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},
328 {"error", s_errwarn
, 1},
329 {"exitm", s_mexit
, 0},
331 {"extern", s_ignore
, 0}, /* We treat all undef as ext. */
332 {"appfile", s_app_file
, 1},
333 {"appline", s_app_line
, 0},
335 {"file", s_app_file
, 0},
337 {"float", float_cons
, 'f'},
338 {"format", s_ignore
, 0},
340 {"global", s_globl
, 0},
341 {"globl", s_globl
, 0},
343 {"if", s_if
, (int) O_ne
},
346 {"ifdef", s_ifdef
, 0},
347 {"ifeq", s_if
, (int) O_eq
},
348 {"ifeqs", s_ifeqs
, 0},
349 {"ifge", s_if
, (int) O_ge
},
350 {"ifgt", s_if
, (int) O_gt
},
351 {"ifle", s_if
, (int) O_le
},
352 {"iflt", s_if
, (int) O_lt
},
355 {"ifndef", s_ifdef
, 1},
356 {"ifne", s_if
, (int) O_ne
},
357 {"ifnes", s_ifeqs
, 1},
358 {"ifnotdef", s_ifdef
, 1},
359 {"incbin", s_incbin
, 0},
360 {"include", s_include
, 0},
366 {"lcomm", s_lcomm
, 0},
367 {"lflags", listing_flags
, 0}, /* Listing flags. */
368 {"linkonce", s_linkonce
, 0},
369 {"list", listing_list
, 1}, /* Turn listing on. */
370 {"llen", listing_psize
, 1},
373 {"macro", s_macro
, 0},
374 {"mexit", s_mexit
, 0},
376 {".mri", s_mri
, 0}, /* Special case so .mri works in MRI mode. */
377 {"name", s_ignore
, 0},
378 {"noaltmacro", s_altmacro
, 0},
379 {"noformat", s_ignore
, 0},
380 {"nolist", listing_list
, 0}, /* Turn listing off. */
381 {"nopage", listing_nopage
, 0},
383 {"offset", s_struct
, 0},
385 {"p2align", s_align_ptwo
, 0},
386 {"p2alignw", s_align_ptwo
, -2},
387 {"p2alignl", s_align_ptwo
, -4},
388 {"page", listing_eject
, 0},
389 {"plen", listing_psize
, 0},
390 {"print", s_print
, 0},
391 {"psize", listing_psize
, 0}, /* Set paper size. */
392 {"purgem", s_purgem
, 0},
397 {"sbttl", listing_title
, 1}, /* Subtitle of listing. */
402 {"single", float_cons
, 'f'},
404 {"space", s_space
, 0},
405 {"skip", s_space
, 0},
406 {"sleb128", s_leb128
, 1},
407 {"spc", s_ignore
, 0},
408 {"stabd", s_stab
, 'd'},
409 {"stabn", s_stab
, 'n'},
410 {"stabs", s_stab
, 's'},
411 {"string", stringer
, 1},
412 {"struct", s_struct
, 0},
416 /* This is for gcc to use. It's only just been added (2/94), so gcc
417 won't be able to use it for a while -- probably a year or more.
418 But once this has been released, check with gcc maintainers
419 before deleting it or even changing the spelling. */
420 {"this_GCC_requires_the_GNU_assembler", s_ignore
, 0},
421 /* If we're folding case -- done for some targets, not necessarily
422 all -- the above string in an input file will be converted to
423 this one. Match it either way... */
424 {"this_gcc_requires_the_gnu_assembler", s_ignore
, 0},
426 {"title", listing_title
, 0}, /* Listing title. */
427 {"ttl", listing_title
, 0},
429 {"uleb128", s_leb128
, 0},
433 {"xdef", s_globl
, 0},
434 {"xref", s_ignore
, 0},
435 {"xstabs", s_xstab
, 's'},
436 {"warning", s_errwarn
, 0},
437 {"weakref", s_weakref
, 0},
439 {"zero", s_space
, 0},
440 {NULL
, NULL
, 0} /* End sentinel. */
444 get_absolute_expr (expressionS
*exp
)
446 expression_and_evaluate (exp
);
447 if (exp
->X_op
!= O_constant
)
449 if (exp
->X_op
!= O_absent
)
450 as_bad (_("bad or irreducible absolute expression"));
451 exp
->X_add_number
= 0;
453 return exp
->X_add_number
;
457 get_absolute_expression (void)
461 return get_absolute_expr (&exp
);
464 static int pop_override_ok
= 0;
465 static const char *pop_table_name
;
468 pop_insert (const pseudo_typeS
*table
)
471 const pseudo_typeS
*pop
;
472 for (pop
= table
; pop
->poc_name
; pop
++)
474 errtxt
= hash_insert (po_hash
, pop
->poc_name
, (char *) pop
);
475 if (errtxt
&& (!pop_override_ok
|| strcmp (errtxt
, "exists")))
476 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name
,
481 #ifndef md_pop_insert
482 #define md_pop_insert() pop_insert(md_pseudo_table)
485 #ifndef obj_pop_insert
486 #define obj_pop_insert() pop_insert(obj_pseudo_table)
489 #ifndef cfi_pop_insert
490 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
496 po_hash
= hash_new ();
498 /* Do the target-specific pseudo ops. */
499 pop_table_name
= "md";
502 /* Now object specific. Skip any that were in the target table. */
503 pop_table_name
= "obj";
507 /* Now portable ones. Skip any that we've seen already. */
508 pop_table_name
= "standard";
509 pop_insert (potable
);
511 #ifdef TARGET_USE_CFIPOP
512 pop_table_name
= "cfi";
518 #define HANDLE_CONDITIONAL_ASSEMBLY() \
519 if (ignore_input ()) \
521 char *eol = find_end_of_line (input_line_pointer, flag_m68k_mri); \
522 input_line_pointer = (input_line_pointer <= buffer_limit \
523 && eol >= buffer_limit) \
529 /* This function is used when scrubbing the characters between #APP
532 static char *scrub_string
;
533 static char *scrub_string_end
;
536 scrub_from_string (char *buf
, int buflen
)
540 copy
= scrub_string_end
- scrub_string
;
543 memcpy (buf
, scrub_string
, copy
);
544 scrub_string
+= copy
;
548 /* Helper function of read_a_source_file, which tries to expand a macro. */
550 try_macro (char term
, const char *line
)
556 if (check_macro (line
, &out
, &err
, ¯o
))
560 *input_line_pointer
++ = term
;
561 input_scrub_include_sb (&out
,
562 input_line_pointer
, 1);
565 input_scrub_next_buffer (&input_line_pointer
);
567 md_macro_info (macro
);
574 /* We read the file, putting things into a web that represents what we
575 have been reading. */
577 read_a_source_file (char *name
)
580 register char *s
; /* String of symbol, '\0' appended. */
588 buffer
= input_scrub_new_file (name
);
591 listing_newline (NULL
);
592 register_dependency (name
);
594 /* Generate debugging information before we've read anything in to denote
595 this file as the "main" source file and not a subordinate one
596 (e.g. N_SO vs N_SOL in stabs). */
597 generate_file_debug ();
599 while ((buffer_limit
= input_scrub_next_buffer (&input_line_pointer
)) != 0)
600 { /* We have another line to parse. */
602 /* In order to avoid listing macro expansion lines with labels
603 multiple times, keep track of which line was last issued. */
604 static char *last_eol
;
608 know (buffer_limit
[-1] == '\n'); /* Must have a sentinel. */
610 while (input_line_pointer
< buffer_limit
)
612 /* We have more of this buffer to parse. */
614 /* We now have input_line_pointer->1st char of next line.
615 If input_line_pointer [-1] == '\n' then we just
616 scanned another line: so bump line counters. */
617 if (is_end_of_line
[(unsigned char) input_line_pointer
[-1]])
619 #ifdef md_start_line_hook
620 md_start_line_hook ();
622 if (input_line_pointer
[-1] == '\n')
623 bump_line_counters ();
627 if (LABELS_WITHOUT_COLONS
|| flag_m68k_mri
)
629 /* Text at the start of a line must be a label, we
630 run down and stick a colon in. */
631 if (is_name_beginner (*input_line_pointer
))
633 char *line_start
= input_line_pointer
;
638 HANDLE_CONDITIONAL_ASSEMBLY ();
640 c
= get_symbol_end ();
642 /* In MRI mode, the EQU and MACRO pseudoops must
643 be handled specially. */
647 char *rest
= input_line_pointer
+ 1;
651 if (*rest
== ' ' || *rest
== '\t')
653 if ((strncasecmp (rest
, "EQU", 3) == 0
654 || strncasecmp (rest
, "SET", 3) == 0)
655 && (rest
[3] == ' ' || rest
[3] == '\t'))
657 input_line_pointer
= rest
+ 3;
659 strncasecmp (rest
, "SET", 3) == 0);
662 if (strncasecmp (rest
, "MACRO", 5) == 0
665 || is_end_of_line
[(unsigned char) rest
[5]]))
669 /* In MRI mode, we need to handle the MACRO
670 pseudo-op specially: we don't want to put the
671 symbol in the symbol table. */
673 #ifdef TC_START_LABEL_WITHOUT_COLON
674 && TC_START_LABEL_WITHOUT_COLON(c
,
678 line_label
= colon (line_start
);
680 line_label
= symbol_create (line_start
,
685 *input_line_pointer
= c
;
687 input_line_pointer
++;
692 /* We are at the beginning of a line, or similar place.
693 We expect a well-formed assembler statement.
694 A "symbol-name:" is a statement.
696 Depending on what compiler is used, the order of these tests
697 may vary to catch most common case 1st.
698 Each test is independent of all other tests at the (top) level.
699 PLEASE make a compiler that doesn't use this assembler.
700 It is crufty to waste a compiler's time encoding things for this
701 assembler, which then wastes more time decoding it.
702 (And communicating via (linear) files is silly!
703 If you must pass stuff, please pass a tree!) */
704 if ((c
= *input_line_pointer
++) == '\t'
708 c
= *input_line_pointer
++;
710 know (c
!= ' '); /* No further leading whitespace. */
713 /* If listing is on, and we are expanding a macro, then give
714 the listing code the contents of the expanded line. */
717 if ((listing
& LISTING_MACEXP
) && macro_nest
> 0)
722 /* Find the end of the current expanded macro line. */
723 s
= find_end_of_line (input_line_pointer
- 1, flag_m68k_mri
);
728 /* Copy it for safe keeping. Also give an indication of
729 how much macro nesting is involved at this point. */
730 len
= s
- (input_line_pointer
- 1);
731 copy
= (char *) xmalloc (len
+ macro_nest
+ 2);
732 memset (copy
, '>', macro_nest
);
733 copy
[macro_nest
] = ' ';
734 memcpy (copy
+ macro_nest
+ 1, input_line_pointer
- 1, len
);
735 copy
[macro_nest
+ 1 + len
] = '\0';
737 /* Install the line with the listing facility. */
738 listing_newline (copy
);
742 listing_newline (NULL
);
745 /* C is the 1st significant character.
746 Input_line_pointer points after that character. */
747 if (is_name_beginner (c
))
749 /* Want user-defined label or pseudo/opcode. */
750 HANDLE_CONDITIONAL_ASSEMBLY ();
752 s
= --input_line_pointer
;
753 c
= get_symbol_end (); /* name's delimiter. */
755 /* C is character after symbol.
756 That character's place in the input line is now '\0'.
757 S points to the beginning of the symbol.
758 [In case of pseudo-op, s->'.'.]
759 Input_line_pointer->'\0' where c was. */
760 if (TC_START_LABEL (c
, input_line_pointer
))
764 char *rest
= input_line_pointer
+ 1;
766 /* In MRI mode, \tsym: set 0 is permitted. */
770 if (*rest
== ' ' || *rest
== '\t')
773 if ((strncasecmp (rest
, "EQU", 3) == 0
774 || strncasecmp (rest
, "SET", 3) == 0)
775 && (rest
[3] == ' ' || rest
[3] == '\t'))
777 input_line_pointer
= rest
+ 3;
783 line_label
= colon (s
); /* User-defined label. */
784 /* Put ':' back for error messages' sake. */
785 *input_line_pointer
++ = ':';
786 #ifdef tc_check_label
787 tc_check_label (line_label
);
789 /* Input_line_pointer->after ':'. */
792 else if (input_line_pointer
[1] == '='
794 || ((c
== ' ' || c
== '\t')
795 && input_line_pointer
[2] == '=')))
798 demand_empty_rest_of_line ();
801 || ((c
== ' ' || c
== '\t')
802 && input_line_pointer
[1] == '='))
803 #ifdef TC_EQUAL_IN_INSN
804 && !TC_EQUAL_IN_INSN (c
, s
)
809 demand_empty_rest_of_line ();
813 /* Expect pseudo-op or machine instruction. */
816 #ifndef TC_CASE_SENSITIVE
820 strncpy (original_case_string
, s2
, sizeof (original_case_string
));
821 original_case_string
[sizeof (original_case_string
) - 1] = 0;
830 if (NO_PSEUDO_DOT
|| flag_m68k_mri
)
832 /* The MRI assembler uses pseudo-ops without
834 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
);
835 if (pop
!= NULL
&& pop
->poc_handler
== NULL
)
840 || (!flag_m68k_mri
&& *s
== '.'))
