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 Free Software Foundation, Inc.
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
23 /* If your chars aren't 8 bits, you will change this a bit.
24 But then, GNU isn't spozed to run on your machine anyway.
25 (RMS is so shortsighted sometimes.) */
26 #define MASK_CHAR (0xFF)
28 #define MASK_CHAR ((int)(unsigned char) -1)
31 /* This is the largest known floating point format (for now). It will
32 grow when we do 4361 style flonums. */
33 #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
35 /* Routines that read assembler source text to build spaghetti in memory.
36 Another group of these functions is in the expr.c module. */
39 #include "safe-ctype.h"
46 #include "dw2gencfi.h"
48 #ifndef TC_START_LABEL
49 #define TC_START_LABEL(x,y) (x == ':')
52 /* Set by the object-format or the target. */
53 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
54 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
59 else if ((SIZE) >= 4) \
61 else if ((SIZE) >= 2) \
69 char *input_line_pointer
; /*->next char of source file to parse. */
71 #if BITS_PER_CHAR != 8
72 /* The following table is indexed by[(char)] and will break if
73 a char does not have exactly 256 states (hopefully 0:255!)! */
78 /* The m88k unfortunately uses @ as a label beginner. */
83 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
88 /* The Delta 68k assembler permits % inside label names. */
93 /* The PowerPC Windows NT assemblers permits ? inside label names. */
98 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
99 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
104 /* The a29k assembler does not permits labels to start with $. */
109 /* The Delta 68k assembler permits ~ at start of label names. */
113 /* Used by is_... macros. our ctype[]. */
114 char lex_type
[256] = {
115 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
116 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
117 0, 0, 0, LEX_HASH
, LEX_DOLLAR
, LEX_PCT
, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
118 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM
, /* 0123456789:;<=>? */
119 LEX_AT
, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
120 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, 0, 3, /* PQRSTUVWXYZ[\]^_ */
121 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
122 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, LEX_TILDE
, 0, /* pqrstuvwxyz{|}~. */
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,
126 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
127 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
128 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
129 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
130 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
134 Out: 1 if this character ends a line. */
135 char is_end_of_line
[256] = {
137 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
139 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
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, /* 0123456789:;<=>? */
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, /* */
151 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
152 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
153 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
154 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
155 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
158 #ifndef TC_CASE_SENSITIVE
159 char original_case_string
[128];
162 /* Functions private to this file. */
164 static char *buffer
; /* 1st char of each buffer of lines is here. */
165 static char *buffer_limit
; /*->1 + last char in buffer. */
167 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
168 in the tc-<CPU>.h file. See the "Porting GAS" section of the
170 int target_big_endian
= TARGET_BYTES_BIG_ENDIAN
;
172 /* Variables for handling include file directory table. */
174 /* Table of pointers to directories to search for .include's. */
177 /* How many are in the table. */
178 int include_dir_count
;
180 /* Length of longest in table. */
181 int include_dir_maxlen
= 1;
183 #ifndef WORKING_DOT_WORD
184 struct broken_word
*broken_words
;
185 int new_broken_words
;
188 /* The current offset into the absolute section. We don't try to
189 build frags in the absolute section, since no data can be stored
190 there. We just keep track of the current offset. */
191 addressT abs_section_offset
;
193 /* If this line had an MRI style label, it is stored in this variable.
194 This is used by some of the MRI pseudo-ops. */
197 /* This global variable is used to support MRI common sections. We
198 translate such sections into a common symbol. This variable is
199 non-NULL when we are in an MRI common section. */
200 symbolS
*mri_common_symbol
;
202 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
203 need to align to an even byte boundary unless the next pseudo-op is
204 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
206 static int mri_pending_align
;
210 /* This variable is set to be non-zero if the next string we see might
211 be the name of the source file in DWARF debugging information. See
212 the comment in emit_expr for the format we look for. */
213 static int dwarf_file_string
;
217 static void do_align (int, char *, int, int);
218 static void s_align (int, int);
219 static void s_altmacro (int);
220 static int hex_float (int, char *);
221 static segT
get_known_segmented_expression (expressionS
* expP
);
222 static void pobegin (void);
223 static int get_line_sb (sb
*);
224 static void generate_file_debug (void);
232 obj_read_begin_hook ();
234 /* Something close -- but not too close -- to a multiple of 1024.
235 The debugging malloc I'm using has 24 bytes of overhead. */
236 obstack_begin (¬es
, chunksize
);
237 obstack_begin (&cond_obstack
, chunksize
);
239 /* Use machine dependent syntax. */
240 for (p
= line_separator_chars
; *p
; p
++)
241 is_end_of_line
[(unsigned char) *p
] = 1;
242 /* Use more. FIXME-SOMEDAY. */
248 /* Set up pseudo-op tables. */
250 static struct hash_control
*po_hash
;
252 static const pseudo_typeS potable
[] = {
253 {"abort", s_abort
, 0},
254 {"align", s_align_ptwo
, 0},
255 {"altmacro", s_altmacro
, 1},
256 {"ascii", stringer
, 0},
257 {"asciz", stringer
, 1},
258 {"balign", s_align_bytes
, 0},
259 {"balignw", s_align_bytes
, -2},
260 {"balignl", s_align_bytes
, -4},
264 {"common", s_mri_common
, 0},
265 {"common.s", s_mri_common
, 1},
269 {"dc.d", float_cons
, 'd'},
271 {"dc.s", float_cons
, 'f'},
273 {"dc.x", float_cons
, 'x'},
275 {"dcb.b", s_space
, 1},
276 {"dcb.d", s_float_space
, 'd'},
277 {"dcb.l", s_space
, 4},
278 {"dcb.s", s_float_space
, 'f'},
279 {"dcb.w", s_space
, 2},
280 {"dcb.x", s_float_space
, 'x'},
282 {"ds.b", s_space
, 1},
283 {"ds.d", s_space
, 8},
284 {"ds.l", s_space
, 4},
285 {"ds.p", s_space
, 12},
286 {"ds.s", s_space
, 4},
287 {"ds.w", s_space
, 2},
288 {"ds.x", s_space
, 12},
289 {"debug", s_ignore
, 0},
294 {"double", float_cons
, 'd'},
296 {"eject", listing_eject
, 0}, /* Formfeed listing. */
298 {"elsec", s_else
, 0},
299 {"elseif", s_elseif
, (int) O_ne
},
301 {"endc", s_endif
, 0},
302 {"endfunc", s_func
, 1},
303 {"endif", s_endif
, 0},
304 {"endr", s_bad_endr
, 0},
309 {"error", s_errwarn
, 1},
310 {"exitm", s_mexit
, 0},
312 {"extern", s_ignore
, 0}, /* We treat all undef as ext. */
313 {"appfile", s_app_file
, 1},
314 {"appline", s_app_line
, 0},
316 {"file", s_app_file
, 0},
318 {"float", float_cons
, 'f'},
319 {"format", s_ignore
, 0},
321 {"global", s_globl
, 0},
322 {"globl", s_globl
, 0},
324 {"if", s_if
, (int) O_ne
},
326 {"ifdef", s_ifdef
, 0},
327 {"ifeq", s_if
, (int) O_eq
},
328 {"ifeqs", s_ifeqs
, 0},
329 {"ifge", s_if
, (int) O_ge
},
330 {"ifgt", s_if
, (int) O_gt
},
331 {"ifle", s_if
, (int) O_le
},
332 {"iflt", s_if
, (int) O_lt
},
334 {"ifndef", s_ifdef
, 1},
335 {"ifne", s_if
, (int) O_ne
},
336 {"ifnes", s_ifeqs
, 1},
337 {"ifnotdef", s_ifdef
, 1},
338 {"incbin", s_incbin
, 0},
339 {"include", s_include
, 0},
345 {"lcomm", s_lcomm
, 0},
346 {"lflags", listing_flags
, 0}, /* Listing flags. */
347 {"linkonce", s_linkonce
, 0},
348 {"list", listing_list
, 1}, /* Turn listing on. */
349 {"llen", listing_psize
, 1},
352 {"macro", s_macro
, 0},
353 {"mexit", s_mexit
, 0},
355 {".mri", s_mri
, 0}, /* Special case so .mri works in MRI mode. */
356 {"name", s_ignore
, 0},
357 {"noaltmacro", s_altmacro
, 0},
358 {"noformat", s_ignore
, 0},
359 {"nolist", listing_list
, 0}, /* Turn listing off. */
360 {"nopage", listing_nopage
, 0},
362 {"offset", s_struct
, 0},
364 {"p2align", s_align_ptwo
, 0},
365 {"p2alignw", s_align_ptwo
, -2},
366 {"p2alignl", s_align_ptwo
, -4},
367 {"page", listing_eject
, 0},
368 {"plen", listing_psize
, 0},
369 {"print", s_print
, 0},
370 {"psize", listing_psize
, 0}, /* Set paper size. */
371 {"purgem", s_purgem
, 0},
376 {"sbttl", listing_title
, 1}, /* Subtitle of listing. */
381 {"single", float_cons
, 'f'},
383 {"space", s_space
, 0},
384 {"skip", s_space
, 0},
385 {"sleb128", s_leb128
, 1},
386 {"spc", s_ignore
, 0},
387 {"stabd", s_stab
, 'd'},
388 {"stabn", s_stab
, 'n'},
389 {"stabs", s_stab
, 's'},
390 {"string", stringer
, 1},
391 {"struct", s_struct
, 0},
395 /* This is for gcc to use. It's only just been added (2/94), so gcc
396 won't be able to use it for a while -- probably a year or more.
397 But once this has been released, check with gcc maintainers
398 before deleting it or even changing the spelling. */
399 {"this_GCC_requires_the_GNU_assembler", s_ignore
, 0},
400 /* If we're folding case -- done for some targets, not necessarily
401 all -- the above string in an input file will be converted to
402 this one. Match it either way... */
403 {"this_gcc_requires_the_gnu_assembler", s_ignore
, 0},
405 {"title", listing_title
, 0}, /* Listing title. */
406 {"ttl", listing_title
, 0},
408 {"uleb128", s_leb128
, 0},
412 {"xdef", s_globl
, 0},
413 {"xref", s_ignore
, 0},
414 {"xstabs", s_xstab
, 's'},
415 {"warning", s_errwarn
, 0},
417 {"zero", s_space
, 0},
418 {NULL
, NULL
, 0} /* End sentinel. */
421 static int pop_override_ok
= 0;
422 static const char *pop_table_name
;
425 pop_insert (const pseudo_typeS
*table
)
428 const pseudo_typeS
*pop
;
429 for (pop
= table
; pop
->poc_name
; pop
++)
431 errtxt
= hash_insert (po_hash
, pop
->poc_name
, (char *) pop
);
432 if (errtxt
&& (!pop_override_ok
|| strcmp (errtxt
, "exists")))
433 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name
,
438 #ifndef md_pop_insert
439 #define md_pop_insert() pop_insert(md_pseudo_table)
442 #ifndef obj_pop_insert
443 #define obj_pop_insert() pop_insert(obj_pseudo_table)
446 #ifndef cfi_pop_insert
447 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
453 po_hash
= hash_new ();
455 /* Do the target-specific pseudo ops. */
456 pop_table_name
= "md";
459 /* Now object specific. Skip any that were in the target table. */
460 pop_table_name
= "obj";
464 /* Now portable ones. Skip any that we've seen already. */
465 pop_table_name
= "standard";
466 pop_insert (potable
);
468 #ifdef TARGET_USE_CFIPOP
469 pop_table_name
= "cfi";
475 #define HANDLE_CONDITIONAL_ASSEMBLY() \
476 if (ignore_input ()) \
478 while (!is_end_of_line[(unsigned char) *input_line_pointer++]) \
479 if (input_line_pointer == buffer_limit) \
484 /* This function is used when scrubbing the characters between #APP
487 static char *scrub_string
;
488 static char *scrub_string_end
;
491 scrub_from_string (char *buf
, int buflen
)
495 copy
= scrub_string_end
- scrub_string
;
498 memcpy (buf
, scrub_string
, copy
);
499 scrub_string
+= copy
;
503 /* We read the file, putting things into a web that represents what we
504 have been reading. */
506 read_a_source_file (char *name
)
509 register char *s
; /* String of symbol, '\0' appended. */
517 buffer
= input_scrub_new_file (name
);
520 listing_newline (NULL
);
521 register_dependency (name
);
523 /* Generate debugging information before we've read anything in to denote
524 this file as the "main" source file and not a subordinate one
525 (e.g. N_SO vs N_SOL in stabs). */
526 generate_file_debug ();
528 while ((buffer_limit
= input_scrub_next_buffer (&input_line_pointer
)) != 0)
529 { /* We have another line to parse. */
530 know (buffer_limit
[-1] == '\n'); /* Must have a sentinel. */
532 while (input_line_pointer
< buffer_limit
)
534 /* We have more of this buffer to parse. */
536 /* We now have input_line_pointer->1st char of next line.
537 If input_line_pointer [-1] == '\n' then we just
538 scanned another line: so bump line counters. */
539 if (is_end_of_line
[(unsigned char) input_line_pointer
[-1]])
541 #ifdef md_start_line_hook
542 md_start_line_hook ();
544 if (input_line_pointer
[-1] == '\n')
545 bump_line_counters ();
549 if (LABELS_WITHOUT_COLONS
|| flag_m68k_mri
)
551 /* Text at the start of a line must be a label, we
552 run down and stick a colon in. */
553 if (is_name_beginner (*input_line_pointer
))
555 char *line_start
= input_line_pointer
;
560 HANDLE_CONDITIONAL_ASSEMBLY ();
562 c
= get_symbol_end ();
564 /* In MRI mode, the EQU and MACRO pseudoops must
565 be handled specially. */
569 char *rest
= input_line_pointer
+ 1;
573 if (*rest
== ' ' || *rest
== '\t')
575 if ((strncasecmp (rest
, "EQU", 3) == 0
576 || strncasecmp (rest
, "SET", 3) == 0)
577 && (rest
[3] == ' ' || rest
[3] == '\t'))
579 input_line_pointer
= rest
+ 3;
581 strncasecmp (rest
, "SET", 3) == 0);
584 if (strncasecmp (rest
, "MACRO", 5) == 0
587 || is_end_of_line
[(unsigned char) rest
[5]]))
591 /* In MRI mode, we need to handle the MACRO
592 pseudo-op specially: we don't want to put the
593 symbol in the symbol table. */
595 #ifdef TC_START_LABEL_WITHOUT_COLON
596 && TC_START_LABEL_WITHOUT_COLON(c
,
600 line_label
= colon (line_start
);
602 line_label
= symbol_create (line_start
,
607 *input_line_pointer
= c
;
609 input_line_pointer
++;
614 /* We are at the beginning of a line, or similar place.
