1 /* read.c - read a source file -
2 Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
3 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
4 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
23 /* If your chars aren't 8 bits, you will change this a bit (eg. to 0xFF).
24 But then, GNU isn't spozed to run on your machine anyway.
25 (RMS is so shortsighted sometimes.) */
26 #define MASK_CHAR ((int)(unsigned char) -1)
28 /* This is the largest known floating point format (for now). It will
29 grow when we do 4361 style flonums. */
30 #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
32 /* Routines that read assembler source text to build spaghetti in memory.
33 Another group of these functions is in the expr.c module. */
36 #include "safe-ctype.h"
43 #include "dw2gencfi.h"
45 #ifndef TC_START_LABEL
46 #define TC_START_LABEL(x,y) (x == ':')
49 /* Set by the object-format or the target. */
50 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
51 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
56 else if ((SIZE) >= 4) \
58 else if ((SIZE) >= 2) \
66 char *input_line_pointer
; /*->next char of source file to parse. */
68 #if BITS_PER_CHAR != 8
69 /* The following table is indexed by[(char)] and will break if
70 a char does not have exactly 256 states (hopefully 0:255!)! */
75 /* The m88k unfortunately uses @ as a label beginner. */
80 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
85 /* The Delta 68k assembler permits % inside label names. */
90 /* The PowerPC Windows NT assemblers permits ? inside label names. */
95 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
96 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
101 /* The a29k assembler does not permits labels to start with $. */
106 /* The Delta 68k assembler permits ~ at start of label names. */
110 /* Used by is_... macros. our ctype[]. */
111 char lex_type
[256] = {
112 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
113 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
114 0, 0, 0, LEX_HASH
, LEX_DOLLAR
, LEX_PCT
, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
115 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM
, /* 0123456789:;<=>? */
116 LEX_AT
, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
117 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, 0, 3, /* PQRSTUVWXYZ[\]^_ */
118 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
119 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, LEX_TILDE
, 0, /* pqrstuvwxyz{|}~. */
120 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
121 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
122 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
123 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
124 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
125 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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
131 Out: 1 if this character ends a line. */
132 char is_end_of_line
[256] = {
134 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
136 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
140 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
141 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
142 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
143 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
144 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
145 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
146 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
147 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
148 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
150 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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 /* */
155 #ifndef TC_CASE_SENSITIVE
156 char original_case_string
[128];
159 /* Functions private to this file. */
161 static char *buffer
; /* 1st char of each buffer of lines is here. */
162 static char *buffer_limit
; /*->1 + last char in buffer. */
164 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
165 in the tc-<CPU>.h file. See the "Porting GAS" section of the
167 int target_big_endian
= TARGET_BYTES_BIG_ENDIAN
;
169 /* Variables for handling include file directory table. */
171 /* Table of pointers to directories to search for .include's. */
174 /* How many are in the table. */
175 int include_dir_count
;
177 /* Length of longest in table. */
178 int include_dir_maxlen
= 1;
180 #ifndef WORKING_DOT_WORD
181 struct broken_word
*broken_words
;
182 int new_broken_words
;
185 /* The current offset into the absolute section. We don't try to
186 build frags in the absolute section, since no data can be stored
187 there. We just keep track of the current offset. */
188 addressT abs_section_offset
;
190 /* If this line had an MRI style label, it is stored in this variable.
191 This is used by some of the MRI pseudo-ops. */
194 /* This global variable is used to support MRI common sections. We
195 translate such sections into a common symbol. This variable is
196 non-NULL when we are in an MRI common section. */
197 symbolS
*mri_common_symbol
;
199 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
200 need to align to an even byte boundary unless the next pseudo-op is
201 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
203 static int mri_pending_align
;
207 /* This variable is set to be non-zero if the next string we see might
208 be the name of the source file in DWARF debugging information. See
209 the comment in emit_expr for the format we look for. */
210 static int dwarf_file_string
;
214 static void do_align (int, char *, int, int);
215 static void s_align (int, int);
216 static void s_altmacro (int);
217 static void s_bad_end (int);
218 static int hex_float (int, char *);
219 static segT
get_known_segmented_expression (expressionS
* expP
);
220 static void pobegin (void);
221 static int get_line_sb (sb
*);
222 static void generate_file_debug (void);
230 obj_read_begin_hook ();
232 /* Something close -- but not too close -- to a multiple of 1024.
233 The debugging malloc I'm using has 24 bytes of overhead. */
234 obstack_begin (¬es
, chunksize
);
235 obstack_begin (&cond_obstack
, chunksize
);
237 /* Use machine dependent syntax. */
238 for (p
= line_separator_chars
; *p
; p
++)
239 is_end_of_line
[(unsigned char) *p
] = 1;
240 /* Use more. FIXME-SOMEDAY. */
246 #ifndef TC_ADDRESS_BYTES
248 #define TC_ADDRESS_BYTES address_bytes
253 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
254 contain an address. */
255 int n
= (stdoutput
->arch_info
->bits_per_address
- 1) / 8;
264 /* Set up pseudo-op tables. */
266 static struct hash_control
*po_hash
;
268 static const pseudo_typeS potable
[] = {
269 {"abort", s_abort
, 0},
270 {"align", s_align_ptwo
, 0},
271 {"altmacro", s_altmacro
, 1},
272 {"ascii", stringer
, 0},
273 {"asciz", stringer
, 1},
274 {"balign", s_align_bytes
, 0},
275 {"balignw", s_align_bytes
, -2},
276 {"balignl", s_align_bytes
, -4},
280 {"common", s_mri_common
, 0},
281 {"common.s", s_mri_common
, 1},
284 #ifdef TC_ADDRESS_BYTES
288 {"dc.d", float_cons
, 'd'},
290 {"dc.s", float_cons
, 'f'},
292 {"dc.x", float_cons
, 'x'},
294 {"dcb.b", s_space
, 1},
295 {"dcb.d", s_float_space
, 'd'},
296 {"dcb.l", s_space
, 4},
297 {"dcb.s", s_float_space
, 'f'},
298 {"dcb.w", s_space
, 2},
299 {"dcb.x", s_float_space
, 'x'},
301 {"ds.b", s_space
, 1},
302 {"ds.d", s_space
, 8},
303 {"ds.l", s_space
, 4},
304 {"ds.p", s_space
, 12},
305 {"ds.s", s_space
, 4},
306 {"ds.w", s_space
, 2},
307 {"ds.x", s_space
, 12},
308 {"debug", s_ignore
, 0},
313 {"double", float_cons
, 'd'},
315 {"eject", listing_eject
, 0}, /* Formfeed listing. */
317 {"elsec", s_else
, 0},
318 {"elseif", s_elseif
, (int) O_ne
},
320 {"endc", s_endif
, 0},
321 {"endfunc", s_func
, 1},
322 {"endif", s_endif
, 0},
323 {"endm", s_bad_end
, 0},
324 {"endr", s_bad_end
, 1},
329 {"error", s_errwarn
, 1},
330 {"exitm", s_mexit
, 0},
332 {"extern", s_ignore
, 0}, /* We treat all undef as ext. */
333 {"appfile", s_app_file
, 1},
334 {"appline", s_app_line
, 0},
336 {"file", s_app_file
, 0},
338 {"float", float_cons
, 'f'},
339 {"format", s_ignore
, 0},
341 {"global", s_globl
, 0},
342 {"globl", s_globl
, 0},
344 {"if", s_if
, (int) O_ne
},
346 {"ifdef", s_ifdef
, 0},
347 {"ifeq", s_if
, (int) O_eq
},
348 {"ifeqs", s_ifeqs
, 0},
349 {"ifge", s_if
, (int) O_ge
},
350 {"ifgt", s_if
, (int) O_gt
},
351 {"ifle", s_if
, (int) O_le
},
352 {"iflt", s_if
, (int) O_lt
},
354 {"ifndef", s_ifdef
, 1},
355 {"ifne", s_if
, (int) O_ne
},
356 {"ifnes", s_ifeqs
, 1},
357 {"ifnotdef", s_ifdef
, 1},
358 {"incbin", s_incbin
, 0},
359 {"include", s_include
, 0},
365 {"lcomm", s_lcomm
, 0},
366 {"lflags", listing_flags
, 0}, /* Listing flags. */
367 {"linkonce", s_linkonce
, 0},
368 {"list", listing_list
, 1}, /* Turn listing on. */
369 {"llen", listing_psize
, 1},
372 {"macro", s_macro
, 0},
373 {"mexit", s_mexit
, 0},
375 {".mri", s_mri
, 0}, /* Special case so .mri works in MRI mode. */
376 {"name", s_ignore
, 0},
377 {"noaltmacro", s_altmacro
, 0},
378 {"noformat", s_ignore
, 0},
379 {"nolist", listing_list
, 0}, /* Turn listing off. */
380 {"nopage", listing_nopage
, 0},
382 {"offset", s_struct
, 0},
384 {"p2align", s_align_ptwo
, 0},
385 {"p2alignw", s_align_ptwo
, -2},
386 {"p2alignl", s_align_ptwo
, -4},
387 {"page", listing_eject
, 0},
388 {"plen", listing_psize
, 0},
389 {"print", s_print
, 0},
390 {"psize", listing_psize
, 0}, /* Set paper size. */
391 {"purgem", s_purgem
, 0},
396 {"sbttl", listing_title
, 1}, /* Subtitle of listing. */
401 {"single", float_cons
, 'f'},
403 {"space", s_space
, 0},
404 {"skip", s_space
, 0},
405 {"sleb128", s_leb128
, 1},
406 {"spc", s_ignore
, 0},
407 {"stabd", s_stab
, 'd'},
408 {"stabn", s_stab
, 'n'},
409 {"stabs", s_stab
, 's'},
410 {"string", stringer
, 1},
411 {"struct", s_struct
, 0},
415 /* This is for gcc to use. It's only just been added (2/94), so gcc
416 won't be able to use it for a while -- probably a year or more.
417 But once this has been released, check with gcc maintainers
418 before deleting it or even changing the spelling. */
419 {"this_GCC_requires_the_GNU_assembler", s_ignore
, 0},
420 /* If we're folding case -- done for some targets, not necessarily
421 all -- the above string in an input file will be converted to
422 this one. Match it either way... */
423 {"this_gcc_requires_the_gnu_assembler", s_ignore
, 0},
425 {"title", listing_title
, 0}, /* Listing title. */
426 {"ttl", listing_title
, 0},
428 {"uleb128", s_leb128
, 0},
432 {"xdef", s_globl
, 0},
433 {"xref", s_ignore
, 0},
434 {"xstabs", s_xstab
, 's'},
435 {"warning", s_errwarn
, 0},
437 {"zero", s_space
, 0},
438 {NULL
, NULL
, 0} /* End sentinel. */
441 static int pop_override_ok
= 0;
442 static const char *pop_table_name
;
445 pop_insert (const pseudo_typeS
*table
)
448 const pseudo_typeS
*pop
;
449 for (pop
= table
; pop
->poc_name
; pop
++)
451 errtxt
= hash_insert (po_hash
, pop
->poc_name
, (char *) pop
);
452 if (errtxt
&& (!pop_override_ok
|| strcmp (errtxt
, "exists")))
453 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name
,
458 #ifndef md_pop_insert
459 #define md_pop_insert() pop_insert(md_pseudo_table)
462 #ifndef obj_pop_insert
463 #define obj_pop_insert() pop_insert(obj_pseudo_table)
466 #ifndef cfi_pop_insert
467 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
473 po_hash
= hash_new ();
475 /* Do the target-specific pseudo ops. */
476 pop_table_name
= "md";
479 /* Now object specific. Skip any that were in the target table. */
480 pop_table_name
= "obj";
484 /* Now portable ones. Skip any that we've seen already. */
485 pop_table_name
= "standard";
486 pop_insert (potable
);
488 #ifdef TARGET_USE_CFIPOP
489 pop_table_name
= "cfi";
495 #define HANDLE_CONDITIONAL_ASSEMBLY() \
496 if (ignore_input ()) \
498 while (!is_end_of_line[(unsigned char) *input_line_pointer++]) \
499 if (input_line_pointer == buffer_limit) \
504 /* This function is used when scrubbing the characters between #APP
507 static char *scrub_string
;
508 static char *scrub_string_end
;
511 scrub_from_string (char *buf
, int buflen
)
515 copy
= scrub_string_end
- scrub_string
;
518 memcpy (buf
, scrub_string
, copy
);
519 scrub_string
+= copy
;
523 /* Helper function of read_a_source_file, which tries to expand a macro. */
525 try_macro (char term
, const char *line
)
531 if (check_macro (line
, &out
, &err
, ¯o
))
535 *input_line_pointer
++ = term
;
536 input_scrub_include_sb (&out
,
537 input_line_pointer
, 1);
540 input_scrub_next_buffer (&input_line_pointer
);
542 md_macro_info (macro
);
549 /* We read the file, putting things into a web that represents what we
550 have been reading. */
552 read_a_source_file (char *name
)
555 register char *s
; /* String of symbol, '\0' appended. */
563 buffer
= input_scrub_new_file (name
);
566 listing_newline (NULL
);
567 register_dependency (name
);
569 /* Generate debugging information before we've read anything in to denote
570 this file as the "main" source file and not a subordinate one
571 (e.g. N_SO vs N_SOL in stabs). */
572 generate_file_debug ();
574 while ((buffer_limit
= input_scrub_next_buffer (&input_line_pointer
)) != 0)
575 { /* We have another line to parse. */
577 /* In order to avoid listing macro expansion lines with labels
578 multiple times, keep track of which line was last issued. */
579 static char *last_eol
;
583 know (buffer_limit
[-1] == '\n'); /* Must have a sentinel. */
585 while (input_line_pointer
< buffer_limit
)
587 /* We have more of this buffer to parse. */
589 /* We now have input_line_pointer->1st char of next line.
