 {"nopage", listing_nopage, 0},
384 {"offset", s_struct, 0},
386 {"p2align", s_align_ptwo, 0},
387 {"p2alignw", s_align_ptwo, -2},
388 {"p2alignl", s_align_ptwo, -4},
389 {"page", listing_eject, 0},
390 {"plen", listing_psize, 0},
391 {"print", s_print, 0},
392 {"psize", listing_psize, 0}, /* Set paper size. */
393 {"purgem", s_purgem, 0},
395 {"reloc", s_reloc, 0},
399 {"sbttl", listing_title, 1}, /* Subtitle of listing. */
404 {"single", float_cons, 'f'},
406 {"space", s_space, 0},
407 {"skip", s_space, 0},
408 {"sleb128", s_leb128, 1},
409 {"spc", s_ignore, 0},
410 {"stabd", s_stab, 'd'},
411 {"stabn", s_stab, 'n'},
412 {"stabs", s_stab, 's'},
413 {"string", stringer, 1},
414 {"struct", s_struct, 0},
418 /* This is for gcc to use. It's only just been added (2/94), so gcc
419 won't be able to use it for a while -- probably a year or more.
420 But once this has been released, check with gcc maintainers
421 before deleting it or even changing the spelling. */
422 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
423 /* If we're folding case -- done for some targets, not necessarily
424 all -- the above string in an input file will be converted to
425 this one. Match it either way... */
426 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
428 {"title", listing_title, 0}, /* Listing title. */
429 {"ttl", listing_title, 0},
431 {"uleb128", s_leb128, 0},
435 {"xdef", s_globl, 0},
436 {"xref", s_ignore, 0},
437 {"xstabs", s_xstab, 's'},
438 {"warning", s_errwarn, 0},
439 {"weakref", s_weakref, 0},
441 {"zero", s_space, 0},
442 {NULL, NULL, 0} /* End sentinel. */
446 get_absolute_expr (expressionS *exp)
448 expression_and_evaluate (exp);
449 if (exp->X_op != O_constant)
451 if (exp->X_op != O_absent)
452 as_bad (_("bad or irreducible absolute expression"));
453 exp->X_add_number = 0;
455 return exp->X_add_number;
459 get_absolute_expression (void)
463 return get_absolute_expr (&exp);
466 static int pop_override_ok = 0;
467 static const char *pop_table_name;
470 pop_insert (const pseudo_typeS *table)
473 const pseudo_typeS *pop;
474 for (pop = table; pop->poc_name; pop++)
476 errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
477 if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
478 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name,
483 #ifndef md_pop_insert
484 #define md_pop_insert() pop_insert(md_pseudo_table)
487 #ifndef obj_pop_insert
488 #define obj_pop_insert() pop_insert(obj_pseudo_table)
491 #ifndef cfi_pop_insert
492 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
498 po_hash = hash_new ();
500 /* Do the target-specific pseudo ops. */
501 pop_table_name = "md";
504 /* Now object specific. Skip any that were in the target table. */
505 pop_table_name = "obj";
509 /* Now portable ones. Skip any that we've seen already. */
510 pop_table_name = "standard";
511 pop_insert (potable);
513 #ifdef TARGET_USE_CFIPOP
514 pop_table_name = "cfi";
520 #define HANDLE_CONDITIONAL_ASSEMBLY() \
521 if (ignore_input ()) \
523 char *eol = find_end_of_line (input_line_pointer, flag_m68k_mri); \
524 input_line_pointer = (input_line_pointer <= buffer_limit \
525 && eol >= buffer_limit) \
531 /* This function is used when scrubbing the characters between #APP
534 static char *scrub_string;
535 static char *scrub_string_end;
538 scrub_from_string (char *buf, int buflen)
542 copy = scrub_string_end - scrub_string;
545 memcpy (buf, scrub_string, copy);
546 scrub_string += copy;
550 /* Helper function of read_a_source_file, which tries to expand a macro. */
552 try_macro (char term, const char *line)
558 if (check_macro (line, &out, &err, ¯o))
562 *input_line_pointer++ = term;
563 input_scrub_include_sb (&out,
564 input_line_pointer, 1);
567 input_scrub_next_buffer (&input_line_pointer);
569 md_macro_info (macro);
576 /* We read the file, putting things into a web that represents what we
577 have been reading. */
579 read_a_source_file (char *name)
582 register char *s; /* String of symbol, '\0' appended. */
590 buffer = input_scrub_new_file (name);
593 listing_newline (NULL);
594 register_dependency (name);
596 /* Generate debugging information before we've read anything in to denote
597 this file as the "main" source file and not a subordinate one
598 (e.g. N_SO vs N_SOL in stabs). */
599 generate_file_debug ();
601 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
602 { /* We have another line to parse. */
604 /* In order to avoid listing macro expansion lines with labels
605 multiple times, keep track of which line was last issued. */
606 static char *last_eol;
610 while (input_line_pointer < buffer_limit)
612 /* We have more of this buffer to parse. */
614 /* We now have input_line_pointer->1st char of next line.
615 If input_line_pointer [-1] == '\n' then we just
616 scanned another line: so bump line counters. */
617 if (is_end_of_line[(unsigned char) input_line_pointer[-1]])
619 #ifdef md_start_line_hook
620 md_start_line_hook ();
622 if (input_line_pointer[-1] == '\n')
623 bump_line_counters ();
627 if (LABELS_WITHOUT_COLONS || flag_m68k_mri)
629 /* Text at the start of a line must be a label, we
630 run down and stick a colon in. */
631 if (is_name_beginner (*input_line_pointer))
633 char *line_start = input_line_pointer;
638 HANDLE_CONDITIONAL_ASSEMBLY ();
640 c = get_symbol_end ();
642 /* In MRI mode, the EQU and MACRO pseudoops must
643 be handled specially. */
647 char *rest = input_line_pointer + 1;
651 if (*rest == ' ' || *rest == '\t')
653 if ((strncasecmp (rest, "EQU", 3) == 0
654 || strncasecmp (rest, "SET", 3) == 0)
655 && (rest[3] == ' ' || rest[3] == '\t'))
657 input_line_pointer = rest + 3;
659 strncasecmp (rest, "SET", 3) == 0);
662 if (strncasecmp (rest, "MACRO", 5) == 0
665 || is_end_of_line[(unsigned char) rest[5]]))
669 /* In MRI mode, we need to handle the MACRO
670 pseudo-op specially: we don't want to put the
671 symbol in the symbol table. */
673 #ifdef TC_START_LABEL_WITHOUT_COLON
674 && TC_START_LABEL_WITHOUT_COLON(c,
678 line_label = colon (line_start);
680 line_label = symbol_create (line_start,
685 *input_line_pointer = c;
687 input_line_pointer++;
692 /* We are at the beginning of a line, or similar place.
693 We expect a well-formed assembler statement.
694 A "symbol-name:" is a statement.
696 Depending on what compiler is used, the order of these tests
697 may vary to catch most common case 1st.
698 Each test is independent of all other tests at the (top) level.
699 PLEASE make a compiler that doesn't use this assembler.
700 It is crufty to waste a compiler's time encoding things for this
701 assembler, which then wastes more time decoding it.
702 (And communicating via (linear) files is silly!
703 If you must pass stuff, please pass a tree!) */
704 if ((c = *input_line_pointer++) == '\t'
707 c = *input_line_pointer++;
709 know (c != ' '); /* No further leading whitespace. */
712 /* If listing is on, and we are expanding a macro, then give
713 the listing code the contents of the expanded line. */
716 if ((listing & LISTING_MACEXP) && macro_nest > 0)
721 /* Find the end of the current expanded macro line. */
722 s = find_end_of_line (input_line_pointer - 1, flag_m68k_mri);
727 /* Copy it for safe keeping. Also give an indication of
728 how much macro nesting is involved at this point. */
729 len = s - (input_line_pointer - 1);
730 copy = (char *) xmalloc (len + macro_nest + 2);
731 memset (copy, '>', macro_nest);
732 copy[macro_nest] = ' ';
733 memcpy (copy + macro_nest + 1, input_line_pointer - 1, len);
734 copy[macro_nest + 1 + len] = '\0';
736 /* Install the line with the listing facility. */
737 listing_newline (copy);
741 listing_newline (NULL);
744 /* C is the 1st significant character.
745 Input_line_pointer points after that character. */
746 if (is_name_beginner (c))
748 /* Want user-defined label or pseudo/opcode. */
749 HANDLE_CONDITIONAL_ASSEMBLY ();
751 s = --input_line_pointer;
752 c = get_symbol_end (); /* name's delimiter. */
754 /* C is character after symbol.
755 That character's place in the input line is now '\0'.
756 S points to the beginning of the symbol.
757 [In case of pseudo-op, s->'.'.]
758 Input_line_pointer->'\0' where c was. */
759 if (TC_START_LABEL (c, input_line_pointer))
763 char *rest = input_line_pointer + 1;
765 /* In MRI mode, \tsym: set 0 is permitted. */
769 if (*rest == ' ' || *rest == '\t')
772 if ((strncasecmp (rest, "EQU", 3) == 0
773 || strncasecmp (rest, "SET", 3) == 0)
774 && (rest[3] == ' ' || rest[3] == '\t'))
776 input_line_pointer = rest + 3;
782 line_label = colon (s); /* User-defined label. */
783 /* Put ':' back for error messages' sake. */
784 *input_line_pointer++ = ':';
785 #ifdef tc_check_label
786 tc_check_label (line_label);
788 /* Input_line_pointer->after ':'. */
791 else if (input_line_pointer[1] == '='
793 || ((c == ' ' || c == '\t')
794 && input_line_pointer[2] == '=')))
797 demand_empty_rest_of_line ();
800 || ((c == ' ' || c == '\t')
801 && input_line_pointer[1] == '='))
802 #ifdef TC_EQUAL_IN_INSN
803 && !TC_EQUAL_IN_INSN (c, s)
808 demand_empty_rest_of_line ();
812 /* Expect pseudo-op or machine instruction. */
815 #ifndef TC_CASE_SENSITIVE
819 strncpy (original_case_string, s2, sizeof (original_case_string));
820 original_case_string[sizeof (original_case_string) - 1] = 0;
829 if (NO_PSEUDO_DOT || flag_m68k_mri)
831 /* The MRI assembler uses pseudo-ops without
833 pop = (pseudo_typeS *) hash_find (po_hash, s);
834 if (pop != NULL && pop->poc_handler == NULL)
839 || (!flag_m68k_mri && *s == '.'))
843 WARNING: c has next char, which may be end-of-line.
844 We lookup the pseudo-op table with s+1 because we
845 already know that the pseudo-op begins with a '.'. */
848 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
849 if (pop && !pop->poc_handler)
852 /* In MRI mode, we may need to insert an
853 automatic alignment directive. What a hack
855 if (mri_pending_align
857 || !((pop->poc_handler == cons
858 && pop->poc_val == 1)
859 || (pop->poc_handler == s_space
860 && pop->poc_val == 1)
861 #ifdef tc_conditional_pseudoop
862 || tc_conditional_pseudoop (pop)
864 || pop->poc_handler == s_if
865 || pop->poc_handler == s_ifdef
866 || pop->poc_handler == s_ifc
867 || pop->poc_handler == s_ifeqs
868 || pop->poc_handler == s_else
869 || pop->poc_handler == s_endif
870 || pop->poc_handler == s_globl
871 || pop->poc_handler == s_ignore)))
873 do_align (1, (char *) NULL, 0, 0);
874 mri_pending_align = 0;
876 if (line_label != NULL)
878 symbol_set_frag (line_label, frag_now);
879 S_SET_VALUE (line_label, frag_now_fix ());
883 /* Print the error msg now, while we still can. */
886 char *end = input_line_pointer;
888 *input_line_pointer = c;
890 c = *--input_line_pointer;
891 *input_line_pointer = '\0';
892 if (! macro_defined || ! try_macro (c, s))
895 as_bad (_("unknown pseudo-op: `%s'"), s);
896 *input_line_pointer++ = c;
901 /* Put it back for error messages etc. */
902 *input_line_pointer = c;
903 /* The following skip of whitespace is compulsory.
904 A well shaped space is sometimes all that separates
905 keyword from operands. */
906 if (c == ' ' || c == '\t')
907 input_line_pointer++;
909 /* Input_line is restored.