615 We expect a well-formed assembler statement.
616 A "symbol-name:" is a statement.
618 Depending on what compiler is used, the order of these tests
619 may vary to catch most common case 1st.
620 Each test is independent of all other tests at the (top) level.
621 PLEASE make a compiler that doesn't use this assembler.
622 It is crufty to waste a compiler's time encoding things for this
623 assembler, which then wastes more time decoding it.
624 (And communicating via (linear) files is silly!
625 If you must pass stuff, please pass a tree!) */
626 if ((c
= *input_line_pointer
++) == '\t'
630 c
= *input_line_pointer
++;
632 know (c
!= ' '); /* No further leading whitespace. */
635 /* If listing is on, and we are expanding a macro, then give
636 the listing code the contents of the expanded line. */
639 if ((listing
& LISTING_MACEXP
) && macro_nest
> 0)
644 /* Find the end of the current expanded macro line. */
645 for (s
= input_line_pointer
- 1; *s
; ++s
)
646 if (is_end_of_line
[(unsigned char) *s
])
649 /* Copy it for safe keeping. Also give an indication of
650 how much macro nesting is involved at this point. */
651 len
= s
- (input_line_pointer
- 1);
652 copy
= (char *) xmalloc (len
+ macro_nest
+ 2);
653 memset (copy
, '>', macro_nest
);
654 copy
[macro_nest
] = ' ';
655 memcpy (copy
+ macro_nest
+ 1, input_line_pointer
- 1, len
);
656 copy
[macro_nest
+ 1 + len
] = '\0';
658 /* Install the line with the listing facility. */
659 listing_newline (copy
);
662 listing_newline (NULL
);
665 /* C is the 1st significant character.
666 Input_line_pointer points after that character. */
667 if (is_name_beginner (c
))
669 /* Want user-defined label or pseudo/opcode. */
670 HANDLE_CONDITIONAL_ASSEMBLY ();
672 s
= --input_line_pointer
;
673 c
= get_symbol_end (); /* name's delimiter. */
675 /* C is character after symbol.
676 That character's place in the input line is now '\0'.
677 S points to the beginning of the symbol.
678 [In case of pseudo-op, s->'.'.]
679 Input_line_pointer->'\0' where c was. */
680 if (TC_START_LABEL (c
, input_line_pointer
))
684 char *rest
= input_line_pointer
+ 1;
686 /* In MRI mode, \tsym: set 0 is permitted. */
690 if (*rest
== ' ' || *rest
== '\t')
693 if ((strncasecmp (rest
, "EQU", 3) == 0
694 || strncasecmp (rest
, "SET", 3) == 0)
695 && (rest
[3] == ' ' || rest
[3] == '\t'))
697 input_line_pointer
= rest
+ 3;
703 line_label
= colon (s
); /* User-defined label. */
704 /* Put ':' back for error messages' sake. */
705 *input_line_pointer
++ = ':';
706 #ifdef tc_check_label
707 tc_check_label (line_label
);
709 /* Input_line_pointer->after ':'. */
713 || ((c
== ' ' || c
== '\t')
714 && input_line_pointer
[1] == '='
715 #ifdef TC_EQUAL_IN_INSN
716 && !TC_EQUAL_IN_INSN (c
, input_line_pointer
)
721 demand_empty_rest_of_line ();
725 /* Expect pseudo-op or machine instruction. */
728 #ifndef TC_CASE_SENSITIVE
732 strncpy (original_case_string
, s2
, sizeof (original_case_string
));
733 original_case_string
[sizeof (original_case_string
) - 1] = 0;
742 if (NO_PSEUDO_DOT
|| flag_m68k_mri
)
744 /* The MRI assembler and the m88k use pseudo-ops
746 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
);
747 if (pop
!= NULL
&& pop
->poc_handler
== NULL
)
752 || (!flag_m68k_mri
&& *s
== '.'))
756 WARNING: c has next char, which may be end-of-line.
757 We lookup the pseudo-op table with s+1 because we
758 already know that the pseudo-op begins with a '.'. */
761 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
+ 1);
762 if (pop
&& !pop
->poc_handler
)
765 /* In MRI mode, we may need to insert an
766 automatic alignment directive. What a hack
768 if (mri_pending_align
770 || !((pop
->poc_handler
== cons
771 && pop
->poc_val
== 1)
772 || (pop
->poc_handler
== s_space
773 && pop
->poc_val
== 1)
774 #ifdef tc_conditional_pseudoop
775 || tc_conditional_pseudoop (pop
)
777 || pop
->poc_handler
== s_if
778 || pop
->poc_handler
== s_ifdef
779 || pop
->poc_handler
== s_ifc
780 || pop
->poc_handler
== s_ifeqs
781 || pop
->poc_handler
== s_else
782 || pop
->poc_handler
== s_endif
783 || pop
->poc_handler
== s_globl
784 || pop
->poc_handler
== s_ignore
)))
786 do_align (1, (char *) NULL
, 0, 0);
787 mri_pending_align
= 0;
789 if (line_label
!= NULL
)
791 symbol_set_frag (line_label
, frag_now
);
792 S_SET_VALUE (line_label
, frag_now_fix ());
796 /* Print the error msg now, while we still can. */
799 as_bad (_("unknown pseudo-op: `%s'"), s
);
800 *input_line_pointer
= c
;
805 /* Put it back for error messages etc. */
806 *input_line_pointer
= c
;
807 /* The following skip of whitespace is compulsory.
808 A well shaped space is sometimes all that separates
809 keyword from operands. */
810 if (c
== ' ' || c
== '\t')
811 input_line_pointer
++;
813 /* Input_line is restored.
814 Input_line_pointer->1st non-blank char
815 after pseudo-operation. */
816 (*pop
->poc_handler
) (pop
->poc_val
);
818 /* If that was .end, just get out now. */
819 if (pop
->poc_handler
== s_end
)
825 #ifdef QUOTES_IN_INSN
829 /* WARNING: c has char, which may be end-of-line. */
830 /* Also: input_line_pointer->`\0` where c was. */
831 *input_line_pointer
= c
;
832 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
834 #ifdef TC_EOL_IN_INSN
835 || TC_EOL_IN_INSN (input_line_pointer
)
839 if (flag_m68k_mri
&& *input_line_pointer
== '\'')
841 #ifdef QUOTES_IN_INSN
844 else if (*input_line_pointer
== '"')
846 else if (*input_line_pointer
== '\\')
849 input_line_pointer
++;
852 c
= *input_line_pointer
;
853 *input_line_pointer
= '\0';
855 generate_lineno_debug ();
863 if (check_macro (s
, &out
, &err
, ¯o
))
867 *input_line_pointer
++ = c
;
868 input_scrub_include_sb (&out
,
869 input_line_pointer
, 1);
872 input_scrub_next_buffer (&input_line_pointer
);
874 md_macro_info (macro
);
880 if (mri_pending_align
)
882 do_align (1, (char *) NULL
, 0, 0);
883 mri_pending_align
= 0;
884 if (line_label
!= NULL
)
886 symbol_set_frag (line_label
, frag_now
);
887 S_SET_VALUE (line_label
, frag_now_fix ());
891 md_assemble (s
); /* Assemble 1 instruction. */
893 *input_line_pointer
++ = c
;
895 /* We resume loop AFTER the end-of-line from
902 /* Empty statement? */
903 if (is_end_of_line
[(unsigned char) c
])
906 if ((LOCAL_LABELS_DOLLAR
|| LOCAL_LABELS_FB
) && ISDIGIT (c
))
908 /* local label ("4:") */
909 char *backup
= input_line_pointer
;
911 HANDLE_CONDITIONAL_ASSEMBLY ();
915 /* Read the whole number. */
916 while (ISDIGIT (*input_line_pointer
))
918 temp
= (temp
* 10) + *input_line_pointer
- '0';
919 ++input_line_pointer
;
922 if (LOCAL_LABELS_DOLLAR
923 && *input_line_pointer
== '$'
924 && *(input_line_pointer
+ 1) == ':')
926 input_line_pointer
+= 2;
928 if (dollar_label_defined (temp
))
930 as_fatal (_("label \"%d$\" redefined"), temp
);
933 define_dollar_label (temp
);
934 colon (dollar_label_name (temp
, 0));
939 && *input_line_pointer
++ == ':')
941 fb_label_instance_inc (temp
);
942 colon (fb_label_name (temp
, 0));
946 input_line_pointer
= backup
;
947 } /* local label ("4:") */
949 if (c
&& strchr (line_comment_chars
, c
))
950 { /* Its a comment. Better say APP or NO_APP. */
955 unsigned int new_length
;
958 bump_line_counters ();
959 s
= input_line_pointer
;
960 if (strncmp (s
, "APP\n", 4))
961 continue; /* We ignore it */
965 ends
= strstr (s
, "#NO_APP\n");
969 unsigned int tmp_len
;
972 /* The end of the #APP wasn't in this buffer. We
973 keep reading in buffers until we find the #NO_APP
974 that goes with this #APP There is one. The specs
976 tmp_len
= buffer_limit
- s
;
977 tmp_buf
= xmalloc (tmp_len
+ 1);
978 memcpy (tmp_buf
, s
, tmp_len
);
981 new_tmp
= input_scrub_next_buffer (&buffer
);
985 buffer_limit
= new_tmp
;
986 input_line_pointer
= buffer
;
987 ends
= strstr (buffer
, "#NO_APP\n");
991 num
= buffer_limit
- buffer
;
993 tmp_buf
= xrealloc (tmp_buf
, tmp_len
+ num
);
994 memcpy (tmp_buf
+ tmp_len
, buffer
, num
);
999 input_line_pointer
= ends
? ends
+ 8 : NULL
;
1007 input_line_pointer
= ends
+ 8;
1011 scrub_string_end
= ends
;
1013 new_length
= ends
- s
;
1014 new_buf
= (char *) xmalloc (new_length
);
1021 space
= (new_buf
+ new_length
) - new_tmp
;
1022 size
= do_scrub_chars (scrub_from_string
, new_tmp
, space
);
1030 new_buf
= xrealloc (new_buf
, new_length
+ 100);
1031 new_tmp
= new_buf
+ new_length
;
1038 /* We've "scrubbed" input to the preferred format. In the
1039 process we may have consumed the whole of the remaining
1040 file (and included files). We handle this formatted
1041 input similar to that of macro expansion, letting
1042 actual macro expansion (possibly nested) and other
1043 input expansion work. Beware that in messages, line
1044 numbers and possibly file names will be incorrect. */
1045 sb_add_string (&sbuf
, new_buf
);
1046 input_scrub_include_sb (&sbuf
, input_line_pointer
, 0);
1048 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1053 HANDLE_CONDITIONAL_ASSEMBLY ();
1055 #ifdef tc_unrecognized_line
1056 if (tc_unrecognized_line (c
))
1059 input_line_pointer
--;
1060 /* Report unknown char as ignored. */
1061 demand_empty_rest_of_line ();
1064 #ifdef md_after_pass_hook
1065 md_after_pass_hook ();
1074 /* Close the input file. */
1075 input_scrub_close ();
1076 #ifdef WARN_COMMENTS
1078 if (warn_comment
&& found_comment
)
1079 as_warn_where (found_comment_file
, found_comment
,
1080 "first comment found here");
1085 /* For most MRI pseudo-ops, the line actually ends at the first
1086 nonquoted space. This function looks for that point, stuffs a null
1087 in, and sets *STOPCP to the character that used to be there, and
1088 returns the location.
1090 Until I hear otherwise, I am going to assume that this is only true
1091 for the m68k MRI assembler. */
1094 mri_comment_field (char *stopcp
)
1100 know (flag_m68k_mri
);
1102 for (s
= input_line_pointer
;
1103 ((!is_end_of_line
[(unsigned char) *s
] && *s
!= ' ' && *s
!= '\t')
1111 for (s
= input_line_pointer
;
1112 !is_end_of_line
[(unsigned char) *s
];
1122 /* Skip to the end of an MRI comment field. */
1125 mri_comment_end (char *stop
, int stopc
)
1129 input_line_pointer
= stop
;
1131 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1132 ++input_line_pointer
;
1136 s_abort (int ignore ATTRIBUTE_UNUSED
)
1138 as_fatal (_(".abort detected. Abandoning ship."));
1141 /* Guts of .align directive. N is the power of two to which to align.