590 If input_line_pointer [-1] == '\n' then we just
591 scanned another line: so bump line counters. */
592 if (is_end_of_line
[(unsigned char) input_line_pointer
[-1]])
594 #ifdef md_start_line_hook
595 md_start_line_hook ();
597 if (input_line_pointer
[-1] == '\n')
598 bump_line_counters ();
602 if (LABELS_WITHOUT_COLONS
|| flag_m68k_mri
)
604 /* Text at the start of a line must be a label, we
605 run down and stick a colon in. */
606 if (is_name_beginner (*input_line_pointer
))
608 char *line_start
= input_line_pointer
;
613 HANDLE_CONDITIONAL_ASSEMBLY ();
615 c
= get_symbol_end ();
617 /* In MRI mode, the EQU and MACRO pseudoops must
618 be handled specially. */
622 char *rest
= input_line_pointer
+ 1;
626 if (*rest
== ' ' || *rest
== '\t')
628 if ((strncasecmp (rest
, "EQU", 3) == 0
629 || strncasecmp (rest
, "SET", 3) == 0)
630 && (rest
[3] == ' ' || rest
[3] == '\t'))
632 input_line_pointer
= rest
+ 3;
634 strncasecmp (rest
, "SET", 3) == 0);
637 if (strncasecmp (rest
, "MACRO", 5) == 0
640 || is_end_of_line
[(unsigned char) rest
[5]]))
644 /* In MRI mode, we need to handle the MACRO
645 pseudo-op specially: we don't want to put the
646 symbol in the symbol table. */
648 #ifdef TC_START_LABEL_WITHOUT_COLON
649 && TC_START_LABEL_WITHOUT_COLON(c
,
653 line_label
= colon (line_start
);
655 line_label
= symbol_create (line_start
,
660 *input_line_pointer
= c
;
662 input_line_pointer
++;
667 /* We are at the beginning of a line, or similar place.
668 We expect a well-formed assembler statement.
669 A "symbol-name:" is a statement.
671 Depending on what compiler is used, the order of these tests
672 may vary to catch most common case 1st.
673 Each test is independent of all other tests at the (top) level.
674 PLEASE make a compiler that doesn't use this assembler.
675 It is crufty to waste a compiler's time encoding things for this
676 assembler, which then wastes more time decoding it.
677 (And communicating via (linear) files is silly!
678 If you must pass stuff, please pass a tree!) */
679 if ((c
= *input_line_pointer
++) == '\t'
683 c
= *input_line_pointer
++;
685 know (c
!= ' '); /* No further leading whitespace. */
688 /* If listing is on, and we are expanding a macro, then give
689 the listing code the contents of the expanded line. */
692 if ((listing
& LISTING_MACEXP
) && macro_nest
> 0)
697 /* Find the end of the current expanded macro line. */
698 for (s
= input_line_pointer
- 1; *s
; ++s
)
699 if (is_end_of_line
[(unsigned char) *s
])
705 /* Copy it for safe keeping. Also give an indication of
706 how much macro nesting is involved at this point. */
707 len
= s
- (input_line_pointer
- 1);
708 copy
= (char *) xmalloc (len
+ macro_nest
+ 2);
709 memset (copy
, '>', macro_nest
);
710 copy
[macro_nest
] = ' ';
711 memcpy (copy
+ macro_nest
+ 1, input_line_pointer
- 1, len
);
712 copy
[macro_nest
+ 1 + len
] = '\0';
714 /* Install the line with the listing facility. */
715 listing_newline (copy
);
719 listing_newline (NULL
);
722 /* C is the 1st significant character.
723 Input_line_pointer points after that character. */
724 if (is_name_beginner (c
))
726 /* Want user-defined label or pseudo/opcode. */
727 HANDLE_CONDITIONAL_ASSEMBLY ();
729 s
= --input_line_pointer
;
730 c
= get_symbol_end (); /* name's delimiter. */
732 /* C is character after symbol.
733 That character's place in the input line is now '\0'.
734 S points to the beginning of the symbol.
735 [In case of pseudo-op, s->'.'.]
736 Input_line_pointer->'\0' where c was. */
737 if (TC_START_LABEL (c
, input_line_pointer
))
741 char *rest
= input_line_pointer
+ 1;
743 /* In MRI mode, \tsym: set 0 is permitted. */
747 if (*rest
== ' ' || *rest
== '\t')
750 if ((strncasecmp (rest
, "EQU", 3) == 0
751 || strncasecmp (rest
, "SET", 3) == 0)
752 && (rest
[3] == ' ' || rest
[3] == '\t'))
754 input_line_pointer
= rest
+ 3;
760 line_label
= colon (s
); /* User-defined label. */
761 /* Put ':' back for error messages' sake. */
762 *input_line_pointer
++ = ':';
763 #ifdef tc_check_label
764 tc_check_label (line_label
);
766 /* Input_line_pointer->after ':'. */
770 || ((c
== ' ' || c
== '\t')
771 && input_line_pointer
[1] == '='))
772 #ifdef TC_EQUAL_IN_INSN
773 && !TC_EQUAL_IN_INSN (c
, s
)
778 demand_empty_rest_of_line ();
782 /* Expect pseudo-op or machine instruction. */
785 #ifndef TC_CASE_SENSITIVE
789 strncpy (original_case_string
, s2
, sizeof (original_case_string
));
790 original_case_string
[sizeof (original_case_string
) - 1] = 0;
799 if (NO_PSEUDO_DOT
|| flag_m68k_mri
)
801 /* The MRI assembler and the m88k use pseudo-ops
803 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
);
804 if (pop
!= NULL
&& pop
->poc_handler
== NULL
)
809 || (!flag_m68k_mri
&& *s
== '.'))
813 WARNING: c has next char, which may be end-of-line.
814 We lookup the pseudo-op table with s+1 because we
815 already know that the pseudo-op begins with a '.'. */
818 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
+ 1);
819 if (pop
&& !pop
->poc_handler
)
822 /* In MRI mode, we may need to insert an
823 automatic alignment directive. What a hack
825 if (mri_pending_align
827 || !((pop
->poc_handler
== cons
828 && pop
->poc_val
== 1)
829 || (pop
->poc_handler
== s_space
830 && pop
->poc_val
== 1)
831 #ifdef tc_conditional_pseudoop
832 || tc_conditional_pseudoop (pop
)
834 || pop
->poc_handler
== s_if
835 || pop
->poc_handler
== s_ifdef
836 || pop
->poc_handler
== s_ifc
837 || pop
->poc_handler
== s_ifeqs
838 || pop
->poc_handler
== s_else
839 || pop
->poc_handler
== s_endif
840 || pop
->poc_handler
== s_globl
841 || pop
->poc_handler
== s_ignore
)))
843 do_align (1, (char *) NULL
, 0, 0);
844 mri_pending_align
= 0;
846 if (line_label
!= NULL
)
848 symbol_set_frag (line_label
, frag_now
);
849 S_SET_VALUE (line_label
, frag_now_fix ());
853 /* Print the error msg now, while we still can. */
856 char *end
= input_line_pointer
;
858 *input_line_pointer
= c
;
860 c
= *--input_line_pointer
;
861 *input_line_pointer
= '\0';
862 if (! macro_defined
|| ! try_macro (c
, s
))
865 as_bad (_("unknown pseudo-op: `%s'"), s
);
866 *input_line_pointer
++ = c
;
871 /* Put it back for error messages etc. */
872 *input_line_pointer
= c
;
873 /* The following skip of whitespace is compulsory.
874 A well shaped space is sometimes all that separates
875 keyword from operands. */
876 if (c
== ' ' || c
== '\t')
877 input_line_pointer
++;
879 /* Input_line is restored.
880 Input_line_pointer->1st non-blank char
881 after pseudo-operation. */
882 (*pop
->poc_handler
) (pop
->poc_val
);
884 /* If that was .end, just get out now. */
885 if (pop
->poc_handler
== s_end
)
891 #ifdef QUOTES_IN_INSN
895 /* WARNING: c has char, which may be end-of-line. */
896 /* Also: input_line_pointer->`\0` where c was. */
897 *input_line_pointer
= c
;
898 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
900 #ifdef TC_EOL_IN_INSN
901 || TC_EOL_IN_INSN (input_line_pointer
)
905 if (flag_m68k_mri
&& *input_line_pointer
== '\'')
907 #ifdef QUOTES_IN_INSN
910 else if (*input_line_pointer
== '"')
912 else if (*input_line_pointer
== '\\')
915 input_line_pointer
++;
918 c
= *input_line_pointer
;
919 *input_line_pointer
= '\0';
921 generate_lineno_debug ();
923 if (macro_defined
&& try_macro (c
, s
))
926 if (mri_pending_align
)
928 do_align (1, (char *) NULL
, 0, 0);
929 mri_pending_align
= 0;
930 if (line_label
!= NULL
)
932 symbol_set_frag (line_label
, frag_now
);
933 S_SET_VALUE (line_label
, frag_now_fix ());
937 md_assemble (s
); /* Assemble 1 instruction. */
939 *input_line_pointer
++ = c
;
941 /* We resume loop AFTER the end-of-line from
948 /* Empty statement? */
949 if (is_end_of_line
[(unsigned char) c
])
952 if ((LOCAL_LABELS_DOLLAR
|| LOCAL_LABELS_FB
) && ISDIGIT (c
))
954 /* local label ("4:") */
955 char *backup
= input_line_pointer
;
957 HANDLE_CONDITIONAL_ASSEMBLY ();
961 /* Read the whole number. */
962 while (ISDIGIT (*input_line_pointer
))
964 temp
= (temp
* 10) + *input_line_pointer
- '0';
965 ++input_line_pointer
;
968 if (LOCAL_LABELS_DOLLAR
969 && *input_line_pointer
== '$'
970 && *(input_line_pointer
+ 1) == ':')
972 input_line_pointer
+= 2;
974 if (dollar_label_defined (temp
))
976 as_fatal (_("label \"%d$\" redefined"), temp
);
979 define_dollar_label (temp
);
980 colon (dollar_label_name (temp
, 0));
985 && *input_line_pointer
++ == ':')
987 fb_label_instance_inc (temp
);
988 colon (fb_label_name (temp
, 0));
992 input_line_pointer
= backup
;
993 } /* local label ("4:") */
995 if (c
&& strchr (line_comment_chars
, c
))
996 { /* Its a comment. Better say APP or NO_APP. */
1001 unsigned int new_length
;
1004 bump_line_counters ();
1005 s
= input_line_pointer
;
1006 if (strncmp (s
, "APP\n", 4))
1007 continue; /* We ignore it */
1011 ends
= strstr (s
, "#NO_APP\n");
1015 unsigned int tmp_len
;
1018 /* The end of the #APP wasn't in this buffer. We
1019 keep reading in buffers until we find the #NO_APP
1020 that goes with this #APP There is one. The specs
1022 tmp_len
= buffer_limit
- s
;
1023 tmp_buf
= xmalloc (tmp_len
+ 1);
1024 memcpy (tmp_buf
, s
, tmp_len
);
1027 new_tmp
= input_scrub_next_buffer (&buffer
);
1031 buffer_limit
= new_tmp
;
1032 input_line_pointer
= buffer
;
1033 ends
= strstr (buffer
, "#NO_APP\n");
1035 num
= ends
- buffer
;
1037 num
= buffer_limit
- buffer
;
1039 tmp_buf
= xrealloc (tmp_buf
, tmp_len
+ num
);
1040 memcpy (tmp_buf
+ tmp_len
, buffer
, num
);
1045 input_line_pointer
= ends
? ends
+ 8 : NULL
;
1053 input_line_pointer
= ends
+ 8;
1057 scrub_string_end
= ends
;
1059 new_length
= ends
- s
;
1060 new_buf
= (char *) xmalloc (new_length
);
1067 space
= (new_buf
+ new_length
) - new_tmp
;
1068 size
= do_scrub_chars (scrub_from_string
, new_tmp
, space
);
1076 new_buf
= xrealloc (new_buf
, new_length
+ 100);
1077 new_tmp
= new_buf
+ new_length
;
1084 /* We've "scrubbed" input to the preferred format. In the
1085 process we may have consumed the whole of the remaining
1086 file (and included files). We handle this formatted
1087 input similar to that of macro expansion, letting
1088 actual macro expansion (possibly nested) and other
1089 input expansion work. Beware that in messages, line
1090 numbers and possibly file names will be incorrect. */
1091 sb_add_string (&sbuf
, new_buf
);
1092 input_scrub_include_sb (&sbuf
, input_line_pointer
, 0);
1094 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1099 HANDLE_CONDITIONAL_ASSEMBLY ();
1101 #ifdef tc_unrecognized_line
1102 if (tc_unrecognized_line (c
))
1105 input_line_pointer
--;
1106 /* Report unknown char as ignored. */
1107 demand_empty_rest_of_line ();
1110 #ifdef md_after_pass_hook
1111 md_after_pass_hook ();
1120 /* Close the input file. */
1121 input_scrub_close ();
1122 #ifdef WARN_COMMENTS
1124 if (warn_comment
&& found_comment
)
1125 as_warn_where (found_comment_file
, found_comment
,
1126 "first comment found here");
1131 /* Convert O_constant expression EXP into the equivalent O_big representation.
1132 Take the sign of the number from X_unsigned rather than X_add_number. */
1135 convert_to_bignum (expressionS
*exp
)
1140 value
= exp
->X_add_number
;
1141 for (i
= 0; i
< sizeof (exp
->X_add_number
) / CHARS_PER_LITTLENUM
; i
++)
1143 generic_bignum
[i
] = value
& LITTLENUM_MASK
;
1144 value
>>= LITTLENUM_NUMBER_OF_BITS
;
1146 /* Add a sequence of sign bits if the top bit of X_add_number is not
1147 the sign of the original value. */
1148 if ((exp
->X_add_number
< 0) != !exp
->X_unsigned
)
1149 generic_bignum
[i
++] = exp
->X_unsigned
? 0 : LITTLENUM_MASK
;
1151 exp
->X_add_number
= i
;
1154 /* For most MRI pseudo-ops, the line actually ends at the first
1155 nonquoted space. This function looks for that point, stuffs a null
1156 in, and sets *STOPCP to the character that used to be there, and
1157 returns the location.
1159 Until I hear otherwise, I am going to assume that this is only true
1160 for the m68k MRI assembler. */
1163 mri_comment_field (char *stopcp
)
1169 know (flag_m68k_mri
);
1171 for (s
= input_line_pointer
;
1172 ((!is_end_of_line
[(unsigned char) *s
] && *s
!= ' ' && *s
!= '\t')
1180 for (s
= input_line_pointer
;
1181 !is_end_of_line
[(unsigned char) *s
];
1191 /* Skip to the end of an MRI comment field. */
1194 mri_comment_end (char *stop
, int stopc
)
1198 input_line_pointer
= stop
;
1200 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1201 ++input_line_pointer
;
1205 s_abort (int ignore ATTRIBUTE_UNUSED
)
1207 as_fatal (_(".abort detected. Abandoning ship."));
1210 /* Guts of .align directive. N is the power of two to which to align.