844 WARNING: c has next char, which may be end-of-line.
845 We lookup the pseudo-op table with s+1 because we
846 already know that the pseudo-op begins with a '.'. */
849 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
+ 1);
850 if (pop
&& !pop
->poc_handler
)
853 /* In MRI mode, we may need to insert an
854 automatic alignment directive. What a hack
856 if (mri_pending_align
858 || !((pop
->poc_handler
== cons
859 && pop
->poc_val
== 1)
860 || (pop
->poc_handler
== s_space
861 && pop
->poc_val
== 1)
862 #ifdef tc_conditional_pseudoop
863 || tc_conditional_pseudoop (pop
)
865 || pop
->poc_handler
== s_if
866 || pop
->poc_handler
== s_ifdef
867 || pop
->poc_handler
== s_ifc
868 || pop
->poc_handler
== s_ifeqs
869 || pop
->poc_handler
== s_else
870 || pop
->poc_handler
== s_endif
871 || pop
->poc_handler
== s_globl
872 || pop
->poc_handler
== s_ignore
)))
874 do_align (1, (char *) NULL
, 0, 0);
875 mri_pending_align
= 0;
877 if (line_label
!= NULL
)
879 symbol_set_frag (line_label
, frag_now
);
880 S_SET_VALUE (line_label
, frag_now_fix ());
884 /* Print the error msg now, while we still can. */
887 char *end
= input_line_pointer
;
889 *input_line_pointer
= c
;
891 c
= *--input_line_pointer
;
892 *input_line_pointer
= '\0';
893 if (! macro_defined
|| ! try_macro (c
, s
))
896 as_bad (_("unknown pseudo-op: `%s'"), s
);
897 *input_line_pointer
++ = c
;
902 /* Put it back for error messages etc. */
903 *input_line_pointer
= c
;
904 /* The following skip of whitespace is compulsory.
905 A well shaped space is sometimes all that separates
906 keyword from operands. */
907 if (c
== ' ' || c
== '\t')
908 input_line_pointer
++;
910 /* Input_line is restored.
911 Input_line_pointer->1st non-blank char
912 after pseudo-operation. */
913 (*pop
->poc_handler
) (pop
->poc_val
);
915 /* If that was .end, just get out now. */
916 if (pop
->poc_handler
== s_end
)
921 /* WARNING: c has char, which may be end-of-line. */
922 /* Also: input_line_pointer->`\0` where c was. */
923 *input_line_pointer
= c
;
924 input_line_pointer
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 1);
925 c
= *input_line_pointer
;
926 *input_line_pointer
= '\0';
928 generate_lineno_debug ();
930 if (macro_defined
&& try_macro (c
, s
))
933 if (mri_pending_align
)
935 do_align (1, (char *) NULL
, 0, 0);
936 mri_pending_align
= 0;
937 if (line_label
!= NULL
)
939 symbol_set_frag (line_label
, frag_now
);
940 S_SET_VALUE (line_label
, frag_now_fix ());
944 md_assemble (s
); /* Assemble 1 instruction. */
946 *input_line_pointer
++ = c
;
948 /* We resume loop AFTER the end-of-line from
955 /* Empty statement? */
956 if (is_end_of_line
[(unsigned char) c
])
959 if ((LOCAL_LABELS_DOLLAR
|| LOCAL_LABELS_FB
) && ISDIGIT (c
))
961 /* local label ("4:") */
962 char *backup
= input_line_pointer
;
964 HANDLE_CONDITIONAL_ASSEMBLY ();
968 /* Read the whole number. */
969 while (ISDIGIT (*input_line_pointer
))
971 temp
= (temp
* 10) + *input_line_pointer
- '0';
972 ++input_line_pointer
;
975 if (LOCAL_LABELS_DOLLAR
976 && *input_line_pointer
== '$'
977 && *(input_line_pointer
+ 1) == ':')
979 input_line_pointer
+= 2;
981 if (dollar_label_defined (temp
))
983 as_fatal (_("label \"%d$\" redefined"), temp
);
986 define_dollar_label (temp
);
987 colon (dollar_label_name (temp
, 0));
992 && *input_line_pointer
++ == ':')
994 fb_label_instance_inc (temp
);
995 colon (fb_label_name (temp
, 0));
999 input_line_pointer
= backup
;
1000 } /* local label ("4:") */
1002 if (c
&& strchr (line_comment_chars
, c
))
1003 { /* Its a comment. Better say APP or NO_APP. */
1008 unsigned int new_length
;
1011 bump_line_counters ();
1012 s
= input_line_pointer
;
1013 if (strncmp (s
, "APP\n", 4))
1014 continue; /* We ignore it */
1018 ends
= strstr (s
, "#NO_APP\n");
1022 unsigned int tmp_len
;
1025 /* The end of the #APP wasn't in this buffer. We
1026 keep reading in buffers until we find the #NO_APP
1027 that goes with this #APP There is one. The specs
1029 tmp_len
= buffer_limit
- s
;
1030 tmp_buf
= xmalloc (tmp_len
+ 1);
1031 memcpy (tmp_buf
, s
, tmp_len
);
1034 new_tmp
= input_scrub_next_buffer (&buffer
);
1038 buffer_limit
= new_tmp
;
1039 input_line_pointer
= buffer
;
1040 ends
= strstr (buffer
, "#NO_APP\n");
1042 num
= ends
- buffer
;
1044 num
= buffer_limit
- buffer
;
1046 tmp_buf
= xrealloc (tmp_buf
, tmp_len
+ num
);
1047 memcpy (tmp_buf
+ tmp_len
, buffer
, num
);
1052 input_line_pointer
= ends
? ends
+ 8 : NULL
;
1060 input_line_pointer
= ends
+ 8;
1064 scrub_string_end
= ends
;
1066 new_length
= ends
- s
;
1067 new_buf
= (char *) xmalloc (new_length
);
1074 space
= (new_buf
+ new_length
) - new_tmp
;
1075 size
= do_scrub_chars (scrub_from_string
, new_tmp
, space
);
1083 new_buf
= xrealloc (new_buf
, new_length
+ 100);
1084 new_tmp
= new_buf
+ new_length
;
1091 /* We've "scrubbed" input to the preferred format. In the
1092 process we may have consumed the whole of the remaining
1093 file (and included files). We handle this formatted
1094 input similar to that of macro expansion, letting
1095 actual macro expansion (possibly nested) and other
1096 input expansion work. Beware that in messages, line
1097 numbers and possibly file names will be incorrect. */
1098 sb_add_string (&sbuf
, new_buf
);
1099 input_scrub_include_sb (&sbuf
, input_line_pointer
, 0);
1101 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1106 HANDLE_CONDITIONAL_ASSEMBLY ();
1108 #ifdef tc_unrecognized_line
1109 if (tc_unrecognized_line (c
))
1112 input_line_pointer
--;
1113 /* Report unknown char as ignored. */
1114 demand_empty_rest_of_line ();
1117 #ifdef md_after_pass_hook
1118 md_after_pass_hook ();
1127 /* Close the input file. */
1128 input_scrub_close ();
1129 #ifdef WARN_COMMENTS
1131 if (warn_comment
&& found_comment
)
1132 as_warn_where (found_comment_file
, found_comment
,
1133 "first comment found here");
1138 /* Convert O_constant expression EXP into the equivalent O_big representation.
1139 Take the sign of the number from X_unsigned rather than X_add_number. */
1142 convert_to_bignum (expressionS
*exp
)
1147 value
= exp
->X_add_number
;
1148 for (i
= 0; i
< sizeof (exp
->X_add_number
) / CHARS_PER_LITTLENUM
; i
++)
1150 generic_bignum
[i
] = value
& LITTLENUM_MASK
;
1151 value
>>= LITTLENUM_NUMBER_OF_BITS
;
1153 /* Add a sequence of sign bits if the top bit of X_add_number is not
1154 the sign of the original value. */
1155 if ((exp
->X_add_number
< 0) != !exp
->X_unsigned
)
1156 generic_bignum
[i
++] = exp
->X_unsigned
? 0 : LITTLENUM_MASK
;
1158 exp
->X_add_number
= i
;
1161 /* For most MRI pseudo-ops, the line actually ends at the first
1162 nonquoted space. This function looks for that point, stuffs a null
1163 in, and sets *STOPCP to the character that used to be there, and
1164 returns the location.
1166 Until I hear otherwise, I am going to assume that this is only true
1167 for the m68k MRI assembler. */
1170 mri_comment_field (char *stopcp
)
1176 know (flag_m68k_mri
);
1178 for (s
= input_line_pointer
;
1179 ((!is_end_of_line
[(unsigned char) *s
] && *s
!= ' ' && *s
!= '\t')
1187 for (s
= input_line_pointer
;
1188 !is_end_of_line
[(unsigned char) *s
];
1198 /* Skip to the end of an MRI comment field. */
1201 mri_comment_end (char *stop
, int stopc
)
1205 input_line_pointer
= stop
;
1207 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1208 ++input_line_pointer
;
1212 s_abort (int ignore ATTRIBUTE_UNUSED
)
1214 as_fatal (_(".abort detected. Abandoning ship."));
1217 /* Guts of .align directive. N is the power of two to which to align.
1218 FILL may be NULL, or it may point to the bytes of the fill pattern.
1219 LEN is the length of whatever FILL points to, if anything. MAX is
1220 the maximum number of characters to skip when doing the alignment,
1221 or 0 if there is no maximum. */
1224 do_align (int n
, char *fill
, int len
, int max
)
1226 if (now_seg
== absolute_section
)
1230 if (*fill
++ != '\0')
1232 as_warn (_("ignoring fill value in absolute section"));
1239 #ifdef md_flush_pending_output
1240 md_flush_pending_output ();
1243 md_do_align (n
, fill
, len
, max
, just_record_alignment
);
1246 /* Only make a frag if we HAVE to... */
1247 if (n
!= 0 && !need_pass_2
)
1251 if (subseg_text_p (now_seg
))
1252 frag_align_code (n
, max
);
1254 frag_align (n
, 0, max
);
1257 frag_align (n
, *fill
, max
);
1259 frag_align_pattern (n
, fill
, len
, max
);
1263 just_record_alignment
: ATTRIBUTE_UNUSED_LABEL
1266 record_alignment (now_seg
, n
- OCTETS_PER_BYTE_POWER
);
1269 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1270 (in bytes). A negative ARG is the negative of the length of the
1271 fill pattern. BYTES_P is non-zero if the alignment value should be
1272 interpreted as the byte boundary, rather than the power of 2. */
1274 #define ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1277 s_align (int arg
, int bytes_p
)
1279 unsigned int align_limit
= ALIGN_LIMIT
;
1288 stop
= mri_comment_field (&stopc
);
1290 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1295 align
= arg
; /* Default value from pseudo-op table. */
1299 align
= get_absolute_expression ();
1305 /* Convert to a power of 2. */
1310 for (i
= 0; (align
& 1) == 0; align
>>= 1, ++i
)
1313 as_bad (_("alignment not a power of 2"));
1319 if (align
> align_limit
)
1321 align
= align_limit
;
1322 as_warn (_("alignment too large: %u assumed"), align
);
1325 if (*input_line_pointer
!= ',')
1332 ++input_line_pointer
;
1333 if (*input_line_pointer
== ',')
1337 fill
= get_absolute_expression ();
1342 if (*input_line_pointer
!= ',')
1346 ++input_line_pointer
;
1347 max
= get_absolute_expression ();
1354 as_warn (_("expected fill pattern missing"));
1355 do_align (align
, (char *) NULL
, 0, max
);
1370 do_align (align
, &fill_char
, fill_len
, max
);
1376 if ((size_t) fill_len
> sizeof ab
)
1378 md_number_to_chars (ab
, fill
, fill_len
);
1379 do_align (align
, ab
, fill_len
, max
);
1383 demand_empty_rest_of_line ();
1386 mri_comment_end (stop
, stopc
);
1389 /* Handle the .align pseudo-op on machines where ".align 4" means
1390 align to a 4 byte boundary. */
1393 s_align_bytes (int arg
)
1398 /* Handle the .align pseudo-op on machines where ".align 4" means align
1399 to a 2**4 boundary. */
1402 s_align_ptwo (int arg
)
1407 /* Switch in and out of alternate macro mode. */
1412 demand_empty_rest_of_line ();
1413 macro_set_alternate (on
);
1417 s_comm_internal (int param
,
1418 symbolS
*(*comm_parse_extra
) (int, symbolS
*, addressT
))
1424 symbolS
*symbolP
= NULL
;
1430 stop
= mri_comment_field (&stopc
);
1432 name
= input_line_pointer
;
1433 c
= get_symbol_end ();
1434 /* Just after name is now '\0'. */
1435 p
= input_line_pointer
;
1440 as_bad (_("expected symbol name"));
1441 ignore_rest_of_line ();
1447 /* Accept an optional comma after the name. The comma used to be
1448 required, but Irix 5 cc does not generate it for .lcomm. */
1449 if (*input_line_pointer
== ',')
1450 input_line_pointer
++;
1452 temp
= get_absolute_expr (&exp
);
1454 size
&= ((offsetT
) 2 << (stdoutput
->arch_info
->bits_per_address
- 1)) - 1;
1455 if (exp
.X_op
== O_absent
)
1457 as_bad (_("missing size expression"));
1458 ignore_rest_of_line ();
1461 else if (temp
!= size
|| !exp
.X_unsigned
)
1463 as_warn (_("size (%ld) out of range, ignored"), (long) temp
);
1464 ignore_rest_of_line ();
1469 symbolP
= symbol_find_or_make (name
);
1470 if (S_IS_DEFINED (symbolP
) && !S_IS_COMMON (symbolP
))
1473 as_bad (_("symbol `%s' is already defined"), name
);
1475 ignore_rest_of_line ();
1479 size
= S_GET_VALUE (symbolP
);
1482 else if (size
!= temp
)
1483 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1484 name
, (long) size
, (long) temp
);
1487 if (comm_parse_extra
!= NULL
)
1488 symbolP
= (*comm_parse_extra
) (param
, symbolP
, size
);
1491 S_SET_VALUE (symbolP
, (valueT
) size
);
1492 S_SET_EXTERNAL (symbolP
);
1495 extern int flag_one
;
1496 if (size
== 0 || !flag_one
)
1497 S_GET_OTHER (symbolP
) = const_flag
;
1502 demand_empty_rest_of_line ();
1505 mri_comment_end (stop
, stopc
);
1512 s_comm_internal (ignore
, NULL
);
1515 /* The MRI COMMON pseudo-op. We handle this by creating a common
1516 symbol with the appropriate name. We make s_space do the right
