1 /* read.c - read a source file -
2 Copyright (C) 1986-2016 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 GAS is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to the Free
18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
21 /* If your chars aren't 8 bits, you will change this a bit (eg. to 0xFF).
22 But then, GNU isn't spozed to run on your machine anyway.
23 (RMS is so shortsighted sometimes.) */
24 #define MASK_CHAR ((int)(unsigned char) -1)
26 /* This is the largest known floating point format (for now). It will
27 grow when we do 4361 style flonums. */
28 #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
30 /* Routines that read assembler source text to build spaghetti in memory.
31 Another group of these functions is in the expr.c module. */
34 #include "safe-ctype.h"
40 #include "dw2gencfi.h"
43 #ifndef TC_START_LABEL
44 #define TC_START_LABEL(STR, NUL_CHAR, NEXT_CHAR) (NEXT_CHAR == ':')
47 /* Set by the object-format or the target. */
48 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
49 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
54 else if ((SIZE) >= 4) \
56 else if ((SIZE) >= 2) \
64 char *input_line_pointer
; /*->next char of source file to parse. */
66 #if BITS_PER_CHAR != 8
67 /* The following table is indexed by[(char)] and will break if
68 a char does not have exactly 256 states (hopefully 0:255!)! */
77 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
82 /* The Delta 68k assembler permits % inside label names. */
87 /* The PowerPC Windows NT assemblers permits ? inside label names. */
92 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
93 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
102 /* The Delta 68k assembler permits ~ at start of label names. */
106 /* Used by is_... macros. our ctype[]. */
107 char lex_type
[256] = {
108 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
110 0, 0, 0, LEX_HASH
, LEX_DOLLAR
, LEX_PCT
, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
111 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM
, /* 0123456789:;<=>? */
112 LEX_AT
, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
113 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, 0, 3, /* PQRSTUVWXYZ[\]^_ */
114 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
115 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, LEX_TILDE
, 0, /* pqrstuvwxyz{|}~. */
116 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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
127 Out: 1 if this character ends a line.
128 2 if this character is a line separator. */
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. */
169 const char **include_dirs
;
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 /* If the target defines the md_frag_max_var hook then we know
212 enough to implement the .bundle_align_mode features. */
213 #ifdef md_frag_max_var
214 # define HANDLE_BUNDLE
218 /* .bundle_align_mode sets this. Normally it's zero. When nonzero,
219 it's the exponent of the bundle size, and aligned instruction bundle
220 mode is in effect. */
221 static unsigned int bundle_align_p2
;
223 /* These are set by .bundle_lock and .bundle_unlock. .bundle_lock sets
224 bundle_lock_frag to frag_now and then starts a new frag with
225 frag_align_code. At the same time, bundle_lock_frain gets frchain_now,
226 so that .bundle_unlock can verify that we didn't change segments.
227 .bundle_unlock resets both to NULL. If we detect a bundling violation,
228 then we reset bundle_lock_frchain to NULL as an indicator that we've
229 already diagnosed the error with as_bad and don't need a cascade of
230 redundant errors, but bundle_lock_frag remains set to indicate that
231 we are expecting to see .bundle_unlock. */
232 static fragS
*bundle_lock_frag
;
233 static frchainS
*bundle_lock_frchain
;
235 /* This is incremented by .bundle_lock and decremented by .bundle_unlock,
237 static unsigned int bundle_lock_depth
;
240 static void do_s_func (int end_p
, const char *default_prefix
);
241 static void s_align (int, int);
242 static void s_altmacro (int);
243 static void s_bad_end (int);
244 static void s_reloc (int);
245 static int hex_float (int, char *);
246 static segT
get_known_segmented_expression (expressionS
* expP
);
247 static void pobegin (void);
248 static size_t get_non_macro_line_sb (sb
*);
249 static void generate_file_debug (void);
250 static char *_find_end_of_line (char *, int, int, int);
258 obj_read_begin_hook ();
260 /* Something close -- but not too close -- to a multiple of 1024.
261 The debugging malloc I'm using has 24 bytes of overhead. */
262 obstack_begin (¬es
, chunksize
);
263 obstack_begin (&cond_obstack
, chunksize
);
265 #ifndef tc_line_separator_chars
266 #define tc_line_separator_chars line_separator_chars
268 /* Use machine dependent syntax. */
269 for (p
= tc_line_separator_chars
; *p
; p
++)
270 is_end_of_line
[(unsigned char) *p
] = 2;
271 /* Use more. FIXME-SOMEDAY. */
277 #ifndef TC_ADDRESS_BYTES
278 #define TC_ADDRESS_BYTES address_bytes
283 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
284 contain an address. */
285 int n
= (stdoutput
->arch_info
->bits_per_address
- 1) / 8;
293 /* Set up pseudo-op tables. */
295 static struct hash_control
*po_hash
;
297 static const pseudo_typeS potable
[] = {
298 {"abort", s_abort
, 0},
299 {"align", s_align_ptwo
, 0},
300 {"altmacro", s_altmacro
, 1},
301 {"ascii", stringer
, 8+0},
302 {"asciz", stringer
, 8+1},
303 {"balign", s_align_bytes
, 0},
304 {"balignw", s_align_bytes
, -2},
305 {"balignl", s_align_bytes
, -4},
308 {"bundle_align_mode", s_bundle_align_mode
, 0},
309 {"bundle_lock", s_bundle_lock
, 0},
310 {"bundle_unlock", s_bundle_unlock
, 0},
314 {"common", s_mri_common
, 0},
315 {"common.s", s_mri_common
, 1},
318 #ifdef TC_ADDRESS_BYTES
322 {"dc.d", float_cons
, 'd'},
324 {"dc.s", float_cons
, 'f'},
326 {"dc.x", float_cons
, 'x'},
328 {"dcb.b", s_space
, 1},
329 {"dcb.d", s_float_space
, 'd'},
330 {"dcb.l", s_space
, 4},
331 {"dcb.s", s_float_space
, 'f'},
332 {"dcb.w", s_space
, 2},
333 {"dcb.x", s_float_space
, 'x'},
335 {"ds.b", s_space
, 1},
336 {"ds.d", s_space
, 8},
337 {"ds.l", s_space
, 4},
338 {"ds.p", s_space
, 12},
339 {"ds.s", s_space
, 4},
340 {"ds.w", s_space
, 2},
341 {"ds.x", s_space
, 12},
342 {"debug", s_ignore
, 0},
347 {"double", float_cons
, 'd'},
349 {"eject", listing_eject
, 0}, /* Formfeed listing. */
351 {"elsec", s_else
, 0},
352 {"elseif", s_elseif
, (int) O_ne
},
354 {"endc", s_endif
, 0},
355 {"endfunc", s_func
, 1},
356 {"endif", s_endif
, 0},
357 {"endm", s_bad_end
, 0},
358 {"endr", s_bad_end
, 1},
364 {"error", s_errwarn
, 1},
365 {"exitm", s_mexit
, 0},
367 {"extern", s_ignore
, 0}, /* We treat all undef as ext. */
368 {"appfile", s_app_file
, 1},
369 {"appline", s_app_line
, 1},
371 {"file", s_app_file
, 0},
373 {"float", float_cons
, 'f'},
374 {"format", s_ignore
, 0},
376 {"global", s_globl
, 0},
377 {"globl", s_globl
, 0},
379 {"if", s_if
, (int) O_ne
},
382 {"ifdef", s_ifdef
, 0},
383 {"ifeq", s_if
, (int) O_eq
},
384 {"ifeqs", s_ifeqs
, 0},
385 {"ifge", s_if
, (int) O_ge
},
386 {"ifgt", s_if
, (int) O_gt
},
387 {"ifle", s_if
, (int) O_le
},
388 {"iflt", s_if
, (int) O_lt
},
391 {"ifndef", s_ifdef
, 1},
392 {"ifne", s_if
, (int) O_ne
},
393 {"ifnes", s_ifeqs
, 1},
394 {"ifnotdef", s_ifdef
, 1},
395 {"incbin", s_incbin
, 0},
396 {"include", s_include
, 0},
402 {"lcomm", s_lcomm
, 0},
403 {"lflags", s_ignore
, 0}, /* Listing flags. */
404 {"linefile", s_app_line
, 0},
405 {"linkonce", s_linkonce
, 0},
406 {"list", listing_list
, 1}, /* Turn listing on. */
407 {"llen", listing_psize
, 1},
410 {"macro", s_macro
, 0},
411 {"mexit", s_mexit
, 0},
413 {".mri", s_mri
, 0}, /* Special case so .mri works in MRI mode. */
414 {"name", s_ignore
, 0},
415 {"noaltmacro", s_altmacro
, 0},
416 {"noformat", s_ignore
, 0},
417 {"nolist", listing_list
, 0}, /* Turn listing off. */
418 {"nopage", listing_nopage
, 0},
420 {"offset", s_struct
, 0},
422 {"p2align", s_align_ptwo
, 0},
423 {"p2alignw", s_align_ptwo
, -2},
424 {"p2alignl", s_align_ptwo
, -4},
425 {"page", listing_eject
, 0},
426 {"plen", listing_psize
, 0},
427 {"print", s_print
, 0},
428 {"psize", listing_psize
, 0}, /* Set paper size. */
429 {"purgem", s_purgem
, 0},
431 {"reloc", s_reloc
, 0},
435 {"sbttl", listing_title
, 1}, /* Subtitle of listing. */
440 {"single", float_cons
, 'f'},
442 {"space", s_space
, 0},
443 {"skip", s_space
, 0},
444 {"sleb128", s_leb128
, 1},
445 {"spc", s_ignore
, 0},
446 {"stabd", s_stab
, 'd'},
447 {"stabn", s_stab
, 'n'},
448 {"stabs", s_stab
, 's'},
449 {"string", stringer
, 8+1},
450 {"string8", stringer
, 8+1},
451 {"string16", stringer
, 16+1},
452 {"string32", stringer
, 32+1},
453 {"string64", stringer
, 64+1},
454 {"struct", s_struct
, 0},
458 /* This is for gcc to use. It's only just been added (2/94), so gcc
459 won't be able to use it for a while -- probably a year or more.
460 But once this has been released, check with gcc maintainers
461 before deleting it or even changing the spelling. */
462 {"this_GCC_requires_the_GNU_assembler", s_ignore
, 0},
463 /* If we're folding case -- done for some targets, not necessarily
464 all -- the above string in an input file will be converted to
465 this one. Match it either way... */
466 {"this_gcc_requires_the_gnu_assembler", s_ignore
, 0},
468 {"title", listing_title
, 0}, /* Listing title. */
469 {"ttl", listing_title
, 0},
471 {"uleb128", s_leb128
, 0},
475 {"xdef", s_globl
, 0},
476 {"xref", s_ignore
, 0},
477 {"xstabs", s_xstab
, 's'},
478 {"warning", s_errwarn
, 0},
479 {"weakref", s_weakref
, 0},
481 {"zero", s_space
, 0},
482 {NULL
, NULL
, 0} /* End sentinel. */
486 get_absolute_expr (expressionS
*exp
)
488 expression_and_evaluate (exp
);
490 if (exp
->X_op
!= O_constant
)
492 if (exp
->X_op
!= O_absent
)
493 as_bad (_("bad or irreducible absolute expression"));
494 exp
->X_add_number
= 0;
496 return exp
->X_add_number
;
500 get_absolute_expression (void)
504 return get_absolute_expr (&exp
);
507 static int pop_override_ok
= 0;
508 static const char *pop_table_name
;
511 pop_insert (const pseudo_typeS
*table
)
514 const pseudo_typeS
*pop
;
515 for (pop
= table
; pop
->poc_name
; pop
++)
517 errtxt
= hash_insert (po_hash
, pop
->poc_name
, (char *) pop
);
518 if (errtxt
&& (!pop_override_ok
|| strcmp (errtxt
, "exists")))
519 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name
,
524 #ifndef md_pop_insert
525 #define md_pop_insert() pop_insert(md_pseudo_table)
528 #ifndef obj_pop_insert
529 #define obj_pop_insert() pop_insert(obj_pseudo_table)
532 #ifndef cfi_pop_insert
533 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
539 po_hash
= hash_new ();
541 /* Do the target-specific pseudo ops. */
542 pop_table_name
= "md";
545 /* Now object specific. Skip any that were in the target table. */
546 pop_table_name
= "obj";
550 /* Now portable ones. Skip any that we've seen already. */
551 pop_table_name
= "standard";
552 pop_insert (potable
);
555 pop_table_name
= "cfi";
560 #define HANDLE_CONDITIONAL_ASSEMBLY(num_read) \
561 if (ignore_input ()) \
563 char *eol = find_end_of_line (input_line_pointer - (num_read), \
565 input_line_pointer = (input_line_pointer <= buffer_limit \
566 && eol >= buffer_limit) \
572 /* This function is used when scrubbing the characters between #APP
575 static char *scrub_string
;
576 static char *scrub_string_end
;
579 scrub_from_string (char *buf
, size_t buflen
)
583 copy
= scrub_string_end
- scrub_string
;
586 memcpy (buf
, scrub_string
, copy
);
587 scrub_string
+= copy
;
591 /* Helper function of read_a_source_file, which tries to expand a macro. */
593 try_macro (char term
, const char *line
)
599 if (check_macro (line
, &out
, &err
, ¯o
))
603 *input_line_pointer
++ = term
;
604 input_scrub_include_sb (&out
,
605 input_line_pointer
, 1);
608 input_scrub_next_buffer (&input_line_pointer
);
610 md_macro_info (macro
);
618 /* Start a new instruction bundle. Returns the rs_align_code frag that
619 will be used to align the new bundle. */
623 fragS
*frag
= frag_now
;
625 frag_align_code (0, 0);
627 while (frag
->fr_type
!= rs_align_code
)
628 frag
= frag
->fr_next
;
630 gas_assert (frag
!= frag_now
);
635 /* Calculate the maximum size after relaxation of the region starting
636 at the given frag and extending through frag_now (which is unfinished). */
638 pending_bundle_size (fragS
*frag
)
640 unsigned int offset
= frag
->fr_fix
;
641 unsigned int size
= 0;
643 gas_assert (frag
!= frag_now
);
644 gas_assert (frag
->fr_type
== rs_align_code
);
646 while (frag
!= frag_now
)
648 /* This should only happen in what will later become an error case. */
652 size
+= frag
->fr_fix
;
653 if (frag
->fr_type
== rs_machine_dependent
)
654 size
+= md_frag_max_var (frag
);
656 frag
= frag
->fr_next
;
659 gas_assert (frag
== frag_now
);
660 size
+= frag_now_fix ();
661 if (frag
->fr_type
== rs_machine_dependent
)
662 size
+= md_frag_max_var (frag
);
664 gas_assert (size
>= offset
);
666 return size
- offset
;
669 /* Finish off the frag created to ensure bundle alignment. */
671 finish_bundle (fragS
*frag
, unsigned int size
)
673 gas_assert (bundle_align_p2
> 0);
674 gas_assert (frag
->fr_type
== rs_align_code
);
678 /* If there is more than a single byte, then we need to set up the
679 alignment frag. Otherwise we leave it at its initial state from
680 calling frag_align_code (0, 0), so that it does nothing. */
681 frag
->fr_offset
= bundle_align_p2
;
682 frag
->fr_subtype
= size
- 1;
685 /* We do this every time rather than just in s_bundle_align_mode
686 so that we catch any affected section without needing hooks all
687 over for all paths that do section changes. It's cheap enough. */
688 if (bundle_align_p2
> OCTETS_PER_BYTE_POWER
)
689 record_alignment (now_seg
, bundle_align_p2
- OCTETS_PER_BYTE_POWER
);
692 /* Assemble one instruction. This takes care of the bundle features
693 around calling md_assemble. */
695 assemble_one (char *line
)
697 fragS
*insn_start_frag
= NULL
;
699 if (bundle_lock_frchain
!= NULL
&& bundle_lock_frchain
!= frchain_now
)
701 as_bad (_("cannot change section or subsection inside .bundle_lock"));
702 /* Clearing this serves as a marker that we have already complained. */
703 bundle_lock_frchain
= NULL
;
706 if (bundle_lock_frchain
== NULL
&& bundle_align_p2
> 0)
707 insn_start_frag
= start_bundle ();
711 if (bundle_lock_frchain
!= NULL
)
713 /* Make sure this hasn't pushed the locked sequence
714 past the bundle size. */
715 unsigned int bundle_size
= pending_bundle_size (bundle_lock_frag
);
716 if (bundle_size
> (1U << bundle_align_p2
))
718 .bundle_lock sequence at %u bytes but .bundle_align_mode limit is %u bytes"),
719 bundle_size
, 1U << bundle_align_p2
);
721 else if (bundle_align_p2
> 0)
723 unsigned int insn_size
= pending_bundle_size (insn_start_frag
);
725 if (insn_size
> (1U << bundle_align_p2
))
727 single instruction is %u bytes long but .bundle_align_mode limit is %u"),
728 (unsigned int) insn_size
, 1U << bundle_align_p2
);
730 finish_bundle (insn_start_frag
, insn_size
);
734 #else /* !HANDLE_BUNDLE */
736 # define assemble_one(line) md_assemble(line)
738 #endif /* HANDLE_BUNDLE */
743 flagword flags
= bfd_get_section_flags (stdoutput
, now_seg
);
745 return (flags
& SEC_ALLOC
) && !(flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
));
748 /* Guts of .align directive:
749 N is the power of two to which to align. A value of zero is accepted but
750 ignored: the default alignment of the section will be at least this.
751 FILL may be NULL, or it may point to the bytes of the fill pattern.
752 LEN is the length of whatever FILL points to, if anything. If LEN is zero
753 but FILL is not NULL then LEN is treated as if it were one.
