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, 2006, 2007
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 3, 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"
42 #include "dw2gencfi.h"
44 #ifndef TC_START_LABEL
45 #define TC_START_LABEL(x,y) (x == ':')
48 /* Set by the object-format or the target. */
49 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
50 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
55 else if ((SIZE) >= 4) \
57 else if ((SIZE) >= 2) \
65 char *input_line_pointer
; /*->next char of source file to parse. */
67 #if BITS_PER_CHAR != 8
68 /* The following table is indexed by[(char)] and will break if
69 a char does not have exactly 256 states (hopefully 0:255!)! */
78 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
83 /* The Delta 68k assembler permits % inside label names. */
88 /* The PowerPC Windows NT assemblers permits ? inside label names. */
93 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
94 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
103 /* The Delta 68k assembler permits ~ at start of label names. */
107 /* Used by is_... macros. our ctype[]. */
108 char lex_type
[256] = {
109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
110 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
111 0, 0, 0, LEX_HASH
, LEX_DOLLAR
, LEX_PCT
, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
112 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM
, /* 0123456789:;<=>? */
113 LEX_AT
, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
114 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, 0, 3, /* PQRSTUVWXYZ[\]^_ */
115 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
116 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, LEX_TILDE
, 0, /* pqrstuvwxyz{|}~. */
117 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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
128 Out: 1 if this character ends a line. */
129 char is_end_of_line
[256] = {
131 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
133 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
135 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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, /* 0123456789:;<=>? */
138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
140 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
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 /* */
152 #ifndef TC_CASE_SENSITIVE
153 char original_case_string
[128];
156 /* Functions private to this file. */
158 static char *buffer
; /* 1st char of each buffer of lines is here. */
159 static char *buffer_limit
; /*->1 + last char in buffer. */
161 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
162 in the tc-<CPU>.h file. See the "Porting GAS" section of the
164 int target_big_endian
= TARGET_BYTES_BIG_ENDIAN
;
166 /* Variables for handling include file directory table. */
168 /* Table of pointers to directories to search for .include's. */
171 /* How many are in the table. */
172 int include_dir_count
;
174 /* Length of longest in table. */
175 int include_dir_maxlen
= 1;
177 #ifndef WORKING_DOT_WORD
178 struct broken_word
*broken_words
;
179 int new_broken_words
;
182 /* The current offset into the absolute section. We don't try to
183 build frags in the absolute section, since no data can be stored
184 there. We just keep track of the current offset. */
185 addressT abs_section_offset
;
187 /* If this line had an MRI style label, it is stored in this variable.
188 This is used by some of the MRI pseudo-ops. */
191 /* This global variable is used to support MRI common sections. We
192 translate such sections into a common symbol. This variable is
193 non-NULL when we are in an MRI common section. */
194 symbolS
*mri_common_symbol
;
196 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
197 need to align to an even byte boundary unless the next pseudo-op is
198 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
200 static int mri_pending_align
;
204 /* This variable is set to be non-zero if the next string we see might
205 be the name of the source file in DWARF debugging information. See
206 the comment in emit_expr for the format we look for. */
207 static int dwarf_file_string
;
211 static void do_s_func (int end_p
, const char *default_prefix
);
212 static void do_align (int, char *, int, int);
213 static void s_align (int, int);
214 static void s_altmacro (int);
215 static void s_bad_end (int);
217 static void s_gnu_attribute (int);
219 static void s_reloc (int);
220 static int hex_float (int, char *);
221 static segT
get_known_segmented_expression (expressionS
* expP
);
222 static void pobegin (void);
223 static int get_line_sb (sb
*);
224 static void generate_file_debug (void);
225 static char *_find_end_of_line (char *, int, int);
233 obj_read_begin_hook ();
235 /* Something close -- but not too close -- to a multiple of 1024.
236 The debugging malloc I'm using has 24 bytes of overhead. */
237 obstack_begin (¬es
, chunksize
);
238 obstack_begin (&cond_obstack
, chunksize
);
240 /* Use machine dependent syntax. */
241 for (p
= line_separator_chars
; *p
; p
++)
242 is_end_of_line
[(unsigned char) *p
] = 1;
243 /* Use more. FIXME-SOMEDAY. */
249 #ifndef TC_ADDRESS_BYTES
250 #define TC_ADDRESS_BYTES address_bytes
255 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
256 contain an address. */
257 int n
= (stdoutput
->arch_info
->bits_per_address
- 1) / 8;
265 /* Set up pseudo-op tables. */
267 static struct hash_control
*po_hash
;
269 static const pseudo_typeS potable
[] = {
270 {"abort", s_abort
, 0},
271 {"align", s_align_ptwo
, 0},
272 {"altmacro", s_altmacro
, 1},
273 {"ascii", stringer
, 8+0},
274 {"asciz", stringer
, 8+1},
275 {"balign", s_align_bytes
, 0},
276 {"balignw", s_align_bytes
, -2},
277 {"balignl", s_align_bytes
, -4},
281 {"common", s_mri_common
, 0},
282 {"common.s", s_mri_common
, 1},
285 #ifdef TC_ADDRESS_BYTES
289 {"dc.d", float_cons
, 'd'},
291 {"dc.s", float_cons
, 'f'},
293 {"dc.x", float_cons
, 'x'},
295 {"dcb.b", s_space
, 1},
296 {"dcb.d", s_float_space
, 'd'},
297 {"dcb.l", s_space
, 4},
298 {"dcb.s", s_float_space
, 'f'},
299 {"dcb.w", s_space
, 2},
300 {"dcb.x", s_float_space
, 'x'},
302 {"ds.b", s_space
, 1},
303 {"ds.d", s_space
, 8},
304 {"ds.l", s_space
, 4},
305 {"ds.p", s_space
, 12},
306 {"ds.s", s_space
, 4},
307 {"ds.w", s_space
, 2},
308 {"ds.x", s_space
, 12},
309 {"debug", s_ignore
, 0},
314 {"double", float_cons
, 'd'},
316 {"eject", listing_eject
, 0}, /* Formfeed listing. */
318 {"elsec", s_else
, 0},
319 {"elseif", s_elseif
, (int) O_ne
},
321 {"endc", s_endif
, 0},
322 {"endfunc", s_func
, 1},
323 {"endif", s_endif
, 0},
324 {"endm", s_bad_end
, 0},
325 {"endr", s_bad_end
, 1},
331 {"error", s_errwarn
, 1},
332 {"exitm", s_mexit
, 0},
334 {"extern", s_ignore
, 0}, /* We treat all undef as ext. */
335 {"appfile", s_app_file
, 1},
336 {"appline", s_app_line
, 1},
338 {"file", s_app_file
, 0},
340 {"float", float_cons
, 'f'},
341 {"format", s_ignore
, 0},
343 {"global", s_globl
, 0},
344 {"globl", s_globl
, 0},
346 {"gnu_attribute", s_gnu_attribute
, 0},
349 {"if", s_if
, (int) O_ne
},
352 {"ifdef", s_ifdef
, 0},
353 {"ifeq", s_if
, (int) O_eq
},
354 {"ifeqs", s_ifeqs
, 0},
355 {"ifge", s_if
, (int) O_ge
},
356 {"ifgt", s_if
, (int) O_gt
},
357 {"ifle", s_if
, (int) O_le
},
358 {"iflt", s_if
, (int) O_lt
},
361 {"ifndef", s_ifdef
, 1},
362 {"ifne", s_if
, (int) O_ne
},
363 {"ifnes", s_ifeqs
, 1},
364 {"ifnotdef", s_ifdef
, 1},
365 {"incbin", s_incbin
, 0},
366 {"include", s_include
, 0},
372 {"lcomm", s_lcomm
, 0},
373 {"lflags", listing_flags
, 0}, /* Listing flags. */
374 {"linefile", s_app_line
, 0},
375 {"linkonce", s_linkonce
, 0},
376 {"list", listing_list
, 1}, /* Turn listing on. */
377 {"llen", listing_psize
, 1},
380 {"macro", s_macro
, 0},
381 {"mexit", s_mexit
, 0},
383 {".mri", s_mri
, 0}, /* Special case so .mri works in MRI mode. */
384 {"name", s_ignore
, 0},
385 {"noaltmacro", s_altmacro
, 0},
386 {"noformat", s_ignore
, 0},
387 {"nolist", listing_list
, 0}, /* Turn listing off. */
388 {"nopage", listing_nopage
, 0},
390 {"offset", s_struct
, 0},
392 {"p2align", s_align_ptwo
, 0},
393 {"p2alignw", s_align_ptwo
, -2},
394 {"p2alignl", s_align_ptwo
, -4},
395 {"page", listing_eject
, 0},
396 {"plen", listing_psize
, 0},
397 {"print", s_print
, 0},
398 {"psize", listing_psize
, 0}, /* Set paper size. */
399 {"purgem", s_purgem
, 0},
401 {"reloc", s_reloc
, 0},
405 {"sbttl", listing_title
, 1}, /* Subtitle of listing. */
410 {"single", float_cons
, 'f'},
412 {"space", s_space
, 0},
413 {"skip", s_space
, 0},
414 {"sleb128", s_leb128
, 1},
415 {"spc", s_ignore
, 0},
416 {"stabd", s_stab
, 'd'},
417 {"stabn", s_stab
, 'n'},
418 {"stabs", s_stab
, 's'},
419 {"string", stringer
, 8+1},
420 {"string8", stringer
, 8+1},
421 {"string16", stringer
, 16+1},
422 {"string32", stringer
, 32+1},
423 {"string64", stringer
, 64+1},
424 {"struct", s_struct
, 0},
428 /* This is for gcc to use. It's only just been added (2/94), so gcc
429 won't be able to use it for a while -- probably a year or more.
430 But once this has been released, check with gcc maintainers
431 before deleting it or even changing the spelling. */
432 {"this_GCC_requires_the_GNU_assembler", s_ignore
, 0},
433 /* If we're folding case -- done for some targets, not necessarily
434 all -- the above string in an input file will be converted to
435 this one. Match it either way... */
436 {"this_gcc_requires_the_gnu_assembler", s_ignore
, 0},
438 {"title", listing_title
, 0}, /* Listing title. */
439 {"ttl", listing_title
, 0},
441 {"uleb128", s_leb128
, 0},
445 {"xdef", s_globl
, 0},
446 {"xref", s_ignore
, 0},
447 {"xstabs", s_xstab
, 's'},
448 {"warning", s_errwarn
, 0},
449 {"weakref", s_weakref
, 0},
451 {"zero", s_space
, 0},
452 {NULL
, NULL
, 0} /* End sentinel. */
456 get_absolute_expr (expressionS
*exp
)
458 expression_and_evaluate (exp
);
459 if (exp
->X_op
!= O_constant
)
461 if (exp
->X_op
!= O_absent
)
462 as_bad (_("bad or irreducible absolute expression"));
463 exp
->X_add_number
= 0;
465 return exp
->X_add_number
;
469 get_absolute_expression (void)
473 return get_absolute_expr (&exp
);
476 static int pop_override_ok
= 0;
477 static const char *pop_table_name
;
480 pop_insert (const pseudo_typeS
*table
)
483 const pseudo_typeS
*pop
;
484 for (pop
= table
; pop
->poc_name
; pop
++)
486 errtxt
= hash_insert (po_hash
, pop
->poc_name
, (char *) pop
);
487 if (errtxt
&& (!pop_override_ok
|| strcmp (errtxt
, "exists")))
488 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name
,
493 #ifndef md_pop_insert
494 #define md_pop_insert() pop_insert(md_pseudo_table)
497 #ifndef obj_pop_insert
498 #define obj_pop_insert() pop_insert(obj_pseudo_table)
501 #ifndef cfi_pop_insert
502 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
508 po_hash
= hash_new ();
510 /* Do the target-specific pseudo ops. */
511 pop_table_name
= "md";
514 /* Now object specific. Skip any that were in the target table. */
515 pop_table_name
= "obj";
519 /* Now portable ones. Skip any that we've seen already. */
520 pop_table_name
= "standard";
521 pop_insert (potable
);
523 #ifdef TARGET_USE_CFIPOP
524 pop_table_name
= "cfi";
530 #define HANDLE_CONDITIONAL_ASSEMBLY() \
531 if (ignore_input ()) \
533 char *eol = find_end_of_line (input_line_pointer, flag_m68k_mri); \
534 input_line_pointer = (input_line_pointer <= buffer_limit \
535 && eol >= buffer_limit) \
541 /* This function is used when scrubbing the characters between #APP
544 static char *scrub_string
;
545 static char *scrub_string_end
;
548 scrub_from_string (char *buf
, int buflen
)
552 copy
= scrub_string_end
- scrub_string
;
555 memcpy (buf
, scrub_string
, copy
);
556 scrub_string
+= copy
;
560 /* Helper function of read_a_source_file, which tries to expand a macro. */
562 try_macro (char term
, const char *line
)
568 if (check_macro (line
, &out
, &err
, ¯o
))
572 *input_line_pointer
++ = term
;
573 input_scrub_include_sb (&out
,
574 input_line_pointer
, 1);
577 input_scrub_next_buffer (&input_line_pointer
);
579 md_macro_info (macro
);
586 /* We read the file, putting things into a web that represents what we
587 have been reading. */
589 read_a_source_file (char *name
)
592 register char *s
; /* String of symbol, '\0' appended. */
600 buffer
= input_scrub_new_file (name
);
603 listing_newline (NULL
);
604 register_dependency (name
);
606 /* Generate debugging information before we've read anything in to denote
607 this file as the "main" source file and not a subordinate one
608 (e.g. N_SO vs N_SOL in stabs). */
609 generate_file_debug ();
611 while ((buffer_limit
= input_scrub_next_buffer (&input_line_pointer
)) != 0)
612 { /* We have another line to parse. */
614 /* In order to avoid listing macro expansion lines with labels
615 multiple times, keep track of which line was last issued. */
616 static char *last_eol
;
620 while (input_line_pointer
< buffer_limit
)
622 /* We have more of this buffer to parse. */
624 /* We now have input_line_pointer->1st char of next line.
625 If input_line_pointer [-1] == '\n' then we just
626 scanned another line: so bump line counters. */
627 if (is_end_of_line
[(unsigned char) input_line_pointer
[-1]])
629 #ifdef md_start_line_hook
630 md_start_line_hook ();
632 if (input_line_pointer
[-1] == '\n')
633 bump_line_counters ();
637 if (LABELS_WITHOUT_COLONS
|| flag_m68k_mri
)
639 /* Text at the start of a line must be a label, we
640 run down and stick a colon in. */
641 if (is_name_beginner (*input_line_pointer
))
643 char *line_start
= input_line_pointer
;
648 HANDLE_CONDITIONAL_ASSEMBLY ();
650 c
= get_symbol_end ();
652 /* In MRI mode, the EQU and MACRO pseudoops must
653 be handled specially. */
657 char *rest
= input_line_pointer
+ 1;
661 if (*rest
== ' ' || *rest
== '\t')
663 if ((strncasecmp (rest
, "EQU", 3) == 0
664 || strncasecmp (rest
, "SET", 3) == 0)
665 && (rest
[3] == ' ' || rest
[3] == '\t'))
667 input_line_pointer
= rest
+ 3;
669 strncasecmp (rest
, "SET", 3) == 0);
672 if (strncasecmp (rest
, "MACRO", 5) == 0
675 || is_end_of_line
[(unsigned char) rest
[5]]))
679 /* In MRI mode, we need to handle the MACRO
680 pseudo-op specially: we don't want to put the
681 symbol in the symbol table. */
683 #ifdef TC_START_LABEL_WITHOUT_COLON
684 && TC_START_LABEL_WITHOUT_COLON(c
,
688 line_label
= colon (line_start
);
690 line_label
= symbol_create (line_start
,
695 *input_line_pointer
= c
;
697 input_line_pointer
++;
702 /* We are at the beginning of a line, or similar place.