1142 FILL may be NULL, or it may point to the bytes of the fill pattern.
1143 LEN is the length of whatever FILL points to, if anything. MAX is
1144 the maximum number of characters to skip when doing the alignment,
1145 or 0 if there is no maximum. */
1148 do_align (int n
, char *fill
, int len
, int max
)
1150 if (now_seg
== absolute_section
)
1154 if (*fill
++ != '\0')
1156 as_warn (_("ignoring fill value in absolute section"));
1163 #ifdef md_flush_pending_output
1164 md_flush_pending_output ();
1167 md_do_align (n
, fill
, len
, max
, just_record_alignment
);
1170 /* Only make a frag if we HAVE to... */
1171 if (n
!= 0 && !need_pass_2
)
1175 if (subseg_text_p (now_seg
))
1176 frag_align_code (n
, max
);
1178 frag_align (n
, 0, max
);
1181 frag_align (n
, *fill
, max
);
1183 frag_align_pattern (n
, fill
, len
, max
);
1187 just_record_alignment
: ATTRIBUTE_UNUSED_LABEL
1190 record_alignment (now_seg
, n
- OCTETS_PER_BYTE_POWER
);
1193 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1194 (in bytes). A negative ARG is the negative of the length of the
1195 fill pattern. BYTES_P is non-zero if the alignment value should be
1196 interpreted as the byte boundary, rather than the power of 2. */
1198 #ifdef BFD_ASSEMBLER
1199 #define ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1201 #define ALIGN_LIMIT 15
1205 s_align (int arg
, int bytes_p
)
1215 stop
= mri_comment_field (&stopc
);
1217 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1222 align
= arg
; /* Default value from pseudo-op table. */
1226 align
= get_absolute_expression ();
1232 /* Convert to a power of 2. */
1237 for (i
= 0; (align
& 1) == 0; align
>>= 1, ++i
)
1240 as_bad (_("alignment not a power of 2"));
1246 if (align
> ALIGN_LIMIT
)
1248 align
= ALIGN_LIMIT
;
1249 as_warn (_("alignment too large: %u assumed"), align
);
1252 if (*input_line_pointer
!= ',')
1259 ++input_line_pointer
;
1260 if (*input_line_pointer
== ',')
1264 fill
= get_absolute_expression ();
1269 if (*input_line_pointer
!= ',')
1273 ++input_line_pointer
;
1274 max
= get_absolute_expression ();
1281 as_warn (_("expected fill pattern missing"));
1282 do_align (align
, (char *) NULL
, 0, max
);
1297 do_align (align
, &fill_char
, fill_len
, max
);
1303 if ((size_t) fill_len
> sizeof ab
)
1305 md_number_to_chars (ab
, fill
, fill_len
);
1306 do_align (align
, ab
, fill_len
, max
);
1310 demand_empty_rest_of_line ();
1313 mri_comment_end (stop
, stopc
);
1316 /* Handle the .align pseudo-op on machines where ".align 4" means
1317 align to a 4 byte boundary. */
1320 s_align_bytes (int arg
)
1325 /* Handle the .align pseudo-op on machines where ".align 4" means align
1326 to a 2**4 boundary. */
1329 s_align_ptwo (int arg
)
1334 /* Switch in and out of alternate macro mode. */
1339 demand_empty_rest_of_line ();
1340 macro_set_alternate (on
);
1344 s_comm_internal (int param
,
1345 symbolS
*(*comm_parse_extra
) (int, symbolS
*, addressT
))
1351 symbolS
*symbolP
= NULL
;
1357 stop
= mri_comment_field (&stopc
);
1359 name
= input_line_pointer
;
1360 c
= get_symbol_end ();
1361 /* Just after name is now '\0'. */
1362 p
= input_line_pointer
;
1367 as_bad (_("expected symbol name"));
1368 discard_rest_of_line ();
1374 /* Accept an optional comma after the name. The comma used to be
1375 required, but Irix 5 cc does not generate it for .lcomm. */
1376 if (*input_line_pointer
== ',')
1377 input_line_pointer
++;
1380 temp
= get_absolute_expr (&exp
);
1382 #ifdef BFD_ASSEMBLER
1383 size
&= ((offsetT
) 2 << (stdoutput
->arch_info
->bits_per_address
- 1)) - 1;
1385 if (exp
.X_op
== O_absent
)
1387 as_bad (_("missing size expression"));
1389 ignore_rest_of_line ();
1392 else if (temp
!= size
|| !exp
.X_unsigned
)
1394 as_warn (_("size (%ld) out of range, ignored"), (long) temp
);
1396 ignore_rest_of_line ();
1400 symbolP
= symbol_find_or_make (name
);
1401 if (S_IS_DEFINED (symbolP
) && !S_IS_COMMON (symbolP
))
1404 as_bad (_("symbol `%s' is already defined"), name
);
1406 ignore_rest_of_line ();
1410 size
= S_GET_VALUE (symbolP
);
1413 else if (size
!= temp
)
1414 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1415 name
, (long) size
, (long) temp
);
1418 if (comm_parse_extra
!= NULL
)
1419 symbolP
= (*comm_parse_extra
) (param
, symbolP
, size
);
1422 S_SET_VALUE (symbolP
, (valueT
) size
);
1423 S_SET_EXTERNAL (symbolP
);
1426 extern int flag_one
;
1427 if (size
== 0 || !flag_one
)
1428 S_GET_OTHER (symbolP
) = const_flag
;
1433 know (symbolP
== NULL
|| symbolP
->sy_frag
== &zero_address_frag
);
1434 demand_empty_rest_of_line ();
1437 mri_comment_end (stop
, stopc
);
1444 s_comm_internal (ignore
, NULL
);
1447 /* The MRI COMMON pseudo-op. We handle this by creating a common
1448 symbol with the appropriate name. We make s_space do the right
1449 thing by increasing the size. */
1452 s_mri_common (int small ATTRIBUTE_UNUSED
)
1468 stop
= mri_comment_field (&stopc
);
1472 name
= input_line_pointer
;
1473 if (!ISDIGIT (*name
))
1474 c
= get_symbol_end ();
1479 ++input_line_pointer
;
1481 while (ISDIGIT (*input_line_pointer
));
1483 c
= *input_line_pointer
;
1484 *input_line_pointer
= '\0';
1486 if (line_label
!= NULL
)
1488 alc
= (char *) xmalloc (strlen (S_GET_NAME (line_label
))
1489 + (input_line_pointer
- name
)
1491 sprintf (alc
, "%s%s", name
, S_GET_NAME (line_label
));
1496 sym
= symbol_find_or_make (name
);
1497 *input_line_pointer
= c
;
1501 if (*input_line_pointer
!= ',')
1505 ++input_line_pointer
;
1506 align
= get_absolute_expression ();
1509 if (S_IS_DEFINED (sym
) && !S_IS_COMMON (sym
))
1511 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym
));
1512 ignore_rest_of_line ();
1513 mri_comment_end (stop
, stopc
);
1517 S_SET_EXTERNAL (sym
);
1518 mri_common_symbol
= sym
;
1522 S_SET_ALIGN (sym
, align
);
1525 if (line_label
!= NULL
)
1528 exp
.X_op
= O_symbol
;
1529 exp
.X_add_symbol
= sym
;
1530 exp
.X_add_number
= 0;
1531 symbol_set_value_expression (line_label
, &exp
);
1532 symbol_set_frag (line_label
, &zero_address_frag
);
1533 S_SET_SEGMENT (line_label
, expr_section
);
1536 /* FIXME: We just ignore the small argument, which distinguishes
1537 COMMON and COMMON.S. I don't know what we can do about it. */
1539 /* Ignore the type and hptype. */
1540 if (*input_line_pointer
== ',')
1541 input_line_pointer
+= 2;
1542 if (*input_line_pointer
== ',')
1543 input_line_pointer
+= 2;
1545 demand_empty_rest_of_line ();
1547 mri_comment_end (stop
, stopc
);
1551 s_data (int ignore ATTRIBUTE_UNUSED
)
1556 temp
= get_absolute_expression ();
1557 if (flag_readonly_data_in_text
)
1559 section
= text_section
;
1563 section
= data_section
;
1565 subseg_set (section
, (subsegT
) temp
);
1570 demand_empty_rest_of_line ();
1573 /* Handle the .appfile pseudo-op. This is automatically generated by
1574 do_scrub_chars when a preprocessor # line comment is seen with a
1575 file name. This default definition may be overridden by the object
1576 or CPU specific pseudo-ops. This function is also the default
1577 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1581 s_app_file_string (char *file
, int appfile
)
1585 listing_source_file (file
);
1587 register_dependency (file
);
1589 obj_app_file (file
, appfile
);
1594 s_app_file (int appfile
)
1599 /* Some assemblers tolerate immediately following '"'. */
1600 if ((s
= demand_copy_string (&length
)) != 0)
1602 /* If this is a fake .appfile, a fake newline was inserted into
1603 the buffer. Passing -2 to new_logical_line tells it to
1606 = (!new_logical_line (s
, appfile
? -2 : -1) && appfile
);
1608 /* In MRI mode, the preprocessor may have inserted an extraneous
1611 && *input_line_pointer
== '\''
1612 && is_end_of_line
[(unsigned char) input_line_pointer
[1]])
1613 ++input_line_pointer
;
1615 demand_empty_rest_of_line ();
1617 s_app_file_string (s
, appfile
);
1621 /* Handle the .appline pseudo-op. This is automatically generated by
1622 do_scrub_chars when a preprocessor # line comment is seen. This
1623 default definition may be overridden by the object or CPU specific
1627 s_app_line (int ignore ATTRIBUTE_UNUSED
)
1631 /* The given number is that of the next line. */
1632 l
= get_absolute_expression () - 1;
1634 /* Some of the back ends can't deal with non-positive line numbers.
1635 Besides, it's silly. */
1636 as_warn (_("line numbers must be positive; line number %d rejected"),
1640 new_logical_line ((char *) NULL
, l
);
1643 listing_source_line (l
);
1646 demand_empty_rest_of_line ();
1649 /* Handle the .end pseudo-op. Actually, the real work is done in
1650 read_a_source_file. */
1653 s_end (int ignore ATTRIBUTE_UNUSED
)
1657 /* The MRI assembler permits the start symbol to follow .end,
1658 but we don't support that. */
1660 if (!is_end_of_line
[(unsigned char) *input_line_pointer
]
1661 && *input_line_pointer
!= '*'
1662 && *input_line_pointer
!= '!')
1663 as_warn (_("start address not supported"));
1667 /* Handle the .err pseudo-op. */
1670 s_err (int ignore ATTRIBUTE_UNUSED
)
1672 as_bad (_(".err encountered"));
1673 demand_empty_rest_of_line ();
1676 /* Handle the .error and .warning pseudo-ops. */
1682 /* The purpose for the conditional assignment is not to
1683 internationalize the directive itself, but that we need a
1684 self-contained message, one that can be passed like the
1685 demand_copy_C_string return value, and with no assumption on the
1686 location of the name of the directive within the message. */
1688 = (err
? _(".error directive invoked in source file")
1689 : _(".warning directive invoked in source file"));
1691 if (!is_it_end_of_statement ())
1693 if (*input_line_pointer
!= '\"')
1695 as_bad (_("%s argument must be a string"),
1696 err
? ".error" : ".warning");
1697 discard_rest_of_line ();
1701 msg
= demand_copy_C_string (&len
);
1709 as_warn ("%s", msg
);
1710 demand_empty_rest_of_line ();
1713 /* Handle the MRI fail pseudo-op. */
1716 s_fail (int ignore ATTRIBUTE_UNUSED
)
1723 stop
= mri_comment_field (&stopc
);
1725 temp
= get_absolute_expression ();
1727 as_warn (_(".fail %ld encountered"), (long) temp
);
1729 as_bad (_(".fail %ld encountered"), (long) temp
);
1731 demand_empty_rest_of_line ();
1734 mri_comment_end (stop
, stopc
);
1738 s_fill (int ignore ATTRIBUTE_UNUSED
)
1740 expressionS rep_exp
;
1742 register long fill
= 0;
1745 #ifdef md_flush_pending_output
1746 md_flush_pending_output ();
1749 get_known_segmented_expression (&rep_exp
);
1750 if (*input_line_pointer
== ',')
1752 input_line_pointer
++;
1753 size
= get_absolute_expression ();
1754 if (*input_line_pointer
== ',')
1756 input_line_pointer
++;
1757 fill
= get_absolute_expression ();
1761 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1762 #define BSD_FILL_SIZE_CROCK_8 (8)
1763 if (size
> BSD_FILL_SIZE_CROCK_8
)
1765 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8
);
1766 size
= BSD_FILL_SIZE_CROCK_8
;
1770 as_warn (_("size negative; .fill ignored"));
1773 else if (rep_exp
.X_op
== O_constant
&& rep_exp
.X_add_number
<= 0)
1775 if (rep_exp
.X_add_number
< 0)
1776 as_warn (_("repeat < 0; .fill ignored"));
1780 if (size
&& !need_pass_2
)
1782 if (rep_exp
.X_op
== O_constant
)
1784 p
= frag_var (rs_fill
, (int) size
, (int) size
,
1785 (relax_substateT
) 0, (symbolS
*) 0,
1786 (offsetT
) rep_exp
.X_add_number
,
1791 /* We don't have a constant repeat count, so we can't use
1792 rs_fill. We can get the same results out of rs_space,
1793 but its argument is in bytes, so we must multiply the
1794 repeat count by size. */
1797 rep_sym
= make_expr_symbol (&rep_exp
);
1800 expressionS size_exp
;
1801 size_exp
.X_op
= O_constant
;
1802 size_exp
.X_add_number
= size
;
1804 rep_exp
.X_op
= O_multiply
;
1805 rep_exp
.X_add_symbol
= rep_sym
;
1806 rep_exp
.X_op_symbol
= make_expr_symbol (&size_exp
);
1807 rep_exp
.X_add_number
= 0;
1808 rep_sym
= make_expr_symbol (&rep_exp
);
1811 p
= frag_var (rs_space
, (int) size
, (int) size
,
1812 (relax_substateT
) 0, rep_sym
, (offsetT
) 0, (char *) 0);
1815 memset (p
, 0, (unsigned int) size
);
1817 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1818 flavoured AS. The following bizarre behaviour is to be
1819 compatible with above. I guess they tried to take up to 8
1820 bytes from a 4-byte expression and they forgot to sign
1822 #define BSD_FILL_SIZE_CROCK_4 (4)
1823 md_number_to_chars (p
, (valueT
) fill
,
1824 (size
> BSD_FILL_SIZE_CROCK_4
1825 ? BSD_FILL_SIZE_CROCK_4
1827 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1828 but emits no error message because it seems a legal thing to do.