910 Input_line_pointer->1st non-blank char
911 after pseudo-operation. */
912 (*pop->poc_handler) (pop->poc_val);
914 /* If that was .end, just get out now. */
915 if (pop->poc_handler == s_end)
920 /* WARNING: c has char, which may be end-of-line. */
921 /* Also: input_line_pointer->`\0` where c was. */
922 *input_line_pointer = c;
923 input_line_pointer = _find_end_of_line (input_line_pointer, flag_m68k_mri, 1);
924 c = *input_line_pointer;
925 *input_line_pointer = '\0';
927 generate_lineno_debug ();
929 if (macro_defined && try_macro (c, s))
932 if (mri_pending_align)
934 do_align (1, (char *) NULL, 0, 0);
935 mri_pending_align = 0;
936 if (line_label != NULL)
938 symbol_set_frag (line_label, frag_now);
939 S_SET_VALUE (line_label, frag_now_fix ());
943 md_assemble (s); /* Assemble 1 instruction. */
945 *input_line_pointer++ = c;
947 /* We resume loop AFTER the end-of-line from
954 /* Empty statement? */
955 if (is_end_of_line[(unsigned char) c])
958 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) && ISDIGIT (c))
960 /* local label ("4:") */
961 char *backup = input_line_pointer;
963 HANDLE_CONDITIONAL_ASSEMBLY ();
967 /* Read the whole number. */
968 while (ISDIGIT (*input_line_pointer))
970 temp = (temp * 10) + *input_line_pointer - '0';
971 ++input_line_pointer;
974 if (LOCAL_LABELS_DOLLAR
975 && *input_line_pointer == '$'
976 && *(input_line_pointer + 1) == ':')
978 input_line_pointer += 2;
980 if (dollar_label_defined (temp))
982 as_fatal (_("label \"%d$\" redefined"), temp);
985 define_dollar_label (temp);
986 colon (dollar_label_name (temp, 0));
991 && *input_line_pointer++ == ':')
993 fb_label_instance_inc (temp);
994 colon (fb_label_name (temp, 0));
998 input_line_pointer = backup;
999 } /* local label ("4:") */
1001 if (c && strchr (line_comment_chars, c))
1002 { /* Its a comment. Better say APP or NO_APP. */
1007 unsigned int new_length;
1010 s = input_line_pointer;
1011 if (strncmp (s, "APP\n", 4))
1014 ignore_rest_of_line ();
1017 bump_line_counters ();
1021 ends = strstr (s, "#NO_APP\n");
1025 unsigned int tmp_len;
1028 /* The end of the #APP wasn't in this buffer. We
1029 keep reading in buffers until we find the #NO_APP
1030 that goes with this #APP There is one. The specs
1032 tmp_len = buffer_limit - s;
1033 tmp_buf = xmalloc (tmp_len + 1);
1034 memcpy (tmp_buf, s, tmp_len);
1037 new_tmp = input_scrub_next_buffer (&buffer);
1041 buffer_limit = new_tmp;
1042 input_line_pointer = buffer;
1043 ends = strstr (buffer, "#NO_APP\n");
1045 num = ends - buffer;
1047 num = buffer_limit - buffer;
1049 tmp_buf = xrealloc (tmp_buf, tmp_len + num);
1050 memcpy (tmp_buf + tmp_len, buffer, num);
1055 input_line_pointer = ends ? ends + 8 : NULL;
1063 input_line_pointer = ends + 8;
1067 scrub_string_end = ends;
1069 new_length = ends - s;
1070 new_buf = (char *) xmalloc (new_length);
1077 space = (new_buf + new_length) - new_tmp;
1078 size = do_scrub_chars (scrub_from_string, new_tmp, space);
1086 new_buf = xrealloc (new_buf, new_length + 100);
1087 new_tmp = new_buf + new_length;
1094 /* We've "scrubbed" input to the preferred format. In the
1095 process we may have consumed the whole of the remaining
1096 file (and included files). We handle this formatted
1097 input similar to that of macro expansion, letting
1098 actual macro expansion (possibly nested) and other
1099 input expansion work. Beware that in messages, line
1100 numbers and possibly file names will be incorrect. */
1101 sb_add_string (&sbuf, new_buf);
1102 input_scrub_include_sb (&sbuf, input_line_pointer, 0);
1104 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1109 HANDLE_CONDITIONAL_ASSEMBLY ();
1111 #ifdef tc_unrecognized_line
1112 if (tc_unrecognized_line (c))
1115 input_line_pointer--;
1116 /* Report unknown char as error. */
1117 demand_empty_rest_of_line ();
1120 #ifdef md_after_pass_hook
1121 md_after_pass_hook ();
1130 /* Close the input file. */
1131 input_scrub_close ();
1132 #ifdef WARN_COMMENTS
1134 if (warn_comment && found_comment)
1135 as_warn_where (found_comment_file, found_comment,
1136 "first comment found here");
1141 /* Convert O_constant expression EXP into the equivalent O_big representation.
1142 Take the sign of the number from X_unsigned rather than X_add_number. */
1145 convert_to_bignum (expressionS *exp)
1150 value = exp->X_add_number;
1151 for (i = 0; i < sizeof (exp->X_add_number) / CHARS_PER_LITTLENUM; i++)
1153 generic_bignum[i] = value & LITTLENUM_MASK;
1154 value >>= LITTLENUM_NUMBER_OF_BITS;
1156 /* Add a sequence of sign bits if the top bit of X_add_number is not
1157 the sign of the original value. */
1158 if ((exp->X_add_number < 0) != !exp->X_unsigned)
1159 generic_bignum[i++] = exp->X_unsigned ? 0 : LITTLENUM_MASK;
1161 exp->X_add_number = i;
1164 /* For most MRI pseudo-ops, the line actually ends at the first
1165 nonquoted space. This function looks for that point, stuffs a null
1166 in, and sets *STOPCP to the character that used to be there, and
1167 returns the location.
1169 Until I hear otherwise, I am going to assume that this is only true
1170 for the m68k MRI assembler. */
1173 mri_comment_field (char *stopcp)
1179 know (flag_m68k_mri);
1181 for (s = input_line_pointer;
1182 ((!is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
1190 for (s = input_line_pointer;
1191 !is_end_of_line[(unsigned char) *s];
1201 /* Skip to the end of an MRI comment field. */
1204 mri_comment_end (char *stop, int stopc)
1208 input_line_pointer = stop;
1210 while (!is_end_of_line[(unsigned char) *input_line_pointer])
1211 ++input_line_pointer;
1215 s_abort (int ignore ATTRIBUTE_UNUSED)
1217 as_fatal (_(".abort detected. Abandoning ship."));
1220 /* Guts of .align directive. N is the power of two to which to align.
1221 FILL may be NULL, or it may point to the bytes of the fill pattern.
1222 LEN is the length of whatever FILL points to, if anything. MAX is
1223 the maximum number of characters to skip when doing the alignment,
1224 or 0 if there is no maximum. */
1227 do_align (int n, char *fill, int len, int max)
1229 if (now_seg == absolute_section)
1233 if (*fill++ != '\0')
1235 as_warn (_("ignoring fill value in absolute section"));
1242 #ifdef md_flush_pending_output
1243 md_flush_pending_output ();
1246 md_do_align (n, fill, len, max, just_record_alignment);
1249 /* Only make a frag if we HAVE to... */
1250 if (n != 0 && !need_pass_2)
1254 if (subseg_text_p (now_seg))
1255 frag_align_code (n, max);
1257 frag_align (n, 0, max);
1260 frag_align (n, *fill, max);
1262 frag_align_pattern (n, fill, len, max);
1266 just_record_alignment: ATTRIBUTE_UNUSED_LABEL
1269 record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
1272 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1273 (in bytes). A negative ARG is the negative of the length of the
1274 fill pattern. BYTES_P is non-zero if the alignment value should be
1275 interpreted as the byte boundary, rather than the power of 2. */
1277 #define ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1280 s_align (int arg, int bytes_p)
1282 unsigned int align_limit = ALIGN_LIMIT;
1291 stop = mri_comment_field (&stopc);
1293 if (is_end_of_line[(unsigned char) *input_line_pointer])
1298 align = arg; /* Default value from pseudo-op table. */
1302 align = get_absolute_expression ();
1308 /* Convert to a power of 2. */
1313 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1316 as_bad (_("alignment not a power of 2"));
1322 if (align > align_limit)
1324 align = align_limit;
1325 as_warn (_("alignment too large: %u assumed"), align);
1328 if (*input_line_pointer != ',')
1335 ++input_line_pointer;
1336 if (*input_line_pointer == ',')
1340 fill = get_absolute_expression ();
1345 if (*input_line_pointer != ',')
1349 ++input_line_pointer;
1350 max = get_absolute_expression ();
1357 as_warn (_("expected fill pattern missing"));
1358 do_align (align, (char *) NULL, 0, max);
1373 do_align (align, &fill_char, fill_len, max);
1379 if ((size_t) fill_len > sizeof ab)
1381 md_number_to_chars (ab, fill, fill_len);
1382 do_align (align, ab, fill_len, max);
1386 demand_empty_rest_of_line ();
1389 mri_comment_end (stop, stopc);
1392 /* Handle the .align pseudo-op on machines where ".align 4" means
1393 align to a 4 byte boundary. */
1396 s_align_bytes (int arg)
1401 /* Handle the .align pseudo-op on machines where ".align 4" means align
1402 to a 2**4 boundary. */
1405 s_align_ptwo (int arg)
1410 /* Switch in and out of alternate macro mode. */
1415 demand_empty_rest_of_line ();
1416 macro_set_alternate (on);
1420 s_comm_internal (int param,
1421 symbolS *(*comm_parse_extra) (int, symbolS *, addressT))
1427 symbolS *symbolP = NULL;
1433 stop = mri_comment_field (&stopc);
1435 name = input_line_pointer;
1436 c = get_symbol_end ();
1437 /* Just after name is now '\0'. */
1438 p = input_line_pointer;
1443 as_bad (_("expected symbol name"));
1444 ignore_rest_of_line ();
1450 /* Accept an optional comma after the name. The comma used to be
1451 required, but Irix 5 cc does not generate it for .lcomm. */
1452 if (*input_line_pointer == ',')
1453 input_line_pointer++;
1455 temp = get_absolute_expr (&exp);
1457 size &= ((offsetT) 2 << (stdoutput->arch_info->bits_per_address - 1)) - 1;
1458 if (exp.X_op == O_absent)
1460 as_bad (_("missing size expression"));
1461 ignore_rest_of_line ();
1464 else if (temp != size || !exp.X_unsigned)
1466 as_warn (_("size (%ld) out of range, ignored"), (long) temp);
1467 ignore_rest_of_line ();
1472 symbolP = symbol_find_or_make (name);
1473 if ((S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
1474 && !S_IS_COMMON (symbolP))
1476 if (!S_IS_VOLATILE (symbolP))
1479 as_bad (_("symbol `%s' is already defined"), name);
1481 ignore_rest_of_line ();
1484 symbolP = symbol_clone (symbolP, 1);
1485 S_SET_SEGMENT (symbolP, undefined_section);
1486 S_SET_VALUE (symbolP, 0);
1487 symbol_set_frag (symbolP, &zero_address_frag);
1488 S_CLEAR_VOLATILE (symbolP);
1491 size = S_GET_VALUE (symbolP);
1494 else if (size != temp)
1495 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1496 name, (long) size, (long) temp);
1499 if (comm_parse_extra != NULL)
1500 symbolP = (*comm_parse_extra) (param, symbolP, size);
1503 S_SET_VALUE (symbolP, (valueT) size);
1504 S_SET_EXTERNAL (symbolP);
1505 S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
1508 extern int flag_one;
1509 if (size == 0 || !flag_one)
1510 S_GET_OTHER (symbolP) = const_flag;
1515 demand_empty_rest_of_line ();
1518 mri_comment_end (stop, stopc);
1525 s_comm_internal (ignore, NULL);
1528 /* The MRI COMMON pseudo-op. We handle this by creating a common
1529 symbol with the appropriate name. We make s_space do the right
1530 thing by increasing the size. */
1533 s_mri_common (int small ATTRIBUTE_UNUSED)
1549 stop = mri_comment_field (&stopc);
1553 name = input_line_pointer;
1554 if (!ISDIGIT (*name))
1555 c = get_symbol_end ();
1560 ++input_line_pointer;
1562 while (ISDIGIT (*input_line_pointer));
1564 c = *input_line_pointer;
1565 *input_line_pointer = '\0';
1567 if (line_label != NULL)
1569 alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
1570 + (input_line_pointer - name)
1572 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1577 sym = symbol_find_or_make (name);
1578 *input_line_pointer = c;
1582 if (*input_line_pointer != ',')
1586 ++input_line_pointer;
1587 align = get_absolute_expression ();
1590 if (S_IS_DEFINED (sym) && !S_IS_COMMON (sym))
1592 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym));
1593 ignore_rest_of_line ();
1594 mri_comment_end (stop, stopc);
1598 S_SET_EXTERNAL (sym);
1599 S_SET_SEGMENT (sym, bfd_com_section_ptr);
1600 mri_common_symbol = sym;
1604 S_SET_ALIGN (sym, align);
1607 if (line_label != NULL)
1610 exp.X_op = O_symbol;
1611 exp.X_add_symbol = sym;
1612 exp.X_add_number = 0;
1613 symbol_set_value_expression (line_label, &exp);
1614 symbol_set_frag (line_label, &zero_address_frag);
1615 S_SET_SEGMENT (line_label, expr_section);
1618 /* FIXME: We just ignore the small argument, which distinguishes
1619 COMMON and COMMON.S. I don't know what we can do about it. */
1621 /* Ignore the type and hptype. */
1622 if (*input_line_pointer == ',')
1623 input_line_pointer += 2;
1624 if (*input_line_pointer == ',')
1625 input_line_pointer += 2;
1627 demand_empty_rest_of_line ();
1629 mri_comment_end (stop, stopc);
1633 s_data (int ignore ATTRIBUTE_UNUSED)
1638 temp = get_absolute_expression ();
1639 if (flag_readonly_data_in_text)
1641 section = text_section;
1645 section = data_section;
1647 subseg_set (section, (subsegT) temp);
1652 demand_empty_rest_of_line ();
1655 /* Handle the .appfile pseudo-op. This is automatically generated by
1656 do_scrub_chars when a preprocessor # line comment is seen with a
1657 file name. This default definition may be overridden by the object
1658 or CPU specific pseudo-ops. This function is also the default
1659 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1663 s_app_file_string (char *file, int appfile ATTRIBUTE_UNUSED)
1667 listing_source_file (file);
1669 register_dependency (file);
1671 obj_app_file (file, appfile);
1676 s_app_file (int appfile)
1681 /* Some assemblers tolerate immediately following '"'. */
1682 if ((s = demand_copy_string (&length)) != 0)
1685 = (!new_logical_line_flags (s, -1, 1) && appfile);
1687 /* In MRI mode, the preprocessor may have inserted an extraneous
1690 && *input_line_pointer == '\''
1691 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1692 ++input_line_pointer;
1694 demand_empty_rest_of_line ();
1696 s_app_file_string (s, appfile);
1701 get_linefile_number (int *flag)
1705 if (*input_line_pointer < '0' || *input_line_pointer > '9')
1708 *flag = get_absolute_expression ();
1713 /* Handle the .appline pseudo-op. This is automatically generated by
1714 do_scrub_chars when a preprocessor # line comment is seen. This
1715 default definition may be overridden by the object or CPU specific
1719 s_app_line (int appline)
1724 /* The given number is that of the next line. */
1726 l = get_absolute_expression ();
1727 else if (!get_linefile_number (&l))
1729 ignore_rest_of_line ();
1736 /* Some of the back ends can't deal with non-positive line numbers.