1517 thing by increasing the size. */
1520 s_mri_common (int small ATTRIBUTE_UNUSED
)
1536 stop
= mri_comment_field (&stopc
);
1540 name
= input_line_pointer
;
1541 if (!ISDIGIT (*name
))
1542 c
= get_symbol_end ();
1547 ++input_line_pointer
;
1549 while (ISDIGIT (*input_line_pointer
));
1551 c
= *input_line_pointer
;
1552 *input_line_pointer
= '\0';
1554 if (line_label
!= NULL
)
1556 alc
= (char *) xmalloc (strlen (S_GET_NAME (line_label
))
1557 + (input_line_pointer
- name
)
1559 sprintf (alc
, "%s%s", name
, S_GET_NAME (line_label
));
1564 sym
= symbol_find_or_make (name
);
1565 *input_line_pointer
= c
;
1569 if (*input_line_pointer
!= ',')
1573 ++input_line_pointer
;
1574 align
= get_absolute_expression ();
1577 if (S_IS_DEFINED (sym
) && !S_IS_COMMON (sym
))
1579 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym
));
1580 ignore_rest_of_line ();
1581 mri_comment_end (stop
, stopc
);
1585 S_SET_EXTERNAL (sym
);
1586 mri_common_symbol
= sym
;
1590 S_SET_ALIGN (sym
, align
);
1593 if (line_label
!= NULL
)
1596 exp
.X_op
= O_symbol
;
1597 exp
.X_add_symbol
= sym
;
1598 exp
.X_add_number
= 0;
1599 symbol_set_value_expression (line_label
, &exp
);
1600 symbol_set_frag (line_label
, &zero_address_frag
);
1601 S_SET_SEGMENT (line_label
, expr_section
);
1604 /* FIXME: We just ignore the small argument, which distinguishes
1605 COMMON and COMMON.S. I don't know what we can do about it. */
1607 /* Ignore the type and hptype. */
1608 if (*input_line_pointer
== ',')
1609 input_line_pointer
+= 2;
1610 if (*input_line_pointer
== ',')
1611 input_line_pointer
+= 2;
1613 demand_empty_rest_of_line ();
1615 mri_comment_end (stop
, stopc
);
1619 s_data (int ignore ATTRIBUTE_UNUSED
)
1624 temp
= get_absolute_expression ();
1625 if (flag_readonly_data_in_text
)
1627 section
= text_section
;
1631 section
= data_section
;
1633 subseg_set (section
, (subsegT
) temp
);
1638 demand_empty_rest_of_line ();
1641 /* Handle the .appfile pseudo-op. This is automatically generated by
1642 do_scrub_chars when a preprocessor # line comment is seen with a
1643 file name. This default definition may be overridden by the object
1644 or CPU specific pseudo-ops. This function is also the default
1645 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1649 s_app_file_string (char *file
, int appfile ATTRIBUTE_UNUSED
)
1653 listing_source_file (file
);
1655 register_dependency (file
);
1657 obj_app_file (file
, appfile
);
1662 s_app_file (int appfile
)
1667 /* Some assemblers tolerate immediately following '"'. */
1668 if ((s
= demand_copy_string (&length
)) != 0)
1670 /* If this is a fake .appfile, a fake newline was inserted into
1671 the buffer. Passing -2 to new_logical_line tells it to
1674 = (!new_logical_line (s
, appfile
? -2 : -1) && appfile
);
1676 /* In MRI mode, the preprocessor may have inserted an extraneous
1679 && *input_line_pointer
== '\''
1680 && is_end_of_line
[(unsigned char) input_line_pointer
[1]])
1681 ++input_line_pointer
;
1683 demand_empty_rest_of_line ();
1685 s_app_file_string (s
, appfile
);
1689 /* Handle the .appline pseudo-op. This is automatically generated by
1690 do_scrub_chars when a preprocessor # line comment is seen. This
1691 default definition may be overridden by the object or CPU specific
1695 s_app_line (int ignore ATTRIBUTE_UNUSED
)
1699 /* The given number is that of the next line. */
1700 l
= get_absolute_expression () - 1;
1703 /* Some of the back ends can't deal with non-positive line numbers.
1704 Besides, it's silly. GCC however will generate a line number of
1705 zero when it is pre-processing builtins for assembler-with-cpp files:
1709 We do not want to barf on this, especially since such files are used
1710 in the GCC and GDB testsuites. So we check for negative line numbers
1711 rather than non-positive line numbers. */
1712 as_warn (_("line numbers must be positive; line number %d rejected"),
1716 new_logical_line ((char *) NULL
, l
);
1719 listing_source_line (l
);
1722 demand_empty_rest_of_line ();
1725 /* Handle the .end pseudo-op. Actually, the real work is done in
1726 read_a_source_file. */
1729 s_end (int ignore ATTRIBUTE_UNUSED
)
1733 /* The MRI assembler permits the start symbol to follow .end,
1734 but we don't support that. */
1736 if (!is_end_of_line
[(unsigned char) *input_line_pointer
]
1737 && *input_line_pointer
!= '*'
1738 && *input_line_pointer
!= '!')
1739 as_warn (_("start address not supported"));
1743 /* Handle the .err pseudo-op. */
1746 s_err (int ignore ATTRIBUTE_UNUSED
)
1748 as_bad (_(".err encountered"));
1749 demand_empty_rest_of_line ();
1752 /* Handle the .error and .warning pseudo-ops. */
1758 /* The purpose for the conditional assignment is not to
1759 internationalize the directive itself, but that we need a
1760 self-contained message, one that can be passed like the
1761 demand_copy_C_string return value, and with no assumption on the
1762 location of the name of the directive within the message. */
1764 = (err
? _(".error directive invoked in source file")
1765 : _(".warning directive invoked in source file"));
1767 if (!is_it_end_of_statement ())
1769 if (*input_line_pointer
!= '\"')
1771 as_bad (_("%s argument must be a string"),
1772 err
? ".error" : ".warning");
1773 ignore_rest_of_line ();
1777 msg
= demand_copy_C_string (&len
);
1785 as_warn ("%s", msg
);
1786 demand_empty_rest_of_line ();
1789 /* Handle the MRI fail pseudo-op. */
1792 s_fail (int ignore ATTRIBUTE_UNUSED
)
1799 stop
= mri_comment_field (&stopc
);
1801 temp
= get_absolute_expression ();
1803 as_warn (_(".fail %ld encountered"), (long) temp
);
1805 as_bad (_(".fail %ld encountered"), (long) temp
);
1807 demand_empty_rest_of_line ();
1810 mri_comment_end (stop
, stopc
);
1814 s_fill (int ignore ATTRIBUTE_UNUSED
)
1816 expressionS rep_exp
;
1818 register long fill
= 0;
1821 #ifdef md_flush_pending_output
1822 md_flush_pending_output ();
1825 get_known_segmented_expression (&rep_exp
);
1826 if (*input_line_pointer
== ',')
1828 input_line_pointer
++;
1829 size
= get_absolute_expression ();
1830 if (*input_line_pointer
== ',')
1832 input_line_pointer
++;
1833 fill
= get_absolute_expression ();
1837 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1838 #define BSD_FILL_SIZE_CROCK_8 (8)
1839 if (size
> BSD_FILL_SIZE_CROCK_8
)
1841 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8
);
1842 size
= BSD_FILL_SIZE_CROCK_8
;
1846 as_warn (_("size negative; .fill ignored"));
1849 else if (rep_exp
.X_op
== O_constant
&& rep_exp
.X_add_number
<= 0)
1851 if (rep_exp
.X_add_number
< 0)
1852 as_warn (_("repeat < 0; .fill ignored"));
1856 if (size
&& !need_pass_2
)
1858 if (rep_exp
.X_op
== O_constant
)
1860 p
= frag_var (rs_fill
, (int) size
, (int) size
,
1861 (relax_substateT
) 0, (symbolS
*) 0,
1862 (offsetT
) rep_exp
.X_add_number
,
1867 /* We don't have a constant repeat count, so we can't use
1868 rs_fill. We can get the same results out of rs_space,
1869 but its argument is in bytes, so we must multiply the
1870 repeat count by size. */
1873 rep_sym
= make_expr_symbol (&rep_exp
);
1876 expressionS size_exp
;
1877 size_exp
.X_op
= O_constant
;
1878 size_exp
.X_add_number
= size
;
1880 rep_exp
.X_op
= O_multiply
;
1881 rep_exp
.X_add_symbol
= rep_sym
;
1882 rep_exp
.X_op_symbol
= make_expr_symbol (&size_exp
);
1883 rep_exp
.X_add_number
= 0;
1884 rep_sym
= make_expr_symbol (&rep_exp
);
1887 p
= frag_var (rs_space
, (int) size
, (int) size
,
1888 (relax_substateT
) 0, rep_sym
, (offsetT
) 0, (char *) 0);
1891 memset (p
, 0, (unsigned int) size
);
1893 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1894 flavoured AS. The following bizarre behaviour is to be
1895 compatible with above. I guess they tried to take up to 8
1896 bytes from a 4-byte expression and they forgot to sign
1898 #define BSD_FILL_SIZE_CROCK_4 (4)
1899 md_number_to_chars (p
, (valueT
) fill
,
1900 (size
> BSD_FILL_SIZE_CROCK_4
1901 ? BSD_FILL_SIZE_CROCK_4
1903 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1904 but emits no error message because it seems a legal thing to do.
1905 It is a degenerate case of .fill but could be emitted by a
1908 demand_empty_rest_of_line ();
1912 s_globl (int ignore ATTRIBUTE_UNUSED
)
1921 stop
= mri_comment_field (&stopc
);
1925 name
= input_line_pointer
;
1926 c
= get_symbol_end ();
1927 symbolP
= symbol_find_or_make (name
);
1928 S_SET_EXTERNAL (symbolP
);
1930 *input_line_pointer
= c
;
1932 c
= *input_line_pointer
;
1935 input_line_pointer
++;
1937 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1943 demand_empty_rest_of_line ();
1946 mri_comment_end (stop
, stopc
);
1949 /* Handle the MRI IRP and IRPC pseudo-ops. */
1960 as_where (&file
, &line
);
1963 eol
= find_end_of_line (input_line_pointer
, 0);
1964 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
1965 input_line_pointer
= eol
;
1969 err
= expand_irp (irpc
, 0, &s
, &out
, get_line_sb
);
1971 as_bad_where (file
, line
, "%s", err
);
1975 input_scrub_include_sb (&out
, input_line_pointer
, 1);
1977 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1980 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
1981 the section to only be linked once. However, this is not supported
1982 by most object file formats. This takes an optional argument,
1983 which is what to do about duplicates. */
1986 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
1988 enum linkonce_type type
;
1992 type
= LINKONCE_DISCARD
;
1994 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1999 s
= input_line_pointer
;
2000 c
= get_symbol_end ();
2001 if (strcasecmp (s
, "discard") == 0)
2002 type
= LINKONCE_DISCARD
;
2003 else if (strcasecmp (s
, "one_only") == 0)
2004 type
= LINKONCE_ONE_ONLY
;
2005 else if (strcasecmp (s
, "same_size") == 0)
2006 type
= LINKONCE_SAME_SIZE
;
2007 else if (strcasecmp (s
, "same_contents") == 0)
2008 type
= LINKONCE_SAME_CONTENTS
;
2010 as_warn (_("unrecognized .linkonce type `%s'"), s
);
2012 *input_line_pointer
= c
;
2015 #ifdef obj_handle_link_once
2016 obj_handle_link_once (type
);
2017 #else /* ! defined (obj_handle_link_once) */
2021 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
2022 as_warn (_(".linkonce is not supported for this object file format"));
2024 flags
= bfd_get_section_flags (stdoutput
, now_seg
);
2025 flags
|= SEC_LINK_ONCE
;
2030 case LINKONCE_DISCARD
:
2031 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
2033 case LINKONCE_ONE_ONLY
:
2034 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
2036 case LINKONCE_SAME_SIZE
:
2037 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
2039 case LINKONCE_SAME_CONTENTS
:
2040 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
2043 if (!bfd_set_section_flags (stdoutput
, now_seg
, flags
))
2044 as_bad (_("bfd_set_section_flags: %s"),
2045 bfd_errmsg (bfd_get_error ()));
2047 #endif /* ! defined (obj_handle_link_once) */
2049 demand_empty_rest_of_line ();
2053 bss_alloc (symbolS
*symbolP
, addressT size
, int align
)
2056 segT current_seg
= now_seg
;
2057 subsegT current_subseg
= now_subseg
;
2058 segT bss_seg
= bss_section
;
2060 #if defined (TC_MIPS) || defined (TC_ALPHA)
2061 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
2062 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
2064 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2065 if (size
<= bfd_get_gp_size (stdoutput
))
2067 bss_seg
= subseg_new (".sbss", 1);
2068 seg_info (bss_seg
)->bss
= 1;
2069 if (!bfd_set_section_flags (stdoutput
, bss_seg
, SEC_ALLOC
))
2070 as_warn (_("error setting flags for \".sbss\": %s"),
2071 bfd_errmsg (bfd_get_error ()));
2075 subseg_set (bss_seg
, 1);
2079 record_alignment (bss_seg
, align
);
2080 frag_align (align
, 0, 0);
2083 /* Detach from old frag. */
2084 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2085 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2087 symbol_set_frag (symbolP
, frag_now
);
2088 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
, NULL
);
2092 S_SET_SIZE (symbolP
, size
);
2094 S_SET_SEGMENT (symbolP
, bss_seg
);
2097 /* The symbol may already have been created with a preceding
2098 ".globl" directive -- be careful not to step on storage class
2099 in that case. Otherwise, set it to static. */