703 We expect a well-formed assembler statement.
704 A "symbol-name:" is a statement.
706 Depending on what compiler is used, the order of these tests
707 may vary to catch most common case 1st.
708 Each test is independent of all other tests at the (top)
711 c
= *input_line_pointer
++;
712 while (c
== '\t' || c
== ' ' || c
== '\f');
715 /* If listing is on, and we are expanding a macro, then give
716 the listing code the contents of the expanded line. */
719 if ((listing
& LISTING_MACEXP
) && macro_nest
> 0)
724 /* Find the end of the current expanded macro line. */
725 s
= find_end_of_line (input_line_pointer
- 1, flag_m68k_mri
);
730 /* Copy it for safe keeping. Also give an indication of
731 how much macro nesting is involved at this point. */
732 len
= s
- (input_line_pointer
- 1);
733 copy
= (char *) xmalloc (len
+ macro_nest
+ 2);
734 memset (copy
, '>', macro_nest
);
735 copy
[macro_nest
] = ' ';
736 memcpy (copy
+ macro_nest
+ 1, input_line_pointer
- 1, len
);
737 copy
[macro_nest
+ 1 + len
] = '\0';
739 /* Install the line with the listing facility. */
740 listing_newline (copy
);
744 listing_newline (NULL
);
747 /* C is the 1st significant character.
748 Input_line_pointer points after that character. */
749 if (is_name_beginner (c
))
751 /* Want user-defined label or pseudo/opcode. */
752 HANDLE_CONDITIONAL_ASSEMBLY ();
754 s
= --input_line_pointer
;
755 c
= get_symbol_end (); /* name's delimiter. */
757 /* C is character after symbol.
758 That character's place in the input line is now '\0'.
759 S points to the beginning of the symbol.
760 [In case of pseudo-op, s->'.'.]
761 Input_line_pointer->'\0' where c was. */
762 if (TC_START_LABEL (c
, input_line_pointer
))
766 char *rest
= input_line_pointer
+ 1;
768 /* In MRI mode, \tsym: set 0 is permitted. */
772 if (*rest
== ' ' || *rest
== '\t')
775 if ((strncasecmp (rest
, "EQU", 3) == 0
776 || strncasecmp (rest
, "SET", 3) == 0)
777 && (rest
[3] == ' ' || rest
[3] == '\t'))
779 input_line_pointer
= rest
+ 3;
785 line_label
= colon (s
); /* User-defined label. */
786 /* Put ':' back for error messages' sake. */
787 *input_line_pointer
++ = ':';
788 #ifdef tc_check_label
789 tc_check_label (line_label
);
791 /* Input_line_pointer->after ':'. */
794 else if (input_line_pointer
[1] == '='
796 || ((c
== ' ' || c
== '\t')
797 && input_line_pointer
[2] == '=')))
800 demand_empty_rest_of_line ();
803 || ((c
== ' ' || c
== '\t')
804 && input_line_pointer
[1] == '='))
805 #ifdef TC_EQUAL_IN_INSN
806 && !TC_EQUAL_IN_INSN (c
, s
)
811 demand_empty_rest_of_line ();
815 /* Expect pseudo-op or machine instruction. */
818 #ifndef TC_CASE_SENSITIVE
822 strncpy (original_case_string
, s2
, sizeof (original_case_string
));
823 original_case_string
[sizeof (original_case_string
) - 1] = 0;
832 if (NO_PSEUDO_DOT
|| flag_m68k_mri
)
834 /* The MRI assembler uses pseudo-ops without
836 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
);
837 if (pop
!= NULL
&& pop
->poc_handler
== NULL
)
842 || (!flag_m68k_mri
&& *s
== '.'))
846 WARNING: c has next char, which may be end-of-line.
847 We lookup the pseudo-op table with s+1 because we
848 already know that the pseudo-op begins with a '.'. */
851 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
+ 1);
852 if (pop
&& !pop
->poc_handler
)
855 /* In MRI mode, we may need to insert an
856 automatic alignment directive. What a hack
858 if (mri_pending_align
860 || !((pop
->poc_handler
== cons
861 && pop
->poc_val
== 1)
862 || (pop
->poc_handler
== s_space
863 && pop
->poc_val
== 1)
864 #ifdef tc_conditional_pseudoop
865 || tc_conditional_pseudoop (pop
)
867 || pop
->poc_handler
== s_if
868 || pop
->poc_handler
== s_ifdef
869 || pop
->poc_handler
== s_ifc
870 || pop
->poc_handler
== s_ifeqs
871 || pop
->poc_handler
== s_else
872 || pop
->poc_handler
== s_endif
873 || pop
->poc_handler
== s_globl
874 || pop
->poc_handler
== s_ignore
)))
876 do_align (1, (char *) NULL
, 0, 0);
877 mri_pending_align
= 0;
879 if (line_label
!= NULL
)
881 symbol_set_frag (line_label
, frag_now
);
882 S_SET_VALUE (line_label
, frag_now_fix ());
886 /* Print the error msg now, while we still can. */
889 char *end
= input_line_pointer
;
891 *input_line_pointer
= c
;
893 c
= *--input_line_pointer
;
894 *input_line_pointer
= '\0';
895 if (! macro_defined
|| ! try_macro (c
, s
))
898 as_bad (_("unknown pseudo-op: `%s'"), s
);
899 *input_line_pointer
++ = c
;
904 /* Put it back for error messages etc. */
905 *input_line_pointer
= c
;
906 /* The following skip of whitespace is compulsory.
907 A well shaped space is sometimes all that separates
908 keyword from operands. */
909 if (c
== ' ' || c
== '\t')
910 input_line_pointer
++;
912 /* Input_line is restored.
913 Input_line_pointer->1st non-blank char
914 after pseudo-operation. */
915 (*pop
->poc_handler
) (pop
->poc_val
);
917 /* If that was .end, just get out now. */
918 if (pop
->poc_handler
== s_end
)
923 /* WARNING: c has char, which may be end-of-line. */
924 /* Also: input_line_pointer->`\0` where c was. */
925 *input_line_pointer
= c
;
926 input_line_pointer
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 1);
927 c
= *input_line_pointer
;
928 *input_line_pointer
= '\0';
930 generate_lineno_debug ();
932 if (macro_defined
&& try_macro (c
, s
))
935 if (mri_pending_align
)
937 do_align (1, (char *) NULL
, 0, 0);
938 mri_pending_align
= 0;
939 if (line_label
!= NULL
)
941 symbol_set_frag (line_label
, frag_now
);
942 S_SET_VALUE (line_label
, frag_now_fix ());
946 md_assemble (s
); /* Assemble 1 instruction. */
948 *input_line_pointer
++ = c
;
950 /* We resume loop AFTER the end-of-line from
957 /* Empty statement? */
958 if (is_end_of_line
[(unsigned char) c
])
961 if ((LOCAL_LABELS_DOLLAR
|| LOCAL_LABELS_FB
) && ISDIGIT (c
))
963 /* local label ("4:") */
964 char *backup
= input_line_pointer
;
966 HANDLE_CONDITIONAL_ASSEMBLY ();
970 /* Read the whole number. */
971 while (ISDIGIT (*input_line_pointer
))
973 temp
= (temp
* 10) + *input_line_pointer
- '0';
974 ++input_line_pointer
;
977 if (LOCAL_LABELS_DOLLAR
978 && *input_line_pointer
== '$'
979 && *(input_line_pointer
+ 1) == ':')
981 input_line_pointer
+= 2;
983 if (dollar_label_defined (temp
))
985 as_fatal (_("label \"%d$\" redefined"), temp
);
988 define_dollar_label (temp
);
989 colon (dollar_label_name (temp
, 0));
994 && *input_line_pointer
++ == ':')
996 fb_label_instance_inc (temp
);
997 colon (fb_label_name (temp
, 0));
1001 input_line_pointer
= backup
;
1002 } /* local label ("4:") */
1004 if (c
&& strchr (line_comment_chars
, c
))
1005 { /* Its a comment. Better say APP or NO_APP. */
1010 unsigned int new_length
;
1013 s
= input_line_pointer
;
1014 if (strncmp (s
, "APP\n", 4))
1017 ignore_rest_of_line ();
1020 bump_line_counters ();
1024 ends
= strstr (s
, "#NO_APP\n");
1028 unsigned int tmp_len
;
1031 /* The end of the #APP wasn't in this buffer. We
1032 keep reading in buffers until we find the #NO_APP
1033 that goes with this #APP There is one. The specs
1035 tmp_len
= buffer_limit
- s
;
1036 tmp_buf
= xmalloc (tmp_len
+ 1);
1037 memcpy (tmp_buf
, s
, tmp_len
);
1040 new_tmp
= input_scrub_next_buffer (&buffer
);
1044 buffer_limit
= new_tmp
;
1045 input_line_pointer
= buffer
;
1046 ends
= strstr (buffer
, "#NO_APP\n");
1048 num
= ends
- buffer
;
1050 num
= buffer_limit
- buffer
;
1052 tmp_buf
= xrealloc (tmp_buf
, tmp_len
+ num
);
1053 memcpy (tmp_buf
+ tmp_len
, buffer
, num
);
1058 input_line_pointer
= ends
? ends
+ 8 : NULL
;
1066 input_line_pointer
= ends
+ 8;
1070 scrub_string_end
= ends
;
1072 new_length
= ends
- s
;
1073 new_buf
= (char *) xmalloc (new_length
);
1080 space
= (new_buf
+ new_length
) - new_tmp
;
1081 size
= do_scrub_chars (scrub_from_string
, new_tmp
, space
);
1089 new_buf
= xrealloc (new_buf
, new_length
+ 100);
1090 new_tmp
= new_buf
+ new_length
;
1097 /* We've "scrubbed" input to the preferred format. In the
1098 process we may have consumed the whole of the remaining
1099 file (and included files). We handle this formatted
1100 input similar to that of macro expansion, letting
1101 actual macro expansion (possibly nested) and other
1102 input expansion work. Beware that in messages, line
1103 numbers and possibly file names will be incorrect. */
1104 sb_add_string (&sbuf
, new_buf
);
1105 input_scrub_include_sb (&sbuf
, input_line_pointer
, 0);
1107 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1112 HANDLE_CONDITIONAL_ASSEMBLY ();
1114 #ifdef tc_unrecognized_line
1115 if (tc_unrecognized_line (c
))
1118 input_line_pointer
--;
1119 /* Report unknown char as error. */
1120 demand_empty_rest_of_line ();
1123 #ifdef md_after_pass_hook
1124 md_after_pass_hook ();
1133 /* Close the input file. */
1134 input_scrub_close ();
1135 #ifdef WARN_COMMENTS
1137 if (warn_comment
&& found_comment
)
1138 as_warn_where (found_comment_file
, found_comment
,
1139 "first comment found here");
1144 /* Convert O_constant expression EXP into the equivalent O_big representation.
1145 Take the sign of the number from X_unsigned rather than X_add_number. */
1148 convert_to_bignum (expressionS
*exp
)
1153 value
= exp
->X_add_number
;
1154 for (i
= 0; i
< sizeof (exp
->X_add_number
) / CHARS_PER_LITTLENUM
; i
++)
1156 generic_bignum
[i
] = value
& LITTLENUM_MASK
;
1157 value
>>= LITTLENUM_NUMBER_OF_BITS
;
1159 /* Add a sequence of sign bits if the top bit of X_add_number is not
1160 the sign of the original value. */
1161 if ((exp
->X_add_number
< 0) != !exp
->X_unsigned
)
1162 generic_bignum
[i
++] = exp
->X_unsigned
? 0 : LITTLENUM_MASK
;
1164 exp
->X_add_number
= i
;
1167 /* For most MRI pseudo-ops, the line actually ends at the first
1168 nonquoted space. This function looks for that point, stuffs a null
1169 in, and sets *STOPCP to the character that used to be there, and
1170 returns the location.
1172 Until I hear otherwise, I am going to assume that this is only true
1173 for the m68k MRI assembler. */
1176 mri_comment_field (char *stopcp
)
1182 know (flag_m68k_mri
);
1184 for (s
= input_line_pointer
;
1185 ((!is_end_of_line
[(unsigned char) *s
] && *s
!= ' ' && *s
!= '\t')
1193 for (s
= input_line_pointer
;
1194 !is_end_of_line
[(unsigned char) *s
];
1204 /* Skip to the end of an MRI comment field. */
1207 mri_comment_end (char *stop
, int stopc
)
1211 input_line_pointer
= stop
;
1213 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1214 ++input_line_pointer
;
1218 s_abort (int ignore ATTRIBUTE_UNUSED
)
1220 as_fatal (_(".abort detected. Abandoning ship."));
1223 /* Guts of .align directive. N is the power of two to which to align.