1737 Besides, it's silly. GCC however will generate a line number of
1738 zero when it is pre-processing builtins for assembler-with-cpp files:
1742 We do not want to barf on this, especially since such files are used
1743 in the GCC and GDB testsuites. So we check for negative line numbers
1744 rather than non-positive line numbers. */
1745 as_warn (_("line numbers must be positive; line number %d rejected"),
1756 if (*input_line_pointer == '"')
1757 file = demand_copy_string (&length);
1763 while (get_linefile_number (&this_flag))
1766 /* From GCC's cpp documentation:
1767 1: start of a new file.
1768 2: returning to a file after having included
1770 3: following text comes from a system header file.
1771 4: following text should be treated as extern "C".
1773 4 is nonsensical for the assembler; 3, we don't
1774 care about, so we ignore it just in case a
1775 system header file is included while
1776 preprocessing assembly. So 1 and 2 are all we
1777 care about, and they are mutually incompatible.
1778 new_logical_line_flags() demands this. */
1781 if (flags && flags != (1 << this_flag))
1782 as_warn (_("incompatible flag %i in line directive"),
1785 flags |= 1 << this_flag;
1790 /* We ignore these. */
1794 as_warn (_("unsupported flag %i in line directive"),
1799 if (!is_end_of_line[(unsigned char)*input_line_pointer])
1804 if (appline || file)
1806 new_logical_line_flags (file, l, flags);
1809 listing_source_line (l);
1813 if (appline || file)
1814 demand_empty_rest_of_line ();
1816 ignore_rest_of_line ();
1819 /* Handle the .end pseudo-op. Actually, the real work is done in
1820 read_a_source_file. */
1823 s_end (int ignore ATTRIBUTE_UNUSED)
1827 /* The MRI assembler permits the start symbol to follow .end,
1828 but we don't support that. */
1830 if (!is_end_of_line[(unsigned char) *input_line_pointer]
1831 && *input_line_pointer != '*'
1832 && *input_line_pointer != '!')
1833 as_warn (_("start address not supported"));
1837 /* Handle the .err pseudo-op. */
1840 s_err (int ignore ATTRIBUTE_UNUSED)
1842 as_bad (_(".err encountered"));
1843 demand_empty_rest_of_line ();
1846 /* Handle the .error and .warning pseudo-ops. */
1852 /* The purpose for the conditional assignment is not to
1853 internationalize the directive itself, but that we need a
1854 self-contained message, one that can be passed like the
1855 demand_copy_C_string return value, and with no assumption on the
1856 location of the name of the directive within the message. */
1858 = (err ? _(".error directive invoked in source file")
1859 : _(".warning directive invoked in source file"));
1861 if (!is_it_end_of_statement ())
1863 if (*input_line_pointer != '\"')
1865 as_bad (_("%s argument must be a string"),
1866 err ? ".error" : ".warning");
1867 ignore_rest_of_line ();
1871 msg = demand_copy_C_string (&len);
1879 as_warn ("%s", msg);
1880 demand_empty_rest_of_line ();
1883 /* Handle the MRI fail pseudo-op. */
1886 s_fail (int ignore ATTRIBUTE_UNUSED)
1893 stop = mri_comment_field (&stopc);
1895 temp = get_absolute_expression ();
1897 as_warn (_(".fail %ld encountered"), (long) temp);
1899 as_bad (_(".fail %ld encountered"), (long) temp);
1901 demand_empty_rest_of_line ();
1904 mri_comment_end (stop, stopc);
1908 s_fill (int ignore ATTRIBUTE_UNUSED)
1910 expressionS rep_exp;
1912 register long fill = 0;
1915 #ifdef md_flush_pending_output
1916 md_flush_pending_output ();
1919 get_known_segmented_expression (&rep_exp);
1920 if (*input_line_pointer == ',')
1922 input_line_pointer++;
1923 size = get_absolute_expression ();
1924 if (*input_line_pointer == ',')
1926 input_line_pointer++;
1927 fill = get_absolute_expression ();
1931 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1932 #define BSD_FILL_SIZE_CROCK_8 (8)
1933 if (size > BSD_FILL_SIZE_CROCK_8)
1935 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8);
1936 size = BSD_FILL_SIZE_CROCK_8;
1940 as_warn (_("size negative; .fill ignored"));
1943 else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
1945 if (rep_exp.X_add_number < 0)
1946 as_warn (_("repeat < 0; .fill ignored"));
1950 if (size && !need_pass_2)
1952 if (rep_exp.X_op == O_constant)
1954 p = frag_var (rs_fill, (int) size, (int) size,
1955 (relax_substateT) 0, (symbolS *) 0,
1956 (offsetT) rep_exp.X_add_number,
1961 /* We don't have a constant repeat count, so we can't use
1962 rs_fill. We can get the same results out of rs_space,
1963 but its argument is in bytes, so we must multiply the
1964 repeat count by size. */
1967 rep_sym = make_expr_symbol (&rep_exp);
1970 expressionS size_exp;
1971 size_exp.X_op = O_constant;
1972 size_exp.X_add_number = size;
1974 rep_exp.X_op = O_multiply;
1975 rep_exp.X_add_symbol = rep_sym;
1976 rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
1977 rep_exp.X_add_number = 0;
1978 rep_sym = make_expr_symbol (&rep_exp);
1981 p = frag_var (rs_space, (int) size, (int) size,
1982 (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
1985 memset (p, 0, (unsigned int) size);
1987 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1988 flavoured AS. The following bizarre behaviour is to be
1989 compatible with above. I guess they tried to take up to 8
1990 bytes from a 4-byte expression and they forgot to sign
1992 #define BSD_FILL_SIZE_CROCK_4 (4)
1993 md_number_to_chars (p, (valueT) fill,
1994 (size > BSD_FILL_SIZE_CROCK_4
1995 ? BSD_FILL_SIZE_CROCK_4
1997 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1998 but emits no error message because it seems a legal thing to do.
1999 It is a degenerate case of .fill but could be emitted by a
2002 demand_empty_rest_of_line ();
2006 s_globl (int ignore ATTRIBUTE_UNUSED)
2015 stop = mri_comment_field (&stopc);
2019 name = input_line_pointer;
2020 c = get_symbol_end ();
2021 symbolP = symbol_find_or_make (name);
2022 S_SET_EXTERNAL (symbolP);
2024 *input_line_pointer = c;
2026 c = *input_line_pointer;
2029 input_line_pointer++;
2031 if (is_end_of_line[(unsigned char) *input_line_pointer])
2037 demand_empty_rest_of_line ();
2040 mri_comment_end (stop, stopc);
2043 /* Handle the MRI IRP and IRPC pseudo-ops. */
2054 as_where (&file, &line);
2057 eol = find_end_of_line (input_line_pointer, 0);
2058 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2059 input_line_pointer = eol;
2063 err = expand_irp (irpc, 0, &s, &out, get_line_sb);
2065 as_bad_where (file, line, "%s", err);
2069 input_scrub_include_sb (&out, input_line_pointer, 1);
2071 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2074 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2075 the section to only be linked once. However, this is not supported
2076 by most object file formats. This takes an optional argument,
2077 which is what to do about duplicates. */
2080 s_linkonce (int ignore ATTRIBUTE_UNUSED)
2082 enum linkonce_type type;
2086 type = LINKONCE_DISCARD;
2088 if (!is_end_of_line[(unsigned char) *input_line_pointer])
2093 s = input_line_pointer;
2094 c = get_symbol_end ();
2095 if (strcasecmp (s, "discard") == 0)
2096 type = LINKONCE_DISCARD;
2097 else if (strcasecmp (s, "one_only") == 0)
2098 type = LINKONCE_ONE_ONLY;
2099 else if (strcasecmp (s, "same_size") == 0)
2100 type = LINKONCE_SAME_SIZE;
2101 else if (strcasecmp (s, "same_contents") == 0)
2102 type = LINKONCE_SAME_CONTENTS;
2104 as_warn (_("unrecognized .linkonce type `%s'"), s);
2106 *input_line_pointer = c;
2109 #ifdef obj_handle_link_once
2110 obj_handle_link_once (type);
2111 #else /* ! defined (obj_handle_link_once) */
2115 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
2116 as_warn (_(".linkonce is not supported for this object file format"));
2118 flags = bfd_get_section_flags (stdoutput, now_seg);
2119 flags |= SEC_LINK_ONCE;
2124 case LINKONCE_DISCARD:
2125 flags |= SEC_LINK_DUPLICATES_DISCARD;
2127 case LINKONCE_ONE_ONLY:
2128 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
2130 case LINKONCE_SAME_SIZE:
2131 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
2133 case LINKONCE_SAME_CONTENTS:
2134 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
2137 if (!bfd_set_section_flags (stdoutput, now_seg, flags))
2138 as_bad (_("bfd_set_section_flags: %s"),
2139 bfd_errmsg (bfd_get_error ()));
2141 #endif /* ! defined (obj_handle_link_once) */
2143 demand_empty_rest_of_line ();
2147 bss_alloc (symbolS *symbolP, addressT size, int align)
2150 segT current_seg = now_seg;
2151 subsegT current_subseg = now_subseg;
2152 segT bss_seg = bss_section;
2154 #if defined (TC_MIPS) || defined (TC_ALPHA)
2155 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
2156 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
2158 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2159 if (size <= bfd_get_gp_size (stdoutput))
2161 bss_seg = subseg_new (".sbss", 1);
2162 seg_info (bss_seg)->bss = 1;
2163 if (!bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
2164 as_warn (_("error setting flags for \".sbss\": %s"),
2165 bfd_errmsg (bfd_get_error ()));
2169 subseg_set (bss_seg, 1);
2173 record_alignment (bss_seg, align);
2174 frag_align (align, 0, 0);
2177 /* Detach from old frag. */
2178 if (S_GET_SEGMENT (symbolP) == bss_seg)
2179 symbol_get_frag (symbolP)->fr_symbol = NULL;
2181 symbol_set_frag (symbolP, frag_now);
2182 pfrag = frag_var (rs_org, 1, 1, 0, symbolP, size, NULL);
2186 S_SET_SIZE (symbolP, size);
2188 S_SET_SEGMENT (symbolP, bss_seg);
2191 /* The symbol may already have been created with a preceding
2192 ".globl" directive -- be careful not to step on storage class
2193 in that case. Otherwise, set it to static. */
2194 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
2195 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2196 #endif /* OBJ_COFF */
2198 subseg_set (current_seg, current_subseg);
2202 parse_align (int align_bytes)
2208 if (*input_line_pointer != ',')
2211 as_bad (_("expected alignment after size"));
2212 ignore_rest_of_line ();
2216 input_line_pointer++;
2219 align = get_absolute_expr (&exp);
2220 if (exp.X_op == O_absent)
2223 if (!exp.X_unsigned)
2225 as_warn (_("alignment negative; 0 assumed"));
2229 if (align_bytes && align != 0)
2231 /* convert to a power of 2 alignment */
2232 unsigned int alignp2 = 0;
2233 while ((align & 1) == 0)
2234 align >>= 1, ++alignp2;
2237 as_bad (_("alignment not a power of 2"));
2238 ignore_rest_of_line ();
2246 /* Called from s_comm_internal after symbol name and size have been
2247 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2248 1 if this was a ".bss" directive which has a 3rd argument
2249 (alignment as a power of 2), or 2 if this was a ".bss" directive
2250 with alignment in bytes. */
2253 s_lcomm_internal (int needs_align, symbolS *symbolP, addressT size)
2259 align = parse_align (needs_align - 1);
2260 if (align == (addressT) -1)
2264 /* Assume some objects may require alignment on some systems. */
2265 TC_IMPLICIT_LCOMM_ALIGNMENT (size, align);
2267 bss_alloc (symbolP, size, align);
2272 s_lcomm (int needs_align)
2274 s_comm_internal (needs_align, s_lcomm_internal);
2278 s_lcomm_bytes (int needs_align)
2280 s_comm_internal (needs_align * 2, s_lcomm_internal);
2284 s_lsym (int ignore ATTRIBUTE_UNUSED)
2286 register char *name;
2290 register symbolS *symbolP;
2292 /* We permit ANY defined expression: BSD4.2 demands constants. */
2293 name = input_line_pointer;
2294 c = get_symbol_end ();
2295 p = input_line_pointer;
2300 as_bad (_("expected symbol name"));
2301 ignore_rest_of_line ();
2307 if (*input_line_pointer != ',')
2310 as_bad (_("expected comma after \"%s\""), name);
2312 ignore_rest_of_line ();
2316 input_line_pointer++;
2317 expression_and_evaluate (&exp);
2319 if (exp.X_op != O_constant
2320 && exp.X_op != O_register)
2322 as_bad (_("bad expression"));