1829 It is a degenerate case of .fill but could be emitted by a
1832 demand_empty_rest_of_line ();
1836 s_globl (int ignore ATTRIBUTE_UNUSED
)
1845 stop
= mri_comment_field (&stopc
);
1849 name
= input_line_pointer
;
1850 c
= get_symbol_end ();
1851 symbolP
= symbol_find_or_make (name
);
1852 S_SET_EXTERNAL (symbolP
);
1854 *input_line_pointer
= c
;
1856 c
= *input_line_pointer
;
1859 input_line_pointer
++;
1861 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1867 demand_empty_rest_of_line ();
1870 mri_comment_end (stop
, stopc
);
1873 /* Handle the MRI IRP and IRPC pseudo-ops. */
1884 as_where (&file
, &line
);
1887 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1888 sb_add_char (&s
, *input_line_pointer
++);
1892 err
= expand_irp (irpc
, 0, &s
, &out
, get_line_sb
);
1894 as_bad_where (file
, line
, "%s", err
);
1898 input_scrub_include_sb (&out
, input_line_pointer
, 1);
1900 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1903 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
1904 the section to only be linked once. However, this is not supported
1905 by most object file formats. This takes an optional argument,
1906 which is what to do about duplicates. */
1909 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
1911 enum linkonce_type type
;
1915 type
= LINKONCE_DISCARD
;
1917 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1922 s
= input_line_pointer
;
1923 c
= get_symbol_end ();
1924 if (strcasecmp (s
, "discard") == 0)
1925 type
= LINKONCE_DISCARD
;
1926 else if (strcasecmp (s
, "one_only") == 0)
1927 type
= LINKONCE_ONE_ONLY
;
1928 else if (strcasecmp (s
, "same_size") == 0)
1929 type
= LINKONCE_SAME_SIZE
;
1930 else if (strcasecmp (s
, "same_contents") == 0)
1931 type
= LINKONCE_SAME_CONTENTS
;
1933 as_warn (_("unrecognized .linkonce type `%s'"), s
);
1935 *input_line_pointer
= c
;
1938 #ifdef obj_handle_link_once
1939 obj_handle_link_once (type
);
1940 #else /* ! defined (obj_handle_link_once) */
1941 #ifdef BFD_ASSEMBLER
1945 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
1946 as_warn (_(".linkonce is not supported for this object file format"));
1948 flags
= bfd_get_section_flags (stdoutput
, now_seg
);
1949 flags
|= SEC_LINK_ONCE
;
1954 case LINKONCE_DISCARD
:
1955 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
1957 case LINKONCE_ONE_ONLY
:
1958 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
1960 case LINKONCE_SAME_SIZE
:
1961 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
1963 case LINKONCE_SAME_CONTENTS
:
1964 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
1967 if (!bfd_set_section_flags (stdoutput
, now_seg
, flags
))
1968 as_bad (_("bfd_set_section_flags: %s"),
1969 bfd_errmsg (bfd_get_error ()));
1971 #else /* ! defined (BFD_ASSEMBLER) */
1972 as_warn (_(".linkonce is not supported for this object file format"));
1973 #endif /* ! defined (BFD_ASSEMBLER) */
1974 #endif /* ! defined (obj_handle_link_once) */
1976 demand_empty_rest_of_line ();
1980 bss_alloc (symbolS
*symbolP
, addressT size
, int align
)
1983 segT current_seg
= now_seg
;
1984 subsegT current_subseg
= now_subseg
;
1985 segT bss_seg
= bss_section
;
1987 #if defined (TC_MIPS) || defined (TC_ALPHA)
1988 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
1989 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
1991 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
1992 if (size
<= bfd_get_gp_size (stdoutput
))
1994 bss_seg
= subseg_new (".sbss", 1);
1995 seg_info (bss_seg
)->bss
= 1;
1996 #ifdef BFD_ASSEMBLER
1997 if (!bfd_set_section_flags (stdoutput
, bss_seg
, SEC_ALLOC
))
1998 as_warn (_("error setting flags for \".sbss\": %s"),
1999 bfd_errmsg (bfd_get_error ()));
2004 subseg_set (bss_seg
, 1);
2008 record_alignment (bss_seg
, align
);
2009 frag_align (align
, 0, 0);
2012 /* Detach from old frag. */
2013 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2014 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2016 symbol_set_frag (symbolP
, frag_now
);
2017 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
, NULL
);
2021 S_SET_SIZE (symbolP
, size
);
2023 S_SET_SEGMENT (symbolP
, bss_seg
);
2026 /* The symbol may already have been created with a preceding
2027 ".globl" directive -- be careful not to step on storage class
2028 in that case. Otherwise, set it to static. */
2029 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2030 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2031 #endif /* OBJ_COFF */
2033 subseg_set (current_seg
, current_subseg
);
2037 parse_align (int align_bytes
)
2043 if (*input_line_pointer
!= ',')
2046 as_bad (_("expected alignment after size"));
2047 ignore_rest_of_line ();
2051 input_line_pointer
++;
2054 align
= get_absolute_expr (&exp
);
2055 if (exp
.X_op
== O_absent
)
2058 if (!exp
.X_unsigned
)
2060 as_warn (_("alignment negative; 0 assumed"));
2064 if (align_bytes
&& align
!= 0)
2066 /* convert to a power of 2 alignment */
2067 unsigned int alignp2
= 0;
2068 while ((align
& 1) == 0)
2069 align
>>= 1, ++alignp2
;
2072 as_bad (_("alignment not a power of 2"));
2073 ignore_rest_of_line ();
2081 /* Called from s_comm_internal after symbol name and size have been
2082 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2083 1 if this was a ".bss" directive which has a 3rd argument
2084 (alignment as a power of 2), or 2 if this was a ".bss" directive
2085 with alignment in bytes. */
2088 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2094 align
= parse_align (needs_align
- 1);
2095 if (align
== (addressT
) -1)
2099 /* Assume some objects may require alignment on some systems. */
2100 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2102 bss_alloc (symbolP
, size
, align
);
2107 s_lcomm (int needs_align
)
2109 s_comm_internal (needs_align
, s_lcomm_internal
);
2113 s_lcomm_bytes (int needs_align
)
2115 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2119 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2121 register char *name
;
2125 register symbolS
*symbolP
;
2127 /* We permit ANY defined expression: BSD4.2 demands constants. */
2128 name
= input_line_pointer
;
2129 c
= get_symbol_end ();
2130 p
= input_line_pointer
;
2135 as_bad (_("expected symbol name"));
2136 discard_rest_of_line ();
2142 if (*input_line_pointer
!= ',')
2145 as_bad (_("expected comma after \"%s\""), name
);
2147 ignore_rest_of_line ();
2151 input_line_pointer
++;
2154 if (exp
.X_op
!= O_constant
2155 && exp
.X_op
!= O_register
)
2157 as_bad (_("bad expression"));
2158 ignore_rest_of_line ();
2163 symbolP
= symbol_find_or_make (name
);
2165 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
2166 symbolP->sy_desc == 0) out of this test because coff doesn't have
2167 those fields, and I can't see when they'd ever be tripped. I
2168 don't think I understand why they were here so I may have
2169 introduced a bug. As recently as 1.37 didn't have this test
2170 anyway. xoxorich. */
2172 if (S_GET_SEGMENT (symbolP
) == undefined_section
2173 && S_GET_VALUE (symbolP
) == 0)
2175 /* The name might be an undefined .global symbol; be sure to
2176 keep the "external" bit. */
2177 S_SET_SEGMENT (symbolP
,
2178 (exp
.X_op
== O_constant
2181 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2185 as_bad (_("symbol `%s' is already defined"), name
);
2189 demand_empty_rest_of_line ();
2192 /* Read a line into an sb. Returns the character that ended the line
2193 or zero if there are no more lines. */
2196 get_line_sb (sb
*line
)
2198 char quote1
, quote2
, inquote
;
2201 if (input_line_pointer
[-1] == '\n')
2202 bump_line_counters ();
2204 if (input_line_pointer
>= buffer_limit
)
2206 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2207 if (buffer_limit
== 0)
2211 /* If app.c sets any other characters to LEX_IS_STRINGQUOTE, this
2212 code needs to be changed. */
2221 #ifdef LEX_IS_STRINGQUOTE
2227 while ((c
= * input_line_pointer
++) != 0
2228 && (!is_end_of_line
[c
]
2229 || (inquote
!= '\0' && c
!= '\n')))
2233 else if (inquote
== '\0')
2237 else if (c
== quote2
)
2241 sb_add_char (line
, c
);
2244 /* Don't skip multiple end-of-line characters, because that breaks support
2245 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2246 characters but isn't. Instead just skip one end of line character and
2247 return the character skipped so that the caller can re-insert it if
2252 /* Define a macro. This is an interface to macro.c. */
2255 s_macro (int ignore ATTRIBUTE_UNUSED
)
2264 as_where (&file
, &line
);
2267 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
2268 sb_add_char (&s
, *input_line_pointer
++);
2271 if (line_label
!= NULL
)
2272 sb_add_string (&label
, S_GET_NAME (line_label
));
2274 err
= define_macro (0, &s
, &label
, get_line_sb
, &name
);
2276 as_bad_where (file
, line
, "%s", err
);
2279 if (line_label
!= NULL
)
2281 S_SET_SEGMENT (line_label
, undefined_section
);
2282 S_SET_VALUE (line_label
, 0);
2283 symbol_set_frag (line_label
, &zero_address_frag
);
2286 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2287 && hash_find (po_hash
, name
) != NULL
)
2290 && hash_find (po_hash
, name
+ 1) != NULL
))
2291 as_warn (_("attempt to redefine pseudo-op `%s' ignored"),
2298 /* Handle the .mexit pseudo-op, which immediately exits a macro
2302 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2304 cond_exit_macro (macro_nest
);
2305 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2308 /* Switch in and out of MRI mode. */
2311 s_mri (int ignore ATTRIBUTE_UNUSED
)
2315 on
= get_absolute_expression ();
2316 old_flag
= flag_mri
;
2334 /* Operator precedence changes in m68k MRI mode, so we need to
2335 update the operator rankings. */
2336 expr_set_precedence ();
2338 #ifdef MRI_MODE_CHANGE
2340 MRI_MODE_CHANGE (on
);
2343 demand_empty_rest_of_line ();
2346 /* Handle changing the location counter. */
2349 do_org (segT segment
, expressionS
*exp
, int fill
)
2351 if (segment
!= now_seg
&& segment
!= absolute_section
)
2352 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2354 if (now_seg
== absolute_section
)
2357 as_warn (_("ignoring fill value in absolute section"));
2358 if (exp
->X_op
!= O_constant
)
2360 as_bad (_("only constant offsets supported in absolute section"));
2361 exp
->X_add_number
= 0;
2363 abs_section_offset
= exp
->X_add_number
;
2368 symbolS
*sym
= exp
->X_add_symbol
;
2369 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2371 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2373 /* Handle complex expressions. */
2374 sym
= make_expr_symbol (exp
);
2378 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2384 s_org (int ignore ATTRIBUTE_UNUSED
)
2386 register segT segment
;
2388 register long temp_fill
;
2390 #ifdef md_flush_pending_output
2391 md_flush_pending_output ();
2394 /* The m68k MRI assembler has a different meaning for .org. It
2395 means to create an absolute section at a given address. We can't
2396 support that--use a linker script instead. */
2399 as_bad (_("MRI style ORG pseudo-op not supported"));
2400 ignore_rest_of_line ();
2404 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2405 thing as a sub-segment-relative origin. Any absolute origin is
2406 given a warning, then assumed to be segment-relative. Any
2407 segmented origin expression ("foo+42") had better be in the right
2408 segment or the .org is ignored.
2410 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2411 we never know sub-segment sizes when we are reading code. BSD
2412 will crash trying to emit negative numbers of filler bytes in
2413 certain .orgs. We don't crash, but see as-write for that code.