1211 FILL may be NULL, or it may point to the bytes of the fill pattern.
1212 LEN is the length of whatever FILL points to, if anything. MAX is
1213 the maximum number of characters to skip when doing the alignment,
1214 or 0 if there is no maximum. */
1217 do_align (int n
, char *fill
, int len
, int max
)
1219 if (now_seg
== absolute_section
)
1223 if (*fill
++ != '\0')
1225 as_warn (_("ignoring fill value in absolute section"));
1232 #ifdef md_flush_pending_output
1233 md_flush_pending_output ();
1236 md_do_align (n
, fill
, len
, max
, just_record_alignment
);
1239 /* Only make a frag if we HAVE to... */
1240 if (n
!= 0 && !need_pass_2
)
1244 if (subseg_text_p (now_seg
))
1245 frag_align_code (n
, max
);
1247 frag_align (n
, 0, max
);
1250 frag_align (n
, *fill
, max
);
1252 frag_align_pattern (n
, fill
, len
, max
);
1256 just_record_alignment
: ATTRIBUTE_UNUSED_LABEL
1259 record_alignment (now_seg
, n
- OCTETS_PER_BYTE_POWER
);
1262 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1263 (in bytes). A negative ARG is the negative of the length of the
1264 fill pattern. BYTES_P is non-zero if the alignment value should be
1265 interpreted as the byte boundary, rather than the power of 2. */
1267 #ifdef BFD_ASSEMBLER
1268 #define ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1270 #define ALIGN_LIMIT 15
1274 s_align (int arg
, int bytes_p
)
1276 unsigned int align_limit
= ALIGN_LIMIT
;
1285 stop
= mri_comment_field (&stopc
);
1287 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1292 align
= arg
; /* Default value from pseudo-op table. */
1296 align
= get_absolute_expression ();
1302 /* Convert to a power of 2. */
1307 for (i
= 0; (align
& 1) == 0; align
>>= 1, ++i
)
1310 as_bad (_("alignment not a power of 2"));
1316 if (align
> align_limit
)
1318 align
= align_limit
;
1319 as_warn (_("alignment too large: %u assumed"), align
);
1322 if (*input_line_pointer
!= ',')
1329 ++input_line_pointer
;
1330 if (*input_line_pointer
== ',')
1334 fill
= get_absolute_expression ();
1339 if (*input_line_pointer
!= ',')
1343 ++input_line_pointer
;
1344 max
= get_absolute_expression ();
1351 as_warn (_("expected fill pattern missing"));
1352 do_align (align
, (char *) NULL
, 0, max
);
1367 do_align (align
, &fill_char
, fill_len
, max
);
1373 if ((size_t) fill_len
> sizeof ab
)
1375 md_number_to_chars (ab
, fill
, fill_len
);
1376 do_align (align
, ab
, fill_len
, max
);
1380 demand_empty_rest_of_line ();
1383 mri_comment_end (stop
, stopc
);
1386 /* Handle the .align pseudo-op on machines where ".align 4" means
1387 align to a 4 byte boundary. */
1390 s_align_bytes (int arg
)
1395 /* Handle the .align pseudo-op on machines where ".align 4" means align
1396 to a 2**4 boundary. */
1399 s_align_ptwo (int arg
)
1404 /* Switch in and out of alternate macro mode. */
1409 demand_empty_rest_of_line ();
1410 macro_set_alternate (on
);
1414 s_comm_internal (int param
,
1415 symbolS
*(*comm_parse_extra
) (int, symbolS
*, addressT
))
1421 symbolS
*symbolP
= NULL
;
1427 stop
= mri_comment_field (&stopc
);
1429 name
= input_line_pointer
;
1430 c
= get_symbol_end ();
1431 /* Just after name is now '\0'. */
1432 p
= input_line_pointer
;
1437 as_bad (_("expected symbol name"));
1438 discard_rest_of_line ();
1444 /* Accept an optional comma after the name. The comma used to be
1445 required, but Irix 5 cc does not generate it for .lcomm. */
1446 if (*input_line_pointer
== ',')
1447 input_line_pointer
++;
1449 temp
= get_absolute_expr (&exp
);
1451 #ifdef BFD_ASSEMBLER
1452 size
&= ((offsetT
) 2 << (stdoutput
->arch_info
->bits_per_address
- 1)) - 1;
1454 if (exp
.X_op
== O_absent
)
1456 as_bad (_("missing size expression"));
1457 ignore_rest_of_line ();
1460 else if (temp
!= size
|| !exp
.X_unsigned
)
1462 as_warn (_("size (%ld) out of range, ignored"), (long) temp
);
1463 ignore_rest_of_line ();
1468 symbolP
= symbol_find_or_make (name
);
1469 if (S_IS_DEFINED (symbolP
) && !S_IS_COMMON (symbolP
))
1472 as_bad (_("symbol `%s' is already defined"), name
);
1474 ignore_rest_of_line ();
1478 size
= S_GET_VALUE (symbolP
);
1481 else if (size
!= temp
)
1482 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1483 name
, (long) size
, (long) temp
);
1486 if (comm_parse_extra
!= NULL
)
1487 symbolP
= (*comm_parse_extra
) (param
, symbolP
, size
);
1490 S_SET_VALUE (symbolP
, (valueT
) size
);
1491 S_SET_EXTERNAL (symbolP
);
1494 extern int flag_one
;
1495 if (size
== 0 || !flag_one
)
1496 S_GET_OTHER (symbolP
) = const_flag
;
1501 demand_empty_rest_of_line ();
1504 mri_comment_end (stop
, stopc
);
1511 s_comm_internal (ignore
, NULL
);
1514 /* The MRI COMMON pseudo-op. We handle this by creating a common
1515 symbol with the appropriate name. We make s_space do the right
1516 thing by increasing the size. */
1519 s_mri_common (int small ATTRIBUTE_UNUSED
)
1535 stop
= mri_comment_field (&stopc
);
1539 name
= input_line_pointer
;
1540 if (!ISDIGIT (*name
))
1541 c
= get_symbol_end ();
1546 ++input_line_pointer
;
1548 while (ISDIGIT (*input_line_pointer
));
1550 c
= *input_line_pointer
;
1551 *input_line_pointer
= '\0';
1553 if (line_label
!= NULL
)
1555 alc
= (char *) xmalloc (strlen (S_GET_NAME (line_label
))
1556 + (input_line_pointer
- name
)
1558 sprintf (alc
, "%s%s", name
, S_GET_NAME (line_label
));
1563 sym
= symbol_find_or_make (name
);
1564 *input_line_pointer
= c
;
1568 if (*input_line_pointer
!= ',')
1572 ++input_line_pointer
;
1573 align
= get_absolute_expression ();
1576 if (S_IS_DEFINED (sym
) && !S_IS_COMMON (sym
))
1578 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym
));
1579 ignore_rest_of_line ();
1580 mri_comment_end (stop
, stopc
);
1584 S_SET_EXTERNAL (sym
);
1585 mri_common_symbol
= sym
;
1589 S_SET_ALIGN (sym
, align
);
1592 if (line_label
!= NULL
)
1595 exp
.X_op
= O_symbol
;
1596 exp
.X_add_symbol
= sym
;
1597 exp
.X_add_number
= 0;
1598 symbol_set_value_expression (line_label
, &exp
);
1599 symbol_set_frag (line_label
, &zero_address_frag
);
1600 S_SET_SEGMENT (line_label
, expr_section
);
1603 /* FIXME: We just ignore the small argument, which distinguishes
1604 COMMON and COMMON.S. I don't know what we can do about it. */
1606 /* Ignore the type and hptype. */
1607 if (*input_line_pointer
== ',')
1608 input_line_pointer
+= 2;
1609 if (*input_line_pointer
== ',')
1610 input_line_pointer
+= 2;
1612 demand_empty_rest_of_line ();
1614 mri_comment_end (stop
, stopc
);
1618 s_data (int ignore ATTRIBUTE_UNUSED
)
1623 temp
= get_absolute_expression ();
1624 if (flag_readonly_data_in_text
)
1626 section
= text_section
;
1630 section
= data_section
;
1632 subseg_set (section
, (subsegT
) temp
);
1637 demand_empty_rest_of_line ();
1640 /* Handle the .appfile pseudo-op. This is automatically generated by
1641 do_scrub_chars when a preprocessor # line comment is seen with a
1642 file name. This default definition may be overridden by the object
1643 or CPU specific pseudo-ops. This function is also the default
1644 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1648 s_app_file_string (char *file
, int appfile ATTRIBUTE_UNUSED
)
1652 listing_source_file (file
);
1654 register_dependency (file
);
1656 obj_app_file (file
, appfile
);
1661 s_app_file (int appfile
)
1666 /* Some assemblers tolerate immediately following '"'. */
1667 if ((s
= demand_copy_string (&length
)) != 0)
1669 /* If this is a fake .appfile, a fake newline was inserted into
1670 the buffer. Passing -2 to new_logical_line tells it to
1673 = (!new_logical_line (s
, appfile
? -2 : -1) && appfile
);
1675 /* In MRI mode, the preprocessor may have inserted an extraneous
1678 && *input_line_pointer
== '\''
1679 && is_end_of_line
[(unsigned char) input_line_pointer
[1]])
1680 ++input_line_pointer
;
1682 demand_empty_rest_of_line ();
1684 s_app_file_string (s
, appfile
);
1688 /* Handle the .appline pseudo-op. This is automatically generated by
1689 do_scrub_chars when a preprocessor # line comment is seen. This
1690 default definition may be overridden by the object or CPU specific
1694 s_app_line (int ignore ATTRIBUTE_UNUSED
)
1698 /* The given number is that of the next line. */
1699 l
= get_absolute_expression () - 1;
1701 /* Some of the back ends can't deal with non-positive line numbers.
1702 Besides, it's silly. */
1703 as_warn (_("line numbers must be positive; line number %d rejected"),
1707 new_logical_line ((char *) NULL
, l
);
1710 listing_source_line (l
);
1713 demand_empty_rest_of_line ();
1716 /* Handle the .end pseudo-op. Actually, the real work is done in
1717 read_a_source_file. */
1720 s_end (int ignore ATTRIBUTE_UNUSED
)
1724 /* The MRI assembler permits the start symbol to follow .end,
1725 but we don't support that. */
1727 if (!is_end_of_line
[(unsigned char) *input_line_pointer
]
1728 && *input_line_pointer
!= '*'
1729 && *input_line_pointer
!= '!')
1730 as_warn (_("start address not supported"));
1734 /* Handle the .err pseudo-op. */
1737 s_err (int ignore ATTRIBUTE_UNUSED
)
1739 as_bad (_(".err encountered"));
1740 demand_empty_rest_of_line ();
1743 /* Handle the .error and .warning pseudo-ops. */
1749 /* The purpose for the conditional assignment is not to
1750 internationalize the directive itself, but that we need a
1751 self-contained message, one that can be passed like the
1752 demand_copy_C_string return value, and with no assumption on the
1753 location of the name of the directive within the message. */
1755 = (err
? _(".error directive invoked in source file")
1756 : _(".warning directive invoked in source file"));
1758 if (!is_it_end_of_statement ())
1760 if (*input_line_pointer
!= '\"')
1762 as_bad (_("%s argument must be a string"),
1763 err
? ".error" : ".warning");
1764 discard_rest_of_line ();
1768 msg
= demand_copy_C_string (&len
);
1776 as_warn ("%s", msg
);
1777 demand_empty_rest_of_line ();
1780 /* Handle the MRI fail pseudo-op. */
1783 s_fail (int ignore ATTRIBUTE_UNUSED
)
1790 stop
= mri_comment_field (&stopc
);
1792 temp
= get_absolute_expression ();
1794 as_warn (_(".fail %ld encountered"), (long) temp
);
1796 as_bad (_(".fail %ld encountered"), (long) temp
);
1798 demand_empty_rest_of_line ();
1801 mri_comment_end (stop
, stopc
);
1805 s_fill (int ignore ATTRIBUTE_UNUSED
)
1807 expressionS rep_exp
;
1809 register long fill
= 0;
1812 #ifdef md_flush_pending_output
1813 md_flush_pending_output ();
1816 get_known_segmented_expression (&rep_exp
);
1817 if (*input_line_pointer
== ',')
1819 input_line_pointer
++;
1820 size
= get_absolute_expression ();
1821 if (*input_line_pointer
== ',')
1823 input_line_pointer
++;
1824 fill
= get_absolute_expression ();
1828 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1829 #define BSD_FILL_SIZE_CROCK_8 (8)
1830 if (size
> BSD_FILL_SIZE_CROCK_8
)
1832 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8
);
1833 size
= BSD_FILL_SIZE_CROCK_8
;
1837 as_warn (_("size negative; .fill ignored"));
1840 else if (rep_exp
.X_op
== O_constant
&& rep_exp
.X_add_number
<= 0)
1842 if (rep_exp
.X_add_number
< 0)
1843 as_warn (_("repeat < 0; .fill ignored"));
1847 if (size
&& !need_pass_2
)
1849 if (rep_exp
.X_op
== O_constant
)
1851 p
= frag_var (rs_fill
, (int) size
, (int) size
,
1852 (relax_substateT
) 0, (symbolS
*) 0,
1853 (offsetT
) rep_exp
.X_add_number
,
1858 /* We don't have a constant repeat count, so we can't use
1859 rs_fill. We can get the same results out of rs_space,
1860 but its argument is in bytes, so we must multiply the
1861 repeat count by size. */
1864 rep_sym
= make_expr_symbol (&rep_exp
);
1867 expressionS size_exp
;
1868 size_exp
.X_op
= O_constant
;
1869 size_exp
.X_add_number
= size
;
1871 rep_exp
.X_op
= O_multiply
;
1872 rep_exp
.X_add_symbol
= rep_sym
;
1873 rep_exp
.X_op_symbol
= make_expr_symbol (&size_exp
);
1874 rep_exp
.X_add_number
= 0;
1875 rep_sym
= make_expr_symbol (&rep_exp
);
1878 p
= frag_var (rs_space
, (int) size
, (int) size
,
1879 (relax_substateT
) 0, rep_sym
, (offsetT
) 0, (char *) 0);
1882 memset (p
, 0, (unsigned int) size
);
1884 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1885 flavoured AS. The following bizarre behaviour is to be
1886 compatible with above. I guess they tried to take up to 8
1887 bytes from a 4-byte expression and they forgot to sign
1889 #define BSD_FILL_SIZE_CROCK_4 (4)
1890 md_number_to_chars (p
, (valueT
) fill
,
1891 (size
> BSD_FILL_SIZE_CROCK_4
1892 ? BSD_FILL_SIZE_CROCK_4
1894 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1895 but emits no error message because it seems a legal thing to do.