754 MAX is the maximum number of characters to skip when doing the alignment,
755 or 0 if there is no maximum. */
758 do_align (unsigned int n
, char *fill
, unsigned int len
, unsigned int max
)
760 if (now_seg
== absolute_section
|| in_bss ())
766 if (now_seg
== absolute_section
)
767 as_warn (_("ignoring fill value in absolute section"));
769 as_warn (_("ignoring fill value in section `%s'"),
770 segment_name (now_seg
));
777 #ifdef md_flush_pending_output
778 md_flush_pending_output ();
782 md_do_align (n
, fill
, len
, max
, just_record_alignment
);
785 /* Only make a frag if we HAVE to... */
786 if ((n
> OCTETS_PER_BYTE_POWER
) && !need_pass_2
)
790 if (subseg_text_p (now_seg
))
791 frag_align_code (n
, max
);
793 frag_align (n
, 0, max
);
796 frag_align (n
, *fill
, max
);
798 frag_align_pattern (n
, fill
, len
, max
);
802 just_record_alignment
: ATTRIBUTE_UNUSED_LABEL
805 if (n
> OCTETS_PER_BYTE_POWER
)
806 record_alignment (now_seg
, n
- OCTETS_PER_BYTE_POWER
);
809 /* We read the file, putting things into a web that represents what we
810 have been reading. */
812 read_a_source_file (const char *name
)
816 char *s
; /* String of symbol, '\0' appended. */
824 buffer
= input_scrub_new_file (name
);
827 listing_newline (NULL
);
828 register_dependency (name
);
830 /* Generate debugging information before we've read anything in to denote
831 this file as the "main" source file and not a subordinate one
832 (e.g. N_SO vs N_SOL in stabs). */
833 generate_file_debug ();
835 while ((buffer_limit
= input_scrub_next_buffer (&input_line_pointer
)) != 0)
836 { /* We have another line to parse. */
838 /* In order to avoid listing macro expansion lines with labels
839 multiple times, keep track of which line was last issued. */
840 static char *last_eol
;
844 while (input_line_pointer
< buffer_limit
)
846 bfd_boolean was_new_line
;
847 /* We have more of this buffer to parse. */
849 /* We now have input_line_pointer->1st char of next line.
850 If input_line_pointer [-1] == '\n' then we just
851 scanned another line: so bump line counters. */
852 was_new_line
= is_end_of_line
[(unsigned char) input_line_pointer
[-1]];
855 symbol_set_value_now (&dot_symbol
);
856 #ifdef md_start_line_hook
857 md_start_line_hook ();
859 if (input_line_pointer
[-1] == '\n')
860 bump_line_counters ();
864 /* If listing is on, and we are expanding a macro, then give
865 the listing code the contents of the expanded line. */
868 if ((listing
& LISTING_MACEXP
) && macro_nest
> 0)
870 /* Find the end of the current expanded macro line. */
871 s
= find_end_of_line (input_line_pointer
, flag_m68k_mri
);
879 /* Copy it for safe keeping. Also give an indication of
880 how much macro nesting is involved at this point. */
881 len
= s
- input_line_pointer
;
882 copy
= (char *) xmalloc (len
+ macro_nest
+ 2);
883 memset (copy
, '>', macro_nest
);
884 copy
[macro_nest
] = ' ';
885 memcpy (copy
+ macro_nest
+ 1, input_line_pointer
, len
);
886 copy
[macro_nest
+ 1 + len
] = '\0';
888 /* Install the line with the listing facility. */
889 listing_newline (copy
);
893 listing_newline (NULL
);
900 if (LABELS_WITHOUT_COLONS
|| flag_m68k_mri
)
902 next_char
= * input_line_pointer
;
903 /* Text at the start of a line must be a label, we
904 run down and stick a colon in. */
905 if (is_name_beginner (next_char
) || next_char
== '"')
910 HANDLE_CONDITIONAL_ASSEMBLY (0);
912 nul_char
= get_symbol_name (& line_start
);
913 next_char
= (nul_char
== '"' ? input_line_pointer
[1] : nul_char
);
915 /* In MRI mode, the EQU and MACRO pseudoops must
916 be handled specially. */
920 char *rest
= input_line_pointer
+ 1;
924 if (*rest
== ' ' || *rest
== '\t')
926 if ((strncasecmp (rest
, "EQU", 3) == 0
927 || strncasecmp (rest
, "SET", 3) == 0)
928 && (rest
[3] == ' ' || rest
[3] == '\t'))
930 input_line_pointer
= rest
+ 3;
932 strncasecmp (rest
, "SET", 3) == 0);
935 if (strncasecmp (rest
, "MACRO", 5) == 0
938 || is_end_of_line
[(unsigned char) rest
[5]]))
942 /* In MRI mode, we need to handle the MACRO
943 pseudo-op specially: we don't want to put the
944 symbol in the symbol table. */
946 #ifdef TC_START_LABEL_WITHOUT_COLON
947 && TC_START_LABEL_WITHOUT_COLON (nul_char
, next_char
)
950 line_label
= colon (line_start
);
952 line_label
= symbol_create (line_start
,
957 next_char
= restore_line_pointer (nul_char
);
958 if (next_char
== ':')
959 input_line_pointer
++;
964 /* We are at the beginning of a line, or similar place.
965 We expect a well-formed assembler statement.
966 A "symbol-name:" is a statement.
968 Depending on what compiler is used, the order of these tests
969 may vary to catch most common case 1st.
970 Each test is independent of all other tests at the (top)
973 nul_char
= next_char
= *input_line_pointer
++;
974 while (next_char
== '\t' || next_char
== ' ' || next_char
== '\f');
976 /* C is the 1st significant character.
977 Input_line_pointer points after that character. */
978 if (is_name_beginner (next_char
) || next_char
== '"')
982 /* Want user-defined label or pseudo/opcode. */
983 HANDLE_CONDITIONAL_ASSEMBLY (1);
985 --input_line_pointer
;
986 nul_char
= get_symbol_name (& s
); /* name's delimiter. */
987 next_char
= (nul_char
== '"' ? input_line_pointer
[1] : nul_char
);
988 rest
= input_line_pointer
+ (nul_char
== '"' ? 2 : 1);
990 /* NEXT_CHAR is character after symbol.
991 The end of symbol in the input line is now '\0'.
992 S points to the beginning of the symbol.
993 [In case of pseudo-op, s->'.'.]
994 Input_line_pointer->'\0' where NUL_CHAR was. */
995 if (TC_START_LABEL (s
, nul_char
, next_char
))
999 /* In MRI mode, \tsym: set 0 is permitted. */
1003 if (*rest
== ' ' || *rest
== '\t')
1006 if ((strncasecmp (rest
, "EQU", 3) == 0
1007 || strncasecmp (rest
, "SET", 3) == 0)
1008 && (rest
[3] == ' ' || rest
[3] == '\t'))
1010 input_line_pointer
= rest
+ 3;
1016 line_label
= colon (s
); /* User-defined label. */
1017 restore_line_pointer (nul_char
);
1018 ++ input_line_pointer
;
1019 #ifdef tc_check_label
1020 tc_check_label (line_label
);
1022 /* Input_line_pointer->after ':'. */
1025 else if ((next_char
== '=' && *rest
== '=')
1026 || ((next_char
== ' ' || next_char
== '\t')
1031 demand_empty_rest_of_line ();
1033 else if ((next_char
== '='
1034 || ((next_char
== ' ' || next_char
== '\t')
1036 #ifdef TC_EQUAL_IN_INSN
1037 && !TC_EQUAL_IN_INSN (next_char
, s
)
1042 demand_empty_rest_of_line ();
1046 /* Expect pseudo-op or machine instruction. */
1049 #ifndef TC_CASE_SENSITIVE
1053 strncpy (original_case_string
, s2
, sizeof (original_case_string
));
1054 original_case_string
[sizeof (original_case_string
) - 1] = 0;
1058 *s2
= TOLOWER (*s2
);
1063 if (NO_PSEUDO_DOT
|| flag_m68k_mri
)
1065 /* The MRI assembler uses pseudo-ops without
1067 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
);
1068 if (pop
!= NULL
&& pop
->poc_handler
== NULL
)
1073 || (!flag_m68k_mri
&& *s
== '.'))
1077 WARNING: next_char may be end-of-line.
1078 We lookup the pseudo-op table with s+1 because we
1079 already know that the pseudo-op begins with a '.'. */
1082 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
+ 1);
1083 if (pop
&& !pop
->poc_handler
)
1086 /* In MRI mode, we may need to insert an
1087 automatic alignment directive. What a hack
1089 if (mri_pending_align
1091 || !((pop
->poc_handler
== cons
1092 && pop
->poc_val
== 1)
1093 || (pop
->poc_handler
== s_space
1094 && pop
->poc_val
== 1)
1095 #ifdef tc_conditional_pseudoop
1096 || tc_conditional_pseudoop (pop
)
1098 || pop
->poc_handler
== s_if
1099 || pop
->poc_handler
== s_ifdef
1100 || pop
->poc_handler
== s_ifc
1101 || pop
->poc_handler
== s_ifeqs
1102 || pop
->poc_handler
== s_else
1103 || pop
->poc_handler
== s_endif
1104 || pop
->poc_handler
== s_globl
1105 || pop
->poc_handler
== s_ignore
)))
1107 do_align (1, (char *) NULL
, 0, 0);
1108 mri_pending_align
= 0;
1110 if (line_label
!= NULL
)
1112 symbol_set_frag (line_label
, frag_now
);
1113 S_SET_VALUE (line_label
, frag_now_fix ());
1117 /* Print the error msg now, while we still can. */
1120 char *end
= input_line_pointer
;
1122 (void) restore_line_pointer (nul_char
);
1124 nul_char
= next_char
= *--input_line_pointer
;
1125 *input_line_pointer
= '\0';
1126 if (! macro_defined
|| ! try_macro (next_char
, s
))
1129 as_bad (_("unknown pseudo-op: `%s'"), s
);
1130 *input_line_pointer
++ = nul_char
;
1135 /* Put it back for error messages etc. */
1136 next_char
= restore_line_pointer (nul_char
);
1137 /* The following skip of whitespace is compulsory.
1138 A well shaped space is sometimes all that separates
1139 keyword from operands. */
1140 if (next_char
== ' ' || next_char
== '\t')
1141 input_line_pointer
++;
1143 /* Input_line is restored.
1144 Input_line_pointer->1st non-blank char
1145 after pseudo-operation. */
1146 (*pop
->poc_handler
) (pop
->poc_val
);
1148 /* If that was .end, just get out now. */
1149 if (pop
->poc_handler
== s_end
)
1154 /* WARNING: next_char may be end-of-line. */
1155 /* Also: input_line_pointer->`\0` where nul_char was. */
1156 (void) restore_line_pointer (nul_char
);
1157 input_line_pointer
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 1, 0);
1158 next_char
= nul_char
= *input_line_pointer
;
1159 *input_line_pointer
= '\0';
1161 generate_lineno_debug ();
1163 if (macro_defined
&& try_macro (next_char
, s
))
1166 if (mri_pending_align
)
1168 do_align (1, (char *) NULL
, 0, 0);
1169 mri_pending_align
= 0;
1170 if (line_label
!= NULL
)
1172 symbol_set_frag (line_label
, frag_now
);
1173 S_SET_VALUE (line_label
, frag_now_fix ());
1177 assemble_one (s
); /* Assemble 1 instruction. */
1179 /* PR 19630: The backend may have set ilp to NULL
1180 if it encountered a catastrophic failure. */
1181 if (input_line_pointer
== NULL
)
1182 as_fatal (_("unable to continue with assembly."));
1184 *input_line_pointer
++ = nul_char
;
1186 /* We resume loop AFTER the end-of-line from
1187 this instruction. */
1193 /* Empty statement? */
1194 if (is_end_of_line
[(unsigned char) next_char
])
1197 if ((LOCAL_LABELS_DOLLAR
|| LOCAL_LABELS_FB
) && ISDIGIT (next_char
))
1199 /* local label ("4:") */
1200 char *backup
= input_line_pointer
;
1202 HANDLE_CONDITIONAL_ASSEMBLY (1);
1204 temp
= next_char
- '0';
1206 if (nul_char
== '"')
1207 ++ input_line_pointer
;
1209 /* Read the whole number. */
1210 while (ISDIGIT (*input_line_pointer
))
1212 temp
= (temp
* 10) + *input_line_pointer
- '0';
1213 ++input_line_pointer
;
1216 if (LOCAL_LABELS_DOLLAR
1217 && *input_line_pointer
== '$'
1218 && *(input_line_pointer
+ 1) == ':')
1220 input_line_pointer
+= 2;
1222 if (dollar_label_defined (temp
))
1224 as_fatal (_("label \"%d$\" redefined"), temp
);
1227 define_dollar_label (temp
);
1228 colon (dollar_label_name (temp
, 0));
1233 && *input_line_pointer
++ == ':')
1235 fb_label_instance_inc (temp
);
1236 colon (fb_label_name (temp
, 0));
1240 input_line_pointer
= backup
;
1243 if (next_char
&& strchr (line_comment_chars
, next_char
))
1244 { /* Its a comment. Better say APP or NO_APP. */
1249 unsigned int new_length
;
1252 s
= input_line_pointer
;
1253 if (strncmp (s
, "APP\n", 4))
1256 ignore_rest_of_line ();
1259 bump_line_counters ();
1262 ends
= strstr (s
, "#NO_APP\n");
1266 unsigned int tmp_len
;
1269 /* The end of the #APP wasn't in this buffer. We
1270 keep reading in buffers until we find the #NO_APP
1271 that goes with this #APP There is one. The specs
1273 tmp_len
= buffer_limit
- s
;
1274 tmp_buf
= (char *) xmalloc (tmp_len
+ 1);
1275 memcpy (tmp_buf
, s
, tmp_len
);
1278 new_tmp
= input_scrub_next_buffer (&buffer
);
1282 buffer_limit
= new_tmp
;
1283 input_line_pointer
= buffer
;
1284 ends
= strstr (buffer
, "#NO_APP\n");
1286 num
= ends
- buffer
;
1288 num
= buffer_limit
- buffer
;
1290 tmp_buf
= (char *) xrealloc (tmp_buf
, tmp_len
+ num
);
1291 memcpy (tmp_buf
+ tmp_len
, buffer
, num
);
1296 input_line_pointer
= ends
? ends
+ 8 : NULL
;
1304 input_line_pointer
= ends
+ 8;
1308 scrub_string_end
= ends
;
1310 new_length
= ends
- s
;
1311 new_buf
= (char *) xmalloc (new_length
);
1318 space
= (new_buf
+ new_length
) - new_tmp
;
1319 size
= do_scrub_chars (scrub_from_string
, new_tmp
, space
);
1327 new_buf
= (char *) xrealloc (new_buf
, new_length
+ 100);
1328 new_tmp
= new_buf
+ new_length
;
1335 /* We've "scrubbed" input to the preferred format. In the
1336 process we may have consumed the whole of the remaining
1337 file (and included files). We handle this formatted
1338 input similar to that of macro expansion, letting
1339 actual macro expansion (possibly nested) and other
1340 input expansion work. Beware that in messages, line
1341 numbers and possibly file names will be incorrect. */
1342 new_length
= strlen (new_buf
);
1343 sb_build (&sbuf
, new_length
);
1344 sb_add_buffer (&sbuf
, new_buf
, new_length
);
1345 input_scrub_include_sb (&sbuf
, input_line_pointer
, 0);
1347 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1352 HANDLE_CONDITIONAL_ASSEMBLY (1);
1354 #ifdef tc_unrecognized_line
1355 if (tc_unrecognized_line (next_char
))
1358 input_line_pointer
--;
1359 /* Report unknown char as error. */
1360 demand_empty_rest_of_line ();
1365 symbol_set_value_now (&dot_symbol
);
1367 #ifdef HANDLE_BUNDLE
1368 if (bundle_lock_frag
!= NULL
)
1370 as_bad_where (bundle_lock_frag
->fr_file
, bundle_lock_frag
->fr_line
,
1371 _(".bundle_lock with no matching .bundle_unlock"));
1372 bundle_lock_frag
= NULL
;
1373 bundle_lock_frchain
= NULL
;
1374 bundle_lock_depth
= 0;
1381 /* Close the input file. */
1382 input_scrub_close ();
1383 #ifdef WARN_COMMENTS
1385 if (warn_comment
&& found_comment
)
1386 as_warn_where (found_comment_file
, found_comment
,
1387 "first comment found here");
1392 /* Convert O_constant expression EXP into the equivalent O_big representation.
1393 Take the sign of the number from SIGN rather than X_add_number. */
1396 convert_to_bignum (expressionS
*exp
, int sign
)
1401 value
= exp
->X_add_number
;
1402 for (i
= 0; i
< sizeof (exp
->X_add_number
) / CHARS_PER_LITTLENUM
; i
++)
1404 generic_bignum
[i
] = value
& LITTLENUM_MASK
;
1405 value
>>= LITTLENUM_NUMBER_OF_BITS
;
1407 /* Add a sequence of sign bits if the top bit of X_add_number is not
1408 the sign of the original value. */
1409 if ((exp
->X_add_number
< 0) == !sign
)
1410 generic_bignum
[i
++] = sign
? LITTLENUM_MASK
: 0;
1412 exp
->X_add_number
= i
;
1415 /* For most MRI pseudo-ops, the line actually ends at the first
1416 nonquoted space. This function looks for that point, stuffs a null
1417 in, and sets *STOPCP to the character that used to be there, and
1418 returns the location.