2415 Don't make frag if need_pass_2==1. */
2416 segment
= get_known_segmented_expression (&exp
);
2417 if (*input_line_pointer
== ',')
2419 input_line_pointer
++;
2420 temp_fill
= get_absolute_expression ();
2426 do_org (segment
, &exp
, temp_fill
);
2428 demand_empty_rest_of_line ();
2431 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2432 called by the obj-format routine which handles section changing
2433 when in MRI mode. It will create a new section, and return it. It
2434 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2435 'M' (mixed), or 'R' (romable). If BFD_ASSEMBLER is defined, the
2436 flags will be set in the section. */
2439 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2449 name
= input_line_pointer
;
2450 if (!ISDIGIT (*name
))
2451 c
= get_symbol_end ();
2456 ++input_line_pointer
;
2458 while (ISDIGIT (*input_line_pointer
));
2460 c
= *input_line_pointer
;
2461 *input_line_pointer
= '\0';
2464 name
= xstrdup (name
);
2466 *input_line_pointer
= c
;
2468 seg
= subseg_new (name
, 0);
2470 if (*input_line_pointer
== ',')
2474 ++input_line_pointer
;
2475 align
= get_absolute_expression ();
2476 record_alignment (seg
, align
);
2480 if (*input_line_pointer
== ',')
2482 c
= *++input_line_pointer
;
2484 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
2487 as_bad (_("unrecognized section type"));
2488 ++input_line_pointer
;
2490 #ifdef BFD_ASSEMBLER
2494 flags
= SEC_NO_FLAGS
;
2496 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
2497 else if (*type
== 'D' || *type
== 'M')
2498 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
2499 else if (*type
== 'R')
2500 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
2501 if (flags
!= SEC_NO_FLAGS
)
2503 if (!bfd_set_section_flags (stdoutput
, seg
, flags
))
2504 as_warn (_("error setting flags for \"%s\": %s"),
2505 bfd_section_name (stdoutput
, seg
),
2506 bfd_errmsg (bfd_get_error ()));
2512 /* Ignore the HP type. */
2513 if (*input_line_pointer
== ',')
2514 input_line_pointer
+= 2;
2516 demand_empty_rest_of_line ();
2518 #else /* ! TC_M68K */
2527 name
= input_line_pointer
;
2528 c
= get_symbol_end ();
2530 name
= xstrdup (name
);
2532 *input_line_pointer
= c
;
2534 seg
= subseg_new (name
, 0);
2536 if (*input_line_pointer
!= ',')
2542 ++input_line_pointer
;
2544 sectype
= input_line_pointer
;
2545 c
= get_symbol_end ();
2546 if (*sectype
== '\0')
2548 else if (strcasecmp (sectype
, "text") == 0)
2550 else if (strcasecmp (sectype
, "data") == 0)
2552 else if (strcasecmp (sectype
, "romdata") == 0)
2555 as_warn (_("unrecognized section type `%s'"), sectype
);
2556 *input_line_pointer
= c
;
2559 if (*input_line_pointer
== ',')
2563 ++input_line_pointer
;
2565 seccmd
= input_line_pointer
;
2566 c
= get_symbol_end ();
2567 if (strcasecmp (seccmd
, "absolute") == 0)
2569 as_bad (_("absolute sections are not supported"));
2570 *input_line_pointer
= c
;
2571 ignore_rest_of_line ();
2574 else if (strcasecmp (seccmd
, "align") == 0)
2578 *input_line_pointer
= c
;
2579 align
= get_absolute_expression ();
2580 record_alignment (seg
, align
);
2584 as_warn (_("unrecognized section command `%s'"), seccmd
);
2585 *input_line_pointer
= c
;
2589 demand_empty_rest_of_line ();
2591 #else /* ! TC_I960 */
2592 /* The MRI assembler seems to use different forms of .sect for
2593 different targets. */
2594 as_bad ("MRI mode not supported for this target");
2595 ignore_rest_of_line ();
2596 #endif /* ! TC_I960 */
2597 #endif /* ! TC_M68K */
2600 /* Handle the .print pseudo-op. */
2603 s_print (int ignore ATTRIBUTE_UNUSED
)
2608 s
= demand_copy_C_string (&len
);
2611 demand_empty_rest_of_line ();
2614 /* Handle the .purgem pseudo-op. */
2617 s_purgem (int ignore ATTRIBUTE_UNUSED
)
2619 if (is_it_end_of_statement ())
2621 demand_empty_rest_of_line ();
2631 name
= input_line_pointer
;
2632 c
= get_symbol_end ();
2633 delete_macro (name
);
2634 *input_line_pointer
= c
;
2637 while (*input_line_pointer
++ == ',');
2639 --input_line_pointer
;
2640 demand_empty_rest_of_line ();
2643 /* Handle the .rept pseudo-op. */
2646 s_bad_endr (int ignore ATTRIBUTE_UNUSED
)
2648 as_warn (_(".endr encountered without preceeding .rept, .irc, or .irp"));
2649 demand_empty_rest_of_line ();
2652 /* Handle the .rept pseudo-op. */
2655 s_rept (int ignore ATTRIBUTE_UNUSED
)
2659 count
= get_absolute_expression ();
2661 do_repeat (count
, "REPT", "ENDR");
2664 /* This function provides a generic repeat block implementation. It allows
2665 different directives to be used as the start/end keys. */
2668 do_repeat (int count
, const char *start
, const char *end
)
2674 if (!buffer_and_nest (start
, end
, &one
, get_line_sb
))
2676 as_bad (_("%s without %s"), start
, end
);
2682 sb_add_sb (&many
, &one
);
2686 input_scrub_include_sb (&many
, input_line_pointer
, 1);
2688 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2691 /* Skip to end of current repeat loop; EXTRA indicates how many additional
2692 input buffers to skip. Assumes that conditionals preceding the loop end
2693 are properly nested.
2695 This function makes it easier to implement a premature "break" out of the
2696 loop. The EXTRA arg accounts for other buffers we might have inserted,
2697 such as line substitutions. */
2700 end_repeat (int extra
)
2702 cond_exit_macro (macro_nest
);
2703 while (extra
-- >= 0)
2704 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2707 /* Handle the .equ, .equiv and .set directives. If EQUIV is 1, then
2708 this is .equiv, and it is an error if the symbol is already
2714 register char *name
;
2715 register char delim
;
2716 register char *end_name
;
2717 register symbolS
*symbolP
;
2719 /* Especial apologies for the random logic:
2720 this just grew, and could be parsed much more simply!
2722 name
= input_line_pointer
;
2723 delim
= get_symbol_end ();
2724 end_name
= input_line_pointer
;
2727 if (name
== end_name
)
2729 as_bad (_("expected symbol name"));
2730 discard_rest_of_line ();
2736 if (*input_line_pointer
!= ',')
2739 as_bad (_("expected comma after \"%s\""), name
);
2741 ignore_rest_of_line ();
2745 input_line_pointer
++;
2748 if (name
[0] == '.' && name
[1] == '\0')
2750 /* Turn '. = mumble' into a .org mumble. */
2751 register segT segment
;
2754 segment
= get_known_segmented_expression (&exp
);
2757 do_org (segment
, &exp
, 0);
2763 if ((symbolP
= symbol_find (name
)) == NULL
2764 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
2767 /* When doing symbol listings, play games with dummy fragments living
2768 outside the normal fragment chain to record the file and line info
2770 if (listing
& LISTING_SYMBOLS
)
2772 extern struct list_info_struct
*listing_tail
;
2773 fragS
*dummy_frag
= (fragS
*) xmalloc (sizeof (fragS
));
2774 memset (dummy_frag
, 0, sizeof (fragS
));
2775 dummy_frag
->fr_type
= rs_fill
;
2776 dummy_frag
->line
= listing_tail
;
2777 symbolP
= symbol_new (name
, undefined_section
, 0, dummy_frag
);
2778 dummy_frag
->fr_symbol
= symbolP
;
2782 symbolP
= symbol_new (name
, undefined_section
, 0, &zero_address_frag
);
2785 /* "set" symbols are local unless otherwise specified. */
2786 SF_SET_LOCAL (symbolP
);
2787 #endif /* OBJ_COFF */
2790 symbol_table_insert (symbolP
);
2795 && S_IS_DEFINED (symbolP
)
2796 && S_GET_SEGMENT (symbolP
) != reg_section
)
2797 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (symbolP
));
2799 pseudo_set (symbolP
);
2800 demand_empty_rest_of_line ();
2813 #ifdef md_flush_pending_output
2814 md_flush_pending_output ();
2818 stop
= mri_comment_field (&stopc
);
2820 /* In m68k MRI mode, we need to align to a word boundary, unless
2822 if (flag_m68k_mri
&& mult
> 1)
2824 if (now_seg
== absolute_section
)
2826 abs_section_offset
+= abs_section_offset
& 1;
2827 if (line_label
!= NULL
)
2828 S_SET_VALUE (line_label
, abs_section_offset
);
2830 else if (mri_common_symbol
!= NULL
)
2834 val
= S_GET_VALUE (mri_common_symbol
);
2837 S_SET_VALUE (mri_common_symbol
, val
+ 1);
2838 if (line_label
!= NULL
)
2840 expressionS
*symexp
;
2842 symexp
= symbol_get_value_expression (line_label
);
2843 know (symexp
->X_op
== O_symbol
);
2844 know (symexp
->X_add_symbol
== mri_common_symbol
);
2845 symexp
->X_add_number
+= 1;
2851 do_align (1, (char *) NULL
, 0, 0);
2852 if (line_label
!= NULL
)
2854 symbol_set_frag (line_label
, frag_now
);
2855 S_SET_VALUE (line_label
, frag_now_fix ());
2865 if (*input_line_pointer
== ',')
2867 ++input_line_pointer
;
2872 val
.X_op
= O_constant
;
2873 val
.X_add_number
= 0;
2876 if (val
.X_op
!= O_constant
2877 || val
.X_add_number
< - 0x80
2878 || val
.X_add_number
> 0xff
2879 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
2881 if (exp
.X_op
!= O_constant
)
2882 as_bad (_("unsupported variable size or fill value"));
2889 bytes
= mult
* exp
.X_add_number
;
2890 for (i
= 0; i
< exp
.X_add_number
; i
++)
2891 emit_expr (&val
, mult
);
2896 if (exp
.X_op
== O_constant
)
2900 repeat
= exp
.X_add_number
;
2907 as_warn (_(".space repeat count is zero, ignored"));
2908 else if (repeat
< 0)
2909 as_warn (_(".space repeat count is negative, ignored"));
2913 /* If we are in the absolute section, just bump the offset. */
2914 if (now_seg
== absolute_section
)
2916 abs_section_offset
+= repeat
;
2920 /* If we are secretly in an MRI common section, then
2921 creating space just increases the size of the common
2923 if (mri_common_symbol
!= NULL
)
2925 S_SET_VALUE (mri_common_symbol
,
2926 S_GET_VALUE (mri_common_symbol
) + repeat
);
2931 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
2932 (offsetT
) repeat
, (char *) 0);
2936 if (now_seg
== absolute_section
)
2938 as_bad (_("space allocation too complex in absolute section"));
2939 subseg_set (text_section
, 0);
2942 if (mri_common_symbol
!= NULL
)
2944 as_bad (_("space allocation too complex in common section"));
2945 mri_common_symbol
= NULL
;
2949 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
2950 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
2954 *p
= val
.X_add_number
;
2959 /* In MRI mode, after an odd number of bytes, we must align to an
2960 even word boundary, unless the next instruction is a dc.b, ds.b
2962 if (flag_mri
&& (bytes
& 1) != 0)
2963 mri_pending_align
= 1;
2965 demand_empty_rest_of_line ();
2968 mri_comment_end (stop
, stopc
);
2971 /* This is like s_space, but the value is a floating point number with
2972 the given precision. This is for the MRI dcb.s pseudo-op and
2976 s_float_space (int float_type
)
2980 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
2985 stop
= mri_comment_field (&stopc
);
2987 count
= get_absolute_expression ();
2990 if (*input_line_pointer
!= ',')
2992 as_bad (_("missing value"));
2993 ignore_rest_of_line ();
2995 mri_comment_end (stop
, stopc
);
2999 ++input_line_pointer
;
3003 /* Skip any 0{letter} that may be present. Don't even check if the
3004 * letter is legal. */
3005 if (input_line_pointer
[0] == '0'
3006 && ISALPHA (input_line_pointer
[1]))
3007 input_line_pointer
+= 2;
3009 /* Accept :xxxx, where the x's are hex digits, for a floating point
3010 with the exact digits specified. */
3011 if (input_line_pointer
[0] == ':')
3013 flen
= hex_float (float_type
, temp
);
3016 ignore_rest_of_line ();
3018 mri_comment_end (stop
, stopc
);
3026 err
= md_atof (float_type
, temp
, &flen
);
3027 know (flen
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3031 as_bad (_("bad floating literal: %s"), err
);
3032 ignore_rest_of_line ();
3034 mri_comment_end (stop
, stopc
);
3039 while (--count
>= 0)
3043 p
= frag_more (flen
);
3044 memcpy (p
, temp
, (unsigned int) flen
);
3047 demand_empty_rest_of_line ();
3050 mri_comment_end (stop
, stopc
);
3053 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3056 s_struct (int ignore ATTRIBUTE_UNUSED
)
3062 stop
= mri_comment_field (&stopc
);
3063 abs_section_offset
= get_absolute_expression ();
3064 subseg_set (absolute_section
, 0);
3065 demand_empty_rest_of_line ();
3067 mri_comment_end (stop
, stopc
);
3071 s_text (int ignore ATTRIBUTE_UNUSED
)
3075 temp
= get_absolute_expression ();
3076 subseg_set (text_section
, (subsegT
) temp
);
3077 demand_empty_rest_of_line ();
3079 const_flag
&= ~IN_DEFAULT_SECTION
;
3084 /* Verify that we are at the end of a line. If not, issue an error and
3088 demand_empty_rest_of_line (void)
3091 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3092 input_line_pointer
++;
3095 if (ISPRINT (*input_line_pointer
))
3096 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3097 *input_line_pointer
);
3099 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3100 *input_line_pointer
);
3101 ignore_rest_of_line ();
3104 /* Return pointing just after end-of-line. */
3105 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3108 /* Silently advance to the end of line. Use this after already having
3109 issued an error about something bad. */
3112 ignore_rest_of_line (void)
3114 while (input_line_pointer
< buffer_limit
3115 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3116 input_line_pointer
++;
3118 input_line_pointer
++;
3120 /* Return pointing just after end-of-line. */
3121 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3125 discard_rest_of_line (void)
3127 while (input_line_pointer
< buffer_limit
3128 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3129 input_line_pointer
++;
3131 input_line_pointer
++;
3133 /* Return pointing just after end-of-line. */
3134 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3137 /* In: Pointer to a symbol.
3138 Input_line_pointer->expression.
3140 Out: Input_line_pointer->just after any whitespace after expression.
3141 Tried to set symbol to value of expression.
3142 Will change symbols type, value, and frag; */
3145 pseudo_set (symbolS
*symbolP
)
3148 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3150 #endif /* OBJ_AOUT or OBJ_BOUT */
3152 know (symbolP
); /* NULL pointer is logic error. */
3153 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3154 ext
= S_IS_EXTERNAL (symbolP
);
3155 #endif /* OBJ_AOUT or OBJ_BOUT */
3157 (void) expression (&exp
);
3159 if (exp
.X_op
== O_illegal
)
3160 as_bad (_("illegal expression"));
3161 else if (exp
.X_op
== O_absent
)
3162 as_bad (_("missing expression"));
3163 else if (exp
.X_op
== O_big
)
3165 if (exp
.X_add_number
> 0)
3166 as_bad (_("bignum invalid"));
3168 as_bad (_("floating point number invalid"));
3170 else if (exp
.X_op
== O_subtract
3171 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
3172 && (symbol_get_frag (exp
.X_add_symbol
)
3173 == symbol_get_frag (exp
.X_op_symbol
)))
3175 exp
.X_op
= O_constant
;
3176 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
3177 - S_GET_VALUE (exp
.X_op_symbol
));
3185 exp
.X_add_number
= 0;
3188 S_SET_SEGMENT (symbolP
, absolute_section
);
3189 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3191 S_SET_EXTERNAL (symbolP
);
3193 S_CLEAR_EXTERNAL (symbolP
);
3194 #endif /* OBJ_AOUT or OBJ_BOUT */
3195 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3196 if (exp
.X_op
!= O_constant
)
3197 symbol_set_frag (symbolP
, &zero_address_frag
);
3201 S_SET_SEGMENT (symbolP
, reg_section
);
3202 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3203 symbol_set_frag (symbolP
, &zero_address_frag
);
3207 if (S_GET_SEGMENT (exp
.X_add_symbol
) == undefined_section
3208 || exp
.X_add_number
!= 0)
3209 symbol_set_value_expression (symbolP
, &exp
);
3210 else if (symbol_section_p (symbolP
))
3211 as_bad ("attempt to set value of section symbol");
3214 symbolS
*s
= exp
.X_add_symbol
;
3216 S_SET_SEGMENT (symbolP
, S_GET_SEGMENT (s
));
3217 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3219 S_SET_EXTERNAL (symbolP
);
3221 S_CLEAR_EXTERNAL (symbolP
);
3222 #endif /* OBJ_AOUT or OBJ_BOUT */
3223 S_SET_VALUE (symbolP
,
3224 exp
.X_add_number
+ S_GET_VALUE (s
));
3225 symbol_set_frag (symbolP
, symbol_get_frag (s
));
3226 copy_symbol_attributes (symbolP
, s
);
3231 /* The value is some complex expression.
