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
)
1207 unsigned int align_limit
= ALIGN_LIMIT
;
1216 stop
= mri_comment_field (&stopc
);
1218 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1223 align
= arg
; /* Default value from pseudo-op table. */
1227 align
= get_absolute_expression ();
1233 /* Convert to a power of 2. */
1238 for (i
= 0; (align
& 1) == 0; align
>>= 1, ++i
)
1241 as_bad (_("alignment not a power of 2"));
1247 if (align
> align_limit
)
1249 align
= align_limit
;
1250 as_warn (_("alignment too large: %u assumed"), align
);
1253 if (*input_line_pointer
!= ',')
1260 ++input_line_pointer
;
1261 if (*input_line_pointer
== ',')
1265 fill
= get_absolute_expression ();
1270 if (*input_line_pointer
!= ',')
1274 ++input_line_pointer
;
1275 max
= get_absolute_expression ();
1282 as_warn (_("expected fill pattern missing"));
1283 do_align (align
, (char *) NULL
, 0, max
);
1298 do_align (align
, &fill_char
, fill_len
, max
);
1304 if ((size_t) fill_len
> sizeof ab
)
1306 md_number_to_chars (ab
, fill
, fill_len
);
1307 do_align (align
, ab
, fill_len
, max
);
1311 demand_empty_rest_of_line ();
1314 mri_comment_end (stop
, stopc
);
1317 /* Handle the .align pseudo-op on machines where ".align 4" means
1318 align to a 4 byte boundary. */
1321 s_align_bytes (int arg
)
1326 /* Handle the .align pseudo-op on machines where ".align 4" means align
1327 to a 2**4 boundary. */
1330 s_align_ptwo (int arg
)
1335 /* Switch in and out of alternate macro mode. */
1340 demand_empty_rest_of_line ();
1341 macro_set_alternate (on
);
1345 s_comm_internal (int param
,
1346 symbolS
*(*comm_parse_extra
) (int, symbolS
*, addressT
))
1352 symbolS
*symbolP
= NULL
;
1358 stop
= mri_comment_field (&stopc
);
1360 name
= input_line_pointer
;
1361 c
= get_symbol_end ();
1362 /* Just after name is now '\0'. */
1363 p
= input_line_pointer
;
1368 as_bad (_("expected symbol name"));
1369 discard_rest_of_line ();
1375 /* Accept an optional comma after the name. The comma used to be
1376 required, but Irix 5 cc does not generate it for .lcomm. */
1377 if (*input_line_pointer
== ',')
1378 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"));
1388 ignore_rest_of_line ();
1391 else if (temp
!= size
|| !exp
.X_unsigned
)
1393 as_warn (_("size (%ld) out of range, ignored"), (long) temp
);
1394 ignore_rest_of_line ();
1399 symbolP
= symbol_find_or_make (name
);
1400 if (S_IS_DEFINED (symbolP
) && !S_IS_COMMON (symbolP
))
1403 as_bad (_("symbol `%s' is already defined"), name
);
1405 ignore_rest_of_line ();
1409 size
= S_GET_VALUE (symbolP
);
1412 else if (size
!= temp
)
1413 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1414 name
, (long) size
, (long) temp
);
1417 if (comm_parse_extra
!= NULL
)
1418 symbolP
= (*comm_parse_extra
) (param
, symbolP
, size
);
1421 S_SET_VALUE (symbolP
, (valueT
) size
);
1422 S_SET_EXTERNAL (symbolP
);
1425 extern int flag_one
;
1426 if (size
== 0 || !flag_one
)
1427 S_GET_OTHER (symbolP
) = const_flag
;
1432 know (symbolP
== NULL
|| symbolP
->sy_frag
== &zero_address_frag
);
1433 demand_empty_rest_of_line ();
1436 mri_comment_end (stop
, stopc
);
1443 s_comm_internal (ignore
, NULL
);
1446 /* The MRI COMMON pseudo-op. We handle this by creating a common
1447 symbol with the appropriate name. We make s_space do the right
1448 thing by increasing the size. */
1451 s_mri_common (int small ATTRIBUTE_UNUSED
)
1467 stop
= mri_comment_field (&stopc
);
1471 name
= input_line_pointer
;
1472 if (!ISDIGIT (*name
))
1473 c
= get_symbol_end ();
1478 ++input_line_pointer
;
1480 while (ISDIGIT (*input_line_pointer
));
1482 c
= *input_line_pointer
;
1483 *input_line_pointer
= '\0';
1485 if (line_label
!= NULL
)
1487 alc
= (char *) xmalloc (strlen (S_GET_NAME (line_label
))
1488 + (input_line_pointer
- name
)
1490 sprintf (alc
, "%s%s", name
, S_GET_NAME (line_label
));
1495 sym
= symbol_find_or_make (name
);
1496 *input_line_pointer
= c
;
1500 if (*input_line_pointer
!= ',')
1504 ++input_line_pointer
;
1505 align
= get_absolute_expression ();
1508 if (S_IS_DEFINED (sym
) && !S_IS_COMMON (sym
))
1510 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym
));
1511 ignore_rest_of_line ();
1512 mri_comment_end (stop
, stopc
);
1516 S_SET_EXTERNAL (sym
);
1517 mri_common_symbol
= sym
;
1521 S_SET_ALIGN (sym
, align
);
1524 if (line_label
!= NULL
)
1527 exp
.X_op
= O_symbol
;
1528 exp
.X_add_symbol
= sym
;
1529 exp
.X_add_number
= 0;
1530 symbol_set_value_expression (line_label
, &exp
);
1531 symbol_set_frag (line_label
, &zero_address_frag
);
1532 S_SET_SEGMENT (line_label
, expr_section
);
1535 /* FIXME: We just ignore the small argument, which distinguishes
1536 COMMON and COMMON.S. I don't know what we can do about it. */
1538 /* Ignore the type and hptype. */
1539 if (*input_line_pointer
== ',')
1540 input_line_pointer
+= 2;
1541 if (*input_line_pointer
== ',')
1542 input_line_pointer
+= 2;
1544 demand_empty_rest_of_line ();
1546 mri_comment_end (stop
, stopc
);
1550 s_data (int ignore ATTRIBUTE_UNUSED
)
1555 temp
= get_absolute_expression ();
1556 if (flag_readonly_data_in_text
)
1558 section
= text_section
;
1562 section
= data_section
;
1564 subseg_set (section
, (subsegT
) temp
);
1569 demand_empty_rest_of_line ();
1572 /* Handle the .appfile pseudo-op. This is automatically generated by
1573 do_scrub_chars when a preprocessor # line comment is seen with a
1574 file name. This default definition may be overridden by the object
1575 or CPU specific pseudo-ops. This function is also the default
1576 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1580 s_app_file_string (char *file
, int appfile
)
1584 listing_source_file (file
);
1586 register_dependency (file
);
1588 obj_app_file (file
, appfile
);
1593 s_app_file (int appfile
)
1598 /* Some assemblers tolerate immediately following '"'. */
1599 if ((s
= demand_copy_string (&length
)) != 0)
1601 /* If this is a fake .appfile, a fake newline was inserted into
1602 the buffer. Passing -2 to new_logical_line tells it to
1605 = (!new_logical_line (s
, appfile
? -2 : -1) && appfile
);
1607 /* In MRI mode, the preprocessor may have inserted an extraneous
1610 && *input_line_pointer
== '\''
1611 && is_end_of_line
[(unsigned char) input_line_pointer
[1]])
1612 ++input_line_pointer
;
1614 demand_empty_rest_of_line ();
1616 s_app_file_string (s
, appfile
);
1620 /* Handle the .appline pseudo-op. This is automatically generated by
1621 do_scrub_chars when a preprocessor # line comment is seen. This
1622 default definition may be overridden by the object or CPU specific
1626 s_app_line (int ignore ATTRIBUTE_UNUSED
)
1630 /* The given number is that of the next line. */
1631 l
= get_absolute_expression () - 1;
1633 /* Some of the back ends can't deal with non-positive line numbers.
1634 Besides, it's silly. */
1635 as_warn (_("line numbers must be positive; line number %d rejected"),
1639 new_logical_line ((char *) NULL
, l
);
1642 listing_source_line (l
);
1645 demand_empty_rest_of_line ();
1648 /* Handle the .end pseudo-op. Actually, the real work is done in
1649 read_a_source_file. */
1652 s_end (int ignore ATTRIBUTE_UNUSED
)
1656 /* The MRI assembler permits the start symbol to follow .end,
1657 but we don't support that. */
1659 if (!is_end_of_line
[(unsigned char) *input_line_pointer
]
1660 && *input_line_pointer
!= '*'
1661 && *input_line_pointer
!= '!')