1224 FILL may be NULL, or it may point to the bytes of the fill pattern.
1225 LEN is the length of whatever FILL points to, if anything. MAX is
1226 the maximum number of characters to skip when doing the alignment,
1227 or 0 if there is no maximum. */
1230 do_align (int n
, char *fill
, int len
, int max
)
1232 if (now_seg
== absolute_section
)
1236 if (*fill
++ != '\0')
1238 as_warn (_("ignoring fill value in absolute section"));
1245 #ifdef md_flush_pending_output
1246 md_flush_pending_output ();
1249 md_do_align (n
, fill
, len
, max
, just_record_alignment
);
1252 /* Only make a frag if we HAVE to... */
1253 if (n
!= 0 && !need_pass_2
)
1257 if (subseg_text_p (now_seg
))
1258 frag_align_code (n
, max
);
1260 frag_align (n
, 0, max
);
1263 frag_align (n
, *fill
, max
);
1265 frag_align_pattern (n
, fill
, len
, max
);
1269 just_record_alignment
: ATTRIBUTE_UNUSED_LABEL
1272 record_alignment (now_seg
, n
- OCTETS_PER_BYTE_POWER
);
1275 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1276 (in bytes). A negative ARG is the negative of the length of the
1277 fill pattern. BYTES_P is non-zero if the alignment value should be
1278 interpreted as the byte boundary, rather than the power of 2. */
1280 #define ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1283 s_align (int arg
, int bytes_p
)
1285 unsigned int align_limit
= ALIGN_LIMIT
;
1294 stop
= mri_comment_field (&stopc
);
1296 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1301 align
= arg
; /* Default value from pseudo-op table. */
1305 align
= get_absolute_expression ();
1311 /* Convert to a power of 2. */
1316 for (i
= 0; (align
& 1) == 0; align
>>= 1, ++i
)
1319 as_bad (_("alignment not a power of 2"));
1325 if (align
> align_limit
)
1327 align
= align_limit
;
1328 as_warn (_("alignment too large: %u assumed"), align
);
1331 if (*input_line_pointer
!= ',')
1338 ++input_line_pointer
;
1339 if (*input_line_pointer
== ',')
1343 fill
= get_absolute_expression ();
1348 if (*input_line_pointer
!= ',')
1352 ++input_line_pointer
;
1353 max
= get_absolute_expression ();
1360 as_warn (_("expected fill pattern missing"));
1361 do_align (align
, (char *) NULL
, 0, max
);
1376 do_align (align
, &fill_char
, fill_len
, max
);
1382 if ((size_t) fill_len
> sizeof ab
)
1384 md_number_to_chars (ab
, fill
, fill_len
);
1385 do_align (align
, ab
, fill_len
, max
);
1389 demand_empty_rest_of_line ();
1392 mri_comment_end (stop
, stopc
);
1395 /* Handle the .align pseudo-op on machines where ".align 4" means
1396 align to a 4 byte boundary. */
1399 s_align_bytes (int arg
)
1404 /* Handle the .align pseudo-op on machines where ".align 4" means align
1405 to a 2**4 boundary. */
1408 s_align_ptwo (int arg
)
1413 /* Switch in and out of alternate macro mode. */
1418 demand_empty_rest_of_line ();
1419 macro_set_alternate (on
);
1423 s_comm_internal (int param
,
1424 symbolS
*(*comm_parse_extra
) (int, symbolS
*, addressT
))
1430 symbolS
*symbolP
= NULL
;
1436 stop
= mri_comment_field (&stopc
);
1438 name
= input_line_pointer
;
1439 c
= get_symbol_end ();
1440 /* Just after name is now '\0'. */
1441 p
= input_line_pointer
;
1446 as_bad (_("expected symbol name"));
1447 ignore_rest_of_line ();
1453 /* Accept an optional comma after the name. The comma used to be
1454 required, but Irix 5 cc does not generate it for .lcomm. */
1455 if (*input_line_pointer
== ',')
1456 input_line_pointer
++;
1458 temp
= get_absolute_expr (&exp
);
1460 size
&= ((offsetT
) 2 << (stdoutput
->arch_info
->bits_per_address
- 1)) - 1;
1461 if (exp
.X_op
== O_absent
)
1463 as_bad (_("missing size expression"));
1464 ignore_rest_of_line ();
1467 else if (temp
!= size
|| !exp
.X_unsigned
)
1469 as_warn (_("size (%ld) out of range, ignored"), (long) temp
);
1470 ignore_rest_of_line ();
1475 symbolP
= symbol_find_or_make (name
);
1476 if ((S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
1477 && !S_IS_COMMON (symbolP
))
1479 if (!S_IS_VOLATILE (symbolP
))
1482 as_bad (_("symbol `%s' is already defined"), name
);
1484 ignore_rest_of_line ();
1487 symbolP
= symbol_clone (symbolP
, 1);
1488 S_SET_SEGMENT (symbolP
, undefined_section
);
1489 S_SET_VALUE (symbolP
, 0);
1490 symbol_set_frag (symbolP
, &zero_address_frag
);
1491 S_CLEAR_VOLATILE (symbolP
);
1494 size
= S_GET_VALUE (symbolP
);
1497 else if (size
!= temp
)
1498 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1499 name
, (long) size
, (long) temp
);
1502 if (comm_parse_extra
!= NULL
)
1503 symbolP
= (*comm_parse_extra
) (param
, symbolP
, size
);
1506 S_SET_VALUE (symbolP
, (valueT
) size
);
1507 S_SET_EXTERNAL (symbolP
);
1508 S_SET_SEGMENT (symbolP
, bfd_com_section_ptr
);
1511 extern int flag_one
;
1512 if (size
== 0 || !flag_one
)
1513 S_GET_OTHER (symbolP
) = const_flag
;
1518 demand_empty_rest_of_line ();
1521 mri_comment_end (stop
, stopc
);
1528 s_comm_internal (ignore
, NULL
);
1531 /* The MRI COMMON pseudo-op. We handle this by creating a common
1532 symbol with the appropriate name. We make s_space do the right
1533 thing by increasing the size. */
1536 s_mri_common (int small ATTRIBUTE_UNUSED
)
1552 stop
= mri_comment_field (&stopc
);
1556 name
= input_line_pointer
;
1557 if (!ISDIGIT (*name
))
1558 c
= get_symbol_end ();
1563 ++input_line_pointer
;
1565 while (ISDIGIT (*input_line_pointer
));
1567 c
= *input_line_pointer
;
1568 *input_line_pointer
= '\0';
1570 if (line_label
!= NULL
)
1572 alc
= (char *) xmalloc (strlen (S_GET_NAME (line_label
))
1573 + (input_line_pointer
- name
)
1575 sprintf (alc
, "%s%s", name
, S_GET_NAME (line_label
));
1580 sym
= symbol_find_or_make (name
);
1581 *input_line_pointer
= c
;
1585 if (*input_line_pointer
!= ',')
1589 ++input_line_pointer
;
1590 align
= get_absolute_expression ();
1593 if (S_IS_DEFINED (sym
) && !S_IS_COMMON (sym
))
1595 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym
));
1596 ignore_rest_of_line ();
1597 mri_comment_end (stop
, stopc
);
1601 S_SET_EXTERNAL (sym
);
1602 S_SET_SEGMENT (sym
, bfd_com_section_ptr
);
1603 mri_common_symbol
= sym
;
1607 S_SET_ALIGN (sym
, align
);
1610 if (line_label
!= NULL
)
1613 exp
.X_op
= O_symbol
;
1614 exp
.X_add_symbol
= sym
;
1615 exp
.X_add_number
= 0;
1616 symbol_set_value_expression (line_label
, &exp
);
1617 symbol_set_frag (line_label
, &zero_address_frag
);
1618 S_SET_SEGMENT (line_label
, expr_section
);
1621 /* FIXME: We just ignore the small argument, which distinguishes
1622 COMMON and COMMON.S. I don't know what we can do about it. */
1624 /* Ignore the type and hptype. */
1625 if (*input_line_pointer
== ',')
1626 input_line_pointer
+= 2;
1627 if (*input_line_pointer
== ',')
1628 input_line_pointer
+= 2;
1630 demand_empty_rest_of_line ();
1632 mri_comment_end (stop
, stopc
);
1636 s_data (int ignore ATTRIBUTE_UNUSED
)
1641 temp
= get_absolute_expression ();
1642 if (flag_readonly_data_in_text
)
1644 section
= text_section
;
1648 section
= data_section
;
1650 subseg_set (section
, (subsegT
) temp
);
1655 demand_empty_rest_of_line ();
1658 /* Handle the .appfile pseudo-op. This is automatically generated by
1659 do_scrub_chars when a preprocessor # line comment is seen with a
1660 file name. This default definition may be overridden by the object
1661 or CPU specific pseudo-ops. This function is also the default
1662 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1666 s_app_file_string (char *file
, int appfile ATTRIBUTE_UNUSED
)
1670 listing_source_file (file
);
1672 register_dependency (file
);
1674 obj_app_file (file
, appfile
);
1679 s_app_file (int appfile
)
1684 /* Some assemblers tolerate immediately following '"'. */
1685 if ((s
= demand_copy_string (&length
)) != 0)
1688 = (!new_logical_line_flags (s
, -1, 1) && appfile
);
1690 /* In MRI mode, the preprocessor may have inserted an extraneous
1693 && *input_line_pointer
== '\''
1694 && is_end_of_line
[(unsigned char) input_line_pointer
[1]])
1695 ++input_line_pointer
;
1697 demand_empty_rest_of_line ();
1699 s_app_file_string (s
, appfile
);
1704 get_linefile_number (int *flag
)
1708 if (*input_line_pointer
< '0' || *input_line_pointer
> '9')
1711 *flag
= get_absolute_expression ();
1716 /* Handle the .appline pseudo-op. This is automatically generated by
1717 do_scrub_chars when a preprocessor # line comment is seen. This
1718 default definition may be overridden by the object or CPU specific
1722 s_app_line (int appline
)
1727 /* The given number is that of the next line. */
1729 l
= get_absolute_expression ();
1730 else if (!get_linefile_number (&l
))
1732 ignore_rest_of_line ();
1739 /* Some of the back ends can't deal with non-positive line numbers.
1740 Besides, it's silly. GCC however will generate a line number of
1741 zero when it is pre-processing builtins for assembler-with-cpp files:
1745 We do not want to barf on this, especially since such files are used
1746 in the GCC and GDB testsuites. So we check for negative line numbers
1747 rather than non-positive line numbers. */
1748 as_warn (_("line numbers must be positive; line number %d rejected"),
1759 if (*input_line_pointer
== '"')
1760 file
= demand_copy_string (&length
);
1766 while (get_linefile_number (&this_flag
))
1769 /* From GCC's cpp documentation:
1770 1: start of a new file.
1771 2: returning to a file after having included
1773 3: following text comes from a system header file.
1774 4: following text should be treated as extern "C".
1776 4 is nonsensical for the assembler; 3, we don't
1777 care about, so we ignore it just in case a
1778 system header file is included while
1779 preprocessing assembly. So 1 and 2 are all we
1780 care about, and they are mutually incompatible.
1781 new_logical_line_flags() demands this. */
1784 if (flags
&& flags
!= (1 << this_flag
))
1785 as_warn (_("incompatible flag %i in line directive"),
1788 flags
|= 1 << this_flag
;
1793 /* We ignore these. */
1797 as_warn (_("unsupported flag %i in line directive"),
1802 if (!is_end_of_line
[(unsigned char)*input_line_pointer
])
1807 if (appline
|| file
)
1809 new_logical_line_flags (file
, l
, flags
);
1812 listing_source_line (l
);
1816 if (appline
|| file
)
1817 demand_empty_rest_of_line ();
1819 ignore_rest_of_line ();
1822 /* Handle the .end pseudo-op. Actually, the real work is done in
1823 read_a_source_file. */
1826 s_end (int ignore ATTRIBUTE_UNUSED
)
1830 /* The MRI assembler permits the start symbol to follow .end,
1831 but we don't support that. */
1833 if (!is_end_of_line
[(unsigned char) *input_line_pointer
]
1834 && *input_line_pointer
!= '*'
1835 && *input_line_pointer
!= '!')
1836 as_warn (_("start address not supported"));
1840 /* Handle the .err pseudo-op. */
1843 s_err (int ignore ATTRIBUTE_UNUSED
)
1845 as_bad (_(".err encountered"));
1846 demand_empty_rest_of_line ();
1849 /* Handle the .error and .warning pseudo-ops. */
1855 /* The purpose for the conditional assignment is not to
1856 internationalize the directive itself, but that we need a
1857 self-contained message, one that can be passed like the
1858 demand_copy_C_string return value, and with no assumption on the
1859 location of the name of the directive within the message. */
1861 = (err
? _(".error directive invoked in source file")
1862 : _(".warning directive invoked in source file"));
1864 if (!is_it_end_of_statement ())
1866 if (*input_line_pointer
!= '\"')
1868 as_bad (_("%s argument must be a string"),
1869 err
? ".error" : ".warning");
1870 ignore_rest_of_line ();
1874 msg
= demand_copy_C_string (&len
);
1882 as_warn ("%s", msg
);
1883 demand_empty_rest_of_line ();
1886 /* Handle the MRI fail pseudo-op. */
1889 s_fail (int ignore ATTRIBUTE_UNUSED
)
1896 stop
= mri_comment_field (&stopc
);
1898 temp
= get_absolute_expression ();
1900 as_warn (_(".fail %ld encountered"), (long) temp
);
1902 as_bad (_(".fail %ld encountered"), (long) temp
);
1904 demand_empty_rest_of_line ();
1907 mri_comment_end (stop
, stopc
);
1911 s_fill (int ignore ATTRIBUTE_UNUSED
)
1913 expressionS rep_exp
;
1915 register long fill
= 0;
1918 #ifdef md_flush_pending_output
1919 md_flush_pending_output ();
1922 get_known_segmented_expression (&rep_exp
);
1923 if (*input_line_pointer
== ',')
1925 input_line_pointer
++;
1926 size
= get_absolute_expression ();
1927 if (*input_line_pointer
== ',')
1929 input_line_pointer
++;
1930 fill
= get_absolute_expression ();
1934 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1935 #define BSD_FILL_SIZE_CROCK_8 (8)
1936 if (size
> BSD_FILL_SIZE_CROCK_8
)
1938 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8
);
1939 size
= BSD_FILL_SIZE_CROCK_8
;
1943 as_warn (_("size negative; .fill ignored"));
1946 else if (rep_exp
.X_op
== O_constant
&& rep_exp
.X_add_number
<= 0)
1948 if (rep_exp
.X_add_number
< 0)
1949 as_warn (_("repeat < 0; .fill ignored"));
1953 if (size
&& !need_pass_2
)
1955 if (rep_exp
.X_op
== O_constant
)
1957 p
= frag_var (rs_fill
, (int) size
, (int) size
,
1958 (relax_substateT
) 0, (symbolS
*) 0,
1959 (offsetT
) rep_exp
.X_add_number
,
1964 /* We don't have a constant repeat count, so we can't use
1965 rs_fill. We can get the same results out of rs_space,
1966 but its argument is in bytes, so we must multiply the
1967 repeat count by size. */
1970 rep_sym
= make_expr_symbol (&rep_exp
);
1973 expressionS size_exp
;
1974 size_exp
.X_op
= O_constant
;
1975 size_exp
.X_add_number
= size
;
1977 rep_exp
.X_op
= O_multiply
;
1978 rep_exp
.X_add_symbol
= rep_sym
;
1979 rep_exp
.X_op_symbol
= make_expr_symbol (&size_exp
);
1980 rep_exp
.X_add_number
= 0;
1981 rep_sym
= make_expr_symbol (&rep_exp
);
1984 p
= frag_var (rs_space
, (int) size
, (int) size
,
1985 (relax_substateT
) 0, rep_sym
, (offsetT
) 0, (char *) 0);
1988 memset (p
, 0, (unsigned int) size
);
1990 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1991 flavoured AS. The following bizarre behaviour is to be
1992 compatible with above. I guess they tried to take up to 8
1993 bytes from a 4-byte expression and they forgot to sign
1995 #define BSD_FILL_SIZE_CROCK_4 (4)
1996 md_number_to_chars (p
, (valueT
) fill
,
1997 (size
> BSD_FILL_SIZE_CROCK_4
1998 ? BSD_FILL_SIZE_CROCK_4
2000 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
2001 but emits no error message because it seems a legal thing to do.
