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
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"
43 #include "dw2gencfi.h"
45 #ifndef TC_START_LABEL
46 #define TC_START_LABEL(x,y) (x == ':')
49 /* Set by the object-format or the target. */
50 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
51 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
56 else if ((SIZE) >= 4) \
58 else if ((SIZE) >= 2) \
66 char *input_line_pointer; /*->next char of source file to parse. */
68 #if BITS_PER_CHAR != 8
69 /* The following table is indexed by[(char)] and will break if
70 a char does not have exactly 256 states (hopefully 0:255!)! */
79 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
84 /* The Delta 68k assembler permits % inside label names. */
89 /* The PowerPC Windows NT assemblers permits ? inside label names. */
94 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
95 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
104 /* The Delta 68k assembler permits ~ at start of label names. */
108 /* Used by is_... macros. our ctype[]. */
109 char lex_type[256] = {
110 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
111 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
112 0, 0, 0, LEX_HASH, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
113 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
114 LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
115 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
116 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
117 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */
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,
125 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
129 Out: 1 if this character ends a line. */
130 char is_end_of_line[256] = {
132 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
134 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
136 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
137 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
140 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
141 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
142 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
143 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
144 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
145 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
146 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
147 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
148 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
150 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
153 #ifndef TC_CASE_SENSITIVE
154 char original_case_string[128];
157 /* Functions private to this file. */
159 static char *buffer; /* 1st char of each buffer of lines is here. */
160 static char *buffer_limit; /*->1 + last char in buffer. */
162 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
163 in the tc-<CPU>.h file. See the "Porting GAS" section of the
165 int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
167 /* Variables for handling include file directory table. */
169 /* Table of pointers to directories to search for .include's. */
172 /* How many are in the table. */
173 int include_dir_count;
175 /* Length of longest in table. */
176 int include_dir_maxlen = 1;
178 #ifndef WORKING_DOT_WORD
179 struct broken_word *broken_words;
180 int new_broken_words;
183 /* The current offset into the absolute section. We don't try to
184 build frags in the absolute section, since no data can be stored
185 there. We just keep track of the current offset. */
186 addressT abs_section_offset;
188 /* If this line had an MRI style label, it is stored in this variable.
189 This is used by some of the MRI pseudo-ops. */
192 /* This global variable is used to support MRI common sections. We
193 translate such sections into a common symbol. This variable is
194 non-NULL when we are in an MRI common section. */
195 symbolS *mri_common_symbol;
197 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
198 need to align to an even byte boundary unless the next pseudo-op is
199 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
201 static int mri_pending_align;
205 /* This variable is set to be non-zero if the next string we see might
206 be the name of the source file in DWARF debugging information. See
207 the comment in emit_expr for the format we look for. */
208 static int dwarf_file_string;
212 static void do_s_func (int end_p, const char *default_prefix);
213 static void do_align (int, char *, int, int);
214 static void s_align (int, int);
215 static void s_altmacro (int);
216 static void s_bad_end (int);
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},
327 {"error", s_errwarn, 1},
328 {"exitm", s_mexit, 0},
330 {"extern", s_ignore, 0}, /* We treat all undef as ext. */
331 {"appfile", s_app_file, 1},
332 {"appline", s_app_line, 0},
334 {"file", s_app_file, 0},
336 {"float", float_cons, 'f'},
337 {"format", s_ignore, 0},
339 {"global", s_globl, 0},
340 {"globl", s_globl, 0},
342 {"if", s_if, (int) O_ne},
345 {"ifdef", s_ifdef, 0},
346 {"ifeq", s_if, (int) O_eq},
347 {"ifeqs", s_ifeqs, 0},
348 {"ifge", s_if, (int) O_ge},
349 {"ifgt", s_if, (int) O_gt},
350 {"ifle", s_if, (int) O_le},
351 {"iflt", s_if, (int) O_lt},
354 {"ifndef", s_ifdef, 1},
355 {"ifne", s_if, (int) O_ne},
356 {"ifnes", s_ifeqs, 1},
357 {"ifnotdef", s_ifdef, 1},
358 {"incbin", s_incbin, 0},
359 {"include", s_include, 0},
365 {"lcomm", s_lcomm, 0},
366 {"lflags", listing_flags, 0}, /* Listing flags. */
367 {"linkonce", s_linkonce, 0},
368 {"list", listing_list, 1}, /* Turn listing on. */
369 {"llen", listing_psize, 1},
372 {"macro", s_macro, 0},
373 {"mexit", s_mexit, 0},
375 {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
376 {"name", s_ignore, 0},
377 {"noaltmacro", s_altmacro, 0},
378 {"noformat", s_ignore, 0},
379 {"nolist", listing_list, 0}, /* Turn listing off. */
380 {"nopage", listing_nopage, 0},
382 {"offset", s_struct, 0},
384 {"p2align", s_align_ptwo, 0},
385 {"p2alignw", s_align_ptwo, -2},
386 {"p2alignl", s_align_ptwo, -4},
387 {"page", listing_eject, 0},
388 {"plen", listing_psize, 0},
389 {"print", s_print, 0},
390 {"psize", listing_psize, 0}, /* Set paper size. */
391 {"purgem", s_purgem, 0},
396 {"sbttl", listing_title, 1}, /* Subtitle of listing. */
401 {"single", float_cons, 'f'},
403 {"space", s_space, 0},
404 {"skip", s_space, 0},
405 {"sleb128", s_leb128, 1},
406 {"spc", s_ignore, 0},
407 {"stabd", s_stab, 'd'},
408 {"stabn", s_stab, 'n'},
409 {"stabs", s_stab, 's'},
410 {"string", stringer, 1},
411 {"struct", s_struct, 0},
415 /* This is for gcc to use. It's only just been added (2/94), so gcc
416 won't be able to use it for a while -- probably a year or more.
417 But once this has been released, check with gcc maintainers
418 before deleting it or even changing the spelling. */
419 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
420 /* If we're folding case -- done for some targets, not necessarily
421 all -- the above string in an input file will be converted to
422 this one. Match it either way... */
423 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
425 {"title", listing_title, 0}, /* Listing title. */
426 {"ttl", listing_title, 0},
428 {"uleb128", s_leb128, 0},
432 {"xdef", s_globl, 0},
433 {"xref", s_ignore, 0},
434 {"xstabs", s_xstab, 's'},
435 {"warning", s_errwarn, 0},
437 {"zero", s_space, 0},
438 {NULL, NULL, 0} /* End sentinel. */
442 get_absolute_expr (expressionS *exp)
445 if (exp->X_op != O_constant)
447 if (exp->X_op != O_absent)
448 as_bad (_("bad or irreducible absolute expression"));
449 exp->X_add_number = 0;
451 return exp->X_add_number;
455 get_absolute_expression (void)
459 return get_absolute_expr (&exp);
462 static int pop_override_ok = 0;
463 static const char *pop_table_name;
466 pop_insert (const pseudo_typeS *table)
469 const pseudo_typeS *pop;
470 for (pop = table; pop->poc_name; pop++)
472 errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
473 if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
474 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name,
479 #ifndef md_pop_insert
480 #define md_pop_insert() pop_insert(md_pseudo_table)
483 #ifndef obj_pop_insert
484 #define obj_pop_insert() pop_insert(obj_pseudo_table)
487 #ifndef cfi_pop_insert
488 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
494 po_hash = hash_new ();
496 /* Do the target-specific pseudo ops. */
497 pop_table_name = "md";
500 /* Now object specific. Skip any that were in the target table. */
501 pop_table_name = "obj";
505 /* Now portable ones. Skip any that we've seen already. */
506 pop_table_name = "standard";
507 pop_insert (potable);
509 #ifdef TARGET_USE_CFIPOP
510 pop_table_name = "cfi";
516 #define HANDLE_CONDITIONAL_ASSEMBLY() \
517 if (ignore_input ()) \
519 char *eol = find_end_of_line (input_line_pointer, flag_m68k_mri); \
520 input_line_pointer = (input_line_pointer <= buffer_limit \
521 && eol >= buffer_limit) \
527 /* This function is used when scrubbing the characters between #APP
530 static char *scrub_string;
531 static char *scrub_string_end;
534 scrub_from_string (char *buf, int buflen)
538 copy = scrub_string_end - scrub_string;
541 memcpy (buf, scrub_string, copy);
542 scrub_string += copy;
546 /* Helper function of read_a_source_file, which tries to expand a macro. */
548 try_macro (char term, const char *line)
554 if (check_macro (line, &out, &err, ¯o))
558 *input_line_pointer++ = term;
559 input_scrub_include_sb (&out,
560 input_line_pointer, 1);
563 input_scrub_next_buffer (&input_line_pointer);
565 md_macro_info (macro);
572 /* We read the file, putting things into a web that represents what we
573 have been reading. */
575 read_a_source_file (char *name)
578 register char *s; /* String of symbol, '\0' appended. */
586 buffer = input_scrub_new_file (name);
589 listing_newline (NULL);
590 register_dependency (name);
592 /* Generate debugging information before we've read anything in to denote
593 this file as the "main" source file and not a subordinate one
594 (e.g. N_SO vs N_SOL in stabs). */
595 generate_file_debug ();
597 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
598 { /* We have another line to parse. */
600 /* In order to avoid listing macro expansion lines with labels
601 multiple times, keep track of which line was last issued. */
602 static char *last_eol;
606 know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */
608 while (input_line_pointer < buffer_limit)
610 /* We have more of this buffer to parse. */
612 /* We now have input_line_pointer->1st char of next line.
613 If input_line_pointer [-1] == '\n' then we just
614 scanned another line: so bump line counters. */
615 if (is_end_of_line[(unsigned char) input_line_pointer[-1]])
617 #ifdef md_start_line_hook
618 md_start_line_hook ();
620 if (input_line_pointer[-1] == '\n')
621 bump_line_counters ();
625 if (LABELS_WITHOUT_COLONS || flag_m68k_mri)
627 /* Text at the start of a line must be a label, we
628 run down and stick a colon in. */
629 if (is_name_beginner (*input_line_pointer))
631 char *line_start = input_line_pointer;
636 HANDLE_CONDITIONAL_ASSEMBLY ();
638 c = get_symbol_end ();
640 /* In MRI mode, the EQU and MACRO pseudoops must
641 be handled specially. */
645 char *rest = input_line_pointer + 1;
649 if (*rest == ' ' || *rest == '\t')
651 if ((strncasecmp (rest, "EQU", 3) == 0
652 || strncasecmp (rest, "SET", 3) == 0)
653 && (rest[3] == ' ' || rest[3] == '\t'))
655 input_line_pointer = rest + 3;
657 strncasecmp (rest, "SET", 3) == 0);
660 if (strncasecmp (rest, "MACRO", 5) == 0
663 || is_end_of_line[(unsigned char) rest[5]]))
667 /* In MRI mode, we need to handle the MACRO
668 pseudo-op specially: we don't want to put the
669 symbol in the symbol table. */
671 #ifdef TC_START_LABEL_WITHOUT_COLON
672 && TC_START_LABEL_WITHOUT_COLON(c,
676 line_label = colon (line_start);
678 line_label = symbol_create (line_start,
683 *input_line_pointer = c;
685 input_line_pointer++;
690 /* We are at the beginning of a line, or similar place.
691 We expect a well-formed assembler statement.
692 A "symbol-name:" is a statement.
694 Depending on what compiler is used, the order of these tests
695 may vary to catch most common case 1st.
696 Each test is independent of all other tests at the (top) level.
697 PLEASE make a compiler that doesn't use this assembler.
698 It is crufty to waste a compiler's time encoding things for this
699 assembler, which then wastes more time decoding it.
700 (And communicating via (linear) files is silly!
701 If you must pass stuff, please pass a tree!) */
702 if ((c = *input_line_pointer++) == '\t'
706 c = *input_line_pointer++;
708 know (c != ' '); /* No further leading whitespace. */
711 /* If listing is on, and we are expanding a macro, then give
712 the listing code the contents of the expanded line. */
715 if ((listing & LISTING_MACEXP) && macro_nest > 0)
720 /* Find the end of the current expanded macro line. */
721 s = find_end_of_line (input_line_pointer - 1, flag_m68k_mri);
726 /* Copy it for safe keeping. Also give an indication of
727 how much macro nesting is involved at this point. */
728 len = s - (input_line_pointer - 1);
729 copy = (char *) xmalloc (len + macro_nest + 2);
730 memset (copy, '>', macro_nest);
731 copy[macro_nest] = ' ';
732 memcpy (copy + macro_nest + 1, input_line_pointer - 1, len);
733 copy[macro_nest + 1 + len] = '\0';
735 /* Install the line with the listing facility. */
736 listing_newline (copy);
740 listing_newline (NULL);
743 /* C is the 1st significant character.
744 Input_line_pointer points after that character. */
745 if (is_name_beginner (c))
747 /* Want user-defined label or pseudo/opcode. */
748 HANDLE_CONDITIONAL_ASSEMBLY ();
750 s = --input_line_pointer;
751 c = get_symbol_end (); /* name's delimiter. */
753 /* C is character after symbol.