1420 Until I hear otherwise, I am going to assume that this is only true
1421 for the m68k MRI assembler. */
1424 mri_comment_field (char *stopcp
)
1430 know (flag_m68k_mri
);
1432 for (s
= input_line_pointer
;
1433 ((!is_end_of_line
[(unsigned char) *s
] && *s
!= ' ' && *s
!= '\t')
1441 for (s
= input_line_pointer
;
1442 !is_end_of_line
[(unsigned char) *s
];
1452 /* Skip to the end of an MRI comment field. */
1455 mri_comment_end (char *stop
, int stopc
)
1459 input_line_pointer
= stop
;
1461 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1462 ++input_line_pointer
;
1466 s_abort (int ignore ATTRIBUTE_UNUSED
)
1468 as_fatal (_(".abort detected. Abandoning ship."));
1471 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1472 (in bytes). A negative ARG is the negative of the length of the
1473 fill pattern. BYTES_P is non-zero if the alignment value should be
1474 interpreted as the byte boundary, rather than the power of 2. */
1475 #ifndef TC_ALIGN_LIMIT
1476 #define TC_ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1480 s_align (signed int arg
, int bytes_p
)
1482 unsigned int align_limit
= TC_ALIGN_LIMIT
;
1491 stop
= mri_comment_field (&stopc
);
1493 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1498 align
= arg
; /* Default value from pseudo-op table. */
1502 align
= get_absolute_expression ();
1505 #ifdef TC_ALIGN_ZERO_IS_DEFAULT
1506 if (arg
> 0 && align
== 0)
1513 /* Convert to a power of 2. */
1518 for (i
= 0; (align
& 1) == 0; align
>>= 1, ++i
)
1521 as_bad (_("alignment not a power of 2"));
1527 if (align
> align_limit
)
1529 align
= align_limit
;
1530 as_warn (_("alignment too large: %u assumed"), align
);
1533 if (*input_line_pointer
!= ',')
1540 ++input_line_pointer
;
1541 if (*input_line_pointer
== ',')
1545 fill
= get_absolute_expression ();
1550 if (*input_line_pointer
!= ',')
1554 ++input_line_pointer
;
1555 max
= get_absolute_expression ();
1562 as_warn (_("expected fill pattern missing"));
1563 do_align (align
, (char *) NULL
, 0, max
);
1567 unsigned int fill_len
;
1579 do_align (align
, &fill_char
, fill_len
, max
);
1585 if ((size_t) fill_len
> sizeof ab
)
1587 as_warn (_("fill pattern too long, truncating to %u"),
1588 (unsigned) sizeof ab
);
1589 fill_len
= sizeof ab
;
1592 md_number_to_chars (ab
, fill
, fill_len
);
1593 do_align (align
, ab
, fill_len
, max
);
1597 demand_empty_rest_of_line ();
1600 mri_comment_end (stop
, stopc
);
1603 /* Handle the .align pseudo-op on machines where ".align 4" means
1604 align to a 4 byte boundary. */
1607 s_align_bytes (int arg
)
1612 /* Handle the .align pseudo-op on machines where ".align 4" means align
1613 to a 2**4 boundary. */
1616 s_align_ptwo (int arg
)
1621 /* Switch in and out of alternate macro mode. */
1626 demand_empty_rest_of_line ();
1627 macro_set_alternate (on
);
1630 /* Read a symbol name from input_line_pointer.
1632 Stores the symbol name in a buffer and returns a pointer to this buffer.
1633 The buffer is xalloc'ed. It is the caller's responsibility to free
1636 The name is not left in the i_l_p buffer as it may need processing
1637 to handle escape characters.
1639 Advances i_l_p to the next non-whitespace character.
1641 If a symbol name could not be read, the routine issues an error
1642 messages, skips to the end of the line and returns NULL. */
1645 read_symbol_name (void)
1651 c
= *input_line_pointer
++;
1655 #define SYM_NAME_CHUNK_LEN 128
1656 ptrdiff_t len
= SYM_NAME_CHUNK_LEN
;
1660 start
= name
= xmalloc (len
+ 1);
1662 name_end
= name
+ SYM_NAME_CHUNK_LEN
;
1664 while (is_a_char (C
= next_char_of_string ()))
1666 if (name
>= name_end
)
1670 sofar
= name
- start
;
1671 len
+= SYM_NAME_CHUNK_LEN
;
1672 start
= xrealloc (start
, len
+ 1);
1673 name_end
= start
+ len
;
1674 name
= start
+ sofar
;
1681 /* Since quoted symbol names can contain non-ASCII characters,
1682 check the string and warn if it cannot be recognised by the
1683 current character set. */
1684 if (mbstowcs (NULL
, name
, len
) == (size_t) -1)
1685 as_warn (_("symbol name not recognised in the current locale"));
1687 else if (is_name_beginner (c
) || c
== '\001')
1691 name
= input_line_pointer
- 1;
1693 /* We accept \001 in a name in case this is
1694 being called with a constructed string. */
1695 while (is_part_of_name (c
= *input_line_pointer
++)
1699 len
= (input_line_pointer
- name
) - 1;
1700 start
= xmalloc (len
+ 1);
1702 memcpy (start
, name
, len
);
1705 /* Skip a name ender char if one is present. */
1706 if (! is_name_ender (c
))
1707 --input_line_pointer
;
1710 name
= start
= NULL
;
1714 as_bad (_("expected symbol name"));
1715 ignore_rest_of_line ();
1726 s_comm_internal (int param
,
1727 symbolS
*(*comm_parse_extra
) (int, symbolS
*, addressT
))
1731 symbolS
*symbolP
= NULL
;
1737 stop
= mri_comment_field (&stopc
);
1739 if ((name
= read_symbol_name ()) == NULL
)
1742 /* Accept an optional comma after the name. The comma used to be
1743 required, but Irix 5 cc does not generate it for .lcomm. */
1744 if (*input_line_pointer
== ',')
1745 input_line_pointer
++;
1747 temp
= get_absolute_expr (&exp
);
1749 size
&= ((addressT
) 2 << (stdoutput
->arch_info
->bits_per_address
- 1)) - 1;
1750 if (exp
.X_op
== O_absent
)
1752 as_bad (_("missing size expression"));
1753 ignore_rest_of_line ();
1756 else if (temp
!= size
|| !exp
.X_unsigned
)
1758 as_warn (_("size (%ld) out of range, ignored"), (long) temp
);
1759 ignore_rest_of_line ();
1763 symbolP
= symbol_find_or_make (name
);
1764 if ((S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
1765 && !S_IS_COMMON (symbolP
))
1767 if (!S_IS_VOLATILE (symbolP
))
1770 as_bad (_("symbol `%s' is already defined"), name
);
1771 ignore_rest_of_line ();
1774 symbolP
= symbol_clone (symbolP
, 1);
1775 S_SET_SEGMENT (symbolP
, undefined_section
);
1776 S_SET_VALUE (symbolP
, 0);
1777 symbol_set_frag (symbolP
, &zero_address_frag
);
1778 S_CLEAR_VOLATILE (symbolP
);
1781 size
= S_GET_VALUE (symbolP
);
1784 else if (size
!= temp
)
1785 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1786 name
, (long) size
, (long) temp
);
1788 if (comm_parse_extra
!= NULL
)
1789 symbolP
= (*comm_parse_extra
) (param
, symbolP
, size
);
1792 S_SET_VALUE (symbolP
, (valueT
) size
);
1793 S_SET_EXTERNAL (symbolP
);
1794 S_SET_SEGMENT (symbolP
, bfd_com_section_ptr
);
1797 demand_empty_rest_of_line ();
1800 mri_comment_end (stop
, stopc
);
1809 s_comm_internal (ignore
, NULL
);
1812 /* The MRI COMMON pseudo-op. We handle this by creating a common
1813 symbol with the appropriate name. We make s_space do the right
1814 thing by increasing the size. */
1817 s_mri_common (int small ATTRIBUTE_UNUSED
)
1833 stop
= mri_comment_field (&stopc
);
1837 name
= input_line_pointer
;
1838 if (!ISDIGIT (*name
))
1839 c
= get_symbol_name (& name
);
1844 ++input_line_pointer
;
1846 while (ISDIGIT (*input_line_pointer
));
1848 c
= *input_line_pointer
;
1849 *input_line_pointer
= '\0';
1851 if (line_label
!= NULL
)
1853 alc
= (char *) xmalloc (strlen (S_GET_NAME (line_label
))
1854 + (input_line_pointer
- name
)
1856 sprintf (alc
, "%s%s", name
, S_GET_NAME (line_label
));
1861 sym
= symbol_find_or_make (name
);
1862 c
= restore_line_pointer (c
);
1866 if (*input_line_pointer
!= ',')
1870 ++input_line_pointer
;
1871 align
= get_absolute_expression ();
1874 if (S_IS_DEFINED (sym
) && !S_IS_COMMON (sym
))
1876 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym
));
1877 ignore_rest_of_line ();
1878 mri_comment_end (stop
, stopc
);
1882 S_SET_EXTERNAL (sym
);
1883 S_SET_SEGMENT (sym
, bfd_com_section_ptr
);
1884 mri_common_symbol
= sym
;
1888 S_SET_ALIGN (sym
, align
);
1893 if (line_label
!= NULL
)
1896 exp
.X_op
= O_symbol
;
1897 exp
.X_add_symbol
= sym
;
1898 exp
.X_add_number
= 0;
1899 symbol_set_value_expression (line_label
, &exp
);
1900 symbol_set_frag (line_label
, &zero_address_frag
);
1901 S_SET_SEGMENT (line_label
, expr_section
);
1904 /* FIXME: We just ignore the small argument, which distinguishes
1905 COMMON and COMMON.S. I don't know what we can do about it. */
1907 /* Ignore the type and hptype. */
1908 if (*input_line_pointer
== ',')
1909 input_line_pointer
+= 2;
1910 if (*input_line_pointer
== ',')
1911 input_line_pointer
+= 2;
1913 demand_empty_rest_of_line ();
1915 mri_comment_end (stop
, stopc
);
1919 s_data (int ignore ATTRIBUTE_UNUSED
)
1924 temp
= get_absolute_expression ();
1925 if (flag_readonly_data_in_text
)
1927 section
= text_section
;
1931 section
= data_section
;
1933 subseg_set (section
, (subsegT
) temp
);
1935 demand_empty_rest_of_line ();
1938 /* Handle the .appfile pseudo-op. This is automatically generated by
1939 do_scrub_chars when a preprocessor # line comment is seen with a
1940 file name. This default definition may be overridden by the object
1941 or CPU specific pseudo-ops. This function is also the default
1942 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1946 s_app_file_string (char *file
, int appfile ATTRIBUTE_UNUSED
)
1950 listing_source_file (file
);
1952 register_dependency (file
);
1954 obj_app_file (file
, appfile
);
1959 s_app_file (int appfile
)
1964 /* Some assemblers tolerate immediately following '"'. */
1965 if ((s
= demand_copy_string (&length
)) != 0)
1968 = (!new_logical_line_flags (s
, -1, 1) && appfile
);
1970 /* In MRI mode, the preprocessor may have inserted an extraneous
1973 && *input_line_pointer
== '\''
1974 && is_end_of_line
[(unsigned char) input_line_pointer
[1]])
1975 ++input_line_pointer
;
1977 demand_empty_rest_of_line ();
1979 s_app_file_string (s
, appfile
);
1984 get_linefile_number (int *flag
)
1988 if (*input_line_pointer
< '0' || *input_line_pointer
> '9')
1991 *flag
= get_absolute_expression ();
1996 /* Handle the .appline pseudo-op. This is automatically generated by
1997 do_scrub_chars when a preprocessor # line comment is seen. This
1998 default definition may be overridden by the object or CPU specific
2002 s_app_line (int appline
)
2007 /* The given number is that of the next line. */
2009 l
= get_absolute_expression ();
2010 else if (!get_linefile_number (&l
))
2012 ignore_rest_of_line ();
2019 /* Some of the back ends can't deal with non-positive line numbers.
2020 Besides, it's silly. GCC however will generate a line number of
2021 zero when it is pre-processing builtins for assembler-with-cpp files:
2025 We do not want to barf on this, especially since such files are used
2026 in the GCC and GDB testsuites. So we check for negative line numbers
2027 rather than non-positive line numbers. */
2028 as_warn (_("line numbers must be positive; line number %d rejected"),
2039 if (*input_line_pointer
== '"')
2040 file
= demand_copy_string (&length
);
2046 while (get_linefile_number (&this_flag
))
2049 /* From GCC's cpp documentation:
2050 1: start of a new file.
2051 2: returning to a file after having included
2053 3: following text comes from a system header file.
2054 4: following text should be treated as extern "C".
2056 4 is nonsensical for the assembler; 3, we don't
2057 care about, so we ignore it just in case a
2058 system header file is included while
2059 preprocessing assembly. So 1 and 2 are all we
2060 care about, and they are mutually incompatible.
2061 new_logical_line_flags() demands this. */
2064 if (flags
&& flags
!= (1 << this_flag
))
2065 as_warn (_("incompatible flag %i in line directive"),
2068 flags
|= 1 << this_flag
;
2073 /* We ignore these. */
2077 as_warn (_("unsupported flag %i in line directive"),
2082 if (!is_end_of_line
[(unsigned char)*input_line_pointer
])
2087 if (appline
|| file
)
2089 new_logical_line_flags (file
, l
, flags
);
2092 listing_source_line (l
);
2096 if (appline
|| file
)
2097 demand_empty_rest_of_line ();
2099 ignore_rest_of_line ();
2102 /* Handle the .end pseudo-op. Actually, the real work is done in
2103 read_a_source_file. */
2106 s_end (int ignore ATTRIBUTE_UNUSED
)
2110 /* The MRI assembler permits the start symbol to follow .end,
2111 but we don't support that. */
2113 if (!is_end_of_line
[(unsigned char) *input_line_pointer
]
2114 && *input_line_pointer
!= '*'
2115 && *input_line_pointer
!= '!')
2116 as_warn (_("start address not supported"));
2120 /* Handle the .err pseudo-op. */
2123 s_err (int ignore ATTRIBUTE_UNUSED
)
2125 as_bad (_(".err encountered"));
2126 demand_empty_rest_of_line ();
2129 /* Handle the .error and .warning pseudo-ops. */
2135 /* The purpose for the conditional assignment is not to
2136 internationalize the directive itself, but that we need a
2137 self-contained message, one that can be passed like the
2138 demand_copy_C_string return value, and with no assumption on the
2139 location of the name of the directive within the message. */
2141 = (err
? _(".error directive invoked in source file")
2142 : _(".warning directive invoked in source file"));
2144 if (!is_it_end_of_statement ())
2146 if (*input_line_pointer
!= '\"')
2148 as_bad (_("%s argument must be a string"),
2149 err
? ".error" : ".warning");
2150 ignore_rest_of_line ();
2154 msg
= demand_copy_C_string (&len
);
2162 as_warn ("%s", msg
);
2163 demand_empty_rest_of_line ();
2166 /* Handle the MRI fail pseudo-op. */
2169 s_fail (int ignore ATTRIBUTE_UNUSED
)
2176 stop
= mri_comment_field (&stopc
);
2178 temp
= get_absolute_expression ();
2180 as_warn (_(".fail %ld encountered"), (long) temp
);
2182 as_bad (_(".fail %ld encountered"), (long) temp
);
2184 demand_empty_rest_of_line ();
2187 mri_comment_end (stop
, stopc
);
2191 s_fill (int ignore ATTRIBUTE_UNUSED
)
2193 expressionS rep_exp
;
2198 #ifdef md_flush_pending_output
2199 md_flush_pending_output ();
2202 #ifdef md_cons_align
2206 get_known_segmented_expression (&rep_exp
);
2207 if (*input_line_pointer
== ',')
2209 input_line_pointer
++;
2210 size
= get_absolute_expression ();
2211 if (*input_line_pointer
== ',')
2213 input_line_pointer
++;
2214 fill
= get_absolute_expression ();
2218 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
2219 #define BSD_FILL_SIZE_CROCK_8 (8)
2220 if (size
> BSD_FILL_SIZE_CROCK_8
)
2222 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8
);
2223 size
= BSD_FILL_SIZE_CROCK_8
;
2227 as_warn (_("size negative; .fill ignored"));
2230 else if (rep_exp
.X_op
== O_constant
&& rep_exp
.X_add_number
<= 0)
2232 if (rep_exp
.X_add_number
< 0)
2233 as_warn (_("repeat < 0; .fill ignored"));
2237 if (size
&& !need_pass_2
)
2239 if (now_seg
== absolute_section
)
2241 if (rep_exp
.X_op
!= O_constant
)
2242 as_bad (_("non-constant fill count for absolute section"));
2243 else if (fill
&& rep_exp
.X_add_number
!= 0)
2244 as_bad (_("attempt to fill absolute section with non-zero value"));
2245 abs_section_offset
+= rep_exp
.X_add_number
* size
;
2248 && (rep_exp
.X_op
!= O_constant
|| rep_exp
.X_add_number
!= 0)
2250 as_bad (_("attempt to fill section `%s' with non-zero value"),
2251 segment_name (now_seg
));
2253 if (rep_exp
.X_op
== O_constant
)
2255 p
= frag_var (rs_fill
, (int) size
, (int) size
,
2256 (relax_substateT
) 0, (symbolS
*) 0,
2257 (offsetT
) rep_exp
.X_add_number
,
2262 /* We don't have a constant repeat count, so we can't use
2263 rs_fill. We can get the same results out of rs_space,
2264 but its argument is in bytes, so we must multiply the
2265 repeat count by size. */
2268 rep_sym
= make_expr_symbol (&rep_exp
);
2271 expressionS size_exp
;
2272 size_exp
.X_op
= O_constant
;
2273 size_exp
.X_add_number
= size
;
2275 rep_exp
.X_op
= O_multiply
;
2276 rep_exp
.X_add_symbol
= rep_sym
;
2277 rep_exp
.X_op_symbol
= make_expr_symbol (&size_exp
);
2278 rep_exp
.X_add_number
= 0;
2279 rep_sym
= make_expr_symbol (&rep_exp
);
2282 p
= frag_var (rs_space
, (int) size
, (int) size
,
2283 (relax_substateT
) 0, rep_sym
, (offsetT
) 0, (char *) 0);
2286 memset (p
, 0, (unsigned int) size
);
2288 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
2289 flavoured AS. The following bizarre behaviour is to be
2290 compatible with above. I guess they tried to take up to 8
2291 bytes from a 4-byte expression and they forgot to sign
2293 #define BSD_FILL_SIZE_CROCK_4 (4)
2294 md_number_to_chars (p
, (valueT
) fill
,
2295 (size
> BSD_FILL_SIZE_CROCK_4
2296 ? BSD_FILL_SIZE_CROCK_4
2298 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
2299 but emits no error message because it seems a legal thing to do.
