1 /* read.c - read a source file -
2 Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
3 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
4 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
23 /* If your chars aren't 8 bits, you will change this a bit (eg. to 0xFF).
24 But then, GNU isn't spozed to run on your machine anyway.
25 (RMS is so shortsighted sometimes.) */
26 #define MASK_CHAR ((int)(unsigned char) -1)
28 /* This is the largest known floating point format (for now). It will
29 grow when we do 4361 style flonums. */
30 #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
32 /* Routines that read assembler source text to build spaghetti in memory.
33 Another group of these functions is in the expr.c module. */
36 #include "safe-ctype.h"
43 #include "dw2gencfi.h"
45 #ifndef TC_START_LABEL
46 #define TC_START_LABEL(x,y) (x == ':')
49 /* Set by the object-format or the target. */
50 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
51 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
56 else if ((SIZE) >= 4) \
58 else if ((SIZE) >= 2) \
66 char *input_line_pointer
; /*->next char of source file to parse. */
68 #if BITS_PER_CHAR != 8
69 /* The following table is indexed by[(char)] and will break if
70 a char does not have exactly 256 states (hopefully 0:255!)! */
79 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
84 /* The Delta 68k assembler permits % inside label names. */
89 /* The PowerPC Windows NT assemblers permits ? inside label names. */
94 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
95 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
104 /* The Delta 68k assembler permits ~ at start of label names. */
108 /* Used by is_... macros. our ctype[]. */
109 char lex_type
[256] = {
110 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
111 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
112 0, 0, 0, LEX_HASH
, LEX_DOLLAR
, LEX_PCT
, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
113 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM
, /* 0123456789:;<=>? */
114 LEX_AT
, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
115 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, 0, 3, /* PQRSTUVWXYZ[\]^_ */
116 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
117 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, LEX_TILDE
, 0, /* pqrstuvwxyz{|}~. */
118 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
119 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
120 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
121 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
122 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
123 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
124 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
125 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
129 Out: 1 if this character ends a line. */
130 char is_end_of_line
[256] = {
132 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
134 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
136 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
137 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
140 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
141 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
142 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
143 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
144 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
145 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
146 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
147 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
148 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
150 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
153 #ifndef TC_CASE_SENSITIVE
154 char original_case_string
[128];
157 /* Functions private to this file. */
159 static char *buffer
; /* 1st char of each buffer of lines is here. */
160 static char *buffer_limit
; /*->1 + last char in buffer. */
162 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
163 in the tc-<CPU>.h file. See the "Porting GAS" section of the
165 int target_big_endian
= TARGET_BYTES_BIG_ENDIAN
;
167 /* Variables for handling include file directory table. */
169 /* Table of pointers to directories to search for .include's. */
172 /* How many are in the table. */
173 int include_dir_count
;
175 /* Length of longest in table. */
176 int include_dir_maxlen
= 1;
178 #ifndef WORKING_DOT_WORD
179 struct broken_word
*broken_words
;
180 int new_broken_words
;
183 /* The current offset into the absolute section. We don't try to
184 build frags in the absolute section, since no data can be stored
185 there. We just keep track of the current offset. */
186 addressT abs_section_offset
;
188 /* If this line had an MRI style label, it is stored in this variable.
189 This is used by some of the MRI pseudo-ops. */
192 /* This global variable is used to support MRI common sections. We
193 translate such sections into a common symbol. This variable is
194 non-NULL when we are in an MRI common section. */
195 symbolS
*mri_common_symbol
;
197 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
198 need to align to an even byte boundary unless the next pseudo-op is
199 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
201 static int mri_pending_align
;
205 /* This variable is set to be non-zero if the next string we see might
206 be the name of the source file in DWARF debugging information. See
207 the comment in emit_expr for the format we look for. */
208 static int dwarf_file_string
;
212 static void do_s_func (int end_p
, const char *default_prefix
);
213 static void do_align (int, char *, int, int);
214 static void s_align (int, int);
215 static void s_altmacro (int);
216 static void s_bad_end (int);
217 static int hex_float (int, char *);
218 static segT
get_known_segmented_expression (expressionS
* expP
);
219 static void pobegin (void);
220 static int get_line_sb (sb
*);
221 static void generate_file_debug (void);
222 static char *_find_end_of_line (char *, int, int);
230 obj_read_begin_hook ();
232 /* Something close -- but not too close -- to a multiple of 1024.
233 The debugging malloc I'm using has 24 bytes of overhead. */
234 obstack_begin (¬es
, chunksize
);
235 obstack_begin (&cond_obstack
, chunksize
);
237 /* Use machine dependent syntax. */
238 for (p
= line_separator_chars
; *p
; p
++)
239 is_end_of_line
[(unsigned char) *p
] = 1;
240 /* Use more. FIXME-SOMEDAY. */
246 #ifndef TC_ADDRESS_BYTES
247 #define TC_ADDRESS_BYTES address_bytes
252 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
253 contain an address. */
254 int n
= (stdoutput
->arch_info
->bits_per_address
- 1) / 8;
262 /* Set up pseudo-op tables. */
264 static struct hash_control
*po_hash
;
266 static const pseudo_typeS potable
[] = {
267 {"abort", s_abort
, 0},
268 {"align", s_align_ptwo
, 0},
269 {"altmacro", s_altmacro
, 1},
270 {"ascii", stringer
, 0},
271 {"asciz", stringer
, 1},
272 {"balign", s_align_bytes
, 0},
273 {"balignw", s_align_bytes
, -2},
274 {"balignl", s_align_bytes
, -4},
278 {"common", s_mri_common
, 0},
279 {"common.s", s_mri_common
, 1},
282 #ifdef TC_ADDRESS_BYTES
286 {"dc.d", float_cons
, 'd'},
288 {"dc.s", float_cons
, 'f'},
290 {"dc.x", float_cons
, 'x'},
292 {"dcb.b", s_space
, 1},
293 {"dcb.d", s_float_space
, 'd'},
294 {"dcb.l", s_space
, 4},
295 {"dcb.s", s_float_space
, 'f'},
296 {"dcb.w", s_space
, 2},
297 {"dcb.x", s_float_space
, 'x'},
299 {"ds.b", s_space
, 1},
300 {"ds.d", s_space
, 8},
301 {"ds.l", s_space
, 4},
302 {"ds.p", s_space
, 12},
303 {"ds.s", s_space
, 4},
304 {"ds.w", s_space
, 2},
305 {"ds.x", s_space
, 12},
306 {"debug", s_ignore
, 0},
311 {"double", float_cons
, 'd'},
313 {"eject", listing_eject
, 0}, /* Formfeed listing. */
315 {"elsec", s_else
, 0},
316 {"elseif", s_elseif
, (int) O_ne
},
318 {"endc", s_endif
, 0},
319 {"endfunc", s_func
, 1},
320 {"endif", s_endif
, 0},
321 {"endm", s_bad_end
, 0},
322 {"endr", s_bad_end
, 1},
327 {"error", s_errwarn
, 1},
328 {"exitm", s_mexit
, 0},
330 {"extern", s_ignore
, 0}, /* We treat all undef as ext. */
331 {"appfile", s_app_file
, 1},
332 {"appline", s_app_line
, 0},
334 {"file", s_app_file
, 0},
336 {"float", float_cons
, 'f'},
337 {"format", s_ignore
, 0},
339 {"global", s_globl
, 0},
340 {"globl", s_globl
, 0},
342 {"if", s_if
, (int) O_ne
},
345 {"ifdef", s_ifdef
, 0},
346 {"ifeq", s_if
, (int) O_eq
},
347 {"ifeqs", s_ifeqs
, 0},
348 {"ifge", s_if
, (int) O_ge
},
349 {"ifgt", s_if
, (int) O_gt
},
350 {"ifle", s_if
, (int) O_le
},
351 {"iflt", s_if
, (int) O_lt
},
354 {"ifndef", s_ifdef
, 1},
355 {"ifne", s_if
, (int) O_ne
},
356 {"ifnes", s_ifeqs
, 1},
357 {"ifnotdef", s_ifdef
, 1},
358 {"incbin", s_incbin
, 0},
359 {"include", s_include
, 0},
365 {"lcomm", s_lcomm
, 0},
366 {"lflags", listing_flags
, 0}, /* Listing flags. */
367 {"linkonce", s_linkonce
, 0},
368 {"list", listing_list
, 1}, /* Turn listing on. */
369 {"llen", listing_psize
, 1},
372 {"macro", s_macro
, 0},
373 {"mexit", s_mexit
, 0},
375 {".mri", s_mri
, 0}, /* Special case so .mri works in MRI mode. */
376 {"name", s_ignore
, 0},
377 {"noaltmacro", s_altmacro
, 0},
378 {"noformat", s_ignore
, 0},
379 {"nolist", listing_list
, 0}, /* Turn listing off. */
380 {"nopage", listing_nopage
, 0},
382 {"offset", s_struct
, 0},
384 {"p2align", s_align_ptwo
, 0},
385 {"p2alignw", s_align_ptwo
, -2},
386 {"p2alignl", s_align_ptwo
, -4},
387 {"page", listing_eject
, 0},
388 {"plen", listing_psize
, 0},
389 {"print", s_print
, 0},
390 {"psize", listing_psize
, 0}, /* Set paper size. */
391 {"purgem", s_purgem
, 0},
396 {"sbttl", listing_title
, 1}, /* Subtitle of listing. */
401 {"single", float_cons
, 'f'},
403 {"space", s_space
, 0},
404 {"skip", s_space
, 0},
405 {"sleb128", s_leb128
, 1},
406 {"spc", s_ignore
, 0},
407 {"stabd", s_stab
, 'd'},
408 {"stabn", s_stab
, 'n'},
409 {"stabs", s_stab
, 's'},
410 {"string", stringer
, 1},
411 {"struct", s_struct
, 0},
415 /* This is for gcc to use. It's only just been added (2/94), so gcc
416 won't be able to use it for a while -- probably a year or more.
417 But once this has been released, check with gcc maintainers
418 before deleting it or even changing the spelling. */
419 {"this_GCC_requires_the_GNU_assembler", s_ignore
, 0},
420 /* If we're folding case -- done for some targets, not necessarily
421 all -- the above string in an input file will be converted to
422 this one. Match it either way... */
423 {"this_gcc_requires_the_gnu_assembler", s_ignore
, 0},
425 {"title", listing_title
, 0}, /* Listing title. */
426 {"ttl", listing_title
, 0},
428 {"uleb128", s_leb128
, 0},
432 {"xdef", s_globl
, 0},
433 {"xref", s_ignore
, 0},
434 {"xstabs", s_xstab
, 's'},
435 {"warning", s_errwarn
, 0},
437 {"zero", s_space
, 0},
438 {NULL
, NULL
, 0} /* End sentinel. */
442 get_absolute_expr (expressionS
*exp
)
445 if (exp
->X_op
!= O_constant
)
447 if (exp
->X_op
!= O_absent
)
448 as_bad (_("bad or irreducible absolute expression"));
449 exp
->X_add_number
= 0;
451 return exp
->X_add_number
;
455 get_absolute_expression (void)
459 return get_absolute_expr (&exp
);
462 static int pop_override_ok
= 0;
463 static const char *pop_table_name
;
466 pop_insert (const pseudo_typeS
*table
)
469 const pseudo_typeS
*pop
;
470 for (pop
= table
; pop
->poc_name
; pop
++)
472 errtxt
= hash_insert (po_hash
, pop
->poc_name
, (char *) pop
);
473 if (errtxt
&& (!pop_override_ok
|| strcmp (errtxt
, "exists")))
474 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name
,
479 #ifndef md_pop_insert
480 #define md_pop_insert() pop_insert(md_pseudo_table)
483 #ifndef obj_pop_insert
484 #define obj_pop_insert() pop_insert(obj_pseudo_table)
487 #ifndef cfi_pop_insert
488 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
494 po_hash
= hash_new ();
496 /* Do the target-specific pseudo ops. */
497 pop_table_name
= "md";
500 /* Now object specific. Skip any that were in the target table. */
501 pop_table_name
= "obj";
505 /* Now portable ones. Skip any that we've seen already. */
506 pop_table_name
= "standard";
507 pop_insert (potable
);
509 #ifdef TARGET_USE_CFIPOP
510 pop_table_name
= "cfi";
516 #define HANDLE_CONDITIONAL_ASSEMBLY() \
517 if (ignore_input ()) \
519 char *eol = find_end_of_line (input_line_pointer, flag_m68k_mri); \
520 input_line_pointer = (input_line_pointer <= buffer_limit \
521 && eol >= buffer_limit) \
527 /* This function is used when scrubbing the characters between #APP
530 static char *scrub_string
;
531 static char *scrub_string_end
;
534 scrub_from_string (char *buf
, int buflen
)
538 copy
= scrub_string_end
- scrub_string
;
541 memcpy (buf
, scrub_string
, copy
);
542 scrub_string
+= copy
;
546 /* Helper function of read_a_source_file, which tries to expand a macro. */
548 try_macro (char term
, const char *line
)
554 if (check_macro (line
, &out
, &err
, ¯o
))
558 *input_line_pointer
++ = term
;
559 input_scrub_include_sb (&out
,
560 input_line_pointer
, 1);
563 input_scrub_next_buffer (&input_line_pointer
);
565 md_macro_info (macro
);
572 /* We read the file, putting things into a web that represents what we
573 have been reading. */
575 read_a_source_file (char *name
)
578 register char *s
; /* String of symbol, '\0' appended. */
586 buffer
= input_scrub_new_file (name
);
589 listing_newline (NULL
);
590 register_dependency (name
);
592 /* Generate debugging information before we've read anything in to denote
593 this file as the "main" source file and not a subordinate one
594 (e.g. N_SO vs N_SOL in stabs). */
595 generate_file_debug ();
597 while ((buffer_limit
= input_scrub_next_buffer (&input_line_pointer
)) != 0)
598 { /* We have another line to parse. */
600 /* In order to avoid listing macro expansion lines with labels
601 multiple times, keep track of which line was last issued. */
602 static char *last_eol
;
606 know (buffer_limit
[-1] == '\n'); /* Must have a sentinel. */
608 while (input_line_pointer
< buffer_limit
)
610 /* We have more of this buffer to parse. */
612 /* We now have input_line_pointer->1st char of next line.