754 That character's place in the input line is now '\0'.
755 S points to the beginning of the symbol.
756 [In case of pseudo-op, s->'.'.]
757 Input_line_pointer->'\0' where c was. */
758 if (TC_START_LABEL (c, input_line_pointer))
762 char *rest = input_line_pointer + 1;
764 /* In MRI mode, \tsym: set 0 is permitted. */
768 if (*rest == ' ' || *rest == '\t')
771 if ((strncasecmp (rest, "EQU", 3) == 0
772 || strncasecmp (rest, "SET", 3) == 0)
773 && (rest[3] == ' ' || rest[3] == '\t'))
775 input_line_pointer = rest + 3;
781 line_label = colon (s); /* User-defined label. */
782 /* Put ':' back for error messages' sake. */
783 *input_line_pointer++ = ':';
784 #ifdef tc_check_label
785 tc_check_label (line_label);
787 /* Input_line_pointer->after ':'. */
791 || ((c == ' ' || c == '\t')
792 && input_line_pointer[1] == '='))
793 #ifdef TC_EQUAL_IN_INSN
794 && !TC_EQUAL_IN_INSN (c, s)
799 demand_empty_rest_of_line ();
803 /* Expect pseudo-op or machine instruction. */
806 #ifndef TC_CASE_SENSITIVE
810 strncpy (original_case_string, s2, sizeof (original_case_string));
811 original_case_string[sizeof (original_case_string) - 1] = 0;
820 if (NO_PSEUDO_DOT || flag_m68k_mri)
822 /* The MRI assembler uses pseudo-ops without
824 pop = (pseudo_typeS *) hash_find (po_hash, s);
825 if (pop != NULL && pop->poc_handler == NULL)
830 || (!flag_m68k_mri && *s == '.'))
834 WARNING: c has next char, which may be end-of-line.
835 We lookup the pseudo-op table with s+1 because we
836 already know that the pseudo-op begins with a '.'. */
839 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
840 if (pop && !pop->poc_handler)
843 /* In MRI mode, we may need to insert an
844 automatic alignment directive. What a hack
846 if (mri_pending_align
848 || !((pop->poc_handler == cons
849 && pop->poc_val == 1)
850 || (pop->poc_handler == s_space
851 && pop->poc_val == 1)
852 #ifdef tc_conditional_pseudoop
853 || tc_conditional_pseudoop (pop)
855 || pop->poc_handler == s_if
856 || pop->poc_handler == s_ifdef
857 || pop->poc_handler == s_ifc
858 || pop->poc_handler == s_ifeqs
859 || pop->poc_handler == s_else
860 || pop->poc_handler == s_endif
861 || pop->poc_handler == s_globl
862 || pop->poc_handler == s_ignore)))
864 do_align (1, (char *) NULL, 0, 0);
865 mri_pending_align = 0;
867 if (line_label != NULL)
869 symbol_set_frag (line_label, frag_now);
870 S_SET_VALUE (line_label, frag_now_fix ());
874 /* Print the error msg now, while we still can. */
877 char *end = input_line_pointer;
879 *input_line_pointer = c;
881 c = *--input_line_pointer;
882 *input_line_pointer = '\0';
883 if (! macro_defined || ! try_macro (c, s))
886 as_bad (_("unknown pseudo-op: `%s'"), s);
887 *input_line_pointer++ = c;
892 /* Put it back for error messages etc. */
893 *input_line_pointer = c;
894 /* The following skip of whitespace is compulsory.
895 A well shaped space is sometimes all that separates
896 keyword from operands. */
897 if (c == ' ' || c == '\t')
898 input_line_pointer++;
900 /* Input_line is restored.
901 Input_line_pointer->1st non-blank char
902 after pseudo-operation. */
903 (*pop->poc_handler) (pop->poc_val);
905 /* If that was .end, just get out now. */
906 if (pop->poc_handler == s_end)
911 /* WARNING: c has char, which may be end-of-line. */
912 /* Also: input_line_pointer->`\0` where c was. */
913 *input_line_pointer = c;
914 input_line_pointer = _find_end_of_line (input_line_pointer, flag_m68k_mri, 1);
915 c = *input_line_pointer;
916 *input_line_pointer = '\0';
918 generate_lineno_debug ();
920 if (macro_defined && try_macro (c, s))
923 if (mri_pending_align)
925 do_align (1, (char *) NULL, 0, 0);
926 mri_pending_align = 0;
927 if (line_label != NULL)
929 symbol_set_frag (line_label, frag_now);
930 S_SET_VALUE (line_label, frag_now_fix ());
934 md_assemble (s); /* Assemble 1 instruction. */
936 *input_line_pointer++ = c;
938 /* We resume loop AFTER the end-of-line from
945 /* Empty statement? */
946 if (is_end_of_line[(unsigned char) c])
949 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) && ISDIGIT (c))
951 /* local label ("4:") */
952 char *backup = input_line_pointer;
954 HANDLE_CONDITIONAL_ASSEMBLY ();
958 /* Read the whole number. */
959 while (ISDIGIT (*input_line_pointer))
961 temp = (temp * 10) + *input_line_pointer - '0';
962 ++input_line_pointer;
965 if (LOCAL_LABELS_DOLLAR
966 && *input_line_pointer == '$'
967 && *(input_line_pointer + 1) == ':')
969 input_line_pointer += 2;
971 if (dollar_label_defined (temp))
973 as_fatal (_("label \"%d$\" redefined"), temp);
976 define_dollar_label (temp);
977 colon (dollar_label_name (temp, 0));
982 && *input_line_pointer++ == ':')
984 fb_label_instance_inc (temp);
985 colon (fb_label_name (temp, 0));
989 input_line_pointer = backup;
990 } /* local label ("4:") */
992 if (c && strchr (line_comment_chars, c))
993 { /* Its a comment. Better say APP or NO_APP. */
998 unsigned int new_length;
1001 bump_line_counters ();
1002 s = input_line_pointer;
1003 if (strncmp (s, "APP\n", 4))
1004 continue; /* We ignore it */
1008 ends = strstr (s, "#NO_APP\n");
1012 unsigned int tmp_len;
1015 /* The end of the #APP wasn't in this buffer. We
1016 keep reading in buffers until we find the #NO_APP
1017 that goes with this #APP There is one. The specs
1019 tmp_len = buffer_limit - s;
1020 tmp_buf = xmalloc (tmp_len + 1);
1021 memcpy (tmp_buf, s, tmp_len);
1024 new_tmp = input_scrub_next_buffer (&buffer);
1028 buffer_limit = new_tmp;
1029 input_line_pointer = buffer;
1030 ends = strstr (buffer, "#NO_APP\n");
1032 num = ends - buffer;
1034 num = buffer_limit - buffer;
1036 tmp_buf = xrealloc (tmp_buf, tmp_len + num);
1037 memcpy (tmp_buf + tmp_len, buffer, num);
1042 input_line_pointer = ends ? ends + 8 : NULL;
1050 input_line_pointer = ends + 8;
1054 scrub_string_end = ends;
1056 new_length = ends - s;
1057 new_buf = (char *) xmalloc (new_length);
1064 space = (new_buf + new_length) - new_tmp;
1065 size = do_scrub_chars (scrub_from_string, new_tmp, space);
1073 new_buf = xrealloc (new_buf, new_length + 100);
1074 new_tmp = new_buf + new_length;
1081 /* We've "scrubbed" input to the preferred format. In the
1082 process we may have consumed the whole of the remaining
1083 file (and included files). We handle this formatted
1084 input similar to that of macro expansion, letting
1085 actual macro expansion (possibly nested) and other
1086 input expansion work. Beware that in messages, line
1087 numbers and possibly file names will be incorrect. */
1088 sb_add_string (&sbuf, new_buf);
1089 input_scrub_include_sb (&sbuf, input_line_pointer, 0);
1091 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1096 HANDLE_CONDITIONAL_ASSEMBLY ();
1098 #ifdef tc_unrecognized_line
1099 if (tc_unrecognized_line (c))
1102 input_line_pointer--;
1103 /* Report unknown char as ignored. */
1104 demand_empty_rest_of_line ();
1107 #ifdef md_after_pass_hook
1108 md_after_pass_hook ();
1117 /* Close the input file. */
1118 input_scrub_close ();
1119 #ifdef WARN_COMMENTS
1121 if (warn_comment && found_comment)
1122 as_warn_where (found_comment_file, found_comment,
1123 "first comment found here");
1128 /* Convert O_constant expression EXP into the equivalent O_big representation.
1129 Take the sign of the number from X_unsigned rather than X_add_number. */
1132 convert_to_bignum (expressionS *exp)
1137 value = exp->X_add_number;
1138 for (i = 0; i < sizeof (exp->X_add_number) / CHARS_PER_LITTLENUM; i++)
1140 generic_bignum[i] = value & LITTLENUM_MASK;
1141 value >>= LITTLENUM_NUMBER_OF_BITS;
1143 /* Add a sequence of sign bits if the top bit of X_add_number is not
1144 the sign of the original value. */
1145 if ((exp->X_add_number < 0) != !exp->X_unsigned)
1146 generic_bignum[i++] = exp->X_unsigned ? 0 : LITTLENUM_MASK;
1148 exp->X_add_number = i;
1151 /* For most MRI pseudo-ops, the line actually ends at the first
1152 nonquoted space. This function looks for that point, stuffs a null
1153 in, and sets *STOPCP to the character that used to be there, and
1154 returns the location.
1156 Until I hear otherwise, I am going to assume that this is only true
1157 for the m68k MRI assembler. */
1160 mri_comment_field (char *stopcp)
1166 know (flag_m68k_mri);
1168 for (s = input_line_pointer;
1169 ((!is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
1177 for (s = input_line_pointer;
1178 !is_end_of_line[(unsigned char) *s];
1188 /* Skip to the end of an MRI comment field. */
1191 mri_comment_end (char *stop, int stopc)
1195 input_line_pointer = stop;
1197 while (!is_end_of_line[(unsigned char) *input_line_pointer])
1198 ++input_line_pointer;
1202 s_abort (int ignore ATTRIBUTE_UNUSED)
1204 as_fatal (_(".abort detected. Abandoning ship."));
1207 /* Guts of .align directive. N is the power of two to which to align.