1896 It is a degenerate case of .fill but could be emitted by a
1899 demand_empty_rest_of_line ();
1903 s_globl (int ignore ATTRIBUTE_UNUSED
)
1912 stop
= mri_comment_field (&stopc
);
1916 name
= input_line_pointer
;
1917 c
= get_symbol_end ();
1918 symbolP
= symbol_find_or_make (name
);
1919 S_SET_EXTERNAL (symbolP
);
1921 *input_line_pointer
= c
;
1923 c
= *input_line_pointer
;
1926 input_line_pointer
++;
1928 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1934 demand_empty_rest_of_line ();
1937 mri_comment_end (stop
, stopc
);
1940 /* Handle the MRI IRP and IRPC pseudo-ops. */
1951 as_where (&file
, &line
);
1954 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1955 sb_add_char (&s
, *input_line_pointer
++);
1959 err
= expand_irp (irpc
, 0, &s
, &out
, get_line_sb
);
1961 as_bad_where (file
, line
, "%s", err
);
1965 input_scrub_include_sb (&out
, input_line_pointer
, 1);
1967 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1970 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
1971 the section to only be linked once. However, this is not supported
1972 by most object file formats. This takes an optional argument,
1973 which is what to do about duplicates. */
1976 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
1978 enum linkonce_type type
;
1982 type
= LINKONCE_DISCARD
;
1984 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1989 s
= input_line_pointer
;
1990 c
= get_symbol_end ();
1991 if (strcasecmp (s
, "discard") == 0)
1992 type
= LINKONCE_DISCARD
;
1993 else if (strcasecmp (s
, "one_only") == 0)
1994 type
= LINKONCE_ONE_ONLY
;
1995 else if (strcasecmp (s
, "same_size") == 0)
1996 type
= LINKONCE_SAME_SIZE
;
1997 else if (strcasecmp (s
, "same_contents") == 0)
1998 type
= LINKONCE_SAME_CONTENTS
;
2000 as_warn (_("unrecognized .linkonce type `%s'"), s
);
2002 *input_line_pointer
= c
;
2005 #ifdef obj_handle_link_once
2006 obj_handle_link_once (type
);
2007 #else /* ! defined (obj_handle_link_once) */
2008 #ifdef BFD_ASSEMBLER
2012 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
2013 as_warn (_(".linkonce is not supported for this object file format"));
2015 flags
= bfd_get_section_flags (stdoutput
, now_seg
);
2016 flags
|= SEC_LINK_ONCE
;
2021 case LINKONCE_DISCARD
:
2022 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
2024 case LINKONCE_ONE_ONLY
:
2025 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
2027 case LINKONCE_SAME_SIZE
:
2028 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
2030 case LINKONCE_SAME_CONTENTS
:
2031 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
2034 if (!bfd_set_section_flags (stdoutput
, now_seg
, flags
))
2035 as_bad (_("bfd_set_section_flags: %s"),
2036 bfd_errmsg (bfd_get_error ()));
2038 #else /* ! defined (BFD_ASSEMBLER) */
2039 as_warn (_(".linkonce is not supported for this object file format"));
2040 #endif /* ! defined (BFD_ASSEMBLER) */
2041 #endif /* ! defined (obj_handle_link_once) */
2043 demand_empty_rest_of_line ();
2047 bss_alloc (symbolS
*symbolP
, addressT size
, int align
)
2050 segT current_seg
= now_seg
;
2051 subsegT current_subseg
= now_subseg
;
2052 segT bss_seg
= bss_section
;
2054 #if defined (TC_MIPS) || defined (TC_ALPHA)
2055 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
2056 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
2058 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2059 if (size
<= bfd_get_gp_size (stdoutput
))
2061 bss_seg
= subseg_new (".sbss", 1);
2062 seg_info (bss_seg
)->bss
= 1;
2063 #ifdef BFD_ASSEMBLER
2064 if (!bfd_set_section_flags (stdoutput
, bss_seg
, SEC_ALLOC
))
2065 as_warn (_("error setting flags for \".sbss\": %s"),
2066 bfd_errmsg (bfd_get_error ()));
2071 subseg_set (bss_seg
, 1);
2075 record_alignment (bss_seg
, align
);
2076 frag_align (align
, 0, 0);
2079 /* Detach from old frag. */
2080 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2081 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2083 symbol_set_frag (symbolP
, frag_now
);
2084 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
, NULL
);
2088 S_SET_SIZE (symbolP
, size
);
2090 S_SET_SEGMENT (symbolP
, bss_seg
);
2093 /* The symbol may already have been created with a preceding
2094 ".globl" directive -- be careful not to step on storage class
2095 in that case. Otherwise, set it to static. */
2096 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2097 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2098 #endif /* OBJ_COFF */
2100 subseg_set (current_seg
, current_subseg
);
2104 parse_align (int align_bytes
)
2110 if (*input_line_pointer
!= ',')
2113 as_bad (_("expected alignment after size"));
2114 ignore_rest_of_line ();
2118 input_line_pointer
++;
2121 align
= get_absolute_expr (&exp
);
2122 if (exp
.X_op
== O_absent
)
2125 if (!exp
.X_unsigned
)
2127 as_warn (_("alignment negative; 0 assumed"));
2131 if (align_bytes
&& align
!= 0)
2133 /* convert to a power of 2 alignment */
2134 unsigned int alignp2
= 0;
2135 while ((align
& 1) == 0)
2136 align
>>= 1, ++alignp2
;
2139 as_bad (_("alignment not a power of 2"));
2140 ignore_rest_of_line ();
2148 /* Called from s_comm_internal after symbol name and size have been
2149 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2150 1 if this was a ".bss" directive which has a 3rd argument
2151 (alignment as a power of 2), or 2 if this was a ".bss" directive
2152 with alignment in bytes. */
2155 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2161 align
= parse_align (needs_align
- 1);
2162 if (align
== (addressT
) -1)
2166 /* Assume some objects may require alignment on some systems. */
2167 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2169 bss_alloc (symbolP
, size
, align
);
2174 s_lcomm (int needs_align
)
2176 s_comm_internal (needs_align
, s_lcomm_internal
);
2180 s_lcomm_bytes (int needs_align
)
2182 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2186 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2188 register char *name
;
2192 register symbolS
*symbolP
;
2194 /* We permit ANY defined expression: BSD4.2 demands constants. */
2195 name
= input_line_pointer
;
2196 c
= get_symbol_end ();
2197 p
= input_line_pointer
;
2202 as_bad (_("expected symbol name"));
2203 discard_rest_of_line ();
2209 if (*input_line_pointer
!= ',')
2212 as_bad (_("expected comma after \"%s\""), name
);
2214 ignore_rest_of_line ();
2218 input_line_pointer
++;
2221 if (exp
.X_op
!= O_constant
2222 && exp
.X_op
!= O_register
)
2224 as_bad (_("bad expression"));
2225 ignore_rest_of_line ();
2230 symbolP
= symbol_find_or_make (name
);
2232 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
2233 symbolP->sy_desc == 0) out of this test because coff doesn't have
2234 those fields, and I can't see when they'd ever be tripped. I
2235 don't think I understand why they were here so I may have
2236 introduced a bug. As recently as 1.37 didn't have this test
2237 anyway. xoxorich. */
2239 if (S_GET_SEGMENT (symbolP
) == undefined_section
2240 && S_GET_VALUE (symbolP
) == 0)
2242 /* The name might be an undefined .global symbol; be sure to
2243 keep the "external" bit. */
2244 S_SET_SEGMENT (symbolP
,
2245 (exp
.X_op
== O_constant
2248 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2252 as_bad (_("symbol `%s' is already defined"), name
);
2256 demand_empty_rest_of_line ();
2259 /* Read a line into an sb. Returns the character that ended the line
2260 or zero if there are no more lines. */
2263 get_line_sb (sb
*line
)
2265 char quote1
, quote2
, inquote
;
2268 if (input_line_pointer
[-1] == '\n')
2269 bump_line_counters ();
2271 if (input_line_pointer
>= buffer_limit
)
2273 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2274 if (buffer_limit
== 0)
2278 /* If app.c sets any other characters to LEX_IS_STRINGQUOTE, this
2279 code needs to be changed. */
2288 #ifdef LEX_IS_STRINGQUOTE
2294 while ((c
= * input_line_pointer
++) != 0
2295 && (!is_end_of_line
[c
]
2296 || (inquote
!= '\0' && c
!= '\n')))
2300 else if (inquote
== '\0')
2304 else if (c
== quote2
)
2308 sb_add_char (line
, c
);
2311 /* Don't skip multiple end-of-line characters, because that breaks support
2312 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2313 characters but isn't. Instead just skip one end of line character and
2314 return the character skipped so that the caller can re-insert it if
2319 /* Define a macro. This is an interface to macro.c. */
2322 s_macro (int ignore ATTRIBUTE_UNUSED
)
2331 as_where (&file
, &line
);
2334 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
2335 sb_add_char (&s
, *input_line_pointer
++);
2338 if (line_label
!= NULL
)
2339 sb_add_string (&label
, S_GET_NAME (line_label
));
2341 err
= define_macro (0, &s
, &label
, get_line_sb
, file
, line
, &name
);
2343 as_bad_where (file
, line
, err
, name
);
2346 if (line_label
!= NULL
)
2348 S_SET_SEGMENT (line_label
, absolute_section
);
2349 S_SET_VALUE (line_label
, 0);
2350 symbol_set_frag (line_label
, &zero_address_frag
);
2353 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2354 && hash_find (po_hash
, name
) != NULL
)
2357 && hash_find (po_hash
, name
+ 1) != NULL
))
2358 as_warn_where (file
,
2360 _("attempt to redefine pseudo-op `%s' ignored"),
2367 /* Handle the .mexit pseudo-op, which immediately exits a macro
2371 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2373 cond_exit_macro (macro_nest
);
2374 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2377 /* Switch in and out of MRI mode. */
2380 s_mri (int ignore ATTRIBUTE_UNUSED
)
2384 on
= get_absolute_expression ();
2385 old_flag
= flag_mri
;
2403 /* Operator precedence changes in m68k MRI mode, so we need to
2404 update the operator rankings. */
2405 expr_set_precedence ();
2407 #ifdef MRI_MODE_CHANGE
2409 MRI_MODE_CHANGE (on
);
2412 demand_empty_rest_of_line ();
2415 /* Handle changing the location counter. */
2418 do_org (segT segment
, expressionS
*exp
, int fill
)
2420 if (segment
!= now_seg
&& segment
!= absolute_section
)
2421 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2423 if (now_seg
== absolute_section
)
2426 as_warn (_("ignoring fill value in absolute section"));
2427 if (exp
->X_op
!= O_constant
)
2429 as_bad (_("only constant offsets supported in absolute section"));
2430 exp
->X_add_number
= 0;
2432 abs_section_offset
= exp
->X_add_number
;
2437 symbolS
*sym
= exp
->X_add_symbol
;
2438 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2440 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2442 /* Handle complex expressions. */
2443 sym
= make_expr_symbol (exp
);
2447 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2453 s_org (int ignore ATTRIBUTE_UNUSED
)
2455 register segT segment
;
2457 register long temp_fill
;
2459 #ifdef md_flush_pending_output
2460 md_flush_pending_output ();
2463 /* The m68k MRI assembler has a different meaning for .org. It
2464 means to create an absolute section at a given address. We can't
2465 support that--use a linker script instead. */
2468 as_bad (_("MRI style ORG pseudo-op not supported"));
2469 ignore_rest_of_line ();
2473 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2474 thing as a sub-segment-relative origin. Any absolute origin is
2475 given a warning, then assumed to be segment-relative. Any
2476 segmented origin expression ("foo+42") had better be in the right
2477 segment or the .org is ignored.
2479 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2480 we never know sub-segment sizes when we are reading code. BSD
2481 will crash trying to emit negative numbers of filler bytes in
2482 certain .orgs. We don't crash, but see as-write for that code.