613 If input_line_pointer [-1] == '\n' then we just
614 scanned another line: so bump line counters. */
615 if (is_end_of_line
[(unsigned char) input_line_pointer
[-1]])
617 #ifdef md_start_line_hook
618 md_start_line_hook ();
620 if (input_line_pointer
[-1] == '\n')
621 bump_line_counters ();
625 if (LABELS_WITHOUT_COLONS
|| flag_m68k_mri
)
627 /* Text at the start of a line must be a label, we
628 run down and stick a colon in. */
629 if (is_name_beginner (*input_line_pointer
))
631 char *line_start
= input_line_pointer
;
636 HANDLE_CONDITIONAL_ASSEMBLY ();
638 c
= get_symbol_end ();
640 /* In MRI mode, the EQU and MACRO pseudoops must
641 be handled specially. */
645 char *rest
= input_line_pointer
+ 1;
649 if (*rest
== ' ' || *rest
== '\t')
651 if ((strncasecmp (rest
, "EQU", 3) == 0
652 || strncasecmp (rest
, "SET", 3) == 0)
653 && (rest
[3] == ' ' || rest
[3] == '\t'))
655 input_line_pointer
= rest
+ 3;
657 strncasecmp (rest
, "SET", 3) == 0);
660 if (strncasecmp (rest
, "MACRO", 5) == 0
663 || is_end_of_line
[(unsigned char) rest
[5]]))
667 /* In MRI mode, we need to handle the MACRO
668 pseudo-op specially: we don't want to put the
669 symbol in the symbol table. */
671 #ifdef TC_START_LABEL_WITHOUT_COLON
672 && TC_START_LABEL_WITHOUT_COLON(c
,
676 line_label
= colon (line_start
);
678 line_label
= symbol_create (line_start
,
683 *input_line_pointer
= c
;
685 input_line_pointer
++;
690 /* We are at the beginning of a line, or similar place.
691 We expect a well-formed assembler statement.
692 A "symbol-name:" is a statement.
694 Depending on what compiler is used, the order of these tests
695 may vary to catch most common case 1st.
696 Each test is independent of all other tests at the (top) level.
697 PLEASE make a compiler that doesn't use this assembler.
698 It is crufty to waste a compiler's time encoding things for this
699 assembler, which then wastes more time decoding it.
700 (And communicating via (linear) files is silly!
701 If you must pass stuff, please pass a tree!) */
702 if ((c
= *input_line_pointer
++) == '\t'
706 c
= *input_line_pointer
++;
708 know (c
!= ' '); /* No further leading whitespace. */
711 /* If listing is on, and we are expanding a macro, then give
712 the listing code the contents of the expanded line. */
715 if ((listing
& LISTING_MACEXP
) && macro_nest
> 0)
720 /* Find the end of the current expanded macro line. */
721 s
= find_end_of_line (input_line_pointer
- 1, flag_m68k_mri
);
726 /* Copy it for safe keeping. Also give an indication of
727 how much macro nesting is involved at this point. */
728 len
= s
- (input_line_pointer
- 1);
729 copy
= (char *) xmalloc (len
+ macro_nest
+ 2);
730 memset (copy
, '>', macro_nest
);
731 copy
[macro_nest
] = ' ';
732 memcpy (copy
+ macro_nest
+ 1, input_line_pointer
- 1, len
);
733 copy
[macro_nest
+ 1 + len
] = '\0';
735 /* Install the line with the listing facility. */
736 listing_newline (copy
);
740 listing_newline (NULL
);
743 /* C is the 1st significant character.
744 Input_line_pointer points after that character. */
745 if (is_name_beginner (c
))
747 /* Want user-defined label or pseudo/opcode. */
748 HANDLE_CONDITIONAL_ASSEMBLY ();
750 s
= --input_line_pointer
;
751 c
= get_symbol_end (); /* name's delimiter. */
753 /* C is character after symbol.
754 That character's place in the input line is now '\0'.
755 S points to the beginning of the symbol.
756 [In case of pseudo-op, s->'.'.]
757 Input_line_pointer->'\0' where c was. */
758 if (TC_START_LABEL (c
, input_line_pointer
))
762 char *rest
= input_line_pointer
+ 1;
764 /* In MRI mode, \tsym: set 0 is permitted. */
768 if (*rest
== ' ' || *rest
== '\t')
771 if ((strncasecmp (rest
, "EQU", 3) == 0
772 || strncasecmp (rest
, "SET", 3) == 0)
773 && (rest
[3] == ' ' || rest
[3] == '\t'))
775 input_line_pointer
= rest
+ 3;
781 line_label
= colon (s
); /* User-defined label. */
782 /* Put ':' back for error messages' sake. */
783 *input_line_pointer
++ = ':';
784 #ifdef tc_check_label
785 tc_check_label (line_label
);
787 /* Input_line_pointer->after ':'. */
791 || ((c
== ' ' || c
== '\t')
792 && input_line_pointer
[1] == '='))
793 #ifdef TC_EQUAL_IN_INSN
794 && !TC_EQUAL_IN_INSN (c
, s
)
799 demand_empty_rest_of_line ();
803 /* Expect pseudo-op or machine instruction. */
806 #ifndef TC_CASE_SENSITIVE
810 strncpy (original_case_string
, s2
, sizeof (original_case_string
));
811 original_case_string
[sizeof (original_case_string
) - 1] = 0;
820 if (NO_PSEUDO_DOT
|| flag_m68k_mri
)
822 /* The MRI assembler uses pseudo-ops without
824 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
);
825 if (pop
!= NULL
&& pop
->poc_handler
== NULL
)
830 || (!flag_m68k_mri
&& *s
== '.'))
834 WARNING: c has next char, which may be end-of-line.
835 We lookup the pseudo-op table with s+1 because we
836 already know that the pseudo-op begins with a '.'. */
839 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
+ 1);
840 if (pop
&& !pop
->poc_handler
)
843 /* In MRI mode, we may need to insert an
844 automatic alignment directive. What a hack
846 if (mri_pending_align
848 || !((pop
->poc_handler
== cons
849 && pop
->poc_val
== 1)
850 || (pop
->poc_handler
== s_space
851 && pop
->poc_val
== 1)
852 #ifdef tc_conditional_pseudoop
853 || tc_conditional_pseudoop (pop
)
855 || pop
->poc_handler
== s_if
856 || pop
->poc_handler
== s_ifdef
857 || pop
->poc_handler
== s_ifc
858 || pop
->poc_handler
== s_ifeqs
859 || pop
->poc_handler
== s_else
860 || pop
->poc_handler
== s_endif
861 || pop
->poc_handler
== s_globl
862 || pop
->poc_handler
== s_ignore
)))
864 do_align (1, (char *) NULL
, 0, 0);
865 mri_pending_align
= 0;
867 if (line_label
!= NULL
)
869 symbol_set_frag (line_label
, frag_now
);
870 S_SET_VALUE (line_label
, frag_now_fix ());
874 /* Print the error msg now, while we still can. */
877 char *end
= input_line_pointer
;
879 *input_line_pointer
= c
;
881 c
= *--input_line_pointer
;
882 *input_line_pointer
= '\0';
883 if (! macro_defined
|| ! try_macro (c
, s
))
886 as_bad (_("unknown pseudo-op: `%s'"), s
);
887 *input_line_pointer
++ = c
;
892 /* Put it back for error messages etc. */
893 *input_line_pointer
= c
;
894 /* The following skip of whitespace is compulsory.
895 A well shaped space is sometimes all that separates
896 keyword from operands. */
897 if (c
== ' ' || c
== '\t')
898 input_line_pointer
++;
900 /* Input_line is restored.
901 Input_line_pointer->1st non-blank char
902 after pseudo-operation. */
903 (*pop
->poc_handler
) (pop
->poc_val
);
905 /* If that was .end, just get out now. */
906 if (pop
->poc_handler
== s_end
)
911 /* WARNING: c has char, which may be end-of-line. */
912 /* Also: input_line_pointer->`\0` where c was. */
913 *input_line_pointer
= c
;
914 input_line_pointer
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 1);
915 c
= *input_line_pointer
;
916 *input_line_pointer
= '\0';
918 generate_lineno_debug ();
920 if (macro_defined
&& try_macro (c
, s
))
923 if (mri_pending_align
)
925 do_align (1, (char *) NULL
, 0, 0);
926 mri_pending_align
= 0;
927 if (line_label
!= NULL
)
929 symbol_set_frag (line_label
, frag_now
);
930 S_SET_VALUE (line_label
, frag_now_fix ());
934 md_assemble (s
); /* Assemble 1 instruction. */
936 *input_line_pointer
++ = c
;
938 /* We resume loop AFTER the end-of-line from
945 /* Empty statement? */
946 if (is_end_of_line
[(unsigned char) c
])
949 if ((LOCAL_LABELS_DOLLAR
|| LOCAL_LABELS_FB
) && ISDIGIT (c
))
951 /* local label ("4:") */
952 char *backup
= input_line_pointer
;
954 HANDLE_CONDITIONAL_ASSEMBLY ();
958 /* Read the whole number. */
959 while (ISDIGIT (*input_line_pointer
))
961 temp
= (temp
* 10) + *input_line_pointer
- '0';
962 ++input_line_pointer
;
965 if (LOCAL_LABELS_DOLLAR
966 && *input_line_pointer
== '$'
967 && *(input_line_pointer
+ 1) == ':')
969 input_line_pointer
+= 2;
971 if (dollar_label_defined (temp
))
973 as_fatal (_("label \"%d$\" redefined"), temp
);
976 define_dollar_label (temp
);
977 colon (dollar_label_name (temp
, 0));
982 && *input_line_pointer
++ == ':')
984 fb_label_instance_inc (temp
);
985 colon (fb_label_name (temp
, 0));
989 input_line_pointer
= backup
;
990 } /* local label ("4:") */
992 if (c
&& strchr (line_comment_chars
, c
))
993 { /* Its a comment. Better say APP or NO_APP. */
998 unsigned int new_length
;
1001 bump_line_counters ();
1002 s
= input_line_pointer
;
1003 if (strncmp (s
, "APP\n", 4))
1004 continue; /* We ignore it */
1008 ends
= strstr (s
, "#NO_APP\n");
1012 unsigned int tmp_len
;
1015 /* The end of the #APP wasn't in this buffer. We
1016 keep reading in buffers until we find the #NO_APP
1017 that goes with this #APP There is one. The specs
1019 tmp_len
= buffer_limit
- s
;
1020 tmp_buf
= xmalloc (tmp_len
+ 1);
1021 memcpy (tmp_buf
, s
, tmp_len
);
1024 new_tmp
= input_scrub_next_buffer (&buffer
);
1028 buffer_limit
= new_tmp
;
1029 input_line_pointer
= buffer
;
1030 ends
= strstr (buffer
, "#NO_APP\n");
1032 num
= ends
- buffer
;
1034 num
= buffer_limit
- buffer
;
1036 tmp_buf
= xrealloc (tmp_buf
, tmp_len
+ num
);
1037 memcpy (tmp_buf
+ tmp_len
, buffer
, num
);
1042 input_line_pointer
= ends
? ends
+ 8 : NULL
;
1050 input_line_pointer
= ends
+ 8;
1054 scrub_string_end
= ends
;
1056 new_length
= ends
- s
;
1057 new_buf
= (char *) xmalloc (new_length
);
1064 space
= (new_buf
+ new_length
) - new_tmp
;
1065 size
= do_scrub_chars (scrub_from_string
, new_tmp
, space
);
1073 new_buf
= xrealloc (new_buf
, new_length
+ 100);
1074 new_tmp
= new_buf
+ new_length
;
1081 /* We've "scrubbed" input to the preferred format. In the
1082 process we may have consumed the whole of the remaining
1083 file (and included files). We handle this formatted
1084 input similar to that of macro expansion, letting
1085 actual macro expansion (possibly nested) and other
1086 input expansion work. Beware that in messages, line
1087 numbers and possibly file names will be incorrect. */
1088 sb_add_string (&sbuf
, new_buf
);
1089 input_scrub_include_sb (&sbuf
, input_line_pointer
, 0);
1091 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1096 HANDLE_CONDITIONAL_ASSEMBLY ();
1098 #ifdef tc_unrecognized_line
1099 if (tc_unrecognized_line (c
))
1102 input_line_pointer
--;
1103 /* Report unknown char as ignored. */
1104 demand_empty_rest_of_line ();
1107 #ifdef md_after_pass_hook
1108 md_after_pass_hook ();
1117 /* Close the input file. */
1118 input_scrub_close ();
1119 #ifdef WARN_COMMENTS
1121 if (warn_comment
&& found_comment
)
1122 as_warn_where (found_comment_file
, found_comment
,
1123 "first comment found here");
1128 /* Convert O_constant expression EXP into the equivalent O_big representation.
1129 Take the sign of the number from X_unsigned rather than X_add_number. */
1132 convert_to_bignum (expressionS
*exp
)
1137 value
= exp
->X_add_number
;
1138 for (i
= 0; i
< sizeof (exp
->X_add_number
) / CHARS_PER_LITTLENUM
; i
++)
1140 generic_bignum
[i
] = value
& LITTLENUM_MASK
;
1141 value
>>= LITTLENUM_NUMBER_OF_BITS
;
1143 /* Add a sequence of sign bits if the top bit of X_add_number is not
1144 the sign of the original value. */
1145 if ((exp
->X_add_number
< 0) != !exp
->X_unsigned
)
1146 generic_bignum
[i
++] = exp
->X_unsigned
? 0 : LITTLENUM_MASK
;
1148 exp
->X_add_number
= i
;
1151 /* For most MRI pseudo-ops, the line actually ends at the first
1152 nonquoted space. This function looks for that point, stuffs a null
1153 in, and sets *STOPCP to the character that used to be there, and
1154 returns the location.