1662 as_warn (_("start address not supported"));
1666 /* Handle the .err pseudo-op. */
1669 s_err (int ignore ATTRIBUTE_UNUSED
)
1671 as_bad (_(".err encountered"));
1672 demand_empty_rest_of_line ();
1675 /* Handle the .error and .warning pseudo-ops. */
1681 /* The purpose for the conditional assignment is not to
1682 internationalize the directive itself, but that we need a
1683 self-contained message, one that can be passed like the
1684 demand_copy_C_string return value, and with no assumption on the
1685 location of the name of the directive within the message. */
1687 = (err
? _(".error directive invoked in source file")
1688 : _(".warning directive invoked in source file"));
1690 if (!is_it_end_of_statement ())
1692 if (*input_line_pointer
!= '\"')
1694 as_bad (_("%s argument must be a string"),
1695 err
? ".error" : ".warning");
1696 discard_rest_of_line ();
1700 msg
= demand_copy_C_string (&len
);
1708 as_warn ("%s", msg
);
1709 demand_empty_rest_of_line ();
1712 /* Handle the MRI fail pseudo-op. */
1715 s_fail (int ignore ATTRIBUTE_UNUSED
)
1722 stop
= mri_comment_field (&stopc
);
1724 temp
= get_absolute_expression ();
1726 as_warn (_(".fail %ld encountered"), (long) temp
);
1728 as_bad (_(".fail %ld encountered"), (long) temp
);
1730 demand_empty_rest_of_line ();
1733 mri_comment_end (stop
, stopc
);
1737 s_fill (int ignore ATTRIBUTE_UNUSED
)
1739 expressionS rep_exp
;
1741 register long fill
= 0;
1744 #ifdef md_flush_pending_output
1745 md_flush_pending_output ();
1748 get_known_segmented_expression (&rep_exp
);
1749 if (*input_line_pointer
== ',')
1751 input_line_pointer
++;
1752 size
= get_absolute_expression ();
1753 if (*input_line_pointer
== ',')
1755 input_line_pointer
++;
1756 fill
= get_absolute_expression ();
1760 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1761 #define BSD_FILL_SIZE_CROCK_8 (8)
1762 if (size
> BSD_FILL_SIZE_CROCK_8
)
1764 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8
);
1765 size
= BSD_FILL_SIZE_CROCK_8
;
1769 as_warn (_("size negative; .fill ignored"));
1772 else if (rep_exp
.X_op
== O_constant
&& rep_exp
.X_add_number
<= 0)
1774 if (rep_exp
.X_add_number
< 0)
1775 as_warn (_("repeat < 0; .fill ignored"));
1779 if (size
&& !need_pass_2
)
1781 if (rep_exp
.X_op
== O_constant
)
1783 p
= frag_var (rs_fill
, (int) size
, (int) size
,
1784 (relax_substateT
) 0, (symbolS
*) 0,
1785 (offsetT
) rep_exp
.X_add_number
,
1790 /* We don't have a constant repeat count, so we can't use
1791 rs_fill. We can get the same results out of rs_space,
1792 but its argument is in bytes, so we must multiply the
1793 repeat count by size. */
1796 rep_sym
= make_expr_symbol (&rep_exp
);
1799 expressionS size_exp
;
1800 size_exp
.X_op
= O_constant
;
1801 size_exp
.X_add_number
= size
;
1803 rep_exp
.X_op
= O_multiply
;
1804 rep_exp
.X_add_symbol
= rep_sym
;
1805 rep_exp
.X_op_symbol
= make_expr_symbol (&size_exp
);
1806 rep_exp
.X_add_number
= 0;
1807 rep_sym
= make_expr_symbol (&rep_exp
);
1810 p
= frag_var (rs_space
, (int) size
, (int) size
,
1811 (relax_substateT
) 0, rep_sym
, (offsetT
) 0, (char *) 0);
1814 memset (p
, 0, (unsigned int) size
);
1816 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1817 flavoured AS. The following bizarre behaviour is to be
1818 compatible with above. I guess they tried to take up to 8
1819 bytes from a 4-byte expression and they forgot to sign
1821 #define BSD_FILL_SIZE_CROCK_4 (4)
1822 md_number_to_chars (p
, (valueT
) fill
,
1823 (size
> BSD_FILL_SIZE_CROCK_4
1824 ? BSD_FILL_SIZE_CROCK_4
1826 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1827 but emits no error message because it seems a legal thing to do.
1828 It is a degenerate case of .fill but could be emitted by a
1831 demand_empty_rest_of_line ();
1835 s_globl (int ignore ATTRIBUTE_UNUSED
)
1844 stop
= mri_comment_field (&stopc
);
1848 name
= input_line_pointer
;
1849 c
= get_symbol_end ();
1850 symbolP
= symbol_find_or_make (name
);
1851 S_SET_EXTERNAL (symbolP
);
1853 *input_line_pointer
= c
;
1855 c
= *input_line_pointer
;
1858 input_line_pointer
++;
1860 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1866 demand_empty_rest_of_line ();
1869 mri_comment_end (stop
, stopc
);
1872 /* Handle the MRI IRP and IRPC pseudo-ops. */
1883 as_where (&file
, &line
);
1886 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1887 sb_add_char (&s
, *input_line_pointer
++);
1891 err
= expand_irp (irpc
, 0, &s
, &out
, get_line_sb
);
1893 as_bad_where (file
, line
, "%s", err
);
1897 input_scrub_include_sb (&out
, input_line_pointer
, 1);
1899 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1902 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
1903 the section to only be linked once. However, this is not supported
1904 by most object file formats. This takes an optional argument,
1905 which is what to do about duplicates. */
1908 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
1910 enum linkonce_type type
;
1914 type
= LINKONCE_DISCARD
;
1916 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1921 s
= input_line_pointer
;
1922 c
= get_symbol_end ();
1923 if (strcasecmp (s
, "discard") == 0)
1924 type
= LINKONCE_DISCARD
;
1925 else if (strcasecmp (s
, "one_only") == 0)
1926 type
= LINKONCE_ONE_ONLY
;
1927 else if (strcasecmp (s
, "same_size") == 0)
1928 type
= LINKONCE_SAME_SIZE
;
1929 else if (strcasecmp (s
, "same_contents") == 0)
1930 type
= LINKONCE_SAME_CONTENTS
;
1932 as_warn (_("unrecognized .linkonce type `%s'"), s
);
1934 *input_line_pointer
= c
;
1937 #ifdef obj_handle_link_once
1938 obj_handle_link_once (type
);
1939 #else /* ! defined (obj_handle_link_once) */
1940 #ifdef BFD_ASSEMBLER
1944 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
1945 as_warn (_(".linkonce is not supported for this object file format"));
1947 flags
= bfd_get_section_flags (stdoutput
, now_seg
);
1948 flags
|= SEC_LINK_ONCE
;
1953 case LINKONCE_DISCARD
:
1954 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
1956 case LINKONCE_ONE_ONLY
:
1957 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
1959 case LINKONCE_SAME_SIZE
:
1960 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
1962 case LINKONCE_SAME_CONTENTS
:
1963 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
1966 if (!bfd_set_section_flags (stdoutput
, now_seg
, flags
))
1967 as_bad (_("bfd_set_section_flags: %s"),
1968 bfd_errmsg (bfd_get_error ()));
1970 #else /* ! defined (BFD_ASSEMBLER) */
1971 as_warn (_(".linkonce is not supported for this object file format"));
1972 #endif /* ! defined (BFD_ASSEMBLER) */
1973 #endif /* ! defined (obj_handle_link_once) */
1975 demand_empty_rest_of_line ();
1979 bss_alloc (symbolS
*symbolP
, addressT size
, int align
)
1982 segT current_seg
= now_seg
;
1983 subsegT current_subseg
= now_subseg
;
1984 segT bss_seg
= bss_section
;
1986 #if defined (TC_MIPS) || defined (TC_ALPHA)
1987 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
1988 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
1990 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
1991 if (size
<= bfd_get_gp_size (stdoutput
))
1993 bss_seg
= subseg_new (".sbss", 1);
1994 seg_info (bss_seg
)->bss
= 1;
1995 #ifdef BFD_ASSEMBLER
1996 if (!bfd_set_section_flags (stdoutput
, bss_seg
, SEC_ALLOC
))
1997 as_warn (_("error setting flags for \".sbss\": %s"),
1998 bfd_errmsg (bfd_get_error ()));
2003 subseg_set (bss_seg
, 1);
2007 record_alignment (bss_seg
, align
);
2008 frag_align (align
, 0, 0);
2011 /* Detach from old frag. */
2012 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2013 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2015 symbol_set_frag (symbolP
, frag_now
);
2016 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
, NULL
);
2020 S_SET_SIZE (symbolP
, size
);
2022 S_SET_SEGMENT (symbolP
, bss_seg
);
2025 /* The symbol may already have been created with a preceding
2026 ".globl" directive -- be careful not to step on storage class
2027 in that case. Otherwise, set it to static. */
2028 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2029 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2030 #endif /* OBJ_COFF */
2032 subseg_set (current_seg
, current_subseg
);
2036 parse_align (int align_bytes
)
2042 if (*input_line_pointer
!= ',')
2045 as_bad (_("expected alignment after size"));
2046 ignore_rest_of_line ();
2050 input_line_pointer
++;
2053 align
= get_absolute_expr (&exp
);
2054 if (exp
.X_op
== O_absent
)
2057 if (!exp
.X_unsigned
)
2059 as_warn (_("alignment negative; 0 assumed"));
2063 if (align_bytes
&& align
!= 0)
2065 /* convert to a power of 2 alignment */
2066 unsigned int alignp2
= 0;
2067 while ((align
& 1) == 0)
2068 align
>>= 1, ++alignp2
;
2071 as_bad (_("alignment not a power of 2"));
2072 ignore_rest_of_line ();
2080 /* Called from s_comm_internal after symbol name and size have been
2081 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2082 1 if this was a ".bss" directive which has a 3rd argument
2083 (alignment as a power of 2), or 2 if this was a ".bss" directive
2084 with alignment in bytes. */
2087 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2093 align
= parse_align (needs_align
- 1);
2094 if (align
== (addressT
) -1)
2098 /* Assume some objects may require alignment on some systems. */
2099 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2101 bss_alloc (symbolP
, size
, align
);
2106 s_lcomm (int needs_align
)
2108 s_comm_internal (needs_align
, s_lcomm_internal
);
2112 s_lcomm_bytes (int needs_align
)
2114 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2118 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2120 register char *name
;
2124 register symbolS
*symbolP
;
2126 /* We permit ANY defined expression: BSD4.2 demands constants. */
2127 name
= input_line_pointer
;
2128 c
= get_symbol_end ();
2129 p
= input_line_pointer
;
2134 as_bad (_("expected symbol name"));
2135 discard_rest_of_line ();
2141 if (*input_line_pointer
!= ',')
2144 as_bad (_("expected comma after \"%s\""), name
);
2146 ignore_rest_of_line ();
2150 input_line_pointer
++;
2153 if (exp
.X_op
!= O_constant
2154 && exp
.X_op
!= O_register
)
2156 as_bad (_("bad expression"));
2157 ignore_rest_of_line ();
2162 symbolP
= symbol_find_or_make (name
);
2164 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
2165 symbolP->sy_desc == 0) out of this test because coff doesn't have
2166 those fields, and I can't see when they'd ever be tripped. I
2167 don't think I understand why they were here so I may have