3232 FIXME: Should we set the segment to anything? */
3233 symbol_set_value_expression (symbolP
, &exp
);
3240 CONStruct more frag of .bytes, or .words etc.
3241 Should need_pass_2 be 1 then emit no frag(s).
3242 This understands EXPRESSIONS.
3246 This has a split personality. We use expression() to read the
3247 value. We can detect if the value won't fit in a byte or word.
3248 But we can't detect if expression() discarded significant digits
3249 in the case of a long. Not worth the crocks required to fix it. */
3251 /* Select a parser for cons expressions. */
3253 /* Some targets need to parse the expression in various fancy ways.
3254 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3255 (for example, the HPPA does this). Otherwise, you can define
3256 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3257 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3258 are defined, which is the normal case, then only simple expressions
3263 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
3266 #ifndef TC_PARSE_CONS_EXPRESSION
3267 #ifdef BITFIELD_CONS_EXPRESSIONS
3268 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3270 parse_bitfield_cons (expressionS
*exp
, unsigned int nbytes
);
3272 #ifdef REPEAT_CONS_EXPRESSIONS
3273 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3275 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
3278 /* If we haven't gotten one yet, just call expression. */
3279 #ifndef TC_PARSE_CONS_EXPRESSION
3280 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3285 do_parse_cons_expression (expressionS
*exp
,
3286 int nbytes ATTRIBUTE_UNUSED
)
3288 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3292 /* Worker to do .byte etc statements.
3293 Clobbers input_line_pointer and checks end-of-line. */
3296 cons_worker (register int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
3304 #ifdef md_flush_pending_output
3305 md_flush_pending_output ();
3309 stop
= mri_comment_field (&stopc
);
3311 if (is_it_end_of_statement ())
3313 demand_empty_rest_of_line ();
3315 mri_comment_end (stop
, stopc
);
3319 #ifdef md_cons_align
3320 md_cons_align (nbytes
);
3328 parse_mri_cons (&exp
, (unsigned int) nbytes
);
3331 TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
3335 if (exp
.X_op
== O_symbol
)
3336 exp
.X_op
= O_symbol_rva
;
3338 as_fatal (_("rva without symbol"));
3340 emit_expr (&exp
, (unsigned int) nbytes
);
3343 while (*input_line_pointer
++ == ',');
3345 /* In MRI mode, after an odd number of bytes, we must align to an
3346 even word boundary, unless the next instruction is a dc.b, ds.b
3348 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
3349 mri_pending_align
= 1;
3351 input_line_pointer
--; /* Put terminator back into stream. */
3353 demand_empty_rest_of_line ();
3356 mri_comment_end (stop
, stopc
);
3362 cons_worker (size
, 0);
3368 cons_worker (size
, 1);
3371 /* Put the contents of expression EXP into the object file using
3372 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3375 emit_expr (expressionS
*exp
, unsigned int nbytes
)
3379 valueT extra_digit
= 0;
3381 /* Don't do anything if we are going to make another pass. */
3385 dot_value
= frag_now_fix ();
3389 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3390 appear as a four byte positive constant in the .line section,
3391 followed by a 2 byte 0xffff. Look for that case here. */
3393 static int dwarf_line
= -1;
3395 if (strcmp (segment_name (now_seg
), ".line") != 0)
3397 else if (dwarf_line
>= 0
3399 && exp
->X_op
== O_constant
3400 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
3401 listing_source_line ((unsigned int) dwarf_line
);
3402 else if (nbytes
== 4
3403 && exp
->X_op
== O_constant
3404 && exp
->X_add_number
>= 0)
3405 dwarf_line
= exp
->X_add_number
;
3410 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3411 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3412 AT_sibling (0x12) followed by a four byte address of the sibling
3413 followed by a 2 byte AT_name (0x38) followed by the name of the
3414 file. We look for that case here. */
3416 static int dwarf_file
= 0;
3418 if (strcmp (segment_name (now_seg
), ".debug") != 0)
3420 else if (dwarf_file
== 0
3422 && exp
->X_op
== O_constant
3423 && exp
->X_add_number
== 0x11)
3425 else if (dwarf_file
== 1
3427 && exp
->X_op
== O_constant
3428 && exp
->X_add_number
== 0x12)
3430 else if (dwarf_file
== 2
3433 else if (dwarf_file
== 3
3435 && exp
->X_op
== O_constant
3436 && exp
->X_add_number
== 0x38)
3441 /* The variable dwarf_file_string tells stringer that the string
3442 may be the name of the source file. */
3443 if (dwarf_file
== 4)
3444 dwarf_file_string
= 1;
3446 dwarf_file_string
= 0;
3451 if (check_eh_frame (exp
, &nbytes
))
3456 /* Allow `.word 0' in the absolute section. */
3457 if (now_seg
== absolute_section
)
3459 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
3460 as_bad (_("attempt to store value in absolute section"));
3461 abs_section_offset
+= nbytes
;
3465 /* Handle a negative bignum. */
3467 && exp
->X_add_number
== 0
3468 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
3469 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
3472 unsigned long carry
;
3474 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
3476 /* Negate the bignum: one's complement each digit and add 1. */
3478 for (i
= 0; i
< exp
->X_add_number
; i
++)
3482 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
3485 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
3486 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
3489 /* We can ignore any carry out, because it will be handled by
3490 extra_digit if it is needed. */
3492 extra_digit
= (valueT
) -1;
3496 if (op
== O_absent
|| op
== O_illegal
)
3498 as_warn (_("zero assumed for missing expression"));
3499 exp
->X_add_number
= 0;
3502 else if (op
== O_big
&& exp
->X_add_number
<= 0)
3504 as_bad (_("floating point number invalid"));
3505 exp
->X_add_number
= 0;
3508 else if (op
== O_register
)
3510 as_warn (_("register value used as expression"));
3514 p
= frag_more ((int) nbytes
);
3516 #ifndef WORKING_DOT_WORD
3517 /* If we have the difference of two symbols in a word, save it on
3518 the broken_words list. See the code in write.c. */
3519 if (op
== O_subtract
&& nbytes
== 2)
3521 struct broken_word
*x
;
3523 x
= (struct broken_word
*) xmalloc (sizeof (struct broken_word
));
3524 x
->next_broken_word
= broken_words
;
3527 x
->subseg
= now_subseg
;
3529 x
->word_goes_here
= p
;
3531 x
->add
= exp
->X_add_symbol
;
3532 x
->sub
= exp
->X_op_symbol
;
3533 x
->addnum
= exp
->X_add_number
;
3541 /* If we have an integer, but the number of bytes is too large to
3542 pass to md_number_to_chars, handle it as a bignum. */
3543 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
3548 if (!exp
->X_unsigned
&& exp
->X_add_number
< 0)
3549 extra_digit
= (valueT
) -1;
3550 val
= (valueT
) exp
->X_add_number
;
3554 generic_bignum
[gencnt
] = val
& LITTLENUM_MASK
;
3555 val
>>= LITTLENUM_NUMBER_OF_BITS
;
3559 op
= exp
->X_op
= O_big
;
3560 exp
->X_add_number
= gencnt
;
3563 if (op
== O_constant
)
3565 register valueT get
;
3566 register valueT use
;
3567 register valueT mask
;
3569 register valueT unmask
;
3571 /* JF << of >= number of bits in the object is undefined. In
3572 particular SPARC (Sun 4) has problems. */
3573 if (nbytes
>= sizeof (valueT
))
3576 if (nbytes
> sizeof (valueT
))
3579 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
3583 /* Don't store these bits. */
3584 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
3585 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
3588 unmask
= ~mask
; /* Do store these bits. */
3591 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3592 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
3595 get
= exp
->X_add_number
;
3597 if ((get
& mask
) != 0
3598 && ((get
& mask
) != mask
3599 || (get
& hibit
) == 0))
3600 { /* Leading bits contain both 0s & 1s. */
3601 as_warn (_("value 0x%lx truncated to 0x%lx"),
3602 (unsigned long) get
, (unsigned long) use
);
3604 /* Put bytes in right order. */
3605 md_number_to_chars (p
, use
, (int) nbytes
);
3607 else if (op
== O_big
)
3610 LITTLENUM_TYPE
*nums
;
3612 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
3614 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
3617 as_warn (_("bignum truncated to %d bytes"), nbytes
);
3621 if (target_big_endian
)
3623 while (nbytes
> size
)
3625 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
3626 nbytes
-= CHARS_PER_LITTLENUM
;
3627 p
+= CHARS_PER_LITTLENUM
;
3630 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
3631 while (size
>= CHARS_PER_LITTLENUM
)
3634 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
3635 size
-= CHARS_PER_LITTLENUM
;
3636 p
+= CHARS_PER_LITTLENUM
;
3641 nums
= generic_bignum
;
3642 while (size
>= CHARS_PER_LITTLENUM
)
3644 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
3646 size
-= CHARS_PER_LITTLENUM
;
3647 p
+= CHARS_PER_LITTLENUM
;
3648 nbytes
-= CHARS_PER_LITTLENUM
;
3651 while (nbytes
>= CHARS_PER_LITTLENUM
)
3653 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
3654 nbytes
-= CHARS_PER_LITTLENUM
;
3655 p
+= CHARS_PER_LITTLENUM
;
3661 memset (p
, 0, nbytes
);
3663 /* Now we need to generate a fixS to record the symbol value.
3664 This is easy for BFD. For other targets it can be more
3665 complex. For very complex cases (currently, the HPPA and
3666 NS32K), you can define TC_CONS_FIX_NEW to do whatever you
3667 want. For simpler cases, you can define TC_CONS_RELOC to be
3668 the name of the reloc code that should be stored in the fixS.
3669 If neither is defined, the code uses NO_RELOC if it is
3670 defined, and otherwise uses 0. */
3672 #ifdef BFD_ASSEMBLER
3673 #ifdef TC_CONS_FIX_NEW
3674 TC_CONS_FIX_NEW (frag_now
, p
- frag_now
->fr_literal
, nbytes
, exp
);
3677 bfd_reloc_code_real_type r
;
3694 as_bad (_("unsupported BFD relocation size %u"), nbytes
);
3698 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, (int) nbytes
, exp
,
3703 #ifdef TC_CONS_FIX_NEW
3704 TC_CONS_FIX_NEW (frag_now
, p
- frag_now
->fr_literal
, nbytes
, exp
);
3706 /* Figure out which reloc number to use. Use TC_CONS_RELOC if
3707 it is defined, otherwise use NO_RELOC if it is defined,
3709 #ifndef TC_CONS_RELOC
3711 #define TC_CONS_RELOC NO_RELOC
3713 #define TC_CONS_RELOC 0
3716 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, (int) nbytes
, exp
, 0,
3718 #endif /* TC_CONS_FIX_NEW */
3719 #endif /* BFD_ASSEMBLER */
3723 #ifdef BITFIELD_CONS_EXPRESSIONS
3725 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3726 w:x,y:z, where w and y are bitwidths and x and y are values. They
3727 then pack them all together. We do a little better in that we allow
3728 them in words, longs, etc. and we'll pack them in target byte order
3731 The rules are: pack least significant bit first, if a field doesn't
3732 entirely fit, put it in the next unit. Overflowing the bitfield is
3733 explicitly *not* even a warning. The bitwidth should be considered
3736 To use this function the tc-XXX.h file should define
3737 BITFIELD_CONS_EXPRESSIONS. */
3740 parse_bitfield_cons (exp
, nbytes
)
3742 unsigned int nbytes
;
3744 unsigned int bits_available
= BITS_PER_CHAR
* nbytes
;
3745 char *hold
= input_line_pointer
;
3747 (void) expression (exp
);
3749 if (*input_line_pointer
== ':')
3756 unsigned long width
;
3758 if (*input_line_pointer
!= ':')
3760 input_line_pointer
= hold
;
3762 } /* Next piece is not a bitfield. */
3764 /* In the general case, we can't allow
3765 full expressions with symbol
3766 differences and such. The relocation
3767 entries for symbols not defined in this
3768 assembly would require arbitrary field
3769 widths, positions, and masks which most
3770 of our current object formats don't
3773 In the specific case where a symbol
3774 *is* defined in this assembly, we
3775 *could* build fixups and track it, but
3776 this could lead to confusion for the
3777 backends. I'm lazy. I'll take any
3778 SEG_ABSOLUTE. I think that means that
3779 you can use a previous .set or
3780 .equ type symbol. xoxorich. */
3782 if (exp
->X_op
== O_absent
)
3784 as_warn (_("using a bit field width of zero"));
3785 exp
->X_add_number
= 0;
3786 exp
->X_op
= O_constant
;
3787 } /* Implied zero width bitfield. */
3789 if (exp
->X_op
!= O_constant
)
3791 *input_line_pointer
= '\0';
3792 as_bad (_("field width \"%s\" too complex for a bitfield"), hold
);
3793 *input_line_pointer
= ':';
3794 demand_empty_rest_of_line ();
3796 } /* Too complex. */
3798 if ((width
= exp
->X_add_number
) > (BITS_PER_CHAR
* nbytes
))
3800 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
3801 width
, nbytes
, (BITS_PER_CHAR
* nbytes
));
3802 width
= BITS_PER_CHAR
* nbytes
;
3805 if (width
> bits_available
)
3807 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
3808 input_line_pointer
= hold
;
3809 exp
->X_add_number
= value
;
3814 hold
= ++input_line_pointer
;
3816 (void) expression (exp
);
3817 if (exp
->X_op
!= O_constant
)
3819 char cache
= *input_line_pointer
;
3821 *input_line_pointer
= '\0';
3822 as_bad (_("field value \"%s\" too complex for a bitfield"), hold
);
3823 *input_line_pointer
= cache
;
3824 demand_empty_rest_of_line ();
3826 } /* Too complex. */
3828 value
|= ((~(-1 << width
) & exp
->X_add_number
)
3829 << ((BITS_PER_CHAR
* nbytes
) - bits_available
));
3831 if ((bits_available
-= width
) == 0
3832 || is_it_end_of_statement ()
3833 || *input_line_pointer
!= ',')
3836 } /* All the bitfields we're gonna get. */
3838 hold
= ++input_line_pointer
;
3839 (void) expression (exp
);
3842 exp
->X_add_number
= value
;
3843 exp
->X_op
= O_constant
;
3844 exp
->X_unsigned
= 1;
3848 #endif /* BITFIELD_CONS_EXPRESSIONS */
3850 /* Handle an MRI style string expression. */
3854 parse_mri_cons (exp
, nbytes
)
3856 unsigned int nbytes
;
3858 if (*input_line_pointer
!= '\''
3859 && (input_line_pointer
[1] != '\''
3860 || (*input_line_pointer
!= 'A'
3861 && *input_line_pointer
!= 'E')))
3862 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3866 unsigned int result
= 0;
3868 /* An MRI style string. Cut into as many bytes as will fit into
3869 a nbyte chunk, left justify if necessary, and separate with
3870 commas so we can try again later. */
3871 if (*input_line_pointer
== 'A')
3872 ++input_line_pointer
;
3873 else if (*input_line_pointer
== 'E')
3875 as_bad (_("EBCDIC constants are not supported"));
3876 ++input_line_pointer
;
3879 input_line_pointer
++;
3880 for (scan
= 0; scan
< nbytes
; scan
++)
3882 if (*input_line_pointer
== '\'')
3884 if (input_line_pointer
[1] == '\'')
3886 input_line_pointer
++;
3891 result
= (result
<< 8) | (*input_line_pointer
++);
3895 while (scan
< nbytes
)
3901 /* Create correct expression. */
3902 exp
->X_op
= O_constant
;
3903 exp
->X_add_number
= result
;
3905 /* Fake it so that we can read the next char too. */
3906 if (input_line_pointer
[0] != '\'' ||
3907 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
3909 input_line_pointer
-= 2;
3910 input_line_pointer
[0] = ',';
3911 input_line_pointer
[1] = '\'';
3914 input_line_pointer
++;
3917 #endif /* TC_M68K */
3919 #ifdef REPEAT_CONS_EXPRESSIONS
3921 /* Parse a repeat expression for cons. This is used by the MIPS
3922 assembler. The format is NUMBER:COUNT; NUMBER appears in the
3923 object file COUNT times.