2323 ignore_rest_of_line ();
2328 symbolP = symbol_find_or_make (name);
2330 if (S_GET_SEGMENT (symbolP) == undefined_section)
2332 /* The name might be an undefined .global symbol; be sure to
2333 keep the "external" bit. */
2334 S_SET_SEGMENT (symbolP,
2335 (exp.X_op == O_constant
2338 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2342 as_bad (_("symbol `%s' is already defined"), name);
2346 demand_empty_rest_of_line ();
2349 /* Read a line into an sb. Returns the character that ended the line
2350 or zero if there are no more lines. */
2353 get_line_sb (sb *line)
2357 if (input_line_pointer[-1] == '\n')
2358 bump_line_counters ();
2360 if (input_line_pointer >= buffer_limit)
2362 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2363 if (buffer_limit == 0)
2367 eol = find_end_of_line (input_line_pointer, flag_m68k_mri);
2368 sb_add_buffer (line, input_line_pointer, eol - input_line_pointer);
2369 input_line_pointer = eol;
2371 /* Don't skip multiple end-of-line characters, because that breaks support
2372 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2373 characters but isn't. Instead just skip one end of line character and
2374 return the character skipped so that the caller can re-insert it if
2376 return *input_line_pointer++;
2379 /* Define a macro. This is an interface to macro.c. */
2382 s_macro (int ignore ATTRIBUTE_UNUSED)
2390 as_where (&file, &line);
2393 eol = find_end_of_line (input_line_pointer, 0);
2394 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2395 input_line_pointer = eol;
2397 if (line_label != NULL)
2402 sb_add_string (&label, S_GET_NAME (line_label));
2403 err = define_macro (0, &s, &label, get_line_sb, file, line, &name);
2407 err = define_macro (0, &s, NULL, get_line_sb, file, line, &name);
2409 as_bad_where (file, line, err, name);
2412 if (line_label != NULL)
2414 S_SET_SEGMENT (line_label, absolute_section);
2415 S_SET_VALUE (line_label, 0);
2416 symbol_set_frag (line_label, &zero_address_frag);
2419 if (((NO_PSEUDO_DOT || flag_m68k_mri)
2420 && hash_find (po_hash, name) != NULL)
2423 && hash_find (po_hash, name + 1) != NULL))
2424 as_warn_where (file,
2426 _("attempt to redefine pseudo-op `%s' ignored"),
2433 /* Handle the .mexit pseudo-op, which immediately exits a macro
2437 s_mexit (int ignore ATTRIBUTE_UNUSED)
2439 cond_exit_macro (macro_nest);
2440 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2443 /* Switch in and out of MRI mode. */
2446 s_mri (int ignore ATTRIBUTE_UNUSED)
2450 on = get_absolute_expression ();
2451 old_flag = flag_mri;
2469 /* Operator precedence changes in m68k MRI mode, so we need to
2470 update the operator rankings. */
2471 expr_set_precedence ();
2473 #ifdef MRI_MODE_CHANGE
2475 MRI_MODE_CHANGE (on);
2478 demand_empty_rest_of_line ();
2481 /* Handle changing the location counter. */
2484 do_org (segT segment, expressionS *exp, int fill)
2486 if (segment != now_seg && segment != absolute_section)
2487 as_bad (_("invalid segment \"%s\""), segment_name (segment));
2489 if (now_seg == absolute_section)
2492 as_warn (_("ignoring fill value in absolute section"));
2493 if (exp->X_op != O_constant)
2495 as_bad (_("only constant offsets supported in absolute section"));
2496 exp->X_add_number = 0;
2498 abs_section_offset = exp->X_add_number;
2503 symbolS *sym = exp->X_add_symbol;
2504 offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
2506 if (exp->X_op != O_constant && exp->X_op != O_symbol)
2508 /* Handle complex expressions. */
2509 sym = make_expr_symbol (exp);
2513 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
2519 s_org (int ignore ATTRIBUTE_UNUSED)
2521 register segT segment;
2523 register long temp_fill;
2525 #ifdef md_flush_pending_output
2526 md_flush_pending_output ();
2529 /* The m68k MRI assembler has a different meaning for .org. It
2530 means to create an absolute section at a given address. We can't
2531 support that--use a linker script instead. */
2534 as_bad (_("MRI style ORG pseudo-op not supported"));
2535 ignore_rest_of_line ();
2539 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2540 thing as a sub-segment-relative origin. Any absolute origin is
2541 given a warning, then assumed to be segment-relative. Any
2542 segmented origin expression ("foo+42") had better be in the right
2543 segment or the .org is ignored.
2545 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2546 we never know sub-segment sizes when we are reading code. BSD
2547 will crash trying to emit negative numbers of filler bytes in
2548 certain .orgs. We don't crash, but see as-write for that code.
2550 Don't make frag if need_pass_2==1. */
2551 segment = get_known_segmented_expression (&exp);
2552 if (*input_line_pointer == ',')
2554 input_line_pointer++;
2555 temp_fill = get_absolute_expression ();
2561 do_org (segment, &exp, temp_fill);
2563 demand_empty_rest_of_line ();
2566 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2567 called by the obj-format routine which handles section changing
2568 when in MRI mode. It will create a new section, and return it. It
2569 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2570 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2573 s_mri_sect (char *type ATTRIBUTE_UNUSED)
2583 name = input_line_pointer;
2584 if (!ISDIGIT (*name))
2585 c = get_symbol_end ();
2590 ++input_line_pointer;
2592 while (ISDIGIT (*input_line_pointer));
2594 c = *input_line_pointer;
2595 *input_line_pointer = '\0';
2598 name = xstrdup (name);
2600 *input_line_pointer = c;
2602 seg = subseg_new (name, 0);
2604 if (*input_line_pointer == ',')
2608 ++input_line_pointer;
2609 align = get_absolute_expression ();
2610 record_alignment (seg, align);
2614 if (*input_line_pointer == ',')
2616 c = *++input_line_pointer;
2618 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2621 as_bad (_("unrecognized section type"));
2622 ++input_line_pointer;
2627 flags = SEC_NO_FLAGS;
2629 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2630 else if (*type == 'D' || *type == 'M')
2631 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2632 else if (*type == 'R')
2633 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2634 if (flags != SEC_NO_FLAGS)
2636 if (!bfd_set_section_flags (stdoutput, seg, flags))
2637 as_warn (_("error setting flags for \"%s\": %s"),
2638 bfd_section_name (stdoutput, seg),
2639 bfd_errmsg (bfd_get_error ()));
2644 /* Ignore the HP type. */
2645 if (*input_line_pointer == ',')
2646 input_line_pointer += 2;
2648 demand_empty_rest_of_line ();
2650 #else /* ! TC_M68K */
2659 name = input_line_pointer;
2660 c = get_symbol_end ();
2662 name = xstrdup (name);
2664 *input_line_pointer = c;
2666 seg = subseg_new (name, 0);
2668 if (*input_line_pointer != ',')
2674 ++input_line_pointer;
2676 sectype = input_line_pointer;
2677 c = get_symbol_end ();
2678 if (*sectype == '\0')
2680 else if (strcasecmp (sectype, "text") == 0)
2682 else if (strcasecmp (sectype, "data") == 0)
2684 else if (strcasecmp (sectype, "romdata") == 0)
2687 as_warn (_("unrecognized section type `%s'"), sectype);
2688 *input_line_pointer = c;
2691 if (*input_line_pointer == ',')
2695 ++input_line_pointer;
2697 seccmd = input_line_pointer;
2698 c = get_symbol_end ();
2699 if (strcasecmp (seccmd, "absolute") == 0)
2701 as_bad (_("absolute sections are not supported"));
2702 *input_line_pointer = c;
2703 ignore_rest_of_line ();
2706 else if (strcasecmp (seccmd, "align") == 0)
2710 *input_line_pointer = c;
2711 align = get_absolute_expression ();
2712 record_alignment (seg, align);
2716 as_warn (_("unrecognized section command `%s'"), seccmd);
2717 *input_line_pointer = c;
2721 demand_empty_rest_of_line ();
2723 #else /* ! TC_I960 */
2724 /* The MRI assembler seems to use different forms of .sect for
2725 different targets. */
2726 as_bad ("MRI mode not supported for this target");
2727 ignore_rest_of_line ();
2728 #endif /* ! TC_I960 */
2729 #endif /* ! TC_M68K */
2732 /* Handle the .print pseudo-op. */
2735 s_print (int ignore ATTRIBUTE_UNUSED)
2740 s = demand_copy_C_string (&len);
2743 demand_empty_rest_of_line ();
2746 /* Handle the .purgem pseudo-op. */
2749 s_purgem (int ignore ATTRIBUTE_UNUSED)
2751 if (is_it_end_of_statement ())
2753 demand_empty_rest_of_line ();
2763 name = input_line_pointer;
2764 c = get_symbol_end ();
2765 delete_macro (name);
2766 *input_line_pointer = c;
2769 while (*input_line_pointer++ == ',');
2771 --input_line_pointer;
2772 demand_empty_rest_of_line ();
2775 /* Handle the .endm/.endr pseudo-ops. */
2778 s_bad_end (int endr)
2780 as_warn (_(".end%c encountered without preceeding %s"),
2782 endr ? ".rept, .irp, or .irpc" : ".macro");
2783 demand_empty_rest_of_line ();
2786 /* Handle the .rept pseudo-op. */
2789 s_rept (int ignore ATTRIBUTE_UNUSED)
2793 count = get_absolute_expression ();
2795 do_repeat (count, "REPT", "ENDR");
2798 /* This function provides a generic repeat block implementation. It allows
2799 different directives to be used as the start/end keys. */
2802 do_repeat (int count, const char *start, const char *end)
2808 if (!buffer_and_nest (start, end, &one, get_line_sb))
2810 as_bad (_("%s without %s"), start, end);
2816 sb_add_sb (&many, &one);
2820 input_scrub_include_sb (&many, input_line_pointer, 1);
2822 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2825 /* Skip to end of current repeat loop; EXTRA indicates how many additional
2826 input buffers to skip. Assumes that conditionals preceding the loop end
2827 are properly nested.
2829 This function makes it easier to implement a premature "break" out of the
2830 loop. The EXTRA arg accounts for other buffers we might have inserted,
2831 such as line substitutions. */
2834 end_repeat (int extra)
2836 cond_exit_macro (macro_nest);
2837 while (extra-- >= 0)
2838 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2842 assign_symbol (char *name, int mode)
2846 if (name[0] == '.' && name[1] == '\0')
2848 /* Turn '. = mumble' into a .org mumble. */
2852 segment = get_known_segmented_expression (&exp);
2855 do_org (segment, &exp, 0);
2860 if ((symbolP = symbol_find (name)) == NULL
2861 && (symbolP = md_undefined_symbol (name)) == NULL)
2863 symbolP = symbol_find_or_make (name);
2865 /* When doing symbol listings, play games with dummy fragments living
2866 outside the normal fragment chain to record the file and line info
2868 if (listing & LISTING_SYMBOLS)
2870 extern struct list_info_struct *listing_tail;
2871 fragS *dummy_frag = (fragS *) xcalloc (1, sizeof (fragS));
2872 dummy_frag->line = listing_tail;
2873 dummy_frag->fr_symbol = symbolP;
2874 symbol_set_frag (symbolP, dummy_frag);
2878 /* "set" symbols are local unless otherwise specified. */
2879 SF_SET_LOCAL (symbolP);
2883 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
2885 /* Permit register names to be redefined. */
2886 if ((mode != 0 || !S_IS_VOLATILE (symbolP))
2887 && S_GET_SEGMENT (symbolP) != reg_section)
2889 as_bad (_("symbol `%s' is already defined"), name);
2890 symbolP = symbol_clone (symbolP, 0);
2892 /* If the symbol is volatile, copy the symbol and replace the
2893 original with the copy, so that previous uses of the symbol will
2894 retain the value of the symbol at the point of use. */
2895 else if (S_IS_VOLATILE (symbolP))
2896 symbolP = symbol_clone (symbolP, 1);
2900 S_SET_VOLATILE (symbolP);
2902 S_SET_FORWARD_REF (symbolP);
2904 pseudo_set (symbolP);
2907 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
2908 then this is .equiv, and it is an error if the symbol is already
2909 defined. If EQUIV is -1, the symbol additionally is a forward
2919 /* Especial apologies for the random logic:
2920 this just grew, and could be parsed much more simply!