2168 introduced a bug. As recently as 1.37 didn't have this test
2169 anyway. xoxorich. */
2171 if (S_GET_SEGMENT (symbolP
) == undefined_section
2172 && S_GET_VALUE (symbolP
) == 0)
2174 /* The name might be an undefined .global symbol; be sure to
2175 keep the "external" bit. */
2176 S_SET_SEGMENT (symbolP
,
2177 (exp
.X_op
== O_constant
2180 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2184 as_bad (_("symbol `%s' is already defined"), name
);
2188 demand_empty_rest_of_line ();
2191 /* Read a line into an sb. Returns the character that ended the line
2192 or zero if there are no more lines. */
2195 get_line_sb (sb
*line
)
2197 char quote1
, quote2
, inquote
;
2200 if (input_line_pointer
[-1] == '\n')
2201 bump_line_counters ();
2203 if (input_line_pointer
>= buffer_limit
)
2205 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2206 if (buffer_limit
== 0)
2210 /* If app.c sets any other characters to LEX_IS_STRINGQUOTE, this
2211 code needs to be changed. */
2220 #ifdef LEX_IS_STRINGQUOTE
2226 while ((c
= * input_line_pointer
++) != 0
2227 && (!is_end_of_line
[c
]
2228 || (inquote
!= '\0' && c
!= '\n')))
2232 else if (inquote
== '\0')
2236 else if (c
== quote2
)
2240 sb_add_char (line
, c
);
2243 /* Don't skip multiple end-of-line characters, because that breaks support
2244 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2245 characters but isn't. Instead just skip one end of line character and
2246 return the character skipped so that the caller can re-insert it if
2251 /* Define a macro. This is an interface to macro.c. */
2254 s_macro (int ignore ATTRIBUTE_UNUSED
)
2263 as_where (&file
, &line
);
2266 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
2267 sb_add_char (&s
, *input_line_pointer
++);
2270 if (line_label
!= NULL
)
2271 sb_add_string (&label
, S_GET_NAME (line_label
));
2273 err
= define_macro (0, &s
, &label
, get_line_sb
, &name
);
2275 as_bad_where (file
, line
, "%s", err
);
2278 if (line_label
!= NULL
)
2280 S_SET_SEGMENT (line_label
, undefined_section
);
2281 S_SET_VALUE (line_label
, 0);
2282 symbol_set_frag (line_label
, &zero_address_frag
);
2285 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2286 && hash_find (po_hash
, name
) != NULL
)
2289 && hash_find (po_hash
, name
+ 1) != NULL
))
2290 as_warn (_("attempt to redefine pseudo-op `%s' ignored"),
2297 /* Handle the .mexit pseudo-op, which immediately exits a macro
2301 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2303 cond_exit_macro (macro_nest
);
2304 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2307 /* Switch in and out of MRI mode. */
2310 s_mri (int ignore ATTRIBUTE_UNUSED
)
2314 on
= get_absolute_expression ();
2315 old_flag
= flag_mri
;
2333 /* Operator precedence changes in m68k MRI mode, so we need to
2334 update the operator rankings. */
2335 expr_set_precedence ();
2337 #ifdef MRI_MODE_CHANGE
2339 MRI_MODE_CHANGE (on
);
2342 demand_empty_rest_of_line ();
2345 /* Handle changing the location counter. */
2348 do_org (segT segment
, expressionS
*exp
, int fill
)
2350 if (segment
!= now_seg
&& segment
!= absolute_section
)
2351 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2353 if (now_seg
== absolute_section
)
2356 as_warn (_("ignoring fill value in absolute section"));
2357 if (exp
->X_op
!= O_constant
)
2359 as_bad (_("only constant offsets supported in absolute section"));
2360 exp
->X_add_number
= 0;
2362 abs_section_offset
= exp
->X_add_number
;
2367 symbolS
*sym
= exp
->X_add_symbol
;
2368 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2370 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2372 /* Handle complex expressions. */
2373 sym
= make_expr_symbol (exp
);
2377 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2383 s_org (int ignore ATTRIBUTE_UNUSED
)
2385 register segT segment
;
2387 register long temp_fill
;
2389 #ifdef md_flush_pending_output
2390 md_flush_pending_output ();
2393 /* The m68k MRI assembler has a different meaning for .org. It
2394 means to create an absolute section at a given address. We can't
2395 support that--use a linker script instead. */
2398 as_bad (_("MRI style ORG pseudo-op not supported"));
2399 ignore_rest_of_line ();
2403 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2404 thing as a sub-segment-relative origin. Any absolute origin is
2405 given a warning, then assumed to be segment-relative. Any
2406 segmented origin expression ("foo+42") had better be in the right
2407 segment or the .org is ignored.
2409 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2410 we never know sub-segment sizes when we are reading code. BSD
2411 will crash trying to emit negative numbers of filler bytes in
2412 certain .orgs. We don't crash, but see as-write for that code.
2414 Don't make frag if need_pass_2==1. */
2415 segment
= get_known_segmented_expression (&exp
);
2416 if (*input_line_pointer
== ',')
2418 input_line_pointer
++;
2419 temp_fill
= get_absolute_expression ();
2425 do_org (segment
, &exp
, temp_fill
);
2427 demand_empty_rest_of_line ();
2430 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2431 called by the obj-format routine which handles section changing
2432 when in MRI mode. It will create a new section, and return it. It
2433 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2434 'M' (mixed), or 'R' (romable). If BFD_ASSEMBLER is defined, the
2435 flags will be set in the section. */
2438 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2448 name
= input_line_pointer
;
2449 if (!ISDIGIT (*name
))
2450 c
= get_symbol_end ();
2455 ++input_line_pointer
;
2457 while (ISDIGIT (*input_line_pointer
));
2459 c
= *input_line_pointer
;
2460 *input_line_pointer
= '\0';
2463 name
= xstrdup (name
);
2465 *input_line_pointer
= c
;
2467 seg
= subseg_new (name
, 0);
2469 if (*input_line_pointer
== ',')
2473 ++input_line_pointer
;
2474 align
= get_absolute_expression ();
2475 record_alignment (seg
, align
);
2479 if (*input_line_pointer
== ',')
2481 c
= *++input_line_pointer
;
2483 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
2486 as_bad (_("unrecognized section type"));
2487 ++input_line_pointer
;
2489 #ifdef BFD_ASSEMBLER
2493 flags
= SEC_NO_FLAGS
;
2495 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
2496 else if (*type
== 'D' || *type
== 'M')
2497 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
2498 else if (*type
== 'R')
2499 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
2500 if (flags
!= SEC_NO_FLAGS
)
2502 if (!bfd_set_section_flags (stdoutput
, seg
, flags
))
2503 as_warn (_("error setting flags for \"%s\": %s"),
2504 bfd_section_name (stdoutput
, seg
),
2505 bfd_errmsg (bfd_get_error ()));
2511 /* Ignore the HP type. */
2512 if (*input_line_pointer
== ',')
2513 input_line_pointer
+= 2;
2515 demand_empty_rest_of_line ();
2517 #else /* ! TC_M68K */
2526 name
= input_line_pointer
;
2527 c
= get_symbol_end ();
2529 name
= xstrdup (name
);
2531 *input_line_pointer
= c
;
2533 seg
= subseg_new (name
, 0);
2535 if (*input_line_pointer
!= ',')
2541 ++input_line_pointer
;
2543 sectype
= input_line_pointer
;
2544 c
= get_symbol_end ();
2545 if (*sectype
== '\0')
2547 else if (strcasecmp (sectype
, "text") == 0)
2549 else if (strcasecmp (sectype
, "data") == 0)
2551 else if (strcasecmp (sectype
, "romdata") == 0)
2554 as_warn (_("unrecognized section type `%s'"), sectype
);
2555 *input_line_pointer
= c
;
2558 if (*input_line_pointer
== ',')
2562 ++input_line_pointer
;
2564 seccmd
= input_line_pointer
;
2565 c
= get_symbol_end ();
2566 if (strcasecmp (seccmd
, "absolute") == 0)
2568 as_bad (_("absolute sections are not supported"));
2569 *input_line_pointer
= c
;
2570 ignore_rest_of_line ();
2573 else if (strcasecmp (seccmd
, "align") == 0)
2577 *input_line_pointer
= c
;
2578 align
= get_absolute_expression ();
2579 record_alignment (seg
, align
);
2583 as_warn (_("unrecognized section command `%s'"), seccmd
);
2584 *input_line_pointer
= c
;
2588 demand_empty_rest_of_line ();
2590 #else /* ! TC_I960 */
2591 /* The MRI assembler seems to use different forms of .sect for
2592 different targets. */
2593 as_bad ("MRI mode not supported for this target");
2594 ignore_rest_of_line ();
2595 #endif /* ! TC_I960 */
2596 #endif /* ! TC_M68K */
2599 /* Handle the .print pseudo-op. */
2602 s_print (int ignore ATTRIBUTE_UNUSED
)
2607 s
= demand_copy_C_string (&len
);
2610 demand_empty_rest_of_line ();
2613 /* Handle the .purgem pseudo-op. */
2616 s_purgem (int ignore ATTRIBUTE_UNUSED
)
2618 if (is_it_end_of_statement ())
2620 demand_empty_rest_of_line ();
2630 name
= input_line_pointer
;
2631 c
= get_symbol_end ();
2632 delete_macro (name
);
2633 *input_line_pointer
= c
;
2636 while (*input_line_pointer
++ == ',');
2638 --input_line_pointer
;
2639 demand_empty_rest_of_line ();
2642 /* Handle the .rept pseudo-op. */
2645 s_bad_endr (int ignore ATTRIBUTE_UNUSED
)
2647 as_warn (_(".endr encountered without preceeding .rept, .irc, or .irp"));
2648 demand_empty_rest_of_line ();
2651 /* Handle the .rept pseudo-op. */
2654 s_rept (int ignore ATTRIBUTE_UNUSED
)
2658 count
= get_absolute_expression ();
2660 do_repeat (count
, "REPT", "ENDR");
2663 /* This function provides a generic repeat block implementation. It allows
2664 different directives to be used as the start/end keys. */
2667 do_repeat (int count
, const char *start
, const char *end
)
2673 if (!buffer_and_nest (start
, end
, &one
, get_line_sb
))
2675 as_bad (_("%s without %s"), start
, end
);
2681 sb_add_sb (&many
, &one
);
2685 input_scrub_include_sb (&many
, input_line_pointer
, 1);
2687 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2690 /* Skip to end of current repeat loop; EXTRA indicates how many additional
2691 input buffers to skip. Assumes that conditionals preceding the loop end
2692 are properly nested.
2694 This function makes it easier to implement a premature "break" out of the
2695 loop. The EXTRA arg accounts for other buffers we might have inserted,
2696 such as line substitutions. */
2699 end_repeat (int extra
)
2701 cond_exit_macro (macro_nest
);
2702 while (extra
-- >= 0)
2703 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2706 /* Handle the .equ, .equiv and .set directives. If EQUIV is 1, then
2707 this is .equiv, and it is an error if the symbol is already
2713 register char *name
;
2714 register char delim
;
2715 register char *end_name
;
2716 register symbolS
*symbolP
;
2718 /* Especial apologies for the random logic:
2719 this just grew, and could be parsed much more simply!