1208 FILL may be NULL, or it may point to the bytes of the fill pattern.
1209 LEN is the length of whatever FILL points to, if anything. MAX is
1210 the maximum number of characters to skip when doing the alignment,
1211 or 0 if there is no maximum. */
1214 do_align (int n, char *fill, int len, int max)
1216 if (now_seg == absolute_section)
1220 if (*fill++ != '\0')
1222 as_warn (_("ignoring fill value in absolute section"));
1229 #ifdef md_flush_pending_output
1230 md_flush_pending_output ();
1233 md_do_align (n, fill, len, max, just_record_alignment);
1236 /* Only make a frag if we HAVE to... */
1237 if (n != 0 && !need_pass_2)
1241 if (subseg_text_p (now_seg))
1242 frag_align_code (n, max);
1244 frag_align (n, 0, max);
1247 frag_align (n, *fill, max);
1249 frag_align_pattern (n, fill, len, max);
1253 just_record_alignment: ATTRIBUTE_UNUSED_LABEL
1256 record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
1259 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1260 (in bytes). A negative ARG is the negative of the length of the
1261 fill pattern. BYTES_P is non-zero if the alignment value should be
1262 interpreted as the byte boundary, rather than the power of 2. */
1264 #define ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1267 s_align (int arg, int bytes_p)
1269 unsigned int align_limit = ALIGN_LIMIT;
1278 stop = mri_comment_field (&stopc);
1280 if (is_end_of_line[(unsigned char) *input_line_pointer])
1285 align = arg; /* Default value from pseudo-op table. */
1289 align = get_absolute_expression ();
1295 /* Convert to a power of 2. */
1300 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1303 as_bad (_("alignment not a power of 2"));
1309 if (align > align_limit)
1311 align = align_limit;
1312 as_warn (_("alignment too large: %u assumed"), align);
1315 if (*input_line_pointer != ',')
1322 ++input_line_pointer;
1323 if (*input_line_pointer == ',')
1327 fill = get_absolute_expression ();
1332 if (*input_line_pointer != ',')
1336 ++input_line_pointer;
1337 max = get_absolute_expression ();
1344 as_warn (_("expected fill pattern missing"));
1345 do_align (align, (char *) NULL, 0, max);
1360 do_align (align, &fill_char, fill_len, max);
1366 if ((size_t) fill_len > sizeof ab)
1368 md_number_to_chars (ab, fill, fill_len);
1369 do_align (align, ab, fill_len, max);
1373 demand_empty_rest_of_line ();
1376 mri_comment_end (stop, stopc);
1379 /* Handle the .align pseudo-op on machines where ".align 4" means
1380 align to a 4 byte boundary. */
1383 s_align_bytes (int arg)
1388 /* Handle the .align pseudo-op on machines where ".align 4" means align
1389 to a 2**4 boundary. */
1392 s_align_ptwo (int arg)
1397 /* Switch in and out of alternate macro mode. */
1402 demand_empty_rest_of_line ();
1403 macro_set_alternate (on);
1407 s_comm_internal (int param,
1408 symbolS *(*comm_parse_extra) (int, symbolS *, addressT))
1414 symbolS *symbolP = NULL;
1420 stop = mri_comment_field (&stopc);
1422 name = input_line_pointer;
1423 c = get_symbol_end ();
1424 /* Just after name is now '\0'. */
1425 p = input_line_pointer;
1430 as_bad (_("expected symbol name"));
1431 ignore_rest_of_line ();
1437 /* Accept an optional comma after the name. The comma used to be
1438 required, but Irix 5 cc does not generate it for .lcomm. */
1439 if (*input_line_pointer == ',')
1440 input_line_pointer++;
1442 temp = get_absolute_expr (&exp);
1444 size &= ((offsetT) 2 << (stdoutput->arch_info->bits_per_address - 1)) - 1;
1445 if (exp.X_op == O_absent)
1447 as_bad (_("missing size expression"));
1448 ignore_rest_of_line ();
1451 else if (temp != size || !exp.X_unsigned)
1453 as_warn (_("size (%ld) out of range, ignored"), (long) temp);
1454 ignore_rest_of_line ();
1459 symbolP = symbol_find_or_make (name);
1460 if (S_IS_DEFINED (symbolP) && !S_IS_COMMON (symbolP))
1463 as_bad (_("symbol `%s' is already defined"), name);
1465 ignore_rest_of_line ();
1469 size = S_GET_VALUE (symbolP);
1472 else if (size != temp)
1473 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1474 name, (long) size, (long) temp);
1477 if (comm_parse_extra != NULL)
1478 symbolP = (*comm_parse_extra) (param, symbolP, size);
1481 S_SET_VALUE (symbolP, (valueT) size);
1482 S_SET_EXTERNAL (symbolP);
1485 extern int flag_one;
1486 if (size == 0 || !flag_one)
1487 S_GET_OTHER (symbolP) = const_flag;
1492 demand_empty_rest_of_line ();
1495 mri_comment_end (stop, stopc);
1502 s_comm_internal (ignore, NULL);
1505 /* The MRI COMMON pseudo-op. We handle this by creating a common
1506 symbol with the appropriate name. We make s_space do the right
1507 thing by increasing the size. */
1510 s_mri_common (int small ATTRIBUTE_UNUSED)
1526 stop = mri_comment_field (&stopc);
1530 name = input_line_pointer;
1531 if (!ISDIGIT (*name))
1532 c = get_symbol_end ();
1537 ++input_line_pointer;
1539 while (ISDIGIT (*input_line_pointer));
1541 c = *input_line_pointer;
1542 *input_line_pointer = '\0';
1544 if (line_label != NULL)
1546 alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
1547 + (input_line_pointer - name)
1549 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1554 sym = symbol_find_or_make (name);
1555 *input_line_pointer = c;
1559 if (*input_line_pointer != ',')
1563 ++input_line_pointer;
1564 align = get_absolute_expression ();
1567 if (S_IS_DEFINED (sym) && !S_IS_COMMON (sym))
1569 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym));
1570 ignore_rest_of_line ();
1571 mri_comment_end (stop, stopc);
1575 S_SET_EXTERNAL (sym);
1576 mri_common_symbol = sym;
1580 S_SET_ALIGN (sym, align);
1583 if (line_label != NULL)
1586 exp.X_op = O_symbol;
1587 exp.X_add_symbol = sym;
1588 exp.X_add_number = 0;
1589 symbol_set_value_expression (line_label, &exp);
1590 symbol_set_frag (line_label, &zero_address_frag);
1591 S_SET_SEGMENT (line_label, expr_section);
1594 /* FIXME: We just ignore the small argument, which distinguishes
1595 COMMON and COMMON.S. I don't know what we can do about it. */
1597 /* Ignore the type and hptype. */
1598 if (*input_line_pointer == ',')
1599 input_line_pointer += 2;
1600 if (*input_line_pointer == ',')
1601 input_line_pointer += 2;
1603 demand_empty_rest_of_line ();
1605 mri_comment_end (stop, stopc);
1609 s_data (int ignore ATTRIBUTE_UNUSED)
1614 temp = get_absolute_expression ();
1615 if (flag_readonly_data_in_text)
1617 section = text_section;
1621 section = data_section;
1623 subseg_set (section, (subsegT) temp);
1628 demand_empty_rest_of_line ();
1631 /* Handle the .appfile pseudo-op. This is automatically generated by
1632 do_scrub_chars when a preprocessor # line comment is seen with a
1633 file name. This default definition may be overridden by the object
1634 or CPU specific pseudo-ops. This function is also the default
1635 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1639 s_app_file_string (char *file, int appfile ATTRIBUTE_UNUSED)
1643 listing_source_file (file);
1645 register_dependency (file);
1647 obj_app_file (file, appfile);
1652 s_app_file (int appfile)
1657 /* Some assemblers tolerate immediately following '"'. */
1658 if ((s = demand_copy_string (&length)) != 0)
1660 /* If this is a fake .appfile, a fake newline was inserted into
1661 the buffer. Passing -2 to new_logical_line tells it to
1664 = (!new_logical_line (s, appfile ? -2 : -1) && appfile);
1666 /* In MRI mode, the preprocessor may have inserted an extraneous
1669 && *input_line_pointer == '\''
1670 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1671 ++input_line_pointer;
1673 demand_empty_rest_of_line ();
1675 s_app_file_string (s, appfile);
1679 /* Handle the .appline pseudo-op. This is automatically generated by
1680 do_scrub_chars when a preprocessor # line comment is seen. This
1681 default definition may be overridden by the object or CPU specific
1685 s_app_line (int ignore ATTRIBUTE_UNUSED)
1689 /* The given number is that of the next line. */
1690 l = get_absolute_expression () - 1;
1693 /* Some of the back ends can't deal with non-positive line numbers.
1694 Besides, it's silly. GCC however will generate a line number of
1695 zero when it is pre-processing builtins for assembler-with-cpp files:
1699 We do not want to barf on this, especially since such files are used
1700 in the GCC and GDB testsuites. So we check for negative line numbers
1701 rather than non-positive line numbers. */
1702 as_warn (_("line numbers must be positive; line number %d rejected"),
1706 new_logical_line ((char *) NULL, l);
1709 listing_source_line (l);
1712 demand_empty_rest_of_line ();
1715 /* Handle the .end pseudo-op. Actually, the real work is done in
1716 read_a_source_file. */
1719 s_end (int ignore ATTRIBUTE_UNUSED)
1723 /* The MRI assembler permits the start symbol to follow .end,
1724 but we don't support that. */
1726 if (!is_end_of_line[(unsigned char) *input_line_pointer]
1727 && *input_line_pointer != '*'
1728 && *input_line_pointer != '!')
1729 as_warn (_("start address not supported"));
1733 /* Handle the .err pseudo-op. */
1736 s_err (int ignore ATTRIBUTE_UNUSED)
1738 as_bad (_(".err encountered"));
1739 demand_empty_rest_of_line ();
1742 /* Handle the .error and .warning pseudo-ops. */
1748 /* The purpose for the conditional assignment is not to
1749 internationalize the directive itself, but that we need a
1750 self-contained message, one that can be passed like the
1751 demand_copy_C_string return value, and with no assumption on the
1752 location of the name of the directive within the message. */
1754 = (err ? _(".error directive invoked in source file")
1755 : _(".warning directive invoked in source file"));
1757 if (!is_it_end_of_statement ())
1759 if (*input_line_pointer != '\"')
1761 as_bad (_("%s argument must be a string"),
1762 err ? ".error" : ".warning");
1763 ignore_rest_of_line ();
1767 msg = demand_copy_C_string (&len);
1775 as_warn ("%s", msg);
1776 demand_empty_rest_of_line ();
1779 /* Handle the MRI fail pseudo-op. */
1782 s_fail (int ignore ATTRIBUTE_UNUSED)
1789 stop = mri_comment_field (&stopc);
1791 temp = get_absolute_expression ();
1793 as_warn (_(".fail %ld encountered"), (long) temp);
1795 as_bad (_(".fail %ld encountered"), (long) temp);
1797 demand_empty_rest_of_line ();
1800 mri_comment_end (stop, stopc);
1804 s_fill (int ignore ATTRIBUTE_UNUSED)
1806 expressionS rep_exp;
1808 register long fill = 0;
1811 #ifdef md_flush_pending_output
1812 md_flush_pending_output ();
1815 get_known_segmented_expression (&rep_exp);
1816 if (*input_line_pointer == ',')
1818 input_line_pointer++;
1819 size = get_absolute_expression ();
1820 if (*input_line_pointer == ',')
1822 input_line_pointer++;
1823 fill = get_absolute_expression ();
1827 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1828 #define BSD_FILL_SIZE_CROCK_8 (8)
1829 if (size > BSD_FILL_SIZE_CROCK_8)
1831 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8);
1832 size = BSD_FILL_SIZE_CROCK_8;
1836 as_warn (_("size negative; .fill ignored"));
1839 else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
1841 if (rep_exp.X_add_number < 0)
1842 as_warn (_("repeat < 0; .fill ignored"));
1846 if (size && !need_pass_2)
1848 if (rep_exp.X_op == O_constant)
1850 p = frag_var (rs_fill, (int) size, (int) size,
1851 (relax_substateT) 0, (symbolS *) 0,
1852 (offsetT) rep_exp.X_add_number,
1857 /* We don't have a constant repeat count, so we can't use
1858 rs_fill. We can get the same results out of rs_space,
1859 but its argument is in bytes, so we must multiply the
1860 repeat count by size. */
1863 rep_sym = make_expr_symbol (&rep_exp);
1866 expressionS size_exp;
1867 size_exp.X_op = O_constant;
1868 size_exp.X_add_number = size;
1870 rep_exp.X_op = O_multiply;
1871 rep_exp.X_add_symbol = rep_sym;
1872 rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
1873 rep_exp.X_add_number = 0;
1874 rep_sym = make_expr_symbol (&rep_exp);
1877 p = frag_var (rs_space, (int) size, (int) size,
1878 (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
1881 memset (p, 0, (unsigned int) size);
1883 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1884 flavoured AS. The following bizarre behaviour is to be
1885 compatible with above. I guess they tried to take up to 8
1886 bytes from a 4-byte expression and they forgot to sign
1888 #define BSD_FILL_SIZE_CROCK_4 (4)
1889 md_number_to_chars (p, (valueT) fill,
1890 (size > BSD_FILL_SIZE_CROCK_4
1891 ? BSD_FILL_SIZE_CROCK_4
1893 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1894 but emits no error message because it seems a legal thing to do.