2002 It is a degenerate case of .fill but could be emitted by a
2005 demand_empty_rest_of_line ();
2009 s_globl (int ignore ATTRIBUTE_UNUSED
)
2018 stop
= mri_comment_field (&stopc
);
2022 name
= input_line_pointer
;
2023 c
= get_symbol_end ();
2024 symbolP
= symbol_find_or_make (name
);
2025 S_SET_EXTERNAL (symbolP
);
2027 *input_line_pointer
= c
;
2029 c
= *input_line_pointer
;
2032 input_line_pointer
++;
2034 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
2040 demand_empty_rest_of_line ();
2043 mri_comment_end (stop
, stopc
);
2047 #define skip_whitespace(str) do { if (*(str) == ' ') ++(str); } while (0)
2050 skip_past_char (char ** str
, char c
)
2060 #define skip_past_comma(str) skip_past_char (str, ',')
2062 /* Parse an attribute directive for VENDOR. */
2064 s_vendor_attribute (int vendor
)
2074 if (exp
.X_op
!= O_constant
)
2077 tag
= exp
.X_add_number
;
2078 type
= _bfd_elf_obj_attrs_arg_type (stdoutput
, vendor
, tag
);
2080 if (skip_past_comma (&input_line_pointer
) == -1)
2085 if (exp
.X_op
!= O_constant
)
2087 as_bad (_("expected numeric constant"));
2088 ignore_rest_of_line ();
2091 i
= exp
.X_add_number
;
2094 && skip_past_comma (&input_line_pointer
) == -1)
2096 as_bad (_("expected comma"));
2097 ignore_rest_of_line ();
2102 skip_whitespace(input_line_pointer
);
2103 if (*input_line_pointer
!= '"')
2105 input_line_pointer
++;
2106 s
= input_line_pointer
;
2107 while (*input_line_pointer
&& *input_line_pointer
!= '"')
2108 input_line_pointer
++;
2109 if (*input_line_pointer
!= '"')
2111 saved_char
= *input_line_pointer
;
2112 *input_line_pointer
= 0;
2123 bfd_elf_add_obj_attr_compat (stdoutput
, vendor
, i
, s
);
2126 bfd_elf_add_obj_attr_string (stdoutput
, vendor
, tag
, s
);
2129 bfd_elf_add_obj_attr_int (stdoutput
, vendor
, tag
, i
);
2137 *input_line_pointer
= saved_char
;
2138 input_line_pointer
++;
2140 demand_empty_rest_of_line ();
2143 as_bad (_("bad string constant"));
2144 ignore_rest_of_line ();
2147 as_bad (_("expected <tag> , <value>"));
2148 ignore_rest_of_line ();
2151 /* Parse a .gnu_attribute directive. */
2154 s_gnu_attribute (int ignored ATTRIBUTE_UNUSED
)
2156 s_vendor_attribute (OBJ_ATTR_GNU
);
2158 #endif /* OBJ_ELF */
2160 /* Handle the MRI IRP and IRPC pseudo-ops. */
2171 as_where (&file
, &line
);
2174 eol
= find_end_of_line (input_line_pointer
, 0);
2175 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2176 input_line_pointer
= eol
;
2180 err
= expand_irp (irpc
, 0, &s
, &out
, get_line_sb
);
2182 as_bad_where (file
, line
, "%s", err
);
2186 input_scrub_include_sb (&out
, input_line_pointer
, 1);
2188 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2191 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2192 the section to only be linked once. However, this is not supported
2193 by most object file formats. This takes an optional argument,
2194 which is what to do about duplicates. */
2197 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
2199 enum linkonce_type type
;
2203 type
= LINKONCE_DISCARD
;
2205 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
2210 s
= input_line_pointer
;
2211 c
= get_symbol_end ();
2212 if (strcasecmp (s
, "discard") == 0)
2213 type
= LINKONCE_DISCARD
;
2214 else if (strcasecmp (s
, "one_only") == 0)
2215 type
= LINKONCE_ONE_ONLY
;
2216 else if (strcasecmp (s
, "same_size") == 0)
2217 type
= LINKONCE_SAME_SIZE
;
2218 else if (strcasecmp (s
, "same_contents") == 0)
2219 type
= LINKONCE_SAME_CONTENTS
;
2221 as_warn (_("unrecognized .linkonce type `%s'"), s
);
2223 *input_line_pointer
= c
;
2226 #ifdef obj_handle_link_once
2227 obj_handle_link_once (type
);
2228 #else /* ! defined (obj_handle_link_once) */
2232 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
2233 as_warn (_(".linkonce is not supported for this object file format"));
2235 flags
= bfd_get_section_flags (stdoutput
, now_seg
);
2236 flags
|= SEC_LINK_ONCE
;
2241 case LINKONCE_DISCARD
:
2242 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
2244 case LINKONCE_ONE_ONLY
:
2245 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
2247 case LINKONCE_SAME_SIZE
:
2248 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
2250 case LINKONCE_SAME_CONTENTS
:
2251 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
2254 if (!bfd_set_section_flags (stdoutput
, now_seg
, flags
))
2255 as_bad (_("bfd_set_section_flags: %s"),
2256 bfd_errmsg (bfd_get_error ()));
2258 #endif /* ! defined (obj_handle_link_once) */
2260 demand_empty_rest_of_line ();
2264 bss_alloc (symbolS
*symbolP
, addressT size
, int align
)
2267 segT current_seg
= now_seg
;
2268 subsegT current_subseg
= now_subseg
;
2269 segT bss_seg
= bss_section
;
2271 #if defined (TC_MIPS) || defined (TC_ALPHA)
2272 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
2273 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
2275 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2276 if (size
<= bfd_get_gp_size (stdoutput
))
2278 bss_seg
= subseg_new (".sbss", 1);
2279 seg_info (bss_seg
)->bss
= 1;
2280 if (!bfd_set_section_flags (stdoutput
, bss_seg
, SEC_ALLOC
))
2281 as_warn (_("error setting flags for \".sbss\": %s"),
2282 bfd_errmsg (bfd_get_error ()));
2286 subseg_set (bss_seg
, 1);
2290 record_alignment (bss_seg
, align
);
2291 frag_align (align
, 0, 0);
2294 /* Detach from old frag. */
2295 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2296 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2298 symbol_set_frag (symbolP
, frag_now
);
2299 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
, NULL
);
2303 S_SET_SIZE (symbolP
, size
);
2305 S_SET_SEGMENT (symbolP
, bss_seg
);
2308 /* The symbol may already have been created with a preceding
2309 ".globl" directive -- be careful not to step on storage class
2310 in that case. Otherwise, set it to static. */
2311 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2312 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2313 #endif /* OBJ_COFF */
2315 subseg_set (current_seg
, current_subseg
);
2319 parse_align (int align_bytes
)
2325 if (*input_line_pointer
!= ',')
2328 as_bad (_("expected alignment after size"));
2329 ignore_rest_of_line ();
2333 input_line_pointer
++;
2336 align
= get_absolute_expr (&exp
);
2337 if (exp
.X_op
== O_absent
)
2340 if (!exp
.X_unsigned
)
2342 as_warn (_("alignment negative; 0 assumed"));
2346 if (align_bytes
&& align
!= 0)
2348 /* convert to a power of 2 alignment */
2349 unsigned int alignp2
= 0;
2350 while ((align
& 1) == 0)
2351 align
>>= 1, ++alignp2
;
2354 as_bad (_("alignment not a power of 2"));
2355 ignore_rest_of_line ();
2363 /* Called from s_comm_internal after symbol name and size have been
2364 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2365 1 if this was a ".bss" directive which has a 3rd argument
2366 (alignment as a power of 2), or 2 if this was a ".bss" directive
2367 with alignment in bytes. */
2370 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2376 align
= parse_align (needs_align
- 1);
2377 if (align
== (addressT
) -1)
2381 /* Assume some objects may require alignment on some systems. */
2382 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2384 bss_alloc (symbolP
, size
, align
);
2389 s_lcomm (int needs_align
)
2391 s_comm_internal (needs_align
, s_lcomm_internal
);
2395 s_lcomm_bytes (int needs_align
)
2397 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2401 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2403 register char *name
;
2407 register symbolS
*symbolP
;
2409 /* We permit ANY defined expression: BSD4.2 demands constants. */
2410 name
= input_line_pointer
;
2411 c
= get_symbol_end ();
2412 p
= input_line_pointer
;
2417 as_bad (_("expected symbol name"));
2418 ignore_rest_of_line ();
2424 if (*input_line_pointer
!= ',')
2427 as_bad (_("expected comma after \"%s\""), name
);
2429 ignore_rest_of_line ();
2433 input_line_pointer
++;
2434 expression_and_evaluate (&exp
);
2436 if (exp
.X_op
!= O_constant
2437 && exp
.X_op
!= O_register
)
2439 as_bad (_("bad expression"));
2440 ignore_rest_of_line ();
2445 symbolP
= symbol_find_or_make (name
);
2447 if (S_GET_SEGMENT (symbolP
) == undefined_section
)
2449 /* The name might be an undefined .global symbol; be sure to
2450 keep the "external" bit. */
2451 S_SET_SEGMENT (symbolP
,
2452 (exp
.X_op
== O_constant
2455 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2459 as_bad (_("symbol `%s' is already defined"), name
);
2463 demand_empty_rest_of_line ();
2466 /* Read a line into an sb. Returns the character that ended the line
2467 or zero if there are no more lines. */
2470 get_line_sb (sb
*line
)
2474 if (input_line_pointer
[-1] == '\n')
2475 bump_line_counters ();
2477 if (input_line_pointer
>= buffer_limit
)
2479 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2480 if (buffer_limit
== 0)
2484 eol
= find_end_of_line (input_line_pointer
, flag_m68k_mri
);
2485 sb_add_buffer (line
, input_line_pointer
, eol
- input_line_pointer
);
2486 input_line_pointer
= eol
;
2488 /* Don't skip multiple end-of-line characters, because that breaks support
2489 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2490 characters but isn't. Instead just skip one end of line character and
2491 return the character skipped so that the caller can re-insert it if
2493 return *input_line_pointer
++;
2496 /* Define a macro. This is an interface to macro.c. */
2499 s_macro (int ignore ATTRIBUTE_UNUSED
)
2507 as_where (&file
, &line
);
2510 eol
= find_end_of_line (input_line_pointer
, 0);
2511 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2512 input_line_pointer
= eol
;
2514 if (line_label
!= NULL
)
2519 sb_add_string (&label
, S_GET_NAME (line_label
));
2520 err
= define_macro (0, &s
, &label
, get_line_sb
, file
, line
, &name
);
2524 err
= define_macro (0, &s
, NULL
, get_line_sb
, file
, line
, &name
);
2526 as_bad_where (file
, line
, err
, name
);
2529 if (line_label
!= NULL
)
2531 S_SET_SEGMENT (line_label
, absolute_section
);
2532 S_SET_VALUE (line_label
, 0);
2533 symbol_set_frag (line_label
, &zero_address_frag
);
2536 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2537 && hash_find (po_hash
, name
) != NULL
)
2540 && hash_find (po_hash
, name
+ 1) != NULL
))
2541 as_warn_where (file
,
2543 _("attempt to redefine pseudo-op `%s' ignored"),
2550 /* Handle the .mexit pseudo-op, which immediately exits a macro
2554 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2556 cond_exit_macro (macro_nest
);
2557 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2560 /* Switch in and out of MRI mode. */
2563 s_mri (int ignore ATTRIBUTE_UNUSED
)
2567 on
= get_absolute_expression ();
2568 old_flag
= flag_mri
;
2586 /* Operator precedence changes in m68k MRI mode, so we need to
2587 update the operator rankings. */
2588 expr_set_precedence ();
2590 #ifdef MRI_MODE_CHANGE
2592 MRI_MODE_CHANGE (on
);
2595 demand_empty_rest_of_line ();
2598 /* Handle changing the location counter. */
2601 do_org (segT segment
, expressionS
*exp
, int fill
)
2603 if (segment
!= now_seg
&& segment
!= absolute_section
)
2604 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2606 if (now_seg
== absolute_section
)
2609 as_warn (_("ignoring fill value in absolute section"));
2610 if (exp
->X_op
!= O_constant
)
2612 as_bad (_("only constant offsets supported in absolute section"));
2613 exp
->X_add_number
= 0;
2615 abs_section_offset
= exp
->X_add_number
;
2620 symbolS
*sym
= exp
->X_add_symbol
;
2621 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2623 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2625 /* Handle complex expressions. */
2626 sym
= make_expr_symbol (exp
);
2630 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2636 s_org (int ignore ATTRIBUTE_UNUSED
)
2638 register segT segment
;
2640 register long temp_fill
;
2642 #ifdef md_flush_pending_output
2643 md_flush_pending_output ();
2646 /* The m68k MRI assembler has a different meaning for .org. It
2647 means to create an absolute section at a given address. We can't
2648 support that--use a linker script instead. */
2651 as_bad (_("MRI style ORG pseudo-op not supported"));
2652 ignore_rest_of_line ();
2656 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2657 thing as a sub-segment-relative origin. Any absolute origin is
2658 given a warning, then assumed to be segment-relative. Any
2659 segmented origin expression ("foo+42") had better be in the right
2660 segment or the .org is ignored.
2662 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2663 we never know sub-segment sizes when we are reading code. BSD
2664 will crash trying to emit negative numbers of filler bytes in
2665 certain .orgs. We don't crash, but see as-write for that code.
2667 Don't make frag if need_pass_2==1. */
2668 segment
= get_known_segmented_expression (&exp
);
2669 if (*input_line_pointer
== ',')
2671 input_line_pointer
++;
2672 temp_fill
= get_absolute_expression ();
2678 do_org (segment
, &exp
, temp_fill
);
2680 demand_empty_rest_of_line ();
2683 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2684 called by the obj-format routine which handles section changing
2685 when in MRI mode. It will create a new section, and return it. It
2686 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2687 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2690 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2700 name
= input_line_pointer
;
2701 if (!ISDIGIT (*name
))
2702 c
= get_symbol_end ();
2707 ++input_line_pointer
;
2709 while (ISDIGIT (*input_line_pointer
));
2711 c
= *input_line_pointer
;
2712 *input_line_pointer
= '\0';
2715 name
= xstrdup (name
);
2717 *input_line_pointer
= c
;
2719 seg
= subseg_new (name
, 0);
2721 if (*input_line_pointer
== ',')
2725 ++input_line_pointer
;
2726 align
= get_absolute_expression ();
2727 record_alignment (seg
, align
);
2731 if (*input_line_pointer
== ',')
2733 c
= *++input_line_pointer
;
2735 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
2738 as_bad (_("unrecognized section type"));
2739 ++input_line_pointer
;
2744 flags
= SEC_NO_FLAGS
;
2746 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
2747 else if (*type
== 'D' || *type
== 'M')
2748 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
2749 else if (*type
== 'R')
2750 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
2751 if (flags
!= SEC_NO_FLAGS
)
2753 if (!bfd_set_section_flags (stdoutput
, seg
, flags
))
2754 as_warn (_("error setting flags for \"%s\": %s"),
2755 bfd_section_name (stdoutput
, seg
),
2756 bfd_errmsg (bfd_get_error ()));
2761 /* Ignore the HP type. */
2762 if (*input_line_pointer
== ',')
2763 input_line_pointer
+= 2;
2765 demand_empty_rest_of_line ();
2767 #else /* ! TC_M68K */
2776 name
= input_line_pointer
;
2777 c
= get_symbol_end ();
2779 name
= xstrdup (name
);
2781 *input_line_pointer
= c
;
2783 seg
= subseg_new (name
, 0);
2785 if (*input_line_pointer
!= ',')
2791 ++input_line_pointer
;
2793 sectype
= input_line_pointer
;
2794 c
= get_symbol_end ();
2795 if (*sectype
== '\0')
2797 else if (strcasecmp (sectype
, "text") == 0)
2799 else if (strcasecmp (sectype
, "data") == 0)
2801 else if (strcasecmp (sectype
, "romdata") == 0)
2804 as_warn (_("unrecognized section type `%s'"), sectype
);
2805 *input_line_pointer
= c
;
2808 if (*input_line_pointer
== ',')
2812 ++input_line_pointer
;
2814 seccmd
= input_line_pointer
;
2815 c
= get_symbol_end ();
2816 if (strcasecmp (seccmd
, "absolute") == 0)
2818 as_bad (_("absolute sections are not supported"));
2819 *input_line_pointer
= c
;
2820 ignore_rest_of_line ();
2823 else if (strcasecmp (seccmd
, "align") == 0)
2827 *input_line_pointer
= c
;
2828 align
= get_absolute_expression ();
2829 record_alignment (seg
, align
);
2833 as_warn (_("unrecognized section command `%s'"), seccmd
);
2834 *input_line_pointer
= c
;
2838 demand_empty_rest_of_line ();
2840 #else /* ! TC_I960 */
2841 /* The MRI assembler seems to use different forms of .sect for
2842 different targets. */
2843 as_bad ("MRI mode not supported for this target");
2844 ignore_rest_of_line ();
2845 #endif /* ! TC_I960 */
2846 #endif /* ! TC_M68K */
2849 /* Handle the .print pseudo-op. */
2852 s_print (int ignore ATTRIBUTE_UNUSED
)
2857 s
= demand_copy_C_string (&len
);
2860 demand_empty_rest_of_line ();
2863 /* Handle the .purgem pseudo-op. */
2866 s_purgem (int ignore ATTRIBUTE_UNUSED
)
2868 if (is_it_end_of_statement ())
2870 demand_empty_rest_of_line ();
2880 name
= input_line_pointer
;
2881 c
= get_symbol_end ();
2882 delete_macro (name
);
2883 *input_line_pointer
= c
;
2886 while (*input_line_pointer
++ == ',');
2888 --input_line_pointer
;
2889 demand_empty_rest_of_line ();
2892 /* Handle the .endm/.endr pseudo-ops. */
2895 s_bad_end (int endr
)
2897 as_warn (_(".end%c encountered without preceeding %s"),
2899 endr
? ".rept, .irp, or .irpc" : ".macro");
2900 demand_empty_rest_of_line ();
2903 /* Handle the .rept pseudo-op. */
2906 s_rept (int ignore ATTRIBUTE_UNUSED
)
2910 count
= get_absolute_expression ();
2912 do_repeat (count
, "REPT", "ENDR");
2915 /* This function provides a generic repeat block implementation. It allows
2916 different directives to be used as the start/end keys. */
2919 do_repeat (int count
, const char *start
, const char *end
)
2925 if (!buffer_and_nest (start
, end
, &one
, get_line_sb
))
2927 as_bad (_("%s without %s"), start
, end
);
2933 sb_add_sb (&many
, &one
);
2937 input_scrub_include_sb (&many
, input_line_pointer
, 1);
2939 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2942 /* Skip to end of current repeat loop; EXTRA indicates how many additional
2943 input buffers to skip. Assumes that conditionals preceding the loop end
2944 are properly nested.