1156 Until I hear otherwise, I am going to assume that this is only true
1157 for the m68k MRI assembler. */
1160 mri_comment_field (char *stopcp
)
1166 know (flag_m68k_mri
);
1168 for (s
= input_line_pointer
;
1169 ((!is_end_of_line
[(unsigned char) *s
] && *s
!= ' ' && *s
!= '\t')
1177 for (s
= input_line_pointer
;
1178 !is_end_of_line
[(unsigned char) *s
];
1188 /* Skip to the end of an MRI comment field. */
1191 mri_comment_end (char *stop
, int stopc
)
1195 input_line_pointer
= stop
;
1197 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1198 ++input_line_pointer
;
1202 s_abort (int ignore ATTRIBUTE_UNUSED
)
1204 as_fatal (_(".abort detected. Abandoning ship."));
1207 /* Guts of .align directive. N is the power of two to which to align.
1208 FILL may be NULL, or it may point to the bytes of the fill pattern.
1209 LEN is the length of whatever FILL points to, if anything. MAX is
1210 the maximum number of characters to skip when doing the alignment,
1211 or 0 if there is no maximum. */
1214 do_align (int n
, char *fill
, int len
, int max
)
1216 if (now_seg
== absolute_section
)
1220 if (*fill
++ != '\0')
1222 as_warn (_("ignoring fill value in absolute section"));
1229 #ifdef md_flush_pending_output
1230 md_flush_pending_output ();
1233 md_do_align (n
, fill
, len
, max
, just_record_alignment
);
1236 /* Only make a frag if we HAVE to... */
1237 if (n
!= 0 && !need_pass_2
)
1241 if (subseg_text_p (now_seg
))
1242 frag_align_code (n
, max
);
1244 frag_align (n
, 0, max
);
1247 frag_align (n
, *fill
, max
);
1249 frag_align_pattern (n
, fill
, len
, max
);
1253 just_record_alignment
: ATTRIBUTE_UNUSED_LABEL
1256 record_alignment (now_seg
, n
- OCTETS_PER_BYTE_POWER
);
1259 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1260 (in bytes). A negative ARG is the negative of the length of the
1261 fill pattern. BYTES_P is non-zero if the alignment value should be
1262 interpreted as the byte boundary, rather than the power of 2. */
1264 #define ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1267 s_align (int arg
, int bytes_p
)
1269 unsigned int align_limit
= ALIGN_LIMIT
;
1278 stop
= mri_comment_field (&stopc
);
1280 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1285 align
= arg
; /* Default value from pseudo-op table. */
1289 align
= get_absolute_expression ();
1295 /* Convert to a power of 2. */
1300 for (i
= 0; (align
& 1) == 0; align
>>= 1, ++i
)
1303 as_bad (_("alignment not a power of 2"));
1309 if (align
> align_limit
)
1311 align
= align_limit
;
1312 as_warn (_("alignment too large: %u assumed"), align
);
1315 if (*input_line_pointer
!= ',')
1322 ++input_line_pointer
;
1323 if (*input_line_pointer
== ',')
1327 fill
= get_absolute_expression ();
1332 if (*input_line_pointer
!= ',')
1336 ++input_line_pointer
;
1337 max
= get_absolute_expression ();
1344 as_warn (_("expected fill pattern missing"));
1345 do_align (align
, (char *) NULL
, 0, max
);
1360 do_align (align
, &fill_char
, fill_len
, max
);
1366 if ((size_t) fill_len
> sizeof ab
)
1368 md_number_to_chars (ab
, fill
, fill_len
);
1369 do_align (align
, ab
, fill_len
, max
);
1373 demand_empty_rest_of_line ();
1376 mri_comment_end (stop
, stopc
);
1379 /* Handle the .align pseudo-op on machines where ".align 4" means
1380 align to a 4 byte boundary. */
1383 s_align_bytes (int arg
)
1388 /* Handle the .align pseudo-op on machines where ".align 4" means align
1389 to a 2**4 boundary. */
1392 s_align_ptwo (int arg
)
1397 /* Switch in and out of alternate macro mode. */
1402 demand_empty_rest_of_line ();
1403 macro_set_alternate (on
);
1407 s_comm_internal (int param
,
1408 symbolS
*(*comm_parse_extra
) (int, symbolS
*, addressT
))
1414 symbolS
*symbolP
= NULL
;
1420 stop
= mri_comment_field (&stopc
);
1422 name
= input_line_pointer
;
1423 c
= get_symbol_end ();
1424 /* Just after name is now '\0'. */
1425 p
= input_line_pointer
;
1430 as_bad (_("expected symbol name"));
1431 ignore_rest_of_line ();
1437 /* Accept an optional comma after the name. The comma used to be
1438 required, but Irix 5 cc does not generate it for .lcomm. */
1439 if (*input_line_pointer
== ',')
1440 input_line_pointer
++;
1442 temp
= get_absolute_expr (&exp
);
1444 size
&= ((offsetT
) 2 << (stdoutput
->arch_info
->bits_per_address
- 1)) - 1;
1445 if (exp
.X_op
== O_absent
)
1447 as_bad (_("missing size expression"));
1448 ignore_rest_of_line ();
1451 else if (temp
!= size
|| !exp
.X_unsigned
)
1453 as_warn (_("size (%ld) out of range, ignored"), (long) temp
);
1454 ignore_rest_of_line ();
1459 symbolP
= symbol_find_or_make (name
);
1460 if (S_IS_DEFINED (symbolP
) && !S_IS_COMMON (symbolP
))
1463 as_bad (_("symbol `%s' is already defined"), name
);
1465 ignore_rest_of_line ();
1469 size
= S_GET_VALUE (symbolP
);
1472 else if (size
!= temp
)
1473 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1474 name
, (long) size
, (long) temp
);
1477 if (comm_parse_extra
!= NULL
)
1478 symbolP
= (*comm_parse_extra
) (param
, symbolP
, size
);
1481 S_SET_VALUE (symbolP
, (valueT
) size
);
1482 S_SET_EXTERNAL (symbolP
);
1485 extern int flag_one
;
1486 if (size
== 0 || !flag_one
)
1487 S_GET_OTHER (symbolP
) = const_flag
;
1492 demand_empty_rest_of_line ();
1495 mri_comment_end (stop
, stopc
);
1502 s_comm_internal (ignore
, NULL
);
1505 /* The MRI COMMON pseudo-op. We handle this by creating a common
1506 symbol with the appropriate name. We make s_space do the right
1507 thing by increasing the size. */
1510 s_mri_common (int small ATTRIBUTE_UNUSED
)
1526 stop
= mri_comment_field (&stopc
);
1530 name
= input_line_pointer
;
1531 if (!ISDIGIT (*name
))
1532 c
= get_symbol_end ();
1537 ++input_line_pointer
;
1539 while (ISDIGIT (*input_line_pointer
));
1541 c
= *input_line_pointer
;
1542 *input_line_pointer
= '\0';
1544 if (line_label
!= NULL
)
1546 alc
= (char *) xmalloc (strlen (S_GET_NAME (line_label
))
1547 + (input_line_pointer
- name
)
1549 sprintf (alc
, "%s%s", name
, S_GET_NAME (line_label
));
1554 sym
= symbol_find_or_make (name
);
1555 *input_line_pointer
= c
;
1559 if (*input_line_pointer
!= ',')
1563 ++input_line_pointer
;
1564 align
= get_absolute_expression ();
1567 if (S_IS_DEFINED (sym
) && !S_IS_COMMON (sym
))
1569 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym
));
1570 ignore_rest_of_line ();
1571 mri_comment_end (stop
, stopc
);
1575 S_SET_EXTERNAL (sym
);
1576 mri_common_symbol
= sym
;
1580 S_SET_ALIGN (sym
, align
);
1583 if (line_label
!= NULL
)
1586 exp
.X_op
= O_symbol
;
1587 exp
.X_add_symbol
= sym
;
1588 exp
.X_add_number
= 0;
1589 symbol_set_value_expression (line_label
, &exp
);
1590 symbol_set_frag (line_label
, &zero_address_frag
);
1591 S_SET_SEGMENT (line_label
, expr_section
);
1594 /* FIXME: We just ignore the small argument, which distinguishes
1595 COMMON and COMMON.S. I don't know what we can do about it. */
1597 /* Ignore the type and hptype. */
1598 if (*input_line_pointer
== ',')
1599 input_line_pointer
+= 2;
1600 if (*input_line_pointer
== ',')
1601 input_line_pointer
+= 2;
1603 demand_empty_rest_of_line ();
1605 mri_comment_end (stop
, stopc
);
1609 s_data (int ignore ATTRIBUTE_UNUSED
)
1614 temp
= get_absolute_expression ();
1615 if (flag_readonly_data_in_text
)
1617 section
= text_section
;
1621 section
= data_section
;
1623 subseg_set (section
, (subsegT
) temp
);
1628 demand_empty_rest_of_line ();
1631 /* Handle the .appfile pseudo-op. This is automatically generated by
1632 do_scrub_chars when a preprocessor # line comment is seen with a
1633 file name. This default definition may be overridden by the object
1634 or CPU specific pseudo-ops. This function is also the default
1635 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1639 s_app_file_string (char *file
, int appfile ATTRIBUTE_UNUSED
)
1643 listing_source_file (file
);
1645 register_dependency (file
);
1647 obj_app_file (file
, appfile
);
1652 s_app_file (int appfile
)
1657 /* Some assemblers tolerate immediately following '"'. */
1658 if ((s
= demand_copy_string (&length
)) != 0)
1660 /* If this is a fake .appfile, a fake newline was inserted into
1661 the buffer. Passing -2 to new_logical_line tells it to
1664 = (!new_logical_line (s
, appfile
? -2 : -1) && appfile
);
1666 /* In MRI mode, the preprocessor may have inserted an extraneous
1669 && *input_line_pointer
== '\''
1670 && is_end_of_line
[(unsigned char) input_line_pointer
[1]])
1671 ++input_line_pointer
;
1673 demand_empty_rest_of_line ();
1675 s_app_file_string (s
, appfile
);
1679 /* Handle the .appline pseudo-op. This is automatically generated by
1680 do_scrub_chars when a preprocessor # line comment is seen. This
1681 default definition may be overridden by the object or CPU specific
1685 s_app_line (int ignore ATTRIBUTE_UNUSED
)
1689 /* The given number is that of the next line. */
1690 l
= get_absolute_expression () - 1;
1693 /* Some of the back ends can't deal with non-positive line numbers.
1694 Besides, it's silly. GCC however will generate a line number of
1695 zero when it is pre-processing builtins for assembler-with-cpp files:
1699 We do not want to barf on this, especially since such files are used
1700 in the GCC and GDB testsuites. So we check for negative line numbers
1701 rather than non-positive line numbers. */
1702 as_warn (_("line numbers must be positive; line number %d rejected"),
1706 new_logical_line ((char *) NULL
, l
);
1709 listing_source_line (l
);
1712 demand_empty_rest_of_line ();
1715 /* Handle the .end pseudo-op. Actually, the real work is done in
1716 read_a_source_file. */
1719 s_end (int ignore ATTRIBUTE_UNUSED
)
1723 /* The MRI assembler permits the start symbol to follow .end,
1724 but we don't support that. */
1726 if (!is_end_of_line
[(unsigned char) *input_line_pointer
]
1727 && *input_line_pointer
!= '*'
1728 && *input_line_pointer
!= '!')
1729 as_warn (_("start address not supported"));
1733 /* Handle the .err pseudo-op. */
1736 s_err (int ignore ATTRIBUTE_UNUSED
)
1738 as_bad (_(".err encountered"));
1739 demand_empty_rest_of_line ();
1742 /* Handle the .error and .warning pseudo-ops. */
1748 /* The purpose for the conditional assignment is not to
1749 internationalize the directive itself, but that we need a
1750 self-contained message, one that can be passed like the
1751 demand_copy_C_string return value, and with no assumption on the
1752 location of the name of the directive within the message. */
1754 = (err
? _(".error directive invoked in source file")
1755 : _(".warning directive invoked in source file"));
1757 if (!is_it_end_of_statement ())
1759 if (*input_line_pointer
!= '\"')
1761 as_bad (_("%s argument must be a string"),
1762 err
? ".error" : ".warning");
1763 ignore_rest_of_line ();
1767 msg
= demand_copy_C_string (&len
);
1775 as_warn ("%s", msg
);
1776 demand_empty_rest_of_line ();
1779 /* Handle the MRI fail pseudo-op. */
1782 s_fail (int ignore ATTRIBUTE_UNUSED
)
1789 stop
= mri_comment_field (&stopc
);
1791 temp
= get_absolute_expression ();
1793 as_warn (_(".fail %ld encountered"), (long) temp
);
1795 as_bad (_(".fail %ld encountered"), (long) temp
);
1797 demand_empty_rest_of_line ();
1800 mri_comment_end (stop
, stopc
);
1804 s_fill (int ignore ATTRIBUTE_UNUSED
)
1806 expressionS rep_exp
;
1808 register long fill
= 0;
1811 #ifdef md_flush_pending_output
1812 md_flush_pending_output ();
1815 get_known_segmented_expression (&rep_exp
);
1816 if (*input_line_pointer
== ',')
1818 input_line_pointer
++;
1819 size
= get_absolute_expression ();
1820 if (*input_line_pointer
== ',')
1822 input_line_pointer
++;
1823 fill
= get_absolute_expression ();
1827 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1828 #define BSD_FILL_SIZE_CROCK_8 (8)
1829 if (size
> BSD_FILL_SIZE_CROCK_8
)
1831 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8
);
1832 size
= BSD_FILL_SIZE_CROCK_8
;
1836 as_warn (_("size negative; .fill ignored"));
1839 else if (rep_exp
.X_op
== O_constant
&& rep_exp
.X_add_number
<= 0)
1841 if (rep_exp
.X_add_number
< 0)
1842 as_warn (_("repeat < 0; .fill ignored"));
1846 if (size
&& !need_pass_2
)
1848 if (rep_exp
.X_op
== O_constant
)
1850 p
= frag_var (rs_fill
, (int) size
, (int) size
,
1851 (relax_substateT
) 0, (symbolS
*) 0,
1852 (offsetT
) rep_exp
.X_add_number
,
1857 /* We don't have a constant repeat count, so we can't use
1858 rs_fill. We can get the same results out of rs_space,
1859 but its argument is in bytes, so we must multiply the
1860 repeat count by size. */
1863 rep_sym
= make_expr_symbol (&rep_exp
);
1866 expressionS size_exp
;
1867 size_exp
.X_op
= O_constant
;
1868 size_exp
.X_add_number
= size
;
1870 rep_exp
.X_op
= O_multiply
;
1871 rep_exp
.X_add_symbol
= rep_sym
;
1872 rep_exp
.X_op_symbol
= make_expr_symbol (&size_exp
);
1873 rep_exp
.X_add_number
= 0;
1874 rep_sym
= make_expr_symbol (&rep_exp
);
1877 p
= frag_var (rs_space
, (int) size
, (int) size
,
1878 (relax_substateT
) 0, rep_sym
, (offsetT
) 0, (char *) 0);
1881 memset (p
, 0, (unsigned int) size
);
1883 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1884 flavoured AS. The following bizarre behaviour is to be
1885 compatible with above. I guess they tried to take up to 8
1886 bytes from a 4-byte expression and they forgot to sign
1888 #define BSD_FILL_SIZE_CROCK_4 (4)
1889 md_number_to_chars (p
, (valueT
) fill
,
1890 (size
> BSD_FILL_SIZE_CROCK_4
1891 ? BSD_FILL_SIZE_CROCK_4
1893 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1894 but emits no error message because it seems a legal thing to do.