3925 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
3928 parse_repeat_cons (exp
, nbytes
)
3930 unsigned int nbytes
;
3937 if (*input_line_pointer
!= ':')
3939 /* No repeat count. */
3943 ++input_line_pointer
;
3944 expression (&count
);
3945 if (count
.X_op
!= O_constant
3946 || count
.X_add_number
<= 0)
3948 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
3952 /* The cons function is going to output this expression once. So we
3953 output it count - 1 times. */
3954 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
3955 emit_expr (exp
, nbytes
);
3958 #endif /* REPEAT_CONS_EXPRESSIONS */
3960 /* Parse a floating point number represented as a hex constant. This
3961 permits users to specify the exact bits they want in the floating
3965 hex_float (int float_type
, char *bytes
)
3997 as_bad (_("unknown floating type type '%c'"), float_type
);
4001 /* It would be nice if we could go through expression to parse the
4002 hex constant, but if we get a bignum it's a pain to sort it into
4003 the buffer correctly. */
4005 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4009 /* The MRI assembler accepts arbitrary underscores strewn about
4010 through the hex constant, so we ignore them as well. */
4011 if (*input_line_pointer
== '_')
4013 ++input_line_pointer
;
4019 as_warn (_("floating point constant too large"));
4022 d
= hex_value (*input_line_pointer
) << 4;
4023 ++input_line_pointer
;
4024 while (*input_line_pointer
== '_')
4025 ++input_line_pointer
;
4026 if (hex_p (*input_line_pointer
))
4028 d
+= hex_value (*input_line_pointer
);
4029 ++input_line_pointer
;
4031 if (target_big_endian
)
4034 bytes
[length
- i
- 1] = d
;
4040 if (target_big_endian
)
4041 memset (bytes
+ i
, 0, length
- i
);
4043 memset (bytes
, 0, length
- i
);
4051 CONStruct some more frag chars of .floats .ffloats etc.
4052 Makes 0 or more new frags.
4053 If need_pass_2 == 1, no frags are emitted.
4054 This understands only floating literals, not expressions. Sorry.
4056 A floating constant is defined by atof_generic(), except it is preceded
4057 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4058 reading, I decided to be incompatible. This always tries to give you
4059 rounded bits to the precision of the pseudo-op. Former AS did premature
4060 truncation, restored noisy bits instead of trailing 0s AND gave you
4061 a choice of 2 flavours of noise according to which of 2 floating-point
4062 scanners you directed AS to use.
4064 In: input_line_pointer->whitespace before, or '0' of flonum. */
4067 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4068 register int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4071 int length
; /* Number of chars in an object. */
4072 register char *err
; /* Error from scanning floating literal. */
4073 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4075 if (is_it_end_of_statement ())
4077 demand_empty_rest_of_line ();
4081 #ifdef md_flush_pending_output
4082 md_flush_pending_output ();
4087 /* input_line_pointer->1st char of a flonum (we hope!). */
4090 /* Skip any 0{letter} that may be present. Don't even check if the
4091 letter is legal. Someone may invent a "z" format and this routine
4092 has no use for such information. Lusers beware: you get
4093 diagnostics if your input is ill-conditioned. */
4094 if (input_line_pointer
[0] == '0'
4095 && ISALPHA (input_line_pointer
[1]))
4096 input_line_pointer
+= 2;
4098 /* Accept :xxxx, where the x's are hex digits, for a floating
4099 point with the exact digits specified. */
4100 if (input_line_pointer
[0] == ':')
4102 ++input_line_pointer
;
4103 length
= hex_float (float_type
, temp
);
4106 ignore_rest_of_line ();
4112 err
= md_atof (float_type
, temp
, &length
);
4113 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
4117 as_bad (_("bad floating literal: %s"), err
);
4118 ignore_rest_of_line ();
4129 #ifdef REPEAT_CONS_EXPRESSIONS
4130 if (*input_line_pointer
== ':')
4132 expressionS count_exp
;
4134 ++input_line_pointer
;
4135 expression (&count_exp
);
4137 if (count_exp
.X_op
!= O_constant
4138 || count_exp
.X_add_number
<= 0)
4139 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4141 count
= count_exp
.X_add_number
;
4145 while (--count
>= 0)
4147 p
= frag_more (length
);
4148 memcpy (p
, temp
, (unsigned int) length
);
4153 while (*input_line_pointer
++ == ',');
4155 /* Put terminator back into stream. */
4156 --input_line_pointer
;
4157 demand_empty_rest_of_line ();
4160 /* Return the size of a LEB128 value. */
4163 sizeof_sleb128 (offsetT value
)
4165 register int size
= 0;
4166 register unsigned byte
;
4170 byte
= (value
& 0x7f);
4171 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4172 Fortunately, we can structure things so that the extra work reduces
4173 to a noop on systems that do things "properly". */
4174 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4177 while (!(((value
== 0) && ((byte
& 0x40) == 0))
4178 || ((value
== -1) && ((byte
& 0x40) != 0))));
4184 sizeof_uleb128 (valueT value
)
4186 register int size
= 0;
4187 register unsigned byte
;
4191 byte
= (value
& 0x7f);
4201 sizeof_leb128 (valueT value
, int sign
)
4204 return sizeof_sleb128 ((offsetT
) value
);
4206 return sizeof_uleb128 (value
);
4209 /* Output a LEB128 value. */
4212 output_sleb128 (char *p
, offsetT value
)
4214 register char *orig
= p
;
4219 unsigned byte
= (value
& 0x7f);
4221 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4222 Fortunately, we can structure things so that the extra work reduces
4223 to a noop on systems that do things "properly". */
4224 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4226 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
4227 || ((value
== -1) && ((byte
& 0x40) != 0))));
4239 output_uleb128 (char *p
, valueT value
)
4245 unsigned byte
= (value
& 0x7f);
4248 /* More bytes to follow. */
4259 output_leb128 (char *p
, valueT value
, int sign
)
4262 return output_sleb128 (p
, (offsetT
) value
);
4264 return output_uleb128 (p
, value
);
4267 /* Do the same for bignums. We combine sizeof with output here in that
4268 we don't output for NULL values of P. It isn't really as critical as
4269 for "normal" values that this be streamlined. */
4272 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4279 /* Strip leading sign extensions off the bignum. */
4280 while (size
> 0 && bignum
[size
- 1] == (LITTLENUM_TYPE
) -1)
4285 if (loaded
< 7 && size
> 0)
4287 val
|= (*bignum
<< loaded
);
4288 loaded
+= 8 * CHARS_PER_LITTLENUM
;
4299 if ((val
== 0 && (byte
& 0x40) == 0)
4300 || (~(val
| ~(((valueT
) 1 << loaded
) - 1)) == 0
4301 && (byte
& 0x40) != 0))
4309 while (byte
& 0x80);
4315 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4322 /* Strip leading zeros off the bignum. */
4323 /* XXX: Is this needed? */
4324 while (size
> 0 && bignum
[size
- 1] == 0)
4329 if (loaded
< 7 && size
> 0)
4331 val
|= (*bignum
<< loaded
);
4332 loaded
+= 8 * CHARS_PER_LITTLENUM
;
4341 if (size
> 0 || val
)
4348 while (byte
& 0x80);
4354 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
, int sign
)
4357 return output_big_sleb128 (p
, bignum
, size
);
4359 return output_big_uleb128 (p
, bignum
, size
);
4362 /* Generate the appropriate fragments for a given expression to emit a
4366 emit_leb128_expr (expressionS
*exp
, int sign
)
4368 operatorT op
= exp
->X_op
;
4371 if (op
== O_absent
|| op
== O_illegal
)
4373 as_warn (_("zero assumed for missing expression"));
4374 exp
->X_add_number
= 0;
4377 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4379 as_bad (_("floating point number invalid"));
4380 exp
->X_add_number
= 0;
4383 else if (op
== O_register
)
4385 as_warn (_("register value used as expression"));
4389 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
4390 a signal that this is leb128 data. It shouldn't optimize this away. */
4392 if (check_eh_frame (exp
, &nbytes
))
4395 /* Let the backend know that subsequent data may be byte aligned. */
4396 #ifdef md_cons_align
4400 if (op
== O_constant
)
4402 /* If we've got a constant, emit the thing directly right now. */
4404 valueT value
= exp
->X_add_number
;
4408 size
= sizeof_leb128 (value
, sign
);
4409 p
= frag_more (size
);
4410 output_leb128 (p
, value
, sign
);
4412 else if (op
== O_big
)
4414 /* O_big is a different sort of constant. */
4419 size
= output_big_leb128 (NULL
, generic_bignum
, exp
->X_add_number
, sign
);
4420 p
= frag_more (size
);
4421 output_big_leb128 (p
, generic_bignum
, exp
->X_add_number
, sign
);
4425 /* Otherwise, we have to create a variable sized fragment and
4426 resolve things later. */
4428 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
4429 make_expr_symbol (exp
), 0, (char *) NULL
);
4433 /* Parse the .sleb128 and .uleb128 pseudos. */
4440 #ifdef md_flush_pending_output
4441 md_flush_pending_output ();
4447 emit_leb128_expr (&exp
, sign
);
4449 while (*input_line_pointer
++ == ',');
4451 input_line_pointer
--;
4452 demand_empty_rest_of_line ();
4455 /* We read 0 or more ',' separated, double-quoted strings.
4456 Caller should have checked need_pass_2 is FALSE because we don't
4460 stringer (/* Worker to do .ascii etc statements. */
4461 /* Checks end-of-line. */
4462 register int append_zero
/* 0: don't append '\0', else 1. */)
4464 register unsigned int c
;
4467 #ifdef md_flush_pending_output
4468 md_flush_pending_output ();
4471 /* The following awkward logic is to parse ZERO or more strings,
4472 comma separated. Recall a string expression includes spaces
4473 before the opening '\"' and spaces after the closing '\"'.