2922 name = input_line_pointer;
2923 delim = get_symbol_end ();
2924 end_name = input_line_pointer;
2927 if (name == end_name)
2929 as_bad (_("expected symbol name"));
2930 ignore_rest_of_line ();
2936 if (*input_line_pointer != ',')
2939 as_bad (_("expected comma after \"%s\""), name);
2941 ignore_rest_of_line ();
2945 input_line_pointer++;
2948 assign_symbol (name, equiv);
2951 demand_empty_rest_of_line ();
2964 #ifdef md_flush_pending_output
2965 md_flush_pending_output ();
2969 stop = mri_comment_field (&stopc);
2971 /* In m68k MRI mode, we need to align to a word boundary, unless
2973 if (flag_m68k_mri && mult > 1)
2975 if (now_seg == absolute_section)
2977 abs_section_offset += abs_section_offset & 1;
2978 if (line_label != NULL)
2979 S_SET_VALUE (line_label, abs_section_offset);
2981 else if (mri_common_symbol != NULL)
2985 val = S_GET_VALUE (mri_common_symbol);
2988 S_SET_VALUE (mri_common_symbol, val + 1);
2989 if (line_label != NULL)
2991 expressionS *symexp;
2993 symexp = symbol_get_value_expression (line_label);
2994 know (symexp->X_op == O_symbol);
2995 know (symexp->X_add_symbol == mri_common_symbol);
2996 symexp->X_add_number += 1;
3002 do_align (1, (char *) NULL, 0, 0);
3003 if (line_label != NULL)
3005 symbol_set_frag (line_label, frag_now);
3006 S_SET_VALUE (line_label, frag_now_fix ());
3016 if (*input_line_pointer == ',')
3018 ++input_line_pointer;
3023 val.X_op = O_constant;
3024 val.X_add_number = 0;
3027 if (val.X_op != O_constant
3028 || val.X_add_number < - 0x80
3029 || val.X_add_number > 0xff
3030 || (mult != 0 && mult != 1 && val.X_add_number != 0))
3032 resolve_expression (&exp);
3033 if (exp.X_op != O_constant)
3034 as_bad (_("unsupported variable size or fill value"));
3041 bytes = mult * exp.X_add_number;
3042 for (i = 0; i < exp.X_add_number; i++)
3043 emit_expr (&val, mult);
3048 if (now_seg == absolute_section || mri_common_symbol != NULL)
3049 resolve_expression (&exp);
3051 if (exp.X_op == O_constant)
3055 repeat = exp.X_add_number;
3062 as_warn (_(".space repeat count is zero, ignored"));
3063 else if (repeat < 0)
3064 as_warn (_(".space repeat count is negative, ignored"));
3068 /* If we are in the absolute section, just bump the offset. */
3069 if (now_seg == absolute_section)
3071 abs_section_offset += repeat;
3075 /* If we are secretly in an MRI common section, then
3076 creating space just increases the size of the common
3078 if (mri_common_symbol != NULL)
3080 S_SET_VALUE (mri_common_symbol,
3081 S_GET_VALUE (mri_common_symbol) + repeat);
3086 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
3087 (offsetT) repeat, (char *) 0);
3091 if (now_seg == absolute_section)
3093 as_bad (_("space allocation too complex in absolute section"));
3094 subseg_set (text_section, 0);
3097 if (mri_common_symbol != NULL)
3099 as_bad (_("space allocation too complex in common section"));
3100 mri_common_symbol = NULL;
3104 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
3105 make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
3109 *p = val.X_add_number;
3114 /* In MRI mode, after an odd number of bytes, we must align to an
3115 even word boundary, unless the next instruction is a dc.b, ds.b
3117 if (flag_mri && (bytes & 1) != 0)
3118 mri_pending_align = 1;
3120 demand_empty_rest_of_line ();
3123 mri_comment_end (stop, stopc);
3126 /* This is like s_space, but the value is a floating point number with
3127 the given precision. This is for the MRI dcb.s pseudo-op and
3131 s_float_space (int float_type)
3135 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3140 stop = mri_comment_field (&stopc);
3142 count = get_absolute_expression ();
3145 if (*input_line_pointer != ',')
3147 as_bad (_("missing value"));
3148 ignore_rest_of_line ();
3150 mri_comment_end (stop, stopc);
3154 ++input_line_pointer;
3158 /* Skip any 0{letter} that may be present. Don't even check if the
3159 * letter is legal. */
3160 if (input_line_pointer[0] == '0'
3161 && ISALPHA (input_line_pointer[1]))
3162 input_line_pointer += 2;
3164 /* Accept :xxxx, where the x's are hex digits, for a floating point
3165 with the exact digits specified. */
3166 if (input_line_pointer[0] == ':')
3168 flen = hex_float (float_type, temp);
3171 ignore_rest_of_line ();
3173 mri_comment_end (stop, stopc);
3181 err = md_atof (float_type, temp, &flen);
3182 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
3186 as_bad (_("bad floating literal: %s"), err);
3187 ignore_rest_of_line ();
3189 mri_comment_end (stop, stopc);
3194 while (--count >= 0)
3198 p = frag_more (flen);
3199 memcpy (p, temp, (unsigned int) flen);
3202 demand_empty_rest_of_line ();
3205 mri_comment_end (stop, stopc);
3208 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3211 s_struct (int ignore ATTRIBUTE_UNUSED)
3217 stop = mri_comment_field (&stopc);
3218 abs_section_offset = get_absolute_expression ();
3219 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3220 /* The ELF backend needs to know that we are changing sections, so
3221 that .previous works correctly. */
3223 obj_elf_section_change_hook ();
3225 subseg_set (absolute_section, 0);
3226 demand_empty_rest_of_line ();
3228 mri_comment_end (stop, stopc);
3232 s_text (int ignore ATTRIBUTE_UNUSED)
3236 temp = get_absolute_expression ();
3237 subseg_set (text_section, (subsegT) temp);
3238 demand_empty_rest_of_line ();
3240 const_flag &= ~IN_DEFAULT_SECTION;
3244 /* .weakref x, y sets x as an alias to y that, as long as y is not
3245 referenced directly, will cause y to become a weak symbol. */
3247 s_weakref (int ignore ATTRIBUTE_UNUSED)
3256 name = input_line_pointer;
3257 delim = get_symbol_end ();
3258 end_name = input_line_pointer;
3260 if (name == end_name)
3262 as_bad (_("expected symbol name"));
3264 ignore_rest_of_line ();
3268 symbolP = symbol_find_or_make (name);
3270 if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
3272 if (!S_IS_VOLATILE (symbolP))
3274 as_bad (_("symbol `%s' is already defined"), name);
3276 ignore_rest_of_line ();
3279 symbolP = symbol_clone (symbolP, 1);
3280 S_CLEAR_VOLATILE (symbolP);
3287 if (*input_line_pointer != ',')
3290 as_bad (_("expected comma after \"%s\""), name);
3292 ignore_rest_of_line ();
3296 input_line_pointer++;
3300 name = input_line_pointer;
3301 delim = get_symbol_end ();
3302 end_name = input_line_pointer;
3304 if (name == end_name)
3306 as_bad (_("expected symbol name"));
3307 ignore_rest_of_line ();
3311 if ((symbolP2 = symbol_find_noref (name, 1)) == NULL
3312 && (symbolP2 = md_undefined_symbol (name)) == NULL)
3314 symbolP2 = symbol_find_or_make (name);
3315 S_SET_WEAKREFD (symbolP2);
3319 symbolS *symp = symbolP2;
3321 while (S_IS_WEAKREFR (symp) && symp != symbolP)
3323 expressionS *expP = symbol_get_value_expression (symp);
3325 assert (expP->X_op == O_symbol
3326 && expP->X_add_number == 0);
3327 symp = expP->X_add_symbol;
3329 if (symp == symbolP)
3333 loop = concat (S_GET_NAME (symbolP),
3334 " => ", S_GET_NAME (symbolP2), NULL);
3337 while (symp != symbolP)
3339 char *old_loop = loop;
3340 symp = symbol_get_value_expression (symp)->X_add_symbol;
3341 loop = concat (loop, " => ", S_GET_NAME (symp), NULL);
3345 as_bad (_("%s: would close weakref loop: %s"),
3346 S_GET_NAME (symbolP), loop);
3351 ignore_rest_of_line ();
3355 /* Short-circuiting instead of just checking here might speed
3356 things up a tiny little bit, but loop error messages would
3357 miss intermediate links. */
3358 /* symbolP2 = symp; */
3363 memset (&exp, 0, sizeof (exp));
3364 exp.X_op = O_symbol;
3365 exp.X_add_symbol = symbolP2;
3367 S_SET_SEGMENT (symbolP, undefined_section);
3368 symbol_set_value_expression (symbolP, &exp);
3369 symbol_set_frag (symbolP, &zero_address_frag);
3370 S_SET_WEAKREFR (symbolP);
3372 demand_empty_rest_of_line ();
3376 /* Verify that we are at the end of a line. If not, issue an error and
3380 demand_empty_rest_of_line (void)
3383 if (is_end_of_line[(unsigned char) *input_line_pointer])
3384 input_line_pointer++;
3387 if (ISPRINT (*input_line_pointer))
3388 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3389 *input_line_pointer);
3391 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3392 *input_line_pointer);
3393 ignore_rest_of_line ();
3396 /* Return pointing just after end-of-line. */
3397 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3400 /* Silently advance to the end of line. Use this after already having
3401 issued an error about something bad. */
3404 ignore_rest_of_line (void)
3406 while (input_line_pointer < buffer_limit
3407 && !is_end_of_line[(unsigned char) *input_line_pointer])
3408 input_line_pointer++;
3410 input_line_pointer++;
3412 /* Return pointing just after end-of-line. */
3413 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3416 /* Sets frag for given symbol to zero_address_frag, except when the
3417 symbol frag is already set to a dummy listing frag. */
3420 set_zero_frag (symbolS *symbolP)
3422 if (symbol_get_frag (symbolP)->fr_type != rs_dummy)
3423 symbol_set_frag (symbolP, &zero_address_frag);
3426 /* In: Pointer to a symbol.
3427 Input_line_pointer->expression.
3429 Out: Input_line_pointer->just after any whitespace after expression.
3430 Tried to set symbol to value of expression.
3431 Will change symbols type, value, and frag; */
3434 pseudo_set (symbolS *symbolP)
3439 know (symbolP); /* NULL pointer is logic error. */
3441 if (!S_IS_FORWARD_REF (symbolP))
3442 (void) expression (&exp);
3444 (void) deferred_expression (&exp);
3446 if (exp.X_op == O_illegal)
3447 as_bad (_("illegal expression"));
3448 else if (exp.X_op == O_absent)
3449 as_bad (_("missing expression"));
3450 else if (exp.X_op == O_big)
3452 if (exp.X_add_number > 0)
3453 as_bad (_("bignum invalid"));
3455 as_bad (_("floating point number invalid"));
3457 else if (exp.X_op == O_subtract
3458 && !S_IS_FORWARD_REF (symbolP)
3459 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
3460 && (symbol_get_frag (exp.X_add_symbol)
3461 == symbol_get_frag (exp.X_op_symbol)))
3463 exp.X_op = O_constant;
3464 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
3465 - S_GET_VALUE (exp.X_op_symbol));
3468 if (symbol_section_p (symbolP))
3470 as_bad ("attempt to set value of section symbol");
3479 exp.X_add_number = 0;
3482 S_SET_SEGMENT (symbolP, absolute_section);
3483 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3484 set_zero_frag (symbolP);
3488 S_SET_SEGMENT (symbolP, reg_section);
3489 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3490 set_zero_frag (symbolP);
3491 symbol_get_value_expression (symbolP)->X_op = O_register;
3495 seg = S_GET_SEGMENT (exp.X_add_symbol);
3496 /* For x=undef+const, create an expression symbol.
3497 For x=x+const, just update x except when x is an undefined symbol
3498 For x=defined+const, evaluate x. */
3499 if (symbolP == exp.X_add_symbol
3500 && (seg != undefined_section
3501 || !symbol_constant_p (symbolP)))
3503 *symbol_X_add_number (symbolP) += exp.X_add_number;
3506 else if (!S_IS_FORWARD_REF (symbolP) && seg != undefined_section)
3508 symbolS *s = exp.X_add_symbol;
3510 if (S_IS_COMMON (s))
3511 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3512 S_GET_NAME (symbolP), S_GET_NAME (s));
3514 S_SET_SEGMENT (symbolP, seg);
3515 S_SET_VALUE (symbolP, exp.X_add_number + S_GET_VALUE (s));
3516 symbol_set_frag (symbolP, symbol_get_frag (s));
3517 copy_symbol_attributes (symbolP, s);
3520 S_SET_SEGMENT (symbolP, undefined_section);
3521 symbol_set_value_expression (symbolP, &exp);
3522 set_zero_frag (symbolP);
3526 /* The value is some complex expression. */
3527 S_SET_SEGMENT (symbolP, expr_section);
3528 symbol_set_value_expression (symbolP, &exp);
3529 set_zero_frag (symbolP);
3536 CONStruct more frag of .bytes, or .words etc.
3537 Should need_pass_2 be 1 then emit no frag(s).
3538 This understands EXPRESSIONS.
3542 This has a split personality. We use expression() to read the
3543 value. We can detect if the value won't fit in a byte or word.
3544 But we can't detect if expression() discarded significant digits
3545 in the case of a long. Not worth the crocks required to fix it. */
3547 /* Select a parser for cons expressions. */
3549 /* Some targets need to parse the expression in various fancy ways.