2721 name
= input_line_pointer
;
2722 delim
= get_symbol_end ();
2723 end_name
= input_line_pointer
;
2726 if (name
== end_name
)
2728 as_bad (_("expected symbol name"));
2729 discard_rest_of_line ();
2735 if (*input_line_pointer
!= ',')
2738 as_bad (_("expected comma after \"%s\""), name
);
2740 ignore_rest_of_line ();
2744 input_line_pointer
++;
2747 if (name
[0] == '.' && name
[1] == '\0')
2749 /* Turn '. = mumble' into a .org mumble. */
2750 register segT segment
;
2753 segment
= get_known_segmented_expression (&exp
);
2756 do_org (segment
, &exp
, 0);
2762 if ((symbolP
= symbol_find (name
)) == NULL
2763 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
2766 /* When doing symbol listings, play games with dummy fragments living
2767 outside the normal fragment chain to record the file and line info
2769 if (listing
& LISTING_SYMBOLS
)
2771 extern struct list_info_struct
*listing_tail
;
2772 fragS
*dummy_frag
= (fragS
*) xmalloc (sizeof (fragS
));
2773 memset (dummy_frag
, 0, sizeof (fragS
));
2774 dummy_frag
->fr_type
= rs_fill
;
2775 dummy_frag
->line
= listing_tail
;
2776 symbolP
= symbol_new (name
, undefined_section
, 0, dummy_frag
);
2777 dummy_frag
->fr_symbol
= symbolP
;
2781 symbolP
= symbol_new (name
, undefined_section
, 0, &zero_address_frag
);
2784 /* "set" symbols are local unless otherwise specified. */
2785 SF_SET_LOCAL (symbolP
);
2786 #endif /* OBJ_COFF */
2789 symbol_table_insert (symbolP
);
2794 && S_IS_DEFINED (symbolP
)
2795 && S_GET_SEGMENT (symbolP
) != reg_section
)
2796 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (symbolP
));
2798 pseudo_set (symbolP
);
2799 demand_empty_rest_of_line ();
2812 #ifdef md_flush_pending_output
2813 md_flush_pending_output ();
2817 stop
= mri_comment_field (&stopc
);
2819 /* In m68k MRI mode, we need to align to a word boundary, unless
2821 if (flag_m68k_mri
&& mult
> 1)
2823 if (now_seg
== absolute_section
)
2825 abs_section_offset
+= abs_section_offset
& 1;
2826 if (line_label
!= NULL
)
2827 S_SET_VALUE (line_label
, abs_section_offset
);
2829 else if (mri_common_symbol
!= NULL
)
2833 val
= S_GET_VALUE (mri_common_symbol
);
2836 S_SET_VALUE (mri_common_symbol
, val
+ 1);
2837 if (line_label
!= NULL
)
2839 expressionS
*symexp
;
2841 symexp
= symbol_get_value_expression (line_label
);
2842 know (symexp
->X_op
== O_symbol
);
2843 know (symexp
->X_add_symbol
== mri_common_symbol
);
2844 symexp
->X_add_number
+= 1;
2850 do_align (1, (char *) NULL
, 0, 0);
2851 if (line_label
!= NULL
)
2853 symbol_set_frag (line_label
, frag_now
);
2854 S_SET_VALUE (line_label
, frag_now_fix ());
2864 if (*input_line_pointer
== ',')
2866 ++input_line_pointer
;
2871 val
.X_op
= O_constant
;
2872 val
.X_add_number
= 0;
2875 if (val
.X_op
!= O_constant
2876 || val
.X_add_number
< - 0x80
2877 || val
.X_add_number
> 0xff
2878 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
2880 if (exp
.X_op
!= O_constant
)
2881 as_bad (_("unsupported variable size or fill value"));
2888 bytes
= mult
* exp
.X_add_number
;
2889 for (i
= 0; i
< exp
.X_add_number
; i
++)
2890 emit_expr (&val
, mult
);
2895 if (exp
.X_op
== O_constant
)
2899 repeat
= exp
.X_add_number
;
2906 as_warn (_(".space repeat count is zero, ignored"));
2907 else if (repeat
< 0)
2908 as_warn (_(".space repeat count is negative, ignored"));
2912 /* If we are in the absolute section, just bump the offset. */
2913 if (now_seg
== absolute_section
)
2915 abs_section_offset
+= repeat
;
2919 /* If we are secretly in an MRI common section, then
2920 creating space just increases the size of the common
2922 if (mri_common_symbol
!= NULL
)
2924 S_SET_VALUE (mri_common_symbol
,
2925 S_GET_VALUE (mri_common_symbol
) + repeat
);
2930 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
2931 (offsetT
) repeat
, (char *) 0);
2935 if (now_seg
== absolute_section
)
2937 as_bad (_("space allocation too complex in absolute section"));
2938 subseg_set (text_section
, 0);
2941 if (mri_common_symbol
!= NULL
)
2943 as_bad (_("space allocation too complex in common section"));
2944 mri_common_symbol
= NULL
;
2948 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
2949 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
2953 *p
= val
.X_add_number
;
2958 /* In MRI mode, after an odd number of bytes, we must align to an
2959 even word boundary, unless the next instruction is a dc.b, ds.b
2961 if (flag_mri
&& (bytes
& 1) != 0)
2962 mri_pending_align
= 1;
2964 demand_empty_rest_of_line ();
2967 mri_comment_end (stop
, stopc
);
2970 /* This is like s_space, but the value is a floating point number with
2971 the given precision. This is for the MRI dcb.s pseudo-op and
2975 s_float_space (int float_type
)
2979 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
2984 stop
= mri_comment_field (&stopc
);
2986 count
= get_absolute_expression ();
2989 if (*input_line_pointer
!= ',')
2991 as_bad (_("missing value"));
2992 ignore_rest_of_line ();
2994 mri_comment_end (stop
, stopc
);
2998 ++input_line_pointer
;
3002 /* Skip any 0{letter} that may be present. Don't even check if the
3003 * letter is legal. */
3004 if (input_line_pointer
[0] == '0'
3005 && ISALPHA (input_line_pointer
[1]))
3006 input_line_pointer
+= 2;
3008 /* Accept :xxxx, where the x's are hex digits, for a floating point
3009 with the exact digits specified. */
3010 if (input_line_pointer
[0] == ':')
3012 flen
= hex_float (float_type
, temp
);
3015 ignore_rest_of_line ();
3017 mri_comment_end (stop
, stopc
);
3025 err
= md_atof (float_type
, temp
, &flen
);
3026 know (flen
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3030 as_bad (_("bad floating literal: %s"), err
);
3031 ignore_rest_of_line ();
3033 mri_comment_end (stop
, stopc
);
3038 while (--count
>= 0)
3042 p
= frag_more (flen
);
3043 memcpy (p
, temp
, (unsigned int) flen
);
3046 demand_empty_rest_of_line ();
3049 mri_comment_end (stop
, stopc
);
3052 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3055 s_struct (int ignore ATTRIBUTE_UNUSED
)
3061 stop
= mri_comment_field (&stopc
);
3062 abs_section_offset
= get_absolute_expression ();
3063 subseg_set (absolute_section
, 0);
3064 demand_empty_rest_of_line ();
3066 mri_comment_end (stop
, stopc
);
3070 s_text (int ignore ATTRIBUTE_UNUSED
)
3074 temp
= get_absolute_expression ();
3075 subseg_set (text_section
, (subsegT
) temp
);
3076 demand_empty_rest_of_line ();
3078 const_flag
&= ~IN_DEFAULT_SECTION
;
3083 /* Verify that we are at the end of a line. If not, issue an error and
3087 demand_empty_rest_of_line (void)
3090 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3091 input_line_pointer
++;
3094 if (ISPRINT (*input_line_pointer
))
3095 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3096 *input_line_pointer
);
3098 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3099 *input_line_pointer
);
3100 ignore_rest_of_line ();
3103 /* Return pointing just after end-of-line. */
3104 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3107 /* Silently advance to the end of line. Use this after already having
3108 issued an error about something bad. */
3111 ignore_rest_of_line (void)
3113 while (input_line_pointer
< buffer_limit
3114 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3115 input_line_pointer
++;
3117 input_line_pointer
++;
3119 /* Return pointing just after end-of-line. */
3120 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3124 discard_rest_of_line (void)
3126 while (input_line_pointer
< buffer_limit
3127 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3128 input_line_pointer
++;
3130 input_line_pointer
++;
3132 /* Return pointing just after end-of-line. */
3133 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3136 /* In: Pointer to a symbol.
3137 Input_line_pointer->expression.
3139 Out: Input_line_pointer->just after any whitespace after expression.
3140 Tried to set symbol to value of expression.
3141 Will change symbols type, value, and frag; */
3144 pseudo_set (symbolS
*symbolP
)
3147 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3149 #endif /* OBJ_AOUT or OBJ_BOUT */
3151 know (symbolP
); /* NULL pointer is logic error. */
3152 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3153 ext
= S_IS_EXTERNAL (symbolP
);
3154 #endif /* OBJ_AOUT or OBJ_BOUT */
3156 (void) expression (&exp
);
3158 if (exp
.X_op
== O_illegal
)
3159 as_bad (_("illegal expression"));
3160 else if (exp
.X_op
== O_absent
)
3161 as_bad (_("missing expression"));
3162 else if (exp
.X_op
== O_big
)
3164 if (exp
.X_add_number
> 0)
3165 as_bad (_("bignum invalid"));
3167 as_bad (_("floating point number invalid"));
3169 else if (exp
.X_op
== O_subtract
3170 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
3171 && (symbol_get_frag (exp
.X_add_symbol
)
3172 == symbol_get_frag (exp
.X_op_symbol
)))
3174 exp
.X_op
= O_constant
;
3175 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
3176 - S_GET_VALUE (exp
.X_op_symbol
));
3184 exp
.X_add_number
= 0;
3187 S_SET_SEGMENT (symbolP
, absolute_section
);
3188 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3190 S_SET_EXTERNAL (symbolP
);
3192 S_CLEAR_EXTERNAL (symbolP
);
3193 #endif /* OBJ_AOUT or OBJ_BOUT */
3194 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3195 if (exp
.X_op
!= O_constant
)
3196 symbol_set_frag (symbolP
, &zero_address_frag
);
3200 S_SET_SEGMENT (symbolP
, reg_section
);
3201 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3202 symbol_set_frag (symbolP
, &zero_address_frag
);
3206 if (S_GET_SEGMENT (exp
.X_add_symbol
) == undefined_section
3207 || exp
.X_add_number
!= 0)
3208 symbol_set_value_expression (symbolP
, &exp
);
3209 else if (symbol_section_p (symbolP
))
3210 as_bad ("attempt to set value of section symbol");
3213 symbolS
*s
= exp
.X_add_symbol
;
3215 S_SET_SEGMENT (symbolP
, S_GET_SEGMENT (s
));
3216 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3218 S_SET_EXTERNAL (symbolP
);
3220 S_CLEAR_EXTERNAL (symbolP
);
3221 #endif /* OBJ_AOUT or OBJ_BOUT */
3222 S_SET_VALUE (symbolP
,
3223 exp
.X_add_number
+ S_GET_VALUE (s
));
3224 symbol_set_frag (symbolP
, symbol_get_frag (s
));
3225 copy_symbol_attributes (symbolP
, s
);
3230 /* The value is some complex expression.