1895 It is a degenerate case of .fill but could be emitted by a
1898 demand_empty_rest_of_line ();
1902 s_globl (int ignore ATTRIBUTE_UNUSED
)
1911 stop
= mri_comment_field (&stopc
);
1915 name
= input_line_pointer
;
1916 c
= get_symbol_end ();
1917 symbolP
= symbol_find_or_make (name
);
1918 S_SET_EXTERNAL (symbolP
);
1920 *input_line_pointer
= c
;
1922 c
= *input_line_pointer
;
1925 input_line_pointer
++;
1927 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1933 demand_empty_rest_of_line ();
1936 mri_comment_end (stop
, stopc
);
1939 /* Handle the MRI IRP and IRPC pseudo-ops. */
1950 as_where (&file
, &line
);
1953 eol
= find_end_of_line (input_line_pointer
, 0);
1954 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
1955 input_line_pointer
= eol
;
1959 err
= expand_irp (irpc
, 0, &s
, &out
, get_line_sb
);
1961 as_bad_where (file
, line
, "%s", err
);
1965 input_scrub_include_sb (&out
, input_line_pointer
, 1);
1967 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1970 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
1971 the section to only be linked once. However, this is not supported
1972 by most object file formats. This takes an optional argument,
1973 which is what to do about duplicates. */
1976 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
1978 enum linkonce_type type
;
1982 type
= LINKONCE_DISCARD
;
1984 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1989 s
= input_line_pointer
;
1990 c
= get_symbol_end ();
1991 if (strcasecmp (s
, "discard") == 0)
1992 type
= LINKONCE_DISCARD
;
1993 else if (strcasecmp (s
, "one_only") == 0)
1994 type
= LINKONCE_ONE_ONLY
;
1995 else if (strcasecmp (s
, "same_size") == 0)
1996 type
= LINKONCE_SAME_SIZE
;
1997 else if (strcasecmp (s
, "same_contents") == 0)
1998 type
= LINKONCE_SAME_CONTENTS
;
2000 as_warn (_("unrecognized .linkonce type `%s'"), s
);
2002 *input_line_pointer
= c
;
2005 #ifdef obj_handle_link_once
2006 obj_handle_link_once (type
);
2007 #else /* ! defined (obj_handle_link_once) */
2011 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
2012 as_warn (_(".linkonce is not supported for this object file format"));
2014 flags
= bfd_get_section_flags (stdoutput
, now_seg
);
2015 flags
|= SEC_LINK_ONCE
;
2020 case LINKONCE_DISCARD
:
2021 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
2023 case LINKONCE_ONE_ONLY
:
2024 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
2026 case LINKONCE_SAME_SIZE
:
2027 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
2029 case LINKONCE_SAME_CONTENTS
:
2030 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
2033 if (!bfd_set_section_flags (stdoutput
, now_seg
, flags
))
2034 as_bad (_("bfd_set_section_flags: %s"),
2035 bfd_errmsg (bfd_get_error ()));
2037 #endif /* ! defined (obj_handle_link_once) */
2039 demand_empty_rest_of_line ();
2043 bss_alloc (symbolS
*symbolP
, addressT size
, int align
)
2046 segT current_seg
= now_seg
;
2047 subsegT current_subseg
= now_subseg
;
2048 segT bss_seg
= bss_section
;
2050 #if defined (TC_MIPS) || defined (TC_ALPHA)
2051 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
2052 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
2054 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2055 if (size
<= bfd_get_gp_size (stdoutput
))
2057 bss_seg
= subseg_new (".sbss", 1);
2058 seg_info (bss_seg
)->bss
= 1;
2059 if (!bfd_set_section_flags (stdoutput
, bss_seg
, SEC_ALLOC
))
2060 as_warn (_("error setting flags for \".sbss\": %s"),
2061 bfd_errmsg (bfd_get_error ()));
2065 subseg_set (bss_seg
, 1);
2069 record_alignment (bss_seg
, align
);
2070 frag_align (align
, 0, 0);
2073 /* Detach from old frag. */
2074 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2075 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2077 symbol_set_frag (symbolP
, frag_now
);
2078 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
, NULL
);
2082 S_SET_SIZE (symbolP
, size
);
2084 S_SET_SEGMENT (symbolP
, bss_seg
);
2087 /* The symbol may already have been created with a preceding
2088 ".globl" directive -- be careful not to step on storage class
2089 in that case. Otherwise, set it to static. */
2090 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2091 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2092 #endif /* OBJ_COFF */
2094 subseg_set (current_seg
, current_subseg
);
2098 parse_align (int align_bytes
)
2104 if (*input_line_pointer
!= ',')
2107 as_bad (_("expected alignment after size"));
2108 ignore_rest_of_line ();
2112 input_line_pointer
++;
2115 align
= get_absolute_expr (&exp
);
2116 if (exp
.X_op
== O_absent
)
2119 if (!exp
.X_unsigned
)
2121 as_warn (_("alignment negative; 0 assumed"));
2125 if (align_bytes
&& align
!= 0)
2127 /* convert to a power of 2 alignment */
2128 unsigned int alignp2
= 0;
2129 while ((align
& 1) == 0)
2130 align
>>= 1, ++alignp2
;
2133 as_bad (_("alignment not a power of 2"));
2134 ignore_rest_of_line ();
2142 /* Called from s_comm_internal after symbol name and size have been
2143 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2144 1 if this was a ".bss" directive which has a 3rd argument
2145 (alignment as a power of 2), or 2 if this was a ".bss" directive
2146 with alignment in bytes. */
2149 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2155 align
= parse_align (needs_align
- 1);
2156 if (align
== (addressT
) -1)
2160 /* Assume some objects may require alignment on some systems. */
2161 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2163 bss_alloc (symbolP
, size
, align
);
2168 s_lcomm (int needs_align
)
2170 s_comm_internal (needs_align
, s_lcomm_internal
);
2174 s_lcomm_bytes (int needs_align
)
2176 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2180 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2182 register char *name
;
2186 register symbolS
*symbolP
;
2188 /* We permit ANY defined expression: BSD4.2 demands constants. */
2189 name
= input_line_pointer
;
2190 c
= get_symbol_end ();
2191 p
= input_line_pointer
;
2196 as_bad (_("expected symbol name"));
2197 ignore_rest_of_line ();
2203 if (*input_line_pointer
!= ',')
2206 as_bad (_("expected comma after \"%s\""), name
);
2208 ignore_rest_of_line ();
2212 input_line_pointer
++;
2215 if (exp
.X_op
!= O_constant
2216 && exp
.X_op
!= O_register
)
2218 as_bad (_("bad expression"));
2219 ignore_rest_of_line ();
2224 symbolP
= symbol_find_or_make (name
);
2226 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
2227 symbolP->sy_desc == 0) out of this test because coff doesn't have
2228 those fields, and I can't see when they'd ever be tripped. I
2229 don't think I understand why they were here so I may have
2230 introduced a bug. As recently as 1.37 didn't have this test
2231 anyway. xoxorich. */
2233 if (S_GET_SEGMENT (symbolP
) == undefined_section
2234 && S_GET_VALUE (symbolP
) == 0)
2236 /* The name might be an undefined .global symbol; be sure to
2237 keep the "external" bit. */
2238 S_SET_SEGMENT (symbolP
,
2239 (exp
.X_op
== O_constant
2242 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2246 as_bad (_("symbol `%s' is already defined"), name
);
2250 demand_empty_rest_of_line ();
2253 /* Read a line into an sb. Returns the character that ended the line
2254 or zero if there are no more lines. */
2257 get_line_sb (sb
*line
)
2261 if (input_line_pointer
[-1] == '\n')
2262 bump_line_counters ();
2264 if (input_line_pointer
>= buffer_limit
)
2266 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2267 if (buffer_limit
== 0)
2271 eol
= find_end_of_line (input_line_pointer
, flag_m68k_mri
);
2272 sb_add_buffer (line
, input_line_pointer
, eol
- input_line_pointer
);
2273 input_line_pointer
= eol
;
2275 /* Don't skip multiple end-of-line characters, because that breaks support
2276 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2277 characters but isn't. Instead just skip one end of line character and
2278 return the character skipped so that the caller can re-insert it if
2280 return *input_line_pointer
++;
2283 /* Define a macro. This is an interface to macro.c. */
2286 s_macro (int ignore ATTRIBUTE_UNUSED
)
2294 as_where (&file
, &line
);
2297 eol
= find_end_of_line (input_line_pointer
, 0);
2298 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2299 input_line_pointer
= eol
;
2301 if (line_label
!= NULL
)
2306 sb_add_string (&label
, S_GET_NAME (line_label
));
2307 err
= define_macro (0, &s
, &label
, get_line_sb
, file
, line
, &name
);
2311 err
= define_macro (0, &s
, NULL
, get_line_sb
, file
, line
, &name
);
2313 as_bad_where (file
, line
, err
, name
);
2316 if (line_label
!= NULL
)
2318 S_SET_SEGMENT (line_label
, absolute_section
);
2319 S_SET_VALUE (line_label
, 0);
2320 symbol_set_frag (line_label
, &zero_address_frag
);
2323 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2324 && hash_find (po_hash
, name
) != NULL
)
2327 && hash_find (po_hash
, name
+ 1) != NULL
))
2328 as_warn_where (file
,
2330 _("attempt to redefine pseudo-op `%s' ignored"),
2337 /* Handle the .mexit pseudo-op, which immediately exits a macro
2341 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2343 cond_exit_macro (macro_nest
);
2344 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2347 /* Switch in and out of MRI mode. */
2350 s_mri (int ignore ATTRIBUTE_UNUSED
)
2354 on
= get_absolute_expression ();
2355 old_flag
= flag_mri
;
2373 /* Operator precedence changes in m68k MRI mode, so we need to
2374 update the operator rankings. */
2375 expr_set_precedence ();
2377 #ifdef MRI_MODE_CHANGE
2379 MRI_MODE_CHANGE (on
);
2382 demand_empty_rest_of_line ();
2385 /* Handle changing the location counter. */
2388 do_org (segT segment
, expressionS
*exp
, int fill
)
2390 if (segment
!= now_seg
&& segment
!= absolute_section
)
2391 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2393 if (now_seg
== absolute_section
)
2396 as_warn (_("ignoring fill value in absolute section"));
2397 if (exp
->X_op
!= O_constant
)
2399 as_bad (_("only constant offsets supported in absolute section"));
2400 exp
->X_add_number
= 0;
2402 abs_section_offset
= exp
->X_add_number
;
2407 symbolS
*sym
= exp
->X_add_symbol
;
2408 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2410 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2412 /* Handle complex expressions. */
2413 sym
= make_expr_symbol (exp
);
2417 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2423 s_org (int ignore ATTRIBUTE_UNUSED
)
2425 register segT segment
;
2427 register long temp_fill
;
2429 #ifdef md_flush_pending_output
2430 md_flush_pending_output ();
2433 /* The m68k MRI assembler has a different meaning for .org. It
2434 means to create an absolute section at a given address. We can't
2435 support that--use a linker script instead. */
2438 as_bad (_("MRI style ORG pseudo-op not supported"));
2439 ignore_rest_of_line ();
2443 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2444 thing as a sub-segment-relative origin. Any absolute origin is
2445 given a warning, then assumed to be segment-relative. Any
2446 segmented origin expression ("foo+42") had better be in the right
2447 segment or the .org is ignored.
2449 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2450 we never know sub-segment sizes when we are reading code. BSD
2451 will crash trying to emit negative numbers of filler bytes in
2452 certain .orgs. We don't crash, but see as-write for that code.