2946 This function makes it easier to implement a premature "break" out of the
2947 loop. The EXTRA arg accounts for other buffers we might have inserted,
2948 such as line substitutions. */
2951 end_repeat (int extra
)
2953 cond_exit_macro (macro_nest
);
2954 while (extra
-- >= 0)
2955 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2959 assign_symbol (char *name
, int mode
)
2963 if (name
[0] == '.' && name
[1] == '\0')
2965 /* Turn '. = mumble' into a .org mumble. */
2969 segment
= get_known_segmented_expression (&exp
);
2972 do_org (segment
, &exp
, 0);
2977 if ((symbolP
= symbol_find (name
)) == NULL
2978 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
2980 symbolP
= symbol_find_or_make (name
);
2982 /* When doing symbol listings, play games with dummy fragments living
2983 outside the normal fragment chain to record the file and line info
2985 if (listing
& LISTING_SYMBOLS
)
2987 extern struct list_info_struct
*listing_tail
;
2988 fragS
*dummy_frag
= (fragS
*) xcalloc (1, sizeof (fragS
));
2989 dummy_frag
->line
= listing_tail
;
2990 dummy_frag
->fr_symbol
= symbolP
;
2991 symbol_set_frag (symbolP
, dummy_frag
);
2995 /* "set" symbols are local unless otherwise specified. */
2996 SF_SET_LOCAL (symbolP
);
3000 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3002 /* Permit register names to be redefined. */
3003 if ((mode
!= 0 || !S_IS_VOLATILE (symbolP
))
3004 && S_GET_SEGMENT (symbolP
) != reg_section
)
3006 as_bad (_("symbol `%s' is already defined"), name
);
3007 symbolP
= symbol_clone (symbolP
, 0);
3009 /* If the symbol is volatile, copy the symbol and replace the
3010 original with the copy, so that previous uses of the symbol will
3011 retain the value of the symbol at the point of use. */
3012 else if (S_IS_VOLATILE (symbolP
))
3013 symbolP
= symbol_clone (symbolP
, 1);
3017 S_SET_VOLATILE (symbolP
);
3019 S_SET_FORWARD_REF (symbolP
);
3021 pseudo_set (symbolP
);
3024 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3025 then this is .equiv, and it is an error if the symbol is already
3026 defined. If EQUIV is -1, the symbol additionally is a forward
3036 /* Especial apologies for the random logic:
3037 this just grew, and could be parsed much more simply!
3039 name
= input_line_pointer
;
3040 delim
= get_symbol_end ();
3041 end_name
= input_line_pointer
;
3044 if (name
== end_name
)
3046 as_bad (_("expected symbol name"));
3047 ignore_rest_of_line ();
3053 if (*input_line_pointer
!= ',')
3056 as_bad (_("expected comma after \"%s\""), name
);
3058 ignore_rest_of_line ();
3062 input_line_pointer
++;
3065 assign_symbol (name
, equiv
);
3068 demand_empty_rest_of_line ();
3081 #ifdef md_flush_pending_output
3082 md_flush_pending_output ();
3086 stop
= mri_comment_field (&stopc
);
3088 /* In m68k MRI mode, we need to align to a word boundary, unless
3090 if (flag_m68k_mri
&& mult
> 1)
3092 if (now_seg
== absolute_section
)
3094 abs_section_offset
+= abs_section_offset
& 1;
3095 if (line_label
!= NULL
)
3096 S_SET_VALUE (line_label
, abs_section_offset
);
3098 else if (mri_common_symbol
!= NULL
)
3102 val
= S_GET_VALUE (mri_common_symbol
);
3105 S_SET_VALUE (mri_common_symbol
, val
+ 1);
3106 if (line_label
!= NULL
)
3108 expressionS
*symexp
;
3110 symexp
= symbol_get_value_expression (line_label
);
3111 know (symexp
->X_op
== O_symbol
);
3112 know (symexp
->X_add_symbol
== mri_common_symbol
);
3113 symexp
->X_add_number
+= 1;
3119 do_align (1, (char *) NULL
, 0, 0);
3120 if (line_label
!= NULL
)
3122 symbol_set_frag (line_label
, frag_now
);
3123 S_SET_VALUE (line_label
, frag_now_fix ());
3133 if (*input_line_pointer
== ',')
3135 ++input_line_pointer
;
3140 val
.X_op
= O_constant
;
3141 val
.X_add_number
= 0;
3144 if (val
.X_op
!= O_constant
3145 || val
.X_add_number
< - 0x80
3146 || val
.X_add_number
> 0xff
3147 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
3149 resolve_expression (&exp
);
3150 if (exp
.X_op
!= O_constant
)
3151 as_bad (_("unsupported variable size or fill value"));
3158 bytes
= mult
* exp
.X_add_number
;
3159 for (i
= 0; i
< exp
.X_add_number
; i
++)
3160 emit_expr (&val
, mult
);
3165 if (now_seg
== absolute_section
|| mri_common_symbol
!= NULL
)
3166 resolve_expression (&exp
);
3168 if (exp
.X_op
== O_constant
)
3172 repeat
= exp
.X_add_number
;
3179 as_warn (_(".space repeat count is zero, ignored"));
3180 else if (repeat
< 0)
3181 as_warn (_(".space repeat count is negative, ignored"));
3185 /* If we are in the absolute section, just bump the offset. */
3186 if (now_seg
== absolute_section
)
3188 abs_section_offset
+= repeat
;
3192 /* If we are secretly in an MRI common section, then
3193 creating space just increases the size of the common
3195 if (mri_common_symbol
!= NULL
)
3197 S_SET_VALUE (mri_common_symbol
,
3198 S_GET_VALUE (mri_common_symbol
) + repeat
);
3203 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
3204 (offsetT
) repeat
, (char *) 0);
3208 if (now_seg
== absolute_section
)
3210 as_bad (_("space allocation too complex in absolute section"));
3211 subseg_set (text_section
, 0);
3214 if (mri_common_symbol
!= NULL
)
3216 as_bad (_("space allocation too complex in common section"));
3217 mri_common_symbol
= NULL
;
3221 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
3222 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
3226 *p
= val
.X_add_number
;
3231 /* In MRI mode, after an odd number of bytes, we must align to an
3232 even word boundary, unless the next instruction is a dc.b, ds.b
3234 if (flag_mri
&& (bytes
& 1) != 0)
3235 mri_pending_align
= 1;
3237 demand_empty_rest_of_line ();
3240 mri_comment_end (stop
, stopc
);
3243 /* This is like s_space, but the value is a floating point number with
3244 the given precision. This is for the MRI dcb.s pseudo-op and
3248 s_float_space (int float_type
)
3252 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
3257 stop
= mri_comment_field (&stopc
);
3259 count
= get_absolute_expression ();
3262 if (*input_line_pointer
!= ',')
3264 as_bad (_("missing value"));
3265 ignore_rest_of_line ();
3267 mri_comment_end (stop
, stopc
);
3271 ++input_line_pointer
;
3275 /* Skip any 0{letter} that may be present. Don't even check if the
3276 * letter is legal. */
3277 if (input_line_pointer
[0] == '0'
3278 && ISALPHA (input_line_pointer
[1]))
3279 input_line_pointer
+= 2;
3281 /* Accept :xxxx, where the x's are hex digits, for a floating point
3282 with the exact digits specified. */
3283 if (input_line_pointer
[0] == ':')
3285 flen
= hex_float (float_type
, temp
);
3288 ignore_rest_of_line ();
3290 mri_comment_end (stop
, stopc
);
3298 err
= md_atof (float_type
, temp
, &flen
);
3299 know (flen
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3303 as_bad (_("bad floating literal: %s"), err
);
3304 ignore_rest_of_line ();
3306 mri_comment_end (stop
, stopc
);
3311 while (--count
>= 0)
3315 p
= frag_more (flen
);
3316 memcpy (p
, temp
, (unsigned int) flen
);
3319 demand_empty_rest_of_line ();
3322 mri_comment_end (stop
, stopc
);
3325 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3328 s_struct (int ignore ATTRIBUTE_UNUSED
)
3334 stop
= mri_comment_field (&stopc
);
3335 abs_section_offset
= get_absolute_expression ();
3336 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3337 /* The ELF backend needs to know that we are changing sections, so
3338 that .previous works correctly. */
3340 obj_elf_section_change_hook ();
3342 subseg_set (absolute_section
, 0);
3343 demand_empty_rest_of_line ();
3345 mri_comment_end (stop
, stopc
);
3349 s_text (int ignore ATTRIBUTE_UNUSED
)
3353 temp
= get_absolute_expression ();
3354 subseg_set (text_section
, (subsegT
) temp
);
3355 demand_empty_rest_of_line ();
3357 const_flag
&= ~IN_DEFAULT_SECTION
;
3361 /* .weakref x, y sets x as an alias to y that, as long as y is not
3362 referenced directly, will cause y to become a weak symbol. */
3364 s_weakref (int ignore ATTRIBUTE_UNUSED
)
3373 name
= input_line_pointer
;
3374 delim
= get_symbol_end ();
3375 end_name
= input_line_pointer
;
3377 if (name
== end_name
)
3379 as_bad (_("expected symbol name"));
3381 ignore_rest_of_line ();
3385 symbolP
= symbol_find_or_make (name
);
3387 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3389 if (!S_IS_VOLATILE (symbolP
))
3391 as_bad (_("symbol `%s' is already defined"), name
);
3393 ignore_rest_of_line ();
3396 symbolP
= symbol_clone (symbolP
, 1);
3397 S_CLEAR_VOLATILE (symbolP
);
3404 if (*input_line_pointer
!= ',')
3407 as_bad (_("expected comma after \"%s\""), name
);
3409 ignore_rest_of_line ();
3413 input_line_pointer
++;
3417 name
= input_line_pointer
;
3418 delim
= get_symbol_end ();
3419 end_name
= input_line_pointer
;
3421 if (name
== end_name
)
3423 as_bad (_("expected symbol name"));
3424 ignore_rest_of_line ();
3428 if ((symbolP2
= symbol_find_noref (name
, 1)) == NULL
3429 && (symbolP2
= md_undefined_symbol (name
)) == NULL
)
3431 symbolP2
= symbol_find_or_make (name
);
3432 S_SET_WEAKREFD (symbolP2
);
3436 symbolS
*symp
= symbolP2
;
3438 while (S_IS_WEAKREFR (symp
) && symp
!= symbolP
)
3440 expressionS
*expP
= symbol_get_value_expression (symp
);
3442 assert (expP
->X_op
== O_symbol
3443 && expP
->X_add_number
== 0);
3444 symp
= expP
->X_add_symbol
;
3446 if (symp
== symbolP
)
3450 loop
= concat (S_GET_NAME (symbolP
),
3451 " => ", S_GET_NAME (symbolP2
), NULL
);
3454 while (symp
!= symbolP
)
3456 char *old_loop
= loop
;
3457 symp
= symbol_get_value_expression (symp
)->X_add_symbol
;
3458 loop
= concat (loop
, " => ", S_GET_NAME (symp
), NULL
);
3462 as_bad (_("%s: would close weakref loop: %s"),
3463 S_GET_NAME (symbolP
), loop
);
3468 ignore_rest_of_line ();
3472 /* Short-circuiting instead of just checking here might speed
3473 things up a tiny little bit, but loop error messages would
3474 miss intermediate links. */
3475 /* symbolP2 = symp; */
3480 memset (&exp
, 0, sizeof (exp
));
3481 exp
.X_op
= O_symbol
;
3482 exp
.X_add_symbol
= symbolP2
;
3484 S_SET_SEGMENT (symbolP
, undefined_section
);
3485 symbol_set_value_expression (symbolP
, &exp
);
3486 symbol_set_frag (symbolP
, &zero_address_frag
);
3487 S_SET_WEAKREFR (symbolP
);
3489 demand_empty_rest_of_line ();
3493 /* Verify that we are at the end of a line. If not, issue an error and
3497 demand_empty_rest_of_line (void)
3500 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3501 input_line_pointer
++;
3504 if (ISPRINT (*input_line_pointer
))
3505 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3506 *input_line_pointer
);
3508 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3509 *input_line_pointer
);
3510 ignore_rest_of_line ();
3513 /* Return pointing just after end-of-line. */
3514 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3517 /* Silently advance to the end of line. Use this after already having
3518 issued an error about something bad. */
3521 ignore_rest_of_line (void)
3523 while (input_line_pointer
< buffer_limit
3524 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3525 input_line_pointer
++;
3527 input_line_pointer
++;
3529 /* Return pointing just after end-of-line. */
3530 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3533 /* Sets frag for given symbol to zero_address_frag, except when the
3534 symbol frag is already set to a dummy listing frag. */
3537 set_zero_frag (symbolS
*symbolP
)
3539 if (symbol_get_frag (symbolP
)->fr_type
!= rs_dummy
)
3540 symbol_set_frag (symbolP
, &zero_address_frag
);
3543 /* In: Pointer to a symbol.