3550 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3551 (for example, the HPPA does this). Otherwise, you can define
3552 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3553 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3554 are defined, which is the normal case, then only simple expressions
3559 parse_mri_cons (expressionS *exp, unsigned int nbytes);
3562 #ifndef TC_PARSE_CONS_EXPRESSION
3563 #ifdef BITFIELD_CONS_EXPRESSIONS
3564 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3566 parse_bitfield_cons (expressionS *exp, unsigned int nbytes);
3568 #ifdef REPEAT_CONS_EXPRESSIONS
3569 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3571 parse_repeat_cons (expressionS *exp, unsigned int nbytes);
3574 /* If we haven't gotten one yet, just call expression. */
3575 #ifndef TC_PARSE_CONS_EXPRESSION
3576 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3581 do_parse_cons_expression (expressionS *exp,
3582 int nbytes ATTRIBUTE_UNUSED)
3584 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3588 /* Worker to do .byte etc statements.
3589 Clobbers input_line_pointer and checks end-of-line. */
3592 cons_worker (register int nbytes, /* 1=.byte, 2=.word, 4=.long. */
3600 #ifdef md_flush_pending_output
3601 md_flush_pending_output ();
3605 stop = mri_comment_field (&stopc);
3607 if (is_it_end_of_statement ())
3609 demand_empty_rest_of_line ();
3611 mri_comment_end (stop, stopc);
3615 #ifdef TC_ADDRESS_BYTES
3617 nbytes = TC_ADDRESS_BYTES ();
3620 #ifdef md_cons_align
3621 md_cons_align (nbytes);
3629 parse_mri_cons (&exp, (unsigned int) nbytes);
3632 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3636 if (exp.X_op == O_symbol)
3637 exp.X_op = O_symbol_rva;
3639 as_fatal (_("rva without symbol"));
3641 emit_expr (&exp, (unsigned int) nbytes);
3644 while (*input_line_pointer++ == ',');
3646 /* In MRI mode, after an odd number of bytes, we must align to an
3647 even word boundary, unless the next instruction is a dc.b, ds.b
3649 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3650 mri_pending_align = 1;
3652 input_line_pointer--; /* Put terminator back into stream. */
3654 demand_empty_rest_of_line ();
3657 mri_comment_end (stop, stopc);
3663 cons_worker (size, 0);
3669 cons_worker (size, 1);
3672 /* .reloc offset, reloc_name, symbol+addend. */
3675 s_reloc (int ignore ATTRIBUTE_UNUSED)
3682 struct reloc_list *reloc;
3684 reloc = xmalloc (sizeof (*reloc));
3687 stop = mri_comment_field (&stopc);
3696 as_bad (_("missing or bad offset expression"));
3699 exp.X_add_symbol = section_symbol (now_seg);
3700 exp.X_op = O_symbol;
3703 if (exp.X_add_number == 0)
3705 reloc->u.a.offset_sym = exp.X_add_symbol;
3710 reloc->u.a.offset_sym = make_expr_symbol (&exp);
3715 if (*input_line_pointer != ',')
3717 as_bad (_("missing reloc type"));
3721 ++input_line_pointer;
3723 r_name = input_line_pointer;
3724 c = get_symbol_end ();
3725 reloc->u.a.howto = bfd_reloc_name_lookup (stdoutput, r_name);
3726 *input_line_pointer = c;
3727 if (reloc->u.a.howto == NULL)
3729 as_bad (_("unrecognized reloc type"));
3733 exp.X_op = O_absent;
3735 if (*input_line_pointer == ',')
3737 ++input_line_pointer;
3738 expression_and_evaluate (&exp);
3745 as_bad (_("bad reloc expression"));
3747 ignore_rest_of_line ();
3750 mri_comment_end (stop, stopc);
3753 reloc->u.a.sym = NULL;
3754 reloc->u.a.addend = 0;
3757 reloc->u.a.sym = NULL;
3758 reloc->u.a.addend = exp.X_add_number;
3761 reloc->u.a.sym = exp.X_add_symbol;
3762 reloc->u.a.addend = exp.X_add_number;
3765 reloc->u.a.sym = make_expr_symbol (&exp);
3766 reloc->u.a.addend = 0;
3770 as_where (&reloc->file, &reloc->line);
3771 reloc->next = reloc_list;
3774 demand_empty_rest_of_line ();
3776 mri_comment_end (stop, stopc);
3779 /* Put the contents of expression EXP into the object file using
3780 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3783 emit_expr (expressionS *exp, unsigned int nbytes)
3787 valueT extra_digit = 0;
3789 /* Don't do anything if we are going to make another pass. */
3793 dot_value = frag_now_fix ();
3797 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3798 appear as a four byte positive constant in the .line section,
3799 followed by a 2 byte 0xffff. Look for that case here. */
3801 static int dwarf_line = -1;
3803 if (strcmp (segment_name (now_seg), ".line") != 0)
3805 else if (dwarf_line >= 0
3807 && exp->X_op == O_constant
3808 && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
3809 listing_source_line ((unsigned int) dwarf_line);
3810 else if (nbytes == 4
3811 && exp->X_op == O_constant
3812 && exp->X_add_number >= 0)
3813 dwarf_line = exp->X_add_number;
3818 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3819 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3820 AT_sibling (0x12) followed by a four byte address of the sibling
3821 followed by a 2 byte AT_name (0x38) followed by the name of the
3822 file. We look for that case here. */
3824 static int dwarf_file = 0;
3826 if (strcmp (segment_name (now_seg), ".debug") != 0)
3828 else if (dwarf_file == 0
3830 && exp->X_op == O_constant
3831 && exp->X_add_number == 0x11)
3833 else if (dwarf_file == 1
3835 && exp->X_op == O_constant
3836 && exp->X_add_number == 0x12)
3838 else if (dwarf_file == 2
3841 else if (dwarf_file == 3
3843 && exp->X_op == O_constant
3844 && exp->X_add_number == 0x38)
3849 /* The variable dwarf_file_string tells stringer that the string
3850 may be the name of the source file. */
3851 if (dwarf_file == 4)
3852 dwarf_file_string = 1;
3854 dwarf_file_string = 0;
3859 if (check_eh_frame (exp, &nbytes))
3864 /* Allow `.word 0' in the absolute section. */
3865 if (now_seg == absolute_section)
3867 if (op != O_constant || exp->X_add_number != 0)
3868 as_bad (_("attempt to store value in absolute section"));
3869 abs_section_offset += nbytes;
3873 /* Handle a negative bignum. */
3875 && exp->X_add_number == 0
3876 && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
3877 && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
3880 unsigned long carry;
3882 exp = symbol_get_value_expression (exp->X_add_symbol);
3884 /* Negate the bignum: one's complement each digit and add 1. */
3886 for (i = 0; i < exp->X_add_number; i++)
3890 next = (((~(generic_bignum[i] & LITTLENUM_MASK))
3893 generic_bignum[i] = next & LITTLENUM_MASK;
3894 carry = next >> LITTLENUM_NUMBER_OF_BITS;
3897 /* We can ignore any carry out, because it will be handled by
3898 extra_digit if it is needed. */
3900 extra_digit = (valueT) -1;
3904 if (op == O_absent || op == O_illegal)
3906 as_warn (_("zero assumed for missing expression"));
3907 exp->X_add_number = 0;
3910 else if (op == O_big && exp->X_add_number <= 0)
3912 as_bad (_("floating point number invalid"));
3913 exp->X_add_number = 0;
3916 else if (op == O_register)
3918 as_warn (_("register value used as expression"));
3922 p = frag_more ((int) nbytes);
3924 #ifndef WORKING_DOT_WORD
3925 /* If we have the difference of two symbols in a word, save it on
3926 the broken_words list. See the code in write.c. */
3927 if (op == O_subtract && nbytes == 2)
3929 struct broken_word *x;
3931 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
3932 x->next_broken_word = broken_words;
3935 x->subseg = now_subseg;
3937 x->word_goes_here = p;
3939 x->add = exp->X_add_symbol;
3940 x->sub = exp->X_op_symbol;
3941 x->addnum = exp->X_add_number;
3949 /* If we have an integer, but the number of bytes is too large to
3950 pass to md_number_to_chars, handle it as a bignum. */
3951 if (op == O_constant && nbytes > sizeof (valueT))
3953 extra_digit = exp->X_unsigned ? 0 : -1;
3954 convert_to_bignum (exp);
3958 if (op == O_constant)
3960 register valueT get;
3961 register valueT use;
3962 register valueT mask;
3964 register valueT unmask;
3966 /* JF << of >= number of bits in the object is undefined. In
3967 particular SPARC (Sun 4) has problems. */
3968 if (nbytes >= sizeof (valueT))
3971 if (nbytes > sizeof (valueT))
3974 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3978 /* Don't store these bits. */
3979 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
3980 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3983 unmask = ~mask; /* Do store these bits. */
3986 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3987 mask = ~(unmask >> 1); /* Includes sign bit now. */
3990 get = exp->X_add_number;
3992 if ((get & mask) != 0
3993 && ((get & mask) != mask
3994 || (get & hibit) == 0))
3995 { /* Leading bits contain both 0s & 1s. */
3996 as_warn (_("value 0x%lx truncated to 0x%lx"),
3997 (unsigned long) get, (unsigned long) use);
3999 /* Put bytes in right order. */
4000 md_number_to_chars (p, use, (int) nbytes);
4002 else if (op == O_big)
4005 LITTLENUM_TYPE *nums;
4007 know (nbytes % CHARS_PER_LITTLENUM == 0);
4009 size = exp->X_add_number * CHARS_PER_LITTLENUM;
4012 as_warn (_("bignum truncated to %d bytes"), nbytes);
4016 if (target_big_endian)
4018 while (nbytes > size)
4020 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
4021 nbytes -= CHARS_PER_LITTLENUM;
4022 p += CHARS_PER_LITTLENUM;
4025 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
4026 while (size >= CHARS_PER_LITTLENUM)
4029 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
4030 size -= CHARS_PER_LITTLENUM;
4031 p += CHARS_PER_LITTLENUM;
4036 nums = generic_bignum;
4037 while (size >= CHARS_PER_LITTLENUM)
4039 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
4041 size -= CHARS_PER_LITTLENUM;
4042 p += CHARS_PER_LITTLENUM;
4043 nbytes -= CHARS_PER_LITTLENUM;
4046 while (nbytes >= CHARS_PER_LITTLENUM)
4048 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
4049 nbytes -= CHARS_PER_LITTLENUM;
4050 p += CHARS_PER_LITTLENUM;
4056 memset (p, 0, nbytes);
4058 /* Now we need to generate a fixS to record the symbol value. */
4060 #ifdef TC_CONS_FIX_NEW
4061 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
4064 bfd_reloc_code_real_type r;
4081 as_bad (_("unsupported BFD relocation size %u"), nbytes);
4085 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp,
4092 #ifdef BITFIELD_CONS_EXPRESSIONS
4094 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
4095 w:x,y:z, where w and y are bitwidths and x and y are values. They
4096 then pack them all together. We do a little better in that we allow
4097 them in words, longs, etc. and we'll pack them in target byte order
4100 The rules are: pack least significant bit first, if a field doesn't
4101 entirely fit, put it in the next unit. Overflowing the bitfield is
4102 explicitly *not* even a warning. The bitwidth should be considered
4105 To use this function the tc-XXX.h file should define
4106 BITFIELD_CONS_EXPRESSIONS. */
4109 parse_bitfield_cons (exp, nbytes)
4111 unsigned int nbytes;
4113 unsigned int bits_available = BITS_PER_CHAR * nbytes;
4114 char *hold = input_line_pointer;
4116 (void) expression (exp);
4118 if (*input_line_pointer == ':')
4125 unsigned long width;
4127 if (*input_line_pointer != ':')
4129 input_line_pointer = hold;
4131 } /* Next piece is not a bitfield. */
4133 /* In the general case, we can't allow
4134 full expressions with symbol
4135 differences and such. The relocation
4136 entries for symbols not defined in this
4137 assembly would require arbitrary field
4138 widths, positions, and masks which most
4139 of our current object formats don't
4142 In the specific case where a symbol
4143 *is* defined in this assembly, we
4144 *could* build fixups and track it, but
4145 this could lead to confusion for the
4146 backends. I'm lazy. I'll take any
4147 SEG_ABSOLUTE. I think that means that
4148 you can use a previous .set or
4149 .equ type symbol. xoxorich. */
4151 if (exp->X_op == O_absent)
4153 as_warn (_("using a bit field width of zero"));
4154 exp->X_add_number = 0;
4155 exp->X_op = O_constant;
4156 } /* Implied zero width bitfield. */
4158 if (exp->X_op != O_constant)
4160 *input_line_pointer = '\0';
4161 as_bad (_("field width \"%s\" too complex for a bitfield"), hold);
4162 *input_line_pointer = ':';
4163 demand_empty_rest_of_line ();
4165 } /* Too complex. */
4167 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
4169 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4170 width, nbytes, (BITS_PER_CHAR * nbytes));
4171 width = BITS_PER_CHAR * nbytes;
4174 if (width > bits_available)
4176 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4177 input_line_pointer = hold;
4178 exp->X_add_number = value;
4183 hold = ++input_line_pointer;
4185 (void) expression (exp);
4186 if (exp->X_op != O_constant)
4188 char cache = *input_line_pointer;
4190 *input_line_pointer = '\0';
4191 as_bad (_("field value \"%s\" too complex for a bitfield"), hold);
4192 *input_line_pointer = cache;
4193 demand_empty_rest_of_line ();
4195 } /* Too complex. */
4197 value |= ((~(-1 << width) & exp->X_add_number)
4198 << ((BITS_PER_CHAR * nbytes) - bits_available));
4200 if ((bits_available -= width) == 0
4201 || is_it_end_of_statement ()
4202 || *input_line_pointer != ',')
4205 } /* All the bitfields we're gonna get. */
4207 hold = ++input_line_pointer;
4208 (void) expression (exp);
4211 exp->X_add_number = value;
4212 exp->X_op = O_constant;
4213 exp->X_unsigned = 1;
4217 #endif /* BITFIELD_CONS_EXPRESSIONS */
4219 /* Handle an MRI style string expression. */
4223 parse_mri_cons (exp, nbytes)
4225 unsigned int nbytes;
4227 if (*input_line_pointer != '\''
4228 && (input_line_pointer[1] != '\''
4229 || (*input_line_pointer != 'A'
4230 && *input_line_pointer != 'E')))
4231 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
4235 unsigned int result = 0;
4237 /* An MRI style string. Cut into as many bytes as will fit into
4238 a nbyte chunk, left justify if necessary, and separate with
4239 commas so we can try again later. */
4240 if (*input_line_pointer == 'A')
4241 ++input_line_pointer;
4242 else if (*input_line_pointer == 'E')
4244 as_bad (_("EBCDIC constants are not supported"));
4245 ++input_line_pointer;
4248 input_line_pointer++;
4249 for (scan = 0; scan < nbytes; scan++)
4251 if (*input_line_pointer == '\'')
4253 if (input_line_pointer[1] == '\'')
4255 input_line_pointer++;
4260 result = (result << 8) | (*input_line_pointer++);
4264 while (scan < nbytes)
4270 /* Create correct expression. */
4271 exp->X_op = O_constant;
4272 exp->X_add_number = result;
4274 /* Fake it so that we can read the next char too. */
4275 if (input_line_pointer[0] != '\'' ||
4276 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
4278 input_line_pointer -= 2;
4279 input_line_pointer[0] = ',';
4280 input_line_pointer[1] = '\'';
4283 input_line_pointer++;
4286 #endif /* TC_M68K */
4288 #ifdef REPEAT_CONS_EXPRESSIONS
4290 /* Parse a repeat expression for cons. This is used by the MIPS
4291 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4292 object file COUNT times.