2454 Don't make frag if need_pass_2==1. */
2455 segment
= get_known_segmented_expression (&exp
);
2456 if (*input_line_pointer
== ',')
2458 input_line_pointer
++;
2459 temp_fill
= get_absolute_expression ();
2465 do_org (segment
, &exp
, temp_fill
);
2467 demand_empty_rest_of_line ();
2470 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2471 called by the obj-format routine which handles section changing
2472 when in MRI mode. It will create a new section, and return it. It
2473 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2474 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2477 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2487 name
= input_line_pointer
;
2488 if (!ISDIGIT (*name
))
2489 c
= get_symbol_end ();
2494 ++input_line_pointer
;
2496 while (ISDIGIT (*input_line_pointer
));
2498 c
= *input_line_pointer
;
2499 *input_line_pointer
= '\0';
2502 name
= xstrdup (name
);
2504 *input_line_pointer
= c
;
2506 seg
= subseg_new (name
, 0);
2508 if (*input_line_pointer
== ',')
2512 ++input_line_pointer
;
2513 align
= get_absolute_expression ();
2514 record_alignment (seg
, align
);
2518 if (*input_line_pointer
== ',')
2520 c
= *++input_line_pointer
;
2522 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
2525 as_bad (_("unrecognized section type"));
2526 ++input_line_pointer
;
2531 flags
= SEC_NO_FLAGS
;
2533 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
2534 else if (*type
== 'D' || *type
== 'M')
2535 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
2536 else if (*type
== 'R')
2537 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
2538 if (flags
!= SEC_NO_FLAGS
)
2540 if (!bfd_set_section_flags (stdoutput
, seg
, flags
))
2541 as_warn (_("error setting flags for \"%s\": %s"),
2542 bfd_section_name (stdoutput
, seg
),
2543 bfd_errmsg (bfd_get_error ()));
2548 /* Ignore the HP type. */
2549 if (*input_line_pointer
== ',')
2550 input_line_pointer
+= 2;
2552 demand_empty_rest_of_line ();
2554 #else /* ! TC_M68K */
2563 name
= input_line_pointer
;
2564 c
= get_symbol_end ();
2566 name
= xstrdup (name
);
2568 *input_line_pointer
= c
;
2570 seg
= subseg_new (name
, 0);
2572 if (*input_line_pointer
!= ',')
2578 ++input_line_pointer
;
2580 sectype
= input_line_pointer
;
2581 c
= get_symbol_end ();
2582 if (*sectype
== '\0')
2584 else if (strcasecmp (sectype
, "text") == 0)
2586 else if (strcasecmp (sectype
, "data") == 0)
2588 else if (strcasecmp (sectype
, "romdata") == 0)
2591 as_warn (_("unrecognized section type `%s'"), sectype
);
2592 *input_line_pointer
= c
;
2595 if (*input_line_pointer
== ',')
2599 ++input_line_pointer
;
2601 seccmd
= input_line_pointer
;
2602 c
= get_symbol_end ();
2603 if (strcasecmp (seccmd
, "absolute") == 0)
2605 as_bad (_("absolute sections are not supported"));
2606 *input_line_pointer
= c
;
2607 ignore_rest_of_line ();
2610 else if (strcasecmp (seccmd
, "align") == 0)
2614 *input_line_pointer
= c
;
2615 align
= get_absolute_expression ();
2616 record_alignment (seg
, align
);
2620 as_warn (_("unrecognized section command `%s'"), seccmd
);
2621 *input_line_pointer
= c
;
2625 demand_empty_rest_of_line ();
2627 #else /* ! TC_I960 */
2628 /* The MRI assembler seems to use different forms of .sect for
2629 different targets. */
2630 as_bad ("MRI mode not supported for this target");
2631 ignore_rest_of_line ();
2632 #endif /* ! TC_I960 */
2633 #endif /* ! TC_M68K */
2636 /* Handle the .print pseudo-op. */
2639 s_print (int ignore ATTRIBUTE_UNUSED
)
2644 s
= demand_copy_C_string (&len
);
2647 demand_empty_rest_of_line ();
2650 /* Handle the .purgem pseudo-op. */
2653 s_purgem (int ignore ATTRIBUTE_UNUSED
)
2655 if (is_it_end_of_statement ())
2657 demand_empty_rest_of_line ();
2667 name
= input_line_pointer
;
2668 c
= get_symbol_end ();
2669 delete_macro (name
);
2670 *input_line_pointer
= c
;
2673 while (*input_line_pointer
++ == ',');
2675 --input_line_pointer
;
2676 demand_empty_rest_of_line ();
2679 /* Handle the .endm/.endr pseudo-ops. */
2682 s_bad_end (int endr
)
2684 as_warn (_(".end%c encountered without preceeding %s"),
2686 endr
? ".rept, .irp, or .irpc" : ".macro");
2687 demand_empty_rest_of_line ();
2690 /* Handle the .rept pseudo-op. */
2693 s_rept (int ignore ATTRIBUTE_UNUSED
)
2697 count
= get_absolute_expression ();
2699 do_repeat (count
, "REPT", "ENDR");
2702 /* This function provides a generic repeat block implementation. It allows
2703 different directives to be used as the start/end keys. */
2706 do_repeat (int count
, const char *start
, const char *end
)
2712 if (!buffer_and_nest (start
, end
, &one
, get_line_sb
))
2714 as_bad (_("%s without %s"), start
, end
);
2720 sb_add_sb (&many
, &one
);
2724 input_scrub_include_sb (&many
, input_line_pointer
, 1);
2726 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2729 /* Skip to end of current repeat loop; EXTRA indicates how many additional
2730 input buffers to skip. Assumes that conditionals preceding the loop end
2731 are properly nested.
2733 This function makes it easier to implement a premature "break" out of the
2734 loop. The EXTRA arg accounts for other buffers we might have inserted,
2735 such as line substitutions. */
2738 end_repeat (int extra
)
2740 cond_exit_macro (macro_nest
);
2741 while (extra
-- >= 0)
2742 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2746 assign_symbol (char *name
, int no_reassign
)
2750 if (name
[0] == '.' && name
[1] == '\0')
2752 /* Turn '. = mumble' into a .org mumble. */
2756 segment
= get_known_segmented_expression (&exp
);
2759 do_org (segment
, &exp
, 0);
2764 if ((symbolP
= symbol_find (name
)) == NULL
2765 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
2767 symbolP
= symbol_find_or_make (name
);
2769 /* When doing symbol listings, play games with dummy fragments living
2770 outside the normal fragment chain to record the file and line info
2772 if (listing
& LISTING_SYMBOLS
)
2774 extern struct list_info_struct
*listing_tail
;
2775 fragS
*dummy_frag
= (fragS
*) xcalloc (1, sizeof (fragS
));
2776 dummy_frag
->line
= listing_tail
;
2777 dummy_frag
->fr_symbol
= symbolP
;
2778 symbol_set_frag (symbolP
, dummy_frag
);
2782 /* "set" symbols are local unless otherwise specified. */
2783 SF_SET_LOCAL (symbolP
);
2787 /* Permit register names to be redefined. */
2789 && S_IS_DEFINED (symbolP
)
2790 && S_GET_SEGMENT (symbolP
) != reg_section
)
2791 as_bad (_("symbol `%s' is already defined"), name
);
2793 pseudo_set (symbolP
);
2796 /* Handle the .equ, .equiv and .set directives. If EQUIV is 1, then
2797 this is .equiv, and it is an error if the symbol is already
2807 /* Especial apologies for the random logic:
2808 this just grew, and could be parsed much more simply!
2810 name
= input_line_pointer
;
2811 delim
= get_symbol_end ();
2812 end_name
= input_line_pointer
;
2815 if (name
== end_name
)
2817 as_bad (_("expected symbol name"));
2818 ignore_rest_of_line ();
2824 if (*input_line_pointer
!= ',')
2827 as_bad (_("expected comma after \"%s\""), name
);
2829 ignore_rest_of_line ();
2833 input_line_pointer
++;
2836 assign_symbol (name
, equiv
);
2839 demand_empty_rest_of_line ();
2852 #ifdef md_flush_pending_output
2853 md_flush_pending_output ();
2857 stop
= mri_comment_field (&stopc
);
2859 /* In m68k MRI mode, we need to align to a word boundary, unless
2861 if (flag_m68k_mri
&& mult
> 1)
2863 if (now_seg
== absolute_section
)
2865 abs_section_offset
+= abs_section_offset
& 1;
2866 if (line_label
!= NULL
)
2867 S_SET_VALUE (line_label
, abs_section_offset
);
2869 else if (mri_common_symbol
!= NULL
)
2873 val
= S_GET_VALUE (mri_common_symbol
);
2876 S_SET_VALUE (mri_common_symbol
, val
+ 1);
2877 if (line_label
!= NULL
)
2879 expressionS
*symexp
;
2881 symexp
= symbol_get_value_expression (line_label
);
2882 know (symexp
->X_op
== O_symbol
);
2883 know (symexp
->X_add_symbol
== mri_common_symbol
);
2884 symexp
->X_add_number
+= 1;
2890 do_align (1, (char *) NULL
, 0, 0);
2891 if (line_label
!= NULL
)
2893 symbol_set_frag (line_label
, frag_now
);
2894 S_SET_VALUE (line_label
, frag_now_fix ());
2904 if (*input_line_pointer
== ',')
2906 ++input_line_pointer
;
2911 val
.X_op
= O_constant
;
2912 val
.X_add_number
= 0;
2915 if (val
.X_op
!= O_constant
2916 || val
.X_add_number
< - 0x80
2917 || val
.X_add_number
> 0xff
2918 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
2920 if (exp
.X_op
!= O_constant
)
2921 as_bad (_("unsupported variable size or fill value"));
2928 bytes
= mult
* exp
.X_add_number
;
2929 for (i
= 0; i
< exp
.X_add_number
; i
++)
2930 emit_expr (&val
, mult
);
2935 if (exp
.X_op
== O_constant
)
2939 repeat
= exp
.X_add_number
;
2946 as_warn (_(".space repeat count is zero, ignored"));
2947 else if (repeat
< 0)
2948 as_warn (_(".space repeat count is negative, ignored"));
2952 /* If we are in the absolute section, just bump the offset. */
2953 if (now_seg
== absolute_section
)
2955 abs_section_offset
+= repeat
;
2959 /* If we are secretly in an MRI common section, then
2960 creating space just increases the size of the common
2962 if (mri_common_symbol
!= NULL
)
2964 S_SET_VALUE (mri_common_symbol
,
2965 S_GET_VALUE (mri_common_symbol
) + repeat
);
2970 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
2971 (offsetT
) repeat
, (char *) 0);
2975 if (now_seg
== absolute_section
)
2977 as_bad (_("space allocation too complex in absolute section"));
2978 subseg_set (text_section
, 0);
2981 if (mri_common_symbol
!= NULL
)
2983 as_bad (_("space allocation too complex in common section"));
2984 mri_common_symbol
= NULL
;
2988 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
2989 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
2993 *p
= val
.X_add_number
;
2998 /* In MRI mode, after an odd number of bytes, we must align to an
2999 even word boundary, unless the next instruction is a dc.b, ds.b
3001 if (flag_mri
&& (bytes
& 1) != 0)
3002 mri_pending_align
= 1;
3004 demand_empty_rest_of_line ();
3007 mri_comment_end (stop
, stopc
);
3010 /* This is like s_space, but the value is a floating point number with
3011 the given precision. This is for the MRI dcb.s pseudo-op and
3015 s_float_space (int float_type
)
3019 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
3024 stop
= mri_comment_field (&stopc
);
3026 count
= get_absolute_expression ();
3029 if (*input_line_pointer
!= ',')
3031 as_bad (_("missing value"));
3032 ignore_rest_of_line ();
3034 mri_comment_end (stop
, stopc
);
3038 ++input_line_pointer
;
3042 /* Skip any 0{letter} that may be present. Don't even check if the
3043 * letter is legal. */
3044 if (input_line_pointer
[0] == '0'
3045 && ISALPHA (input_line_pointer
[1]))
3046 input_line_pointer
+= 2;
3048 /* Accept :xxxx, where the x's are hex digits, for a floating point
3049 with the exact digits specified. */
3050 if (input_line_pointer
[0] == ':')
3052 flen
= hex_float (float_type
, temp
);
3055 ignore_rest_of_line ();
3057 mri_comment_end (stop
, stopc
);
3065 err
= md_atof (float_type
, temp
, &flen
);
3066 know (flen
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3070 as_bad (_("bad floating literal: %s"), err
);
3071 ignore_rest_of_line ();
3073 mri_comment_end (stop
, stopc
);
3078 while (--count
>= 0)
3082 p
= frag_more (flen
);
3083 memcpy (p
, temp
, (unsigned int) flen
);
3086 demand_empty_rest_of_line ();
3089 mri_comment_end (stop
, stopc
);
3092 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3095 s_struct (int ignore ATTRIBUTE_UNUSED
)
3101 stop
= mri_comment_field (&stopc
);
3102 abs_section_offset
= get_absolute_expression ();
3103 subseg_set (absolute_section
, 0);
3104 demand_empty_rest_of_line ();
3106 mri_comment_end (stop
, stopc
);
3110 s_text (int ignore ATTRIBUTE_UNUSED
)
3114 temp
= get_absolute_expression ();
3115 subseg_set (text_section
, (subsegT
) temp
);
3116 demand_empty_rest_of_line ();
3118 const_flag
&= ~IN_DEFAULT_SECTION
;
3123 /* Verify that we are at the end of a line. If not, issue an error and
3127 demand_empty_rest_of_line (void)
3130 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3131 input_line_pointer
++;
3134 if (ISPRINT (*input_line_pointer
))
3135 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3136 *input_line_pointer
);
3138 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3139 *input_line_pointer
);
3140 ignore_rest_of_line ();
3143 /* Return pointing just after end-of-line. */
3144 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3147 /* Silently advance to the end of line. Use this after already having
3148 issued an error about something bad. */
3151 ignore_rest_of_line (void)
3153 while (input_line_pointer
< buffer_limit
3154 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3155 input_line_pointer
++;
3157 input_line_pointer
++;
3159 /* Return pointing just after end-of-line. */
3160 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3163 /* Sets frag for given symbol to zero_address_frag, except when the
3164 symbol frag is already set to a dummy listing frag. */
3167 set_zero_frag (symbolS
*symbolP
)
3169 if (symbol_get_frag (symbolP
)->fr_type
!= rs_dummy
)
3170 symbol_set_frag (symbolP
, &zero_address_frag
);
3173 /* In: Pointer to a symbol.