2100 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2101 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2102 #endif /* OBJ_COFF */
2104 subseg_set (current_seg
, current_subseg
);
2108 parse_align (int align_bytes
)
2114 if (*input_line_pointer
!= ',')
2117 as_bad (_("expected alignment after size"));
2118 ignore_rest_of_line ();
2122 input_line_pointer
++;
2125 align
= get_absolute_expr (&exp
);
2126 if (exp
.X_op
== O_absent
)
2129 if (!exp
.X_unsigned
)
2131 as_warn (_("alignment negative; 0 assumed"));
2135 if (align_bytes
&& align
!= 0)
2137 /* convert to a power of 2 alignment */
2138 unsigned int alignp2
= 0;
2139 while ((align
& 1) == 0)
2140 align
>>= 1, ++alignp2
;
2143 as_bad (_("alignment not a power of 2"));
2144 ignore_rest_of_line ();
2152 /* Called from s_comm_internal after symbol name and size have been
2153 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2154 1 if this was a ".bss" directive which has a 3rd argument
2155 (alignment as a power of 2), or 2 if this was a ".bss" directive
2156 with alignment in bytes. */
2159 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2165 align
= parse_align (needs_align
- 1);
2166 if (align
== (addressT
) -1)
2170 /* Assume some objects may require alignment on some systems. */
2171 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2173 bss_alloc (symbolP
, size
, align
);
2178 s_lcomm (int needs_align
)
2180 s_comm_internal (needs_align
, s_lcomm_internal
);
2184 s_lcomm_bytes (int needs_align
)
2186 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2190 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2192 register char *name
;
2196 register symbolS
*symbolP
;
2198 /* We permit ANY defined expression: BSD4.2 demands constants. */
2199 name
= input_line_pointer
;
2200 c
= get_symbol_end ();
2201 p
= input_line_pointer
;
2206 as_bad (_("expected symbol name"));
2207 ignore_rest_of_line ();
2213 if (*input_line_pointer
!= ',')
2216 as_bad (_("expected comma after \"%s\""), name
);
2218 ignore_rest_of_line ();
2222 input_line_pointer
++;
2223 expression_and_evaluate (&exp
);
2225 if (exp
.X_op
!= O_constant
2226 && exp
.X_op
!= O_register
)
2228 as_bad (_("bad expression"));
2229 ignore_rest_of_line ();
2234 symbolP
= symbol_find_or_make (name
);
2236 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
2237 symbolP->sy_desc == 0) out of this test because coff doesn't have
2238 those fields, and I can't see when they'd ever be tripped. I
2239 don't think I understand why they were here so I may have
2240 introduced a bug. As recently as 1.37 didn't have this test
2241 anyway. xoxorich. */
2243 if (S_GET_SEGMENT (symbolP
) == undefined_section
2244 && S_GET_VALUE (symbolP
) == 0)
2246 /* The name might be an undefined .global symbol; be sure to
2247 keep the "external" bit. */
2248 S_SET_SEGMENT (symbolP
,
2249 (exp
.X_op
== O_constant
2252 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2256 as_bad (_("symbol `%s' is already defined"), name
);
2260 demand_empty_rest_of_line ();
2263 /* Read a line into an sb. Returns the character that ended the line
2264 or zero if there are no more lines. */
2267 get_line_sb (sb
*line
)
2271 if (input_line_pointer
[-1] == '\n')
2272 bump_line_counters ();
2274 if (input_line_pointer
>= buffer_limit
)
2276 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2277 if (buffer_limit
== 0)
2281 eol
= find_end_of_line (input_line_pointer
, flag_m68k_mri
);
2282 sb_add_buffer (line
, input_line_pointer
, eol
- input_line_pointer
);
2283 input_line_pointer
= eol
;
2285 /* Don't skip multiple end-of-line characters, because that breaks support
2286 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2287 characters but isn't. Instead just skip one end of line character and
2288 return the character skipped so that the caller can re-insert it if
2290 return *input_line_pointer
++;
2293 /* Define a macro. This is an interface to macro.c. */
2296 s_macro (int ignore ATTRIBUTE_UNUSED
)
2304 as_where (&file
, &line
);
2307 eol
= find_end_of_line (input_line_pointer
, 0);
2308 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2309 input_line_pointer
= eol
;
2311 if (line_label
!= NULL
)
2316 sb_add_string (&label
, S_GET_NAME (line_label
));
2317 err
= define_macro (0, &s
, &label
, get_line_sb
, file
, line
, &name
);
2321 err
= define_macro (0, &s
, NULL
, get_line_sb
, file
, line
, &name
);
2323 as_bad_where (file
, line
, err
, name
);
2326 if (line_label
!= NULL
)
2328 S_SET_SEGMENT (line_label
, absolute_section
);
2329 S_SET_VALUE (line_label
, 0);
2330 symbol_set_frag (line_label
, &zero_address_frag
);
2333 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2334 && hash_find (po_hash
, name
) != NULL
)
2337 && hash_find (po_hash
, name
+ 1) != NULL
))
2338 as_warn_where (file
,
2340 _("attempt to redefine pseudo-op `%s' ignored"),
2347 /* Handle the .mexit pseudo-op, which immediately exits a macro
2351 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2353 cond_exit_macro (macro_nest
);
2354 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2357 /* Switch in and out of MRI mode. */
2360 s_mri (int ignore ATTRIBUTE_UNUSED
)
2364 on
= get_absolute_expression ();
2365 old_flag
= flag_mri
;
2383 /* Operator precedence changes in m68k MRI mode, so we need to
2384 update the operator rankings. */
2385 expr_set_precedence ();
2387 #ifdef MRI_MODE_CHANGE
2389 MRI_MODE_CHANGE (on
);
2392 demand_empty_rest_of_line ();
2395 /* Handle changing the location counter. */
2398 do_org (segT segment
, expressionS
*exp
, int fill
)
2400 if (segment
!= now_seg
&& segment
!= absolute_section
)
2401 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2403 if (now_seg
== absolute_section
)
2406 as_warn (_("ignoring fill value in absolute section"));
2407 if (exp
->X_op
!= O_constant
)
2409 as_bad (_("only constant offsets supported in absolute section"));
2410 exp
->X_add_number
= 0;
2412 abs_section_offset
= exp
->X_add_number
;
2417 symbolS
*sym
= exp
->X_add_symbol
;
2418 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2420 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2422 /* Handle complex expressions. */
2423 sym
= make_expr_symbol (exp
);
2427 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2433 s_org (int ignore ATTRIBUTE_UNUSED
)
2435 register segT segment
;
2437 register long temp_fill
;
2439 #ifdef md_flush_pending_output
2440 md_flush_pending_output ();
2443 /* The m68k MRI assembler has a different meaning for .org. It
2444 means to create an absolute section at a given address. We can't
2445 support that--use a linker script instead. */
2448 as_bad (_("MRI style ORG pseudo-op not supported"));
2449 ignore_rest_of_line ();
2453 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2454 thing as a sub-segment-relative origin. Any absolute origin is
2455 given a warning, then assumed to be segment-relative. Any
2456 segmented origin expression ("foo+42") had better be in the right
2457 segment or the .org is ignored.
2459 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2460 we never know sub-segment sizes when we are reading code. BSD
2461 will crash trying to emit negative numbers of filler bytes in
2462 certain .orgs. We don't crash, but see as-write for that code.
2464 Don't make frag if need_pass_2==1. */
2465 segment
= get_known_segmented_expression (&exp
);
2466 if (*input_line_pointer
== ',')
2468 input_line_pointer
++;
2469 temp_fill
= get_absolute_expression ();
2475 do_org (segment
, &exp
, temp_fill
);
2477 demand_empty_rest_of_line ();
2480 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2481 called by the obj-format routine which handles section changing
2482 when in MRI mode. It will create a new section, and return it. It
2483 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2484 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2487 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2497 name
= input_line_pointer
;
2498 if (!ISDIGIT (*name
))
2499 c
= get_symbol_end ();
2504 ++input_line_pointer
;
2506 while (ISDIGIT (*input_line_pointer
));
2508 c
= *input_line_pointer
;
2509 *input_line_pointer
= '\0';
2512 name
= xstrdup (name
);
2514 *input_line_pointer
= c
;
2516 seg
= subseg_new (name
, 0);
2518 if (*input_line_pointer
== ',')
2522 ++input_line_pointer
;
2523 align
= get_absolute_expression ();
2524 record_alignment (seg
, align
);
2528 if (*input_line_pointer
== ',')
2530 c
= *++input_line_pointer
;
2532 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
2535 as_bad (_("unrecognized section type"));
2536 ++input_line_pointer
;
2541 flags
= SEC_NO_FLAGS
;
2543 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
2544 else if (*type
== 'D' || *type
== 'M')
2545 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
2546 else if (*type
== 'R')
2547 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
2548 if (flags
!= SEC_NO_FLAGS
)
2550 if (!bfd_set_section_flags (stdoutput
, seg
, flags
))
2551 as_warn (_("error setting flags for \"%s\": %s"),
2552 bfd_section_name (stdoutput
, seg
),
2553 bfd_errmsg (bfd_get_error ()));
2558 /* Ignore the HP type. */
2559 if (*input_line_pointer
== ',')
2560 input_line_pointer
+= 2;
2562 demand_empty_rest_of_line ();
2564 #else /* ! TC_M68K */
2573 name
= input_line_pointer
;
2574 c
= get_symbol_end ();
2576 name
= xstrdup (name
);
2578 *input_line_pointer
= c
;
2580 seg
= subseg_new (name
, 0);
2582 if (*input_line_pointer
!= ',')
2588 ++input_line_pointer
;
2590 sectype
= input_line_pointer
;
2591 c
= get_symbol_end ();
2592 if (*sectype
== '\0')
2594 else if (strcasecmp (sectype
, "text") == 0)
2596 else if (strcasecmp (sectype
, "data") == 0)
2598 else if (strcasecmp (sectype
, "romdata") == 0)
2601 as_warn (_("unrecognized section type `%s'"), sectype
);
2602 *input_line_pointer
= c
;
2605 if (*input_line_pointer
== ',')
2609 ++input_line_pointer
;
2611 seccmd
= input_line_pointer
;
2612 c
= get_symbol_end ();
2613 if (strcasecmp (seccmd
, "absolute") == 0)
2615 as_bad (_("absolute sections are not supported"));
2616 *input_line_pointer
= c
;
2617 ignore_rest_of_line ();
2620 else if (strcasecmp (seccmd
, "align") == 0)
2624 *input_line_pointer
= c
;
2625 align
= get_absolute_expression ();
2626 record_alignment (seg
, align
);
2630 as_warn (_("unrecognized section command `%s'"), seccmd
);
2631 *input_line_pointer
= c
;
2635 demand_empty_rest_of_line ();
2637 #else /* ! TC_I960 */
2638 /* The MRI assembler seems to use different forms of .sect for
2639 different targets. */
2640 as_bad ("MRI mode not supported for this target");
2641 ignore_rest_of_line ();
2642 #endif /* ! TC_I960 */
2643 #endif /* ! TC_M68K */
2646 /* Handle the .print pseudo-op. */
2649 s_print (int ignore ATTRIBUTE_UNUSED
)
2654 s
= demand_copy_C_string (&len
);
2657 demand_empty_rest_of_line ();
2660 /* Handle the .purgem pseudo-op. */
2663 s_purgem (int ignore ATTRIBUTE_UNUSED
)
2665 if (is_it_end_of_statement ())
2667 demand_empty_rest_of_line ();
2677 name
= input_line_pointer
;
2678 c
= get_symbol_end ();
2679 delete_macro (name
);
2680 *input_line_pointer
= c
;
2683 while (*input_line_pointer
++ == ',');
2685 --input_line_pointer
;
2686 demand_empty_rest_of_line ();
2689 /* Handle the .endm/.endr pseudo-ops. */
2692 s_bad_end (int endr
)
2694 as_warn (_(".end%c encountered without preceeding %s"),
2696 endr
? ".rept, .irp, or .irpc" : ".macro");
2697 demand_empty_rest_of_line ();
2700 /* Handle the .rept pseudo-op. */
2703 s_rept (int ignore ATTRIBUTE_UNUSED
)
2707 count
= get_absolute_expression ();
2709 do_repeat (count
, "REPT", "ENDR");
2712 /* This function provides a generic repeat block implementation. It allows
2713 different directives to be used as the start/end keys. */
2716 do_repeat (int count
, const char *start
, const char *end
)
2722 if (!buffer_and_nest (start
, end
, &one
, get_line_sb
))
2724 as_bad (_("%s without %s"), start
, end
);
2730 sb_add_sb (&many
, &one
);
2734 input_scrub_include_sb (&many
, input_line_pointer
, 1);
2736 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2739 /* Skip to end of current repeat loop; EXTRA indicates how many additional
2740 input buffers to skip. Assumes that conditionals preceding the loop end
2741 are properly nested.