2484 Don't make frag if need_pass_2==1. */
2485 segment
= get_known_segmented_expression (&exp
);
2486 if (*input_line_pointer
== ',')
2488 input_line_pointer
++;
2489 temp_fill
= get_absolute_expression ();
2495 do_org (segment
, &exp
, temp_fill
);
2497 demand_empty_rest_of_line ();
2500 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2501 called by the obj-format routine which handles section changing
2502 when in MRI mode. It will create a new section, and return it. It
2503 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2504 'M' (mixed), or 'R' (romable). If BFD_ASSEMBLER is defined, the
2505 flags will be set in the section. */
2508 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2518 name
= input_line_pointer
;
2519 if (!ISDIGIT (*name
))
2520 c
= get_symbol_end ();
2525 ++input_line_pointer
;
2527 while (ISDIGIT (*input_line_pointer
));
2529 c
= *input_line_pointer
;
2530 *input_line_pointer
= '\0';
2533 name
= xstrdup (name
);
2535 *input_line_pointer
= c
;
2537 seg
= subseg_new (name
, 0);
2539 if (*input_line_pointer
== ',')
2543 ++input_line_pointer
;
2544 align
= get_absolute_expression ();
2545 record_alignment (seg
, align
);
2549 if (*input_line_pointer
== ',')
2551 c
= *++input_line_pointer
;
2553 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
2556 as_bad (_("unrecognized section type"));
2557 ++input_line_pointer
;
2559 #ifdef BFD_ASSEMBLER
2563 flags
= SEC_NO_FLAGS
;
2565 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
2566 else if (*type
== 'D' || *type
== 'M')
2567 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
2568 else if (*type
== 'R')
2569 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
2570 if (flags
!= SEC_NO_FLAGS
)
2572 if (!bfd_set_section_flags (stdoutput
, seg
, flags
))
2573 as_warn (_("error setting flags for \"%s\": %s"),
2574 bfd_section_name (stdoutput
, seg
),
2575 bfd_errmsg (bfd_get_error ()));
2581 /* Ignore the HP type. */
2582 if (*input_line_pointer
== ',')
2583 input_line_pointer
+= 2;
2585 demand_empty_rest_of_line ();
2587 #else /* ! TC_M68K */
2596 name
= input_line_pointer
;
2597 c
= get_symbol_end ();
2599 name
= xstrdup (name
);
2601 *input_line_pointer
= c
;
2603 seg
= subseg_new (name
, 0);
2605 if (*input_line_pointer
!= ',')
2611 ++input_line_pointer
;
2613 sectype
= input_line_pointer
;
2614 c
= get_symbol_end ();
2615 if (*sectype
== '\0')
2617 else if (strcasecmp (sectype
, "text") == 0)
2619 else if (strcasecmp (sectype
, "data") == 0)
2621 else if (strcasecmp (sectype
, "romdata") == 0)
2624 as_warn (_("unrecognized section type `%s'"), sectype
);
2625 *input_line_pointer
= c
;
2628 if (*input_line_pointer
== ',')
2632 ++input_line_pointer
;
2634 seccmd
= input_line_pointer
;
2635 c
= get_symbol_end ();
2636 if (strcasecmp (seccmd
, "absolute") == 0)
2638 as_bad (_("absolute sections are not supported"));
2639 *input_line_pointer
= c
;
2640 ignore_rest_of_line ();
2643 else if (strcasecmp (seccmd
, "align") == 0)
2647 *input_line_pointer
= c
;
2648 align
= get_absolute_expression ();
2649 record_alignment (seg
, align
);
2653 as_warn (_("unrecognized section command `%s'"), seccmd
);
2654 *input_line_pointer
= c
;
2658 demand_empty_rest_of_line ();
2660 #else /* ! TC_I960 */
2661 /* The MRI assembler seems to use different forms of .sect for
2662 different targets. */
2663 as_bad ("MRI mode not supported for this target");
2664 ignore_rest_of_line ();
2665 #endif /* ! TC_I960 */
2666 #endif /* ! TC_M68K */
2669 /* Handle the .print pseudo-op. */
2672 s_print (int ignore ATTRIBUTE_UNUSED
)
2677 s
= demand_copy_C_string (&len
);
2680 demand_empty_rest_of_line ();
2683 /* Handle the .purgem pseudo-op. */
2686 s_purgem (int ignore ATTRIBUTE_UNUSED
)
2688 if (is_it_end_of_statement ())
2690 demand_empty_rest_of_line ();
2700 name
= input_line_pointer
;
2701 c
= get_symbol_end ();
2702 delete_macro (name
);
2703 *input_line_pointer
= c
;
2706 while (*input_line_pointer
++ == ',');
2708 --input_line_pointer
;
2709 demand_empty_rest_of_line ();
2712 /* Handle the .endm/.endr pseudo-ops. */
2715 s_bad_end (int endr
)
2717 as_warn (_(".end%c encountered without preceeding %s"),
2719 endr
? ".rept, .irp, or .irpc" : ".macro");
2720 demand_empty_rest_of_line ();
2723 /* Handle the .rept pseudo-op. */
2726 s_rept (int ignore ATTRIBUTE_UNUSED
)
2730 count
= get_absolute_expression ();
2732 do_repeat (count
, "REPT", "ENDR");
2735 /* This function provides a generic repeat block implementation. It allows
2736 different directives to be used as the start/end keys. */
2739 do_repeat (int count
, const char *start
, const char *end
)
2745 if (!buffer_and_nest (start
, end
, &one
, get_line_sb
))
2747 as_bad (_("%s without %s"), start
, end
);
2753 sb_add_sb (&many
, &one
);
2757 input_scrub_include_sb (&many
, input_line_pointer
, 1);
2759 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2762 /* Skip to end of current repeat loop; EXTRA indicates how many additional
2763 input buffers to skip. Assumes that conditionals preceding the loop end
2764 are properly nested.
2766 This function makes it easier to implement a premature "break" out of the
2767 loop. The EXTRA arg accounts for other buffers we might have inserted,
2768 such as line substitutions. */
2771 end_repeat (int extra
)
2773 cond_exit_macro (macro_nest
);
2774 while (extra
-- >= 0)
2775 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2779 assign_symbol (char *name
, int no_reassign
)
2783 if (name
[0] == '.' && name
[1] == '\0')
2785 /* Turn '. = mumble' into a .org mumble. */
2789 segment
= get_known_segmented_expression (&exp
);
2792 do_org (segment
, &exp
, 0);
2797 if ((symbolP
= symbol_find (name
)) == NULL
2798 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
2800 symbolP
= symbol_find_or_make (name
);
2802 /* When doing symbol listings, play games with dummy fragments living
2803 outside the normal fragment chain to record the file and line info
2805 if (listing
& LISTING_SYMBOLS
)
2807 extern struct list_info_struct
*listing_tail
;
2808 fragS
*dummy_frag
= (fragS
*) xcalloc (1, sizeof (fragS
));
2809 dummy_frag
->line
= listing_tail
;
2810 dummy_frag
->fr_symbol
= symbolP
;
2811 symbol_set_frag (symbolP
, dummy_frag
);
2815 /* "set" symbols are local unless otherwise specified. */
2816 SF_SET_LOCAL (symbolP
);
2820 /* Permit register names to be redefined. */
2822 && S_IS_DEFINED (symbolP
)
2823 && S_GET_SEGMENT (symbolP
) != reg_section
)
2824 as_bad (_("symbol `%s' is already defined"), name
);
2826 pseudo_set (symbolP
);
2829 /* Handle the .equ, .equiv and .set directives. If EQUIV is 1, then
2830 this is .equiv, and it is an error if the symbol is already
2840 /* Especial apologies for the random logic:
2841 this just grew, and could be parsed much more simply!
2843 name
= input_line_pointer
;
2844 delim
= get_symbol_end ();
2845 end_name
= input_line_pointer
;
2848 if (name
== end_name
)
2850 as_bad (_("expected symbol name"));
2851 discard_rest_of_line ();
2857 if (*input_line_pointer
!= ',')
2860 as_bad (_("expected comma after \"%s\""), name
);
2862 ignore_rest_of_line ();
2866 input_line_pointer
++;
2869 assign_symbol (name
, equiv
);
2872 demand_empty_rest_of_line ();
2885 #ifdef md_flush_pending_output
2886 md_flush_pending_output ();
2890 stop
= mri_comment_field (&stopc
);
2892 /* In m68k MRI mode, we need to align to a word boundary, unless
2894 if (flag_m68k_mri
&& mult
> 1)
2896 if (now_seg
== absolute_section
)
2898 abs_section_offset
+= abs_section_offset
& 1;
2899 if (line_label
!= NULL
)
2900 S_SET_VALUE (line_label
, abs_section_offset
);
2902 else if (mri_common_symbol
!= NULL
)
2906 val
= S_GET_VALUE (mri_common_symbol
);
2909 S_SET_VALUE (mri_common_symbol
, val
+ 1);
2910 if (line_label
!= NULL
)
2912 expressionS
*symexp
;
2914 symexp
= symbol_get_value_expression (line_label
);
2915 know (symexp
->X_op
== O_symbol
);
2916 know (symexp
->X_add_symbol
== mri_common_symbol
);
2917 symexp
->X_add_number
+= 1;
2923 do_align (1, (char *) NULL
, 0, 0);
2924 if (line_label
!= NULL
)
2926 symbol_set_frag (line_label
, frag_now
);
2927 S_SET_VALUE (line_label
, frag_now_fix ());
2937 if (*input_line_pointer
== ',')
2939 ++input_line_pointer
;
2944 val
.X_op
= O_constant
;
2945 val
.X_add_number
= 0;
2948 if (val
.X_op
!= O_constant
2949 || val
.X_add_number
< - 0x80
2950 || val
.X_add_number
> 0xff
2951 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
2953 if (exp
.X_op
!= O_constant
)
2954 as_bad (_("unsupported variable size or fill value"));
2961 bytes
= mult
* exp
.X_add_number
;
2962 for (i
= 0; i
< exp
.X_add_number
; i
++)
2963 emit_expr (&val
, mult
);
2968 if (exp
.X_op
== O_constant
)
2972 repeat
= exp
.X_add_number
;
2979 as_warn (_(".space repeat count is zero, ignored"));
2980 else if (repeat
< 0)
2981 as_warn (_(".space repeat count is negative, ignored"));
2985 /* If we are in the absolute section, just bump the offset. */
2986 if (now_seg
== absolute_section
)
2988 abs_section_offset
+= repeat
;
2992 /* If we are secretly in an MRI common section, then
2993 creating space just increases the size of the common
2995 if (mri_common_symbol
!= NULL
)
2997 S_SET_VALUE (mri_common_symbol
,
2998 S_GET_VALUE (mri_common_symbol
) + repeat
);
3003 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
3004 (offsetT
) repeat
, (char *) 0);
3008 if (now_seg
== absolute_section
)
3010 as_bad (_("space allocation too complex in absolute section"));
3011 subseg_set (text_section
, 0);
3014 if (mri_common_symbol
!= NULL
)
3016 as_bad (_("space allocation too complex in common section"));
3017 mri_common_symbol
= NULL
;
3021 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
3022 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
3026 *p
= val
.X_add_number
;
3031 /* In MRI mode, after an odd number of bytes, we must align to an
3032 even word boundary, unless the next instruction is a dc.b, ds.b
3034 if (flag_mri
&& (bytes
& 1) != 0)
3035 mri_pending_align
= 1;
3037 demand_empty_rest_of_line ();
3040 mri_comment_end (stop
, stopc
);
3043 /* This is like s_space, but the value is a floating point number with
3044 the given precision. This is for the MRI dcb.s pseudo-op and
3048 s_float_space (int float_type
)
3052 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
3057 stop
= mri_comment_field (&stopc
);
3059 count
= get_absolute_expression ();
3062 if (*input_line_pointer
!= ',')
3064 as_bad (_("missing value"));
3065 ignore_rest_of_line ();
3067 mri_comment_end (stop
, stopc
);
3071 ++input_line_pointer
;
3075 /* Skip any 0{letter} that may be present. Don't even check if the
3076 * letter is legal. */
3077 if (input_line_pointer
[0] == '0'
3078 && ISALPHA (input_line_pointer
[1]))
3079 input_line_pointer
+= 2;
3081 /* Accept :xxxx, where the x's are hex digits, for a floating point
3082 with the exact digits specified. */
3083 if (input_line_pointer
[0] == ':')
3085 flen
= hex_float (float_type
, temp
);
3088 ignore_rest_of_line ();
3090 mri_comment_end (stop
, stopc
);
3098 err
= md_atof (float_type
, temp
, &flen
);
3099 know (flen
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3103 as_bad (_("bad floating literal: %s"), err
);
3104 ignore_rest_of_line ();
3106 mri_comment_end (stop
, stopc
);
3111 while (--count
>= 0)
3115 p
= frag_more (flen
);
3116 memcpy (p
, temp
, (unsigned int) flen
);
3119 demand_empty_rest_of_line ();
3122 mri_comment_end (stop
, stopc
);
3125 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3128 s_struct (int ignore ATTRIBUTE_UNUSED
)
3134 stop
= mri_comment_field (&stopc
);
3135 abs_section_offset
= get_absolute_expression ();
3136 subseg_set (absolute_section
, 0);
3137 demand_empty_rest_of_line ();
3139 mri_comment_end (stop
, stopc
);
3143 s_text (int ignore ATTRIBUTE_UNUSED
)
3147 temp
= get_absolute_expression ();
3148 subseg_set (text_section
, (subsegT
) temp
);
3149 demand_empty_rest_of_line ();
3151 const_flag
&= ~IN_DEFAULT_SECTION
;
3156 /* Verify that we are at the end of a line. If not, issue an error and
3160 demand_empty_rest_of_line (void)
3163 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3164 input_line_pointer
++;
3167 if (ISPRINT (*input_line_pointer
))
3168 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3169 *input_line_pointer
);
3171 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3172 *input_line_pointer
);
3173 ignore_rest_of_line ();
3176 /* Return pointing just after end-of-line. */
3177 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3180 /* Silently advance to the end of line. Use this after already having
3181 issued an error about something bad. */
3184 ignore_rest_of_line (void)
3186 while (input_line_pointer
< buffer_limit
3187 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3188 input_line_pointer
++;
3190 input_line_pointer
++;
3192 /* Return pointing just after end-of-line. */
3193 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3197 discard_rest_of_line (void)
3199 while (input_line_pointer
< buffer_limit
3200 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3201 input_line_pointer
++;
3203 input_line_pointer
++;
3205 /* Return pointing just after end-of-line. */
3206 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3209 /* Sets frag for given symbol to zero_address_frag, except when the
3210 symbol frag is already set to a dummy listing frag. */
3213 set_zero_frag (symbolS
*symbolP
)
3215 if (symbol_get_frag (symbolP
)->fr_type
!= rs_dummy
)
3216 symbol_set_frag (symbolP
, &zero_address_frag
);
3219 /* In: Pointer to a symbol.