3231 FIXME: Should we set the segment to anything? */
3232 symbol_set_value_expression (symbolP
, &exp
);
3239 CONStruct more frag of .bytes, or .words etc.
3240 Should need_pass_2 be 1 then emit no frag(s).
3241 This understands EXPRESSIONS.
3245 This has a split personality. We use expression() to read the
3246 value. We can detect if the value won't fit in a byte or word.
3247 But we can't detect if expression() discarded significant digits
3248 in the case of a long. Not worth the crocks required to fix it. */
3250 /* Select a parser for cons expressions. */
3252 /* Some targets need to parse the expression in various fancy ways.
3253 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3254 (for example, the HPPA does this). Otherwise, you can define
3255 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3256 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3257 are defined, which is the normal case, then only simple expressions
3262 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
3265 #ifndef TC_PARSE_CONS_EXPRESSION
3266 #ifdef BITFIELD_CONS_EXPRESSIONS
3267 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3269 parse_bitfield_cons (expressionS
*exp
, unsigned int nbytes
);
3271 #ifdef REPEAT_CONS_EXPRESSIONS
3272 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3274 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
3277 /* If we haven't gotten one yet, just call expression. */
3278 #ifndef TC_PARSE_CONS_EXPRESSION
3279 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3284 do_parse_cons_expression (expressionS
*exp
,
3285 int nbytes ATTRIBUTE_UNUSED
)
3287 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3291 /* Worker to do .byte etc statements.
3292 Clobbers input_line_pointer and checks end-of-line. */
3295 cons_worker (register int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
3303 #ifdef md_flush_pending_output
3304 md_flush_pending_output ();
3308 stop
= mri_comment_field (&stopc
);
3310 if (is_it_end_of_statement ())
3312 demand_empty_rest_of_line ();
3314 mri_comment_end (stop
, stopc
);
3318 #ifdef md_cons_align
3319 md_cons_align (nbytes
);
3327 parse_mri_cons (&exp
, (unsigned int) nbytes
);
3330 TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
3334 if (exp
.X_op
== O_symbol
)
3335 exp
.X_op
= O_symbol_rva
;
3337 as_fatal (_("rva without symbol"));
3339 emit_expr (&exp
, (unsigned int) nbytes
);
3342 while (*input_line_pointer
++ == ',');
3344 /* In MRI mode, after an odd number of bytes, we must align to an
3345 even word boundary, unless the next instruction is a dc.b, ds.b
3347 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
3348 mri_pending_align
= 1;
3350 input_line_pointer
--; /* Put terminator back into stream. */
3352 demand_empty_rest_of_line ();
3355 mri_comment_end (stop
, stopc
);
3361 cons_worker (size
, 0);
3367 cons_worker (size
, 1);
3370 /* Put the contents of expression EXP into the object file using
3371 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3374 emit_expr (expressionS
*exp
, unsigned int nbytes
)
3378 valueT extra_digit
= 0;
3380 /* Don't do anything if we are going to make another pass. */
3384 dot_value
= frag_now_fix ();
3388 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3389 appear as a four byte positive constant in the .line section,
3390 followed by a 2 byte 0xffff. Look for that case here. */
3392 static int dwarf_line
= -1;
3394 if (strcmp (segment_name (now_seg
), ".line") != 0)
3396 else if (dwarf_line
>= 0
3398 && exp
->X_op
== O_constant
3399 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
3400 listing_source_line ((unsigned int) dwarf_line
);
3401 else if (nbytes
== 4
3402 && exp
->X_op
== O_constant
3403 && exp
->X_add_number
>= 0)
3404 dwarf_line
= exp
->X_add_number
;
3409 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3410 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3411 AT_sibling (0x12) followed by a four byte address of the sibling
3412 followed by a 2 byte AT_name (0x38) followed by the name of the
3413 file. We look for that case here. */
3415 static int dwarf_file
= 0;
3417 if (strcmp (segment_name (now_seg
), ".debug") != 0)
3419 else if (dwarf_file
== 0
3421 && exp
->X_op
== O_constant
3422 && exp
->X_add_number
== 0x11)
3424 else if (dwarf_file
== 1
3426 && exp
->X_op
== O_constant
3427 && exp
->X_add_number
== 0x12)
3429 else if (dwarf_file
== 2
3432 else if (dwarf_file
== 3
3434 && exp
->X_op
== O_constant
3435 && exp
->X_add_number
== 0x38)
3440 /* The variable dwarf_file_string tells stringer that the string
3441 may be the name of the source file. */
3442 if (dwarf_file
== 4)
3443 dwarf_file_string
= 1;
3445 dwarf_file_string
= 0;
3450 if (check_eh_frame (exp
, &nbytes
))
3455 /* Allow `.word 0' in the absolute section. */
3456 if (now_seg
== absolute_section
)
3458 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
3459 as_bad (_("attempt to store value in absolute section"));
3460 abs_section_offset
+= nbytes
;
3464 /* Handle a negative bignum. */
3466 && exp
->X_add_number
== 0
3467 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
3468 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
3471 unsigned long carry
;
3473 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
3475 /* Negate the bignum: one's complement each digit and add 1. */
3477 for (i
= 0; i
< exp
->X_add_number
; i
++)
3481 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
3484 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
3485 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
3488 /* We can ignore any carry out, because it will be handled by
3489 extra_digit if it is needed. */
3491 extra_digit
= (valueT
) -1;
3495 if (op
== O_absent
|| op
== O_illegal
)
3497 as_warn (_("zero assumed for missing expression"));
3498 exp
->X_add_number
= 0;
3501 else if (op
== O_big
&& exp
->X_add_number
<= 0)
3503 as_bad (_("floating point number invalid"));
3504 exp
->X_add_number
= 0;
3507 else if (op
== O_register
)
3509 as_warn (_("register value used as expression"));
3513 p
= frag_more ((int) nbytes
);
3515 #ifndef WORKING_DOT_WORD
3516 /* If we have the difference of two symbols in a word, save it on
3517 the broken_words list. See the code in write.c. */
3518 if (op
== O_subtract
&& nbytes
== 2)
3520 struct broken_word
*x
;
3522 x
= (struct broken_word
*) xmalloc (sizeof (struct broken_word
));
3523 x
->next_broken_word
= broken_words
;
3526 x
->subseg
= now_subseg
;
3528 x
->word_goes_here
= p
;
3530 x
->add
= exp
->X_add_symbol
;
3531 x
->sub
= exp
->X_op_symbol
;
3532 x
->addnum
= exp
->X_add_number
;
3540 /* If we have an integer, but the number of bytes is too large to
3541 pass to md_number_to_chars, handle it as a bignum. */
3542 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
3547 if (!exp
->X_unsigned
&& exp
->X_add_number
< 0)
3548 extra_digit
= (valueT
) -1;
3549 val
= (valueT
) exp
->X_add_number
;
3553 generic_bignum
[gencnt
] = val
& LITTLENUM_MASK
;
3554 val
>>= LITTLENUM_NUMBER_OF_BITS
;
3558 op
= exp
->X_op
= O_big
;
3559 exp
->X_add_number
= gencnt
;
3562 if (op
== O_constant
)
3564 register valueT get
;
3565 register valueT use
;
3566 register valueT mask
;
3568 register valueT unmask
;
3570 /* JF << of >= number of bits in the object is undefined. In
3571 particular SPARC (Sun 4) has problems. */
3572 if (nbytes
>= sizeof (valueT
))
3575 if (nbytes
> sizeof (valueT
))
3578 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
3582 /* Don't store these bits. */
3583 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
3584 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
3587 unmask
= ~mask
; /* Do store these bits. */
3590 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3591 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
3594 get
= exp
->X_add_number
;
3596 if ((get
& mask
) != 0
3597 && ((get
& mask
) != mask
3598 || (get
& hibit
) == 0))
3599 { /* Leading bits contain both 0s & 1s. */
3600 as_warn (_("value 0x%lx truncated to 0x%lx"),
3601 (unsigned long) get
, (unsigned long) use
);
3603 /* Put bytes in right order. */
3604 md_number_to_chars (p
, use
, (int) nbytes
);
3606 else if (op
== O_big
)
3609 LITTLENUM_TYPE
*nums
;
3611 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
3613 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
3616 as_warn (_("bignum truncated to %d bytes"), nbytes
);
3620 if (target_big_endian
)
3622 while (nbytes
> size
)
3624 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
3625 nbytes
-= CHARS_PER_LITTLENUM
;
3626 p
+= CHARS_PER_LITTLENUM
;
3629 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
3630 while (size
>= CHARS_PER_LITTLENUM
)
3633 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
3634 size
-= CHARS_PER_LITTLENUM
;
3635 p
+= CHARS_PER_LITTLENUM
;
3640 nums
= generic_bignum
;
3641 while (size
>= CHARS_PER_LITTLENUM
)
3643 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
3645 size
-= CHARS_PER_LITTLENUM
;
3646 p
+= CHARS_PER_LITTLENUM
;
3647 nbytes
-= CHARS_PER_LITTLENUM
;
3650 while (nbytes
>= CHARS_PER_LITTLENUM
)
3652 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
3653 nbytes
-= CHARS_PER_LITTLENUM
;
3654 p
+= CHARS_PER_LITTLENUM
;
3660 memset (p
, 0, nbytes
);
3662 /* Now we need to generate a fixS to record the symbol value.
3663 This is easy for BFD. For other targets it can be more
3664 complex. For very complex cases (currently, the HPPA and
3665 NS32K), you can define TC_CONS_FIX_NEW to do whatever you
3666 want. For simpler cases, you can define TC_CONS_RELOC to be
3667 the name of the reloc code that should be stored in the fixS.