2743 This function makes it easier to implement a premature "break" out of the
2744 loop. The EXTRA arg accounts for other buffers we might have inserted,
2745 such as line substitutions. */
2748 end_repeat (int extra
)
2750 cond_exit_macro (macro_nest
);
2751 while (extra
-- >= 0)
2752 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2756 assign_symbol (char *name
, int mode
)
2760 if (name
[0] == '.' && name
[1] == '\0')
2762 /* Turn '. = mumble' into a .org mumble. */
2766 segment
= get_known_segmented_expression (&exp
);
2769 do_org (segment
, &exp
, 0);
2774 if ((symbolP
= symbol_find (name
)) == NULL
2775 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
2777 symbolP
= symbol_find_or_make (name
);
2779 /* When doing symbol listings, play games with dummy fragments living
2780 outside the normal fragment chain to record the file and line info
2782 if (listing
& LISTING_SYMBOLS
)
2784 extern struct list_info_struct
*listing_tail
;
2785 fragS
*dummy_frag
= (fragS
*) xcalloc (1, sizeof (fragS
));
2786 dummy_frag
->line
= listing_tail
;
2787 dummy_frag
->fr_symbol
= symbolP
;
2788 symbol_set_frag (symbolP
, dummy_frag
);
2792 /* "set" symbols are local unless otherwise specified. */
2793 SF_SET_LOCAL (symbolP
);
2797 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
2799 /* Permit register names to be redefined. */
2800 if ((mode
!= 0 || !S_IS_VOLATILE (symbolP
))
2801 && S_GET_SEGMENT (symbolP
) != reg_section
)
2803 as_bad (_("symbol `%s' is already defined"), name
);
2804 symbolP
= symbol_clone (symbolP
, 0);
2806 /* If the symbol is volatile, copy the symbol and replace the
2807 original with the copy, so that previous uses of the symbol will
2808 retain the value of the symbol at the point of use. */
2809 else if (S_IS_VOLATILE (symbolP
)
2810 /* This could be avoided when the symbol wasn't used so far, but
2811 the comment in struc-symbol.h says this flag isn't reliable. */
2812 && (1 || symbol_used_p (symbolP
)))
2813 symbolP
= symbol_clone (symbolP
, 1);
2817 S_SET_VOLATILE (symbolP
);
2819 S_SET_FORWARD_REF (symbolP
);
2821 pseudo_set (symbolP
);
2824 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
2825 then this is .equiv, and it is an error if the symbol is already
2826 defined. If EQUIV is -1, the symbol additionally is a forward
2836 /* Especial apologies for the random logic:
2837 this just grew, and could be parsed much more simply!
2839 name
= input_line_pointer
;
2840 delim
= get_symbol_end ();
2841 end_name
= input_line_pointer
;
2844 if (name
== end_name
)
2846 as_bad (_("expected symbol name"));
2847 ignore_rest_of_line ();
2853 if (*input_line_pointer
!= ',')
2856 as_bad (_("expected comma after \"%s\""), name
);
2858 ignore_rest_of_line ();
2862 input_line_pointer
++;
2865 assign_symbol (name
, equiv
);
2868 demand_empty_rest_of_line ();
2881 #ifdef md_flush_pending_output
2882 md_flush_pending_output ();
2886 stop
= mri_comment_field (&stopc
);
2888 /* In m68k MRI mode, we need to align to a word boundary, unless
2890 if (flag_m68k_mri
&& mult
> 1)
2892 if (now_seg
== absolute_section
)
2894 abs_section_offset
+= abs_section_offset
& 1;
2895 if (line_label
!= NULL
)
2896 S_SET_VALUE (line_label
, abs_section_offset
);
2898 else if (mri_common_symbol
!= NULL
)
2902 val
= S_GET_VALUE (mri_common_symbol
);
2905 S_SET_VALUE (mri_common_symbol
, val
+ 1);
2906 if (line_label
!= NULL
)
2908 expressionS
*symexp
;
2910 symexp
= symbol_get_value_expression (line_label
);
2911 know (symexp
->X_op
== O_symbol
);
2912 know (symexp
->X_add_symbol
== mri_common_symbol
);
2913 symexp
->X_add_number
+= 1;
2919 do_align (1, (char *) NULL
, 0, 0);
2920 if (line_label
!= NULL
)
2922 symbol_set_frag (line_label
, frag_now
);
2923 S_SET_VALUE (line_label
, frag_now_fix ());
2933 if (*input_line_pointer
== ',')
2935 ++input_line_pointer
;
2940 val
.X_op
= O_constant
;
2941 val
.X_add_number
= 0;
2944 if (val
.X_op
!= O_constant
2945 || val
.X_add_number
< - 0x80
2946 || val
.X_add_number
> 0xff
2947 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
2949 resolve_expression (&exp
);
2950 if (exp
.X_op
!= O_constant
)
2951 as_bad (_("unsupported variable size or fill value"));
2958 bytes
= mult
* exp
.X_add_number
;
2959 for (i
= 0; i
< exp
.X_add_number
; i
++)
2960 emit_expr (&val
, mult
);
2965 if (now_seg
== absolute_section
|| mri_common_symbol
!= NULL
)
2966 resolve_expression (&exp
);
2968 if (exp
.X_op
== O_constant
)
2972 repeat
= exp
.X_add_number
;
2979 as_warn (_(".space repeat count is zero, ignored"));
2980 else if (repeat
< 0)
2981 as_warn (_(".space repeat count is negative, ignored"));
2985 /* If we are in the absolute section, just bump the offset. */
2986 if (now_seg
== absolute_section
)
2988 abs_section_offset
+= repeat
;
2992 /* If we are secretly in an MRI common section, then
2993 creating space just increases the size of the common
2995 if (mri_common_symbol
!= NULL
)
2997 S_SET_VALUE (mri_common_symbol
,
2998 S_GET_VALUE (mri_common_symbol
) + repeat
);
3003 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
3004 (offsetT
) repeat
, (char *) 0);
3008 if (now_seg
== absolute_section
)
3010 as_bad (_("space allocation too complex in absolute section"));
3011 subseg_set (text_section
, 0);
3014 if (mri_common_symbol
!= NULL
)
3016 as_bad (_("space allocation too complex in common section"));
3017 mri_common_symbol
= NULL
;
3021 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
3022 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
3026 *p
= val
.X_add_number
;
3031 /* In MRI mode, after an odd number of bytes, we must align to an
3032 even word boundary, unless the next instruction is a dc.b, ds.b
3034 if (flag_mri
&& (bytes
& 1) != 0)
3035 mri_pending_align
= 1;
3037 demand_empty_rest_of_line ();
3040 mri_comment_end (stop
, stopc
);
3043 /* This is like s_space, but the value is a floating point number with
3044 the given precision. This is for the MRI dcb.s pseudo-op and
3048 s_float_space (int float_type
)
3052 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
3057 stop
= mri_comment_field (&stopc
);
3059 count
= get_absolute_expression ();
3062 if (*input_line_pointer
!= ',')
3064 as_bad (_("missing value"));
3065 ignore_rest_of_line ();
3067 mri_comment_end (stop
, stopc
);
3071 ++input_line_pointer
;
3075 /* Skip any 0{letter} that may be present. Don't even check if the
3076 * letter is legal. */
3077 if (input_line_pointer
[0] == '0'
3078 && ISALPHA (input_line_pointer
[1]))
3079 input_line_pointer
+= 2;
3081 /* Accept :xxxx, where the x's are hex digits, for a floating point
3082 with the exact digits specified. */
3083 if (input_line_pointer
[0] == ':')
3085 flen
= hex_float (float_type
, temp
);
3088 ignore_rest_of_line ();
3090 mri_comment_end (stop
, stopc
);
3098 err
= md_atof (float_type
, temp
, &flen
);
3099 know (flen
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3103 as_bad (_("bad floating literal: %s"), err
);
3104 ignore_rest_of_line ();
3106 mri_comment_end (stop
, stopc
);
3111 while (--count
>= 0)
3115 p
= frag_more (flen
);
3116 memcpy (p
, temp
, (unsigned int) flen
);
3119 demand_empty_rest_of_line ();
3122 mri_comment_end (stop
, stopc
);
3125 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3128 s_struct (int ignore ATTRIBUTE_UNUSED
)
3134 stop
= mri_comment_field (&stopc
);
3135 abs_section_offset
= get_absolute_expression ();
3136 subseg_set (absolute_section
, 0);
3137 demand_empty_rest_of_line ();
3139 mri_comment_end (stop
, stopc
);
3143 s_text (int ignore ATTRIBUTE_UNUSED
)
3147 temp
= get_absolute_expression ();
3148 subseg_set (text_section
, (subsegT
) temp
);
3149 demand_empty_rest_of_line ();
3151 const_flag
&= ~IN_DEFAULT_SECTION
;
3155 /* .weakref x, y sets x as an alias to y that, as long as y is not
3156 referenced directly, will cause y to become a weak symbol. */
3158 s_weakref (int ignore ATTRIBUTE_UNUSED
)
3167 name
= input_line_pointer
;
3168 delim
= get_symbol_end ();
3169 end_name
= input_line_pointer
;
3171 if (name
== end_name
)
3173 as_bad (_("expected symbol name"));
3175 ignore_rest_of_line ();
3179 symbolP
= symbol_find_or_make (name
);
3181 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3183 as_bad (_("symbol `%s' is already defined"), name
);
3185 ignore_rest_of_line ();
3193 if (*input_line_pointer
!= ',')
3196 as_bad (_("expected comma after \"%s\""), name
);
3198 ignore_rest_of_line ();
3202 input_line_pointer
++;
3206 name
= input_line_pointer
;
3207 delim
= get_symbol_end ();
3208 end_name
= input_line_pointer
;
3210 if (name
== end_name
)
3212 as_bad (_("expected symbol name"));
3213 ignore_rest_of_line ();
3217 if ((symbolP2
= symbol_find_noref (name
, 1)) == NULL
3218 && (symbolP2
= md_undefined_symbol (name
)) == NULL
)
3220 symbolP2
= symbol_find_or_make (name
);
3221 S_SET_WEAKREFD (symbolP2
);
3225 symbolS
*symp
= symbolP2
;
3227 while (S_IS_WEAKREFR (symp
) && symp
!= symbolP
)
3229 expressionS
*expP
= symbol_get_value_expression (symp
);
3231 assert (expP
->X_op
== O_symbol
3232 && expP
->X_add_number
== 0);
3233 symp
= expP
->X_add_symbol
;
3235 if (symp
== symbolP
)
3239 loop
= concat (S_GET_NAME (symbolP
),
3240 " => ", S_GET_NAME (symbolP2
), NULL
);
3243 while (symp
!= symbolP
)
3245 char *old_loop
= loop
;
3246 symp
= symbol_get_value_expression (symp
)->X_add_symbol
;
3247 loop
= concat (loop
, " => ", S_GET_NAME (symp
), NULL
);
3251 as_bad (_("%s: would close weakref loop: %s"),
3252 S_GET_NAME (symbolP
), loop
);
3257 ignore_rest_of_line ();
3261 /* Short-circuiting instead of just checking here might speed
3262 things up a tiny little bit, but loop error messages would
3263 miss intermediate links. */
3264 /* symbolP2 = symp; */
3269 memset (&exp
, 0, sizeof (exp
));
3270 exp
.X_op
= O_symbol
;
3271 exp
.X_add_symbol
= symbolP2
;
3273 S_SET_SEGMENT (symbolP
, undefined_section
);
3274 symbol_set_value_expression (symbolP
, &exp
);
3275 symbol_set_frag (symbolP
, &zero_address_frag
);
3276 S_SET_WEAKREFR (symbolP
);
3278 demand_empty_rest_of_line ();
3282 /* Verify that we are at the end of a line. If not, issue an error and
3286 demand_empty_rest_of_line (void)
3289 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3290 input_line_pointer
++;
3293 if (ISPRINT (*input_line_pointer
))
3294 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3295 *input_line_pointer
);
3297 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3298 *input_line_pointer
);
3299 ignore_rest_of_line ();
3302 /* Return pointing just after end-of-line. */
3303 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3306 /* Silently advance to the end of line. Use this after already having
3307 issued an error about something bad. */
3310 ignore_rest_of_line (void)
3312 while (input_line_pointer
< buffer_limit
3313 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3314 input_line_pointer
++;
3316 input_line_pointer
++;
3318 /* Return pointing just after end-of-line. */
3319 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3322 /* Sets frag for given symbol to zero_address_frag, except when the
3323 symbol frag is already set to a dummy listing frag. */
3326 set_zero_frag (symbolS
*symbolP
)
3328 if (symbol_get_frag (symbolP
)->fr_type
!= rs_dummy
)
3329 symbol_set_frag (symbolP
, &zero_address_frag
);
3332 /* In: Pointer to a symbol.
3333 Input_line_pointer->expression.
3335 Out: Input_line_pointer->just after any whitespace after expression.
3336 Tried to set symbol to value of expression.
3337 Will change symbols type, value, and frag; */
3340 pseudo_set (symbolS
*symbolP
)
3345 know (symbolP
); /* NULL pointer is logic error. */
3347 if (!S_IS_FORWARD_REF (symbolP
))
3348 (void) expression (&exp
);
3350 (void) deferred_expression (&exp
);
3352 if (exp
.X_op
== O_illegal
)
3353 as_bad (_("illegal expression"));
3354 else if (exp
.X_op
== O_absent
)
3355 as_bad (_("missing expression"));
3356 else if (exp
.X_op
== O_big
)
3358 if (exp
.X_add_number
> 0)
3359 as_bad (_("bignum invalid"));
3361 as_bad (_("floating point number invalid"));
3363 else if (exp
.X_op
== O_subtract
3364 && !S_IS_FORWARD_REF (symbolP
)
3365 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
3366 && (symbol_get_frag (exp
.X_add_symbol
)
3367 == symbol_get_frag (exp
.X_op_symbol
)))
3369 exp
.X_op
= O_constant
;
3370 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
3371 - S_GET_VALUE (exp
.X_op_symbol
));
3374 if (symbol_section_p (symbolP
))
3376 as_bad ("attempt to set value of section symbol");
3385 exp
.X_add_number
= 0;
3388 S_SET_SEGMENT (symbolP
, absolute_section
);
3389 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3390 set_zero_frag (symbolP
);
3394 S_SET_SEGMENT (symbolP
, reg_section
);
3395 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3396 set_zero_frag (symbolP
);
3400 seg
= S_GET_SEGMENT (exp
.X_add_symbol
);
3401 /* For x=undef+const, create an expression symbol.