2300 It is a degenerate case of .fill but could be emitted by a
2303 demand_empty_rest_of_line ();
2307 s_globl (int ignore ATTRIBUTE_UNUSED
)
2316 stop
= mri_comment_field (&stopc
);
2320 if ((name
= read_symbol_name ()) == NULL
)
2323 symbolP
= symbol_find_or_make (name
);
2324 S_SET_EXTERNAL (symbolP
);
2327 c
= *input_line_pointer
;
2330 input_line_pointer
++;
2332 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
2340 demand_empty_rest_of_line ();
2343 mri_comment_end (stop
, stopc
);
2346 /* Handle the MRI IRP and IRPC pseudo-ops. */
2358 file
= as_where (&line
);
2360 eol
= find_end_of_line (input_line_pointer
, 0);
2361 sb_build (&s
, eol
- input_line_pointer
);
2362 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2363 input_line_pointer
= eol
;
2367 err
= expand_irp (irpc
, 0, &s
, &out
, get_non_macro_line_sb
);
2369 as_bad_where (file
, line
, "%s", err
);
2373 input_scrub_include_sb (&out
, input_line_pointer
, 1);
2375 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2378 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2379 the section to only be linked once. However, this is not supported
2380 by most object file formats. This takes an optional argument,
2381 which is what to do about duplicates. */
2384 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
2386 enum linkonce_type type
;
2390 type
= LINKONCE_DISCARD
;
2392 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
2397 c
= get_symbol_name (& s
);
2398 if (strcasecmp (s
, "discard") == 0)
2399 type
= LINKONCE_DISCARD
;
2400 else if (strcasecmp (s
, "one_only") == 0)
2401 type
= LINKONCE_ONE_ONLY
;
2402 else if (strcasecmp (s
, "same_size") == 0)
2403 type
= LINKONCE_SAME_SIZE
;
2404 else if (strcasecmp (s
, "same_contents") == 0)
2405 type
= LINKONCE_SAME_CONTENTS
;
2407 as_warn (_("unrecognized .linkonce type `%s'"), s
);
2409 (void) restore_line_pointer (c
);
2412 #ifdef obj_handle_link_once
2413 obj_handle_link_once (type
);
2414 #else /* ! defined (obj_handle_link_once) */
2418 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
2419 as_warn (_(".linkonce is not supported for this object file format"));
2421 flags
= bfd_get_section_flags (stdoutput
, now_seg
);
2422 flags
|= SEC_LINK_ONCE
;
2427 case LINKONCE_DISCARD
:
2428 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
2430 case LINKONCE_ONE_ONLY
:
2431 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
2433 case LINKONCE_SAME_SIZE
:
2434 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
2436 case LINKONCE_SAME_CONTENTS
:
2437 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
2440 if (!bfd_set_section_flags (stdoutput
, now_seg
, flags
))
2441 as_bad (_("bfd_set_section_flags: %s"),
2442 bfd_errmsg (bfd_get_error ()));
2444 #endif /* ! defined (obj_handle_link_once) */
2446 demand_empty_rest_of_line ();
2450 bss_alloc (symbolS
*symbolP
, addressT size
, unsigned int align
)
2453 segT current_seg
= now_seg
;
2454 subsegT current_subseg
= now_subseg
;
2455 segT bss_seg
= bss_section
;
2457 #if defined (TC_MIPS) || defined (TC_ALPHA)
2458 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
2459 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
2461 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2462 if (size
<= bfd_get_gp_size (stdoutput
))
2464 bss_seg
= subseg_new (".sbss", 1);
2465 seg_info (bss_seg
)->bss
= 1;
2466 if (!bfd_set_section_flags (stdoutput
, bss_seg
, SEC_ALLOC
))
2467 as_warn (_("error setting flags for \".sbss\": %s"),
2468 bfd_errmsg (bfd_get_error ()));
2472 subseg_set (bss_seg
, 1);
2474 if (align
> OCTETS_PER_BYTE_POWER
)
2476 record_alignment (bss_seg
, align
);
2477 frag_align (align
, 0, 0);
2480 /* Detach from old frag. */
2481 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2482 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2484 symbol_set_frag (symbolP
, frag_now
);
2485 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
, NULL
);
2489 S_SET_SIZE (symbolP
, size
);
2491 S_SET_SEGMENT (symbolP
, bss_seg
);
2494 /* The symbol may already have been created with a preceding
2495 ".globl" directive -- be careful not to step on storage class
2496 in that case. Otherwise, set it to static. */
2497 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2498 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2499 #endif /* OBJ_COFF */
2501 subseg_set (current_seg
, current_subseg
);
2505 parse_align (int align_bytes
)
2511 if (*input_line_pointer
!= ',')
2514 as_bad (_("expected alignment after size"));
2515 ignore_rest_of_line ();
2519 input_line_pointer
++;
2522 align
= get_absolute_expr (&exp
);
2523 if (exp
.X_op
== O_absent
)
2526 if (!exp
.X_unsigned
)
2528 as_warn (_("alignment negative; 0 assumed"));
2532 if (align_bytes
&& align
!= 0)
2534 /* convert to a power of 2 alignment */
2535 unsigned int alignp2
= 0;
2536 while ((align
& 1) == 0)
2537 align
>>= 1, ++alignp2
;
2540 as_bad (_("alignment not a power of 2"));
2541 ignore_rest_of_line ();
2549 /* Called from s_comm_internal after symbol name and size have been
2550 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2551 1 if this was a ".bss" directive which has a 3rd argument
2552 (alignment as a power of 2), or 2 if this was a ".bss" directive
2553 with alignment in bytes. */
2556 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2562 align
= parse_align (needs_align
- 1);
2563 if (align
== (addressT
) -1)
2567 /* Assume some objects may require alignment on some systems. */
2568 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2570 bss_alloc (symbolP
, size
, align
);
2575 s_lcomm (int needs_align
)
2577 s_comm_internal (needs_align
, s_lcomm_internal
);
2581 s_lcomm_bytes (int needs_align
)
2583 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2587 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2593 /* We permit ANY defined expression: BSD4.2 demands constants. */
2594 if ((name
= read_symbol_name ()) == NULL
)
2597 if (*input_line_pointer
!= ',')
2599 as_bad (_("expected comma after \"%s\""), name
);
2603 input_line_pointer
++;
2604 expression_and_evaluate (&exp
);
2606 if (exp
.X_op
!= O_constant
2607 && exp
.X_op
!= O_register
)
2609 as_bad (_("bad expression"));
2613 symbolP
= symbol_find_or_make (name
);
2615 if (S_GET_SEGMENT (symbolP
) == undefined_section
)
2617 /* The name might be an undefined .global symbol; be sure to
2618 keep the "external" bit. */
2619 S_SET_SEGMENT (symbolP
,
2620 (exp
.X_op
== O_constant
2623 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2627 as_bad (_("symbol `%s' is already defined"), name
);
2630 demand_empty_rest_of_line ();
2635 ignore_rest_of_line ();
2640 /* Read a line into an sb. Returns the character that ended the line
2641 or zero if there are no more lines. */
2644 get_line_sb (sb
*line
, int in_macro
)
2648 if (input_line_pointer
[-1] == '\n')
2649 bump_line_counters ();
2651 if (input_line_pointer
>= buffer_limit
)
2653 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2654 if (buffer_limit
== 0)
2658 eol
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 0, in_macro
);
2659 sb_add_buffer (line
, input_line_pointer
, eol
- input_line_pointer
);
2660 input_line_pointer
= eol
;
2662 /* Don't skip multiple end-of-line characters, because that breaks support
2663 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2664 characters but isn't. Instead just skip one end of line character and
2665 return the character skipped so that the caller can re-insert it if
2667 return *input_line_pointer
++;
2671 get_non_macro_line_sb (sb
*line
)
2673 return get_line_sb (line
, 0);
2677 get_macro_line_sb (sb
*line
)
2679 return get_line_sb (line
, 1);
2682 /* Define a macro. This is an interface to macro.c. */
2685 s_macro (int ignore ATTRIBUTE_UNUSED
)
2694 file
= as_where (&line
);
2696 eol
= find_end_of_line (input_line_pointer
, 0);
2697 sb_build (&s
, eol
- input_line_pointer
);
2698 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2699 input_line_pointer
= eol
;
2701 if (line_label
!= NULL
)
2706 name
= S_GET_NAME (line_label
);
2707 len
= strlen (name
);
2708 sb_build (&label
, len
);
2709 sb_add_buffer (&label
, name
, len
);
2710 err
= define_macro (0, &s
, &label
, get_macro_line_sb
, file
, line
, &name
);
2714 err
= define_macro (0, &s
, NULL
, get_macro_line_sb
, file
, line
, &name
);
2716 as_bad_where (file
, line
, err
, name
);
2719 if (line_label
!= NULL
)
2721 S_SET_SEGMENT (line_label
, absolute_section
);
2722 S_SET_VALUE (line_label
, 0);
2723 symbol_set_frag (line_label
, &zero_address_frag
);
2726 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2727 && hash_find (po_hash
, name
) != NULL
)
2730 && hash_find (po_hash
, name
+ 1) != NULL
))
2731 as_warn_where (file
,
2733 _("attempt to redefine pseudo-op `%s' ignored"),
2740 /* Handle the .mexit pseudo-op, which immediately exits a macro
2744 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2748 cond_exit_macro (macro_nest
);
2749 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2752 as_warn (_("ignoring macro exit outside a macro definition."));
2755 /* Switch in and out of MRI mode. */
2758 s_mri (int ignore ATTRIBUTE_UNUSED
)
2761 #ifdef MRI_MODE_CHANGE
2765 on
= get_absolute_expression ();
2766 #ifdef MRI_MODE_CHANGE
2767 old_flag
= flag_mri
;
2786 /* Operator precedence changes in m68k MRI mode, so we need to
2787 update the operator rankings. */
2788 expr_set_precedence ();
2790 #ifdef MRI_MODE_CHANGE
2792 MRI_MODE_CHANGE (on
);
2795 demand_empty_rest_of_line ();
2798 /* Handle changing the location counter. */
2801 do_org (segT segment
, expressionS
*exp
, int fill
)
2803 if (segment
!= now_seg
2804 && segment
!= absolute_section
2805 && segment
!= expr_section
)
2806 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2808 if (now_seg
== absolute_section
)
2811 as_warn (_("ignoring fill value in absolute section"));
2812 if (exp
->X_op
!= O_constant
)
2814 as_bad (_("only constant offsets supported in absolute section"));
2815 exp
->X_add_number
= 0;
2817 abs_section_offset
= exp
->X_add_number
;
2822 symbolS
*sym
= exp
->X_add_symbol
;
2823 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2825 if (fill
&& in_bss ())
2826 as_warn (_("ignoring fill value in section `%s'"),
2827 segment_name (now_seg
));
2829 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2831 /* Handle complex expressions. */
2832 sym
= make_expr_symbol (exp
);
2836 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2842 s_org (int ignore ATTRIBUTE_UNUSED
)
2848 #ifdef md_flush_pending_output
2849 md_flush_pending_output ();
2852 /* The m68k MRI assembler has a different meaning for .org. It
2853 means to create an absolute section at a given address. We can't
2854 support that--use a linker script instead. */
2857 as_bad (_("MRI style ORG pseudo-op not supported"));
2858 ignore_rest_of_line ();
2862 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2863 thing as a sub-segment-relative origin. Any absolute origin is
2864 given a warning, then assumed to be segment-relative. Any
2865 segmented origin expression ("foo+42") had better be in the right
2866 segment or the .org is ignored.
2868 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2869 we never know sub-segment sizes when we are reading code. BSD
2870 will crash trying to emit negative numbers of filler bytes in
2871 certain .orgs. We don't crash, but see as-write for that code.
2873 Don't make frag if need_pass_2==1. */
2874 segment
= get_known_segmented_expression (&exp
);
2875 if (*input_line_pointer
== ',')
2877 input_line_pointer
++;
2878 temp_fill
= get_absolute_expression ();
2884 do_org (segment
, &exp
, temp_fill
);
2886 demand_empty_rest_of_line ();
2889 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2890 called by the obj-format routine which handles section changing
2891 when in MRI mode. It will create a new section, and return it. It
2892 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2893 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2896 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2906 name
= input_line_pointer
;
2907 if (!ISDIGIT (*name
))
2908 c
= get_symbol_name (& name
);
2913 ++input_line_pointer
;
2915 while (ISDIGIT (*input_line_pointer
));
2917 c
= *input_line_pointer
;
2918 *input_line_pointer
= '\0';
2921 name
= xstrdup (name
);
2923 c
= restore_line_pointer (c
);
2925 seg
= subseg_new (name
, 0);
2931 ++input_line_pointer
;
2932 align
= get_absolute_expression ();
2933 record_alignment (seg
, align
);
2937 if (*input_line_pointer
== ',')
2939 c
= *++input_line_pointer
;
2941 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
2944 as_bad (_("unrecognized section type"));
2945 ++input_line_pointer
;
2950 flags
= SEC_NO_FLAGS
;
2952 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
2953 else if (*type
== 'D' || *type
== 'M')
2954 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
2955 else if (*type
== 'R')
2956 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
2957 if (flags
!= SEC_NO_FLAGS
)
2959 if (!bfd_set_section_flags (stdoutput
, seg
, flags
))
2960 as_warn (_("error setting flags for \"%s\": %s"),
2961 bfd_section_name (stdoutput
, seg
),
2962 bfd_errmsg (bfd_get_error ()));
2967 /* Ignore the HP type. */
2968 if (*input_line_pointer
== ',')
2969 input_line_pointer
+= 2;
2971 demand_empty_rest_of_line ();
2973 #else /* ! TC_M68K */
2982 c
= get_symbol_name (& name
);
2984 name
= xstrdup (name
);
2986 c
= restore_line_pointer (c
);
2988 seg
= subseg_new (name
, 0);
2996 ++input_line_pointer
;
2998 c
= get_symbol_name (& sectype
);
2999 if (*sectype
== '\0')
3001 else if (strcasecmp (sectype
, "text") == 0)
3003 else if (strcasecmp (sectype
, "data") == 0)
3005 else if (strcasecmp (sectype
, "romdata") == 0)
3008 as_warn (_("unrecognized section type `%s'"), sectype
);
3009 (void) restore_line_pointer (c
);
3012 if (*input_line_pointer
== ',')
3016 ++input_line_pointer
;
3018 c
= get_symbol_name (& seccmd
);
3019 if (strcasecmp (seccmd
, "absolute") == 0)
3021 as_bad (_("absolute sections are not supported"));
3022 *input_line_pointer
= c
;
3023 ignore_rest_of_line ();
3026 else if (strcasecmp (seccmd
, "align") == 0)
3030 (void) restore_line_pointer (c
);
3031 align
= get_absolute_expression ();
3032 record_alignment (seg
, align
);
3036 as_warn (_("unrecognized section command `%s'"), seccmd
);
3037 (void) restore_line_pointer (c
);
3041 demand_empty_rest_of_line ();
3043 #else /* ! TC_I960 */
3044 /* The MRI assembler seems to use different forms of .sect for
3045 different targets. */
3046 as_bad ("MRI mode not supported for this target");
3047 ignore_rest_of_line ();
3048 #endif /* ! TC_I960 */
3049 #endif /* ! TC_M68K */
3052 /* Handle the .print pseudo-op. */
3055 s_print (int ignore ATTRIBUTE_UNUSED
)
3060 s
= demand_copy_C_string (&len
);
3063 demand_empty_rest_of_line ();
3066 /* Handle the .purgem pseudo-op. */
3069 s_purgem (int ignore ATTRIBUTE_UNUSED
)
3071 if (is_it_end_of_statement ())
3073 demand_empty_rest_of_line ();
3083 c
= get_symbol_name (& name
);
3084 delete_macro (name
);
3085 *input_line_pointer
= c
;
3086 SKIP_WHITESPACE_AFTER_NAME ();
3088 while (*input_line_pointer
++ == ',');
3090 --input_line_pointer
;
3091 demand_empty_rest_of_line ();
3094 /* Handle the .endm/.endr pseudo-ops. */
3097 s_bad_end (int endr
)
3099 as_warn (_(".end%c encountered without preceding %s"),
3101 endr
? ".rept, .irp, or .irpc" : ".macro");
3102 demand_empty_rest_of_line ();
3105 /* Handle the .rept pseudo-op. */
3108 s_rept (int ignore ATTRIBUTE_UNUSED
)
3112 count
= get_absolute_expression ();
3114 do_repeat (count
, "REPT", "ENDR");
3117 /* This function provides a generic repeat block implementation. It allows
3118 different directives to be used as the start/end keys. */
3121 do_repeat (int count
, const char *start
, const char *end
)
3127 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
3129 as_bad (_("%s without %s"), start
, end
);
3133 sb_build (&many
, count
* one
.len
);
3135 sb_add_sb (&many
, &one
);
3139 input_scrub_include_sb (&many
, input_line_pointer
, 1);
3141 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3144 /* Like do_repeat except that any text matching EXPANDER in the
3145 block is replaced by the itteration count. */
3148 do_repeat_with_expander (int count
,
3151 const char * expander
)
3157 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
3159 as_bad (_("%s without %s"), start
, end
);
3165 if (expander
!= NULL
&& strstr (one
.ptr
, expander
) != NULL
)
3167 while (count
-- > 0)
3173 sb_build (& processed
, one
.len
);
3174 sb_add_sb (& processed
, & one
);
3175 sub
= strstr (processed
.ptr
, expander
);
3176 len
= sprintf (sub
, "%d", count
);
3177 gas_assert (len
< 8);
3178 strcpy (sub
+ len
, sub
+ 8);
3179 processed
.len
-= (8 - len
);
3180 sb_add_sb (& many
, & processed
);
3181 sb_kill (& processed
);
3186 sb_add_sb (&many
, &one
);
3190 input_scrub_include_sb (&many
, input_line_pointer
, 1);
3192 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3195 /* Skip to end of current repeat loop; EXTRA indicates how many additional
3196 input buffers to skip. Assumes that conditionals preceding the loop end
3197 are properly nested.