3174 Input_line_pointer->expression.
3176 Out: Input_line_pointer->just after any whitespace after expression.
3177 Tried to set symbol to value of expression.
3178 Will change symbols type, value, and frag; */
3181 pseudo_set (symbolS
*symbolP
)
3186 know (symbolP
); /* NULL pointer is logic error. */
3188 (void) expression (&exp
);
3190 if (exp
.X_op
== O_illegal
)
3191 as_bad (_("illegal expression"));
3192 else if (exp
.X_op
== O_absent
)
3193 as_bad (_("missing expression"));
3194 else if (exp
.X_op
== O_big
)
3196 if (exp
.X_add_number
> 0)
3197 as_bad (_("bignum invalid"));
3199 as_bad (_("floating point number invalid"));
3201 else if (exp
.X_op
== O_subtract
3202 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
3203 && (symbol_get_frag (exp
.X_add_symbol
)
3204 == symbol_get_frag (exp
.X_op_symbol
)))
3206 exp
.X_op
= O_constant
;
3207 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
3208 - S_GET_VALUE (exp
.X_op_symbol
));
3211 if (symbol_section_p (symbolP
))
3213 as_bad ("attempt to set value of section symbol");
3222 exp
.X_add_number
= 0;
3225 S_SET_SEGMENT (symbolP
, absolute_section
);
3226 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3227 set_zero_frag (symbolP
);
3231 S_SET_SEGMENT (symbolP
, reg_section
);
3232 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3233 set_zero_frag (symbolP
);
3237 seg
= S_GET_SEGMENT (exp
.X_add_symbol
);
3238 /* For x=undef+const, create an expression symbol.
3239 For x=x+const, just update x except when x is an undefined symbol
3240 For x=defined+const, evaluate x. */
3241 if (symbolP
== exp
.X_add_symbol
3242 && (seg
!= undefined_section
3243 || !symbol_constant_p (symbolP
)))
3245 *symbol_X_add_number (symbolP
) += exp
.X_add_number
;
3248 else if (seg
!= undefined_section
)
3250 symbolS
*s
= exp
.X_add_symbol
;
3252 if (S_IS_COMMON (s
))
3253 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3254 S_GET_NAME (symbolP
), S_GET_NAME (s
));
3256 S_SET_SEGMENT (symbolP
, seg
);
3257 S_SET_VALUE (symbolP
, exp
.X_add_number
+ S_GET_VALUE (s
));
3258 symbol_set_frag (symbolP
, symbol_get_frag (s
));
3259 copy_symbol_attributes (symbolP
, s
);
3265 /* The value is some complex expression.
3266 Set segment and frag back to that of a newly created symbol. */
3267 S_SET_SEGMENT (symbolP
, undefined_section
);
3268 symbol_set_value_expression (symbolP
, &exp
);
3269 set_zero_frag (symbolP
);
3276 CONStruct more frag of .bytes, or .words etc.
3277 Should need_pass_2 be 1 then emit no frag(s).
3278 This understands EXPRESSIONS.
3282 This has a split personality. We use expression() to read the
3283 value. We can detect if the value won't fit in a byte or word.
3284 But we can't detect if expression() discarded significant digits
3285 in the case of a long. Not worth the crocks required to fix it. */
3287 /* Select a parser for cons expressions. */
3289 /* Some targets need to parse the expression in various fancy ways.
3290 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3291 (for example, the HPPA does this). Otherwise, you can define
3292 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3293 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3294 are defined, which is the normal case, then only simple expressions
3299 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
3302 #ifndef TC_PARSE_CONS_EXPRESSION
3303 #ifdef BITFIELD_CONS_EXPRESSIONS
3304 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3306 parse_bitfield_cons (expressionS
*exp
, unsigned int nbytes
);
3308 #ifdef REPEAT_CONS_EXPRESSIONS
3309 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3311 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
3314 /* If we haven't gotten one yet, just call expression. */
3315 #ifndef TC_PARSE_CONS_EXPRESSION
3316 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3321 do_parse_cons_expression (expressionS
*exp
,
3322 int nbytes ATTRIBUTE_UNUSED
)
3324 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3328 /* Worker to do .byte etc statements.
3329 Clobbers input_line_pointer and checks end-of-line. */
3332 cons_worker (register int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
3340 #ifdef md_flush_pending_output
3341 md_flush_pending_output ();
3345 stop
= mri_comment_field (&stopc
);
3347 if (is_it_end_of_statement ())
3349 demand_empty_rest_of_line ();
3351 mri_comment_end (stop
, stopc
);
3355 #ifdef TC_ADDRESS_BYTES
3357 nbytes
= TC_ADDRESS_BYTES ();
3360 #ifdef md_cons_align
3361 md_cons_align (nbytes
);
3369 parse_mri_cons (&exp
, (unsigned int) nbytes
);
3372 TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
3376 if (exp
.X_op
== O_symbol
)
3377 exp
.X_op
= O_symbol_rva
;
3379 as_fatal (_("rva without symbol"));
3381 emit_expr (&exp
, (unsigned int) nbytes
);
3384 while (*input_line_pointer
++ == ',');
3386 /* In MRI mode, after an odd number of bytes, we must align to an
3387 even word boundary, unless the next instruction is a dc.b, ds.b
3389 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
3390 mri_pending_align
= 1;
3392 input_line_pointer
--; /* Put terminator back into stream. */
3394 demand_empty_rest_of_line ();
3397 mri_comment_end (stop
, stopc
);
3403 cons_worker (size
, 0);
3409 cons_worker (size
, 1);
3412 /* Put the contents of expression EXP into the object file using
3413 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3416 emit_expr (expressionS
*exp
, unsigned int nbytes
)
3420 valueT extra_digit
= 0;
3422 /* Don't do anything if we are going to make another pass. */
3426 dot_value
= frag_now_fix ();
3430 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3431 appear as a four byte positive constant in the .line section,
3432 followed by a 2 byte 0xffff. Look for that case here. */
3434 static int dwarf_line
= -1;
3436 if (strcmp (segment_name (now_seg
), ".line") != 0)
3438 else if (dwarf_line
>= 0
3440 && exp
->X_op
== O_constant
3441 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
3442 listing_source_line ((unsigned int) dwarf_line
);
3443 else if (nbytes
== 4
3444 && exp
->X_op
== O_constant
3445 && exp
->X_add_number
>= 0)
3446 dwarf_line
= exp
->X_add_number
;
3451 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3452 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3453 AT_sibling (0x12) followed by a four byte address of the sibling
3454 followed by a 2 byte AT_name (0x38) followed by the name of the
3455 file. We look for that case here. */
3457 static int dwarf_file
= 0;
3459 if (strcmp (segment_name (now_seg
), ".debug") != 0)
3461 else if (dwarf_file
== 0
3463 && exp
->X_op
== O_constant
3464 && exp
->X_add_number
== 0x11)
3466 else if (dwarf_file
== 1
3468 && exp
->X_op
== O_constant
3469 && exp
->X_add_number
== 0x12)
3471 else if (dwarf_file
== 2
3474 else if (dwarf_file
== 3
3476 && exp
->X_op
== O_constant
3477 && exp
->X_add_number
== 0x38)
3482 /* The variable dwarf_file_string tells stringer that the string
3483 may be the name of the source file. */
3484 if (dwarf_file
== 4)
3485 dwarf_file_string
= 1;
3487 dwarf_file_string
= 0;
3492 if (check_eh_frame (exp
, &nbytes
))
3497 /* Allow `.word 0' in the absolute section. */
3498 if (now_seg
== absolute_section
)
3500 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
3501 as_bad (_("attempt to store value in absolute section"));
3502 abs_section_offset
+= nbytes
;
3506 /* Handle a negative bignum. */
3508 && exp
->X_add_number
== 0
3509 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
3510 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
3513 unsigned long carry
;
3515 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
3517 /* Negate the bignum: one's complement each digit and add 1. */
3519 for (i
= 0; i
< exp
->X_add_number
; i
++)
3523 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
3526 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
3527 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
3530 /* We can ignore any carry out, because it will be handled by
3531 extra_digit if it is needed. */
3533 extra_digit
= (valueT
) -1;
3537 if (op
== O_absent
|| op
== O_illegal
)
3539 as_warn (_("zero assumed for missing expression"));
3540 exp
->X_add_number
= 0;
3543 else if (op
== O_big
&& exp
->X_add_number
<= 0)
3545 as_bad (_("floating point number invalid"));
3546 exp
->X_add_number
= 0;
3549 else if (op
== O_register
)
3551 as_warn (_("register value used as expression"));
3555 p
= frag_more ((int) nbytes
);
3557 #ifndef WORKING_DOT_WORD
3558 /* If we have the difference of two symbols in a word, save it on
3559 the broken_words list. See the code in write.c. */
3560 if (op
== O_subtract
&& nbytes
== 2)
3562 struct broken_word
*x
;
3564 x
= (struct broken_word
*) xmalloc (sizeof (struct broken_word
));
3565 x
->next_broken_word
= broken_words
;
3568 x
->subseg
= now_subseg
;
3570 x
->word_goes_here
= p
;
3572 x
->add
= exp
->X_add_symbol
;
3573 x
->sub
= exp
->X_op_symbol
;
3574 x
->addnum
= exp
->X_add_number
;
3582 /* If we have an integer, but the number of bytes is too large to
3583 pass to md_number_to_chars, handle it as a bignum. */
3584 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
3586 extra_digit
= exp
->X_unsigned
? 0 : -1;
3587 convert_to_bignum (exp
);
3591 if (op
== O_constant
)
3593 register valueT get
;
3594 register valueT use
;
3595 register valueT mask
;
3597 register valueT unmask
;
3599 /* JF << of >= number of bits in the object is undefined. In
3600 particular SPARC (Sun 4) has problems. */
3601 if (nbytes
>= sizeof (valueT
))
3604 if (nbytes
> sizeof (valueT
))
3607 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
3611 /* Don't store these bits. */
3612 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
3613 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
3616 unmask
= ~mask
; /* Do store these bits. */
3619 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3620 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
3623 get
= exp
->X_add_number
;
3625 if ((get
& mask
) != 0
3626 && ((get
& mask
) != mask
3627 || (get
& hibit
) == 0))
3628 { /* Leading bits contain both 0s & 1s. */
3629 as_warn (_("value 0x%lx truncated to 0x%lx"),
3630 (unsigned long) get
, (unsigned long) use
);
3632 /* Put bytes in right order. */
3633 md_number_to_chars (p
, use
, (int) nbytes
);
3635 else if (op
== O_big
)
3638 LITTLENUM_TYPE
*nums
;
3640 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
3642 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
3645 as_warn (_("bignum truncated to %d bytes"), nbytes
);
3649 if (target_big_endian
)
3651 while (nbytes
> size
)
3653 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
3654 nbytes
-= CHARS_PER_LITTLENUM
;
3655 p
+= CHARS_PER_LITTLENUM
;
3658 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
3659 while (size
>= CHARS_PER_LITTLENUM
)
3662 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
3663 size
-= CHARS_PER_LITTLENUM
;
3664 p
+= CHARS_PER_LITTLENUM
;
3669 nums
= generic_bignum
;
3670 while (size
>= CHARS_PER_LITTLENUM
)
3672 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
3674 size
-= CHARS_PER_LITTLENUM
;
3675 p
+= CHARS_PER_LITTLENUM
;
3676 nbytes
-= CHARS_PER_LITTLENUM
;
3679 while (nbytes
>= CHARS_PER_LITTLENUM
)
3681 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
3682 nbytes
-= CHARS_PER_LITTLENUM
;
3683 p
+= CHARS_PER_LITTLENUM
;
3689 memset (p
, 0, nbytes
);
3691 /* Now we need to generate a fixS to record the symbol value. */
3693 #ifdef TC_CONS_FIX_NEW
3694 TC_CONS_FIX_NEW (frag_now
, p
- frag_now
->fr_literal
, nbytes
, exp
);
3697 bfd_reloc_code_real_type r
;
3714 as_bad (_("unsupported BFD relocation size %u"), nbytes
);
3718 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, (int) nbytes
, exp
,
3725 #ifdef BITFIELD_CONS_EXPRESSIONS
3727 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3728 w:x,y:z, where w and y are bitwidths and x and y are values. They
3729 then pack them all together. We do a little better in that we allow
3730 them in words, longs, etc. and we'll pack them in target byte order
3733 The rules are: pack least significant bit first, if a field doesn't
3734 entirely fit, put it in the next unit. Overflowing the bitfield is
3735 explicitly *not* even a warning. The bitwidth should be considered
3738 To use this function the tc-XXX.h file should define
3739 BITFIELD_CONS_EXPRESSIONS. */
3742 parse_bitfield_cons (exp
, nbytes
)
3744 unsigned int nbytes
;
3746 unsigned int bits_available
= BITS_PER_CHAR
* nbytes
;
3747 char *hold
= input_line_pointer
;
3749 (void) expression (exp
);
3751 if (*input_line_pointer
== ':')
3758 unsigned long width
;
3760 if (*input_line_pointer
!= ':')
3762 input_line_pointer
= hold
;
3764 } /* Next piece is not a bitfield. */
3766 /* In the general case, we can't allow
3767 full expressions with symbol
3768 differences and such. The relocation
3769 entries for symbols not defined in this
3770 assembly would require arbitrary field
3771 widths, positions, and masks which most
3772 of our current object formats don't
3775 In the specific case where a symbol
3776 *is* defined in this assembly, we
3777 *could* build fixups and track it, but
3778 this could lead to confusion for the
3779 backends. I'm lazy. I'll take any
3780 SEG_ABSOLUTE. I think that means that
3781 you can use a previous .set or
3782 .equ type symbol. xoxorich. */
3784 if (exp
->X_op
== O_absent
)
3786 as_warn (_("using a bit field width of zero"));
3787 exp
->X_add_number
= 0;
3788 exp
->X_op
= O_constant
;
3789 } /* Implied zero width bitfield. */
3791 if (exp
->X_op
!= O_constant
)
3793 *input_line_pointer
= '\0';
3794 as_bad (_("field width \"%s\" too complex for a bitfield"), hold
);
3795 *input_line_pointer
= ':';
3796 demand_empty_rest_of_line ();
3798 } /* Too complex. */
3800 if ((width
= exp
->X_add_number
) > (BITS_PER_CHAR
* nbytes
))
3802 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
3803 width
, nbytes
, (BITS_PER_CHAR
* nbytes
));
3804 width
= BITS_PER_CHAR
* nbytes
;
3807 if (width
> bits_available
)
3809 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
3810 input_line_pointer
= hold
;
3811 exp
->X_add_number
= value
;
3816 hold
= ++input_line_pointer
;
3818 (void) expression (exp
);
3819 if (exp
->X_op
!= O_constant
)
3821 char cache
= *input_line_pointer
;
3823 *input_line_pointer
= '\0';
3824 as_bad (_("field value \"%s\" too complex for a bitfield"), hold
);
3825 *input_line_pointer
= cache
;
3826 demand_empty_rest_of_line ();
3828 } /* Too complex. */
3830 value
|= ((~(-1 << width
) & exp
->X_add_number
)
3831 << ((BITS_PER_CHAR
* nbytes
) - bits_available
));
3833 if ((bits_available
-= width
) == 0
3834 || is_it_end_of_statement ()
3835 || *input_line_pointer
!= ',')
3838 } /* All the bitfields we're gonna get. */
3840 hold
= ++input_line_pointer
;
3841 (void) expression (exp
);
3844 exp
->X_add_number
= value
;
3845 exp
->X_op
= O_constant
;
3846 exp
->X_unsigned
= 1;
3850 #endif /* BITFIELD_CONS_EXPRESSIONS */
3852 /* Handle an MRI style string expression. */
3856 parse_mri_cons (exp
, nbytes
)
3858 unsigned int nbytes
;
3860 if (*input_line_pointer
!= '\''
3861 && (input_line_pointer
[1] != '\''
3862 || (*input_line_pointer
!= 'A'
3863 && *input_line_pointer
!= 'E')))
3864 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3868 unsigned int result
= 0;
3870 /* An MRI style string. Cut into as many bytes as will fit into
3871 a nbyte chunk, left justify if necessary, and separate with
3872 commas so we can try again later. */
3873 if (*input_line_pointer
== 'A')
3874 ++input_line_pointer
;
3875 else if (*input_line_pointer
== 'E')
3877 as_bad (_("EBCDIC constants are not supported"));
3878 ++input_line_pointer
;
3881 input_line_pointer
++;
3882 for (scan
= 0; scan
< nbytes
; scan
++)
3884 if (*input_line_pointer
== '\'')
3886 if (input_line_pointer
[1] == '\'')
3888 input_line_pointer
++;
3893 result
= (result
<< 8) | (*input_line_pointer
++);
3897 while (scan
< nbytes
)
3903 /* Create correct expression. */
3904 exp
->X_op
= O_constant
;
3905 exp
->X_add_number
= result
;
3907 /* Fake it so that we can read the next char too. */
3908 if (input_line_pointer
[0] != '\'' ||
3909 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
3911 input_line_pointer
-= 2;
3912 input_line_pointer
[0] = ',';
3913 input_line_pointer
[1] = '\'';
3916 input_line_pointer
++;
3919 #endif /* TC_M68K */
3921 #ifdef REPEAT_CONS_EXPRESSIONS
3923 /* Parse a repeat expression for cons. This is used by the MIPS
3924 assembler. The format is NUMBER:COUNT; NUMBER appears in the
3925 object file COUNT times.