3402 For x=x+const, just update x except when x is an undefined symbol
3403 For x=defined+const, evaluate x. */
3404 if (symbolP
== exp
.X_add_symbol
3405 && (seg
!= undefined_section
3406 || !symbol_constant_p (symbolP
)))
3408 *symbol_X_add_number (symbolP
) += exp
.X_add_number
;
3411 else if (!S_IS_FORWARD_REF (symbolP
) && seg
!= undefined_section
)
3413 symbolS
*s
= exp
.X_add_symbol
;
3415 if (S_IS_COMMON (s
))
3416 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3417 S_GET_NAME (symbolP
), S_GET_NAME (s
));
3419 S_SET_SEGMENT (symbolP
, seg
);
3420 S_SET_VALUE (symbolP
, exp
.X_add_number
+ S_GET_VALUE (s
));
3421 symbol_set_frag (symbolP
, symbol_get_frag (s
));
3422 copy_symbol_attributes (symbolP
, s
);
3425 S_SET_SEGMENT (symbolP
, undefined_section
);
3426 symbol_set_value_expression (symbolP
, &exp
);
3427 set_zero_frag (symbolP
);
3431 /* The value is some complex expression. */
3432 S_SET_SEGMENT (symbolP
, expr_section
);
3433 symbol_set_value_expression (symbolP
, &exp
);
3434 set_zero_frag (symbolP
);
3441 CONStruct more frag of .bytes, or .words etc.
3442 Should need_pass_2 be 1 then emit no frag(s).
3443 This understands EXPRESSIONS.
3447 This has a split personality. We use expression() to read the
3448 value. We can detect if the value won't fit in a byte or word.
3449 But we can't detect if expression() discarded significant digits
3450 in the case of a long. Not worth the crocks required to fix it. */
3452 /* Select a parser for cons expressions. */
3454 /* Some targets need to parse the expression in various fancy ways.
3455 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3456 (for example, the HPPA does this). Otherwise, you can define
3457 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3458 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3459 are defined, which is the normal case, then only simple expressions
3464 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
3467 #ifndef TC_PARSE_CONS_EXPRESSION
3468 #ifdef BITFIELD_CONS_EXPRESSIONS
3469 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3471 parse_bitfield_cons (expressionS
*exp
, unsigned int nbytes
);
3473 #ifdef REPEAT_CONS_EXPRESSIONS
3474 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3476 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
3479 /* If we haven't gotten one yet, just call expression. */
3480 #ifndef TC_PARSE_CONS_EXPRESSION
3481 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3486 do_parse_cons_expression (expressionS
*exp
,
3487 int nbytes ATTRIBUTE_UNUSED
)
3489 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3493 /* Worker to do .byte etc statements.
3494 Clobbers input_line_pointer and checks end-of-line. */
3497 cons_worker (register int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
3505 #ifdef md_flush_pending_output
3506 md_flush_pending_output ();
3510 stop
= mri_comment_field (&stopc
);
3512 if (is_it_end_of_statement ())
3514 demand_empty_rest_of_line ();
3516 mri_comment_end (stop
, stopc
);
3520 #ifdef TC_ADDRESS_BYTES
3522 nbytes
= TC_ADDRESS_BYTES ();
3525 #ifdef md_cons_align
3526 md_cons_align (nbytes
);
3534 parse_mri_cons (&exp
, (unsigned int) nbytes
);
3537 TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
3541 if (exp
.X_op
== O_symbol
)
3542 exp
.X_op
= O_symbol_rva
;
3544 as_fatal (_("rva without symbol"));
3546 emit_expr (&exp
, (unsigned int) nbytes
);
3549 while (*input_line_pointer
++ == ',');
3551 /* In MRI mode, after an odd number of bytes, we must align to an
3552 even word boundary, unless the next instruction is a dc.b, ds.b
3554 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
3555 mri_pending_align
= 1;
3557 input_line_pointer
--; /* Put terminator back into stream. */
3559 demand_empty_rest_of_line ();
3562 mri_comment_end (stop
, stopc
);
3568 cons_worker (size
, 0);
3574 cons_worker (size
, 1);
3577 /* Put the contents of expression EXP into the object file using
3578 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3581 emit_expr (expressionS
*exp
, unsigned int nbytes
)
3585 valueT extra_digit
= 0;
3587 /* Don't do anything if we are going to make another pass. */
3591 dot_value
= frag_now_fix ();
3595 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3596 appear as a four byte positive constant in the .line section,
3597 followed by a 2 byte 0xffff. Look for that case here. */
3599 static int dwarf_line
= -1;
3601 if (strcmp (segment_name (now_seg
), ".line") != 0)
3603 else if (dwarf_line
>= 0
3605 && exp
->X_op
== O_constant
3606 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
3607 listing_source_line ((unsigned int) dwarf_line
);
3608 else if (nbytes
== 4
3609 && exp
->X_op
== O_constant
3610 && exp
->X_add_number
>= 0)
3611 dwarf_line
= exp
->X_add_number
;
3616 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3617 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3618 AT_sibling (0x12) followed by a four byte address of the sibling
3619 followed by a 2 byte AT_name (0x38) followed by the name of the
3620 file. We look for that case here. */
3622 static int dwarf_file
= 0;
3624 if (strcmp (segment_name (now_seg
), ".debug") != 0)
3626 else if (dwarf_file
== 0
3628 && exp
->X_op
== O_constant
3629 && exp
->X_add_number
== 0x11)
3631 else if (dwarf_file
== 1
3633 && exp
->X_op
== O_constant
3634 && exp
->X_add_number
== 0x12)
3636 else if (dwarf_file
== 2
3639 else if (dwarf_file
== 3
3641 && exp
->X_op
== O_constant
3642 && exp
->X_add_number
== 0x38)
3647 /* The variable dwarf_file_string tells stringer that the string
3648 may be the name of the source file. */
3649 if (dwarf_file
== 4)
3650 dwarf_file_string
= 1;
3652 dwarf_file_string
= 0;
3657 if (check_eh_frame (exp
, &nbytes
))
3662 /* Allow `.word 0' in the absolute section. */
3663 if (now_seg
== absolute_section
)
3665 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
3666 as_bad (_("attempt to store value in absolute section"));
3667 abs_section_offset
+= nbytes
;
3671 /* Handle a negative bignum. */
3673 && exp
->X_add_number
== 0
3674 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
3675 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
3678 unsigned long carry
;
3680 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
3682 /* Negate the bignum: one's complement each digit and add 1. */
3684 for (i
= 0; i
< exp
->X_add_number
; i
++)
3688 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
3691 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
3692 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
3695 /* We can ignore any carry out, because it will be handled by
3696 extra_digit if it is needed. */
3698 extra_digit
= (valueT
) -1;
3702 if (op
== O_absent
|| op
== O_illegal
)
3704 as_warn (_("zero assumed for missing expression"));
3705 exp
->X_add_number
= 0;
3708 else if (op
== O_big
&& exp
->X_add_number
<= 0)
3710 as_bad (_("floating point number invalid"));
3711 exp
->X_add_number
= 0;
3714 else if (op
== O_register
)
3716 as_warn (_("register value used as expression"));
3720 p
= frag_more ((int) nbytes
);
3722 #ifndef WORKING_DOT_WORD
3723 /* If we have the difference of two symbols in a word, save it on
3724 the broken_words list. See the code in write.c. */
3725 if (op
== O_subtract
&& nbytes
== 2)
3727 struct broken_word
*x
;
3729 x
= (struct broken_word
*) xmalloc (sizeof (struct broken_word
));
3730 x
->next_broken_word
= broken_words
;
3733 x
->subseg
= now_subseg
;
3735 x
->word_goes_here
= p
;
3737 x
->add
= exp
->X_add_symbol
;
3738 x
->sub
= exp
->X_op_symbol
;
3739 x
->addnum
= exp
->X_add_number
;
3747 /* If we have an integer, but the number of bytes is too large to
3748 pass to md_number_to_chars, handle it as a bignum. */
3749 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
3751 extra_digit
= exp
->X_unsigned
? 0 : -1;
3752 convert_to_bignum (exp
);
3756 if (op
== O_constant
)
3758 register valueT get
;
3759 register valueT use
;
3760 register valueT mask
;
3762 register valueT unmask
;
3764 /* JF << of >= number of bits in the object is undefined. In
3765 particular SPARC (Sun 4) has problems. */
3766 if (nbytes
>= sizeof (valueT
))
3769 if (nbytes
> sizeof (valueT
))
3772 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
3776 /* Don't store these bits. */
3777 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
3778 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
3781 unmask
= ~mask
; /* Do store these bits. */
3784 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3785 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
3788 get
= exp
->X_add_number
;
3790 if ((get
& mask
) != 0
3791 && ((get
& mask
) != mask
3792 || (get
& hibit
) == 0))
3793 { /* Leading bits contain both 0s & 1s. */
3794 as_warn (_("value 0x%lx truncated to 0x%lx"),
3795 (unsigned long) get
, (unsigned long) use
);
3797 /* Put bytes in right order. */
3798 md_number_to_chars (p
, use
, (int) nbytes
);
3800 else if (op
== O_big
)
3803 LITTLENUM_TYPE
*nums
;
3805 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
3807 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
3810 as_warn (_("bignum truncated to %d bytes"), nbytes
);
3814 if (target_big_endian
)
3816 while (nbytes
> size
)
3818 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
3819 nbytes
-= CHARS_PER_LITTLENUM
;
3820 p
+= CHARS_PER_LITTLENUM
;
3823 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
3824 while (size
>= CHARS_PER_LITTLENUM
)
3827 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
3828 size
-= CHARS_PER_LITTLENUM
;
3829 p
+= CHARS_PER_LITTLENUM
;
3834 nums
= generic_bignum
;
3835 while (size
>= CHARS_PER_LITTLENUM
)
3837 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
3839 size
-= CHARS_PER_LITTLENUM
;
3840 p
+= CHARS_PER_LITTLENUM
;
3841 nbytes
-= CHARS_PER_LITTLENUM
;
3844 while (nbytes
>= CHARS_PER_LITTLENUM
)
3846 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
3847 nbytes
-= CHARS_PER_LITTLENUM
;
3848 p
+= CHARS_PER_LITTLENUM
;
3854 memset (p
, 0, nbytes
);
3856 /* Now we need to generate a fixS to record the symbol value. */
3858 #ifdef TC_CONS_FIX_NEW
3859 TC_CONS_FIX_NEW (frag_now
, p
- frag_now
->fr_literal
, nbytes
, exp
);
3862 bfd_reloc_code_real_type r
;
3879 as_bad (_("unsupported BFD relocation size %u"), nbytes
);
3883 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, (int) nbytes
, exp
,
3890 #ifdef BITFIELD_CONS_EXPRESSIONS
3892 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3893 w:x,y:z, where w and y are bitwidths and x and y are values. They
3894 then pack them all together. We do a little better in that we allow
3895 them in words, longs, etc. and we'll pack them in target byte order
3898 The rules are: pack least significant bit first, if a field doesn't
3899 entirely fit, put it in the next unit. Overflowing the bitfield is
3900 explicitly *not* even a warning. The bitwidth should be considered
3903 To use this function the tc-XXX.h file should define
3904 BITFIELD_CONS_EXPRESSIONS. */
3907 parse_bitfield_cons (exp
, nbytes
)
3909 unsigned int nbytes
;
3911 unsigned int bits_available
= BITS_PER_CHAR
* nbytes
;
3912 char *hold
= input_line_pointer
;
3914 (void) expression (exp
);
3916 if (*input_line_pointer
== ':')
3923 unsigned long width
;
3925 if (*input_line_pointer
!= ':')
3927 input_line_pointer
= hold
;
3929 } /* Next piece is not a bitfield. */
3931 /* In the general case, we can't allow
3932 full expressions with symbol
3933 differences and such. The relocation
3934 entries for symbols not defined in this
3935 assembly would require arbitrary field
3936 widths, positions, and masks which most
3937 of our current object formats don't
3940 In the specific case where a symbol
3941 *is* defined in this assembly, we
3942 *could* build fixups and track it, but
3943 this could lead to confusion for the
3944 backends. I'm lazy. I'll take any
3945 SEG_ABSOLUTE. I think that means that
3946 you can use a previous .set or
3947 .equ type symbol. xoxorich. */
3949 if (exp
->X_op
== O_absent
)
3951 as_warn (_("using a bit field width of zero"));
3952 exp
->X_add_number
= 0;
3953 exp
->X_op
= O_constant
;
3954 } /* Implied zero width bitfield. */
3956 if (exp
->X_op
!= O_constant
)
3958 *input_line_pointer
= '\0';
3959 as_bad (_("field width \"%s\" too complex for a bitfield"), hold
);
3960 *input_line_pointer
= ':';
3961 demand_empty_rest_of_line ();
3963 } /* Too complex. */
3965 if ((width
= exp
->X_add_number
) > (BITS_PER_CHAR
* nbytes
))
3967 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
3968 width
, nbytes
, (BITS_PER_CHAR
* nbytes
));
3969 width
= BITS_PER_CHAR
* nbytes
;
3972 if (width
> bits_available
)
3974 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
3975 input_line_pointer
= hold
;
3976 exp
->X_add_number
= value
;
3981 hold
= ++input_line_pointer
;
3983 (void) expression (exp
);
3984 if (exp
->X_op
!= O_constant
)
3986 char cache
= *input_line_pointer
;
3988 *input_line_pointer
= '\0';
3989 as_bad (_("field value \"%s\" too complex for a bitfield"), hold
);
3990 *input_line_pointer
= cache
;
3991 demand_empty_rest_of_line ();
3993 } /* Too complex. */
3995 value
|= ((~(-1 << width
) & exp
->X_add_number
)
3996 << ((BITS_PER_CHAR
* nbytes
) - bits_available
));
3998 if ((bits_available
-= width
) == 0
3999 || is_it_end_of_statement ()
4000 || *input_line_pointer
!= ',')
4003 } /* All the bitfields we're gonna get. */
4005 hold
= ++input_line_pointer
;
4006 (void) expression (exp
);
4009 exp
->X_add_number
= value
;
4010 exp
->X_op
= O_constant
;
4011 exp
->X_unsigned
= 1;
4015 #endif /* BITFIELD_CONS_EXPRESSIONS */
4017 /* Handle an MRI style string expression. */
4021 parse_mri_cons (exp
, nbytes
)
4023 unsigned int nbytes
;
4025 if (*input_line_pointer
!= '\''
4026 && (input_line_pointer
[1] != '\''
4027 || (*input_line_pointer
!= 'A'
4028 && *input_line_pointer
!= 'E')))
4029 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
4033 unsigned int result
= 0;
4035 /* An MRI style string. Cut into as many bytes as will fit into
4036 a nbyte chunk, left justify if necessary, and separate with
4037 commas so we can try again later. */
4038 if (*input_line_pointer
== 'A')
4039 ++input_line_pointer
;
4040 else if (*input_line_pointer
== 'E')
4042 as_bad (_("EBCDIC constants are not supported"));
4043 ++input_line_pointer
;
4046 input_line_pointer
++;
4047 for (scan
= 0; scan
< nbytes
; scan
++)
4049 if (*input_line_pointer
== '\'')
4051 if (input_line_pointer
[1] == '\'')
4053 input_line_pointer
++;
4058 result
= (result
<< 8) | (*input_line_pointer
++);
4062 while (scan
< nbytes
)
4068 /* Create correct expression. */
4069 exp
->X_op
= O_constant
;
4070 exp
->X_add_number
= result
;
4072 /* Fake it so that we can read the next char too. */
4073 if (input_line_pointer
[0] != '\'' ||
4074 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
4076 input_line_pointer
-= 2;
4077 input_line_pointer
[0] = ',';
4078 input_line_pointer
[1] = '\'';
4081 input_line_pointer
++;
4084 #endif /* TC_M68K */
4086 #ifdef REPEAT_CONS_EXPRESSIONS
4088 /* Parse a repeat expression for cons. This is used by the MIPS
4089 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4090 object file COUNT times.