3544 Input_line_pointer->expression.
3546 Out: Input_line_pointer->just after any whitespace after expression.
3547 Tried to set symbol to value of expression.
3548 Will change symbols type, value, and frag; */
3551 pseudo_set (symbolS
*symbolP
)
3556 know (symbolP
); /* NULL pointer is logic error. */
3558 if (!S_IS_FORWARD_REF (symbolP
))
3559 (void) expression (&exp
);
3561 (void) deferred_expression (&exp
);
3563 if (exp
.X_op
== O_illegal
)
3564 as_bad (_("illegal expression"));
3565 else if (exp
.X_op
== O_absent
)
3566 as_bad (_("missing expression"));
3567 else if (exp
.X_op
== O_big
)
3569 if (exp
.X_add_number
> 0)
3570 as_bad (_("bignum invalid"));
3572 as_bad (_("floating point number invalid"));
3574 else if (exp
.X_op
== O_subtract
3575 && !S_IS_FORWARD_REF (symbolP
)
3576 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
3577 && (symbol_get_frag (exp
.X_add_symbol
)
3578 == symbol_get_frag (exp
.X_op_symbol
)))
3580 exp
.X_op
= O_constant
;
3581 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
3582 - S_GET_VALUE (exp
.X_op_symbol
));
3585 if (symbol_section_p (symbolP
))
3587 as_bad ("attempt to set value of section symbol");
3596 exp
.X_add_number
= 0;
3599 S_SET_SEGMENT (symbolP
, absolute_section
);
3600 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3601 set_zero_frag (symbolP
);
3605 S_SET_SEGMENT (symbolP
, reg_section
);
3606 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3607 set_zero_frag (symbolP
);
3608 symbol_get_value_expression (symbolP
)->X_op
= O_register
;
3612 seg
= S_GET_SEGMENT (exp
.X_add_symbol
);
3613 /* For x=undef+const, create an expression symbol.
3614 For x=x+const, just update x except when x is an undefined symbol
3615 For x=defined+const, evaluate x. */
3616 if (symbolP
== exp
.X_add_symbol
3617 && (seg
!= undefined_section
3618 || !symbol_constant_p (symbolP
)))
3620 *symbol_X_add_number (symbolP
) += exp
.X_add_number
;
3623 else if (!S_IS_FORWARD_REF (symbolP
) && seg
!= undefined_section
)
3625 symbolS
*s
= exp
.X_add_symbol
;
3627 if (S_IS_COMMON (s
))
3628 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3629 S_GET_NAME (symbolP
), S_GET_NAME (s
));
3631 S_SET_SEGMENT (symbolP
, seg
);
3632 S_SET_VALUE (symbolP
, exp
.X_add_number
+ S_GET_VALUE (s
));
3633 symbol_set_frag (symbolP
, symbol_get_frag (s
));
3634 copy_symbol_attributes (symbolP
, s
);
3637 S_SET_SEGMENT (symbolP
, undefined_section
);
3638 symbol_set_value_expression (symbolP
, &exp
);
3639 set_zero_frag (symbolP
);
3643 /* The value is some complex expression. */
3644 S_SET_SEGMENT (symbolP
, expr_section
);
3645 symbol_set_value_expression (symbolP
, &exp
);
3646 set_zero_frag (symbolP
);
3653 CONStruct more frag of .bytes, or .words etc.
3654 Should need_pass_2 be 1 then emit no frag(s).
3655 This understands EXPRESSIONS.
3659 This has a split personality. We use expression() to read the
3660 value. We can detect if the value won't fit in a byte or word.
3661 But we can't detect if expression() discarded significant digits
3662 in the case of a long. Not worth the crocks required to fix it. */
3664 /* Select a parser for cons expressions. */
3666 /* Some targets need to parse the expression in various fancy ways.
3667 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3668 (for example, the HPPA does this). Otherwise, you can define
3669 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3670 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3671 are defined, which is the normal case, then only simple expressions
3676 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
3679 #ifndef TC_PARSE_CONS_EXPRESSION
3680 #ifdef BITFIELD_CONS_EXPRESSIONS
3681 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3683 parse_bitfield_cons (expressionS
*exp
, unsigned int nbytes
);
3685 #ifdef REPEAT_CONS_EXPRESSIONS
3686 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3688 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
3691 /* If we haven't gotten one yet, just call expression. */
3692 #ifndef TC_PARSE_CONS_EXPRESSION
3693 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3698 do_parse_cons_expression (expressionS
*exp
,
3699 int nbytes ATTRIBUTE_UNUSED
)
3701 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3705 /* Worker to do .byte etc statements.
3706 Clobbers input_line_pointer and checks end-of-line. */
3709 cons_worker (register int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
3717 #ifdef md_flush_pending_output
3718 md_flush_pending_output ();
3722 stop
= mri_comment_field (&stopc
);
3724 if (is_it_end_of_statement ())
3726 demand_empty_rest_of_line ();
3728 mri_comment_end (stop
, stopc
);
3732 #ifdef TC_ADDRESS_BYTES
3734 nbytes
= TC_ADDRESS_BYTES ();
3737 #ifdef md_cons_align
3738 md_cons_align (nbytes
);
3746 parse_mri_cons (&exp
, (unsigned int) nbytes
);
3749 TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
3753 if (exp
.X_op
== O_symbol
)
3754 exp
.X_op
= O_symbol_rva
;
3756 as_fatal (_("rva without symbol"));
3758 emit_expr (&exp
, (unsigned int) nbytes
);
3761 while (*input_line_pointer
++ == ',');
3763 /* In MRI mode, after an odd number of bytes, we must align to an
3764 even word boundary, unless the next instruction is a dc.b, ds.b
3766 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
3767 mri_pending_align
= 1;
3769 input_line_pointer
--; /* Put terminator back into stream. */
3771 demand_empty_rest_of_line ();
3774 mri_comment_end (stop
, stopc
);
3780 cons_worker (size
, 0);
3786 cons_worker (size
, 1);
3789 /* .reloc offset, reloc_name, symbol+addend. */
3792 s_reloc (int ignore ATTRIBUTE_UNUSED
)
3799 struct reloc_list
*reloc
;
3801 reloc
= xmalloc (sizeof (*reloc
));
3804 stop
= mri_comment_field (&stopc
);
3813 as_bad (_("missing or bad offset expression"));
3816 exp
.X_add_symbol
= section_symbol (now_seg
);
3817 exp
.X_op
= O_symbol
;
3820 if (exp
.X_add_number
== 0)
3822 reloc
->u
.a
.offset_sym
= exp
.X_add_symbol
;
3827 reloc
->u
.a
.offset_sym
= make_expr_symbol (&exp
);
3832 if (*input_line_pointer
!= ',')
3834 as_bad (_("missing reloc type"));
3838 ++input_line_pointer
;
3840 r_name
= input_line_pointer
;
3841 c
= get_symbol_end ();
3842 reloc
->u
.a
.howto
= bfd_reloc_name_lookup (stdoutput
, r_name
);
3843 *input_line_pointer
= c
;
3844 if (reloc
->u
.a
.howto
== NULL
)
3846 as_bad (_("unrecognized reloc type"));
3850 exp
.X_op
= O_absent
;
3852 if (*input_line_pointer
== ',')
3854 ++input_line_pointer
;
3855 expression_and_evaluate (&exp
);
3862 as_bad (_("bad reloc expression"));
3864 ignore_rest_of_line ();
3867 mri_comment_end (stop
, stopc
);
3870 reloc
->u
.a
.sym
= NULL
;
3871 reloc
->u
.a
.addend
= 0;
3874 reloc
->u
.a
.sym
= NULL
;
3875 reloc
->u
.a
.addend
= exp
.X_add_number
;
3878 reloc
->u
.a
.sym
= exp
.X_add_symbol
;
3879 reloc
->u
.a
.addend
= exp
.X_add_number
;
3882 reloc
->u
.a
.sym
= make_expr_symbol (&exp
);
3883 reloc
->u
.a
.addend
= 0;
3887 as_where (&reloc
->file
, &reloc
->line
);
3888 reloc
->next
= reloc_list
;
3891 demand_empty_rest_of_line ();
3893 mri_comment_end (stop
, stopc
);
3896 /* Put the contents of expression EXP into the object file using
3897 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3900 emit_expr (expressionS
*exp
, unsigned int nbytes
)
3904 valueT extra_digit
= 0;
3906 /* Don't do anything if we are going to make another pass. */
3910 dot_value
= frag_now_fix ();
3914 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3915 appear as a four byte positive constant in the .line section,
3916 followed by a 2 byte 0xffff. Look for that case here. */
3918 static int dwarf_line
= -1;
3920 if (strcmp (segment_name (now_seg
), ".line") != 0)
3922 else if (dwarf_line
>= 0
3924 && exp
->X_op
== O_constant
3925 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
3926 listing_source_line ((unsigned int) dwarf_line
);
3927 else if (nbytes
== 4
3928 && exp
->X_op
== O_constant
3929 && exp
->X_add_number
>= 0)
3930 dwarf_line
= exp
->X_add_number
;
3935 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3936 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3937 AT_sibling (0x12) followed by a four byte address of the sibling
3938 followed by a 2 byte AT_name (0x38) followed by the name of the
3939 file. We look for that case here. */
3941 static int dwarf_file
= 0;
3943 if (strcmp (segment_name (now_seg
), ".debug") != 0)
3945 else if (dwarf_file
== 0
3947 && exp
->X_op
== O_constant
3948 && exp
->X_add_number
== 0x11)
3950 else if (dwarf_file
== 1
3952 && exp
->X_op
== O_constant
3953 && exp
->X_add_number
== 0x12)
3955 else if (dwarf_file
== 2
3958 else if (dwarf_file
== 3
3960 && exp
->X_op
== O_constant
3961 && exp
->X_add_number
== 0x38)
3966 /* The variable dwarf_file_string tells stringer that the string
3967 may be the name of the source file. */
3968 if (dwarf_file
== 4)
3969 dwarf_file_string
= 1;
3971 dwarf_file_string
= 0;
3976 if (check_eh_frame (exp
, &nbytes
))
3981 /* Allow `.word 0' in the absolute section. */
3982 if (now_seg
== absolute_section
)
3984 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
3985 as_bad (_("attempt to store value in absolute section"));
3986 abs_section_offset
+= nbytes
;
3990 /* Handle a negative bignum. */
3992 && exp
->X_add_number
== 0
3993 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
3994 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
3997 unsigned long carry
;
3999 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
4001 /* Negate the bignum: one's complement each digit and add 1. */
4003 for (i
= 0; i
< exp
->X_add_number
; i
++)
4007 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
4010 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
4011 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
4014 /* We can ignore any carry out, because it will be handled by
4015 extra_digit if it is needed. */
4017 extra_digit
= (valueT
) -1;
4021 if (op
== O_absent
|| op
== O_illegal
)
4023 as_warn (_("zero assumed for missing expression"));
4024 exp
->X_add_number
= 0;
4027 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4029 as_bad (_("floating point number invalid"));
4030 exp
->X_add_number
= 0;
4033 else if (op
== O_register
)
4035 as_warn (_("register value used as expression"));
4039 p
= frag_more ((int) nbytes
);
4041 #ifndef WORKING_DOT_WORD
4042 /* If we have the difference of two symbols in a word, save it on
4043 the broken_words list. See the code in write.c. */
4044 if (op
== O_subtract
&& nbytes
== 2)
4046 struct broken_word
*x
;
4048 x
= (struct broken_word
*) xmalloc (sizeof (struct broken_word
));
4049 x
->next_broken_word
= broken_words
;
4052 x
->subseg
= now_subseg
;
4054 x
->word_goes_here
= p
;
4056 x
->add
= exp
->X_add_symbol
;
4057 x
->sub
= exp
->X_op_symbol
;
4058 x
->addnum
= exp
->X_add_number
;
4066 /* If we have an integer, but the number of bytes is too large to
4067 pass to md_number_to_chars, handle it as a bignum. */
4068 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
4070 extra_digit
= exp
->X_unsigned
? 0 : -1;
4071 convert_to_bignum (exp
);
4075 if (op
== O_constant
)
4077 register valueT get
;
4078 register valueT use
;
4079 register valueT mask
;
4081 register valueT unmask
;
4083 /* JF << of >= number of bits in the object is undefined. In
4084 particular SPARC (Sun 4) has problems. */
4085 if (nbytes
>= sizeof (valueT
))
4088 if (nbytes
> sizeof (valueT
))
4091 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
4095 /* Don't store these bits. */
4096 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
4097 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
4100 unmask
= ~mask
; /* Do store these bits. */
4103 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
4104 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
4107 get
= exp
->X_add_number
;
4109 if ((get
& mask
) != 0
4110 && ((get
& mask
) != mask
4111 || (get
& hibit
) == 0))
4112 { /* Leading bits contain both 0s & 1s. */
4113 #if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG
4114 as_warn (_("value 0x%llx truncated to 0x%llx"),
4115 (unsigned long long) get
, (unsigned long long) use
);
4117 as_warn (_("value 0x%lx truncated to 0x%lx"),
4118 (unsigned long) get
, (unsigned long) use
);
4121 /* Put bytes in right order. */
4122 md_number_to_chars (p
, use
, (int) nbytes
);
4124 else if (op
== O_big
)
4127 LITTLENUM_TYPE
*nums
;
4129 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
4131 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
4134 as_warn (_("bignum truncated to %d bytes"), nbytes
);
4138 if (target_big_endian
)
4140 while (nbytes
> size
)
4142 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4143 nbytes
-= CHARS_PER_LITTLENUM
;
4144 p
+= CHARS_PER_LITTLENUM
;
4147 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
4148 while (size
>= CHARS_PER_LITTLENUM
)
4151 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4152 size
-= CHARS_PER_LITTLENUM
;
4153 p
+= CHARS_PER_LITTLENUM
;
4158 nums
= generic_bignum
;
4159 while (size
>= CHARS_PER_LITTLENUM
)
4161 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4163 size
-= CHARS_PER_LITTLENUM
;
4164 p
+= CHARS_PER_LITTLENUM
;
4165 nbytes
-= CHARS_PER_LITTLENUM
;
4168 while (nbytes
>= CHARS_PER_LITTLENUM
)
4170 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4171 nbytes
-= CHARS_PER_LITTLENUM
;
4172 p
+= CHARS_PER_LITTLENUM
;
4178 memset (p
, 0, nbytes
);
4180 /* Now we need to generate a fixS to record the symbol value. */
4182 #ifdef TC_CONS_FIX_NEW
4183 TC_CONS_FIX_NEW (frag_now
, p
- frag_now
->fr_literal
, nbytes
, exp
);
4186 bfd_reloc_code_real_type r
;
4203 as_bad (_("unsupported BFD relocation size %u"), nbytes
);
4207 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, (int) nbytes
, exp
,
4214 #ifdef BITFIELD_CONS_EXPRESSIONS
4216 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
4217 w:x,y:z, where w and y are bitwidths and x and y are values. They
4218 then pack them all together. We do a little better in that we allow
4219 them in words, longs, etc. and we'll pack them in target byte order
4222 The rules are: pack least significant bit first, if a field doesn't
4223 entirely fit, put it in the next unit. Overflowing the bitfield is
4224 explicitly *not* even a warning. The bitwidth should be considered
4227 To use this function the tc-XXX.h file should define