3927 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
3930 parse_repeat_cons (exp
, nbytes
)
3932 unsigned int nbytes
;
3939 if (*input_line_pointer
!= ':')
3941 /* No repeat count. */
3945 ++input_line_pointer
;
3946 expression (&count
);
3947 if (count
.X_op
!= O_constant
3948 || count
.X_add_number
<= 0)
3950 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
3954 /* The cons function is going to output this expression once. So we
3955 output it count - 1 times. */
3956 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
3957 emit_expr (exp
, nbytes
);
3960 #endif /* REPEAT_CONS_EXPRESSIONS */
3962 /* Parse a floating point number represented as a hex constant. This
3963 permits users to specify the exact bits they want in the floating
3967 hex_float (int float_type
, char *bytes
)
3999 as_bad (_("unknown floating type type '%c'"), float_type
);
4003 /* It would be nice if we could go through expression to parse the
4004 hex constant, but if we get a bignum it's a pain to sort it into
4005 the buffer correctly. */
4007 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4011 /* The MRI assembler accepts arbitrary underscores strewn about
4012 through the hex constant, so we ignore them as well. */
4013 if (*input_line_pointer
== '_')
4015 ++input_line_pointer
;
4021 as_warn (_("floating point constant too large"));
4024 d
= hex_value (*input_line_pointer
) << 4;
4025 ++input_line_pointer
;
4026 while (*input_line_pointer
== '_')
4027 ++input_line_pointer
;
4028 if (hex_p (*input_line_pointer
))
4030 d
+= hex_value (*input_line_pointer
);
4031 ++input_line_pointer
;
4033 if (target_big_endian
)
4036 bytes
[length
- i
- 1] = d
;
4042 if (target_big_endian
)
4043 memset (bytes
+ i
, 0, length
- i
);
4045 memset (bytes
, 0, length
- i
);
4053 CONStruct some more frag chars of .floats .ffloats etc.
4054 Makes 0 or more new frags.
4055 If need_pass_2 == 1, no frags are emitted.
4056 This understands only floating literals, not expressions. Sorry.
4058 A floating constant is defined by atof_generic(), except it is preceded
4059 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4060 reading, I decided to be incompatible. This always tries to give you
4061 rounded bits to the precision of the pseudo-op. Former AS did premature
4062 truncation, restored noisy bits instead of trailing 0s AND gave you
4063 a choice of 2 flavours of noise according to which of 2 floating-point
4064 scanners you directed AS to use.
4066 In: input_line_pointer->whitespace before, or '0' of flonum. */
4069 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4070 register int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4073 int length
; /* Number of chars in an object. */
4074 register char *err
; /* Error from scanning floating literal. */
4075 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4077 if (is_it_end_of_statement ())
4079 demand_empty_rest_of_line ();
4083 #ifdef md_flush_pending_output
4084 md_flush_pending_output ();
4089 /* input_line_pointer->1st char of a flonum (we hope!). */
4092 /* Skip any 0{letter} that may be present. Don't even check if the
4093 letter is legal. Someone may invent a "z" format and this routine
4094 has no use for such information. Lusers beware: you get
4095 diagnostics if your input is ill-conditioned. */
4096 if (input_line_pointer
[0] == '0'
4097 && ISALPHA (input_line_pointer
[1]))
4098 input_line_pointer
+= 2;
4100 /* Accept :xxxx, where the x's are hex digits, for a floating
4101 point with the exact digits specified. */
4102 if (input_line_pointer
[0] == ':')
4104 ++input_line_pointer
;
4105 length
= hex_float (float_type
, temp
);
4108 ignore_rest_of_line ();
4114 err
= md_atof (float_type
, temp
, &length
);
4115 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
4119 as_bad (_("bad floating literal: %s"), err
);
4120 ignore_rest_of_line ();
4131 #ifdef REPEAT_CONS_EXPRESSIONS
4132 if (*input_line_pointer
== ':')
4134 expressionS count_exp
;
4136 ++input_line_pointer
;
4137 expression (&count_exp
);
4139 if (count_exp
.X_op
!= O_constant
4140 || count_exp
.X_add_number
<= 0)
4141 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4143 count
= count_exp
.X_add_number
;
4147 while (--count
>= 0)
4149 p
= frag_more (length
);
4150 memcpy (p
, temp
, (unsigned int) length
);
4155 while (*input_line_pointer
++ == ',');
4157 /* Put terminator back into stream. */
4158 --input_line_pointer
;
4159 demand_empty_rest_of_line ();
4162 /* Return the size of a LEB128 value. */
4165 sizeof_sleb128 (offsetT value
)
4167 register int size
= 0;
4168 register unsigned byte
;
4172 byte
= (value
& 0x7f);
4173 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4174 Fortunately, we can structure things so that the extra work reduces
4175 to a noop on systems that do things "properly". */
4176 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4179 while (!(((value
== 0) && ((byte
& 0x40) == 0))
4180 || ((value
== -1) && ((byte
& 0x40) != 0))));
4186 sizeof_uleb128 (valueT value
)
4188 register int size
= 0;
4189 register unsigned byte
;
4193 byte
= (value
& 0x7f);
4203 sizeof_leb128 (valueT value
, int sign
)
4206 return sizeof_sleb128 ((offsetT
) value
);
4208 return sizeof_uleb128 (value
);
4211 /* Output a LEB128 value. */
4214 output_sleb128 (char *p
, offsetT value
)
4216 register char *orig
= p
;
4221 unsigned byte
= (value
& 0x7f);
4223 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4224 Fortunately, we can structure things so that the extra work reduces
4225 to a noop on systems that do things "properly". */
4226 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4228 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
4229 || ((value
== -1) && ((byte
& 0x40) != 0))));
4241 output_uleb128 (char *p
, valueT value
)
4247 unsigned byte
= (value
& 0x7f);
4250 /* More bytes to follow. */
4261 output_leb128 (char *p
, valueT value
, int sign
)
4264 return output_sleb128 (p
, (offsetT
) value
);
4266 return output_uleb128 (p
, value
);
4269 /* Do the same for bignums. We combine sizeof with output here in that
4270 we don't output for NULL values of P. It isn't really as critical as
4271 for "normal" values that this be streamlined. */
4274 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4281 /* Strip leading sign extensions off the bignum. */
4283 && bignum
[size
- 1] == LITTLENUM_MASK
4284 && bignum
[size
- 2] > LITTLENUM_MASK
/ 2)
4289 /* OR in the next part of the littlenum. */
4290 val
|= (*bignum
<< loaded
);
4291 loaded
+= LITTLENUM_NUMBER_OF_BITS
;
4295 /* Add bytes until there are less than 7 bits left in VAL
4296 or until every non-sign bit has been written. */
4303 || val
!= ((byte
& 0x40) == 0 ? 0 : ((valueT
) 1 << loaded
) - 1))
4310 while ((byte
& 0x80) != 0 && loaded
>= 7);
4314 /* Mop up any left-over bits (of which there will be less than 7). */
4315 if ((byte
& 0x80) != 0)
4317 /* Sign-extend VAL. */
4318 if (val
& (1 << (loaded
- 1)))
4319 val
|= ~0 << loaded
;
4329 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4336 /* Strip leading zeros off the bignum. */
4337 /* XXX: Is this needed? */
4338 while (size
> 0 && bignum
[size
- 1] == 0)
4343 if (loaded
< 7 && size
> 0)
4345 val
|= (*bignum
<< loaded
);
4346 loaded
+= 8 * CHARS_PER_LITTLENUM
;
4355 if (size
> 0 || val
)
4362 while (byte
& 0x80);
4368 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
, int sign
)
4371 return output_big_sleb128 (p
, bignum
, size
);
4373 return output_big_uleb128 (p
, bignum
, size
);
4376 /* Generate the appropriate fragments for a given expression to emit a
4380 emit_leb128_expr (expressionS
*exp
, int sign
)
4382 operatorT op
= exp
->X_op
;
4383 unsigned int nbytes
;
4385 if (op
== O_absent
|| op
== O_illegal
)
4387 as_warn (_("zero assumed for missing expression"));
4388 exp
->X_add_number
= 0;
4391 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4393 as_bad (_("floating point number invalid"));
4394 exp
->X_add_number
= 0;
4397 else if (op
== O_register
)
4399 as_warn (_("register value used as expression"));
4402 else if (op
== O_constant
4404 && (exp
->X_add_number
< 0) != !exp
->X_unsigned
)
4406 /* We're outputting a signed leb128 and the sign of X_add_number
4407 doesn't reflect the sign of the original value. Convert EXP
4408 to a correctly-extended bignum instead. */
4409 convert_to_bignum (exp
);
4413 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
4414 a signal that this is leb128 data. It shouldn't optimize this away. */
4415 nbytes
= (unsigned int) -1;
4416 if (check_eh_frame (exp
, &nbytes
))
4419 /* Let the backend know that subsequent data may be byte aligned. */
4420 #ifdef md_cons_align
4424 if (op
== O_constant
)
4426 /* If we've got a constant, emit the thing directly right now. */
4428 valueT value
= exp
->X_add_number
;
4432 size
= sizeof_leb128 (value
, sign
);
4433 p
= frag_more (size
);
4434 output_leb128 (p
, value
, sign
);
4436 else if (op
== O_big
)
4438 /* O_big is a different sort of constant. */
4443 size
= output_big_leb128 (NULL
, generic_bignum
, exp
->X_add_number
, sign
);
4444 p
= frag_more (size
);
4445 output_big_leb128 (p
, generic_bignum
, exp
->X_add_number
, sign
);
4449 /* Otherwise, we have to create a variable sized fragment and
4450 resolve things later. */
4452 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
4453 make_expr_symbol (exp
), 0, (char *) NULL
);
4457 /* Parse the .sleb128 and .uleb128 pseudos. */
4464 #ifdef md_flush_pending_output
4465 md_flush_pending_output ();
4471 emit_leb128_expr (&exp
, sign
);
4473 while (*input_line_pointer
++ == ',');
4475 input_line_pointer
--;
4476 demand_empty_rest_of_line ();
4479 /* We read 0 or more ',' separated, double-quoted strings.
4480 Caller should have checked need_pass_2 is FALSE because we don't
4484 stringer (/* Worker to do .ascii etc statements. */
4485 /* Checks end-of-line. */
4486 register int append_zero
/* 0: don't append '\0', else 1. */)
4488 register unsigned int c
;
4491 #ifdef md_flush_pending_output
4492 md_flush_pending_output ();
4495 /* The following awkward logic is to parse ZERO or more strings,
4496 comma separated. Recall a string expression includes spaces
4497 before the opening '\"' and spaces after the closing '\"'.