4092 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4095 parse_repeat_cons (exp
, nbytes
)
4097 unsigned int nbytes
;
4104 if (*input_line_pointer
!= ':')
4106 /* No repeat count. */
4110 ++input_line_pointer
;
4111 expression (&count
);
4112 if (count
.X_op
!= O_constant
4113 || count
.X_add_number
<= 0)
4115 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4119 /* The cons function is going to output this expression once. So we
4120 output it count - 1 times. */
4121 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
4122 emit_expr (exp
, nbytes
);
4125 #endif /* REPEAT_CONS_EXPRESSIONS */
4127 /* Parse a floating point number represented as a hex constant. This
4128 permits users to specify the exact bits they want in the floating
4132 hex_float (int float_type
, char *bytes
)
4164 as_bad (_("unknown floating type type '%c'"), float_type
);
4168 /* It would be nice if we could go through expression to parse the
4169 hex constant, but if we get a bignum it's a pain to sort it into
4170 the buffer correctly. */
4172 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4176 /* The MRI assembler accepts arbitrary underscores strewn about
4177 through the hex constant, so we ignore them as well. */
4178 if (*input_line_pointer
== '_')
4180 ++input_line_pointer
;
4186 as_warn (_("floating point constant too large"));
4189 d
= hex_value (*input_line_pointer
) << 4;
4190 ++input_line_pointer
;
4191 while (*input_line_pointer
== '_')
4192 ++input_line_pointer
;
4193 if (hex_p (*input_line_pointer
))
4195 d
+= hex_value (*input_line_pointer
);
4196 ++input_line_pointer
;
4198 if (target_big_endian
)
4201 bytes
[length
- i
- 1] = d
;
4207 if (target_big_endian
)
4208 memset (bytes
+ i
, 0, length
- i
);
4210 memset (bytes
, 0, length
- i
);
4218 CONStruct some more frag chars of .floats .ffloats etc.
4219 Makes 0 or more new frags.
4220 If need_pass_2 == 1, no frags are emitted.
4221 This understands only floating literals, not expressions. Sorry.
4223 A floating constant is defined by atof_generic(), except it is preceded
4224 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4225 reading, I decided to be incompatible. This always tries to give you
4226 rounded bits to the precision of the pseudo-op. Former AS did premature
4227 truncation, restored noisy bits instead of trailing 0s AND gave you
4228 a choice of 2 flavours of noise according to which of 2 floating-point
4229 scanners you directed AS to use.
4231 In: input_line_pointer->whitespace before, or '0' of flonum. */
4234 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4235 register int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4238 int length
; /* Number of chars in an object. */
4239 register char *err
; /* Error from scanning floating literal. */
4240 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4242 if (is_it_end_of_statement ())
4244 demand_empty_rest_of_line ();
4248 #ifdef md_flush_pending_output
4249 md_flush_pending_output ();
4254 /* input_line_pointer->1st char of a flonum (we hope!). */
4257 /* Skip any 0{letter} that may be present. Don't even check if the
4258 letter is legal. Someone may invent a "z" format and this routine
4259 has no use for such information. Lusers beware: you get
4260 diagnostics if your input is ill-conditioned. */
4261 if (input_line_pointer
[0] == '0'
4262 && ISALPHA (input_line_pointer
[1]))
4263 input_line_pointer
+= 2;
4265 /* Accept :xxxx, where the x's are hex digits, for a floating
4266 point with the exact digits specified. */
4267 if (input_line_pointer
[0] == ':')
4269 ++input_line_pointer
;
4270 length
= hex_float (float_type
, temp
);
4273 ignore_rest_of_line ();
4279 err
= md_atof (float_type
, temp
, &length
);
4280 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
4284 as_bad (_("bad floating literal: %s"), err
);
4285 ignore_rest_of_line ();
4296 #ifdef REPEAT_CONS_EXPRESSIONS
4297 if (*input_line_pointer
== ':')
4299 expressionS count_exp
;
4301 ++input_line_pointer
;
4302 expression (&count_exp
);
4304 if (count_exp
.X_op
!= O_constant
4305 || count_exp
.X_add_number
<= 0)
4306 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4308 count
= count_exp
.X_add_number
;
4312 while (--count
>= 0)
4314 p
= frag_more (length
);
4315 memcpy (p
, temp
, (unsigned int) length
);
4320 while (*input_line_pointer
++ == ',');
4322 /* Put terminator back into stream. */
4323 --input_line_pointer
;
4324 demand_empty_rest_of_line ();
4327 /* Return the size of a LEB128 value. */
4330 sizeof_sleb128 (offsetT value
)
4332 register int size
= 0;
4333 register unsigned byte
;
4337 byte
= (value
& 0x7f);
4338 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4339 Fortunately, we can structure things so that the extra work reduces
4340 to a noop on systems that do things "properly". */
4341 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4344 while (!(((value
== 0) && ((byte
& 0x40) == 0))
4345 || ((value
== -1) && ((byte
& 0x40) != 0))));
4351 sizeof_uleb128 (valueT value
)
4353 register int size
= 0;
4354 register unsigned byte
;
4358 byte
= (value
& 0x7f);
4368 sizeof_leb128 (valueT value
, int sign
)
4371 return sizeof_sleb128 ((offsetT
) value
);
4373 return sizeof_uleb128 (value
);
4376 /* Output a LEB128 value. */
4379 output_sleb128 (char *p
, offsetT value
)
4381 register char *orig
= p
;
4386 unsigned byte
= (value
& 0x7f);
4388 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4389 Fortunately, we can structure things so that the extra work reduces
4390 to a noop on systems that do things "properly". */
4391 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4393 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
4394 || ((value
== -1) && ((byte
& 0x40) != 0))));
4406 output_uleb128 (char *p
, valueT value
)
4412 unsigned byte
= (value
& 0x7f);
4415 /* More bytes to follow. */
4426 output_leb128 (char *p
, valueT value
, int sign
)
4429 return output_sleb128 (p
, (offsetT
) value
);
4431 return output_uleb128 (p
, value
);
4434 /* Do the same for bignums. We combine sizeof with output here in that
4435 we don't output for NULL values of P. It isn't really as critical as
4436 for "normal" values that this be streamlined. */
4439 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4446 /* Strip leading sign extensions off the bignum. */
4448 && bignum
[size
- 1] == LITTLENUM_MASK
4449 && bignum
[size
- 2] > LITTLENUM_MASK
/ 2)
4454 /* OR in the next part of the littlenum. */
4455 val
|= (*bignum
<< loaded
);
4456 loaded
+= LITTLENUM_NUMBER_OF_BITS
;
4460 /* Add bytes until there are less than 7 bits left in VAL
4461 or until every non-sign bit has been written. */
4468 || val
!= ((byte
& 0x40) == 0 ? 0 : ((valueT
) 1 << loaded
) - 1))
4475 while ((byte
& 0x80) != 0 && loaded
>= 7);
4479 /* Mop up any left-over bits (of which there will be less than 7). */
4480 if ((byte
& 0x80) != 0)
4482 /* Sign-extend VAL. */
4483 if (val
& (1 << (loaded
- 1)))
4484 val
|= ~0 << loaded
;
4494 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4501 /* Strip leading zeros off the bignum. */
4502 /* XXX: Is this needed? */
4503 while (size
> 0 && bignum
[size
- 1] == 0)
4508 if (loaded
< 7 && size
> 0)
4510 val
|= (*bignum
<< loaded
);
4511 loaded
+= 8 * CHARS_PER_LITTLENUM
;
4520 if (size
> 0 || val
)
4527 while (byte
& 0x80);
4533 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
, int sign
)
4536 return output_big_sleb128 (p
, bignum
, size
);
4538 return output_big_uleb128 (p
, bignum
, size
);
4541 /* Generate the appropriate fragments for a given expression to emit a
4545 emit_leb128_expr (expressionS
*exp
, int sign
)
4547 operatorT op
= exp
->X_op
;
4548 unsigned int nbytes
;
4550 if (op
== O_absent
|| op
== O_illegal
)
4552 as_warn (_("zero assumed for missing expression"));
4553 exp
->X_add_number
= 0;
4556 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4558 as_bad (_("floating point number invalid"));
4559 exp
->X_add_number
= 0;
4562 else if (op
== O_register
)
4564 as_warn (_("register value used as expression"));
4567 else if (op
== O_constant
4569 && (exp
->X_add_number
< 0) != !exp
->X_unsigned
)
4571 /* We're outputting a signed leb128 and the sign of X_add_number
4572 doesn't reflect the sign of the original value. Convert EXP
4573 to a correctly-extended bignum instead. */
4574 convert_to_bignum (exp
);
4578 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
4579 a signal that this is leb128 data. It shouldn't optimize this away. */
4580 nbytes
= (unsigned int) -1;
4581 if (check_eh_frame (exp
, &nbytes
))
4584 /* Let the backend know that subsequent data may be byte aligned. */
4585 #ifdef md_cons_align
4589 if (op
== O_constant
)
4591 /* If we've got a constant, emit the thing directly right now. */
4593 valueT value
= exp
->X_add_number
;
4597 size
= sizeof_leb128 (value
, sign
);
4598 p
= frag_more (size
);
4599 output_leb128 (p
, value
, sign
);
4601 else if (op
== O_big
)
4603 /* O_big is a different sort of constant. */
4608 size
= output_big_leb128 (NULL
, generic_bignum
, exp
->X_add_number
, sign
);
4609 p
= frag_more (size
);
4610 output_big_leb128 (p
, generic_bignum
, exp
->X_add_number
, sign
);
4614 /* Otherwise, we have to create a variable sized fragment and
4615 resolve things later. */
4617 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
4618 make_expr_symbol (exp
), 0, (char *) NULL
);
4622 /* Parse the .sleb128 and .uleb128 pseudos. */
4629 #ifdef md_flush_pending_output
4630 md_flush_pending_output ();
4636 emit_leb128_expr (&exp
, sign
);
4638 while (*input_line_pointer
++ == ',');
4640 input_line_pointer
--;
4641 demand_empty_rest_of_line ();
4644 /* We read 0 or more ',' separated, double-quoted strings.
4645 Caller should have checked need_pass_2 is FALSE because we don't
4649 stringer (/* Worker to do .ascii etc statements. */
4650 /* Checks end-of-line. */
4651 register int append_zero
/* 0: don't append '\0', else 1. */)
4653 register unsigned int c
;
4656 #ifdef md_flush_pending_output
4657 md_flush_pending_output ();
4660 /* The following awkward logic is to parse ZERO or more strings,
4661 comma separated. Recall a string expression includes spaces
4662 before the opening '\"' and spaces after the closing '\"'.