1895 It is a degenerate case of .fill but could be emitted by a
1898 demand_empty_rest_of_line ();
1902 s_globl (int ignore ATTRIBUTE_UNUSED)
1911 stop = mri_comment_field (&stopc);
1915 name = input_line_pointer;
1916 c = get_symbol_end ();
1917 symbolP = symbol_find_or_make (name);
1918 S_SET_EXTERNAL (symbolP);
1920 *input_line_pointer = c;
1922 c = *input_line_pointer;
1925 input_line_pointer++;
1927 if (is_end_of_line[(unsigned char) *input_line_pointer])
1933 demand_empty_rest_of_line ();
1936 mri_comment_end (stop, stopc);
1939 /* Handle the MRI IRP and IRPC pseudo-ops. */
1950 as_where (&file, &line);
1953 eol = find_end_of_line (input_line_pointer, 0);
1954 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
1955 input_line_pointer = eol;
1959 err = expand_irp (irpc, 0, &s, &out, get_line_sb);
1961 as_bad_where (file, line, "%s", err);
1965 input_scrub_include_sb (&out, input_line_pointer, 1);
1967 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1970 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
1971 the section to only be linked once. However, this is not supported
1972 by most object file formats. This takes an optional argument,
1973 which is what to do about duplicates. */
1976 s_linkonce (int ignore ATTRIBUTE_UNUSED)
1978 enum linkonce_type type;
1982 type = LINKONCE_DISCARD;
1984 if (!is_end_of_line[(unsigned char) *input_line_pointer])
1989 s = input_line_pointer;
1990 c = get_symbol_end ();
1991 if (strcasecmp (s, "discard") == 0)
1992 type = LINKONCE_DISCARD;
1993 else if (strcasecmp (s, "one_only") == 0)
1994 type = LINKONCE_ONE_ONLY;
1995 else if (strcasecmp (s, "same_size") == 0)
1996 type = LINKONCE_SAME_SIZE;
1997 else if (strcasecmp (s, "same_contents") == 0)
1998 type = LINKONCE_SAME_CONTENTS;
2000 as_warn (_("unrecognized .linkonce type `%s'"), s);
2002 *input_line_pointer = c;
2005 #ifdef obj_handle_link_once
2006 obj_handle_link_once (type);
2007 #else /* ! defined (obj_handle_link_once) */
2011 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
2012 as_warn (_(".linkonce is not supported for this object file format"));
2014 flags = bfd_get_section_flags (stdoutput, now_seg);
2015 flags |= SEC_LINK_ONCE;
2020 case LINKONCE_DISCARD:
2021 flags |= SEC_LINK_DUPLICATES_DISCARD;
2023 case LINKONCE_ONE_ONLY:
2024 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
2026 case LINKONCE_SAME_SIZE:
2027 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
2029 case LINKONCE_SAME_CONTENTS:
2030 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
2033 if (!bfd_set_section_flags (stdoutput, now_seg, flags))
2034 as_bad (_("bfd_set_section_flags: %s"),
2035 bfd_errmsg (bfd_get_error ()));
2037 #endif /* ! defined (obj_handle_link_once) */
2039 demand_empty_rest_of_line ();
2043 bss_alloc (symbolS *symbolP, addressT size, int align)
2046 segT current_seg = now_seg;
2047 subsegT current_subseg = now_subseg;
2048 segT bss_seg = bss_section;
2050 #if defined (TC_MIPS) || defined (TC_ALPHA)
2051 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
2052 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
2054 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2055 if (size <= bfd_get_gp_size (stdoutput))
2057 bss_seg = subseg_new (".sbss", 1);
2058 seg_info (bss_seg)->bss = 1;
2059 if (!bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
2060 as_warn (_("error setting flags for \".sbss\": %s"),
2061 bfd_errmsg (bfd_get_error ()));
2065 subseg_set (bss_seg, 1);
2069 record_alignment (bss_seg, align);
2070 frag_align (align, 0, 0);
2073 /* Detach from old frag. */
2074 if (S_GET_SEGMENT (symbolP) == bss_seg)
2075 symbol_get_frag (symbolP)->fr_symbol = NULL;
2077 symbol_set_frag (symbolP, frag_now);
2078 pfrag = frag_var (rs_org, 1, 1, 0, symbolP, size, NULL);
2082 S_SET_SIZE (symbolP, size);
2084 S_SET_SEGMENT (symbolP, bss_seg);
2087 /* The symbol may already have been created with a preceding
2088 ".globl" directive -- be careful not to step on storage class
2089 in that case. Otherwise, set it to static. */
2090 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
2091 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2092 #endif /* OBJ_COFF */
2094 subseg_set (current_seg, current_subseg);
2098 parse_align (int align_bytes)
2104 if (*input_line_pointer != ',')
2107 as_bad (_("expected alignment after size"));
2108 ignore_rest_of_line ();
2112 input_line_pointer++;
2115 align = get_absolute_expr (&exp);
2116 if (exp.X_op == O_absent)
2119 if (!exp.X_unsigned)
2121 as_warn (_("alignment negative; 0 assumed"));
2125 if (align_bytes && align != 0)
2127 /* convert to a power of 2 alignment */
2128 unsigned int alignp2 = 0;
2129 while ((align & 1) == 0)
2130 align >>= 1, ++alignp2;
2133 as_bad (_("alignment not a power of 2"));
2134 ignore_rest_of_line ();
2142 /* Called from s_comm_internal after symbol name and size have been
2143 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2144 1 if this was a ".bss" directive which has a 3rd argument
2145 (alignment as a power of 2), or 2 if this was a ".bss" directive
2146 with alignment in bytes. */
2149 s_lcomm_internal (int needs_align, symbolS *symbolP, addressT size)
2155 align = parse_align (needs_align - 1);
2156 if (align == (addressT) -1)
2160 /* Assume some objects may require alignment on some systems. */
2161 TC_IMPLICIT_LCOMM_ALIGNMENT (size, align);
2163 bss_alloc (symbolP, size, align);
2168 s_lcomm (int needs_align)
2170 s_comm_internal (needs_align, s_lcomm_internal);
2174 s_lcomm_bytes (int needs_align)
2176 s_comm_internal (needs_align * 2, s_lcomm_internal);
2180 s_lsym (int ignore ATTRIBUTE_UNUSED)
2182 register char *name;
2186 register symbolS *symbolP;
2188 /* We permit ANY defined expression: BSD4.2 demands constants. */
2189 name = input_line_pointer;
2190 c = get_symbol_end ();
2191 p = input_line_pointer;
2196 as_bad (_("expected symbol name"));
2197 ignore_rest_of_line ();
2203 if (*input_line_pointer != ',')
2206 as_bad (_("expected comma after \"%s\""), name);
2208 ignore_rest_of_line ();
2212 input_line_pointer++;
2215 if (exp.X_op != O_constant
2216 && exp.X_op != O_register)
2218 as_bad (_("bad expression"));
2219 ignore_rest_of_line ();
2224 symbolP = symbol_find_or_make (name);
2226 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
2227 symbolP->sy_desc == 0) out of this test because coff doesn't have
2228 those fields, and I can't see when they'd ever be tripped. I
2229 don't think I understand why they were here so I may have
2230 introduced a bug. As recently as 1.37 didn't have this test
2231 anyway. xoxorich. */
2233 if (S_GET_SEGMENT (symbolP) == undefined_section
2234 && S_GET_VALUE (symbolP) == 0)
2236 /* The name might be an undefined .global symbol; be sure to
2237 keep the "external" bit. */
2238 S_SET_SEGMENT (symbolP,
2239 (exp.X_op == O_constant
2242 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2246 as_bad (_("symbol `%s' is already defined"), name);
2250 demand_empty_rest_of_line ();
2253 /* Read a line into an sb. Returns the character that ended the line
2254 or zero if there are no more lines. */
2257 get_line_sb (sb *line)
2261 if (input_line_pointer[-1] == '\n')
2262 bump_line_counters ();
2264 if (input_line_pointer >= buffer_limit)
2266 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2267 if (buffer_limit == 0)
2271 eol = find_end_of_line (input_line_pointer, flag_m68k_mri);
2272 sb_add_buffer (line, input_line_pointer, eol - input_line_pointer);
2273 input_line_pointer = eol;
2275 /* Don't skip multiple end-of-line characters, because that breaks support
2276 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2277 characters but isn't. Instead just skip one end of line character and
2278 return the character skipped so that the caller can re-insert it if
2280 return *input_line_pointer++;
2283 /* Define a macro. This is an interface to macro.c. */
2286 s_macro (int ignore ATTRIBUTE_UNUSED)
2294 as_where (&file, &line);
2297 eol = find_end_of_line (input_line_pointer, 0);
2298 sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
2299 input_line_pointer = eol;
2301 if (line_label != NULL)
2306 sb_add_string (&label, S_GET_NAME (line_label));
2307 err = define_macro (0, &s, &label, get_line_sb, file, line, &name);
2311 err = define_macro (0, &s, NULL, get_line_sb, file, line, &name);
2313 as_bad_where (file, line, err, name);
2316 if (line_label != NULL)
2318 S_SET_SEGMENT (line_label, absolute_section);
2319 S_SET_VALUE (line_label, 0);
2320 symbol_set_frag (line_label, &zero_address_frag);
2323 if (((NO_PSEUDO_DOT || flag_m68k_mri)
2324 && hash_find (po_hash, name) != NULL)
2327 && hash_find (po_hash, name + 1) != NULL))
2328 as_warn_where (file,
2330 _("attempt to redefine pseudo-op `%s' ignored"),
2337 /* Handle the .mexit pseudo-op, which immediately exits a macro
2341 s_mexit (int ignore ATTRIBUTE_UNUSED)
2343 cond_exit_macro (macro_nest);
2344 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2347 /* Switch in and out of MRI mode. */
2350 s_mri (int ignore ATTRIBUTE_UNUSED)
2354 on = get_absolute_expression ();
2355 old_flag = flag_mri;
2373 /* Operator precedence changes in m68k MRI mode, so we need to
2374 update the operator rankings. */
2375 expr_set_precedence ();
2377 #ifdef MRI_MODE_CHANGE
2379 MRI_MODE_CHANGE (on);
2382 demand_empty_rest_of_line ();
2385 /* Handle changing the location counter. */
2388 do_org (segT segment, expressionS *exp, int fill)
2390 if (segment != now_seg && segment != absolute_section)
2391 as_bad (_("invalid segment \"%s\""), segment_name (segment));
2393 if (now_seg == absolute_section)
2396 as_warn (_("ignoring fill value in absolute section"));
2397 if (exp->X_op != O_constant)
2399 as_bad (_("only constant offsets supported in absolute section"));
2400 exp->X_add_number = 0;
2402 abs_section_offset = exp->X_add_number;
2407 symbolS *sym = exp->X_add_symbol;
2408 offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
2410 if (exp->X_op != O_constant && exp->X_op != O_symbol)
2412 /* Handle complex expressions. */
2413 sym = make_expr_symbol (exp);
2417 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
2423 s_org (int ignore ATTRIBUTE_UNUSED)
2425 register segT segment;
2427 register long temp_fill;
2429 #ifdef md_flush_pending_output
2430 md_flush_pending_output ();
2433 /* The m68k MRI assembler has a different meaning for .org. It
2434 means to create an absolute section at a given address. We can't
2435 support that--use a linker script instead. */
2438 as_bad (_("MRI style ORG pseudo-op not supported"));
2439 ignore_rest_of_line ();
2443 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2444 thing as a sub-segment-relative origin. Any absolute origin is
2445 given a warning, then assumed to be segment-relative. Any
2446 segmented origin expression ("foo+42") had better be in the right
2447 segment or the .org is ignored.
2449 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2450 we never know sub-segment sizes when we are reading code. BSD
2451 will crash trying to emit negative numbers of filler bytes in
2452 certain .orgs. We don't crash, but see as-write for that code.
2454 Don't make frag if need_pass_2==1. */
2455 segment = get_known_segmented_expression (&exp);
2456 if (*input_line_pointer == ',')
2458 input_line_pointer++;
2459 temp_fill = get_absolute_expression ();
2465 do_org (segment, &exp, temp_fill);
2467 demand_empty_rest_of_line ();
2470 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2471 called by the obj-format routine which handles section changing
2472 when in MRI mode. It will create a new section, and return it. It
2473 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2474 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2477 s_mri_sect (char *type ATTRIBUTE_UNUSED)
2487 name = input_line_pointer;
2488 if (!ISDIGIT (*name))
2489 c = get_symbol_end ();
2494 ++input_line_pointer;
2496 while (ISDIGIT (*input_line_pointer));
2498 c = *input_line_pointer;
2499 *input_line_pointer = '\0';
2502 name = xstrdup (name);
2504 *input_line_pointer = c;
2506 seg = subseg_new (name, 0);
2508 if (*input_line_pointer == ',')
2512 ++input_line_pointer;
2513 align = get_absolute_expression ();
2514 record_alignment (seg, align);
2518 if (*input_line_pointer == ',')
2520 c = *++input_line_pointer;
2522 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2525 as_bad (_("unrecognized section type"));
2526 ++input_line_pointer;
2531 flags = SEC_NO_FLAGS;
2533 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2534 else if (*type == 'D' || *type == 'M')
2535 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2536 else if (*type == 'R')
2537 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2538 if (flags != SEC_NO_FLAGS)
2540 if (!bfd_set_section_flags (stdoutput, seg, flags))
2541 as_warn (_("error setting flags for \"%s\": %s"),
2542 bfd_section_name (stdoutput, seg),
2543 bfd_errmsg (bfd_get_error ()));
2548 /* Ignore the HP type. */
2549 if (*input_line_pointer == ',')
2550 input_line_pointer += 2;
2552 demand_empty_rest_of_line ();
2554 #else /* ! TC_M68K */
2563 name = input_line_pointer;
2564 c = get_symbol_end ();
2566 name = xstrdup (name);
2568 *input_line_pointer = c;
2570 seg = subseg_new (name, 0);
2572 if (*input_line_pointer != ',')
2578 ++input_line_pointer;
2580 sectype = input_line_pointer;
2581 c = get_symbol_end ();
2582 if (*sectype == '\0')
2584 else if (strcasecmp (sectype, "text") == 0)
2586 else if (strcasecmp (sectype, "data") == 0)
2588 else if (strcasecmp (sectype, "romdata") == 0)
2591 as_warn (_("unrecognized section type `%s'"), sectype);
2592 *input_line_pointer = c;
2595 if (*input_line_pointer == ',')
2599 ++input_line_pointer;
2601 seccmd = input_line_pointer;
2602 c = get_symbol_end ();
2603 if (strcasecmp (seccmd, "absolute") == 0)
2605 as_bad (_("absolute sections are not supported"));
2606 *input_line_pointer = c;
2607 ignore_rest_of_line ();
2610 else if (strcasecmp (seccmd, "align") == 0)
2614 *input_line_pointer = c;
2615 align = get_absolute_expression ();
2616 record_alignment (seg, align);
2620 as_warn (_("unrecognized section command `%s'"), seccmd);
2621 *input_line_pointer = c;
2625 demand_empty_rest_of_line ();
2627 #else /* ! TC_I960 */
2628 /* The MRI assembler seems to use different forms of .sect for
2629 different targets. */
2630 as_bad ("MRI mode not supported for this target");
2631 ignore_rest_of_line ();
2632 #endif /* ! TC_I960 */
2633 #endif /* ! TC_M68K */
2636 /* Handle the .print pseudo-op. */
2639 s_print (int ignore ATTRIBUTE_UNUSED)
2644 s = demand_copy_C_string (&len);
2647 demand_empty_rest_of_line ();
2650 /* Handle the .purgem pseudo-op. */
2653 s_purgem (int ignore ATTRIBUTE_UNUSED)
2655 if (is_it_end_of_statement ())
2657 demand_empty_rest_of_line ();
2667 name = input_line_pointer;
2668 c = get_symbol_end ();
2669 delete_macro (name);
2670 *input_line_pointer = c;
2673 while (*input_line_pointer++ == ',');
2675 --input_line_pointer;
2676 demand_empty_rest_of_line ();
2679 /* Handle the .endm/.endr pseudo-ops. */
2682 s_bad_end (int endr)
2684 as_warn (_(".end%c encountered without preceeding %s"),
2686 endr ? ".rept, .irp, or .irpc" : ".macro");
2687 demand_empty_rest_of_line ();
2690 /* Handle the .rept pseudo-op. */
2693 s_rept (int ignore ATTRIBUTE_UNUSED)
2697 count = get_absolute_expression ();
2699 do_repeat (count, "REPT", "ENDR");
2702 /* This function provides a generic repeat block implementation. It allows
2703 different directives to be used as the start/end keys. */
2706 do_repeat (int count, const char *start, const char *end)
2712 if (!buffer_and_nest (start, end, &one, get_line_sb))
2714 as_bad (_("%s without %s"), start, end);
2720 sb_add_sb (&many, &one);
2724 input_scrub_include_sb (&many, input_line_pointer, 1);
2726 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2729 /* Skip to end of current repeat loop; EXTRA indicates how many additional
2730 input buffers to skip. Assumes that conditionals preceding the loop end
2731 are properly nested.