4294 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4297 parse_repeat_cons (exp, nbytes)
4299 unsigned int nbytes;
4306 if (*input_line_pointer != ':')
4308 /* No repeat count. */
4312 ++input_line_pointer;
4313 expression (&count);
4314 if (count.X_op != O_constant
4315 || count.X_add_number <= 0)
4317 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4321 /* The cons function is going to output this expression once. So we
4322 output it count - 1 times. */
4323 for (i = count.X_add_number - 1; i > 0; i--)
4324 emit_expr (exp, nbytes);
4327 #endif /* REPEAT_CONS_EXPRESSIONS */
4329 /* Parse a floating point number represented as a hex constant. This
4330 permits users to specify the exact bits they want in the floating
4334 hex_float (int float_type, char *bytes)
4366 as_bad (_("unknown floating type type '%c'"), float_type);
4370 /* It would be nice if we could go through expression to parse the
4371 hex constant, but if we get a bignum it's a pain to sort it into
4372 the buffer correctly. */
4374 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
4378 /* The MRI assembler accepts arbitrary underscores strewn about
4379 through the hex constant, so we ignore them as well. */
4380 if (*input_line_pointer == '_')
4382 ++input_line_pointer;
4388 as_warn (_("floating point constant too large"));
4391 d = hex_value (*input_line_pointer) << 4;
4392 ++input_line_pointer;
4393 while (*input_line_pointer == '_')
4394 ++input_line_pointer;
4395 if (hex_p (*input_line_pointer))
4397 d += hex_value (*input_line_pointer);
4398 ++input_line_pointer;
4400 if (target_big_endian)
4403 bytes[length - i - 1] = d;
4409 if (target_big_endian)
4410 memset (bytes + i, 0, length - i);
4412 memset (bytes, 0, length - i);
4420 CONStruct some more frag chars of .floats .ffloats etc.
4421 Makes 0 or more new frags.
4422 If need_pass_2 == 1, no frags are emitted.
4423 This understands only floating literals, not expressions. Sorry.
4425 A floating constant is defined by atof_generic(), except it is preceded
4426 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4427 reading, I decided to be incompatible. This always tries to give you
4428 rounded bits to the precision of the pseudo-op. Former AS did premature
4429 truncation, restored noisy bits instead of trailing 0s AND gave you
4430 a choice of 2 flavours of noise according to which of 2 floating-point
4431 scanners you directed AS to use.
4433 In: input_line_pointer->whitespace before, or '0' of flonum. */
4436 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4437 register int float_type /* 'f':.ffloat ... 'F':.float ... */)
4440 int length; /* Number of chars in an object. */
4441 register char *err; /* Error from scanning floating literal. */
4442 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
4444 if (is_it_end_of_statement ())
4446 demand_empty_rest_of_line ();
4450 #ifdef md_flush_pending_output
4451 md_flush_pending_output ();
4456 /* input_line_pointer->1st char of a flonum (we hope!). */
4459 /* Skip any 0{letter} that may be present. Don't even check if the
4460 letter is legal. Someone may invent a "z" format and this routine
4461 has no use for such information. Lusers beware: you get
4462 diagnostics if your input is ill-conditioned. */
4463 if (input_line_pointer[0] == '0'
4464 && ISALPHA (input_line_pointer[1]))
4465 input_line_pointer += 2;
4467 /* Accept :xxxx, where the x's are hex digits, for a floating
4468 point with the exact digits specified. */
4469 if (input_line_pointer[0] == ':')
4471 ++input_line_pointer;
4472 length = hex_float (float_type, temp);
4475 ignore_rest_of_line ();
4481 err = md_atof (float_type, temp, &length);
4482 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
4486 as_bad (_("bad floating literal: %s"), err);
4487 ignore_rest_of_line ();
4498 #ifdef REPEAT_CONS_EXPRESSIONS
4499 if (*input_line_pointer == ':')
4501 expressionS count_exp;
4503 ++input_line_pointer;
4504 expression (&count_exp);
4506 if (count_exp.X_op != O_constant
4507 || count_exp.X_add_number <= 0)
4508 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4510 count = count_exp.X_add_number;
4514 while (--count >= 0)
4516 p = frag_more (length);
4517 memcpy (p, temp, (unsigned int) length);
4522 while (*input_line_pointer++ == ',');
4524 /* Put terminator back into stream. */
4525 --input_line_pointer;
4526 demand_empty_rest_of_line ();
4529 /* Return the size of a LEB128 value. */
4532 sizeof_sleb128 (offsetT value)
4534 register int size = 0;
4535 register unsigned byte;
4539 byte = (value & 0x7f);
4540 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4541 Fortunately, we can structure things so that the extra work reduces
4542 to a noop on systems that do things "properly". */
4543 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4546 while (!(((value == 0) && ((byte & 0x40) == 0))
4547 || ((value == -1) && ((byte & 0x40) != 0))));
4553 sizeof_uleb128 (valueT value)
4555 register int size = 0;
4556 register unsigned byte;
4560 byte = (value & 0x7f);
4570 sizeof_leb128 (valueT value, int sign)
4573 return sizeof_sleb128 ((offsetT) value);
4575 return sizeof_uleb128 (value);
4578 /* Output a LEB128 value. */
4581 output_sleb128 (char *p, offsetT value)
4583 register char *orig = p;
4588 unsigned byte = (value & 0x7f);
4590 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4591 Fortunately, we can structure things so that the extra work reduces
4592 to a noop on systems that do things "properly". */
4593 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4595 more = !((((value == 0) && ((byte & 0x40) == 0))
4596 || ((value == -1) && ((byte & 0x40) != 0))));
4608 output_uleb128 (char *p, valueT value)
4614 unsigned byte = (value & 0x7f);
4617 /* More bytes to follow. */
4628 output_leb128 (char *p, valueT value, int sign)
4631 return output_sleb128 (p, (offsetT) value);
4633 return output_uleb128 (p, value);
4636 /* Do the same for bignums. We combine sizeof with output here in that
4637 we don't output for NULL values of P. It isn't really as critical as
4638 for "normal" values that this be streamlined. */
4641 output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
4648 /* Strip leading sign extensions off the bignum. */
4650 && bignum[size - 1] == LITTLENUM_MASK
4651 && bignum[size - 2] > LITTLENUM_MASK / 2)
4656 /* OR in the next part of the littlenum. */
4657 val |= (*bignum << loaded);
4658 loaded += LITTLENUM_NUMBER_OF_BITS;
4662 /* Add bytes until there are less than 7 bits left in VAL
4663 or until every non-sign bit has been written. */
4670 || val != ((byte & 0x40) == 0 ? 0 : ((valueT) 1 << loaded) - 1))
4677 while ((byte & 0x80) != 0 && loaded >= 7);
4681 /* Mop up any left-over bits (of which there will be less than 7). */
4682 if ((byte & 0x80) != 0)
4684 /* Sign-extend VAL. */
4685 if (val & (1 << (loaded - 1)))
4686 val |= ~0 << loaded;
4696 output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
4703 /* Strip leading zeros off the bignum. */
4704 /* XXX: Is this needed? */
4705 while (size > 0 && bignum[size - 1] == 0)
4710 if (loaded < 7 && size > 0)
4712 val |= (*bignum << loaded);
4713 loaded += 8 * CHARS_PER_LITTLENUM;
4722 if (size > 0 || val)
4729 while (byte & 0x80);
4735 output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, int size, int sign)
4738 return output_big_sleb128 (p, bignum, size);
4740 return output_big_uleb128 (p, bignum, size);
4743 /* Generate the appropriate fragments for a given expression to emit a
4747 emit_leb128_expr (expressionS *exp, int sign)
4749 operatorT op = exp->X_op;
4750 unsigned int nbytes;
4752 if (op == O_absent || op == O_illegal)
4754 as_warn (_("zero assumed for missing expression"));
4755 exp->X_add_number = 0;
4758 else if (op == O_big && exp->X_add_number <= 0)
4760 as_bad (_("floating point number invalid"));
4761 exp->X_add_number = 0;
4764 else if (op == O_register)
4766 as_warn (_("register value used as expression"));
4769 else if (op == O_constant
4771 && (exp->X_add_number < 0) != !exp->X_unsigned)
4773 /* We're outputting a signed leb128 and the sign of X_add_number
4774 doesn't reflect the sign of the original value. Convert EXP
4775 to a correctly-extended bignum instead. */
4776 convert_to_bignum (exp);
4780 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
4781 a signal that this is leb128 data. It shouldn't optimize this away. */
4782 nbytes = (unsigned int) -1;
4783 if (check_eh_frame (exp, &nbytes))
4786 /* Let the backend know that subsequent data may be byte aligned. */
4787 #ifdef md_cons_align
4791 if (op == O_constant)
4793 /* If we've got a constant, emit the thing directly right now. */
4795 valueT value = exp->X_add_number;
4799 size = sizeof_leb128 (value, sign);
4800 p = frag_more (size);
4801 output_leb128 (p, value, sign);
4803 else if (op == O_big)
4805 /* O_big is a different sort of constant. */
4810 size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
4811 p = frag_more (size);
4812 output_big_leb128 (p, generic_bignum, exp->X_add_number, sign);
4816 /* Otherwise, we have to create a variable sized fragment and
4817 resolve things later. */
4819 frag_var (rs_leb128, sizeof_uleb128 (~(valueT) 0), 0, sign,
4820 make_expr_symbol (exp), 0, (char *) NULL);
4824 /* Parse the .sleb128 and .uleb128 pseudos. */
4831 #ifdef md_flush_pending_output
4832 md_flush_pending_output ();
4838 emit_leb128_expr (&exp, sign);
4840 while (*input_line_pointer++ == ',');
4842 input_line_pointer--;
4843 demand_empty_rest_of_line ();
4846 /* We read 0 or more ',' separated, double-quoted strings.
4847 Caller should have checked need_pass_2 is FALSE because we don't
4851 stringer (/* Worker to do .ascii etc statements. */
4852 /* Checks end-of-line. */
4853 register int append_zero /* 0: don't append '\0', else 1. */)
4855 register unsigned int c;
4858 #ifdef md_flush_pending_output
4859 md_flush_pending_output ();
4862 /* The following awkward logic is to parse ZERO or more strings,
4863 comma separated. Recall a string expression includes spaces
4864 before the opening '\"' and spaces after the closing '\"'.