3220 Input_line_pointer->expression.
3222 Out: Input_line_pointer->just after any whitespace after expression.
3223 Tried to set symbol to value of expression.
3224 Will change symbols type, value, and frag; */
3227 pseudo_set (symbolS
*symbolP
)
3231 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3233 #endif /* OBJ_AOUT or OBJ_BOUT */
3235 know (symbolP
); /* NULL pointer is logic error. */
3237 (void) expression (&exp
);
3239 if (exp
.X_op
== O_illegal
)
3240 as_bad (_("illegal expression"));
3241 else if (exp
.X_op
== O_absent
)
3242 as_bad (_("missing expression"));
3243 else if (exp
.X_op
== O_big
)
3245 if (exp
.X_add_number
> 0)
3246 as_bad (_("bignum invalid"));
3248 as_bad (_("floating point number invalid"));
3250 else if (exp
.X_op
== O_subtract
3251 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
3252 && (symbol_get_frag (exp
.X_add_symbol
)
3253 == symbol_get_frag (exp
.X_op_symbol
)))
3255 exp
.X_op
= O_constant
;
3256 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
3257 - S_GET_VALUE (exp
.X_op_symbol
));
3260 if (symbol_section_p (symbolP
))
3262 as_bad ("attempt to set value of section symbol");
3265 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3266 ext
= S_IS_EXTERNAL (symbolP
);
3267 #endif /* OBJ_AOUT or OBJ_BOUT */
3274 exp
.X_add_number
= 0;
3277 S_SET_SEGMENT (symbolP
, absolute_section
);
3278 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3279 set_zero_frag (symbolP
);
3283 S_SET_SEGMENT (symbolP
, reg_section
);
3284 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3285 set_zero_frag (symbolP
);
3289 seg
= S_GET_SEGMENT (exp
.X_add_symbol
);
3290 /* For x=undef+const, create an expression symbol.
3291 For x=x+const, just update x except when x is an undefined symbol
3292 For x=defined+const, evaluate x. */
3293 if (symbolP
== exp
.X_add_symbol
3294 && (seg
!= undefined_section
3295 || !symbol_constant_p (symbolP
)))
3297 *symbol_X_add_number (symbolP
) += exp
.X_add_number
;
3300 else if (seg
!= undefined_section
)
3302 symbolS
*s
= exp
.X_add_symbol
;
3304 if (S_IS_COMMON (s
))
3305 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3306 S_GET_NAME (symbolP
), S_GET_NAME (s
));
3308 S_SET_SEGMENT (symbolP
, seg
);
3309 S_SET_VALUE (symbolP
, exp
.X_add_number
+ S_GET_VALUE (s
));
3310 symbol_set_frag (symbolP
, symbol_get_frag (s
));
3311 copy_symbol_attributes (symbolP
, s
);
3317 /* The value is some complex expression.
3318 Set segment and frag back to that of a newly created symbol. */
3319 S_SET_SEGMENT (symbolP
, undefined_section
);
3320 symbol_set_value_expression (symbolP
, &exp
);
3321 set_zero_frag (symbolP
);
3325 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3327 S_SET_EXTERNAL (symbolP
);
3329 S_CLEAR_EXTERNAL (symbolP
);
3330 #endif /* OBJ_AOUT or OBJ_BOUT */
3335 CONStruct more frag of .bytes, or .words etc.
3336 Should need_pass_2 be 1 then emit no frag(s).
3337 This understands EXPRESSIONS.
3341 This has a split personality. We use expression() to read the
3342 value. We can detect if the value won't fit in a byte or word.
3343 But we can't detect if expression() discarded significant digits
3344 in the case of a long. Not worth the crocks required to fix it. */
3346 /* Select a parser for cons expressions. */
3348 /* Some targets need to parse the expression in various fancy ways.
3349 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3350 (for example, the HPPA does this). Otherwise, you can define
3351 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3352 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3353 are defined, which is the normal case, then only simple expressions
3358 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
3361 #ifndef TC_PARSE_CONS_EXPRESSION
3362 #ifdef BITFIELD_CONS_EXPRESSIONS
3363 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3365 parse_bitfield_cons (expressionS
*exp
, unsigned int nbytes
);
3367 #ifdef REPEAT_CONS_EXPRESSIONS
3368 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3370 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
3373 /* If we haven't gotten one yet, just call expression. */
3374 #ifndef TC_PARSE_CONS_EXPRESSION
3375 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3380 do_parse_cons_expression (expressionS
*exp
,
3381 int nbytes ATTRIBUTE_UNUSED
)
3383 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3387 /* Worker to do .byte etc statements.
3388 Clobbers input_line_pointer and checks end-of-line. */
3391 cons_worker (register int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
3399 #ifdef md_flush_pending_output
3400 md_flush_pending_output ();
3404 stop
= mri_comment_field (&stopc
);
3406 if (is_it_end_of_statement ())
3408 demand_empty_rest_of_line ();
3410 mri_comment_end (stop
, stopc
);
3414 #ifdef TC_ADDRESS_BYTES
3416 nbytes
= TC_ADDRESS_BYTES ();
3419 #ifdef md_cons_align
3420 md_cons_align (nbytes
);
3428 parse_mri_cons (&exp
, (unsigned int) nbytes
);
3431 TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
3435 if (exp
.X_op
== O_symbol
)
3436 exp
.X_op
= O_symbol_rva
;
3438 as_fatal (_("rva without symbol"));
3440 emit_expr (&exp
, (unsigned int) nbytes
);
3443 while (*input_line_pointer
++ == ',');
3445 /* In MRI mode, after an odd number of bytes, we must align to an
3446 even word boundary, unless the next instruction is a dc.b, ds.b
3448 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
3449 mri_pending_align
= 1;
3451 input_line_pointer
--; /* Put terminator back into stream. */
3453 demand_empty_rest_of_line ();
3456 mri_comment_end (stop
, stopc
);
3462 cons_worker (size
, 0);
3468 cons_worker (size
, 1);
3471 /* Put the contents of expression EXP into the object file using
3472 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3475 emit_expr (expressionS
*exp
, unsigned int nbytes
)
3479 valueT extra_digit
= 0;
3481 /* Don't do anything if we are going to make another pass. */
3485 dot_value
= frag_now_fix ();
3489 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3490 appear as a four byte positive constant in the .line section,
3491 followed by a 2 byte 0xffff. Look for that case here. */
3493 static int dwarf_line
= -1;
3495 if (strcmp (segment_name (now_seg
), ".line") != 0)
3497 else if (dwarf_line
>= 0
3499 && exp
->X_op
== O_constant
3500 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
3501 listing_source_line ((unsigned int) dwarf_line
);
3502 else if (nbytes
== 4
3503 && exp
->X_op
== O_constant
3504 && exp
->X_add_number
>= 0)
3505 dwarf_line
= exp
->X_add_number
;
3510 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3511 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3512 AT_sibling (0x12) followed by a four byte address of the sibling
3513 followed by a 2 byte AT_name (0x38) followed by the name of the
3514 file. We look for that case here. */
3516 static int dwarf_file
= 0;
3518 if (strcmp (segment_name (now_seg
), ".debug") != 0)
3520 else if (dwarf_file
== 0
3522 && exp
->X_op
== O_constant
3523 && exp
->X_add_number
== 0x11)
3525 else if (dwarf_file
== 1
3527 && exp
->X_op
== O_constant
3528 && exp
->X_add_number
== 0x12)
3530 else if (dwarf_file
== 2
3533 else if (dwarf_file
== 3
3535 && exp
->X_op
== O_constant
3536 && exp
->X_add_number
== 0x38)
3541 /* The variable dwarf_file_string tells stringer that the string
3542 may be the name of the source file. */
3543 if (dwarf_file
== 4)
3544 dwarf_file_string
= 1;
3546 dwarf_file_string
= 0;
3551 if (check_eh_frame (exp
, &nbytes
))
3556 /* Allow `.word 0' in the absolute section. */
3557 if (now_seg
== absolute_section
)
3559 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
3560 as_bad (_("attempt to store value in absolute section"));
3561 abs_section_offset
+= nbytes
;
3565 /* Handle a negative bignum. */
3567 && exp
->X_add_number
== 0
3568 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
3569 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
3572 unsigned long carry
;
3574 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
3576 /* Negate the bignum: one's complement each digit and add 1. */
3578 for (i
= 0; i
< exp
->X_add_number
; i
++)
3582 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
3585 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
3586 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
3589 /* We can ignore any carry out, because it will be handled by
3590 extra_digit if it is needed. */
3592 extra_digit
= (valueT
) -1;
3596 if (op
== O_absent
|| op
== O_illegal
)
3598 as_warn (_("zero assumed for missing expression"));
3599 exp
->X_add_number
= 0;
3602 else if (op
== O_big
&& exp
->X_add_number
<= 0)
3604 as_bad (_("floating point number invalid"));
3605 exp
->X_add_number
= 0;
3608 else if (op
== O_register
)
3610 as_warn (_("register value used as expression"));
3614 p
= frag_more ((int) nbytes
);
3616 #ifndef WORKING_DOT_WORD
3617 /* If we have the difference of two symbols in a word, save it on
3618 the broken_words list. See the code in write.c. */
3619 if (op
== O_subtract
&& nbytes
== 2)
3621 struct broken_word
*x
;
3623 x
= (struct broken_word
*) xmalloc (sizeof (struct broken_word
));
3624 x
->next_broken_word
= broken_words
;
3627 x
->subseg
= now_subseg
;
3629 x
->word_goes_here
= p
;
3631 x
->add
= exp
->X_add_symbol
;
3632 x
->sub
= exp
->X_op_symbol
;
3633 x
->addnum
= exp
->X_add_number
;
3641 /* If we have an integer, but the number of bytes is too large to
3642 pass to md_number_to_chars, handle it as a bignum. */
3643 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
3645 extra_digit
= exp
->X_unsigned
? 0 : -1;
3646 convert_to_bignum (exp
);
3650 if (op
== O_constant
)
3652 register valueT get
;
3653 register valueT use
;
3654 register valueT mask
;
3656 register valueT unmask
;
3658 /* JF << of >= number of bits in the object is undefined. In
3659 particular SPARC (Sun 4) has problems. */
3660 if (nbytes
>= sizeof (valueT
))
3663 if (nbytes
> sizeof (valueT
))
3666 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
3670 /* Don't store these bits. */
3671 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
3672 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
3675 unmask
= ~mask
; /* Do store these bits. */
3678 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3679 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
3682 get
= exp
->X_add_number
;
3684 if ((get
& mask
) != 0
3685 && ((get
& mask
) != mask
3686 || (get
& hibit
) == 0))
3687 { /* Leading bits contain both 0s & 1s. */
3688 as_warn (_("value 0x%lx truncated to 0x%lx"),
3689 (unsigned long) get
, (unsigned long) use
);
3691 /* Put bytes in right order. */
3692 md_number_to_chars (p
, use
, (int) nbytes
);
3694 else if (op
== O_big
)
3697 LITTLENUM_TYPE
*nums
;
3699 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
3701 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
3704 as_warn (_("bignum truncated to %d bytes"), nbytes
);
3708 if (target_big_endian
)
3710 while (nbytes
> size
)
3712 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
3713 nbytes
-= CHARS_PER_LITTLENUM
;
3714 p
+= CHARS_PER_LITTLENUM
;
3717 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
3718 while (size
>= CHARS_PER_LITTLENUM
)
3721 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
3722 size
-= CHARS_PER_LITTLENUM
;
3723 p
+= CHARS_PER_LITTLENUM
;
3728 nums
= generic_bignum
;
3729 while (size
>= CHARS_PER_LITTLENUM
)
3731 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
3733 size
-= CHARS_PER_LITTLENUM
;
3734 p
+= CHARS_PER_LITTLENUM
;
3735 nbytes
-= CHARS_PER_LITTLENUM
;
3738 while (nbytes
>= CHARS_PER_LITTLENUM
)
3740 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
3741 nbytes
-= CHARS_PER_LITTLENUM
;
3742 p
+= CHARS_PER_LITTLENUM
;
3748 memset (p
, 0, nbytes
);
3750 /* Now we need to generate a fixS to record the symbol value.
3751 This is easy for BFD. For other targets it can be more
3752 complex. For very complex cases (currently, the HPPA and
3753 NS32K), you can define TC_CONS_FIX_NEW to do whatever you
3754 want. For simpler cases, you can define TC_CONS_RELOC to be
3755 the name of the reloc code that should be stored in the fixS.