3199 This function makes it easier to implement a premature "break" out of the
3200 loop. The EXTRA arg accounts for other buffers we might have inserted,
3201 such as line substitutions. */
3204 end_repeat (int extra
)
3206 cond_exit_macro (macro_nest
);
3207 while (extra
-- >= 0)
3208 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3212 assign_symbol (char *name
, int mode
)
3216 if (name
[0] == '.' && name
[1] == '\0')
3218 /* Turn '. = mumble' into a .org mumble. */
3222 segment
= get_known_segmented_expression (&exp
);
3225 do_org (segment
, &exp
, 0);
3230 if ((symbolP
= symbol_find (name
)) == NULL
3231 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
3233 symbolP
= symbol_find_or_make (name
);
3235 /* When doing symbol listings, play games with dummy fragments living
3236 outside the normal fragment chain to record the file and line info
3238 if (listing
& LISTING_SYMBOLS
)
3240 extern struct list_info_struct
*listing_tail
;
3241 fragS
*dummy_frag
= (fragS
*) xcalloc (1, sizeof (fragS
));
3242 dummy_frag
->line
= listing_tail
;
3243 dummy_frag
->fr_symbol
= symbolP
;
3244 symbol_set_frag (symbolP
, dummy_frag
);
3247 #if defined (OBJ_COFF) && !defined (TE_PE)
3248 /* "set" symbols are local unless otherwise specified. */
3249 SF_SET_LOCAL (symbolP
);
3253 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3255 if ((mode
!= 0 || !S_IS_VOLATILE (symbolP
))
3256 && !S_CAN_BE_REDEFINED (symbolP
))
3258 as_bad (_("symbol `%s' is already defined"), name
);
3259 symbolP
= symbol_clone (symbolP
, 0);
3261 /* If the symbol is volatile, copy the symbol and replace the
3262 original with the copy, so that previous uses of the symbol will
3263 retain the value of the symbol at the point of use. */
3264 else if (S_IS_VOLATILE (symbolP
))
3265 symbolP
= symbol_clone (symbolP
, 1);
3269 S_SET_VOLATILE (symbolP
);
3271 S_SET_FORWARD_REF (symbolP
);
3273 pseudo_set (symbolP
);
3276 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3277 then this is .equiv, and it is an error if the symbol is already
3278 defined. If EQUIV is -1, the symbol additionally is a forward
3286 /* Especial apologies for the random logic:
3287 this just grew, and could be parsed much more simply!
3289 if ((name
= read_symbol_name ()) == NULL
)
3292 if (*input_line_pointer
!= ',')
3294 as_bad (_("expected comma after \"%s\""), name
);
3295 ignore_rest_of_line ();
3300 input_line_pointer
++;
3301 assign_symbol (name
, equiv
);
3302 demand_empty_rest_of_line ();
3316 #ifdef md_flush_pending_output
3317 md_flush_pending_output ();
3320 #ifdef md_cons_align
3325 stop
= mri_comment_field (&stopc
);
3327 /* In m68k MRI mode, we need to align to a word boundary, unless
3329 if (flag_m68k_mri
&& mult
> 1)
3331 if (now_seg
== absolute_section
)
3333 abs_section_offset
+= abs_section_offset
& 1;
3334 if (line_label
!= NULL
)
3335 S_SET_VALUE (line_label
, abs_section_offset
);
3337 else if (mri_common_symbol
!= NULL
)
3341 mri_val
= S_GET_VALUE (mri_common_symbol
);
3342 if ((mri_val
& 1) != 0)
3344 S_SET_VALUE (mri_common_symbol
, mri_val
+ 1);
3345 if (line_label
!= NULL
)
3347 expressionS
*symexp
;
3349 symexp
= symbol_get_value_expression (line_label
);
3350 know (symexp
->X_op
== O_symbol
);
3351 know (symexp
->X_add_symbol
== mri_common_symbol
);
3352 symexp
->X_add_number
+= 1;
3358 do_align (1, (char *) NULL
, 0, 0);
3359 if (line_label
!= NULL
)
3361 symbol_set_frag (line_label
, frag_now
);
3362 S_SET_VALUE (line_label
, frag_now_fix ());
3372 if (*input_line_pointer
== ',')
3374 ++input_line_pointer
;
3379 val
.X_op
= O_constant
;
3380 val
.X_add_number
= 0;
3383 if ((val
.X_op
!= O_constant
3384 || val
.X_add_number
< - 0x80
3385 || val
.X_add_number
> 0xff
3386 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
3387 && (now_seg
!= absolute_section
&& !in_bss ()))
3389 resolve_expression (&exp
);
3390 if (exp
.X_op
!= O_constant
)
3391 as_bad (_("unsupported variable size or fill value"));
3398 bytes
= mult
* exp
.X_add_number
;
3399 for (i
= 0; i
< exp
.X_add_number
; i
++)
3400 emit_expr (&val
, mult
);
3405 if (now_seg
== absolute_section
|| mri_common_symbol
!= NULL
)
3406 resolve_expression (&exp
);
3408 if (exp
.X_op
== O_constant
)
3412 repeat
= exp
.X_add_number
;
3419 as_warn (_(".space repeat count is zero, ignored"));
3420 else if (repeat
< 0)
3421 as_warn (_(".space repeat count is negative, ignored"));
3425 /* If we are in the absolute section, just bump the offset. */
3426 if (now_seg
== absolute_section
)
3428 if (val
.X_op
!= O_constant
|| val
.X_add_number
!= 0)
3429 as_warn (_("ignoring fill value in absolute section"));
3430 abs_section_offset
+= repeat
;
3434 /* If we are secretly in an MRI common section, then
3435 creating space just increases the size of the common
3437 if (mri_common_symbol
!= NULL
)
3439 S_SET_VALUE (mri_common_symbol
,
3440 S_GET_VALUE (mri_common_symbol
) + repeat
);
3445 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
3446 (offsetT
) repeat
, (char *) 0);
3450 if (now_seg
== absolute_section
)
3452 as_bad (_("space allocation too complex in absolute section"));
3453 subseg_set (text_section
, 0);
3456 if (mri_common_symbol
!= NULL
)
3458 as_bad (_("space allocation too complex in common section"));
3459 mri_common_symbol
= NULL
;
3463 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
3464 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
3467 if ((val
.X_op
!= O_constant
|| val
.X_add_number
!= 0) && in_bss ())
3468 as_warn (_("ignoring fill value in section `%s'"),
3469 segment_name (now_seg
));
3471 *p
= val
.X_add_number
;
3476 /* In MRI mode, after an odd number of bytes, we must align to an
3477 even word boundary, unless the next instruction is a dc.b, ds.b
3479 if (flag_mri
&& (bytes
& 1) != 0)
3480 mri_pending_align
= 1;
3482 demand_empty_rest_of_line ();
3485 mri_comment_end (stop
, stopc
);
3488 /* This is like s_space, but the value is a floating point number with
3489 the given precision. This is for the MRI dcb.s pseudo-op and
3493 s_float_space (int float_type
)
3497 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
3501 #ifdef md_cons_align
3506 stop
= mri_comment_field (&stopc
);
3508 count
= get_absolute_expression ();
3511 if (*input_line_pointer
!= ',')
3513 as_bad (_("missing value"));
3514 ignore_rest_of_line ();
3516 mri_comment_end (stop
, stopc
);
3520 ++input_line_pointer
;
3524 /* Skip any 0{letter} that may be present. Don't even check if the
3525 * letter is legal. */
3526 if (input_line_pointer
[0] == '0'
3527 && ISALPHA (input_line_pointer
[1]))
3528 input_line_pointer
+= 2;
3530 /* Accept :xxxx, where the x's are hex digits, for a floating point
3531 with the exact digits specified. */
3532 if (input_line_pointer
[0] == ':')
3534 flen
= hex_float (float_type
, temp
);
3537 ignore_rest_of_line ();
3539 mri_comment_end (stop
, stopc
);
3547 err
= md_atof (float_type
, temp
, &flen
);
3548 know (flen
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3549 know (err
!= NULL
|| flen
> 0);
3552 as_bad (_("bad floating literal: %s"), err
);
3553 ignore_rest_of_line ();
3555 mri_comment_end (stop
, stopc
);
3560 while (--count
>= 0)
3564 p
= frag_more (flen
);
3565 memcpy (p
, temp
, (unsigned int) flen
);
3568 demand_empty_rest_of_line ();
3571 mri_comment_end (stop
, stopc
);
3574 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3577 s_struct (int ignore ATTRIBUTE_UNUSED
)
3583 stop
= mri_comment_field (&stopc
);
3584 abs_section_offset
= get_absolute_expression ();
3585 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3586 /* The ELF backend needs to know that we are changing sections, so
3587 that .previous works correctly. */
3589 obj_elf_section_change_hook ();
3591 subseg_set (absolute_section
, 0);
3592 demand_empty_rest_of_line ();
3594 mri_comment_end (stop
, stopc
);
3598 s_text (int ignore ATTRIBUTE_UNUSED
)
3602 temp
= get_absolute_expression ();
3603 subseg_set (text_section
, (subsegT
) temp
);
3604 demand_empty_rest_of_line ();
3607 /* .weakref x, y sets x as an alias to y that, as long as y is not
3608 referenced directly, will cause y to become a weak symbol. */
3610 s_weakref (int ignore ATTRIBUTE_UNUSED
)
3617 if ((name
= read_symbol_name ()) == NULL
)
3620 symbolP
= symbol_find_or_make (name
);
3622 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3624 if (!S_IS_VOLATILE (symbolP
))
3626 as_bad (_("symbol `%s' is already defined"), name
);
3629 symbolP
= symbol_clone (symbolP
, 1);
3630 S_CLEAR_VOLATILE (symbolP
);
3635 if (*input_line_pointer
!= ',')
3637 as_bad (_("expected comma after \"%s\""), name
);
3641 input_line_pointer
++;
3646 if ((name
= read_symbol_name ()) == NULL
)
3649 if ((symbolP2
= symbol_find_noref (name
, 1)) == NULL
3650 && (symbolP2
= md_undefined_symbol (name
)) == NULL
)
3652 symbolP2
= symbol_find_or_make (name
);
3653 S_SET_WEAKREFD (symbolP2
);
3657 symbolS
*symp
= symbolP2
;
3659 while (S_IS_WEAKREFR (symp
) && symp
!= symbolP
)
3661 expressionS
*expP
= symbol_get_value_expression (symp
);
3663 gas_assert (expP
->X_op
== O_symbol
3664 && expP
->X_add_number
== 0);
3665 symp
= expP
->X_add_symbol
;
3667 if (symp
== symbolP
)
3671 loop
= concat (S_GET_NAME (symbolP
),
3672 " => ", S_GET_NAME (symbolP2
), (const char *) NULL
);
3675 while (symp
!= symbolP
)
3677 char *old_loop
= loop
;
3679 symp
= symbol_get_value_expression (symp
)->X_add_symbol
;
3680 loop
= concat (loop
, " => ", S_GET_NAME (symp
),
3681 (const char *) NULL
);
3685 as_bad (_("%s: would close weakref loop: %s"),
3686 S_GET_NAME (symbolP
), loop
);
3690 ignore_rest_of_line ();
3694 /* Short-circuiting instead of just checking here might speed
3695 things up a tiny little bit, but loop error messages would
3696 miss intermediate links. */
3697 /* symbolP2 = symp; */
3700 memset (&exp
, 0, sizeof (exp
));
3701 exp
.X_op
= O_symbol
;
3702 exp
.X_add_symbol
= symbolP2
;
3704 S_SET_SEGMENT (symbolP
, undefined_section
);
3705 symbol_set_value_expression (symbolP
, &exp
);
3706 symbol_set_frag (symbolP
, &zero_address_frag
);
3707 S_SET_WEAKREFR (symbolP
);
3709 demand_empty_rest_of_line ();
3714 ignore_rest_of_line ();
3720 /* Verify that we are at the end of a line. If not, issue an error and
3724 demand_empty_rest_of_line (void)
3727 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3728 input_line_pointer
++;
3731 if (ISPRINT (*input_line_pointer
))
3732 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3733 *input_line_pointer
);
3735 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3736 *input_line_pointer
);
3737 ignore_rest_of_line ();
3740 /* Return pointing just after end-of-line. */
3741 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3744 /* Silently advance to the end of line. Use this after already having
3745 issued an error about something bad. */
3748 ignore_rest_of_line (void)
3750 while (input_line_pointer
< buffer_limit
3751 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3752 input_line_pointer
++;
3754 input_line_pointer
++;
3756 /* Return pointing just after end-of-line. */
3757 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3760 /* Sets frag for given symbol to zero_address_frag, except when the
3761 symbol frag is already set to a dummy listing frag. */
3764 set_zero_frag (symbolS
*symbolP
)
3766 if (symbol_get_frag (symbolP
)->fr_type
!= rs_dummy
)
3767 symbol_set_frag (symbolP
, &zero_address_frag
);
3770 /* In: Pointer to a symbol.
3771 Input_line_pointer->expression.
3773 Out: Input_line_pointer->just after any whitespace after expression.
3774 Tried to set symbol to value of expression.
3775 Will change symbols type, value, and frag; */
3778 pseudo_set (symbolS
*symbolP
)
3783 know (symbolP
); /* NULL pointer is logic error. */
3785 if (!S_IS_FORWARD_REF (symbolP
))
3786 (void) expression (&exp
);
3788 (void) deferred_expression (&exp
);
3790 if (exp
.X_op
== O_illegal
)
3791 as_bad (_("illegal expression"));
3792 else if (exp
.X_op
== O_absent
)
3793 as_bad (_("missing expression"));
3794 else if (exp
.X_op
== O_big
)
3796 if (exp
.X_add_number
> 0)
3797 as_bad (_("bignum invalid"));
3799 as_bad (_("floating point number invalid"));
3801 else if (exp
.X_op
== O_subtract
3802 && !S_IS_FORWARD_REF (symbolP
)
3803 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
3804 && (symbol_get_frag (exp
.X_add_symbol
)
3805 == symbol_get_frag (exp
.X_op_symbol
)))
3807 exp
.X_op
= O_constant
;
3808 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
3809 - S_GET_VALUE (exp
.X_op_symbol
));
3812 if (symbol_section_p (symbolP
))
3814 as_bad ("attempt to set value of section symbol");
3823 exp
.X_add_number
= 0;
3826 S_SET_SEGMENT (symbolP
, absolute_section
);
3827 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3828 set_zero_frag (symbolP
);
3832 #ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
3833 if (S_IS_EXTERNAL (symbolP
))
3835 as_bad ("can't equate global symbol `%s' with register name",
3836 S_GET_NAME (symbolP
));
3840 S_SET_SEGMENT (symbolP
, reg_section
);
3841 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3842 set_zero_frag (symbolP
);
3843 symbol_get_value_expression (symbolP
)->X_op
= O_register
;
3847 seg
= S_GET_SEGMENT (exp
.X_add_symbol
);
3848 /* For x=undef+const, create an expression symbol.
3849 For x=x+const, just update x except when x is an undefined symbol
3850 For x=defined+const, evaluate x. */
3851 if (symbolP
== exp
.X_add_symbol
3852 && (seg
!= undefined_section
3853 || !symbol_constant_p (symbolP
)))
3855 *symbol_X_add_number (symbolP
) += exp
.X_add_number
;
3858 else if (!S_IS_FORWARD_REF (symbolP
) && seg
!= undefined_section
)
3860 symbolS
*s
= exp
.X_add_symbol
;
3862 if (S_IS_COMMON (s
))
3863 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3864 S_GET_NAME (symbolP
), S_GET_NAME (s
));
3866 S_SET_SEGMENT (symbolP
, seg
);
3867 S_SET_VALUE (symbolP
, exp
.X_add_number
+ S_GET_VALUE (s
));
3868 symbol_set_frag (symbolP
, symbol_get_frag (s
));
3869 copy_symbol_attributes (symbolP
, s
);
3872 S_SET_SEGMENT (symbolP
, undefined_section
);
3873 symbol_set_value_expression (symbolP
, &exp
);
3874 copy_symbol_attributes (symbolP
, exp
.X_add_symbol
);
3875 set_zero_frag (symbolP
);
3879 /* The value is some complex expression. */
3880 S_SET_SEGMENT (symbolP
, expr_section
);
3881 symbol_set_value_expression (symbolP
, &exp
);
3882 set_zero_frag (symbolP
);
3889 CONStruct more frag of .bytes, or .words etc.
3890 Should need_pass_2 be 1 then emit no frag(s).
3891 This understands EXPRESSIONS.
3895 This has a split personality. We use expression() to read the
3896 value. We can detect if the value won't fit in a byte or word.