4228 BITFIELD_CONS_EXPRESSIONS. */
4231 parse_bitfield_cons (exp
, nbytes
)
4233 unsigned int nbytes
;
4235 unsigned int bits_available
= BITS_PER_CHAR
* nbytes
;
4236 char *hold
= input_line_pointer
;
4238 (void) expression (exp
);
4240 if (*input_line_pointer
== ':')
4247 unsigned long width
;
4249 if (*input_line_pointer
!= ':')
4251 input_line_pointer
= hold
;
4253 } /* Next piece is not a bitfield. */
4255 /* In the general case, we can't allow
4256 full expressions with symbol
4257 differences and such. The relocation
4258 entries for symbols not defined in this
4259 assembly would require arbitrary field
4260 widths, positions, and masks which most
4261 of our current object formats don't
4264 In the specific case where a symbol
4265 *is* defined in this assembly, we
4266 *could* build fixups and track it, but
4267 this could lead to confusion for the
4268 backends. I'm lazy. I'll take any
4269 SEG_ABSOLUTE. I think that means that
4270 you can use a previous .set or
4271 .equ type symbol. xoxorich. */
4273 if (exp
->X_op
== O_absent
)
4275 as_warn (_("using a bit field width of zero"));
4276 exp
->X_add_number
= 0;
4277 exp
->X_op
= O_constant
;
4278 } /* Implied zero width bitfield. */
4280 if (exp
->X_op
!= O_constant
)
4282 *input_line_pointer
= '\0';
4283 as_bad (_("field width \"%s\" too complex for a bitfield"), hold
);
4284 *input_line_pointer
= ':';
4285 demand_empty_rest_of_line ();
4287 } /* Too complex. */
4289 if ((width
= exp
->X_add_number
) > (BITS_PER_CHAR
* nbytes
))
4291 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4292 width
, nbytes
, (BITS_PER_CHAR
* nbytes
));
4293 width
= BITS_PER_CHAR
* nbytes
;
4296 if (width
> bits_available
)
4298 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4299 input_line_pointer
= hold
;
4300 exp
->X_add_number
= value
;
4305 hold
= ++input_line_pointer
;
4307 (void) expression (exp
);
4308 if (exp
->X_op
!= O_constant
)
4310 char cache
= *input_line_pointer
;
4312 *input_line_pointer
= '\0';
4313 as_bad (_("field value \"%s\" too complex for a bitfield"), hold
);
4314 *input_line_pointer
= cache
;
4315 demand_empty_rest_of_line ();
4317 } /* Too complex. */
4319 value
|= ((~(-1 << width
) & exp
->X_add_number
)
4320 << ((BITS_PER_CHAR
* nbytes
) - bits_available
));
4322 if ((bits_available
-= width
) == 0
4323 || is_it_end_of_statement ()
4324 || *input_line_pointer
!= ',')
4327 } /* All the bitfields we're gonna get. */
4329 hold
= ++input_line_pointer
;
4330 (void) expression (exp
);
4333 exp
->X_add_number
= value
;
4334 exp
->X_op
= O_constant
;
4335 exp
->X_unsigned
= 1;
4339 #endif /* BITFIELD_CONS_EXPRESSIONS */
4341 /* Handle an MRI style string expression. */
4345 parse_mri_cons (exp
, nbytes
)
4347 unsigned int nbytes
;
4349 if (*input_line_pointer
!= '\''
4350 && (input_line_pointer
[1] != '\''
4351 || (*input_line_pointer
!= 'A'
4352 && *input_line_pointer
!= 'E')))
4353 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
4357 unsigned int result
= 0;
4359 /* An MRI style string. Cut into as many bytes as will fit into
4360 a nbyte chunk, left justify if necessary, and separate with
4361 commas so we can try again later. */
4362 if (*input_line_pointer
== 'A')
4363 ++input_line_pointer
;
4364 else if (*input_line_pointer
== 'E')
4366 as_bad (_("EBCDIC constants are not supported"));
4367 ++input_line_pointer
;
4370 input_line_pointer
++;
4371 for (scan
= 0; scan
< nbytes
; scan
++)
4373 if (*input_line_pointer
== '\'')
4375 if (input_line_pointer
[1] == '\'')
4377 input_line_pointer
++;
4382 result
= (result
<< 8) | (*input_line_pointer
++);
4386 while (scan
< nbytes
)
4392 /* Create correct expression. */
4393 exp
->X_op
= O_constant
;
4394 exp
->X_add_number
= result
;
4396 /* Fake it so that we can read the next char too. */
4397 if (input_line_pointer
[0] != '\'' ||
4398 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
4400 input_line_pointer
-= 2;
4401 input_line_pointer
[0] = ',';
4402 input_line_pointer
[1] = '\'';
4405 input_line_pointer
++;
4408 #endif /* TC_M68K */
4410 #ifdef REPEAT_CONS_EXPRESSIONS
4412 /* Parse a repeat expression for cons. This is used by the MIPS
4413 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4414 object file COUNT times.
4416 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4419 parse_repeat_cons (exp
, nbytes
)
4421 unsigned int nbytes
;
4428 if (*input_line_pointer
!= ':')
4430 /* No repeat count. */
4434 ++input_line_pointer
;
4435 expression (&count
);
4436 if (count
.X_op
!= O_constant
4437 || count
.X_add_number
<= 0)
4439 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4443 /* The cons function is going to output this expression once. So we
4444 output it count - 1 times. */
4445 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
4446 emit_expr (exp
, nbytes
);
4449 #endif /* REPEAT_CONS_EXPRESSIONS */
4451 /* Parse a floating point number represented as a hex constant. This
4452 permits users to specify the exact bits they want in the floating
4456 hex_float (int float_type
, char *bytes
)
4488 as_bad (_("unknown floating type type '%c'"), float_type
);
4492 /* It would be nice if we could go through expression to parse the
4493 hex constant, but if we get a bignum it's a pain to sort it into
4494 the buffer correctly. */
4496 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4500 /* The MRI assembler accepts arbitrary underscores strewn about
4501 through the hex constant, so we ignore them as well. */
4502 if (*input_line_pointer
== '_')
4504 ++input_line_pointer
;
4510 as_warn (_("floating point constant too large"));
4513 d
= hex_value (*input_line_pointer
) << 4;
4514 ++input_line_pointer
;
4515 while (*input_line_pointer
== '_')
4516 ++input_line_pointer
;
4517 if (hex_p (*input_line_pointer
))
4519 d
+= hex_value (*input_line_pointer
);
4520 ++input_line_pointer
;
4522 if (target_big_endian
)
4525 bytes
[length
- i
- 1] = d
;
4531 if (target_big_endian
)
4532 memset (bytes
+ i
, 0, length
- i
);
4534 memset (bytes
, 0, length
- i
);
4542 CONStruct some more frag chars of .floats .ffloats etc.
4543 Makes 0 or more new frags.
4544 If need_pass_2 == 1, no frags are emitted.
4545 This understands only floating literals, not expressions. Sorry.
4547 A floating constant is defined by atof_generic(), except it is preceded
4548 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4549 reading, I decided to be incompatible. This always tries to give you
4550 rounded bits to the precision of the pseudo-op. Former AS did premature
4551 truncation, restored noisy bits instead of trailing 0s AND gave you
4552 a choice of 2 flavours of noise according to which of 2 floating-point
4553 scanners you directed AS to use.
4555 In: input_line_pointer->whitespace before, or '0' of flonum. */
4558 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4559 register int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4562 int length
; /* Number of chars in an object. */
4563 register char *err
; /* Error from scanning floating literal. */
4564 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4566 if (is_it_end_of_statement ())
4568 demand_empty_rest_of_line ();
4572 #ifdef md_flush_pending_output
4573 md_flush_pending_output ();
4578 /* input_line_pointer->1st char of a flonum (we hope!). */
4581 /* Skip any 0{letter} that may be present. Don't even check if the
4582 letter is legal. Someone may invent a "z" format and this routine
4583 has no use for such information. Lusers beware: you get
4584 diagnostics if your input is ill-conditioned. */
4585 if (input_line_pointer
[0] == '0'
4586 && ISALPHA (input_line_pointer
[1]))
4587 input_line_pointer
+= 2;
4589 /* Accept :xxxx, where the x's are hex digits, for a floating
4590 point with the exact digits specified. */
4591 if (input_line_pointer
[0] == ':')
4593 ++input_line_pointer
;
4594 length
= hex_float (float_type
, temp
);
4597 ignore_rest_of_line ();
4603 err
= md_atof (float_type
, temp
, &length
);
4604 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
4608 as_bad (_("bad floating literal: %s"), err
);
4609 ignore_rest_of_line ();
4620 #ifdef REPEAT_CONS_EXPRESSIONS
4621 if (*input_line_pointer
== ':')
4623 expressionS count_exp
;
4625 ++input_line_pointer
;
4626 expression (&count_exp
);
4628 if (count_exp
.X_op
!= O_constant
4629 || count_exp
.X_add_number
<= 0)
4630 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4632 count
= count_exp
.X_add_number
;
4636 while (--count
>= 0)
4638 p
= frag_more (length
);
4639 memcpy (p
, temp
, (unsigned int) length
);
4644 while (*input_line_pointer
++ == ',');
4646 /* Put terminator back into stream. */
4647 --input_line_pointer
;
4648 demand_empty_rest_of_line ();
4651 /* Return the size of a LEB128 value. */
4654 sizeof_sleb128 (offsetT value
)
4656 register int size
= 0;
4657 register unsigned byte
;
4661 byte
= (value
& 0x7f);
4662 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4663 Fortunately, we can structure things so that the extra work reduces
4664 to a noop on systems that do things "properly". */
4665 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4668 while (!(((value
== 0) && ((byte
& 0x40) == 0))
4669 || ((value
== -1) && ((byte
& 0x40) != 0))));
4675 sizeof_uleb128 (valueT value
)
4677 register int size
= 0;
4678 register unsigned byte
;
4682 byte
= (value
& 0x7f);
4692 sizeof_leb128 (valueT value
, int sign
)
4695 return sizeof_sleb128 ((offsetT
) value
);
4697 return sizeof_uleb128 (value
);
4700 /* Output a LEB128 value. */
4703 output_sleb128 (char *p
, offsetT value
)
4705 register char *orig
= p
;
4710 unsigned byte
= (value
& 0x7f);
4712 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4713 Fortunately, we can structure things so that the extra work reduces
4714 to a noop on systems that do things "properly". */
4715 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4717 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
4718 || ((value
== -1) && ((byte
& 0x40) != 0))));
4730 output_uleb128 (char *p
, valueT value
)
4736 unsigned byte
= (value
& 0x7f);
4739 /* More bytes to follow. */
4750 output_leb128 (char *p
, valueT value
, int sign
)
4753 return output_sleb128 (p
, (offsetT
) value
);
4755 return output_uleb128 (p
, value
);
4758 /* Do the same for bignums. We combine sizeof with output here in that
4759 we don't output for NULL values of P. It isn't really as critical as
4760 for "normal" values that this be streamlined. */
4763 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4770 /* Strip leading sign extensions off the bignum. */
4772 && bignum
[size
- 1] == LITTLENUM_MASK
4773 && bignum
[size
- 2] > LITTLENUM_MASK
/ 2)
4778 /* OR in the next part of the littlenum. */
4779 val
|= (*bignum
<< loaded
);
4780 loaded
+= LITTLENUM_NUMBER_OF_BITS
;
4784 /* Add bytes until there are less than 7 bits left in VAL
4785 or until every non-sign bit has been written. */
4792 || val
!= ((byte
& 0x40) == 0 ? 0 : ((valueT
) 1 << loaded
) - 1))
4799 while ((byte
& 0x80) != 0 && loaded
>= 7);
4803 /* Mop up any left-over bits (of which there will be less than 7). */
4804 if ((byte
& 0x80) != 0)
4806 /* Sign-extend VAL. */
4807 if (val
& (1 << (loaded
- 1)))
4808 val
|= ~0 << loaded
;
4818 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4825 /* Strip leading zeros off the bignum. */
4826 /* XXX: Is this needed? */
4827 while (size
> 0 && bignum
[size
- 1] == 0)
4832 if (loaded
< 7 && size
> 0)
4834 val
|= (*bignum
<< loaded
);
4835 loaded
+= 8 * CHARS_PER_LITTLENUM
;
4844 if (size
> 0 || val
)
4851 while (byte
& 0x80);
4857 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
, int sign
)
4860 return output_big_sleb128 (p
, bignum
, size
);
4862 return output_big_uleb128 (p
, bignum
, size
);
4865 /* Generate the appropriate fragments for a given expression to emit a
4869 emit_leb128_expr (expressionS
*exp
, int sign
)
4871 operatorT op
= exp
->X_op
;
4872 unsigned int nbytes
;
4874 if (op
== O_absent
|| op
== O_illegal
)
4876 as_warn (_("zero assumed for missing expression"));
4877 exp
->X_add_number
= 0;
4880 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4882 as_bad (_("floating point number invalid"));
4883 exp
->X_add_number
= 0;
4886 else if (op
== O_register
)
4888 as_warn (_("register value used as expression"));
4891 else if (op
== O_constant
4893 && (exp
->X_add_number
< 0) != !exp
->X_unsigned
)
4895 /* We're outputting a signed leb128 and the sign of X_add_number
4896 doesn't reflect the sign of the original value. Convert EXP
4897 to a correctly-extended bignum instead. */
4898 convert_to_bignum (exp
);
4902 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
4903 a signal that this is leb128 data. It shouldn't optimize this away. */
4904 nbytes
= (unsigned int) -1;
4905 if (check_eh_frame (exp
, &nbytes
))
4908 /* Let the backend know that subsequent data may be byte aligned. */
4909 #ifdef md_cons_align
4913 if (op
== O_constant
)
4915 /* If we've got a constant, emit the thing directly right now. */
4917 valueT value
= exp
->X_add_number
;
4921 size
= sizeof_leb128 (value
, sign
);
4922 p
= frag_more (size
);
4923 output_leb128 (p
, value
, sign
);
4925 else if (op
== O_big
)
4927 /* O_big is a different sort of constant. */
4932 size
= output_big_leb128 (NULL
, generic_bignum
, exp
->X_add_number
, sign
);
4933 p
= frag_more (size
);
4934 output_big_leb128 (p
, generic_bignum
, exp
->X_add_number
, sign
);
4938 /* Otherwise, we have to create a variable sized fragment and
4939 resolve things later. */
4941 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
4942 make_expr_symbol (exp
), 0, (char *) NULL
);
4946 /* Parse the .sleb128 and .uleb128 pseudos. */
4953 #ifdef md_flush_pending_output
4954 md_flush_pending_output ();
4960 emit_leb128_expr (&exp
, sign
);
4962 while (*input_line_pointer
++ == ',');
4964 input_line_pointer
--;
4965 demand_empty_rest_of_line ();
4969 stringer_append_char (int c
, int bitsize
)
4971 if (!target_big_endian
)
4972 FRAG_APPEND_1_CHAR (c
);
4977 FRAG_APPEND_1_CHAR (0);
4978 FRAG_APPEND_1_CHAR (0);
4979 FRAG_APPEND_1_CHAR (0);
4980 FRAG_APPEND_1_CHAR (0);
4983 FRAG_APPEND_1_CHAR (0);
4984 FRAG_APPEND_1_CHAR (0);
4987 FRAG_APPEND_1_CHAR (0);
4992 /* Called with invalid bitsize argument. */
4996 if (target_big_endian
)
4997 FRAG_APPEND_1_CHAR (c
);
5000 /* Worker to do .ascii etc statements.