3756 If neither is defined, the code uses NO_RELOC if it is
3757 defined, and otherwise uses 0. */
3759 #ifdef BFD_ASSEMBLER
3760 #ifdef TC_CONS_FIX_NEW
3761 TC_CONS_FIX_NEW (frag_now
, p
- frag_now
->fr_literal
, nbytes
, exp
);
3764 bfd_reloc_code_real_type r
;
3781 as_bad (_("unsupported BFD relocation size %u"), nbytes
);
3785 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, (int) nbytes
, exp
,
3790 #ifdef TC_CONS_FIX_NEW
3791 TC_CONS_FIX_NEW (frag_now
, p
- frag_now
->fr_literal
, nbytes
, exp
);
3793 /* Figure out which reloc number to use. Use TC_CONS_RELOC if
3794 it is defined, otherwise use NO_RELOC if it is defined,
3796 #ifndef TC_CONS_RELOC
3798 #define TC_CONS_RELOC NO_RELOC
3800 #define TC_CONS_RELOC 0
3803 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, (int) nbytes
, exp
, 0,
3805 #endif /* TC_CONS_FIX_NEW */
3806 #endif /* BFD_ASSEMBLER */
3810 #ifdef BITFIELD_CONS_EXPRESSIONS
3812 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3813 w:x,y:z, where w and y are bitwidths and x and y are values. They
3814 then pack them all together. We do a little better in that we allow
3815 them in words, longs, etc. and we'll pack them in target byte order
3818 The rules are: pack least significant bit first, if a field doesn't
3819 entirely fit, put it in the next unit. Overflowing the bitfield is
3820 explicitly *not* even a warning. The bitwidth should be considered
3823 To use this function the tc-XXX.h file should define
3824 BITFIELD_CONS_EXPRESSIONS. */
3827 parse_bitfield_cons (exp
, nbytes
)
3829 unsigned int nbytes
;
3831 unsigned int bits_available
= BITS_PER_CHAR
* nbytes
;
3832 char *hold
= input_line_pointer
;
3834 (void) expression (exp
);
3836 if (*input_line_pointer
== ':')
3843 unsigned long width
;
3845 if (*input_line_pointer
!= ':')
3847 input_line_pointer
= hold
;
3849 } /* Next piece is not a bitfield. */
3851 /* In the general case, we can't allow
3852 full expressions with symbol
3853 differences and such. The relocation
3854 entries for symbols not defined in this
3855 assembly would require arbitrary field
3856 widths, positions, and masks which most
3857 of our current object formats don't
3860 In the specific case where a symbol
3861 *is* defined in this assembly, we
3862 *could* build fixups and track it, but
3863 this could lead to confusion for the
3864 backends. I'm lazy. I'll take any
3865 SEG_ABSOLUTE. I think that means that
3866 you can use a previous .set or
3867 .equ type symbol. xoxorich. */
3869 if (exp
->X_op
== O_absent
)
3871 as_warn (_("using a bit field width of zero"));
3872 exp
->X_add_number
= 0;
3873 exp
->X_op
= O_constant
;
3874 } /* Implied zero width bitfield. */
3876 if (exp
->X_op
!= O_constant
)
3878 *input_line_pointer
= '\0';
3879 as_bad (_("field width \"%s\" too complex for a bitfield"), hold
);
3880 *input_line_pointer
= ':';
3881 demand_empty_rest_of_line ();
3883 } /* Too complex. */
3885 if ((width
= exp
->X_add_number
) > (BITS_PER_CHAR
* nbytes
))
3887 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
3888 width
, nbytes
, (BITS_PER_CHAR
* nbytes
));
3889 width
= BITS_PER_CHAR
* nbytes
;
3892 if (width
> bits_available
)
3894 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
3895 input_line_pointer
= hold
;
3896 exp
->X_add_number
= value
;
3901 hold
= ++input_line_pointer
;
3903 (void) expression (exp
);
3904 if (exp
->X_op
!= O_constant
)
3906 char cache
= *input_line_pointer
;
3908 *input_line_pointer
= '\0';
3909 as_bad (_("field value \"%s\" too complex for a bitfield"), hold
);
3910 *input_line_pointer
= cache
;
3911 demand_empty_rest_of_line ();
3913 } /* Too complex. */
3915 value
|= ((~(-1 << width
) & exp
->X_add_number
)
3916 << ((BITS_PER_CHAR
* nbytes
) - bits_available
));
3918 if ((bits_available
-= width
) == 0
3919 || is_it_end_of_statement ()
3920 || *input_line_pointer
!= ',')
3923 } /* All the bitfields we're gonna get. */
3925 hold
= ++input_line_pointer
;
3926 (void) expression (exp
);
3929 exp
->X_add_number
= value
;
3930 exp
->X_op
= O_constant
;
3931 exp
->X_unsigned
= 1;
3935 #endif /* BITFIELD_CONS_EXPRESSIONS */
3937 /* Handle an MRI style string expression. */
3941 parse_mri_cons (exp
, nbytes
)
3943 unsigned int nbytes
;
3945 if (*input_line_pointer
!= '\''
3946 && (input_line_pointer
[1] != '\''
3947 || (*input_line_pointer
!= 'A'
3948 && *input_line_pointer
!= 'E')))
3949 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3953 unsigned int result
= 0;
3955 /* An MRI style string. Cut into as many bytes as will fit into
3956 a nbyte chunk, left justify if necessary, and separate with
3957 commas so we can try again later. */
3958 if (*input_line_pointer
== 'A')
3959 ++input_line_pointer
;
3960 else if (*input_line_pointer
== 'E')
3962 as_bad (_("EBCDIC constants are not supported"));
3963 ++input_line_pointer
;
3966 input_line_pointer
++;
3967 for (scan
= 0; scan
< nbytes
; scan
++)
3969 if (*input_line_pointer
== '\'')
3971 if (input_line_pointer
[1] == '\'')
3973 input_line_pointer
++;
3978 result
= (result
<< 8) | (*input_line_pointer
++);
3982 while (scan
< nbytes
)
3988 /* Create correct expression. */
3989 exp
->X_op
= O_constant
;
3990 exp
->X_add_number
= result
;
3992 /* Fake it so that we can read the next char too. */
3993 if (input_line_pointer
[0] != '\'' ||
3994 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
3996 input_line_pointer
-= 2;
3997 input_line_pointer
[0] = ',';
3998 input_line_pointer
[1] = '\'';
4001 input_line_pointer
++;
4004 #endif /* TC_M68K */
4006 #ifdef REPEAT_CONS_EXPRESSIONS
4008 /* Parse a repeat expression for cons. This is used by the MIPS
4009 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4010 object file COUNT times.
4012 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4015 parse_repeat_cons (exp
, nbytes
)
4017 unsigned int nbytes
;
4024 if (*input_line_pointer
!= ':')
4026 /* No repeat count. */
4030 ++input_line_pointer
;
4031 expression (&count
);
4032 if (count
.X_op
!= O_constant
4033 || count
.X_add_number
<= 0)
4035 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4039 /* The cons function is going to output this expression once. So we
4040 output it count - 1 times. */
4041 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
4042 emit_expr (exp
, nbytes
);
4045 #endif /* REPEAT_CONS_EXPRESSIONS */
4047 /* Parse a floating point number represented as a hex constant. This
4048 permits users to specify the exact bits they want in the floating
4052 hex_float (int float_type
, char *bytes
)
4084 as_bad (_("unknown floating type type '%c'"), float_type
);
4088 /* It would be nice if we could go through expression to parse the
4089 hex constant, but if we get a bignum it's a pain to sort it into
4090 the buffer correctly. */
4092 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4096 /* The MRI assembler accepts arbitrary underscores strewn about
4097 through the hex constant, so we ignore them as well. */
4098 if (*input_line_pointer
== '_')
4100 ++input_line_pointer
;
4106 as_warn (_("floating point constant too large"));
4109 d
= hex_value (*input_line_pointer
) << 4;
4110 ++input_line_pointer
;
4111 while (*input_line_pointer
== '_')
4112 ++input_line_pointer
;
4113 if (hex_p (*input_line_pointer
))
4115 d
+= hex_value (*input_line_pointer
);
4116 ++input_line_pointer
;
4118 if (target_big_endian
)
4121 bytes
[length
- i
- 1] = d
;
4127 if (target_big_endian
)
4128 memset (bytes
+ i
, 0, length
- i
);
4130 memset (bytes
, 0, length
- i
);
4138 CONStruct some more frag chars of .floats .ffloats etc.
4139 Makes 0 or more new frags.
4140 If need_pass_2 == 1, no frags are emitted.
4141 This understands only floating literals, not expressions. Sorry.
4143 A floating constant is defined by atof_generic(), except it is preceded
4144 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4145 reading, I decided to be incompatible. This always tries to give you
4146 rounded bits to the precision of the pseudo-op. Former AS did premature
4147 truncation, restored noisy bits instead of trailing 0s AND gave you
4148 a choice of 2 flavours of noise according to which of 2 floating-point
4149 scanners you directed AS to use.
4151 In: input_line_pointer->whitespace before, or '0' of flonum. */
4154 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4155 register int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4158 int length
; /* Number of chars in an object. */
4159 register char *err
; /* Error from scanning floating literal. */
4160 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4162 if (is_it_end_of_statement ())
4164 demand_empty_rest_of_line ();
4168 #ifdef md_flush_pending_output
4169 md_flush_pending_output ();
4174 /* input_line_pointer->1st char of a flonum (we hope!). */
4177 /* Skip any 0{letter} that may be present. Don't even check if the
4178 letter is legal. Someone may invent a "z" format and this routine
4179 has no use for such information. Lusers beware: you get
4180 diagnostics if your input is ill-conditioned. */
4181 if (input_line_pointer
[0] == '0'
4182 && ISALPHA (input_line_pointer
[1]))
4183 input_line_pointer
+= 2;
4185 /* Accept :xxxx, where the x's are hex digits, for a floating
4186 point with the exact digits specified. */
4187 if (input_line_pointer
[0] == ':')
4189 ++input_line_pointer
;
4190 length
= hex_float (float_type
, temp
);
4193 ignore_rest_of_line ();
4199 err
= md_atof (float_type
, temp
, &length
);
4200 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
4204 as_bad (_("bad floating literal: %s"), err
);
4205 ignore_rest_of_line ();
4216 #ifdef REPEAT_CONS_EXPRESSIONS
4217 if (*input_line_pointer
== ':')
4219 expressionS count_exp
;
4221 ++input_line_pointer
;
4222 expression (&count_exp
);
4224 if (count_exp
.X_op
!= O_constant
4225 || count_exp
.X_add_number
<= 0)
4226 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4228 count
= count_exp
.X_add_number
;
4232 while (--count
>= 0)
4234 p
= frag_more (length
);
4235 memcpy (p
, temp
, (unsigned int) length
);
4240 while (*input_line_pointer
++ == ',');
4242 /* Put terminator back into stream. */
4243 --input_line_pointer
;
4244 demand_empty_rest_of_line ();
4247 /* Return the size of a LEB128 value. */
4250 sizeof_sleb128 (offsetT value
)
4252 register int size
= 0;
4253 register unsigned byte
;
4257 byte
= (value
& 0x7f);
4258 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4259 Fortunately, we can structure things so that the extra work reduces
4260 to a noop on systems that do things "properly". */
4261 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4264 while (!(((value
== 0) && ((byte
& 0x40) == 0))
4265 || ((value
== -1) && ((byte
& 0x40) != 0))));
4271 sizeof_uleb128 (valueT value
)
4273 register int size
= 0;
4274 register unsigned byte
;
4278 byte
= (value
& 0x7f);
4288 sizeof_leb128 (valueT value
, int sign
)
4291 return sizeof_sleb128 ((offsetT
) value
);
4293 return sizeof_uleb128 (value
);
4296 /* Output a LEB128 value. */
4299 output_sleb128 (char *p
, offsetT value
)
4301 register char *orig
= p
;
4306 unsigned byte
= (value
& 0x7f);
4308 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4309 Fortunately, we can structure things so that the extra work reduces
4310 to a noop on systems that do things "properly". */
4311 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4313 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
4314 || ((value
== -1) && ((byte
& 0x40) != 0))));
4326 output_uleb128 (char *p
, valueT value
)
4332 unsigned byte
= (value
& 0x7f);
4335 /* More bytes to follow. */
4346 output_leb128 (char *p
, valueT value
, int sign
)
4349 return output_sleb128 (p
, (offsetT
) value
);
4351 return output_uleb128 (p
, value
);
4354 /* Do the same for bignums. We combine sizeof with output here in that
4355 we don't output for NULL values of P. It isn't really as critical as
4356 for "normal" values that this be streamlined. */
4359 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4366 /* Strip leading sign extensions off the bignum. */
4368 && bignum
[size
- 1] == LITTLENUM_MASK
4369 && bignum
[size
- 2] > LITTLENUM_MASK
/ 2)
4374 /* OR in the next part of the littlenum. */
4375 val
|= (*bignum
<< loaded
);
4376 loaded
+= LITTLENUM_NUMBER_OF_BITS
;
4380 /* Add bytes until there are less than 7 bits left in VAL
4381 or until every non-sign bit has been written. */
4388 || val
!= ((byte
& 0x40) == 0 ? 0 : ((valueT
) 1 << loaded
) - 1))
4395 while ((byte
& 0x80) != 0 && loaded
>= 7);
4399 /* Mop up any left-over bits (of which there will be less than 7). */
4400 if ((byte
& 0x80) != 0)
4402 /* Sign-extend VAL. */
4403 if (val
& (1 << (loaded
- 1)))
4404 val
|= ~0 << loaded
;
4414 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4421 /* Strip leading zeros off the bignum. */
4422 /* XXX: Is this needed? */
4423 while (size
> 0 && bignum
[size
- 1] == 0)
4428 if (loaded
< 7 && size
> 0)
4430 val
|= (*bignum
<< loaded
);
4431 loaded
+= 8 * CHARS_PER_LITTLENUM
;
4440 if (size
> 0 || val
)
4447 while (byte
& 0x80);
4453 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
, int sign
)
4456 return output_big_sleb128 (p
, bignum
, size
);
4458 return output_big_uleb128 (p
, bignum
, size
);
4461 /* Generate the appropriate fragments for a given expression to emit a
4465 emit_leb128_expr (expressionS
*exp
, int sign
)
4467 operatorT op
= exp
->X_op
;
4468 unsigned int nbytes
;
4470 if (op
== O_absent
|| op
== O_illegal
)
4472 as_warn (_("zero assumed for missing expression"));
4473 exp
->X_add_number
= 0;
4476 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4478 as_bad (_("floating point number invalid"));
4479 exp
->X_add_number
= 0;
4482 else if (op
== O_register
)
4484 as_warn (_("register value used as expression"));
4487 else if (op
== O_constant
4489 && (exp
->X_add_number
< 0) != !exp
->X_unsigned
)
4491 /* We're outputting a signed leb128 and the sign of X_add_number
4492 doesn't reflect the sign of the original value. Convert EXP
4493 to a correctly-extended bignum instead. */
4494 convert_to_bignum (exp
);
4498 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
4499 a signal that this is leb128 data. It shouldn't optimize this away. */
4500 nbytes
= (unsigned int) -1;
4501 if (check_eh_frame (exp
, &nbytes
))
4504 /* Let the backend know that subsequent data may be byte aligned. */
4505 #ifdef md_cons_align
4509 if (op
== O_constant
)
4511 /* If we've got a constant, emit the thing directly right now. */
4513 valueT value
= exp
->X_add_number
;
4517 size
= sizeof_leb128 (value
, sign
);
4518 p
= frag_more (size
);
4519 output_leb128 (p
, value
, sign
);
4521 else if (op
== O_big
)
4523 /* O_big is a different sort of constant. */
4528 size
= output_big_leb128 (NULL
, generic_bignum
, exp
->X_add_number
, sign
);
4529 p
= frag_more (size
);
4530 output_big_leb128 (p
, generic_bignum
, exp
->X_add_number
, sign
);
4534 /* Otherwise, we have to create a variable sized fragment and
4535 resolve things later. */
4537 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
4538 make_expr_symbol (exp
), 0, (char *) NULL
);
4542 /* Parse the .sleb128 and .uleb128 pseudos. */
4549 #ifdef md_flush_pending_output
4550 md_flush_pending_output ();
4556 emit_leb128_expr (&exp
, sign
);
4558 while (*input_line_pointer
++ == ',');
4560 input_line_pointer
--;
4561 demand_empty_rest_of_line ();
4564 /* We read 0 or more ',' separated, double-quoted strings.
4565 Caller should have checked need_pass_2 is FALSE because we don't
4569 stringer (/* Worker to do .ascii etc statements. */
4570 /* Checks end-of-line. */
4571 register int append_zero
/* 0: don't append '\0', else 1. */)
4573 register unsigned int c
;
4576 #ifdef md_flush_pending_output
4577 md_flush_pending_output ();
4580 /* The following awkward logic is to parse ZERO or more strings,
4581 comma separated. Recall a string expression includes spaces
4582 before the opening '\"' and spaces after the closing '\"'.