3897 But we can't detect if expression() discarded significant digits
3898 in the case of a long. Not worth the crocks required to fix it. */
3900 /* Select a parser for cons expressions. */
3902 /* Some targets need to parse the expression in various fancy ways.
3903 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3904 (for example, the HPPA does this). Otherwise, you can define
3905 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3906 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3907 are defined, which is the normal case, then only simple expressions
3912 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
3915 #ifndef TC_PARSE_CONS_EXPRESSION
3916 #ifdef BITFIELD_CONS_EXPRESSIONS
3917 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3918 (parse_bitfield_cons (EXP, NBYTES), TC_PARSE_CONS_RETURN_NONE)
3920 parse_bitfield_cons (expressionS
*exp
, unsigned int nbytes
);
3922 #ifdef REPEAT_CONS_EXPRESSIONS
3923 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3924 (parse_repeat_cons (EXP, NBYTES), TC_PARSE_CONS_RETURN_NONE)
3926 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
3929 /* If we haven't gotten one yet, just call expression. */
3930 #ifndef TC_PARSE_CONS_EXPRESSION
3931 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3932 (expression (EXP), TC_PARSE_CONS_RETURN_NONE)
3937 do_parse_cons_expression (expressionS
*exp
,
3938 int nbytes ATTRIBUTE_UNUSED
)
3940 (void) TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3944 /* Worker to do .byte etc statements.
3945 Clobbers input_line_pointer and checks end-of-line. */
3948 cons_worker (int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
3956 #ifdef md_flush_pending_output
3957 md_flush_pending_output ();
3961 stop
= mri_comment_field (&stopc
);
3963 if (is_it_end_of_statement ())
3965 demand_empty_rest_of_line ();
3967 mri_comment_end (stop
, stopc
);
3971 #ifdef TC_ADDRESS_BYTES
3973 nbytes
= TC_ADDRESS_BYTES ();
3976 #ifdef md_cons_align
3977 md_cons_align (nbytes
);
3983 TC_PARSE_CONS_RETURN_TYPE ret
= TC_PARSE_CONS_RETURN_NONE
;
3984 #ifdef TC_CONS_FIX_CHECK
3985 fixS
**cur_fix
= &frchain_now
->fix_tail
;
3987 if (*cur_fix
!= NULL
)
3988 cur_fix
= &(*cur_fix
)->fx_next
;
3993 parse_mri_cons (&exp
, (unsigned int) nbytes
);
3998 if (*input_line_pointer
== '"')
4000 as_bad (_("unexpected `\"' in expression"));
4001 ignore_rest_of_line ();
4005 ret
= TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
4010 if (exp
.X_op
== O_symbol
)
4011 exp
.X_op
= O_symbol_rva
;
4013 as_fatal (_("rva without symbol"));
4015 emit_expr_with_reloc (&exp
, (unsigned int) nbytes
, ret
);
4016 #ifdef TC_CONS_FIX_CHECK
4017 TC_CONS_FIX_CHECK (&exp
, nbytes
, *cur_fix
);
4021 while (*input_line_pointer
++ == ',');
4023 /* In MRI mode, after an odd number of bytes, we must align to an
4024 even word boundary, unless the next instruction is a dc.b, ds.b
4026 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
4027 mri_pending_align
= 1;
4029 input_line_pointer
--; /* Put terminator back into stream. */
4031 demand_empty_rest_of_line ();
4034 mri_comment_end (stop
, stopc
);
4040 cons_worker (size
, 0);
4046 cons_worker (size
, 1);
4049 /* .reloc offset, reloc_name, symbol+addend. */
4052 s_reloc (int ignore ATTRIBUTE_UNUSED
)
4059 struct reloc_list
*reloc
;
4060 struct _bfd_rel
{ const char * name
; bfd_reloc_code_real_type code
; };
4061 static struct _bfd_rel bfd_relocs
[] =
4063 { "NONE", BFD_RELOC_NONE
},
4064 { "8", BFD_RELOC_8
},
4065 { "16", BFD_RELOC_16
},
4066 { "32", BFD_RELOC_32
},
4067 { "64", BFD_RELOC_64
}
4070 reloc
= (struct reloc_list
*) xmalloc (sizeof (*reloc
));
4073 stop
= mri_comment_field (&stopc
);
4082 as_bad (_("missing or bad offset expression"));
4085 exp
.X_add_symbol
= section_symbol (now_seg
);
4086 exp
.X_op
= O_symbol
;
4089 if (exp
.X_add_number
== 0)
4091 reloc
->u
.a
.offset_sym
= exp
.X_add_symbol
;
4096 reloc
->u
.a
.offset_sym
= make_expr_symbol (&exp
);
4101 if (*input_line_pointer
!= ',')
4103 as_bad (_("missing reloc type"));
4107 ++input_line_pointer
;
4109 c
= get_symbol_name (& r_name
);
4110 if (strncasecmp (r_name
, "BFD_RELOC_", 10) == 0)
4114 for (reloc
->u
.a
.howto
= NULL
, i
= 0; i
< ARRAY_SIZE (bfd_relocs
); i
++)
4115 if (strcasecmp (r_name
+ 10, bfd_relocs
[i
].name
) == 0)
4117 reloc
->u
.a
.howto
= bfd_reloc_type_lookup (stdoutput
,
4118 bfd_relocs
[i
].code
);
4123 reloc
->u
.a
.howto
= bfd_reloc_name_lookup (stdoutput
, r_name
);
4124 *input_line_pointer
= c
;
4125 if (reloc
->u
.a
.howto
== NULL
)
4127 as_bad (_("unrecognized reloc type"));
4131 exp
.X_op
= O_absent
;
4132 SKIP_WHITESPACE_AFTER_NAME ();
4133 if (*input_line_pointer
== ',')
4135 ++input_line_pointer
;
4143 as_bad (_("bad reloc expression"));
4145 ignore_rest_of_line ();
4148 mri_comment_end (stop
, stopc
);
4151 reloc
->u
.a
.sym
= NULL
;
4152 reloc
->u
.a
.addend
= 0;
4155 reloc
->u
.a
.sym
= NULL
;
4156 reloc
->u
.a
.addend
= exp
.X_add_number
;
4159 reloc
->u
.a
.sym
= exp
.X_add_symbol
;
4160 reloc
->u
.a
.addend
= exp
.X_add_number
;
4163 reloc
->u
.a
.sym
= make_expr_symbol (&exp
);
4164 reloc
->u
.a
.addend
= 0;
4168 reloc
->file
= as_where (&reloc
->line
);
4169 reloc
->next
= reloc_list
;
4172 demand_empty_rest_of_line ();
4174 mri_comment_end (stop
, stopc
);
4177 /* Put the contents of expression EXP into the object file using
4178 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
4181 emit_expr (expressionS
*exp
, unsigned int nbytes
)
4183 emit_expr_with_reloc (exp
, nbytes
, TC_PARSE_CONS_RETURN_NONE
);
4187 emit_expr_with_reloc (expressionS
*exp
,
4188 unsigned int nbytes
,
4189 TC_PARSE_CONS_RETURN_TYPE reloc
)
4193 valueT extra_digit
= 0;
4195 /* Don't do anything if we are going to make another pass. */
4200 dot_value
= frag_now_fix ();
4201 dot_frag
= frag_now
;
4205 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
4206 appear as a four byte positive constant in the .line section,
4207 followed by a 2 byte 0xffff. Look for that case here. */
4209 static int dwarf_line
= -1;
4211 if (strcmp (segment_name (now_seg
), ".line") != 0)
4213 else if (dwarf_line
>= 0
4215 && exp
->X_op
== O_constant
4216 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
4217 listing_source_line ((unsigned int) dwarf_line
);
4218 else if (nbytes
== 4
4219 && exp
->X_op
== O_constant
4220 && exp
->X_add_number
>= 0)
4221 dwarf_line
= exp
->X_add_number
;
4226 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
4227 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
4228 AT_sibling (0x12) followed by a four byte address of the sibling
4229 followed by a 2 byte AT_name (0x38) followed by the name of the
4230 file. We look for that case here. */
4232 static int dwarf_file
= 0;
4234 if (strcmp (segment_name (now_seg
), ".debug") != 0)
4236 else if (dwarf_file
== 0
4238 && exp
->X_op
== O_constant
4239 && exp
->X_add_number
== 0x11)
4241 else if (dwarf_file
== 1
4243 && exp
->X_op
== O_constant
4244 && exp
->X_add_number
== 0x12)
4246 else if (dwarf_file
== 2
4249 else if (dwarf_file
== 3
4251 && exp
->X_op
== O_constant
4252 && exp
->X_add_number
== 0x38)
4257 /* The variable dwarf_file_string tells stringer that the string
4258 may be the name of the source file. */
4259 if (dwarf_file
== 4)
4260 dwarf_file_string
= 1;
4262 dwarf_file_string
= 0;
4267 if (check_eh_frame (exp
, &nbytes
))
4272 /* Handle a negative bignum. */
4274 && exp
->X_add_number
== 0
4275 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
4276 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
4279 unsigned long carry
;
4281 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
4283 /* Negate the bignum: one's complement each digit and add 1. */
4285 for (i
= 0; i
< exp
->X_add_number
; i
++)
4289 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
4292 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
4293 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
4296 /* We can ignore any carry out, because it will be handled by
4297 extra_digit if it is needed. */
4299 extra_digit
= (valueT
) -1;
4303 if (op
== O_absent
|| op
== O_illegal
)
4305 as_warn (_("zero assumed for missing expression"));
4306 exp
->X_add_number
= 0;
4309 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4311 as_bad (_("floating point number invalid"));
4312 exp
->X_add_number
= 0;
4315 else if (op
== O_register
)
4317 as_warn (_("register value used as expression"));
4321 /* Allow `.word 0' in the absolute section. */
4322 if (now_seg
== absolute_section
)
4324 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
4325 as_bad (_("attempt to store value in absolute section"));
4326 abs_section_offset
+= nbytes
;
4330 /* Allow `.word 0' in BSS style sections. */
4331 if ((op
!= O_constant
|| exp
->X_add_number
!= 0) && in_bss ())
4332 as_bad (_("attempt to store non-zero value in section `%s'"),
4333 segment_name (now_seg
));
4335 p
= frag_more ((int) nbytes
);
4337 if (reloc
!= TC_PARSE_CONS_RETURN_NONE
)
4339 emit_expr_fix (exp
, nbytes
, frag_now
, p
, reloc
);
4343 #ifndef WORKING_DOT_WORD
4344 /* If we have the difference of two symbols in a word, save it on
4345 the broken_words list. See the code in write.c. */
4346 if (op
== O_subtract
&& nbytes
== 2)
4348 struct broken_word
*x
;
4350 x
= (struct broken_word
*) xmalloc (sizeof (struct broken_word
));
4351 x
->next_broken_word
= broken_words
;
4354 x
->subseg
= now_subseg
;
4356 x
->word_goes_here
= p
;
4358 x
->add
= exp
->X_add_symbol
;
4359 x
->sub
= exp
->X_op_symbol
;
4360 x
->addnum
= exp
->X_add_number
;
4368 /* If we have an integer, but the number of bytes is too large to
4369 pass to md_number_to_chars, handle it as a bignum. */
4370 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
4372 extra_digit
= exp
->X_unsigned
? 0 : -1;
4373 convert_to_bignum (exp
, !exp
->X_unsigned
);
4377 if (op
== O_constant
)
4385 /* JF << of >= number of bits in the object is undefined. In
4386 particular SPARC (Sun 4) has problems. */
4387 if (nbytes
>= sizeof (valueT
))
4390 if (nbytes
> sizeof (valueT
))
4393 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
4397 /* Don't store these bits. */
4398 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
4399 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
4402 unmask
= ~mask
; /* Do store these bits. */
4405 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
4406 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
4409 get
= exp
->X_add_number
;
4411 if ((get
& mask
) != 0
4412 && ((get
& mask
) != mask
4413 || (get
& hibit
) == 0))
4415 /* Leading bits contain both 0s & 1s. */
4416 #if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG
4418 as_warn (_("value 0x%llx truncated to 0x%llx"),
4419 (unsigned long long) get
, (unsigned long long) use
);
4421 as_warn (_("value 0x%I64x truncated to 0x%I64x"),
4422 (unsigned long long) get
, (unsigned long long) use
);
4425 as_warn (_("value 0x%lx truncated to 0x%lx"),
4426 (unsigned long) get
, (unsigned long) use
);
4429 /* Put bytes in right order. */
4430 md_number_to_chars (p
, use
, (int) nbytes
);
4432 else if (op
== O_big
)
4435 LITTLENUM_TYPE
*nums
;
4437 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
4440 int i
= nbytes
/ CHARS_PER_LITTLENUM
;
4444 LITTLENUM_TYPE sign
= 0;
4445 if ((generic_bignum
[--i
]
4446 & (1 << (LITTLENUM_NUMBER_OF_BITS
- 1))) != 0)
4447 sign
= ~(LITTLENUM_TYPE
) 0;
4449 while (++i
< exp
->X_add_number
)
4450 if (generic_bignum
[i
] != sign
)
4453 else if (nbytes
== 1)
4455 /* We have nbytes == 1 and CHARS_PER_LITTLENUM == 2 (probably).