5001 Reads 0 or more ',' separated, double-quoted strings.
5002 Caller should have checked need_pass_2 is FALSE because we don't
5004 Checks for end-of-line.
5005 BITS_APPENDZERO says how many bits are in a target char.
5006 The bottom bit is set if a NUL char should be appended to the strings. */
5009 stringer (int bits_appendzero
)
5011 const int bitsize
= bits_appendzero
& ~7;
5012 const int append_zero
= bits_appendzero
& 1;
5016 #ifdef md_flush_pending_output
5017 md_flush_pending_output ();
5020 /* The following awkward logic is to parse ZERO or more strings,
5021 comma separated. Recall a string expression includes spaces
5022 before the opening '\"' and spaces after the closing '\"'.
5023 We fake a leading ',' if there is (supposed to be)
5024 a 1st, expression. We keep demanding expressions for each ','. */
5025 if (is_it_end_of_statement ())
5027 c
= 0; /* Skip loop. */
5028 ++input_line_pointer
; /* Compensate for end of loop. */
5032 c
= ','; /* Do loop. */
5034 /* If we have been switched into the abs_section then we
5035 will not have an obstack onto which we can hang strings. */
5036 if (now_seg
== absolute_section
)
5038 as_bad (_("strings must be placed into a section"));
5040 ignore_rest_of_line ();
5043 while (c
== ',' || c
== '<' || c
== '"')
5046 switch (*input_line_pointer
)
5049 ++input_line_pointer
; /*->1st char of string. */
5050 start
= input_line_pointer
;
5052 while (is_a_char (c
= next_char_of_string ()))
5053 stringer_append_char (c
, bitsize
);
5056 stringer_append_char (0, bitsize
);
5058 know (input_line_pointer
[-1] == '\"');
5062 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
5063 will emit .string with a filename in the .debug section
5064 after a sequence of constants. See the comment in
5065 emit_expr for the sequence. emit_expr will set
5066 dwarf_file_string to non-zero if this string might be a
5067 source file name. */
5068 if (strcmp (segment_name (now_seg
), ".debug") != 0)
5069 dwarf_file_string
= 0;
5070 else if (dwarf_file_string
)
5072 c
= input_line_pointer
[-1];
5073 input_line_pointer
[-1] = '\0';
5074 listing_source_file (start
);
5075 input_line_pointer
[-1] = c
;
5082 input_line_pointer
++;
5083 c
= get_single_number ();
5084 stringer_append_char (c
, bitsize
);
5085 if (*input_line_pointer
!= '>')
5086 as_bad (_("expected <nn>"));
5088 input_line_pointer
++;
5091 input_line_pointer
++;
5095 c
= *input_line_pointer
;
5098 demand_empty_rest_of_line ();
5101 /* FIXME-SOMEDAY: I had trouble here on characters with the
5102 high bits set. We'll probably also have trouble with
5103 multibyte chars, wide chars, etc. Also be careful about
5104 returning values bigger than 1 byte. xoxorich. */
5107 next_char_of_string (void)
5109 register unsigned int c
;
5111 c
= *input_line_pointer
++ & CHAR_MASK
;
5119 as_warn (_("unterminated string; newline inserted"));
5120 bump_line_counters ();
5123 #ifndef NO_STRING_ESCAPES
5125 switch (c
= *input_line_pointer
++)
5153 break; /* As itself. */
5169 for (i
= 0, number
= 0;
5170 ISDIGIT (c
) && i
< 3;
5171 c
= *input_line_pointer
++, i
++)
5173 number
= number
* 8 + c
- '0';
5178 --input_line_pointer
;
5187 c
= *input_line_pointer
++;
5188 while (ISXDIGIT (c
))
5191 number
= number
* 16 + c
- '0';
5192 else if (ISUPPER (c
))
5193 number
= number
* 16 + c
- 'A' + 10;
5195 number
= number
* 16 + c
- 'a' + 10;
5196 c
= *input_line_pointer
++;
5199 --input_line_pointer
;
5204 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
5205 as_warn (_("unterminated string; newline inserted"));
5207 bump_line_counters ();
5212 #ifdef ONLY_STANDARD_ESCAPES
5213 as_bad (_("bad escaped character in string"));
5215 #endif /* ONLY_STANDARD_ESCAPES */
5220 #endif /* ! defined (NO_STRING_ESCAPES) */
5229 get_segmented_expression (register expressionS
*expP
)
5231 register segT retval
;
5233 retval
= expression (expP
);
5234 if (expP
->X_op
== O_illegal
5235 || expP
->X_op
== O_absent
5236 || expP
->X_op
== O_big
)
5238 as_bad (_("expected address expression"));
5239 expP
->X_op
= O_constant
;
5240 expP
->X_add_number
= 0;
5241 retval
= absolute_section
;
5247 get_known_segmented_expression (register expressionS
*expP
)
5249 register segT retval
;
5251 if ((retval
= get_segmented_expression (expP
)) == undefined_section
)
5253 /* There is no easy way to extract the undefined symbol from the
5255 if (expP
->X_add_symbol
!= NULL
5256 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
5257 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5258 S_GET_NAME (expP
->X_add_symbol
));
5260 as_warn (_("some symbol undefined; zero assumed"));
5261 retval
= absolute_section
;
5262 expP
->X_op
= O_constant
;
5263 expP
->X_add_number
= 0;
5265 know (retval
== absolute_section
|| SEG_NORMAL (retval
));
5269 char /* Return terminator. */
5270 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
5272 /* FIXME: val_pointer should probably be offsetT *. */
5273 *val_pointer
= (long) get_absolute_expression ();
5274 return (*input_line_pointer
++);
5277 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
5278 Give a warning if that happens. */
5281 demand_copy_C_string (int *len_pointer
)
5285 if ((s
= demand_copy_string (len_pointer
)) != 0)
5289 for (len
= *len_pointer
; len
> 0; len
--)
5296 as_bad (_("this string may not contain \'\\0\'"));
5304 /* Demand string, but return a safe (=private) copy of the string.
5305 Return NULL if we can't read a string here. */
5308 demand_copy_string (int *lenP
)
5310 register unsigned int c
;
5316 if (*input_line_pointer
== '\"')
5318 input_line_pointer
++; /* Skip opening quote. */
5320 while (is_a_char (c
= next_char_of_string ()))
5322 obstack_1grow (¬es
, c
);
5325 /* JF this next line is so demand_copy_C_string will return a
5326 null terminated string. */
5327 obstack_1grow (¬es
, '\0');
5328 retval
= obstack_finish (¬es
);
5332 as_bad (_("missing string"));
5334 ignore_rest_of_line ();
5340 /* In: Input_line_pointer->next character.
5342 Do: Skip input_line_pointer over all whitespace.
5344 Out: 1 if input_line_pointer->end-of-line. */
5347 is_it_end_of_statement (void)
5350 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
5354 equals (char *sym_name
, int reassign
)
5359 input_line_pointer
++;
5360 if (*input_line_pointer
== '=')
5361 input_line_pointer
++;
5362 if (reassign
< 0 && *input_line_pointer
== '=')
5363 input_line_pointer
++;
5365 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
5366 input_line_pointer
++;
5369 stop
= mri_comment_field (&stopc
);
5371 assign_symbol (sym_name
, reassign
>= 0 ? !reassign
: reassign
);
5375 demand_empty_rest_of_line ();
5376 mri_comment_end (stop
, stopc
);
5380 /* .incbin -- include a file verbatim at the current location. */
5383 s_incbin (int x ATTRIBUTE_UNUSED
)
5394 #ifdef md_flush_pending_output
5395 md_flush_pending_output ();
5399 filename
= demand_copy_string (& len
);
5400 if (filename
== NULL
)
5405 /* Look for optional skip and count. */
5406 if (* input_line_pointer
== ',')
5408 ++ input_line_pointer
;
5409 skip
= get_absolute_expression ();
5413 if (* input_line_pointer
== ',')
5415 ++ input_line_pointer
;
5417 count
= get_absolute_expression ();
5419 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
5425 demand_empty_rest_of_line ();
5427 /* Try opening absolute path first, then try include dirs. */
5428 binfile
= fopen (filename
, FOPEN_RB
);
5429 if (binfile
== NULL
)
5433 path
= xmalloc ((unsigned long) len
+ include_dir_maxlen
+ 5);
5435 for (i
= 0; i
< include_dir_count
; i
++)
5437 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
5439 binfile
= fopen (path
, FOPEN_RB
);
5440 if (binfile
!= NULL
)
5444 if (binfile
== NULL
)
5445 as_bad (_("file not found: %s"), filename
);
5448 path
= xstrdup (filename
);
5454 register_dependency (path
);
5456 /* Compute the length of the file. */
5457 if (fseek (binfile
, 0, SEEK_END
) != 0)
5459 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
5462 file_len
= ftell (binfile
);
5464 /* If a count was not specified use the remainder of the file. */
5466 count
= file_len
- skip
;
5468 if (skip
< 0 || count
< 0 || file_len
< 0 || skip
+ count
> file_len
)
5470 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5471 skip
, count
, file_len
);
5475 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
5477 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
5481 /* Allocate frag space and store file contents in it. */
5482 binfrag
= frag_more (count
);
5484 bytes
= fread (binfrag
, 1, count
, binfile
);
5486 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5487 path
, bytes
, count
);
5490 if (binfile
!= NULL
)
5496 /* .include -- include a file at this point. */
5499 s_include (int arg ATTRIBUTE_UNUSED
)
5508 filename
= demand_copy_string (&i
);
5509 if (filename
== NULL
)
5511 /* demand_copy_string has already printed an error and
5512 called ignore_rest_of_line. */
5520 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
5521 && *input_line_pointer
!= ' '
5522 && *input_line_pointer
!= '\t')
5524 obstack_1grow (¬es
, *input_line_pointer
);
5525 ++input_line_pointer
;
5529 obstack_1grow (¬es
, '\0');
5530 filename
= obstack_finish (¬es
);
5531 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5532 ++input_line_pointer
;
5535 demand_empty_rest_of_line ();
5536 path
= xmalloc ((unsigned long) i
+ include_dir_maxlen
+ 5 /* slop */ );
5538 for (i
= 0; i
< include_dir_count
; i
++)
5540 strcpy (path
, include_dirs
[i
]);
5542 strcat (path
, filename
);
5543 if (0 != (try = fopen (path
, FOPEN_RT
)))
5553 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5554 register_dependency (path
);
5555 input_scrub_insert_file (path
);
5559 add_include_dir (char *path
)
5563 if (include_dir_count
== 0)
5565 include_dirs
= (char **) xmalloc (2 * sizeof (*include_dirs
));
5566 include_dirs
[0] = "."; /* Current dir. */
5567 include_dir_count
= 2;
5571 include_dir_count
++;
5573 (char **) realloc (include_dirs
,
5574 include_dir_count
* sizeof (*include_dirs
));
5577 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
5580 if (i
> include_dir_maxlen
)
5581 include_dir_maxlen
= i
;
5584 /* Output debugging information to denote the source file. */
5587 generate_file_debug (void)
5589 if (debug_type
== DEBUG_STABS
)
5590 stabs_generate_asm_file ();
5593 /* Output line number debugging information for the current source line. */
5596 generate_lineno_debug (void)
5600 case DEBUG_UNSPECIFIED
:
5605 stabs_generate_asm_lineno ();
5608 ecoff_generate_asm_lineno ();
5611 /* ??? We could here indicate to dwarf2dbg.c that something
5612 has changed. However, since there is additional backend
5613 support that is required (calling dwarf2_emit_insn), we
5614 let dwarf2dbg.c call as_where on its own. */
5619 /* Output debugging information to mark a function entry point or end point.
5620 END_P is zero for .func, and non-zero for .endfunc. */
5625 do_s_func (end_p
, NULL
);
5628 /* Subroutine of s_func so targets can choose a different default prefix.
5629 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5632 do_s_func (int end_p
, const char *default_prefix
)
5634 /* Record the current function so that we can issue an error message for
5635 misplaced .func,.endfunc, and also so that .endfunc needs no
5637 static char *current_name
;
5638 static char *current_label
;
5642 if (current_name
== NULL
)
5644 as_bad (_("missing .func"));
5645 ignore_rest_of_line ();
5649 if (debug_type
== DEBUG_STABS
)
5650 stabs_generate_asm_endfunc (current_name
, current_label
);
5652 current_name
= current_label
= NULL
;
5657 char delim1
, delim2
;
5659 if (current_name
!= NULL
)
5661 as_bad (_(".endfunc missing for previous .func"));
5662 ignore_rest_of_line ();
5666 name
= input_line_pointer
;
5667 delim1
= get_symbol_end ();
5668 name
= xstrdup (name
);
5669 *input_line_pointer
= delim1
;
5671 if (*input_line_pointer
!= ',')
5674 asprintf (&label
, "%s%s", default_prefix
, name
);
5677 char leading_char
= bfd_get_symbol_leading_char (stdoutput
);
5678 /* Missing entry point, use function's name with the leading
5681 asprintf (&label
, "%c%s", leading_char
, name
);
5688 ++input_line_pointer
;
5690 label
= input_line_pointer
;
5691 delim2
= get_symbol_end ();
5692 label
= xstrdup (label
);
5693 *input_line_pointer
= delim2
;
5696 if (debug_type
== DEBUG_STABS
)
5697 stabs_generate_asm_func (name
, label
);
5699 current_name
= name
;
5700 current_label
= label
;
5703 demand_empty_rest_of_line ();
5707 s_ignore (int arg ATTRIBUTE_UNUSED
)
5709 ignore_rest_of_line ();
5713 read_print_statistics (FILE *file
)
5715 hash_print_statistics (file
, "pseudo-op table", po_hash
);
5718 /* Inserts the given line into the input stream.
5720 This call avoids macro/conditionals nesting checking, since the contents of
5721 the line are assumed to replace the contents of a line already scanned.
5723 An appropriate use of this function would be substitution of input lines when
5724 called by md_start_line_hook(). The given line is assumed to already be
5725 properly scrubbed. */
5728 input_scrub_insert_line (const char *line
)
5732 sb_add_string (&newline
, line
);
5733 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
5735 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5738 /* Insert a file into the input stream; the path must resolve to an actual
5739 file; no include path searching or dependency registering is performed. */
5742 input_scrub_insert_file (char *path
)
5744 input_scrub_include_file (path
, input_line_pointer
);
5745 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5748 /* Find the end of a line, considering quotation and escaping of quotes. */
5750 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5751 # define TC_SINGLE_QUOTE_STRINGS 1
5755 _find_end_of_line (char *s
, int mri_string
, int insn ATTRIBUTE_UNUSED
)
5757 char inquote
= '\0';
5760 while (!is_end_of_line
[(unsigned char) *s
]
5761 || (inquote
&& !ISCNTRL (*s
))
5762 || (inquote
== '\'' && flag_mri
)
5763 #ifdef TC_EOL_IN_INSN
5764 || (insn
&& TC_EOL_IN_INSN (s
))
5768 if (mri_string
&& *s
== '\'')
5772 else if (*s
== '\\')
5776 #ifdef TC_SINGLE_QUOTE_STRINGS
5777 || (TC_SINGLE_QUOTE_STRINGS
&& *s
== '\'')
5784 as_warn (_("missing closing `%c'"), inquote
);
5786 as_warn (_("stray `\\'"));
5791 find_end_of_line (char *s
, int mri_string
)
5793 return _find_end_of_line (s
, mri_string
, 0);