2733 This function makes it easier to implement a premature "break" out of the
2734 loop. The EXTRA arg accounts for other buffers we might have inserted,
2735 such as line substitutions. */
2738 end_repeat (int extra)
2740 cond_exit_macro (macro_nest);
2741 while (extra-- >= 0)
2742 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2746 assign_symbol (char *name, int no_reassign)
2750 if (name[0] == '.' && name[1] == '\0')
2752 /* Turn '. = mumble' into a .org mumble. */
2756 segment = get_known_segmented_expression (&exp);
2759 do_org (segment, &exp, 0);
2764 if ((symbolP = symbol_find (name)) == NULL
2765 && (symbolP = md_undefined_symbol (name)) == NULL)
2767 symbolP = symbol_find_or_make (name);
2769 /* When doing symbol listings, play games with dummy fragments living
2770 outside the normal fragment chain to record the file and line info
2772 if (listing & LISTING_SYMBOLS)
2774 extern struct list_info_struct *listing_tail;
2775 fragS *dummy_frag = (fragS *) xcalloc (1, sizeof (fragS));
2776 dummy_frag->line = listing_tail;
2777 dummy_frag->fr_symbol = symbolP;
2778 symbol_set_frag (symbolP, dummy_frag);
2782 /* "set" symbols are local unless otherwise specified. */
2783 SF_SET_LOCAL (symbolP);
2787 /* Permit register names to be redefined. */
2789 && S_IS_DEFINED (symbolP)
2790 && S_GET_SEGMENT (symbolP) != reg_section)
2791 as_bad (_("symbol `%s' is already defined"), name);
2793 pseudo_set (symbolP);
2796 /* Handle the .equ, .equiv and .set directives. If EQUIV is 1, then
2797 this is .equiv, and it is an error if the symbol is already
2807 /* Especial apologies for the random logic:
2808 this just grew, and could be parsed much more simply!
2810 name = input_line_pointer;
2811 delim = get_symbol_end ();
2812 end_name = input_line_pointer;
2815 if (name == end_name)
2817 as_bad (_("expected symbol name"));
2818 ignore_rest_of_line ();
2824 if (*input_line_pointer != ',')
2827 as_bad (_("expected comma after \"%s\""), name);
2829 ignore_rest_of_line ();
2833 input_line_pointer++;
2836 assign_symbol (name, equiv);
2839 demand_empty_rest_of_line ();
2852 #ifdef md_flush_pending_output
2853 md_flush_pending_output ();
2857 stop = mri_comment_field (&stopc);
2859 /* In m68k MRI mode, we need to align to a word boundary, unless
2861 if (flag_m68k_mri && mult > 1)
2863 if (now_seg == absolute_section)
2865 abs_section_offset += abs_section_offset & 1;
2866 if (line_label != NULL)
2867 S_SET_VALUE (line_label, abs_section_offset);
2869 else if (mri_common_symbol != NULL)
2873 val = S_GET_VALUE (mri_common_symbol);
2876 S_SET_VALUE (mri_common_symbol, val + 1);
2877 if (line_label != NULL)
2879 expressionS *symexp;
2881 symexp = symbol_get_value_expression (line_label);
2882 know (symexp->X_op == O_symbol);
2883 know (symexp->X_add_symbol == mri_common_symbol);
2884 symexp->X_add_number += 1;
2890 do_align (1, (char *) NULL, 0, 0);
2891 if (line_label != NULL)
2893 symbol_set_frag (line_label, frag_now);
2894 S_SET_VALUE (line_label, frag_now_fix ());
2904 if (*input_line_pointer == ',')
2906 ++input_line_pointer;
2911 val.X_op = O_constant;
2912 val.X_add_number = 0;
2915 if (val.X_op != O_constant
2916 || val.X_add_number < - 0x80
2917 || val.X_add_number > 0xff
2918 || (mult != 0 && mult != 1 && val.X_add_number != 0))
2920 if (exp.X_op != O_constant)
2921 as_bad (_("unsupported variable size or fill value"));
2928 bytes = mult * exp.X_add_number;
2929 for (i = 0; i < exp.X_add_number; i++)
2930 emit_expr (&val, mult);
2935 if (exp.X_op == O_constant)
2939 repeat = exp.X_add_number;
2946 as_warn (_(".space repeat count is zero, ignored"));
2947 else if (repeat < 0)
2948 as_warn (_(".space repeat count is negative, ignored"));
2952 /* If we are in the absolute section, just bump the offset. */
2953 if (now_seg == absolute_section)
2955 abs_section_offset += repeat;
2959 /* If we are secretly in an MRI common section, then
2960 creating space just increases the size of the common
2962 if (mri_common_symbol != NULL)
2964 S_SET_VALUE (mri_common_symbol,
2965 S_GET_VALUE (mri_common_symbol) + repeat);
2970 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
2971 (offsetT) repeat, (char *) 0);
2975 if (now_seg == absolute_section)
2977 as_bad (_("space allocation too complex in absolute section"));
2978 subseg_set (text_section, 0);
2981 if (mri_common_symbol != NULL)
2983 as_bad (_("space allocation too complex in common section"));
2984 mri_common_symbol = NULL;
2988 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
2989 make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
2993 *p = val.X_add_number;
2998 /* In MRI mode, after an odd number of bytes, we must align to an
2999 even word boundary, unless the next instruction is a dc.b, ds.b
3001 if (flag_mri && (bytes & 1) != 0)
3002 mri_pending_align = 1;
3004 demand_empty_rest_of_line ();
3007 mri_comment_end (stop, stopc);
3010 /* This is like s_space, but the value is a floating point number with
3011 the given precision. This is for the MRI dcb.s pseudo-op and
3015 s_float_space (int float_type)
3019 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3024 stop = mri_comment_field (&stopc);
3026 count = get_absolute_expression ();
3029 if (*input_line_pointer != ',')
3031 as_bad (_("missing value"));
3032 ignore_rest_of_line ();
3034 mri_comment_end (stop, stopc);
3038 ++input_line_pointer;
3042 /* Skip any 0{letter} that may be present. Don't even check if the
3043 * letter is legal. */
3044 if (input_line_pointer[0] == '0'
3045 && ISALPHA (input_line_pointer[1]))
3046 input_line_pointer += 2;
3048 /* Accept :xxxx, where the x's are hex digits, for a floating point
3049 with the exact digits specified. */
3050 if (input_line_pointer[0] == ':')
3052 flen = hex_float (float_type, temp);
3055 ignore_rest_of_line ();
3057 mri_comment_end (stop, stopc);
3065 err = md_atof (float_type, temp, &flen);
3066 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
3070 as_bad (_("bad floating literal: %s"), err);
3071 ignore_rest_of_line ();
3073 mri_comment_end (stop, stopc);
3078 while (--count >= 0)
3082 p = frag_more (flen);
3083 memcpy (p, temp, (unsigned int) flen);
3086 demand_empty_rest_of_line ();
3089 mri_comment_end (stop, stopc);
3092 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3095 s_struct (int ignore ATTRIBUTE_UNUSED)
3101 stop = mri_comment_field (&stopc);
3102 abs_section_offset = get_absolute_expression ();
3103 subseg_set (absolute_section, 0);
3104 demand_empty_rest_of_line ();
3106 mri_comment_end (stop, stopc);
3110 s_text (int ignore ATTRIBUTE_UNUSED)
3114 temp = get_absolute_expression ();
3115 subseg_set (text_section, (subsegT) temp);
3116 demand_empty_rest_of_line ();
3118 const_flag &= ~IN_DEFAULT_SECTION;
3123 /* Verify that we are at the end of a line. If not, issue an error and
3127 demand_empty_rest_of_line (void)
3130 if (is_end_of_line[(unsigned char) *input_line_pointer])
3131 input_line_pointer++;
3134 if (ISPRINT (*input_line_pointer))
3135 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3136 *input_line_pointer);
3138 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3139 *input_line_pointer);
3140 ignore_rest_of_line ();
3143 /* Return pointing just after end-of-line. */
3144 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3147 /* Silently advance to the end of line. Use this after already having
3148 issued an error about something bad. */
3151 ignore_rest_of_line (void)
3153 while (input_line_pointer < buffer_limit
3154 && !is_end_of_line[(unsigned char) *input_line_pointer])
3155 input_line_pointer++;
3157 input_line_pointer++;
3159 /* Return pointing just after end-of-line. */
3160 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3163 /* Sets frag for given symbol to zero_address_frag, except when the
3164 symbol frag is already set to a dummy listing frag. */
3167 set_zero_frag (symbolS *symbolP)
3169 if (symbol_get_frag (symbolP)->fr_type != rs_dummy)
3170 symbol_set_frag (symbolP, &zero_address_frag);
3173 /* In: Pointer to a symbol.
3174 Input_line_pointer->expression.
3176 Out: Input_line_pointer->just after any whitespace after expression.
3177 Tried to set symbol to value of expression.
3178 Will change symbols type, value, and frag; */
3181 pseudo_set (symbolS *symbolP)
3186 know (symbolP); /* NULL pointer is logic error. */
3188 (void) expression (&exp);
3190 if (exp.X_op == O_illegal)
3191 as_bad (_("illegal expression"));
3192 else if (exp.X_op == O_absent)
3193 as_bad (_("missing expression"));
3194 else if (exp.X_op == O_big)
3196 if (exp.X_add_number > 0)
3197 as_bad (_("bignum invalid"));
3199 as_bad (_("floating point number invalid"));
3201 else if (exp.X_op == O_subtract
3202 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
3203 && (symbol_get_frag (exp.X_add_symbol)
3204 == symbol_get_frag (exp.X_op_symbol)))
3206 exp.X_op = O_constant;
3207 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
3208 - S_GET_VALUE (exp.X_op_symbol));
3211 if (symbol_section_p (symbolP))
3213 as_bad ("attempt to set value of section symbol");
3222 exp.X_add_number = 0;
3225 S_SET_SEGMENT (symbolP, absolute_section);
3226 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3227 set_zero_frag (symbolP);
3231 S_SET_SEGMENT (symbolP, reg_section);
3232 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3233 set_zero_frag (symbolP);
3237 seg = S_GET_SEGMENT (exp.X_add_symbol);
3238 /* For x=undef+const, create an expression symbol.
3239 For x=x+const, just update x except when x is an undefined symbol
3240 For x=defined+const, evaluate x. */
3241 if (symbolP == exp.X_add_symbol
3242 && (seg != undefined_section
3243 || !symbol_constant_p (symbolP)))
3245 *symbol_X_add_number (symbolP) += exp.X_add_number;
3248 else if (seg != undefined_section)
3250 symbolS *s = exp.X_add_symbol;
3252 if (S_IS_COMMON (s))
3253 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3254 S_GET_NAME (symbolP), S_GET_NAME (s));
3256 S_SET_SEGMENT (symbolP, seg);
3257 S_SET_VALUE (symbolP, exp.X_add_number + S_GET_VALUE (s));
3258 symbol_set_frag (symbolP, symbol_get_frag (s));
3259 copy_symbol_attributes (symbolP, s);
3265 /* The value is some complex expression. */
3266 S_SET_SEGMENT (symbolP, expr_section);
3267 symbol_set_value_expression (symbolP, &exp);
3268 set_zero_frag (symbolP);
3275 CONStruct more frag of .bytes, or .words etc.
3276 Should need_pass_2 be 1 then emit no frag(s).
3277 This understands EXPRESSIONS.
3281 This has a split personality. We use expression() to read the
3282 value. We can detect if the value won't fit in a byte or word.