4456 Check that bits 8.. of generic_bignum[0] match bit 7
4457 and that they match all of generic_bignum[1..exp->X_add_number]. */
4458 LITTLENUM_TYPE sign
= (generic_bignum
[0] & (1 << 7)) ? -1 : 0;
4459 LITTLENUM_TYPE himask
= LITTLENUM_MASK
& ~ 0xFF;
4461 if ((generic_bignum
[0] & himask
) == (sign
& himask
))
4463 while (++i
< exp
->X_add_number
)
4464 if (generic_bignum
[i
] != sign
)
4469 if (i
< exp
->X_add_number
)
4470 as_warn (_("bignum truncated to %d bytes"), nbytes
);
4476 md_number_to_chars (p
, (valueT
) generic_bignum
[0], 1);
4479 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
4481 if (target_big_endian
)
4483 while (nbytes
> size
)
4485 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4486 nbytes
-= CHARS_PER_LITTLENUM
;
4487 p
+= CHARS_PER_LITTLENUM
;
4490 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
4491 while (size
>= CHARS_PER_LITTLENUM
)
4494 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4495 size
-= CHARS_PER_LITTLENUM
;
4496 p
+= CHARS_PER_LITTLENUM
;
4501 nums
= generic_bignum
;
4502 while (size
>= CHARS_PER_LITTLENUM
)
4504 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4506 size
-= CHARS_PER_LITTLENUM
;
4507 p
+= CHARS_PER_LITTLENUM
;
4508 nbytes
-= CHARS_PER_LITTLENUM
;
4511 while (nbytes
>= CHARS_PER_LITTLENUM
)
4513 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4514 nbytes
-= CHARS_PER_LITTLENUM
;
4515 p
+= CHARS_PER_LITTLENUM
;
4520 emit_expr_fix (exp
, nbytes
, frag_now
, p
, TC_PARSE_CONS_RETURN_NONE
);
4524 emit_expr_fix (expressionS
*exp
, unsigned int nbytes
, fragS
*frag
, char *p
,
4525 TC_PARSE_CONS_RETURN_TYPE r ATTRIBUTE_UNUSED
)
4528 unsigned int size
= nbytes
;
4530 memset (p
, 0, size
);
4532 /* Generate a fixS to record the symbol value. */
4534 #ifdef TC_CONS_FIX_NEW
4535 TC_CONS_FIX_NEW (frag
, p
- frag
->fr_literal
+ offset
, size
, exp
, r
);
4537 if (r
!= TC_PARSE_CONS_RETURN_NONE
)
4539 reloc_howto_type
*reloc_howto
;
4541 reloc_howto
= bfd_reloc_type_lookup (stdoutput
, r
);
4542 size
= bfd_get_reloc_size (reloc_howto
);
4546 as_bad (_("%s relocations do not fit in %u bytes\n"),
4547 reloc_howto
->name
, nbytes
);
4550 else if (target_big_endian
)
4551 offset
= nbytes
- size
;
4572 as_bad (_("unsupported BFD relocation size %u"), size
);
4575 fix_new_exp (frag
, p
- frag
->fr_literal
+ offset
, size
,
4580 #ifdef BITFIELD_CONS_EXPRESSIONS
4582 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
4583 w:x,y:z, where w and y are bitwidths and x and y are values. They
4584 then pack them all together. We do a little better in that we allow
4585 them in words, longs, etc. and we'll pack them in target byte order
4588 The rules are: pack least significant bit first, if a field doesn't
4589 entirely fit, put it in the next unit. Overflowing the bitfield is
4590 explicitly *not* even a warning. The bitwidth should be considered
4593 To use this function the tc-XXX.h file should define
4594 BITFIELD_CONS_EXPRESSIONS. */
4597 parse_bitfield_cons (exp
, nbytes
)
4599 unsigned int nbytes
;
4601 unsigned int bits_available
= BITS_PER_CHAR
* nbytes
;
4602 char *hold
= input_line_pointer
;
4604 (void) expression (exp
);
4606 if (*input_line_pointer
== ':')
4613 unsigned long width
;
4615 if (*input_line_pointer
!= ':')
4617 input_line_pointer
= hold
;
4619 } /* Next piece is not a bitfield. */
4621 /* In the general case, we can't allow
4622 full expressions with symbol
4623 differences and such. The relocation
4624 entries for symbols not defined in this
4625 assembly would require arbitrary field
4626 widths, positions, and masks which most
4627 of our current object formats don't
4630 In the specific case where a symbol
4631 *is* defined in this assembly, we
4632 *could* build fixups and track it, but
4633 this could lead to confusion for the
4634 backends. I'm lazy. I'll take any
4635 SEG_ABSOLUTE. I think that means that
4636 you can use a previous .set or
4637 .equ type symbol. xoxorich. */
4639 if (exp
->X_op
== O_absent
)
4641 as_warn (_("using a bit field width of zero"));
4642 exp
->X_add_number
= 0;
4643 exp
->X_op
= O_constant
;
4644 } /* Implied zero width bitfield. */
4646 if (exp
->X_op
!= O_constant
)
4648 *input_line_pointer
= '\0';
4649 as_bad (_("field width \"%s\" too complex for a bitfield"), hold
);
4650 *input_line_pointer
= ':';
4651 demand_empty_rest_of_line ();
4653 } /* Too complex. */
4655 if ((width
= exp
->X_add_number
) > (BITS_PER_CHAR
* nbytes
))
4657 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4658 width
, nbytes
, (BITS_PER_CHAR
* nbytes
));
4659 width
= BITS_PER_CHAR
* nbytes
;
4662 if (width
> bits_available
)
4664 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4665 input_line_pointer
= hold
;
4666 exp
->X_add_number
= value
;
4671 hold
= ++input_line_pointer
;
4673 (void) expression (exp
);
4674 if (exp
->X_op
!= O_constant
)
4676 char cache
= *input_line_pointer
;
4678 *input_line_pointer
= '\0';
4679 as_bad (_("field value \"%s\" too complex for a bitfield"), hold
);
4680 *input_line_pointer
= cache
;
4681 demand_empty_rest_of_line ();
4683 } /* Too complex. */
4685 value
|= ((~(-(1 << width
)) & exp
->X_add_number
)
4686 << ((BITS_PER_CHAR
* nbytes
) - bits_available
));
4688 if ((bits_available
-= width
) == 0
4689 || is_it_end_of_statement ()
4690 || *input_line_pointer
!= ',')
4693 } /* All the bitfields we're gonna get. */
4695 hold
= ++input_line_pointer
;
4696 (void) expression (exp
);
4699 exp
->X_add_number
= value
;
4700 exp
->X_op
= O_constant
;
4701 exp
->X_unsigned
= 1;
4702 exp
->X_extrabit
= 0;
4706 #endif /* BITFIELD_CONS_EXPRESSIONS */
4708 /* Handle an MRI style string expression. */
4712 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
)
4714 if (*input_line_pointer
!= '\''
4715 && (input_line_pointer
[1] != '\''
4716 || (*input_line_pointer
!= 'A'
4717 && *input_line_pointer
!= 'E')))
4718 (void) TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
4722 unsigned int result
= 0;
4724 /* An MRI style string. Cut into as many bytes as will fit into
4725 a nbyte chunk, left justify if necessary, and separate with
4726 commas so we can try again later. */
4727 if (*input_line_pointer
== 'A')
4728 ++input_line_pointer
;
4729 else if (*input_line_pointer
== 'E')
4731 as_bad (_("EBCDIC constants are not supported"));
4732 ++input_line_pointer
;
4735 input_line_pointer
++;
4736 for (scan
= 0; scan
< nbytes
; scan
++)
4738 if (*input_line_pointer
== '\'')
4740 if (input_line_pointer
[1] == '\'')
4742 input_line_pointer
++;
4747 result
= (result
<< 8) | (*input_line_pointer
++);
4751 while (scan
< nbytes
)
4757 /* Create correct expression. */
4758 exp
->X_op
= O_constant
;
4759 exp
->X_add_number
= result
;
4761 /* Fake it so that we can read the next char too. */
4762 if (input_line_pointer
[0] != '\'' ||
4763 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
4765 input_line_pointer
-= 2;
4766 input_line_pointer
[0] = ',';
4767 input_line_pointer
[1] = '\'';
4770 input_line_pointer
++;
4773 #endif /* TC_M68K */
4775 #ifdef REPEAT_CONS_EXPRESSIONS
4777 /* Parse a repeat expression for cons. This is used by the MIPS
4778 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4779 object file COUNT times.
4781 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4784 parse_repeat_cons (exp
, nbytes
)
4786 unsigned int nbytes
;
4793 if (*input_line_pointer
!= ':')
4795 /* No repeat count. */
4799 ++input_line_pointer
;
4800 expression (&count
);
4801 if (count
.X_op
!= O_constant
4802 || count
.X_add_number
<= 0)
4804 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4808 /* The cons function is going to output this expression once. So we
4809 output it count - 1 times. */
4810 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
4811 emit_expr (exp
, nbytes
);
4814 #endif /* REPEAT_CONS_EXPRESSIONS */
4816 /* Parse a floating point number represented as a hex constant. This
4817 permits users to specify the exact bits they want in the floating
4821 hex_float (int float_type
, char *bytes
)
4853 as_bad (_("unknown floating type type '%c'"), float_type
);
4857 /* It would be nice if we could go through expression to parse the
4858 hex constant, but if we get a bignum it's a pain to sort it into
4859 the buffer correctly. */
4861 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4865 /* The MRI assembler accepts arbitrary underscores strewn about
4866 through the hex constant, so we ignore them as well. */
4867 if (*input_line_pointer
== '_')
4869 ++input_line_pointer
;
4875 as_warn (_("floating point constant too large"));
4878 d
= hex_value (*input_line_pointer
) << 4;
4879 ++input_line_pointer
;
4880 while (*input_line_pointer
== '_')
4881 ++input_line_pointer
;
4882 if (hex_p (*input_line_pointer
))
4884 d
+= hex_value (*input_line_pointer
);
4885 ++input_line_pointer
;
4887 if (target_big_endian
)
4890 bytes
[length
- i
- 1] = d
;
4896 if (target_big_endian
)
4897 memset (bytes
+ i
, 0, length
- i
);
4899 memset (bytes
, 0, length
- i
);
4907 CONStruct some more frag chars of .floats .ffloats etc.
4908 Makes 0 or more new frags.
4909 If need_pass_2 == 1, no frags are emitted.
4910 This understands only floating literals, not expressions. Sorry.
4912 A floating constant is defined by atof_generic(), except it is preceded
4913 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4914 reading, I decided to be incompatible. This always tries to give you
4915 rounded bits to the precision of the pseudo-op. Former AS did premature
4916 truncation, restored noisy bits instead of trailing 0s AND gave you
4917 a choice of 2 flavours of noise according to which of 2 floating-point
4918 scanners you directed AS to use.
4920 In: input_line_pointer->whitespace before, or '0' of flonum. */
4923 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4924 int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4927 int length
; /* Number of chars in an object. */
4928 char *err
; /* Error from scanning floating literal. */
4929 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4931 if (is_it_end_of_statement ())
4933 demand_empty_rest_of_line ();
4937 if (now_seg
== absolute_section
)
4939 as_bad (_("attempt to store float in absolute section"));
4940 ignore_rest_of_line ();
4946 as_bad (_("attempt to store float in section `%s'"),
4947 segment_name (now_seg
));
4948 ignore_rest_of_line ();
4952 #ifdef md_flush_pending_output
4953 md_flush_pending_output ();
4956 #ifdef md_cons_align
4962 /* input_line_pointer->1st char of a flonum (we hope!). */
4965 /* Skip any 0{letter} that may be present. Don't even check if the
4966 letter is legal. Someone may invent a "z" format and this routine
4967 has no use for such information. Lusers beware: you get
4968 diagnostics if your input is ill-conditioned. */
4969 if (input_line_pointer
[0] == '0'
4970 && ISALPHA (input_line_pointer
[1]))
4971 input_line_pointer
+= 2;
4973 /* Accept :xxxx, where the x's are hex digits, for a floating
4974 point with the exact digits specified. */
4975 if (input_line_pointer
[0] == ':')
4977 ++input_line_pointer
;
4978 length
= hex_float (float_type
, temp
);
4981 ignore_rest_of_line ();
4987 err
= md_atof (float_type
, temp
, &length
);
4988 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
4989 know (err
!= NULL
|| length
> 0);
4992 as_bad (_("bad floating literal: %s"), err
);
4993 ignore_rest_of_line ();
5004 #ifdef REPEAT_CONS_EXPRESSIONS
5005 if (*input_line_pointer
== ':')
5007 expressionS count_exp
;
5009 ++input_line_pointer
;
5010 expression (&count_exp
);
5012 if (count_exp
.X_op
!= O_constant
5013 || count_exp
.X_add_number
<= 0)
5014 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
5016 count
= count_exp
.X_add_number
;
5020 while (--count
>= 0)
5022 p
= frag_more (length
);
5023 memcpy (p
, temp
, (unsigned int) length
);
5028 while (*input_line_pointer
++ == ',');
5030 /* Put terminator back into stream. */
5031 --input_line_pointer
;
5032 demand_empty_rest_of_line ();
5037 Note - we are using the DWARF standard's definition of LEB128 encoding
5038 where each 7-bit value is a stored in a byte, *not* an octet. This
5039 means that on targets where a byte contains multiple octets there is
5040 a *huge waste of space*. (This also means that we do not have to
5041 have special versions of these functions for when OCTETS_PER_BYTE_POWER
5044 If the 7-bit values were to be packed into N-bit bytes (where N > 8)
5045 we would then have to consider whether multiple, successive LEB128
5046 values should be packed into the bytes without padding (bad idea) or
5047 whether each LEB128 number is padded out to a whole number of bytes.
5048 Plus you have to decide on the endianness of packing octets into a
5051 /* Return the size of a LEB128 value in bytes. */
5053 static inline unsigned int
5054 sizeof_sleb128 (offsetT value
)
5061 byte
= (value
& 0x7f);
5062 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
5063 Fortunately, we can structure things so that the extra work reduces
5064 to a noop on systems that do things "properly". */
5065 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
5068 while (!(((value
== 0) && ((byte
& 0x40) == 0))
5069 || ((value
== -1) && ((byte
& 0x40) != 0))));
5074 static inline unsigned int
5075 sizeof_uleb128 (valueT value
)
5090 sizeof_leb128 (valueT value
, int sign
)
5093 return sizeof_sleb128 ((offsetT
) value
);
5095 return sizeof_uleb128 (value
);
5098 /* Output a LEB128 value. Returns the number of bytes used. */
5100 static inline unsigned int
5101 output_sleb128 (char *p
, offsetT value
)
5108 unsigned byte
= (value
& 0x7f);
5110 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
5111 Fortunately, we can structure things so that the extra work reduces
5112 to a noop on systems that do things "properly". */
5113 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
5115 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
5116 || ((value
== -1) && ((byte
& 0x40) != 0))));
5127 static inline unsigned int
5128 output_uleb128 (char *p
, valueT value
)
5134 unsigned byte
= (value
& 0x7f);
5138 /* More bytes to follow. */
5149 output_leb128 (char *p
, valueT value
, int sign
)
5152 return output_sleb128 (p
, (offsetT
) value
);
5154 return output_uleb128 (p
, value
);
5157 /* Do the same for bignums. We combine sizeof with output here in that
5158 we don't output for NULL values of P. It isn't really as critical as
5159 for "normal" values that this be streamlined. Returns the number of
5162 static inline unsigned int
5163 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
)
5170 /* Strip leading sign extensions off the bignum. */
5172 && bignum
[size
- 1] == LITTLENUM_MASK
5173 && bignum
[size
- 2] > LITTLENUM_MASK
/ 2)
5178 /* OR in the next part of the littlenum. */
5179 val
|= (*bignum
<< loaded
);
5180 loaded
+= LITTLENUM_NUMBER_OF_BITS
;
5184 /* Add bytes until there are less than 7 bits left in VAL
5185 or until every non-sign bit has been written. */
5192 || val
!= ((byte
& 0x40) == 0 ? 0 : ((valueT
) 1 << loaded
) - 1))
5199 while ((byte
& 0x80) != 0 && loaded
>= 7);
5203 /* Mop up any left-over bits (of which there will be less than 7). */
5204 if ((byte
& 0x80) != 0)
5206 /* Sign-extend VAL. */
5207 if (val
& (1 << (loaded
- 1)))
5208 val
|= ~0U << loaded
;
5217 static inline unsigned int
5218 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
)
5225 /* Strip leading zeros off the bignum. */
5226 /* XXX: Is this needed? */
5227 while (size
> 0 && bignum
[size
- 1] == 0)
5232 if (loaded
< 7 && size
> 0)
5234 val
|= (*bignum
<< loaded
);
5235 loaded
+= 8 * CHARS_PER_LITTLENUM
;
5244 if (size
> 0 || val
)
5251 while (byte
& 0x80);
5257 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
, int sign
)
5260 return output_big_sleb128 (p
, bignum
, size
);
5262 return output_big_uleb128 (p
, bignum
, size
);
5265 /* Generate the appropriate fragments for a given expression to emit a
5266 leb128 value. SIGN is 1 for sleb, 0 for uleb. */
5269 emit_leb128_expr (expressionS
*exp
, int sign
)
5271 operatorT op
= exp
->X_op
;
5272 unsigned int nbytes
;
5274 if (op
== O_absent
|| op
== O_illegal
)
5276 as_warn (_("zero assumed for missing expression"));
5277 exp
->X_add_number
= 0;
5280 else if (op
== O_big
&& exp
->X_add_number
<= 0)
5282 as_bad (_("floating point number invalid"));
5283 exp
->X_add_number
= 0;
5286 else if (op
== O_register
)
5288 as_warn (_("register value used as expression"));
5291 else if (op
== O_constant
5293 && (exp
->X_add_number
< 0) == !exp
->X_extrabit
)
5295 /* We're outputting a signed leb128 and the sign of X_add_number
5296 doesn't reflect the sign of the original value. Convert EXP
5297 to a correctly-extended bignum instead. */
5298 convert_to_bignum (exp
, exp
->X_extrabit
);
5302 if (now_seg
== absolute_section
)
5304 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
5305 as_bad (_("attempt to store value in absolute section"));
5306 abs_section_offset
++;
5310 if ((op
!= O_constant
|| exp
->X_add_number
!= 0) && in_bss ())
5311 as_bad (_("attempt to store non-zero value in section `%s'"),
5312 segment_name (now_seg
));
5314 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
5315 a signal that this is leb128 data. It shouldn't optimize this away. */
5316 nbytes
= (unsigned int) -1;
5317 if (check_eh_frame (exp
, &nbytes
))
5320 /* Let the backend know that subsequent data may be byte aligned. */
5321 #ifdef md_cons_align
5325 if (op
== O_constant
)
5327 /* If we've got a constant, emit the thing directly right now. */
5329 valueT value
= exp
->X_add_number
;
5333 size
= sizeof_leb128 (value
, sign
);
5334 p
= frag_more (size
);
5335 if (output_leb128 (p
, value
, sign
) > size
)
5338 else if (op
== O_big
)
5340 /* O_big is a different sort of constant. */
5345 size
= output_big_leb128 (NULL
, generic_bignum
, exp
->X_add_number
, sign
);
5346 p
= frag_more (size
);
5347 if (output_big_leb128 (p
, generic_bignum
, exp
->X_add_number
, sign
) > size
)
5352 /* Otherwise, we have to create a variable sized fragment and
5353 resolve things later. */
5355 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
5356 make_expr_symbol (exp
), 0, (char *) NULL
);
5360 /* Parse the .sleb128 and .uleb128 pseudos. */
5367 #ifdef md_flush_pending_output
5368 md_flush_pending_output ();
5374 emit_leb128_expr (&exp
, sign
);
5376 while (*input_line_pointer
++ == ',');
5378 input_line_pointer
--;
5379 demand_empty_rest_of_line ();
5383 stringer_append_char (int c
, int bitsize
)
5386 as_bad (_("attempt to store non-empty string in section `%s'"),
5387 segment_name (now_seg
));
5389 if (!target_big_endian
)
5390 FRAG_APPEND_1_CHAR (c
);
5395 FRAG_APPEND_1_CHAR (0);
5396 FRAG_APPEND_1_CHAR (0);
5397 FRAG_APPEND_1_CHAR (0);
5398 FRAG_APPEND_1_CHAR (0);
5401 FRAG_APPEND_1_CHAR (0);
5402 FRAG_APPEND_1_CHAR (0);
5405 FRAG_APPEND_1_CHAR (0);
5410 /* Called with invalid bitsize argument. */
5414 if (target_big_endian
)
5415 FRAG_APPEND_1_CHAR (c
);
5418 /* Worker to do .ascii etc statements.
5419 Reads 0 or more ',' separated, double-quoted strings.
5420 Caller should have checked need_pass_2 is FALSE because we don't
5422 Checks for end-of-line.
5423 BITS_APPENDZERO says how many bits are in a target char.
5424 The bottom bit is set if a NUL char should be appended to the strings. */
5427 stringer (int bits_appendzero
)
5429 const int bitsize
= bits_appendzero
& ~7;
5430 const int append_zero
= bits_appendzero
& 1;
5432 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5436 #ifdef md_flush_pending_output
5437 md_flush_pending_output ();
5440 #ifdef md_cons_align
5444 /* If we have been switched into the abs_section then we
5445 will not have an obstack onto which we can hang strings. */
5446 if (now_seg
== absolute_section
)
5448 as_bad (_("strings must be placed into a section"));
5449 ignore_rest_of_line ();
5453 /* The following awkward logic is to parse ZERO or more strings,
5454 comma separated. Recall a string expression includes spaces
5455 before the opening '\"' and spaces after the closing '\"'.