3668 If neither is defined, the code uses NO_RELOC if it is
3669 defined, and otherwise uses 0. */
3671 #ifdef BFD_ASSEMBLER
3672 #ifdef TC_CONS_FIX_NEW
3673 TC_CONS_FIX_NEW (frag_now
, p
- frag_now
->fr_literal
, nbytes
, exp
);
3676 bfd_reloc_code_real_type r
;
3693 as_bad (_("unsupported BFD relocation size %u"), nbytes
);
3697 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, (int) nbytes
, exp
,
3702 #ifdef TC_CONS_FIX_NEW
3703 TC_CONS_FIX_NEW (frag_now
, p
- frag_now
->fr_literal
, nbytes
, exp
);
3705 /* Figure out which reloc number to use. Use TC_CONS_RELOC if
3706 it is defined, otherwise use NO_RELOC if it is defined,
3708 #ifndef TC_CONS_RELOC
3710 #define TC_CONS_RELOC NO_RELOC
3712 #define TC_CONS_RELOC 0
3715 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, (int) nbytes
, exp
, 0,
3717 #endif /* TC_CONS_FIX_NEW */
3718 #endif /* BFD_ASSEMBLER */
3722 #ifdef BITFIELD_CONS_EXPRESSIONS
3724 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3725 w:x,y:z, where w and y are bitwidths and x and y are values. They
3726 then pack them all together. We do a little better in that we allow
3727 them in words, longs, etc. and we'll pack them in target byte order
3730 The rules are: pack least significant bit first, if a field doesn't
3731 entirely fit, put it in the next unit. Overflowing the bitfield is
3732 explicitly *not* even a warning. The bitwidth should be considered
3735 To use this function the tc-XXX.h file should define
3736 BITFIELD_CONS_EXPRESSIONS. */
3739 parse_bitfield_cons (exp
, nbytes
)
3741 unsigned int nbytes
;
3743 unsigned int bits_available
= BITS_PER_CHAR
* nbytes
;
3744 char *hold
= input_line_pointer
;
3746 (void) expression (exp
);
3748 if (*input_line_pointer
== ':')
3755 unsigned long width
;
3757 if (*input_line_pointer
!= ':')
3759 input_line_pointer
= hold
;
3761 } /* Next piece is not a bitfield. */
3763 /* In the general case, we can't allow
3764 full expressions with symbol
3765 differences and such. The relocation
3766 entries for symbols not defined in this
3767 assembly would require arbitrary field
3768 widths, positions, and masks which most
3769 of our current object formats don't
3772 In the specific case where a symbol
3773 *is* defined in this assembly, we
3774 *could* build fixups and track it, but
3775 this could lead to confusion for the
3776 backends. I'm lazy. I'll take any
3777 SEG_ABSOLUTE. I think that means that
3778 you can use a previous .set or
3779 .equ type symbol. xoxorich. */
3781 if (exp
->X_op
== O_absent
)
3783 as_warn (_("using a bit field width of zero"));
3784 exp
->X_add_number
= 0;
3785 exp
->X_op
= O_constant
;
3786 } /* Implied zero width bitfield. */
3788 if (exp
->X_op
!= O_constant
)
3790 *input_line_pointer
= '\0';
3791 as_bad (_("field width \"%s\" too complex for a bitfield"), hold
);
3792 *input_line_pointer
= ':';
3793 demand_empty_rest_of_line ();
3795 } /* Too complex. */
3797 if ((width
= exp
->X_add_number
) > (BITS_PER_CHAR
* nbytes
))
3799 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
3800 width
, nbytes
, (BITS_PER_CHAR
* nbytes
));
3801 width
= BITS_PER_CHAR
* nbytes
;
3804 if (width
> bits_available
)
3806 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
3807 input_line_pointer
= hold
;
3808 exp
->X_add_number
= value
;
3813 hold
= ++input_line_pointer
;
3815 (void) expression (exp
);
3816 if (exp
->X_op
!= O_constant
)
3818 char cache
= *input_line_pointer
;
3820 *input_line_pointer
= '\0';
3821 as_bad (_("field value \"%s\" too complex for a bitfield"), hold
);
3822 *input_line_pointer
= cache
;
3823 demand_empty_rest_of_line ();
3825 } /* Too complex. */
3827 value
|= ((~(-1 << width
) & exp
->X_add_number
)
3828 << ((BITS_PER_CHAR
* nbytes
) - bits_available
));
3830 if ((bits_available
-= width
) == 0
3831 || is_it_end_of_statement ()
3832 || *input_line_pointer
!= ',')
3835 } /* All the bitfields we're gonna get. */
3837 hold
= ++input_line_pointer
;
3838 (void) expression (exp
);
3841 exp
->X_add_number
= value
;
3842 exp
->X_op
= O_constant
;
3843 exp
->X_unsigned
= 1;
3847 #endif /* BITFIELD_CONS_EXPRESSIONS */
3849 /* Handle an MRI style string expression. */
3853 parse_mri_cons (exp
, nbytes
)
3855 unsigned int nbytes
;
3857 if (*input_line_pointer
!= '\''
3858 && (input_line_pointer
[1] != '\''
3859 || (*input_line_pointer
!= 'A'
3860 && *input_line_pointer
!= 'E')))
3861 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3865 unsigned int result
= 0;
3867 /* An MRI style string. Cut into as many bytes as will fit into
3868 a nbyte chunk, left justify if necessary, and separate with
3869 commas so we can try again later. */
3870 if (*input_line_pointer
== 'A')
3871 ++input_line_pointer
;
3872 else if (*input_line_pointer
== 'E')
3874 as_bad (_("EBCDIC constants are not supported"));
3875 ++input_line_pointer
;
3878 input_line_pointer
++;
3879 for (scan
= 0; scan
< nbytes
; scan
++)
3881 if (*input_line_pointer
== '\'')
3883 if (input_line_pointer
[1] == '\'')
3885 input_line_pointer
++;
3890 result
= (result
<< 8) | (*input_line_pointer
++);
3894 while (scan
< nbytes
)
3900 /* Create correct expression. */
3901 exp
->X_op
= O_constant
;
3902 exp
->X_add_number
= result
;
3904 /* Fake it so that we can read the next char too. */
3905 if (input_line_pointer
[0] != '\'' ||
3906 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
3908 input_line_pointer
-= 2;
3909 input_line_pointer
[0] = ',';
3910 input_line_pointer
[1] = '\'';
3913 input_line_pointer
++;
3916 #endif /* TC_M68K */
3918 #ifdef REPEAT_CONS_EXPRESSIONS
3920 /* Parse a repeat expression for cons. This is used by the MIPS
3921 assembler. The format is NUMBER:COUNT; NUMBER appears in the
3922 object file COUNT times.
3924 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
3927 parse_repeat_cons (exp
, nbytes
)
3929 unsigned int nbytes
;
3936 if (*input_line_pointer
!= ':')
3938 /* No repeat count. */
3942 ++input_line_pointer
;
3943 expression (&count
);
3944 if (count
.X_op
!= O_constant
3945 || count
.X_add_number
<= 0)
3947 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
3951 /* The cons function is going to output this expression once. So we
3952 output it count - 1 times. */
3953 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
3954 emit_expr (exp
, nbytes
);
3957 #endif /* REPEAT_CONS_EXPRESSIONS */
3959 /* Parse a floating point number represented as a hex constant. This
3960 permits users to specify the exact bits they want in the floating
3964 hex_float (int float_type
, char *bytes
)
3996 as_bad (_("unknown floating type type '%c'"), float_type
);
4000 /* It would be nice if we could go through expression to parse the
4001 hex constant, but if we get a bignum it's a pain to sort it into
4002 the buffer correctly. */
4004 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4008 /* The MRI assembler accepts arbitrary underscores strewn about
4009 through the hex constant, so we ignore them as well. */
4010 if (*input_line_pointer
== '_')
4012 ++input_line_pointer
;
4018 as_warn (_("floating point constant too large"));
4021 d
= hex_value (*input_line_pointer
) << 4;
4022 ++input_line_pointer
;
4023 while (*input_line_pointer
== '_')
4024 ++input_line_pointer
;
4025 if (hex_p (*input_line_pointer
))
4027 d
+= hex_value (*input_line_pointer
);
4028 ++input_line_pointer
;
4030 if (target_big_endian
)
4033 bytes
[length
- i
- 1] = d
;
4039 if (target_big_endian
)
4040 memset (bytes
+ i
, 0, length
- i
);
4042 memset (bytes
, 0, length
- i
);
4050 CONStruct some more frag chars of .floats .ffloats etc.
4051 Makes 0 or more new frags.
4052 If need_pass_2 == 1, no frags are emitted.
4053 This understands only floating literals, not expressions. Sorry.
4055 A floating constant is defined by atof_generic(), except it is preceded
4056 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4057 reading, I decided to be incompatible. This always tries to give you
4058 rounded bits to the precision of the pseudo-op. Former AS did premature
4059 truncation, restored noisy bits instead of trailing 0s AND gave you
4060 a choice of 2 flavours of noise according to which of 2 floating-point
4061 scanners you directed AS to use.