3283 But we can't detect if expression() discarded significant digits
3284 in the case of a long. Not worth the crocks required to fix it. */
3286 /* Select a parser for cons expressions. */
3288 /* Some targets need to parse the expression in various fancy ways.
3289 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3290 (for example, the HPPA does this). Otherwise, you can define
3291 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3292 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3293 are defined, which is the normal case, then only simple expressions
3298 parse_mri_cons (expressionS *exp, unsigned int nbytes);
3301 #ifndef TC_PARSE_CONS_EXPRESSION
3302 #ifdef BITFIELD_CONS_EXPRESSIONS
3303 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3305 parse_bitfield_cons (expressionS *exp, unsigned int nbytes);
3307 #ifdef REPEAT_CONS_EXPRESSIONS
3308 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3310 parse_repeat_cons (expressionS *exp, unsigned int nbytes);
3313 /* If we haven't gotten one yet, just call expression. */
3314 #ifndef TC_PARSE_CONS_EXPRESSION
3315 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3320 do_parse_cons_expression (expressionS *exp,
3321 int nbytes ATTRIBUTE_UNUSED)
3323 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3327 /* Worker to do .byte etc statements.
3328 Clobbers input_line_pointer and checks end-of-line. */
3331 cons_worker (register int nbytes, /* 1=.byte, 2=.word, 4=.long. */
3339 #ifdef md_flush_pending_output
3340 md_flush_pending_output ();
3344 stop = mri_comment_field (&stopc);
3346 if (is_it_end_of_statement ())
3348 demand_empty_rest_of_line ();
3350 mri_comment_end (stop, stopc);
3354 #ifdef TC_ADDRESS_BYTES
3356 nbytes = TC_ADDRESS_BYTES ();
3359 #ifdef md_cons_align
3360 md_cons_align (nbytes);
3368 parse_mri_cons (&exp, (unsigned int) nbytes);
3371 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3375 if (exp.X_op == O_symbol)
3376 exp.X_op = O_symbol_rva;
3378 as_fatal (_("rva without symbol"));
3380 emit_expr (&exp, (unsigned int) nbytes);
3383 while (*input_line_pointer++ == ',');
3385 /* In MRI mode, after an odd number of bytes, we must align to an
3386 even word boundary, unless the next instruction is a dc.b, ds.b
3388 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3389 mri_pending_align = 1;
3391 input_line_pointer--; /* Put terminator back into stream. */
3393 demand_empty_rest_of_line ();
3396 mri_comment_end (stop, stopc);
3402 cons_worker (size, 0);
3408 cons_worker (size, 1);
3411 /* Put the contents of expression EXP into the object file using
3412 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3415 emit_expr (expressionS *exp, unsigned int nbytes)
3419 valueT extra_digit = 0;
3421 /* Don't do anything if we are going to make another pass. */
3425 dot_value = frag_now_fix ();
3429 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3430 appear as a four byte positive constant in the .line section,
3431 followed by a 2 byte 0xffff. Look for that case here. */
3433 static int dwarf_line = -1;
3435 if (strcmp (segment_name (now_seg), ".line") != 0)
3437 else if (dwarf_line >= 0
3439 && exp->X_op == O_constant
3440 && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
3441 listing_source_line ((unsigned int) dwarf_line);
3442 else if (nbytes == 4
3443 && exp->X_op == O_constant
3444 && exp->X_add_number >= 0)
3445 dwarf_line = exp->X_add_number;
3450 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3451 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3452 AT_sibling (0x12) followed by a four byte address of the sibling
3453 followed by a 2 byte AT_name (0x38) followed by the name of the
3454 file. We look for that case here. */
3456 static int dwarf_file = 0;
3458 if (strcmp (segment_name (now_seg), ".debug") != 0)
3460 else if (dwarf_file == 0
3462 && exp->X_op == O_constant
3463 && exp->X_add_number == 0x11)
3465 else if (dwarf_file == 1
3467 && exp->X_op == O_constant
3468 && exp->X_add_number == 0x12)
3470 else if (dwarf_file == 2
3473 else if (dwarf_file == 3
3475 && exp->X_op == O_constant
3476 && exp->X_add_number == 0x38)
3481 /* The variable dwarf_file_string tells stringer that the string
3482 may be the name of the source file. */
3483 if (dwarf_file == 4)
3484 dwarf_file_string = 1;
3486 dwarf_file_string = 0;
3491 if (check_eh_frame (exp, &nbytes))
3496 /* Allow `.word 0' in the absolute section. */
3497 if (now_seg == absolute_section)
3499 if (op != O_constant || exp->X_add_number != 0)
3500 as_bad (_("attempt to store value in absolute section"));
3501 abs_section_offset += nbytes;
3505 /* Handle a negative bignum. */
3507 && exp->X_add_number == 0
3508 && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
3509 && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
3512 unsigned long carry;
3514 exp = symbol_get_value_expression (exp->X_add_symbol);
3516 /* Negate the bignum: one's complement each digit and add 1. */
3518 for (i = 0; i < exp->X_add_number; i++)
3522 next = (((~(generic_bignum[i] & LITTLENUM_MASK))
3525 generic_bignum[i] = next & LITTLENUM_MASK;
3526 carry = next >> LITTLENUM_NUMBER_OF_BITS;
3529 /* We can ignore any carry out, because it will be handled by
3530 extra_digit if it is needed. */
3532 extra_digit = (valueT) -1;
3536 if (op == O_absent || op == O_illegal)
3538 as_warn (_("zero assumed for missing expression"));
3539 exp->X_add_number = 0;
3542 else if (op == O_big && exp->X_add_number <= 0)
3544 as_bad (_("floating point number invalid"));
3545 exp->X_add_number = 0;
3548 else if (op == O_register)
3550 as_warn (_("register value used as expression"));
3554 p = frag_more ((int) nbytes);
3556 #ifndef WORKING_DOT_WORD
3557 /* If we have the difference of two symbols in a word, save it on
3558 the broken_words list. See the code in write.c. */
3559 if (op == O_subtract && nbytes == 2)
3561 struct broken_word *x;
3563 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
3564 x->next_broken_word = broken_words;
3567 x->subseg = now_subseg;
3569 x->word_goes_here = p;
3571 x->add = exp->X_add_symbol;
3572 x->sub = exp->X_op_symbol;
3573 x->addnum = exp->X_add_number;
3581 /* If we have an integer, but the number of bytes is too large to
3582 pass to md_number_to_chars, handle it as a bignum. */
3583 if (op == O_constant && nbytes > sizeof (valueT))
3585 extra_digit = exp->X_unsigned ? 0 : -1;
3586 convert_to_bignum (exp);
3590 if (op == O_constant)
3592 register valueT get;
3593 register valueT use;
3594 register valueT mask;
3596 register valueT unmask;
3598 /* JF << of >= number of bits in the object is undefined. In
3599 particular SPARC (Sun 4) has problems. */
3600 if (nbytes >= sizeof (valueT))
3603 if (nbytes > sizeof (valueT))
3606 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3610 /* Don't store these bits. */
3611 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
3612 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3615 unmask = ~mask; /* Do store these bits. */
3618 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3619 mask = ~(unmask >> 1); /* Includes sign bit now. */
3622 get = exp->X_add_number;
3624 if ((get & mask) != 0
3625 && ((get & mask) != mask
3626 || (get & hibit) == 0))
3627 { /* Leading bits contain both 0s & 1s. */
3628 as_warn (_("value 0x%lx truncated to 0x%lx"),
3629 (unsigned long) get, (unsigned long) use);
3631 /* Put bytes in right order. */
3632 md_number_to_chars (p, use, (int) nbytes);
3634 else if (op == O_big)
3637 LITTLENUM_TYPE *nums;
3639 know (nbytes % CHARS_PER_LITTLENUM == 0);
3641 size = exp->X_add_number * CHARS_PER_LITTLENUM;
3644 as_warn (_("bignum truncated to %d bytes"), nbytes);
3648 if (target_big_endian)
3650 while (nbytes > size)
3652 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3653 nbytes -= CHARS_PER_LITTLENUM;
3654 p += CHARS_PER_LITTLENUM;
3657 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
3658 while (size >= CHARS_PER_LITTLENUM)
3661 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3662 size -= CHARS_PER_LITTLENUM;
3663 p += CHARS_PER_LITTLENUM;
3668 nums = generic_bignum;
3669 while (size >= CHARS_PER_LITTLENUM)
3671 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3673 size -= CHARS_PER_LITTLENUM;
3674 p += CHARS_PER_LITTLENUM;
3675 nbytes -= CHARS_PER_LITTLENUM;
3678 while (nbytes >= CHARS_PER_LITTLENUM)
3680 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3681 nbytes -= CHARS_PER_LITTLENUM;
3682 p += CHARS_PER_LITTLENUM;
3688 memset (p, 0, nbytes);
3690 /* Now we need to generate a fixS to record the symbol value. */
3692 #ifdef TC_CONS_FIX_NEW
3693 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
3696 bfd_reloc_code_real_type r;
3713 as_bad (_("unsupported BFD relocation size %u"), nbytes);
3717 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp,
3724 #ifdef BITFIELD_CONS_EXPRESSIONS
3726 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3727 w:x,y:z, where w and y are bitwidths and x and y are values. They
3728 then pack them all together. We do a little better in that we allow
3729 them in words, longs, etc. and we'll pack them in target byte order
3732 The rules are: pack least significant bit first, if a field doesn't
3733 entirely fit, put it in the next unit. Overflowing the bitfield is
3734 explicitly *not* even a warning. The bitwidth should be considered
3737 To use this function the tc-XXX.h file should define
3738 BITFIELD_CONS_EXPRESSIONS. */
3741 parse_bitfield_cons (exp, nbytes)
3743 unsigned int nbytes;
3745 unsigned int bits_available = BITS_PER_CHAR * nbytes;
3746 char *hold = input_line_pointer;
3748 (void) expression (exp);
3750 if (*input_line_pointer == ':')
3757 unsigned long width;
3759 if (*input_line_pointer != ':')
3761 input_line_pointer = hold;
3763 } /* Next piece is not a bitfield. */
3765 /* In the general case, we can't allow
3766 full expressions with symbol
3767 differences and such. The relocation
3768 entries for symbols not defined in this
3769 assembly would require arbitrary field
3770 widths, positions, and masks which most
3771 of our current object formats don't
3774 In the specific case where a symbol
3775 *is* defined in this assembly, we
3776 *could* build fixups and track it, but
3777 this could lead to confusion for the
3778 backends. I'm lazy. I'll take any
3779 SEG_ABSOLUTE. I think that means that
3780 you can use a previous .set or
3781 .equ type symbol. xoxorich. */
3783 if (exp->X_op == O_absent)
3785 as_warn (_("using a bit field width of zero"));
3786 exp->X_add_number = 0;
3787 exp->X_op = O_constant;
3788 } /* Implied zero width bitfield. */
3790 if (exp->X_op != O_constant)
3792 *input_line_pointer = '\0';
3793 as_bad (_("field width \"%s\" too complex for a bitfield"), hold);
3794 *input_line_pointer = ':';
3795 demand_empty_rest_of_line ();
3797 } /* Too complex. */
3799 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
3801 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
3802 width, nbytes, (BITS_PER_CHAR * nbytes));
3803 width = BITS_PER_CHAR * nbytes;
3806 if (width > bits_available)
3808 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
3809 input_line_pointer = hold;
3810 exp->X_add_number = value;
3815 hold = ++input_line_pointer;
3817 (void) expression (exp);
3818 if (exp->X_op != O_constant)
3820 char cache = *input_line_pointer;
3822 *input_line_pointer = '\0';
3823 as_bad (_("field value \"%s\" too complex for a bitfield"), hold);
3824 *input_line_pointer = cache;
3825 demand_empty_rest_of_line ();
3827 } /* Too complex. */
3829 value |= ((~(-1 << width) & exp->X_add_number)
3830 << ((BITS_PER_CHAR * nbytes) - bits_available));
3832 if ((bits_available -= width) == 0
3833 || is_it_end_of_statement ()
3834 || *input_line_pointer != ',')
3837 } /* All the bitfields we're gonna get. */
3839 hold = ++input_line_pointer;
3840 (void) expression (exp);
3843 exp->X_add_number = value;
3844 exp->X_op = O_constant;
3845 exp->X_unsigned = 1;
3849 #endif /* BITFIELD_CONS_EXPRESSIONS */
3851 /* Handle an MRI style string expression. */
3855 parse_mri_cons (exp, nbytes)
3857 unsigned int nbytes;
3859 if (*input_line_pointer != '\''
3860 && (input_line_pointer[1] != '\''
3861 || (*input_line_pointer != 'A'
3862 && *input_line_pointer != 'E')))
3863 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3867 unsigned int result = 0;
3869 /* An MRI style string. Cut into as many bytes as will fit into
3870 a nbyte chunk, left justify if necessary, and separate with
3871 commas so we can try again later. */
3872 if (*input_line_pointer == 'A')
3873 ++input_line_pointer;
3874 else if (*input_line_pointer == 'E')
3876 as_bad (_("EBCDIC constants are not supported"));
3877 ++input_line_pointer;
3880 input_line_pointer++;
3881 for (scan = 0; scan < nbytes; scan++)
3883 if (*input_line_pointer == '\'')
3885 if (input_line_pointer[1] == '\'')
3887 input_line_pointer++;
3892 result = (result << 8) | (*input_line_pointer++);
3896 while (scan < nbytes)
3902 /* Create correct expression. */
3903 exp->X_op = O_constant;
3904 exp->X_add_number = result;
3906 /* Fake it so that we can read the next char too. */
3907 if (input_line_pointer[0] != '\'' ||
3908 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
3910 input_line_pointer -= 2;
3911 input_line_pointer[0] = ',';
3912 input_line_pointer[1] = '\'';
3915 input_line_pointer++;
3918 #endif /* TC_M68K */
3920 #ifdef REPEAT_CONS_EXPRESSIONS
3922 /* Parse a repeat expression for cons. This is used by the MIPS
3923 assembler. The format is NUMBER:COUNT; NUMBER appears in the
3924 object file COUNT times.