4865 We fake a leading ',' if there is (supposed to be)
4866 a 1st, expression. We keep demanding expressions for each ','. */
4867 if (is_it_end_of_statement ())
4869 c = 0; /* Skip loop. */
4870 ++input_line_pointer; /* Compensate for end of loop. */
4874 c = ','; /* Do loop. */
4876 /* If we have been switched into the abs_section then we
4877 will not have an obstack onto which we can hang strings. */
4878 if (now_seg == absolute_section)
4880 as_bad (_("strings must be placed into a section"));
4882 ignore_rest_of_line ();
4885 while (c == ',' || c == '<' || c == '"')
4888 switch (*input_line_pointer)
4891 ++input_line_pointer; /*->1st char of string. */
4892 start = input_line_pointer;
4893 while (is_a_char (c = next_char_of_string ()))
4895 FRAG_APPEND_1_CHAR (c);
4899 FRAG_APPEND_1_CHAR (0);
4901 know (input_line_pointer[-1] == '\"');
4905 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
4906 will emit .string with a filename in the .debug section
4907 after a sequence of constants. See the comment in
4908 emit_expr for the sequence. emit_expr will set
4909 dwarf_file_string to non-zero if this string might be a
4910 source file name. */
4911 if (strcmp (segment_name (now_seg), ".debug") != 0)
4912 dwarf_file_string = 0;
4913 else if (dwarf_file_string)
4915 c = input_line_pointer[-1];
4916 input_line_pointer[-1] = '\0';
4917 listing_source_file (start);
4918 input_line_pointer[-1] = c;
4925 input_line_pointer++;
4926 c = get_single_number ();
4927 FRAG_APPEND_1_CHAR (c);
4928 if (*input_line_pointer != '>')
4930 as_bad (_("expected <nn>"));
4932 input_line_pointer++;
4935 input_line_pointer++;
4939 c = *input_line_pointer;
4942 demand_empty_rest_of_line ();
4945 /* FIXME-SOMEDAY: I had trouble here on characters with the
4946 high bits set. We'll probably also have trouble with
4947 multibyte chars, wide chars, etc. Also be careful about
4948 returning values bigger than 1 byte. xoxorich. */
4951 next_char_of_string (void)
4953 register unsigned int c;
4955 c = *input_line_pointer++ & CHAR_MASK;
4963 as_warn (_("unterminated string; newline inserted"));
4964 bump_line_counters ();
4967 #ifndef NO_STRING_ESCAPES
4969 switch (c = *input_line_pointer++)
4997 break; /* As itself. */
5013 for (i = 0, number = 0;
5014 ISDIGIT (c) && i < 3;
5015 c = *input_line_pointer++, i++)
5017 number = number * 8 + c - '0';
5022 --input_line_pointer;
5031 c = *input_line_pointer++;
5032 while (ISXDIGIT (c))
5035 number = number * 16 + c - '0';
5036 else if (ISUPPER (c))
5037 number = number * 16 + c - 'A' + 10;
5039 number = number * 16 + c - 'a' + 10;
5040 c = *input_line_pointer++;
5043 --input_line_pointer;
5048 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
5049 as_warn (_("unterminated string; newline inserted"));
5051 bump_line_counters ();
5056 #ifdef ONLY_STANDARD_ESCAPES
5057 as_bad (_("bad escaped character in string"));
5059 #endif /* ONLY_STANDARD_ESCAPES */
5064 #endif /* ! defined (NO_STRING_ESCAPES) */
5073 get_segmented_expression (register expressionS *expP)
5075 register segT retval;
5077 retval = expression (expP);
5078 if (expP->X_op == O_illegal
5079 || expP->X_op == O_absent
5080 || expP->X_op == O_big)
5082 as_bad (_("expected address expression"));
5083 expP->X_op = O_constant;
5084 expP->X_add_number = 0;
5085 retval = absolute_section;
5091 get_known_segmented_expression (register expressionS *expP)
5093 register segT retval;
5095 if ((retval = get_segmented_expression (expP)) == undefined_section)
5097 /* There is no easy way to extract the undefined symbol from the
5099 if (expP->X_add_symbol != NULL
5100 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
5101 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5102 S_GET_NAME (expP->X_add_symbol));
5104 as_warn (_("some symbol undefined; zero assumed"));
5105 retval = absolute_section;
5106 expP->X_op = O_constant;
5107 expP->X_add_number = 0;
5109 know (retval == absolute_section || SEG_NORMAL (retval));
5113 char /* Return terminator. */
5114 get_absolute_expression_and_terminator (long *val_pointer /* Return value of expression. */)
5116 /* FIXME: val_pointer should probably be offsetT *. */
5117 *val_pointer = (long) get_absolute_expression ();
5118 return (*input_line_pointer++);
5121 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
5122 Give a warning if that happens. */
5125 demand_copy_C_string (int *len_pointer)
5129 if ((s = demand_copy_string (len_pointer)) != 0)
5133 for (len = *len_pointer; len > 0; len--)
5140 as_bad (_("this string may not contain \'\\0\'"));
5148 /* Demand string, but return a safe (=private) copy of the string.
5149 Return NULL if we can't read a string here. */
5152 demand_copy_string (int *lenP)
5154 register unsigned int c;
5160 if (*input_line_pointer == '\"')
5162 input_line_pointer++; /* Skip opening quote. */
5164 while (is_a_char (c = next_char_of_string ()))
5166 obstack_1grow (¬es, c);
5169 /* JF this next line is so demand_copy_C_string will return a
5170 null terminated string. */
5171 obstack_1grow (¬es, '\0');
5172 retval = obstack_finish (¬es);
5176 as_bad (_("missing string"));
5178 ignore_rest_of_line ();
5184 /* In: Input_line_pointer->next character.
5186 Do: Skip input_line_pointer over all whitespace.
5188 Out: 1 if input_line_pointer->end-of-line. */
5191 is_it_end_of_statement (void)
5194 return (is_end_of_line[(unsigned char) *input_line_pointer]);
5198 equals (char *sym_name, int reassign)
5203 input_line_pointer++;
5204 if (*input_line_pointer == '=')
5205 input_line_pointer++;
5206 if (reassign < 0 && *input_line_pointer == '=')
5207 input_line_pointer++;
5209 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
5210 input_line_pointer++;
5213 stop = mri_comment_field (&stopc);
5215 assign_symbol (sym_name, reassign >= 0 ? !reassign : reassign);
5219 demand_empty_rest_of_line ();
5220 mri_comment_end (stop, stopc);
5224 /* .incbin -- include a file verbatim at the current location. */
5227 s_incbin (int x ATTRIBUTE_UNUSED)
5238 #ifdef md_flush_pending_output
5239 md_flush_pending_output ();
5243 filename = demand_copy_string (& len);
5244 if (filename == NULL)
5249 /* Look for optional skip and count. */
5250 if (* input_line_pointer == ',')
5252 ++ input_line_pointer;
5253 skip = get_absolute_expression ();
5257 if (* input_line_pointer == ',')
5259 ++ input_line_pointer;
5261 count = get_absolute_expression ();
5263 as_warn (_(".incbin count zero, ignoring `%s'"), filename);
5269 demand_empty_rest_of_line ();
5271 /* Try opening absolute path first, then try include dirs. */
5272 binfile = fopen (filename, FOPEN_RB);
5273 if (binfile == NULL)
5277 path = xmalloc ((unsigned long) len + include_dir_maxlen + 5);
5279 for (i = 0; i < include_dir_count; i++)
5281 sprintf (path, "%s/%s", include_dirs[i], filename);
5283 binfile = fopen (path, FOPEN_RB);
5284 if (binfile != NULL)
5288 if (binfile == NULL)
5289 as_bad (_("file not found: %s"), filename);
5292 path = xstrdup (filename);
5298 register_dependency (path);
5300 /* Compute the length of the file. */
5301 if (fseek (binfile, 0, SEEK_END) != 0)
5303 as_bad (_("seek to end of .incbin file failed `%s'"), path);
5306 file_len = ftell (binfile);
5308 /* If a count was not specified use the remainder of the file. */
5310 count = file_len - skip;
5312 if (skip < 0 || count < 0 || file_len < 0 || skip + count > file_len)
5314 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5315 skip, count, file_len);
5319 if (fseek (binfile, skip, SEEK_SET) != 0)
5321 as_bad (_("could not skip to %ld in file `%s'"), skip, path);
5325 /* Allocate frag space and store file contents in it. */
5326 binfrag = frag_more (count);
5328 bytes = fread (binfrag, 1, count, binfile);
5330 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5331 path, bytes, count);
5334 if (binfile != NULL)
5340 /* .include -- include a file at this point. */
5343 s_include (int arg ATTRIBUTE_UNUSED)
5352 filename = demand_copy_string (&i);
5353 if (filename == NULL)
5355 /* demand_copy_string has already printed an error and
5356 called ignore_rest_of_line. */
5364 while (!is_end_of_line[(unsigned char) *input_line_pointer]
5365 && *input_line_pointer != ' '
5366 && *input_line_pointer != '\t')
5368 obstack_1grow (¬es, *input_line_pointer);
5369 ++input_line_pointer;
5373 obstack_1grow (¬es, '\0');
5374 filename = obstack_finish (¬es);
5375 while (!is_end_of_line[(unsigned char) *input_line_pointer])
5376 ++input_line_pointer;
5379 demand_empty_rest_of_line ();
5380 path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ );
5382 for (i = 0; i < include_dir_count; i++)
5384 strcpy (path, include_dirs[i]);
5386 strcat (path, filename);
5387 if (0 != (try = fopen (path, FOPEN_RT)))
5397 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5398 register_dependency (path);
5399 input_scrub_insert_file (path);
5403 add_include_dir (char *path)
5407 if (include_dir_count == 0)
5409 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
5410 include_dirs[0] = "."; /* Current dir. */
5411 include_dir_count = 2;
5415 include_dir_count++;
5417 (char **) realloc (include_dirs,
5418 include_dir_count * sizeof (*include_dirs));
5421 include_dirs[include_dir_count - 1] = path; /* New one. */
5424 if (i > include_dir_maxlen)
5425 include_dir_maxlen = i;
5428 /* Output debugging information to denote the source file. */
5431 generate_file_debug (void)
5433 if (debug_type == DEBUG_STABS)
5434 stabs_generate_asm_file ();
5437 /* Output line number debugging information for the current source line. */
5440 generate_lineno_debug (void)
5444 case DEBUG_UNSPECIFIED:
5449 stabs_generate_asm_lineno ();
5452 ecoff_generate_asm_lineno ();
5455 /* ??? We could here indicate to dwarf2dbg.c that something
5456 has changed. However, since there is additional backend
5457 support that is required (calling dwarf2_emit_insn), we
5458 let dwarf2dbg.c call as_where on its own. */
5463 /* Output debugging information to mark a function entry point or end point.
5464 END_P is zero for .func, and non-zero for .endfunc. */
5469 do_s_func (end_p, NULL);
5472 /* Subroutine of s_func so targets can choose a different default prefix.
5473 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5476 do_s_func (int end_p, const char *default_prefix)
5478 /* Record the current function so that we can issue an error message for
5479 misplaced .func,.endfunc, and also so that .endfunc needs no
5481 static char *current_name;
5482 static char *current_label;
5486 if (current_name == NULL)
5488 as_bad (_("missing .func"));
5489 ignore_rest_of_line ();
5493 if (debug_type == DEBUG_STABS)
5494 stabs_generate_asm_endfunc (current_name, current_label);
5496 current_name = current_label = NULL;
5501 char delim1, delim2;
5503 if (current_name != NULL)
5505 as_bad (_(".endfunc missing for previous .func"));
5506 ignore_rest_of_line ();
5510 name = input_line_pointer;
5511 delim1 = get_symbol_end ();
5512 name = xstrdup (name);
5513 *input_line_pointer = delim1;
5515 if (*input_line_pointer != ',')
5518 asprintf (&label, "%s%s", default_prefix, name);
5521 char leading_char = bfd_get_symbol_leading_char (stdoutput);
5522 /* Missing entry point, use function's name with the leading
5525 asprintf (&label, "%c%s", leading_char, name);
5532 ++input_line_pointer;
5534 label = input_line_pointer;
5535 delim2 = get_symbol_end ();
5536 label = xstrdup (label);
5537 *input_line_pointer = delim2;
5540 if (debug_type == DEBUG_STABS)
5541 stabs_generate_asm_func (name, label);
5543 current_name = name;
5544 current_label = label;
5547 demand_empty_rest_of_line ();
5551 s_ignore (int arg ATTRIBUTE_UNUSED)
5553 ignore_rest_of_line ();
5557 read_print_statistics (FILE *file)
5559 hash_print_statistics (file, "pseudo-op table", po_hash);
5562 /* Inserts the given line into the input stream.
5564 This call avoids macro/conditionals nesting checking, since the contents of
5565 the line are assumed to replace the contents of a line already scanned.
5567 An appropriate use of this function would be substitution of input lines when
5568 called by md_start_line_hook(). The given line is assumed to already be
5569 properly scrubbed. */
5572 input_scrub_insert_line (const char *line)
5576 sb_add_string (&newline, line);
5577 input_scrub_include_sb (&newline, input_line_pointer, 0);
5579 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5582 /* Insert a file into the input stream; the path must resolve to an actual
5583 file; no include path searching or dependency registering is performed. */
5586 input_scrub_insert_file (char *path)
5588 input_scrub_include_file (path, input_line_pointer);
5589 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5592 /* Find the end of a line, considering quotation and escaping of quotes. */
5594 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5595 # define TC_SINGLE_QUOTE_STRINGS 1
5599 _find_end_of_line (char *s, int mri_string, int insn ATTRIBUTE_UNUSED)
5601 char inquote = '\0';
5604 while (!is_end_of_line[(unsigned char) *s]
5605 || (inquote && !ISCNTRL (*s))
5606 || (inquote == '\'' && flag_mri)
5607 #ifdef TC_EOL_IN_INSN
5608 || (insn && TC_EOL_IN_INSN (s))
5612 if (mri_string && *s == '\'')
5616 else if (*s == '\\')
5620 #ifdef TC_SINGLE_QUOTE_STRINGS
5621 || (TC_SINGLE_QUOTE_STRINGS && *s == '\'')
5628 as_warn (_("missing closing `%c'"), inquote);
5630 as_warn (_("stray `\\'"));
5635 find_end_of_line (char *s, int mri_string)
5637 return _find_end_of_line (s, mri_string, 0);