4474 We fake a leading ',' if there is (supposed to be)
4475 a 1st, expression. We keep demanding expressions for each ','. */
4476 if (is_it_end_of_statement ())
4478 c
= 0; /* Skip loop. */
4479 ++input_line_pointer
; /* Compensate for end of loop. */
4483 c
= ','; /* Do loop. */
4485 /* If we have been switched into the abs_section then we
4486 will not have an obstack onto which we can hang strings. */
4487 if (now_seg
== absolute_section
)
4489 as_bad (_("strings must be placed into a section"));
4491 ignore_rest_of_line ();
4494 while (c
== ',' || c
== '<' || c
== '"')
4497 switch (*input_line_pointer
)
4500 ++input_line_pointer
; /*->1st char of string. */
4501 start
= input_line_pointer
;
4502 while (is_a_char (c
= next_char_of_string ()))
4504 FRAG_APPEND_1_CHAR (c
);
4508 FRAG_APPEND_1_CHAR (0);
4510 know (input_line_pointer
[-1] == '\"');
4514 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
4515 will emit .string with a filename in the .debug section
4516 after a sequence of constants. See the comment in
4517 emit_expr for the sequence. emit_expr will set
4518 dwarf_file_string to non-zero if this string might be a
4519 source file name. */
4520 if (strcmp (segment_name (now_seg
), ".debug") != 0)
4521 dwarf_file_string
= 0;
4522 else if (dwarf_file_string
)
4524 c
= input_line_pointer
[-1];
4525 input_line_pointer
[-1] = '\0';
4526 listing_source_file (start
);
4527 input_line_pointer
[-1] = c
;
4534 input_line_pointer
++;
4535 c
= get_single_number ();
4536 FRAG_APPEND_1_CHAR (c
);
4537 if (*input_line_pointer
!= '>')
4539 as_bad (_("expected <nn>"));
4541 input_line_pointer
++;
4544 input_line_pointer
++;
4548 c
= *input_line_pointer
;
4551 demand_empty_rest_of_line ();
4554 /* FIXME-SOMEDAY: I had trouble here on characters with the
4555 high bits set. We'll probably also have trouble with
4556 multibyte chars, wide chars, etc. Also be careful about
4557 returning values bigger than 1 byte. xoxorich. */
4560 next_char_of_string (void)
4562 register unsigned int c
;
4564 c
= *input_line_pointer
++ & CHAR_MASK
;
4572 as_warn (_("unterminated string; newline inserted"));
4573 bump_line_counters ();
4576 #ifndef NO_STRING_ESCAPES
4578 switch (c
= *input_line_pointer
++)
4606 break; /* As itself. */
4622 for (i
= 0, number
= 0;
4623 ISDIGIT (c
) && i
< 3;
4624 c
= *input_line_pointer
++, i
++)
4626 number
= number
* 8 + c
- '0';
4631 --input_line_pointer
;
4640 c
= *input_line_pointer
++;
4641 while (ISXDIGIT (c
))
4644 number
= number
* 16 + c
- '0';
4645 else if (ISUPPER (c
))
4646 number
= number
* 16 + c
- 'A' + 10;
4648 number
= number
* 16 + c
- 'a' + 10;
4649 c
= *input_line_pointer
++;
4652 --input_line_pointer
;
4657 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
4658 as_warn (_("unterminated string; newline inserted"));
4660 bump_line_counters ();
4665 #ifdef ONLY_STANDARD_ESCAPES
4666 as_bad (_("bad escaped character in string"));
4668 #endif /* ONLY_STANDARD_ESCAPES */
4673 #endif /* ! defined (NO_STRING_ESCAPES) */
4682 get_segmented_expression (register expressionS
*expP
)
4684 register segT retval
;
4686 retval
= expression (expP
);
4687 if (expP
->X_op
== O_illegal
4688 || expP
->X_op
== O_absent
4689 || expP
->X_op
== O_big
)
4691 as_bad (_("expected address expression"));
4692 expP
->X_op
= O_constant
;
4693 expP
->X_add_number
= 0;
4694 retval
= absolute_section
;
4700 get_known_segmented_expression (register expressionS
*expP
)
4702 register segT retval
;
4704 if ((retval
= get_segmented_expression (expP
)) == undefined_section
)
4706 /* There is no easy way to extract the undefined symbol from the
4708 if (expP
->X_add_symbol
!= NULL
4709 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
4710 as_warn (_("symbol \"%s\" undefined; zero assumed"),
4711 S_GET_NAME (expP
->X_add_symbol
));
4713 as_warn (_("some symbol undefined; zero assumed"));
4714 retval
= absolute_section
;
4715 expP
->X_op
= O_constant
;
4716 expP
->X_add_number
= 0;
4718 know (retval
== absolute_section
|| SEG_NORMAL (retval
));
4723 get_absolute_expr (expressionS
*exp
)
4726 if (exp
->X_op
!= O_constant
)
4728 if (exp
->X_op
!= O_absent
)
4729 as_bad (_("bad or irreducible absolute expression"));
4730 exp
->X_add_number
= 0;
4732 return exp
->X_add_number
;
4736 get_absolute_expression (void)
4740 return get_absolute_expr (&exp
);
4743 char /* Return terminator. */
4744 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
4746 /* FIXME: val_pointer should probably be offsetT *. */
4747 *val_pointer
= (long) get_absolute_expression ();
4748 return (*input_line_pointer
++);
4751 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
4752 Give a warning if that happens. */
4755 demand_copy_C_string (int *len_pointer
)
4759 if ((s
= demand_copy_string (len_pointer
)) != 0)
4763 for (len
= *len_pointer
; len
> 0; len
--)
4770 as_bad (_("this string may not contain \'\\0\'"));
4778 /* Demand string, but return a safe (=private) copy of the string.
4779 Return NULL if we can't read a string here. */
4782 demand_copy_string (int *lenP
)
4784 register unsigned int c
;
4790 if (*input_line_pointer
== '\"')
4792 input_line_pointer
++; /* Skip opening quote. */
4794 while (is_a_char (c
= next_char_of_string ()))
4796 obstack_1grow (¬es
, c
);
4799 /* JF this next line is so demand_copy_C_string will return a
4800 null terminated string. */
4801 obstack_1grow (¬es
, '\0');
4802 retval
= obstack_finish (¬es
);
4806 as_bad (_("missing string"));
4808 ignore_rest_of_line ();
4814 /* In: Input_line_pointer->next character.
4816 Do: Skip input_line_pointer over all whitespace.
4818 Out: 1 if input_line_pointer->end-of-line. */
4821 is_it_end_of_statement (void)
4824 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
4828 equals (char *sym_name
, int reassign
)
4830 register symbolS
*symbolP
; /* Symbol we are working with. */
4834 input_line_pointer
++;
4835 if (*input_line_pointer
== '=')
4836 input_line_pointer
++;
4838 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
4839 input_line_pointer
++;
4842 stop
= mri_comment_field (&stopc
);
4844 if (sym_name
[0] == '.' && sym_name
[1] == '\0')
4846 /* Turn '. = mumble' into a .org mumble. */
4847 register segT segment
;
4850 segment
= get_known_segmented_expression (&exp
);
4852 do_org (segment
, &exp
, 0);
4859 symbolP
= symbol_find (sym_name
);
4860 local
= symbolP
== NULL
;
4862 #endif /* OBJ_COFF */
4863 symbolP
= symbol_find_or_make (sym_name
);
4864 /* Permit register names to be redefined. */
4866 && S_IS_DEFINED (symbolP
)
4867 && S_GET_SEGMENT (symbolP
) != reg_section
)
4868 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (symbolP
));
4871 /* "set" symbols are local unless otherwise specified. */
4873 SF_SET_LOCAL (symbolP
);
4874 #endif /* OBJ_COFF */
4876 pseudo_set (symbolP
);
4881 /* Check garbage after the expression. */
4882 demand_empty_rest_of_line ();
4883 mri_comment_end (stop
, stopc
);
4887 /* .incbin -- include a file verbatim at the current location. */
4890 s_incbin (int x ATTRIBUTE_UNUSED
)
4901 #ifdef md_flush_pending_output
4902 md_flush_pending_output ();
4906 filename
= demand_copy_string (& len
);
4907 if (filename
== NULL
)
4912 /* Look for optional skip and count. */
4913 if (* input_line_pointer
== ',')
4915 ++ input_line_pointer
;
4916 skip
= get_absolute_expression ();
4920 if (* input_line_pointer
== ',')
4922 ++ input_line_pointer
;
4924 count
= get_absolute_expression ();
4926 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
4932 demand_empty_rest_of_line ();
4934 /* Try opening absolute path first, then try include dirs. */
4935 binfile
= fopen (filename
, FOPEN_RB
);
4936 if (binfile
== NULL
)
4940 path
= xmalloc ((unsigned long) len
+ include_dir_maxlen
+ 5);
4942 for (i
= 0; i
< include_dir_count
; i
++)
4944 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
4946 binfile
= fopen (path
, FOPEN_RB
);
4947 if (binfile
!= NULL
)
4951 if (binfile
== NULL
)
4952 as_bad (_("file not found: %s"), filename
);
4955 path
= xstrdup (filename
);
4961 register_dependency (path
);
4963 /* Compute the length of the file. */
4964 if (fseek (binfile
, 0, SEEK_END
) != 0)
4966 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
4969 file_len
= ftell (binfile
);
4971 /* If a count was not specified use the size of the file. */
4975 if (skip
+ count
> file_len
)
4977 as_bad (_("skip (%ld) + count (%ld) larger than file size (%ld)"),
4978 skip
, count
, file_len
);
4982 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
4984 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
4988 /* Allocate frag space and store file contents in it. */
4989 binfrag
= frag_more (count
);
4991 bytes
= fread (binfrag
, 1, count
, binfile
);
4993 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
4994 path
, bytes
, count
);
4997 if (binfile
!= NULL
)
5003 /* .include -- include a file at this point. */
5006 s_include (int arg ATTRIBUTE_UNUSED
)
5015 filename
= demand_copy_string (&i
);
5016 if (filename
== NULL
)
5018 /* demand_copy_string has already printed an error and
5019 called ignore_rest_of_line. */
5027 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
5028 && *input_line_pointer
!= ' '
5029 && *input_line_pointer
!= '\t')
5031 obstack_1grow (¬es
, *input_line_pointer
);
5032 ++input_line_pointer
;
5036 obstack_1grow (¬es
, '\0');
5037 filename
= obstack_finish (¬es
);
5038 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5039 ++input_line_pointer
;
5042 demand_empty_rest_of_line ();
5043 path
= xmalloc ((unsigned long) i
+ include_dir_maxlen
+ 5 /* slop */ );
5045 for (i
= 0; i
< include_dir_count
; i
++)
5047 strcpy (path
, include_dirs
[i
]);
5049 strcat (path
, filename
);
5050 if (0 != (try = fopen (path
, FOPEN_RT
)))
5060 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5061 register_dependency (path
);
5062 input_scrub_insert_file (path
);
5066 add_include_dir (char *path
)
5070 if (include_dir_count
== 0)
5072 include_dirs
= (char **) xmalloc (2 * sizeof (*include_dirs
));
5073 include_dirs
[0] = "."; /* Current dir. */
5074 include_dir_count
= 2;
5078 include_dir_count
++;
5080 (char **) realloc (include_dirs
,
5081 include_dir_count
* sizeof (*include_dirs
));
5084 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
5087 if (i
> include_dir_maxlen
)
5088 include_dir_maxlen
= i
;
5091 /* Output debugging information to denote the source file. */
5094 generate_file_debug (void)
5096 if (debug_type
== DEBUG_STABS
)
5097 stabs_generate_asm_file ();
5100 /* Output line number debugging information for the current source line. */
5103 generate_lineno_debug (void)
5107 case DEBUG_UNSPECIFIED
:
5112 stabs_generate_asm_lineno ();
5115 ecoff_generate_asm_lineno ();
5118 /* ??? We could here indicate to dwarf2dbg.c that something
5119 has changed. However, since there is additional backend
5120 support that is required (calling dwarf2_emit_insn), we
5121 let dwarf2dbg.c call as_where on its own. */
5126 /* Output debugging information to mark a function entry point or end point.
5127 END_P is zero for .func, and non-zero for .endfunc. */
5132 do_s_func (end_p
, NULL
);
5135 /* Subroutine of s_func so targets can choose a different default prefix.
5136 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5139 do_s_func (int end_p
, const char *default_prefix
)
5141 /* Record the current function so that we can issue an error message for
5142 misplaced .func,.endfunc, and also so that .endfunc needs no
5144 static char *current_name
;
5145 static char *current_label
;
5149 if (current_name
== NULL
)
5151 as_bad (_("missing .func"));
5152 ignore_rest_of_line ();
5156 if (debug_type
== DEBUG_STABS
)
5157 stabs_generate_asm_endfunc (current_name
, current_label
);
5159 current_name
= current_label
= NULL
;
5164 char delim1
, delim2
;
5166 if (current_name
!= NULL
)
5168 as_bad (_(".endfunc missing for previous .func"));
5169 ignore_rest_of_line ();
5173 name
= input_line_pointer
;
5174 delim1
= get_symbol_end ();
5175 name
= xstrdup (name
);
5176 *input_line_pointer
= delim1
;
5178 if (*input_line_pointer
!= ',')
5181 asprintf (&label
, "%s%s", default_prefix
, name
);
5184 char leading_char
= 0;
5185 #ifdef BFD_ASSEMBLER
5186 leading_char
= bfd_get_symbol_leading_char (stdoutput
);
5188 /* Missing entry point, use function's name with the leading
5191 asprintf (&label
, "%c%s", leading_char
, name
);
5198 ++input_line_pointer
;
5200 label
= input_line_pointer
;
5201 delim2
= get_symbol_end ();
5202 label
= xstrdup (label
);
5203 *input_line_pointer
= delim2
;
5206 if (debug_type
== DEBUG_STABS
)
5207 stabs_generate_asm_func (name
, label
);
5209 current_name
= name
;
5210 current_label
= label
;
5213 demand_empty_rest_of_line ();
5217 s_ignore (int arg ATTRIBUTE_UNUSED
)
5219 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5221 ++input_line_pointer
;
5223 ++input_line_pointer
;
5227 read_print_statistics (FILE *file
)
5229 hash_print_statistics (file
, "pseudo-op table", po_hash
);
5232 /* Inserts the given line into the input stream.
5234 This call avoids macro/conditionals nesting checking, since the contents of
5235 the line are assumed to replace the contents of a line already scanned.
5237 An appropriate use of this function would be substitution of input lines when
5238 called by md_start_line_hook(). The given line is assumed to already be
5239 properly scrubbed. */
5242 input_scrub_insert_line (const char *line
)
5246 sb_add_string (&newline
, line
);
5247 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
5249 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5252 /* Insert a file into the input stream; the path must resolve to an actual
5253 file; no include path searching or dependency registering is performed. */
5256 input_scrub_insert_file (char *path
)
5258 input_scrub_include_file (path
, input_line_pointer
);
5259 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);