3926 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
3929 parse_repeat_cons (exp, nbytes)
3931 unsigned int nbytes;
3938 if (*input_line_pointer != ':')
3940 /* No repeat count. */
3944 ++input_line_pointer;
3945 expression (&count);
3946 if (count.X_op != O_constant
3947 || count.X_add_number <= 0)
3949 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
3953 /* The cons function is going to output this expression once. So we
3954 output it count - 1 times. */
3955 for (i = count.X_add_number - 1; i > 0; i--)
3956 emit_expr (exp, nbytes);
3959 #endif /* REPEAT_CONS_EXPRESSIONS */
3961 /* Parse a floating point number represented as a hex constant. This
3962 permits users to specify the exact bits they want in the floating
3966 hex_float (int float_type, char *bytes)
3998 as_bad (_("unknown floating type type '%c'"), float_type);
4002 /* It would be nice if we could go through expression to parse the
4003 hex constant, but if we get a bignum it's a pain to sort it into
4004 the buffer correctly. */
4006 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
4010 /* The MRI assembler accepts arbitrary underscores strewn about
4011 through the hex constant, so we ignore them as well. */
4012 if (*input_line_pointer == '_')
4014 ++input_line_pointer;
4020 as_warn (_("floating point constant too large"));
4023 d = hex_value (*input_line_pointer) << 4;
4024 ++input_line_pointer;
4025 while (*input_line_pointer == '_')
4026 ++input_line_pointer;
4027 if (hex_p (*input_line_pointer))
4029 d += hex_value (*input_line_pointer);
4030 ++input_line_pointer;
4032 if (target_big_endian)
4035 bytes[length - i - 1] = d;
4041 if (target_big_endian)
4042 memset (bytes + i, 0, length - i);
4044 memset (bytes, 0, length - i);
4052 CONStruct some more frag chars of .floats .ffloats etc.
4053 Makes 0 or more new frags.
4054 If need_pass_2 == 1, no frags are emitted.
4055 This understands only floating literals, not expressions. Sorry.
4057 A floating constant is defined by atof_generic(), except it is preceded
4058 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4059 reading, I decided to be incompatible. This always tries to give you
4060 rounded bits to the precision of the pseudo-op. Former AS did premature
4061 truncation, restored noisy bits instead of trailing 0s AND gave you
4062 a choice of 2 flavours of noise according to which of 2 floating-point
4063 scanners you directed AS to use.
4065 In: input_line_pointer->whitespace before, or '0' of flonum. */
4068 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4069 register int float_type /* 'f':.ffloat ... 'F':.float ... */)
4072 int length; /* Number of chars in an object. */
4073 register char *err; /* Error from scanning floating literal. */
4074 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
4076 if (is_it_end_of_statement ())
4078 demand_empty_rest_of_line ();
4082 #ifdef md_flush_pending_output
4083 md_flush_pending_output ();
4088 /* input_line_pointer->1st char of a flonum (we hope!). */
4091 /* Skip any 0{letter} that may be present. Don't even check if the
4092 letter is legal. Someone may invent a "z" format and this routine
4093 has no use for such information. Lusers beware: you get
4094 diagnostics if your input is ill-conditioned. */
4095 if (input_line_pointer[0] == '0'
4096 && ISALPHA (input_line_pointer[1]))
4097 input_line_pointer += 2;
4099 /* Accept :xxxx, where the x's are hex digits, for a floating
4100 point with the exact digits specified. */
4101 if (input_line_pointer[0] == ':')
4103 ++input_line_pointer;
4104 length = hex_float (float_type, temp);
4107 ignore_rest_of_line ();
4113 err = md_atof (float_type, temp, &length);
4114 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
4118 as_bad (_("bad floating literal: %s"), err);
4119 ignore_rest_of_line ();
4130 #ifdef REPEAT_CONS_EXPRESSIONS
4131 if (*input_line_pointer == ':')
4133 expressionS count_exp;
4135 ++input_line_pointer;
4136 expression (&count_exp);
4138 if (count_exp.X_op != O_constant
4139 || count_exp.X_add_number <= 0)
4140 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4142 count = count_exp.X_add_number;
4146 while (--count >= 0)
4148 p = frag_more (length);
4149 memcpy (p, temp, (unsigned int) length);
4154 while (*input_line_pointer++ == ',');
4156 /* Put terminator back into stream. */
4157 --input_line_pointer;
4158 demand_empty_rest_of_line ();
4161 /* Return the size of a LEB128 value. */
4164 sizeof_sleb128 (offsetT value)
4166 register int size = 0;
4167 register unsigned byte;
4171 byte = (value & 0x7f);
4172 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4173 Fortunately, we can structure things so that the extra work reduces
4174 to a noop on systems that do things "properly". */
4175 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4178 while (!(((value == 0) && ((byte & 0x40) == 0))
4179 || ((value == -1) && ((byte & 0x40) != 0))));
4185 sizeof_uleb128 (valueT value)
4187 register int size = 0;
4188 register unsigned byte;
4192 byte = (value & 0x7f);
4202 sizeof_leb128 (valueT value, int sign)
4205 return sizeof_sleb128 ((offsetT) value);
4207 return sizeof_uleb128 (value);
4210 /* Output a LEB128 value. */
4213 output_sleb128 (char *p, offsetT value)
4215 register char *orig = p;
4220 unsigned byte = (value & 0x7f);
4222 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4223 Fortunately, we can structure things so that the extra work reduces
4224 to a noop on systems that do things "properly". */
4225 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4227 more = !((((value == 0) && ((byte & 0x40) == 0))
4228 || ((value == -1) && ((byte & 0x40) != 0))));
4240 output_uleb128 (char *p, valueT value)
4246 unsigned byte = (value & 0x7f);
4249 /* More bytes to follow. */
4260 output_leb128 (char *p, valueT value, int sign)
4263 return output_sleb128 (p, (offsetT) value);
4265 return output_uleb128 (p, value);
4268 /* Do the same for bignums. We combine sizeof with output here in that
4269 we don't output for NULL values of P. It isn't really as critical as
4270 for "normal" values that this be streamlined. */
4273 output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
4280 /* Strip leading sign extensions off the bignum. */
4282 && bignum[size - 1] == LITTLENUM_MASK
4283 && bignum[size - 2] > LITTLENUM_MASK / 2)
4288 /* OR in the next part of the littlenum. */
4289 val |= (*bignum << loaded);
4290 loaded += LITTLENUM_NUMBER_OF_BITS;
4294 /* Add bytes until there are less than 7 bits left in VAL
4295 or until every non-sign bit has been written. */
4302 || val != ((byte & 0x40) == 0 ? 0 : ((valueT) 1 << loaded) - 1))
4309 while ((byte & 0x80) != 0 && loaded >= 7);
4313 /* Mop up any left-over bits (of which there will be less than 7). */
4314 if ((byte & 0x80) != 0)
4316 /* Sign-extend VAL. */
4317 if (val & (1 << (loaded - 1)))
4318 val |= ~0 << loaded;
4328 output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, int size)
4335 /* Strip leading zeros off the bignum. */
4336 /* XXX: Is this needed? */
4337 while (size > 0 && bignum[size - 1] == 0)
4342 if (loaded < 7 && size > 0)
4344 val |= (*bignum << loaded);
4345 loaded += 8 * CHARS_PER_LITTLENUM;
4354 if (size > 0 || val)
4361 while (byte & 0x80);
4367 output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, int size, int sign)
4370 return output_big_sleb128 (p, bignum, size);
4372 return output_big_uleb128 (p, bignum, size);
4375 /* Generate the appropriate fragments for a given expression to emit a
4379 emit_leb128_expr (expressionS *exp, int sign)
4381 operatorT op = exp->X_op;
4382 unsigned int nbytes;
4384 if (op == O_absent || op == O_illegal)
4386 as_warn (_("zero assumed for missing expression"));
4387 exp->X_add_number = 0;
4390 else if (op == O_big && exp->X_add_number <= 0)
4392 as_bad (_("floating point number invalid"));
4393 exp->X_add_number = 0;
4396 else if (op == O_register)
4398 as_warn (_("register value used as expression"));
4401 else if (op == O_constant
4403 && (exp->X_add_number < 0) != !exp->X_unsigned)
4405 /* We're outputting a signed leb128 and the sign of X_add_number
4406 doesn't reflect the sign of the original value. Convert EXP
4407 to a correctly-extended bignum instead. */
4408 convert_to_bignum (exp);
4412 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
4413 a signal that this is leb128 data. It shouldn't optimize this away. */
4414 nbytes = (unsigned int) -1;
4415 if (check_eh_frame (exp, &nbytes))
4418 /* Let the backend know that subsequent data may be byte aligned. */
4419 #ifdef md_cons_align
4423 if (op == O_constant)
4425 /* If we've got a constant, emit the thing directly right now. */
4427 valueT value = exp->X_add_number;
4431 size = sizeof_leb128 (value, sign);
4432 p = frag_more (size);
4433 output_leb128 (p, value, sign);
4435 else if (op == O_big)
4437 /* O_big is a different sort of constant. */
4442 size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
4443 p = frag_more (size);
4444 output_big_leb128 (p, generic_bignum, exp->X_add_number, sign);
4448 /* Otherwise, we have to create a variable sized fragment and
4449 resolve things later. */
4451 frag_var (rs_leb128, sizeof_uleb128 (~(valueT) 0), 0, sign,
4452 make_expr_symbol (exp), 0, (char *) NULL);
4456 /* Parse the .sleb128 and .uleb128 pseudos. */
4463 #ifdef md_flush_pending_output
4464 md_flush_pending_output ();
4470 emit_leb128_expr (&exp, sign);
4472 while (*input_line_pointer++ == ',');
4474 input_line_pointer--;
4475 demand_empty_rest_of_line ();
4478 /* We read 0 or more ',' separated, double-quoted strings.
4479 Caller should have checked need_pass_2 is FALSE because we don't
4483 stringer (/* Worker to do .ascii etc statements. */
4484 /* Checks end-of-line. */
4485 register int append_zero /* 0: don't append '\0', else 1. */)
4487 register unsigned int c;
4490 #ifdef md_flush_pending_output
4491 md_flush_pending_output ();
4494 /* The following awkward logic is to parse ZERO or more strings,
4495 comma separated. Recall a string expression includes spaces
4496 before the opening '\"' and spaces after the closing '\"'.