4063 In: input_line_pointer->whitespace before, or '0' of flonum. */
4066 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4067 register int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4070 int length
; /* Number of chars in an object. */
4071 register char *err
; /* Error from scanning floating literal. */
4072 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4074 if (is_it_end_of_statement ())
4076 demand_empty_rest_of_line ();
4080 #ifdef md_flush_pending_output
4081 md_flush_pending_output ();
4086 /* input_line_pointer->1st char of a flonum (we hope!). */
4089 /* Skip any 0{letter} that may be present. Don't even check if the
4090 letter is legal. Someone may invent a "z" format and this routine
4091 has no use for such information. Lusers beware: you get
4092 diagnostics if your input is ill-conditioned. */
4093 if (input_line_pointer
[0] == '0'
4094 && ISALPHA (input_line_pointer
[1]))
4095 input_line_pointer
+= 2;
4097 /* Accept :xxxx, where the x's are hex digits, for a floating
4098 point with the exact digits specified. */
4099 if (input_line_pointer
[0] == ':')
4101 ++input_line_pointer
;
4102 length
= hex_float (float_type
, temp
);
4105 ignore_rest_of_line ();
4111 err
= md_atof (float_type
, temp
, &length
);
4112 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
4116 as_bad (_("bad floating literal: %s"), err
);
4117 ignore_rest_of_line ();
4128 #ifdef REPEAT_CONS_EXPRESSIONS
4129 if (*input_line_pointer
== ':')
4131 expressionS count_exp
;
4133 ++input_line_pointer
;
4134 expression (&count_exp
);
4136 if (count_exp
.X_op
!= O_constant
4137 || count_exp
.X_add_number
<= 0)
4138 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4140 count
= count_exp
.X_add_number
;
4144 while (--count
>= 0)
4146 p
= frag_more (length
);
4147 memcpy (p
, temp
, (unsigned int) length
);
4152 while (*input_line_pointer
++ == ',');
4154 /* Put terminator back into stream. */
4155 --input_line_pointer
;
4156 demand_empty_rest_of_line ();
4159 /* Return the size of a LEB128 value. */
4162 sizeof_sleb128 (offsetT value
)
4164 register int size
= 0;
4165 register unsigned byte
;
4169 byte
= (value
& 0x7f);
4170 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4171 Fortunately, we can structure things so that the extra work reduces
4172 to a noop on systems that do things "properly". */
4173 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4176 while (!(((value
== 0) && ((byte
& 0x40) == 0))
4177 || ((value
== -1) && ((byte
& 0x40) != 0))));
4183 sizeof_uleb128 (valueT value
)
4185 register int size
= 0;
4186 register unsigned byte
;
4190 byte
= (value
& 0x7f);
4200 sizeof_leb128 (valueT value
, int sign
)
4203 return sizeof_sleb128 ((offsetT
) value
);
4205 return sizeof_uleb128 (value
);
4208 /* Output a LEB128 value. */
4211 output_sleb128 (char *p
, offsetT value
)
4213 register char *orig
= p
;
4218 unsigned byte
= (value
& 0x7f);
4220 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4221 Fortunately, we can structure things so that the extra work reduces
4222 to a noop on systems that do things "properly". */
4223 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4225 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
4226 || ((value
== -1) && ((byte
& 0x40) != 0))));
4238 output_uleb128 (char *p
, valueT value
)
4244 unsigned byte
= (value
& 0x7f);
4247 /* More bytes to follow. */
4258 output_leb128 (char *p
, valueT value
, int sign
)
4261 return output_sleb128 (p
, (offsetT
) value
);
4263 return output_uleb128 (p
, value
);
4266 /* Do the same for bignums. We combine sizeof with output here in that
4267 we don't output for NULL values of P. It isn't really as critical as
4268 for "normal" values that this be streamlined. */
4271 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4278 /* Strip leading sign extensions off the bignum. */
4279 while (size
> 0 && bignum
[size
- 1] == (LITTLENUM_TYPE
) -1)
4284 if (loaded
< 7 && size
> 0)
4286 val
|= (*bignum
<< loaded
);
4287 loaded
+= 8 * CHARS_PER_LITTLENUM
;
4298 if ((val
== 0 && (byte
& 0x40) == 0)
4299 || (~(val
| ~(((valueT
) 1 << loaded
) - 1)) == 0
4300 && (byte
& 0x40) != 0))
4308 while (byte
& 0x80);
4314 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4321 /* Strip leading zeros off the bignum. */
4322 /* XXX: Is this needed? */
4323 while (size
> 0 && bignum
[size
- 1] == 0)
4328 if (loaded
< 7 && size
> 0)
4330 val
|= (*bignum
<< loaded
);
4331 loaded
+= 8 * CHARS_PER_LITTLENUM
;
4340 if (size
> 0 || val
)
4347 while (byte
& 0x80);
4353 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
, int sign
)
4356 return output_big_sleb128 (p
, bignum
, size
);
4358 return output_big_uleb128 (p
, bignum
, size
);
4361 /* Generate the appropriate fragments for a given expression to emit a
4365 emit_leb128_expr (expressionS
*exp
, int sign
)
4367 operatorT op
= exp
->X_op
;
4370 if (op
== O_absent
|| op
== O_illegal
)
4372 as_warn (_("zero assumed for missing expression"));
4373 exp
->X_add_number
= 0;
4376 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4378 as_bad (_("floating point number invalid"));
4379 exp
->X_add_number
= 0;
4382 else if (op
== O_register
)
4384 as_warn (_("register value used as expression"));
4388 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
4389 a signal that this is leb128 data. It shouldn't optimize this away. */
4391 if (check_eh_frame (exp
, &nbytes
))
4394 /* Let the backend know that subsequent data may be byte aligned. */
4395 #ifdef md_cons_align
4399 if (op
== O_constant
)
4401 /* If we've got a constant, emit the thing directly right now. */
4403 valueT value
= exp
->X_add_number
;
4407 size
= sizeof_leb128 (value
, sign
);
4408 p
= frag_more (size
);
4409 output_leb128 (p
, value
, sign
);
4411 else if (op
== O_big
)
4413 /* O_big is a different sort of constant. */
4418 size
= output_big_leb128 (NULL
, generic_bignum
, exp
->X_add_number
, sign
);
4419 p
= frag_more (size
);
4420 output_big_leb128 (p
, generic_bignum
, exp
->X_add_number
, sign
);
4424 /* Otherwise, we have to create a variable sized fragment and
4425 resolve things later. */
4427 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
4428 make_expr_symbol (exp
), 0, (char *) NULL
);
4432 /* Parse the .sleb128 and .uleb128 pseudos. */
4439 #ifdef md_flush_pending_output
4440 md_flush_pending_output ();
4446 emit_leb128_expr (&exp
, sign
);
4448 while (*input_line_pointer
++ == ',');
4450 input_line_pointer
--;
4451 demand_empty_rest_of_line ();
4454 /* We read 0 or more ',' separated, double-quoted strings.
4455 Caller should have checked need_pass_2 is FALSE because we don't
4459 stringer (/* Worker to do .ascii etc statements. */
4460 /* Checks end-of-line. */
4461 register int append_zero
/* 0: don't append '\0', else 1. */)
4463 register unsigned int c
;
4466 #ifdef md_flush_pending_output
4467 md_flush_pending_output ();
4470 /* The following awkward logic is to parse ZERO or more strings,
4471 comma separated. Recall a string expression includes spaces
4472 before the opening '\"' and spaces after the closing '\"'.
4473 We fake a leading ',' if there is (supposed to be)
4474 a 1st, expression. We keep demanding expressions for each ','. */
4475 if (is_it_end_of_statement ())
4477 c
= 0; /* Skip loop. */
4478 ++input_line_pointer
; /* Compensate for end of loop. */
4482 c
= ','; /* Do loop. */
4484 /* If we have been switched into the abs_section then we
4485 will not have an obstack onto which we can hang strings. */
4486 if (now_seg
== absolute_section
)
4488 as_bad (_("strings must be placed into a section"));
4490 ignore_rest_of_line ();
4493 while (c
== ',' || c
== '<' || c
== '"')
4496 switch (*input_line_pointer
)
4499 ++input_line_pointer
; /*->1st char of string. */
4500 start
= input_line_pointer
;
4501 while (is_a_char (c
= next_char_of_string ()))
4503 FRAG_APPEND_1_CHAR (c
);
4507 FRAG_APPEND_1_CHAR (0);
4509 know (input_line_pointer
[-1] == '\"');
4513 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
4514 will emit .string with a filename in the .debug section
4515 after a sequence of constants. See the comment in
4516 emit_expr for the sequence. emit_expr will set
4517 dwarf_file_string to non-zero if this string might be a
4518 source file name. */
4519 if (strcmp (segment_name (now_seg
), ".debug") != 0)
4520 dwarf_file_string
= 0;
4521 else if (dwarf_file_string
)
4523 c
= input_line_pointer
[-1];
4524 input_line_pointer
[-1] = '\0';
4525 listing_source_file (start
);
4526 input_line_pointer
[-1] = c
;
4533 input_line_pointer
++;
4534 c
= get_single_number ();
4535 FRAG_APPEND_1_CHAR (c
);
4536 if (*input_line_pointer
!= '>')
4538 as_bad (_("expected <nn>"));
4540 input_line_pointer
++;
4543 input_line_pointer
++;
4547 c
= *input_line_pointer
;
4550 demand_empty_rest_of_line ();
4553 /* FIXME-SOMEDAY: I had trouble here on characters with the
4554 high bits set. We'll probably also have trouble with
4555 multibyte chars, wide chars, etc. Also be careful about
4556 returning values bigger than 1 byte. xoxorich. */
4559 next_char_of_string (void)
4561 register unsigned int c
;
4563 c
= *input_line_pointer
++ & CHAR_MASK
;
4571 as_warn (_("unterminated string; newline inserted"));
4572 bump_line_counters ();
4575 #ifndef NO_STRING_ESCAPES
4577 switch (c
= *input_line_pointer
++)
4605 break; /* As itself. */
4621 for (i
= 0, number
= 0;
4622 ISDIGIT (c
) && i
< 3;
4623 c
= *input_line_pointer
++, i
++)
4625 number
= number
* 8 + c
- '0';
4630 --input_line_pointer
;
4639 c
= *input_line_pointer
++;
4640 while (ISXDIGIT (c
))
4643 number
= number
* 16 + c
- '0';
4644 else if (ISUPPER (c
))
4645 number
= number
* 16 + c
- 'A' + 10;
4647 number
= number
* 16 + c
- 'a' + 10;
4648 c
= *input_line_pointer
++;
4651 --input_line_pointer
;
4656 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
4657 as_warn (_("unterminated string; newline inserted"));
4659 bump_line_counters ();
4664 #ifdef ONLY_STANDARD_ESCAPES
4665 as_bad (_("bad escaped character in string"));
4667 #endif /* ONLY_STANDARD_ESCAPES */
4672 #endif /* ! defined (NO_STRING_ESCAPES) */
4681 get_segmented_expression (register expressionS
*expP
)
4683 register segT retval
;
4685 retval
= expression (expP
);
4686 if (expP
->X_op
== O_illegal
4687 || expP
->X_op
== O_absent
4688 || expP
->X_op
== O_big
)
4690 as_bad (_("expected address expression"));
4691 expP
->X_op
= O_constant
;
4692 expP
->X_add_number
= 0;
4693 retval
= absolute_section
;
4699 get_known_segmented_expression (register expressionS
*expP
)
4701 register segT retval
;
4703 if ((retval
= get_segmented_expression (expP
)) == undefined_section
)
4705 /* There is no easy way to extract the undefined symbol from the
4707 if (expP
->X_add_symbol
!= NULL
4708 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
4709 as_warn (_("symbol \"%s\" undefined; zero assumed"),
4710 S_GET_NAME (expP
->X_add_symbol
));
4712 as_warn (_("some symbol undefined; zero assumed"));
4713 retval
= absolute_section
;
4714 expP
->X_op
= O_constant
;
4715 expP
->X_add_number
= 0;
4717 know (retval
== absolute_section
|| SEG_NORMAL (retval
));
4722 get_absolute_expr (expressionS
*exp
)
4725 if (exp
->X_op
!= O_constant
)
4727 if (exp
->X_op
!= O_absent
)
4728 as_bad (_("bad or irreducible absolute expression"));
4729 exp
->X_add_number
= 0;
4731 return exp
->X_add_number
;
4735 get_absolute_expression (void)
4739 return get_absolute_expr (&exp
);
4742 char /* Return terminator. */
4743 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
4745 /* FIXME: val_pointer should probably be offsetT *. */
4746 *val_pointer
= (long) get_absolute_expression ();
4747 return (*input_line_pointer
++);
4750 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
4751 Give a warning if that happens. */
4754 demand_copy_C_string (int *len_pointer
)
4758 if ((s
= demand_copy_string (len_pointer
)) != 0)
4762 for (len
= *len_pointer
; len
> 0; len
--)
4769 as_bad (_("this string may not contain \'\\0\'"));
4777 /* Demand string, but return a safe (=private) copy of the string.