4583 We fake a leading ',' if there is (supposed to be)
4584 a 1st, expression. We keep demanding expressions for each ','. */
4585 if (is_it_end_of_statement ())
4587 c
= 0; /* Skip loop. */
4588 ++input_line_pointer
; /* Compensate for end of loop. */
4592 c
= ','; /* Do loop. */
4594 /* If we have been switched into the abs_section then we
4595 will not have an obstack onto which we can hang strings. */
4596 if (now_seg
== absolute_section
)
4598 as_bad (_("strings must be placed into a section"));
4600 ignore_rest_of_line ();
4603 while (c
== ',' || c
== '<' || c
== '"')
4606 switch (*input_line_pointer
)
4609 ++input_line_pointer
; /*->1st char of string. */
4610 start
= input_line_pointer
;
4611 while (is_a_char (c
= next_char_of_string ()))
4613 FRAG_APPEND_1_CHAR (c
);
4617 FRAG_APPEND_1_CHAR (0);
4619 know (input_line_pointer
[-1] == '\"');
4623 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
4624 will emit .string with a filename in the .debug section
4625 after a sequence of constants. See the comment in
4626 emit_expr for the sequence. emit_expr will set
4627 dwarf_file_string to non-zero if this string might be a
4628 source file name. */
4629 if (strcmp (segment_name (now_seg
), ".debug") != 0)
4630 dwarf_file_string
= 0;
4631 else if (dwarf_file_string
)
4633 c
= input_line_pointer
[-1];
4634 input_line_pointer
[-1] = '\0';
4635 listing_source_file (start
);
4636 input_line_pointer
[-1] = c
;
4643 input_line_pointer
++;
4644 c
= get_single_number ();
4645 FRAG_APPEND_1_CHAR (c
);
4646 if (*input_line_pointer
!= '>')
4648 as_bad (_("expected <nn>"));
4650 input_line_pointer
++;
4653 input_line_pointer
++;
4657 c
= *input_line_pointer
;
4660 demand_empty_rest_of_line ();
4663 /* FIXME-SOMEDAY: I had trouble here on characters with the
4664 high bits set. We'll probably also have trouble with
4665 multibyte chars, wide chars, etc. Also be careful about
4666 returning values bigger than 1 byte. xoxorich. */
4669 next_char_of_string (void)
4671 register unsigned int c
;
4673 c
= *input_line_pointer
++ & CHAR_MASK
;
4681 as_warn (_("unterminated string; newline inserted"));
4682 bump_line_counters ();
4685 #ifndef NO_STRING_ESCAPES
4687 switch (c
= *input_line_pointer
++)
4715 break; /* As itself. */
4731 for (i
= 0, number
= 0;
4732 ISDIGIT (c
) && i
< 3;
4733 c
= *input_line_pointer
++, i
++)
4735 number
= number
* 8 + c
- '0';
4740 --input_line_pointer
;
4749 c
= *input_line_pointer
++;
4750 while (ISXDIGIT (c
))
4753 number
= number
* 16 + c
- '0';
4754 else if (ISUPPER (c
))
4755 number
= number
* 16 + c
- 'A' + 10;
4757 number
= number
* 16 + c
- 'a' + 10;
4758 c
= *input_line_pointer
++;
4761 --input_line_pointer
;
4766 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
4767 as_warn (_("unterminated string; newline inserted"));
4769 bump_line_counters ();
4774 #ifdef ONLY_STANDARD_ESCAPES
4775 as_bad (_("bad escaped character in string"));
4777 #endif /* ONLY_STANDARD_ESCAPES */
4782 #endif /* ! defined (NO_STRING_ESCAPES) */
4791 get_segmented_expression (register expressionS
*expP
)
4793 register segT retval
;
4795 retval
= expression (expP
);
4796 if (expP
->X_op
== O_illegal
4797 || expP
->X_op
== O_absent
4798 || expP
->X_op
== O_big
)
4800 as_bad (_("expected address expression"));
4801 expP
->X_op
= O_constant
;
4802 expP
->X_add_number
= 0;
4803 retval
= absolute_section
;
4809 get_known_segmented_expression (register expressionS
*expP
)
4811 register segT retval
;
4813 if ((retval
= get_segmented_expression (expP
)) == undefined_section
)
4815 /* There is no easy way to extract the undefined symbol from the
4817 if (expP
->X_add_symbol
!= NULL
4818 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
4819 as_warn (_("symbol \"%s\" undefined; zero assumed"),
4820 S_GET_NAME (expP
->X_add_symbol
));
4822 as_warn (_("some symbol undefined; zero assumed"));
4823 retval
= absolute_section
;
4824 expP
->X_op
= O_constant
;
4825 expP
->X_add_number
= 0;
4827 know (retval
== absolute_section
|| SEG_NORMAL (retval
));
4832 get_absolute_expr (expressionS
*exp
)
4835 if (exp
->X_op
!= O_constant
)
4837 if (exp
->X_op
!= O_absent
)
4838 as_bad (_("bad or irreducible absolute expression"));
4839 exp
->X_add_number
= 0;
4841 return exp
->X_add_number
;
4845 get_absolute_expression (void)
4849 return get_absolute_expr (&exp
);
4852 char /* Return terminator. */
4853 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
4855 /* FIXME: val_pointer should probably be offsetT *. */
4856 *val_pointer
= (long) get_absolute_expression ();
4857 return (*input_line_pointer
++);
4860 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
4861 Give a warning if that happens. */
4864 demand_copy_C_string (int *len_pointer
)
4868 if ((s
= demand_copy_string (len_pointer
)) != 0)
4872 for (len
= *len_pointer
; len
> 0; len
--)
4879 as_bad (_("this string may not contain \'\\0\'"));
4887 /* Demand string, but return a safe (=private) copy of the string.
4888 Return NULL if we can't read a string here. */
4891 demand_copy_string (int *lenP
)
4893 register unsigned int c
;
4899 if (*input_line_pointer
== '\"')
4901 input_line_pointer
++; /* Skip opening quote. */
4903 while (is_a_char (c
= next_char_of_string ()))
4905 obstack_1grow (¬es
, c
);
4908 /* JF this next line is so demand_copy_C_string will return a
4909 null terminated string. */
4910 obstack_1grow (¬es
, '\0');
4911 retval
= obstack_finish (¬es
);
4915 as_bad (_("missing string"));
4917 ignore_rest_of_line ();
4923 /* In: Input_line_pointer->next character.
4925 Do: Skip input_line_pointer over all whitespace.
4927 Out: 1 if input_line_pointer->end-of-line. */
4930 is_it_end_of_statement (void)
4933 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
4937 equals (char *sym_name
, int reassign
)
4942 input_line_pointer
++;
4943 if (*input_line_pointer
== '=')
4944 input_line_pointer
++;
4946 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
4947 input_line_pointer
++;
4950 stop
= mri_comment_field (&stopc
);
4952 assign_symbol (sym_name
, !reassign
);
4956 demand_empty_rest_of_line ();
4957 mri_comment_end (stop
, stopc
);
4961 /* .incbin -- include a file verbatim at the current location. */
4964 s_incbin (int x ATTRIBUTE_UNUSED
)
4975 #ifdef md_flush_pending_output
4976 md_flush_pending_output ();
4980 filename
= demand_copy_string (& len
);
4981 if (filename
== NULL
)
4986 /* Look for optional skip and count. */
4987 if (* input_line_pointer
== ',')
4989 ++ input_line_pointer
;
4990 skip
= get_absolute_expression ();
4994 if (* input_line_pointer
== ',')
4996 ++ input_line_pointer
;
4998 count
= get_absolute_expression ();
5000 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
5006 demand_empty_rest_of_line ();
5008 /* Try opening absolute path first, then try include dirs. */
5009 binfile
= fopen (filename
, FOPEN_RB
);
5010 if (binfile
== NULL
)
5014 path
= xmalloc ((unsigned long) len
+ include_dir_maxlen
+ 5);
5016 for (i
= 0; i
< include_dir_count
; i
++)
5018 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
5020 binfile
= fopen (path
, FOPEN_RB
);
5021 if (binfile
!= NULL
)
5025 if (binfile
== NULL
)
5026 as_bad (_("file not found: %s"), filename
);
5029 path
= xstrdup (filename
);
5035 register_dependency (path
);
5037 /* Compute the length of the file. */
5038 if (fseek (binfile
, 0, SEEK_END
) != 0)
5040 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
5043 file_len
= ftell (binfile
);
5045 /* If a count was not specified use the remainder of the file. */
5047 count
= file_len
- skip
;
5049 if (skip
< 0 || count
< 0 || file_len
< 0 || skip
+ count
> file_len
)
5051 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5052 skip
, count
, file_len
);
5056 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
5058 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
5062 /* Allocate frag space and store file contents in it. */
5063 binfrag
= frag_more (count
);
5065 bytes
= fread (binfrag
, 1, count
, binfile
);
5067 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5068 path
, bytes
, count
);
5071 if (binfile
!= NULL
)
5077 /* .include -- include a file at this point. */
5080 s_include (int arg ATTRIBUTE_UNUSED
)
5089 filename
= demand_copy_string (&i
);
5090 if (filename
== NULL
)
5092 /* demand_copy_string has already printed an error and
5093 called ignore_rest_of_line. */
5101 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
5102 && *input_line_pointer
!= ' '
5103 && *input_line_pointer
!= '\t')
5105 obstack_1grow (¬es
, *input_line_pointer
);
5106 ++input_line_pointer
;
5110 obstack_1grow (¬es
, '\0');
5111 filename
= obstack_finish (¬es
);
5112 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5113 ++input_line_pointer
;
5116 demand_empty_rest_of_line ();
5117 path
= xmalloc ((unsigned long) i
+ include_dir_maxlen
+ 5 /* slop */ );
5119 for (i
= 0; i
< include_dir_count
; i
++)
5121 strcpy (path
, include_dirs
[i
]);
5123 strcat (path
, filename
);
5124 if (0 != (try = fopen (path
, FOPEN_RT
)))
5134 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5135 register_dependency (path
);
5136 input_scrub_insert_file (path
);
5140 add_include_dir (char *path
)
5144 if (include_dir_count
== 0)
5146 include_dirs
= (char **) xmalloc (2 * sizeof (*include_dirs
));
5147 include_dirs
[0] = "."; /* Current dir. */
5148 include_dir_count
= 2;
5152 include_dir_count
++;
5154 (char **) realloc (include_dirs
,
5155 include_dir_count
* sizeof (*include_dirs
));
5158 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
5161 if (i
> include_dir_maxlen
)
5162 include_dir_maxlen
= i
;
5165 /* Output debugging information to denote the source file. */
5168 generate_file_debug (void)
5170 if (debug_type
== DEBUG_STABS
)
5171 stabs_generate_asm_file ();
5174 /* Output line number debugging information for the current source line. */
5177 generate_lineno_debug (void)
5181 case DEBUG_UNSPECIFIED
:
5186 stabs_generate_asm_lineno ();
5189 ecoff_generate_asm_lineno ();
5192 /* ??? We could here indicate to dwarf2dbg.c that something
5193 has changed. However, since there is additional backend
5194 support that is required (calling dwarf2_emit_insn), we
5195 let dwarf2dbg.c call as_where on its own. */
5200 /* Output debugging information to mark a function entry point or end point.
5201 END_P is zero for .func, and non-zero for .endfunc. */
5206 do_s_func (end_p
, NULL
);
5209 /* Subroutine of s_func so targets can choose a different default prefix.
5210 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5213 do_s_func (int end_p
, const char *default_prefix
)
5215 /* Record the current function so that we can issue an error message for
5216 misplaced .func,.endfunc, and also so that .endfunc needs no
5218 static char *current_name
;
5219 static char *current_label
;
5223 if (current_name
== NULL
)
5225 as_bad (_("missing .func"));
5226 ignore_rest_of_line ();
5230 if (debug_type
== DEBUG_STABS
)
5231 stabs_generate_asm_endfunc (current_name
, current_label
);
5233 current_name
= current_label
= NULL
;
5238 char delim1
, delim2
;
5240 if (current_name
!= NULL
)
5242 as_bad (_(".endfunc missing for previous .func"));
5243 ignore_rest_of_line ();
5247 name
= input_line_pointer
;
5248 delim1
= get_symbol_end ();
5249 name
= xstrdup (name
);
5250 *input_line_pointer
= delim1
;
5252 if (*input_line_pointer
!= ',')
5255 asprintf (&label
, "%s%s", default_prefix
, name
);
5258 char leading_char
= 0;
5259 #ifdef BFD_ASSEMBLER
5260 leading_char
= bfd_get_symbol_leading_char (stdoutput
);
5262 /* Missing entry point, use function's name with the leading
5265 asprintf (&label
, "%c%s", leading_char
, name
);
5272 ++input_line_pointer
;
5274 label
= input_line_pointer
;
5275 delim2
= get_symbol_end ();
5276 label
= xstrdup (label
);
5277 *input_line_pointer
= delim2
;
5280 if (debug_type
== DEBUG_STABS
)
5281 stabs_generate_asm_func (name
, label
);
5283 current_name
= name
;
5284 current_label
= label
;
5287 demand_empty_rest_of_line ();
5291 s_ignore (int arg ATTRIBUTE_UNUSED
)
5293 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5295 ++input_line_pointer
;
5297 ++input_line_pointer
;
5301 read_print_statistics (FILE *file
)
5303 hash_print_statistics (file
, "pseudo-op table", po_hash
);
5306 /* Inserts the given line into the input stream.
5308 This call avoids macro/conditionals nesting checking, since the contents of
5309 the line are assumed to replace the contents of a line already scanned.
5311 An appropriate use of this function would be substitution of input lines when
5312 called by md_start_line_hook(). The given line is assumed to already be
5313 properly scrubbed. */
5316 input_scrub_insert_line (const char *line
)
5320 sb_add_string (&newline
, line
);
5321 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
5323 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5326 /* Insert a file into the input stream; the path must resolve to an actual
5327 file; no include path searching or dependency registering is performed. */
5330 input_scrub_insert_file (char *path
)
5332 input_scrub_include_file (path
, input_line_pointer
);
5333 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);