5456 We fake a leading ',' if there is (supposed to be)
5457 a 1st, expression. We keep demanding expressions for each ','. */
5458 if (is_it_end_of_statement ())
5460 c
= 0; /* Skip loop. */
5461 ++input_line_pointer
; /* Compensate for end of loop. */
5465 c
= ','; /* Do loop. */
5468 while (c
== ',' || c
== '<' || c
== '"')
5471 switch (*input_line_pointer
)
5474 ++input_line_pointer
; /*->1st char of string. */
5475 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5476 start
= input_line_pointer
;
5479 while (is_a_char (c
= next_char_of_string ()))
5480 stringer_append_char (c
, bitsize
);
5483 stringer_append_char (0, bitsize
);
5485 know (input_line_pointer
[-1] == '\"');
5487 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5488 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
5489 will emit .string with a filename in the .debug section
5490 after a sequence of constants. See the comment in
5491 emit_expr for the sequence. emit_expr will set
5492 dwarf_file_string to non-zero if this string might be a
5493 source file name. */
5494 if (strcmp (segment_name (now_seg
), ".debug") != 0)
5495 dwarf_file_string
= 0;
5496 else if (dwarf_file_string
)
5498 c
= input_line_pointer
[-1];
5499 input_line_pointer
[-1] = '\0';
5500 listing_source_file (start
);
5501 input_line_pointer
[-1] = c
;
5507 input_line_pointer
++;
5508 c
= get_single_number ();
5509 stringer_append_char (c
, bitsize
);
5510 if (*input_line_pointer
!= '>')
5511 as_bad (_("expected <nn>"));
5513 input_line_pointer
++;
5516 input_line_pointer
++;
5520 c
= *input_line_pointer
;
5523 demand_empty_rest_of_line ();
5526 /* FIXME-SOMEDAY: I had trouble here on characters with the
5527 high bits set. We'll probably also have trouble with
5528 multibyte chars, wide chars, etc. Also be careful about
5529 returning values bigger than 1 byte. xoxorich. */
5532 next_char_of_string (void)
5536 c
= *input_line_pointer
++ & CHAR_MASK
;
5544 as_warn (_("unterminated string; newline inserted"));
5545 bump_line_counters ();
5548 #ifndef NO_STRING_ESCAPES
5550 switch (c
= *input_line_pointer
++ & CHAR_MASK
)
5578 break; /* As itself. */
5594 for (i
= 0, number
= 0;
5595 ISDIGIT (c
) && i
< 3;
5596 c
= *input_line_pointer
++, i
++)
5598 number
= number
* 8 + c
- '0';
5601 c
= number
& CHAR_MASK
;
5603 --input_line_pointer
;
5612 c
= *input_line_pointer
++;
5613 while (ISXDIGIT (c
))
5616 number
= number
* 16 + c
- '0';
5617 else if (ISUPPER (c
))
5618 number
= number
* 16 + c
- 'A' + 10;
5620 number
= number
* 16 + c
- 'a' + 10;
5621 c
= *input_line_pointer
++;
5623 c
= number
& CHAR_MASK
;
5624 --input_line_pointer
;
5629 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
5630 as_warn (_("unterminated string; newline inserted"));
5632 bump_line_counters ();
5637 #ifdef ONLY_STANDARD_ESCAPES
5638 as_bad (_("bad escaped character in string"));
5640 #endif /* ONLY_STANDARD_ESCAPES */
5645 #endif /* ! defined (NO_STRING_ESCAPES) */
5654 get_segmented_expression (expressionS
*expP
)
5658 retval
= expression (expP
);
5659 if (expP
->X_op
== O_illegal
5660 || expP
->X_op
== O_absent
5661 || expP
->X_op
== O_big
)
5663 as_bad (_("expected address expression"));
5664 expP
->X_op
= O_constant
;
5665 expP
->X_add_number
= 0;
5666 retval
= absolute_section
;
5672 get_known_segmented_expression (expressionS
*expP
)
5674 segT retval
= get_segmented_expression (expP
);
5676 if (retval
== undefined_section
)
5678 /* There is no easy way to extract the undefined symbol from the
5680 if (expP
->X_add_symbol
!= NULL
5681 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
5682 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5683 S_GET_NAME (expP
->X_add_symbol
));
5685 as_warn (_("some symbol undefined; zero assumed"));
5686 retval
= absolute_section
;
5687 expP
->X_op
= O_constant
;
5688 expP
->X_add_number
= 0;
5693 char /* Return terminator. */
5694 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
5696 /* FIXME: val_pointer should probably be offsetT *. */
5697 *val_pointer
= (long) get_absolute_expression ();
5698 return (*input_line_pointer
++);
5701 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
5702 Give a warning if that happens. */
5705 demand_copy_C_string (int *len_pointer
)
5709 if ((s
= demand_copy_string (len_pointer
)) != 0)
5713 for (len
= *len_pointer
; len
> 0; len
--)
5720 as_bad (_("this string may not contain \'\\0\'"));
5728 /* Demand string, but return a safe (=private) copy of the string.
5729 Return NULL if we can't read a string here. */
5732 demand_copy_string (int *lenP
)
5740 if (*input_line_pointer
== '\"')
5742 input_line_pointer
++; /* Skip opening quote. */
5744 while (is_a_char (c
= next_char_of_string ()))
5746 obstack_1grow (¬es
, c
);
5749 /* JF this next line is so demand_copy_C_string will return a
5750 null terminated string. */
5751 obstack_1grow (¬es
, '\0');
5752 retval
= (char *) obstack_finish (¬es
);
5756 as_bad (_("missing string"));
5758 ignore_rest_of_line ();
5764 /* In: Input_line_pointer->next character.
5766 Do: Skip input_line_pointer over all whitespace.
5768 Out: 1 if input_line_pointer->end-of-line. */
5771 is_it_end_of_statement (void)
5774 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
5778 equals (char *sym_name
, int reassign
)
5783 input_line_pointer
++;
5784 if (*input_line_pointer
== '=')
5785 input_line_pointer
++;
5786 if (reassign
< 0 && *input_line_pointer
== '=')
5787 input_line_pointer
++;
5789 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
5790 input_line_pointer
++;
5793 stop
= mri_comment_field (&stopc
);
5795 assign_symbol (sym_name
, reassign
>= 0 ? !reassign
: reassign
);
5799 demand_empty_rest_of_line ();
5800 mri_comment_end (stop
, stopc
);
5804 /* .incbin -- include a file verbatim at the current location. */
5807 s_incbin (int x ATTRIBUTE_UNUSED
)
5818 #ifdef md_flush_pending_output
5819 md_flush_pending_output ();
5822 #ifdef md_cons_align
5827 filename
= demand_copy_string (& len
);
5828 if (filename
== NULL
)
5833 /* Look for optional skip and count. */
5834 if (* input_line_pointer
== ',')
5836 ++ input_line_pointer
;
5837 skip
= get_absolute_expression ();
5841 if (* input_line_pointer
== ',')
5843 ++ input_line_pointer
;
5845 count
= get_absolute_expression ();
5847 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
5853 demand_empty_rest_of_line ();
5855 /* Try opening absolute path first, then try include dirs. */
5856 binfile
= fopen (filename
, FOPEN_RB
);
5857 if (binfile
== NULL
)
5861 path
= (char *) xmalloc ((unsigned long) len
+ include_dir_maxlen
+ 5);
5863 for (i
= 0; i
< include_dir_count
; i
++)
5865 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
5867 binfile
= fopen (path
, FOPEN_RB
);
5868 if (binfile
!= NULL
)
5872 if (binfile
== NULL
)
5873 as_bad (_("file not found: %s"), filename
);
5876 path
= xstrdup (filename
);
5882 register_dependency (path
);
5884 /* Compute the length of the file. */
5885 if (fseek (binfile
, 0, SEEK_END
) != 0)
5887 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
5890 file_len
= ftell (binfile
);
5892 /* If a count was not specified use the remainder of the file. */
5894 count
= file_len
- skip
;
5896 if (skip
< 0 || count
< 0 || file_len
< 0 || skip
+ count
> file_len
)
5898 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5899 skip
, count
, file_len
);
5903 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
5905 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
5909 /* Allocate frag space and store file contents in it. */
5910 binfrag
= frag_more (count
);
5912 bytes
= fread (binfrag
, 1, count
, binfile
);
5914 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5915 path
, bytes
, count
);
5918 if (binfile
!= NULL
)
5924 /* .include -- include a file at this point. */
5927 s_include (int arg ATTRIBUTE_UNUSED
)
5936 filename
= demand_copy_string (&i
);
5937 if (filename
== NULL
)
5939 /* demand_copy_string has already printed an error and
5940 called ignore_rest_of_line. */
5948 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
5949 && *input_line_pointer
!= ' '
5950 && *input_line_pointer
!= '\t')
5952 obstack_1grow (¬es
, *input_line_pointer
);
5953 ++input_line_pointer
;
5957 obstack_1grow (¬es
, '\0');
5958 filename
= (char *) obstack_finish (¬es
);
5959 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5960 ++input_line_pointer
;
5963 demand_empty_rest_of_line ();
5964 path
= (char *) xmalloc ((unsigned long) i
5965 + include_dir_maxlen
+ 5 /* slop */ );
5967 for (i
= 0; i
< include_dir_count
; i
++)
5969 strcpy (path
, include_dirs
[i
]);
5971 strcat (path
, filename
);
5972 if (0 != (try_file
= fopen (path
, FOPEN_RT
)))
5982 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5983 register_dependency (path
);
5984 input_scrub_insert_file (path
);
5988 add_include_dir (char *path
)
5992 if (include_dir_count
== 0)
5994 include_dirs
= XNEWVEC (const char *, 2);
5995 include_dirs
[0] = "."; /* Current dir. */
5996 include_dir_count
= 2;
6000 include_dir_count
++;
6001 include_dirs
= XRESIZEVEC (const char *, include_dirs
,
6005 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
6008 if (i
> include_dir_maxlen
)
6009 include_dir_maxlen
= i
;
6012 /* Output debugging information to denote the source file. */
6015 generate_file_debug (void)
6017 if (debug_type
== DEBUG_STABS
)
6018 stabs_generate_asm_file ();
6021 /* Output line number debugging information for the current source line. */
6024 generate_lineno_debug (void)
6028 case DEBUG_UNSPECIFIED
:
6033 stabs_generate_asm_lineno ();
6036 ecoff_generate_asm_lineno ();
6039 /* ??? We could here indicate to dwarf2dbg.c that something
6040 has changed. However, since there is additional backend
6041 support that is required (calling dwarf2_emit_insn), we
6042 let dwarf2dbg.c call as_where on its own. */
6047 /* Output debugging information to mark a function entry point or end point.
6048 END_P is zero for .func, and non-zero for .endfunc. */
6053 do_s_func (end_p
, NULL
);
6056 /* Subroutine of s_func so targets can choose a different default prefix.
6057 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
6060 do_s_func (int end_p
, const char *default_prefix
)
6062 /* Record the current function so that we can issue an error message for
6063 misplaced .func,.endfunc, and also so that .endfunc needs no
6065 static char *current_name
;
6066 static char *current_label
;
6070 if (current_name
== NULL
)
6072 as_bad (_("missing .func"));
6073 ignore_rest_of_line ();
6077 if (debug_type
== DEBUG_STABS
)
6078 stabs_generate_asm_endfunc (current_name
, current_label
);
6080 current_name
= current_label
= NULL
;
6085 char delim1
, delim2
;
6087 if (current_name
!= NULL
)
6089 as_bad (_(".endfunc missing for previous .func"));
6090 ignore_rest_of_line ();
6094 delim1
= get_symbol_name (& name
);
6095 name
= xstrdup (name
);
6096 *input_line_pointer
= delim1
;
6097 SKIP_WHITESPACE_AFTER_NAME ();
6098 if (*input_line_pointer
!= ',')
6102 if (asprintf (&label
, "%s%s", default_prefix
, name
) == -1)
6103 as_fatal ("%s", xstrerror (errno
));
6107 char leading_char
= bfd_get_symbol_leading_char (stdoutput
);
6108 /* Missing entry point, use function's name with the leading
6112 if (asprintf (&label
, "%c%s", leading_char
, name
) == -1)
6113 as_fatal ("%s", xstrerror (errno
));
6121 ++input_line_pointer
;
6123 delim2
= get_symbol_name (& label
);
6124 label
= xstrdup (label
);
6125 restore_line_pointer (delim2
);
6128 if (debug_type
== DEBUG_STABS
)
6129 stabs_generate_asm_func (name
, label
);
6131 current_name
= name
;
6132 current_label
= label
;
6135 demand_empty_rest_of_line ();
6138 #ifdef HANDLE_BUNDLE
6141 s_bundle_align_mode (int arg ATTRIBUTE_UNUSED
)
6143 unsigned int align
= get_absolute_expression ();
6145 demand_empty_rest_of_line ();
6147 if (align
> (unsigned int) TC_ALIGN_LIMIT
)
6148 as_fatal (_(".bundle_align_mode alignment too large (maximum %u)"),
6149 (unsigned int) TC_ALIGN_LIMIT
);
6151 if (bundle_lock_frag
!= NULL
)
6153 as_bad (_("cannot change .bundle_align_mode inside .bundle_lock"));
6157 bundle_align_p2
= align
;
6161 s_bundle_lock (int arg ATTRIBUTE_UNUSED
)
6163 demand_empty_rest_of_line ();
6165 if (bundle_align_p2
== 0)
6167 as_bad (_(".bundle_lock is meaningless without .bundle_align_mode"));
6171 if (bundle_lock_depth
== 0)
6173 bundle_lock_frchain
= frchain_now
;
6174 bundle_lock_frag
= start_bundle ();
6176 ++bundle_lock_depth
;
6180 s_bundle_unlock (int arg ATTRIBUTE_UNUSED
)
6184 demand_empty_rest_of_line ();
6186 if (bundle_lock_frag
== NULL
)
6188 as_bad (_(".bundle_unlock without preceding .bundle_lock"));
6192 gas_assert (bundle_align_p2
> 0);
6194 gas_assert (bundle_lock_depth
> 0);
6195 if (--bundle_lock_depth
> 0)
6198 size
= pending_bundle_size (bundle_lock_frag
);
6200 if (size
> (1U << bundle_align_p2
))
6201 as_bad (_(".bundle_lock sequence is %u bytes, but bundle size only %u"),
6202 size
, 1 << bundle_align_p2
);
6204 finish_bundle (bundle_lock_frag
, size
);
6206 bundle_lock_frag
= NULL
;
6207 bundle_lock_frchain
= NULL
;
6210 #endif /* HANDLE_BUNDLE */
6213 s_ignore (int arg ATTRIBUTE_UNUSED
)
6215 ignore_rest_of_line ();
6219 read_print_statistics (FILE *file
)
6221 hash_print_statistics (file
, "pseudo-op table", po_hash
);
6224 /* Inserts the given line into the input stream.
6226 This call avoids macro/conditionals nesting checking, since the contents of
6227 the line are assumed to replace the contents of a line already scanned.
6229 An appropriate use of this function would be substitution of input lines when
6230 called by md_start_line_hook(). The given line is assumed to already be
6231 properly scrubbed. */
6234 input_scrub_insert_line (const char *line
)
6237 size_t len
= strlen (line
);
6238 sb_build (&newline
, len
);
6239 sb_add_buffer (&newline
, line
, len
);
6240 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
6242 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
6245 /* Insert a file into the input stream; the path must resolve to an actual
6246 file; no include path searching or dependency registering is performed. */
6249 input_scrub_insert_file (char *path
)
6251 input_scrub_include_file (path
, input_line_pointer
);
6252 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
6255 /* Find the end of a line, considering quotation and escaping of quotes. */
6257 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
6258 # define TC_SINGLE_QUOTE_STRINGS 1
6262 _find_end_of_line (char *s
, int mri_string
, int insn ATTRIBUTE_UNUSED
,
6265 char inquote
= '\0';
6268 while (!is_end_of_line
[(unsigned char) *s
]
6269 || (inquote
&& !ISCNTRL (*s
))
6270 || (inquote
== '\'' && flag_mri
)
6271 #ifdef TC_EOL_IN_INSN
6272 || (insn
&& TC_EOL_IN_INSN (s
))
6274 /* PR 6926: When we are parsing the body of a macro the sequence
6275 \@ is special - it refers to the invocation count. If the @
6276 character happens to be registered as a line-separator character
6277 by the target, then the is_end_of_line[] test above will have
6278 returned true, but we need to ignore the line separating
6279 semantics in this particular case. */
6280 || (in_macro
&& inescape
&& *s
== '@')
6283 if (mri_string
&& *s
== '\'')
6287 else if (*s
== '\\')
6291 #ifdef TC_SINGLE_QUOTE_STRINGS
6292 || (TC_SINGLE_QUOTE_STRINGS
&& *s
== '\'')
6299 as_warn (_("missing closing `%c'"), inquote
);
6300 if (inescape
&& !ignore_input ())
6301 as_warn (_("stray `\\'"));
6306 find_end_of_line (char *s
, int mri_string
)
6308 return _find_end_of_line (s
, mri_string
, 0, 0);