4497 We fake a leading ',' if there is (supposed to be)
4498 a 1st, expression. We keep demanding expressions for each ','. */
4499 if (is_it_end_of_statement ())
4501 c = 0; /* Skip loop. */
4502 ++input_line_pointer; /* Compensate for end of loop. */
4506 c = ','; /* Do loop. */
4508 /* If we have been switched into the abs_section then we
4509 will not have an obstack onto which we can hang strings. */
4510 if (now_seg == absolute_section)
4512 as_bad (_("strings must be placed into a section"));
4514 ignore_rest_of_line ();
4517 while (c == ',' || c == '<' || c == '"')
4520 switch (*input_line_pointer)
4523 ++input_line_pointer; /*->1st char of string. */
4524 start = input_line_pointer;
4525 while (is_a_char (c = next_char_of_string ()))
4527 FRAG_APPEND_1_CHAR (c);
4531 FRAG_APPEND_1_CHAR (0);
4533 know (input_line_pointer[-1] == '\"');
4537 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
4538 will emit .string with a filename in the .debug section
4539 after a sequence of constants. See the comment in
4540 emit_expr for the sequence. emit_expr will set
4541 dwarf_file_string to non-zero if this string might be a
4542 source file name. */
4543 if (strcmp (segment_name (now_seg), ".debug") != 0)
4544 dwarf_file_string = 0;
4545 else if (dwarf_file_string)
4547 c = input_line_pointer[-1];
4548 input_line_pointer[-1] = '\0';
4549 listing_source_file (start);
4550 input_line_pointer[-1] = c;
4557 input_line_pointer++;
4558 c = get_single_number ();
4559 FRAG_APPEND_1_CHAR (c);
4560 if (*input_line_pointer != '>')
4562 as_bad (_("expected <nn>"));
4564 input_line_pointer++;
4567 input_line_pointer++;
4571 c = *input_line_pointer;
4574 demand_empty_rest_of_line ();
4577 /* FIXME-SOMEDAY: I had trouble here on characters with the
4578 high bits set. We'll probably also have trouble with
4579 multibyte chars, wide chars, etc. Also be careful about
4580 returning values bigger than 1 byte. xoxorich. */
4583 next_char_of_string (void)
4585 register unsigned int c;
4587 c = *input_line_pointer++ & CHAR_MASK;
4595 as_warn (_("unterminated string; newline inserted"));
4596 bump_line_counters ();
4599 #ifndef NO_STRING_ESCAPES
4601 switch (c = *input_line_pointer++)
4629 break; /* As itself. */
4645 for (i = 0, number = 0;
4646 ISDIGIT (c) && i < 3;
4647 c = *input_line_pointer++, i++)
4649 number = number * 8 + c - '0';
4654 --input_line_pointer;
4663 c = *input_line_pointer++;
4664 while (ISXDIGIT (c))
4667 number = number * 16 + c - '0';
4668 else if (ISUPPER (c))
4669 number = number * 16 + c - 'A' + 10;
4671 number = number * 16 + c - 'a' + 10;
4672 c = *input_line_pointer++;
4675 --input_line_pointer;
4680 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
4681 as_warn (_("unterminated string; newline inserted"));
4683 bump_line_counters ();
4688 #ifdef ONLY_STANDARD_ESCAPES
4689 as_bad (_("bad escaped character in string"));
4691 #endif /* ONLY_STANDARD_ESCAPES */
4696 #endif /* ! defined (NO_STRING_ESCAPES) */
4705 get_segmented_expression (register expressionS *expP)
4707 register segT retval;
4709 retval = expression (expP);
4710 if (expP->X_op == O_illegal
4711 || expP->X_op == O_absent
4712 || expP->X_op == O_big)
4714 as_bad (_("expected address expression"));
4715 expP->X_op = O_constant;
4716 expP->X_add_number = 0;
4717 retval = absolute_section;
4723 get_known_segmented_expression (register expressionS *expP)
4725 register segT retval;
4727 if ((retval = get_segmented_expression (expP)) == undefined_section)
4729 /* There is no easy way to extract the undefined symbol from the
4731 if (expP->X_add_symbol != NULL
4732 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
4733 as_warn (_("symbol \"%s\" undefined; zero assumed"),
4734 S_GET_NAME (expP->X_add_symbol));
4736 as_warn (_("some symbol undefined; zero assumed"));
4737 retval = absolute_section;
4738 expP->X_op = O_constant;
4739 expP->X_add_number = 0;
4741 know (retval == absolute_section || SEG_NORMAL (retval));
4745 char /* Return terminator. */
4746 get_absolute_expression_and_terminator (long *val_pointer /* Return value of expression. */)
4748 /* FIXME: val_pointer should probably be offsetT *. */
4749 *val_pointer = (long) get_absolute_expression ();
4750 return (*input_line_pointer++);
4753 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
4754 Give a warning if that happens. */
4757 demand_copy_C_string (int *len_pointer)
4761 if ((s = demand_copy_string (len_pointer)) != 0)
4765 for (len = *len_pointer; len > 0; len--)
4772 as_bad (_("this string may not contain \'\\0\'"));
4780 /* Demand string, but return a safe (=private) copy of the string.
4781 Return NULL if we can't read a string here. */
4784 demand_copy_string (int *lenP)
4786 register unsigned int c;
4792 if (*input_line_pointer == '\"')
4794 input_line_pointer++; /* Skip opening quote. */
4796 while (is_a_char (c = next_char_of_string ()))
4798 obstack_1grow (¬es, c);
4801 /* JF this next line is so demand_copy_C_string will return a
4802 null terminated string. */
4803 obstack_1grow (¬es, '\0');
4804 retval = obstack_finish (¬es);
4808 as_bad (_("missing string"));
4810 ignore_rest_of_line ();
4816 /* In: Input_line_pointer->next character.
4818 Do: Skip input_line_pointer over all whitespace.
4820 Out: 1 if input_line_pointer->end-of-line. */
4823 is_it_end_of_statement (void)
4826 return (is_end_of_line[(unsigned char) *input_line_pointer]);
4830 equals (char *sym_name, int reassign)
4835 input_line_pointer++;
4836 if (*input_line_pointer == '=')
4837 input_line_pointer++;
4839 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
4840 input_line_pointer++;
4843 stop = mri_comment_field (&stopc);
4845 assign_symbol (sym_name, !reassign);
4849 demand_empty_rest_of_line ();
4850 mri_comment_end (stop, stopc);
4854 /* .incbin -- include a file verbatim at the current location. */
4857 s_incbin (int x ATTRIBUTE_UNUSED)
4868 #ifdef md_flush_pending_output
4869 md_flush_pending_output ();
4873 filename = demand_copy_string (& len);
4874 if (filename == NULL)
4879 /* Look for optional skip and count. */
4880 if (* input_line_pointer == ',')
4882 ++ input_line_pointer;
4883 skip = get_absolute_expression ();
4887 if (* input_line_pointer == ',')
4889 ++ input_line_pointer;
4891 count = get_absolute_expression ();
4893 as_warn (_(".incbin count zero, ignoring `%s'"), filename);
4899 demand_empty_rest_of_line ();
4901 /* Try opening absolute path first, then try include dirs. */
4902 binfile = fopen (filename, FOPEN_RB);
4903 if (binfile == NULL)
4907 path = xmalloc ((unsigned long) len + include_dir_maxlen + 5);
4909 for (i = 0; i < include_dir_count; i++)
4911 sprintf (path, "%s/%s", include_dirs[i], filename);
4913 binfile = fopen (path, FOPEN_RB);
4914 if (binfile != NULL)
4918 if (binfile == NULL)
4919 as_bad (_("file not found: %s"), filename);
4922 path = xstrdup (filename);
4928 register_dependency (path);
4930 /* Compute the length of the file. */
4931 if (fseek (binfile, 0, SEEK_END) != 0)
4933 as_bad (_("seek to end of .incbin file failed `%s'"), path);
4936 file_len = ftell (binfile);
4938 /* If a count was not specified use the remainder of the file. */
4940 count = file_len - skip;
4942 if (skip < 0 || count < 0 || file_len < 0 || skip + count > file_len)
4944 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
4945 skip, count, file_len);
4949 if (fseek (binfile, skip, SEEK_SET) != 0)
4951 as_bad (_("could not skip to %ld in file `%s'"), skip, path);
4955 /* Allocate frag space and store file contents in it. */
4956 binfrag = frag_more (count);
4958 bytes = fread (binfrag, 1, count, binfile);
4960 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
4961 path, bytes, count);
4964 if (binfile != NULL)
4970 /* .include -- include a file at this point. */
4973 s_include (int arg ATTRIBUTE_UNUSED)
4982 filename = demand_copy_string (&i);
4983 if (filename == NULL)
4985 /* demand_copy_string has already printed an error and
4986 called ignore_rest_of_line. */
4994 while (!is_end_of_line[(unsigned char) *input_line_pointer]
4995 && *input_line_pointer != ' '
4996 && *input_line_pointer != '\t')
4998 obstack_1grow (¬es, *input_line_pointer);
4999 ++input_line_pointer;
5003 obstack_1grow (¬es, '\0');
5004 filename = obstack_finish (¬es);
5005 while (!is_end_of_line[(unsigned char) *input_line_pointer])
5006 ++input_line_pointer;
5009 demand_empty_rest_of_line ();
5010 path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ );
5012 for (i = 0; i < include_dir_count; i++)
5014 strcpy (path, include_dirs[i]);
5016 strcat (path, filename);
5017 if (0 != (try = fopen (path, FOPEN_RT)))
5027 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5028 register_dependency (path);
5029 input_scrub_insert_file (path);
5033 add_include_dir (char *path)
5037 if (include_dir_count == 0)
5039 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
5040 include_dirs[0] = "."; /* Current dir. */
5041 include_dir_count = 2;
5045 include_dir_count++;
5047 (char **) realloc (include_dirs,
5048 include_dir_count * sizeof (*include_dirs));
5051 include_dirs[include_dir_count - 1] = path; /* New one. */
5054 if (i > include_dir_maxlen)
5055 include_dir_maxlen = i;
5058 /* Output debugging information to denote the source file. */
5061 generate_file_debug (void)
5063 if (debug_type == DEBUG_STABS)
5064 stabs_generate_asm_file ();
5067 /* Output line number debugging information for the current source line. */
5070 generate_lineno_debug (void)
5074 case DEBUG_UNSPECIFIED:
5079 stabs_generate_asm_lineno ();
5082 ecoff_generate_asm_lineno ();
5085 /* ??? We could here indicate to dwarf2dbg.c that something
5086 has changed. However, since there is additional backend
5087 support that is required (calling dwarf2_emit_insn), we
5088 let dwarf2dbg.c call as_where on its own. */
5093 /* Output debugging information to mark a function entry point or end point.
5094 END_P is zero for .func, and non-zero for .endfunc. */
5099 do_s_func (end_p, NULL);
5102 /* Subroutine of s_func so targets can choose a different default prefix.
5103 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5106 do_s_func (int end_p, const char *default_prefix)
5108 /* Record the current function so that we can issue an error message for
5109 misplaced .func,.endfunc, and also so that .endfunc needs no
5111 static char *current_name;
5112 static char *current_label;
5116 if (current_name == NULL)
5118 as_bad (_("missing .func"));
5119 ignore_rest_of_line ();
5123 if (debug_type == DEBUG_STABS)
5124 stabs_generate_asm_endfunc (current_name, current_label);
5126 current_name = current_label = NULL;
5131 char delim1, delim2;
5133 if (current_name != NULL)
5135 as_bad (_(".endfunc missing for previous .func"));
5136 ignore_rest_of_line ();
5140 name = input_line_pointer;
5141 delim1 = get_symbol_end ();
5142 name = xstrdup (name);
5143 *input_line_pointer = delim1;
5145 if (*input_line_pointer != ',')
5148 asprintf (&label, "%s%s", default_prefix, name);
5151 char leading_char = bfd_get_symbol_leading_char (stdoutput);
5152 /* Missing entry point, use function's name with the leading
5155 asprintf (&label, "%c%s", leading_char, name);
5162 ++input_line_pointer;
5164 label = input_line_pointer;
5165 delim2 = get_symbol_end ();
5166 label = xstrdup (label);
5167 *input_line_pointer = delim2;
5170 if (debug_type == DEBUG_STABS)
5171 stabs_generate_asm_func (name, label);
5173 current_name = name;
5174 current_label = label;
5177 demand_empty_rest_of_line ();
5181 s_ignore (int arg ATTRIBUTE_UNUSED)
5183 ignore_rest_of_line ();
5187 read_print_statistics (FILE *file)
5189 hash_print_statistics (file, "pseudo-op table", po_hash);
5192 /* Inserts the given line into the input stream.
5194 This call avoids macro/conditionals nesting checking, since the contents of
5195 the line are assumed to replace the contents of a line already scanned.
5197 An appropriate use of this function would be substitution of input lines when
5198 called by md_start_line_hook(). The given line is assumed to already be
5199 properly scrubbed. */
5202 input_scrub_insert_line (const char *line)
5206 sb_add_string (&newline, line);
5207 input_scrub_include_sb (&newline, input_line_pointer, 0);
5209 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5212 /* Insert a file into the input stream; the path must resolve to an actual
5213 file; no include path searching or dependency registering is performed. */
5216 input_scrub_insert_file (char *path)
5218 input_scrub_include_file (path, input_line_pointer);
5219 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
5222 /* Find the end of a line, considering quotation and escaping of quotes. */
5224 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5225 # define TC_SINGLE_QUOTE_STRINGS 1
5229 _find_end_of_line (char *s, int mri_string, int insn ATTRIBUTE_UNUSED)
5231 char inquote = '\0';
5234 while (!is_end_of_line[(unsigned char) *s]
5235 || (inquote && !ISCNTRL (*s))
5236 || (inquote == '\'' && flag_mri)
5237 #ifdef TC_EOL_IN_INSN
5238 || (insn && TC_EOL_IN_INSN (s))
5242 if (mri_string && *s == '\'')
5246 else if (*s == '\\')
5250 #ifdef TC_SINGLE_QUOTE_STRINGS
5251 || (TC_SINGLE_QUOTE_STRINGS && *s == '\'')
5258 as_warn (_("missing closing `%c'"), inquote);
5260 as_warn (_("stray `\\'"));
5265 find_end_of_line (char *s, int mri_string)
5267 return _find_end_of_line (s, mri_string, 0);