4663 We fake a leading ',' if there is (supposed to be)
4664 a 1st, expression. We keep demanding expressions for each ','. */
4665 if (is_it_end_of_statement ())
4667 c
= 0; /* Skip loop. */
4668 ++input_line_pointer
; /* Compensate for end of loop. */
4672 c
= ','; /* Do loop. */
4674 /* If we have been switched into the abs_section then we
4675 will not have an obstack onto which we can hang strings. */
4676 if (now_seg
== absolute_section
)
4678 as_bad (_("strings must be placed into a section"));
4680 ignore_rest_of_line ();
4683 while (c
== ',' || c
== '<' || c
== '"')
4686 switch (*input_line_pointer
)
4689 ++input_line_pointer
; /*->1st char of string. */
4690 start
= input_line_pointer
;
4691 while (is_a_char (c
= next_char_of_string ()))
4693 FRAG_APPEND_1_CHAR (c
);
4697 FRAG_APPEND_1_CHAR (0);
4699 know (input_line_pointer
[-1] == '\"');
4703 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
4704 will emit .string with a filename in the .debug section
4705 after a sequence of constants. See the comment in
4706 emit_expr for the sequence. emit_expr will set
4707 dwarf_file_string to non-zero if this string might be a
4708 source file name. */
4709 if (strcmp (segment_name (now_seg
), ".debug") != 0)
4710 dwarf_file_string
= 0;
4711 else if (dwarf_file_string
)
4713 c
= input_line_pointer
[-1];
4714 input_line_pointer
[-1] = '\0';
4715 listing_source_file (start
);
4716 input_line_pointer
[-1] = c
;
4723 input_line_pointer
++;
4724 c
= get_single_number ();
4725 FRAG_APPEND_1_CHAR (c
);
4726 if (*input_line_pointer
!= '>')
4728 as_bad (_("expected <nn>"));
4730 input_line_pointer
++;
4733 input_line_pointer
++;
4737 c
= *input_line_pointer
;
4740 demand_empty_rest_of_line ();
4743 /* FIXME-SOMEDAY: I had trouble here on characters with the
4744 high bits set. We'll probably also have trouble with
4745 multibyte chars, wide chars, etc. Also be careful about
4746 returning values bigger than 1 byte. xoxorich. */
4749 next_char_of_string (void)
4751 register unsigned int c
;
4753 c
= *input_line_pointer
++ & CHAR_MASK
;
4761 as_warn (_("unterminated string; newline inserted"));
4762 bump_line_counters ();
4765 #ifndef NO_STRING_ESCAPES
4767 switch (c
= *input_line_pointer
++)
4795 break; /* As itself. */
4811 for (i
= 0, number
= 0;
4812 ISDIGIT (c
) && i
< 3;
4813 c
= *input_line_pointer
++, i
++)
4815 number
= number
* 8 + c
- '0';
4820 --input_line_pointer
;
4829 c
= *input_line_pointer
++;
4830 while (ISXDIGIT (c
))
4833 number
= number
* 16 + c
- '0';
4834 else if (ISUPPER (c
))
4835 number
= number
* 16 + c
- 'A' + 10;
4837 number
= number
* 16 + c
- 'a' + 10;
4838 c
= *input_line_pointer
++;
4841 --input_line_pointer
;
4846 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
4847 as_warn (_("unterminated string; newline inserted"));
4849 bump_line_counters ();
4854 #ifdef ONLY_STANDARD_ESCAPES
4855 as_bad (_("bad escaped character in string"));
4857 #endif /* ONLY_STANDARD_ESCAPES */
4862 #endif /* ! defined (NO_STRING_ESCAPES) */
4871 get_segmented_expression (register expressionS
*expP
)
4873 register segT retval
;
4875 retval
= expression (expP
);
4876 if (expP
->X_op
== O_illegal
4877 || expP
->X_op
== O_absent
4878 || expP
->X_op
== O_big
)
4880 as_bad (_("expected address expression"));
4881 expP
->X_op
= O_constant
;
4882 expP
->X_add_number
= 0;
4883 retval
= absolute_section
;
4889 get_known_segmented_expression (register expressionS
*expP
)
4891 register segT retval
;
4893 if ((retval
= get_segmented_expression (expP
)) == undefined_section
)
4895 /* There is no easy way to extract the undefined symbol from the
4897 if (expP
->X_add_symbol
!= NULL
4898 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
4899 as_warn (_("symbol \"%s\" undefined; zero assumed"),
4900 S_GET_NAME (expP
->X_add_symbol
));
4902 as_warn (_("some symbol undefined; zero assumed"));
4903 retval
= absolute_section
;
4904 expP
->X_op
= O_constant
;
4905 expP
->X_add_number
= 0;
4907 know (retval
== absolute_section
|| SEG_NORMAL (retval
));
4911 char /* Return terminator. */
4912 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
4914 /* FIXME: val_pointer should probably be offsetT *. */
4915 *val_pointer
= (long) get_absolute_expression ();
4916 return (*input_line_pointer
++);
4919 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
4920 Give a warning if that happens. */
4923 demand_copy_C_string (int *len_pointer
)
4927 if ((s
= demand_copy_string (len_pointer
)) != 0)
4931 for (len
= *len_pointer
; len
> 0; len
--)
4938 as_bad (_("this string may not contain \'\\0\'"));
4946 /* Demand string, but return a safe (=private) copy of the string.
4947 Return NULL if we can't read a string here. */
4950 demand_copy_string (int *lenP
)
4952 register unsigned int c
;
4958 if (*input_line_pointer
== '\"')
4960 input_line_pointer
++; /* Skip opening quote. */
4962 while (is_a_char (c
= next_char_of_string ()))
4964 obstack_1grow (¬es
, c
);
4967 /* JF this next line is so demand_copy_C_string will return a
4968 null terminated string. */
4969 obstack_1grow (¬es
, '\0');
4970 retval
= obstack_finish (¬es
);
4974 as_bad (_("missing string"));
4976 ignore_rest_of_line ();
4982 /* In: Input_line_pointer->next character.
4984 Do: Skip input_line_pointer over all whitespace.
4986 Out: 1 if input_line_pointer->end-of-line. */
4989 is_it_end_of_statement (void)
4992 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
4996 equals (char *sym_name
, int reassign
)
5001 input_line_pointer
++;
5002 if (*input_line_pointer
== '=')
5003 input_line_pointer
++;
5004 if (reassign
< 0 && *input_line_pointer
== '=')
5005 input_line_pointer
++;
5007 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
5008 input_line_pointer
++;
5011 stop
= mri_comment_field (&stopc
);
5013 assign_symbol (sym_name
, reassign
>= 0 ? !reassign
: reassign
);
5017 demand_empty_rest_of_line ();
5018 mri_comment_end (stop
, stopc
);
5022 /* .incbin -- include a file verbatim at the current location. */
5025 s_incbin (int x ATTRIBUTE_UNUSED
)
5036 #ifdef md_flush_pending_output
5037 md_flush_pending_output ();
5041 filename
= demand_copy_string (& len
);
5042 if (filename
== NULL
)
5047 /* Look for optional skip and count. */
5048 if (* input_line_pointer
== ',')
5050 ++ input_line_pointer
;
5051 skip
= get_absolute_expression ();
5055 if (* input_line_pointer
== ',')
5057 ++ input_line_pointer
;
5059 count
= get_absolute_expression ();
5061 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
5067 demand_empty_rest_of_line ();
5069 /* Try opening absolute path first, then try include dirs. */
5070 binfile
= fopen (filename
, FOPEN_RB
);
5071 if (binfile
== NULL
)
5075 path
= xmalloc ((unsigned long) len
+ include_dir_maxlen
+ 5);
5077 for (i
= 0; i
< include_dir_count
; i
++)
5079 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
5081 binfile
= fopen (path
, FOPEN_RB
);
5082 if (binfile
!= NULL
)
5086 if (binfile
== NULL
)
5087 as_bad (_("file not found: %s"), filename
);
5090 path
= xstrdup (filename
);
5096 register_dependency (path
);
5098 /* Compute the length of the file. */
5099 if (fseek (binfile
, 0, SEEK_END
) != 0)
5101 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
5104 file_len
= ftell (binfile
);
5106 /* If a count was not specified use the remainder of the file. */
5108 count
= file_len
- skip
;
5110 if (skip
< 0 || count
< 0 || file_len
< 0 || skip
+ count
> file_len
)
5112 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5113 skip
, count
, file_len
);
5117 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
5119 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
5123 /* Allocate frag space and store file contents in it. */
5124 binfrag
= frag_more (count
);
5126 bytes
= fread (binfrag
, 1, count
, binfile
);
5128 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5129 path
, bytes
, count
);
5132 if (binfile
!= NULL
)
5138 /* .include -- include a file at this point. */
5141 s_include (int arg ATTRIBUTE_UNUSED
)
5150 filename
= demand_copy_string (&i
);
5151 if (filename
== NULL
)
5153 /* demand_copy_string has already printed an error and
5154 called ignore_rest_of_line. */
5162 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
5163 && *input_line_pointer
!= ' '
5164 && *input_line_pointer
!= '\t')
5166 obstack_1grow (¬es
, *input_line_pointer
);
5167 ++input_line_pointer
;
5171 obstack_1grow (¬es
, '\0');
5172 filename
= obstack_finish (¬es
);
5173 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5174 ++input_line_pointer
;
5177 demand_empty_rest_of_line ();
5178 path
= xmalloc ((unsigned long) i
+ include_dir_maxlen
+ 5 /* slop */ );
5180 for (i
= 0; i
< include_dir_count
; i
++)
5182 strcpy (path
, include_dirs
[i
]);
5184 strcat (path
, filename
);
5185 if (0 != (try = fopen (path
, FOPEN_RT
)))
5195 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5196 register_dependency (path
);
5197 input_scrub_insert_file (path
);
5201 add_include_dir (char *path
)
5205 if (include_dir_count
== 0)
5207 include_dirs
= (char **) xmalloc (2 * sizeof (*include_dirs
));
5208 include_dirs
[0] = "."; /* Current dir. */
5209 include_dir_count
= 2;
5213 include_dir_count
++;
5215 (char **) realloc (include_dirs
,
5216 include_dir_count
* sizeof (*include_dirs
));
5219 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
5222 if (i
> include_dir_maxlen
)
5223 include_dir_maxlen
= i
;
5226 /* Output debugging information to denote the source file. */
5229 generate_file_debug (void)
5231 if (debug_type
== DEBUG_STABS
)
5232 stabs_generate_asm_file ();
5235 /* Output line number debugging information for the current source line. */
5238 generate_lineno_debug (void)
5242 case DEBUG_UNSPECIFIED
:
5247 stabs_generate_asm_lineno ();
5250 ecoff_generate_asm_lineno ();
5253 /* ??? We could here indicate to dwarf2dbg.c that something
5254 has changed. However, since there is additional backend
5255 support that is required (calling dwarf2_emit_insn), we
5256 let dwarf2dbg.c call as_where on its own. */
5261 /* Output debugging information to mark a function entry point or end point.
5262 END_P is zero for .func, and non-zero for .endfunc. */
5267 do_s_func (end_p
, NULL
);
5270 /* Subroutine of s_func so targets can choose a different default prefix.
5271 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5274 do_s_func (int end_p
, const char *default_prefix
)
5276 /* Record the current function so that we can issue an error message for
5277 misplaced .func,.endfunc, and also so that .endfunc needs no
5279 static char *current_name
;
5280 static char *current_label
;
5284 if (current_name
== NULL
)
5286 as_bad (_("missing .func"));
5287 ignore_rest_of_line ();
5291 if (debug_type
== DEBUG_STABS
)
5292 stabs_generate_asm_endfunc (current_name
, current_label
);
5294 current_name
= current_label
= NULL
;
5299 char delim1
, delim2
;
5301 if (current_name
!= NULL
)
5303 as_bad (_(".endfunc missing for previous .func"));
5304 ignore_rest_of_line ();
5308 name
= input_line_pointer
;
5309 delim1
= get_symbol_end ();
5310 name
= xstrdup (name
);
5311 *input_line_pointer
= delim1
;
5313 if (*input_line_pointer
!= ',')
5316 asprintf (&label
, "%s%s", default_prefix
, name
);
5319 char leading_char
= bfd_get_symbol_leading_char (stdoutput
);
5320 /* Missing entry point, use function's name with the leading
5323 asprintf (&label
, "%c%s", leading_char
, name
);
5330 ++input_line_pointer
;
5332 label
= input_line_pointer
;
5333 delim2
= get_symbol_end ();
5334 label
= xstrdup (label
);
5335 *input_line_pointer
= delim2
;
5338 if (debug_type
== DEBUG_STABS
)
5339 stabs_generate_asm_func (name
, label
);
5341 current_name
= name
;
5342 current_label
= label
;
5345 demand_empty_rest_of_line ();
5349 s_ignore (int arg ATTRIBUTE_UNUSED
)
5351 ignore_rest_of_line ();
5355 read_print_statistics (FILE *file
)
5357 hash_print_statistics (file
, "pseudo-op table", po_hash
);
5360 /* Inserts the given line into the input stream.
5362 This call avoids macro/conditionals nesting checking, since the contents of
5363 the line are assumed to replace the contents of a line already scanned.
5365 An appropriate use of this function would be substitution of input lines when
5366 called by md_start_line_hook(). The given line is assumed to already be
5367 properly scrubbed. */
5370 input_scrub_insert_line (const char *line
)
5374 sb_add_string (&newline
, line
);
5375 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
5377 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5380 /* Insert a file into the input stream; the path must resolve to an actual
5381 file; no include path searching or dependency registering is performed. */
5384 input_scrub_insert_file (char *path
)
5386 input_scrub_include_file (path
, input_line_pointer
);
5387 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5390 /* Find the end of a line, considering quotation and escaping of quotes. */
5392 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5393 # define TC_SINGLE_QUOTE_STRINGS 1
5397 _find_end_of_line (char *s
, int mri_string
, int insn ATTRIBUTE_UNUSED
)
5399 char inquote
= '\0';
5402 while (!is_end_of_line
[(unsigned char) *s
]
5403 || (inquote
&& !ISCNTRL (*s
))
5404 || (inquote
== '\'' && flag_mri
)
5405 #ifdef TC_EOL_IN_INSN
5406 || (insn
&& TC_EOL_IN_INSN (s
))
5410 if (mri_string
&& *s
== '\'')
5414 else if (*s
== '\\')
5418 #ifdef TC_SINGLE_QUOTE_STRINGS
5419 || (TC_SINGLE_QUOTE_STRINGS
&& *s
== '\'')
5426 as_warn (_("missing closing `%c'"), inquote
);
5428 as_warn (_("stray `\\'"));
5433 find_end_of_line (char *s
, int mri_string
)
5435 return _find_end_of_line (s
, mri_string
, 0);