4498 We fake a leading ',' if there is (supposed to be)
4499 a 1st, expression. We keep demanding expressions for each ','. */
4500 if (is_it_end_of_statement ())
4502 c
= 0; /* Skip loop. */
4503 ++input_line_pointer
; /* Compensate for end of loop. */
4507 c
= ','; /* Do loop. */
4509 /* If we have been switched into the abs_section then we
4510 will not have an obstack onto which we can hang strings. */
4511 if (now_seg
== absolute_section
)
4513 as_bad (_("strings must be placed into a section"));
4515 ignore_rest_of_line ();
4518 while (c
== ',' || c
== '<' || c
== '"')
4521 switch (*input_line_pointer
)
4524 ++input_line_pointer
; /*->1st char of string. */
4525 start
= input_line_pointer
;
4526 while (is_a_char (c
= next_char_of_string ()))
4528 FRAG_APPEND_1_CHAR (c
);
4532 FRAG_APPEND_1_CHAR (0);
4534 know (input_line_pointer
[-1] == '\"');
4538 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
4539 will emit .string with a filename in the .debug section
4540 after a sequence of constants. See the comment in
4541 emit_expr for the sequence. emit_expr will set
4542 dwarf_file_string to non-zero if this string might be a
4543 source file name. */
4544 if (strcmp (segment_name (now_seg
), ".debug") != 0)
4545 dwarf_file_string
= 0;
4546 else if (dwarf_file_string
)
4548 c
= input_line_pointer
[-1];
4549 input_line_pointer
[-1] = '\0';
4550 listing_source_file (start
);
4551 input_line_pointer
[-1] = c
;
4558 input_line_pointer
++;
4559 c
= get_single_number ();
4560 FRAG_APPEND_1_CHAR (c
);
4561 if (*input_line_pointer
!= '>')
4563 as_bad (_("expected <nn>"));
4565 input_line_pointer
++;
4568 input_line_pointer
++;
4572 c
= *input_line_pointer
;
4575 demand_empty_rest_of_line ();
4578 /* FIXME-SOMEDAY: I had trouble here on characters with the
4579 high bits set. We'll probably also have trouble with
4580 multibyte chars, wide chars, etc. Also be careful about
4581 returning values bigger than 1 byte. xoxorich. */
4584 next_char_of_string (void)
4586 register unsigned int c
;
4588 c
= *input_line_pointer
++ & CHAR_MASK
;
4596 as_warn (_("unterminated string; newline inserted"));
4597 bump_line_counters ();
4600 #ifndef NO_STRING_ESCAPES
4602 switch (c
= *input_line_pointer
++)
4630 break; /* As itself. */
4646 for (i
= 0, number
= 0;
4647 ISDIGIT (c
) && i
< 3;
4648 c
= *input_line_pointer
++, i
++)
4650 number
= number
* 8 + c
- '0';
4655 --input_line_pointer
;
4664 c
= *input_line_pointer
++;
4665 while (ISXDIGIT (c
))
4668 number
= number
* 16 + c
- '0';
4669 else if (ISUPPER (c
))
4670 number
= number
* 16 + c
- 'A' + 10;
4672 number
= number
* 16 + c
- 'a' + 10;
4673 c
= *input_line_pointer
++;
4676 --input_line_pointer
;
4681 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
4682 as_warn (_("unterminated string; newline inserted"));
4684 bump_line_counters ();
4689 #ifdef ONLY_STANDARD_ESCAPES
4690 as_bad (_("bad escaped character in string"));
4692 #endif /* ONLY_STANDARD_ESCAPES */
4697 #endif /* ! defined (NO_STRING_ESCAPES) */
4706 get_segmented_expression (register expressionS
*expP
)
4708 register segT retval
;
4710 retval
= expression (expP
);
4711 if (expP
->X_op
== O_illegal
4712 || expP
->X_op
== O_absent
4713 || expP
->X_op
== O_big
)
4715 as_bad (_("expected address expression"));
4716 expP
->X_op
= O_constant
;
4717 expP
->X_add_number
= 0;
4718 retval
= absolute_section
;
4724 get_known_segmented_expression (register expressionS
*expP
)
4726 register segT retval
;
4728 if ((retval
= get_segmented_expression (expP
)) == undefined_section
)
4730 /* There is no easy way to extract the undefined symbol from the
4732 if (expP
->X_add_symbol
!= NULL
4733 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
4734 as_warn (_("symbol \"%s\" undefined; zero assumed"),
4735 S_GET_NAME (expP
->X_add_symbol
));
4737 as_warn (_("some symbol undefined; zero assumed"));
4738 retval
= absolute_section
;
4739 expP
->X_op
= O_constant
;
4740 expP
->X_add_number
= 0;
4742 know (retval
== absolute_section
|| SEG_NORMAL (retval
));
4746 char /* Return terminator. */
4747 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
4749 /* FIXME: val_pointer should probably be offsetT *. */
4750 *val_pointer
= (long) get_absolute_expression ();
4751 return (*input_line_pointer
++);
4754 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
4755 Give a warning if that happens. */
4758 demand_copy_C_string (int *len_pointer
)
4762 if ((s
= demand_copy_string (len_pointer
)) != 0)
4766 for (len
= *len_pointer
; len
> 0; len
--)
4773 as_bad (_("this string may not contain \'\\0\'"));
4781 /* Demand string, but return a safe (=private) copy of the string.
4782 Return NULL if we can't read a string here. */
4785 demand_copy_string (int *lenP
)
4787 register unsigned int c
;
4793 if (*input_line_pointer
== '\"')
4795 input_line_pointer
++; /* Skip opening quote. */
4797 while (is_a_char (c
= next_char_of_string ()))
4799 obstack_1grow (¬es
, c
);
4802 /* JF this next line is so demand_copy_C_string will return a
4803 null terminated string. */
4804 obstack_1grow (¬es
, '\0');
4805 retval
= obstack_finish (¬es
);
4809 as_bad (_("missing string"));
4811 ignore_rest_of_line ();
4817 /* In: Input_line_pointer->next character.
4819 Do: Skip input_line_pointer over all whitespace.
4821 Out: 1 if input_line_pointer->end-of-line. */
4824 is_it_end_of_statement (void)
4827 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
4831 equals (char *sym_name
, int reassign
)
4836 input_line_pointer
++;
4837 if (*input_line_pointer
== '=')
4838 input_line_pointer
++;
4840 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
4841 input_line_pointer
++;
4844 stop
= mri_comment_field (&stopc
);
4846 assign_symbol (sym_name
, !reassign
);
4850 demand_empty_rest_of_line ();
4851 mri_comment_end (stop
, stopc
);
4855 /* .incbin -- include a file verbatim at the current location. */
4858 s_incbin (int x ATTRIBUTE_UNUSED
)
4869 #ifdef md_flush_pending_output
4870 md_flush_pending_output ();
4874 filename
= demand_copy_string (& len
);
4875 if (filename
== NULL
)
4880 /* Look for optional skip and count. */
4881 if (* input_line_pointer
== ',')
4883 ++ input_line_pointer
;
4884 skip
= get_absolute_expression ();
4888 if (* input_line_pointer
== ',')
4890 ++ input_line_pointer
;
4892 count
= get_absolute_expression ();
4894 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
4900 demand_empty_rest_of_line ();
4902 /* Try opening absolute path first, then try include dirs. */
4903 binfile
= fopen (filename
, FOPEN_RB
);
4904 if (binfile
== NULL
)
4908 path
= xmalloc ((unsigned long) len
+ include_dir_maxlen
+ 5);
4910 for (i
= 0; i
< include_dir_count
; i
++)
4912 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
4914 binfile
= fopen (path
, FOPEN_RB
);
4915 if (binfile
!= NULL
)
4919 if (binfile
== NULL
)
4920 as_bad (_("file not found: %s"), filename
);
4923 path
= xstrdup (filename
);
4929 register_dependency (path
);
4931 /* Compute the length of the file. */
4932 if (fseek (binfile
, 0, SEEK_END
) != 0)
4934 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
4937 file_len
= ftell (binfile
);
4939 /* If a count was not specified use the remainder of the file. */
4941 count
= file_len
- skip
;
4943 if (skip
< 0 || count
< 0 || file_len
< 0 || skip
+ count
> file_len
)
4945 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
4946 skip
, count
, file_len
);
4950 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
4952 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
4956 /* Allocate frag space and store file contents in it. */
4957 binfrag
= frag_more (count
);
4959 bytes
= fread (binfrag
, 1, count
, binfile
);
4961 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
4962 path
, bytes
, count
);
4965 if (binfile
!= NULL
)
4971 /* .include -- include a file at this point. */
4974 s_include (int arg ATTRIBUTE_UNUSED
)
4983 filename
= demand_copy_string (&i
);
4984 if (filename
== NULL
)
4986 /* demand_copy_string has already printed an error and
4987 called ignore_rest_of_line. */
4995 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
4996 && *input_line_pointer
!= ' '
4997 && *input_line_pointer
!= '\t')
4999 obstack_1grow (¬es
, *input_line_pointer
);
5000 ++input_line_pointer
;
5004 obstack_1grow (¬es
, '\0');
5005 filename
= obstack_finish (¬es
);
5006 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5007 ++input_line_pointer
;
5010 demand_empty_rest_of_line ();
5011 path
= xmalloc ((unsigned long) i
+ include_dir_maxlen
+ 5 /* slop */ );
5013 for (i
= 0; i
< include_dir_count
; i
++)
5015 strcpy (path
, include_dirs
[i
]);
5017 strcat (path
, filename
);
5018 if (0 != (try = fopen (path
, FOPEN_RT
)))
5028 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5029 register_dependency (path
);
5030 input_scrub_insert_file (path
);
5034 add_include_dir (char *path
)
5038 if (include_dir_count
== 0)
5040 include_dirs
= (char **) xmalloc (2 * sizeof (*include_dirs
));
5041 include_dirs
[0] = "."; /* Current dir. */
5042 include_dir_count
= 2;
5046 include_dir_count
++;
5048 (char **) realloc (include_dirs
,
5049 include_dir_count
* sizeof (*include_dirs
));
5052 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
5055 if (i
> include_dir_maxlen
)
5056 include_dir_maxlen
= i
;
5059 /* Output debugging information to denote the source file. */
5062 generate_file_debug (void)
5064 if (debug_type
== DEBUG_STABS
)
5065 stabs_generate_asm_file ();
5068 /* Output line number debugging information for the current source line. */
5071 generate_lineno_debug (void)
5075 case DEBUG_UNSPECIFIED
:
5080 stabs_generate_asm_lineno ();
5083 ecoff_generate_asm_lineno ();
5086 /* ??? We could here indicate to dwarf2dbg.c that something
5087 has changed. However, since there is additional backend
5088 support that is required (calling dwarf2_emit_insn), we
5089 let dwarf2dbg.c call as_where on its own. */
5094 /* Output debugging information to mark a function entry point or end point.
5095 END_P is zero for .func, and non-zero for .endfunc. */
5100 do_s_func (end_p
, NULL
);
5103 /* Subroutine of s_func so targets can choose a different default prefix.
5104 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5107 do_s_func (int end_p
, const char *default_prefix
)
5109 /* Record the current function so that we can issue an error message for
5110 misplaced .func,.endfunc, and also so that .endfunc needs no
5112 static char *current_name
;
5113 static char *current_label
;
5117 if (current_name
== NULL
)
5119 as_bad (_("missing .func"));
5120 ignore_rest_of_line ();
5124 if (debug_type
== DEBUG_STABS
)
5125 stabs_generate_asm_endfunc (current_name
, current_label
);
5127 current_name
= current_label
= NULL
;
5132 char delim1
, delim2
;
5134 if (current_name
!= NULL
)
5136 as_bad (_(".endfunc missing for previous .func"));
5137 ignore_rest_of_line ();
5141 name
= input_line_pointer
;
5142 delim1
= get_symbol_end ();
5143 name
= xstrdup (name
);
5144 *input_line_pointer
= delim1
;
5146 if (*input_line_pointer
!= ',')
5149 asprintf (&label
, "%s%s", default_prefix
, name
);
5152 char leading_char
= bfd_get_symbol_leading_char (stdoutput
);
5153 /* Missing entry point, use function's name with the leading
5156 asprintf (&label
, "%c%s", leading_char
, name
);
5163 ++input_line_pointer
;
5165 label
= input_line_pointer
;
5166 delim2
= get_symbol_end ();
5167 label
= xstrdup (label
);
5168 *input_line_pointer
= delim2
;
5171 if (debug_type
== DEBUG_STABS
)
5172 stabs_generate_asm_func (name
, label
);
5174 current_name
= name
;
5175 current_label
= label
;
5178 demand_empty_rest_of_line ();
5182 s_ignore (int arg ATTRIBUTE_UNUSED
)
5184 ignore_rest_of_line ();
5188 read_print_statistics (FILE *file
)
5190 hash_print_statistics (file
, "pseudo-op table", po_hash
);
5193 /* Inserts the given line into the input stream.
5195 This call avoids macro/conditionals nesting checking, since the contents of
5196 the line are assumed to replace the contents of a line already scanned.
5198 An appropriate use of this function would be substitution of input lines when
5199 called by md_start_line_hook(). The given line is assumed to already be
5200 properly scrubbed. */
5203 input_scrub_insert_line (const char *line
)
5207 sb_add_string (&newline
, line
);
5208 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
5210 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5213 /* Insert a file into the input stream; the path must resolve to an actual
5214 file; no include path searching or dependency registering is performed. */
5217 input_scrub_insert_file (char *path
)
5219 input_scrub_include_file (path
, input_line_pointer
);
5220 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5223 /* Find the end of a line, considering quotation and escaping of quotes. */
5225 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5226 # define TC_SINGLE_QUOTE_STRINGS 1
5230 _find_end_of_line (char *s
, int mri_string
, int insn ATTRIBUTE_UNUSED
)
5232 char inquote
= '\0';
5235 while (!is_end_of_line
[(unsigned char) *s
]
5236 || (inquote
&& !ISCNTRL (*s
))
5237 || (inquote
== '\'' && flag_mri
)
5238 #ifdef TC_EOL_IN_INSN
5239 || (insn
&& TC_EOL_IN_INSN (s
))
5243 if (mri_string
&& *s
== '\'')
5247 else if (*s
== '\\')
5251 #ifdef TC_SINGLE_QUOTE_STRINGS
5252 || (TC_SINGLE_QUOTE_STRINGS
&& *s
== '\'')
5259 as_warn (_("missing closing `%c'"), inquote
);
5261 as_warn (_("stray `\\'"));
5266 find_end_of_line (char *s
, int mri_string
)
5268 return _find_end_of_line (s
, mri_string
, 0);