4778 Return NULL if we can't read a string here. */
4781 demand_copy_string (int *lenP
)
4783 register unsigned int c
;
4789 if (*input_line_pointer
== '\"')
4791 input_line_pointer
++; /* Skip opening quote. */
4793 while (is_a_char (c
= next_char_of_string ()))
4795 obstack_1grow (¬es
, c
);
4798 /* JF this next line is so demand_copy_C_string will return a
4799 null terminated string. */
4800 obstack_1grow (¬es
, '\0');
4801 retval
= obstack_finish (¬es
);
4805 as_bad (_("missing string"));
4807 ignore_rest_of_line ();
4813 /* In: Input_line_pointer->next character.
4815 Do: Skip input_line_pointer over all whitespace.
4817 Out: 1 if input_line_pointer->end-of-line. */
4820 is_it_end_of_statement (void)
4823 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
4827 equals (char *sym_name
, int reassign
)
4829 register symbolS
*symbolP
; /* Symbol we are working with. */
4833 input_line_pointer
++;
4834 if (*input_line_pointer
== '=')
4835 input_line_pointer
++;
4837 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
4838 input_line_pointer
++;
4841 stop
= mri_comment_field (&stopc
);
4843 if (sym_name
[0] == '.' && sym_name
[1] == '\0')
4845 /* Turn '. = mumble' into a .org mumble. */
4846 register segT segment
;
4849 segment
= get_known_segmented_expression (&exp
);
4851 do_org (segment
, &exp
, 0);
4858 symbolP
= symbol_find (sym_name
);
4859 local
= symbolP
== NULL
;
4861 #endif /* OBJ_COFF */
4862 symbolP
= symbol_find_or_make (sym_name
);
4863 /* Permit register names to be redefined. */
4865 && S_IS_DEFINED (symbolP
)
4866 && S_GET_SEGMENT (symbolP
) != reg_section
)
4867 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (symbolP
));
4870 /* "set" symbols are local unless otherwise specified. */
4872 SF_SET_LOCAL (symbolP
);
4873 #endif /* OBJ_COFF */
4875 pseudo_set (symbolP
);
4880 /* Check garbage after the expression. */
4881 demand_empty_rest_of_line ();
4882 mri_comment_end (stop
, stopc
);
4886 /* .incbin -- include a file verbatim at the current location. */
4889 s_incbin (int x ATTRIBUTE_UNUSED
)
4900 #ifdef md_flush_pending_output
4901 md_flush_pending_output ();
4905 filename
= demand_copy_string (& len
);
4906 if (filename
== NULL
)
4911 /* Look for optional skip and count. */
4912 if (* input_line_pointer
== ',')
4914 ++ input_line_pointer
;
4915 skip
= get_absolute_expression ();
4919 if (* input_line_pointer
== ',')
4921 ++ input_line_pointer
;
4923 count
= get_absolute_expression ();
4925 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
4931 demand_empty_rest_of_line ();
4933 /* Try opening absolute path first, then try include dirs. */
4934 binfile
= fopen (filename
, FOPEN_RB
);
4935 if (binfile
== NULL
)
4939 path
= xmalloc ((unsigned long) len
+ include_dir_maxlen
+ 5);
4941 for (i
= 0; i
< include_dir_count
; i
++)
4943 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
4945 binfile
= fopen (path
, FOPEN_RB
);
4946 if (binfile
!= NULL
)
4950 if (binfile
== NULL
)
4951 as_bad (_("file not found: %s"), filename
);
4954 path
= xstrdup (filename
);
4960 register_dependency (path
);
4962 /* Compute the length of the file. */
4963 if (fseek (binfile
, 0, SEEK_END
) != 0)
4965 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
4968 file_len
= ftell (binfile
);
4970 /* If a count was not specified use the size of the file. */
4974 if (skip
+ count
> file_len
)
4976 as_bad (_("skip (%ld) + count (%ld) larger than file size (%ld)"),
4977 skip
, count
, file_len
);
4981 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
4983 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
4987 /* Allocate frag space and store file contents in it. */
4988 binfrag
= frag_more (count
);
4990 bytes
= fread (binfrag
, 1, count
, binfile
);
4992 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
4993 path
, bytes
, count
);
4996 if (binfile
!= NULL
)
5002 /* .include -- include a file at this point. */
5005 s_include (int arg ATTRIBUTE_UNUSED
)
5014 filename
= demand_copy_string (&i
);
5015 if (filename
== NULL
)
5017 /* demand_copy_string has already printed an error and
5018 called ignore_rest_of_line. */
5026 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
5027 && *input_line_pointer
!= ' '
5028 && *input_line_pointer
!= '\t')
5030 obstack_1grow (¬es
, *input_line_pointer
);
5031 ++input_line_pointer
;
5035 obstack_1grow (¬es
, '\0');
5036 filename
= obstack_finish (¬es
);
5037 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5038 ++input_line_pointer
;
5041 demand_empty_rest_of_line ();
5042 path
= xmalloc ((unsigned long) i
+ include_dir_maxlen
+ 5 /* slop */ );
5044 for (i
= 0; i
< include_dir_count
; i
++)
5046 strcpy (path
, include_dirs
[i
]);
5048 strcat (path
, filename
);
5049 if (0 != (try = fopen (path
, FOPEN_RT
)))
5059 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5060 register_dependency (path
);
5061 input_scrub_insert_file (path
);
5065 add_include_dir (char *path
)
5069 if (include_dir_count
== 0)
5071 include_dirs
= (char **) xmalloc (2 * sizeof (*include_dirs
));
5072 include_dirs
[0] = "."; /* Current dir. */
5073 include_dir_count
= 2;
5077 include_dir_count
++;
5079 (char **) realloc (include_dirs
,
5080 include_dir_count
* sizeof (*include_dirs
));
5083 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
5086 if (i
> include_dir_maxlen
)
5087 include_dir_maxlen
= i
;
5090 /* Output debugging information to denote the source file. */
5093 generate_file_debug (void)
5095 if (debug_type
== DEBUG_STABS
)
5096 stabs_generate_asm_file ();
5099 /* Output line number debugging information for the current source line. */
5102 generate_lineno_debug (void)
5106 case DEBUG_UNSPECIFIED
:
5111 stabs_generate_asm_lineno ();
5114 ecoff_generate_asm_lineno ();
5117 /* ??? We could here indicate to dwarf2dbg.c that something
5118 has changed. However, since there is additional backend
5119 support that is required (calling dwarf2_emit_insn), we
5120 let dwarf2dbg.c call as_where on its own. */
5125 /* Output debugging information to mark a function entry point or end point.
5126 END_P is zero for .func, and non-zero for .endfunc. */
5131 do_s_func (end_p
, NULL
);
5134 /* Subroutine of s_func so targets can choose a different default prefix.
5135 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5138 do_s_func (int end_p
, const char *default_prefix
)
5140 /* Record the current function so that we can issue an error message for
5141 misplaced .func,.endfunc, and also so that .endfunc needs no
5143 static char *current_name
;
5144 static char *current_label
;
5148 if (current_name
== NULL
)
5150 as_bad (_("missing .func"));
5151 ignore_rest_of_line ();
5155 if (debug_type
== DEBUG_STABS
)
5156 stabs_generate_asm_endfunc (current_name
, current_label
);
5158 current_name
= current_label
= NULL
;
5163 char delim1
, delim2
;
5165 if (current_name
!= NULL
)
5167 as_bad (_(".endfunc missing for previous .func"));
5168 ignore_rest_of_line ();
5172 name
= input_line_pointer
;
5173 delim1
= get_symbol_end ();
5174 name
= xstrdup (name
);
5175 *input_line_pointer
= delim1
;
5177 if (*input_line_pointer
!= ',')
5180 asprintf (&label
, "%s%s", default_prefix
, name
);
5183 char leading_char
= 0;
5184 #ifdef BFD_ASSEMBLER
5185 leading_char
= bfd_get_symbol_leading_char (stdoutput
);
5187 /* Missing entry point, use function's name with the leading
5190 asprintf (&label
, "%c%s", leading_char
, name
);
5197 ++input_line_pointer
;
5199 label
= input_line_pointer
;
5200 delim2
= get_symbol_end ();
5201 label
= xstrdup (label
);
5202 *input_line_pointer
= delim2
;
5205 if (debug_type
== DEBUG_STABS
)
5206 stabs_generate_asm_func (name
, label
);
5208 current_name
= name
;
5209 current_label
= label
;
5212 demand_empty_rest_of_line ();
5216 s_ignore (int arg ATTRIBUTE_UNUSED
)
5218 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5220 ++input_line_pointer
;
5222 ++input_line_pointer
;
5226 read_print_statistics (FILE *file
)
5228 hash_print_statistics (file
, "pseudo-op table", po_hash
);
5231 /* Inserts the given line into the input stream.
5233 This call avoids macro/conditionals nesting checking, since the contents of
5234 the line are assumed to replace the contents of a line already scanned.
5236 An appropriate use of this function would be substitution of input lines when
5237 called by md_start_line_hook(). The given line is assumed to already be
5238 properly scrubbed. */
5241 input_scrub_insert_line (const char *line
)
5245 sb_add_string (&newline
, line
);
5246 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
5248 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5251 /* Insert a file into the input stream; the path must resolve to an actual
5252 file; no include path searching or dependency registering is performed. */
5255 input_scrub_insert_file (char *path
)
5257 input_scrub_include_file (path
, input_line_pointer
);
5258 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);