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. */
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 (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. */
2357 as_where (&file
, &line
);
2359 eol
= find_end_of_line (input_line_pointer
, 0);
2360 sb_build (&s
, eol
- input_line_pointer
);
2361 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2362 input_line_pointer
= eol
;
2366 err
= expand_irp (irpc
, 0, &s
, &out
, get_non_macro_line_sb
);
2368 as_bad_where (file
, line
, "%s", err
);
2372 input_scrub_include_sb (&out
, input_line_pointer
, 1);
2374 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2377 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2378 the section to only be linked once. However, this is not supported
2379 by most object file formats. This takes an optional argument,
2380 which is what to do about duplicates. */
2383 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
2385 enum linkonce_type type
;
2389 type
= LINKONCE_DISCARD
;
2391 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
2396 c
= get_symbol_name (& s
);
2397 if (strcasecmp (s
, "discard") == 0)
2398 type
= LINKONCE_DISCARD
;
2399 else if (strcasecmp (s
, "one_only") == 0)
2400 type
= LINKONCE_ONE_ONLY
;
2401 else if (strcasecmp (s
, "same_size") == 0)
2402 type
= LINKONCE_SAME_SIZE
;
2403 else if (strcasecmp (s
, "same_contents") == 0)
2404 type
= LINKONCE_SAME_CONTENTS
;
2406 as_warn (_("unrecognized .linkonce type `%s'"), s
);
2408 (void) restore_line_pointer (c
);
2411 #ifdef obj_handle_link_once
2412 obj_handle_link_once (type
);
2413 #else /* ! defined (obj_handle_link_once) */
2417 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
2418 as_warn (_(".linkonce is not supported for this object file format"));
2420 flags
= bfd_get_section_flags (stdoutput
, now_seg
);
2421 flags
|= SEC_LINK_ONCE
;
2426 case LINKONCE_DISCARD
:
2427 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
2429 case LINKONCE_ONE_ONLY
:
2430 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
2432 case LINKONCE_SAME_SIZE
:
2433 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
2435 case LINKONCE_SAME_CONTENTS
:
2436 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
2439 if (!bfd_set_section_flags (stdoutput
, now_seg
, flags
))
2440 as_bad (_("bfd_set_section_flags: %s"),
2441 bfd_errmsg (bfd_get_error ()));
2443 #endif /* ! defined (obj_handle_link_once) */
2445 demand_empty_rest_of_line ();
2449 bss_alloc (symbolS
*symbolP
, addressT size
, unsigned int align
)
2452 segT current_seg
= now_seg
;
2453 subsegT current_subseg
= now_subseg
;
2454 segT bss_seg
= bss_section
;
2456 #if defined (TC_MIPS) || defined (TC_ALPHA)
2457 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
2458 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
2460 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2461 if (size
<= bfd_get_gp_size (stdoutput
))
2463 bss_seg
= subseg_new (".sbss", 1);
2464 seg_info (bss_seg
)->bss
= 1;
2465 if (!bfd_set_section_flags (stdoutput
, bss_seg
, SEC_ALLOC
))
2466 as_warn (_("error setting flags for \".sbss\": %s"),
2467 bfd_errmsg (bfd_get_error ()));
2471 subseg_set (bss_seg
, 1);
2473 if (align
> OCTETS_PER_BYTE_POWER
)
2475 record_alignment (bss_seg
, align
);
2476 frag_align (align
, 0, 0);
2479 /* Detach from old frag. */
2480 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2481 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2483 symbol_set_frag (symbolP
, frag_now
);
2484 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
, NULL
);
2488 S_SET_SIZE (symbolP
, size
);
2490 S_SET_SEGMENT (symbolP
, bss_seg
);
2493 /* The symbol may already have been created with a preceding
2494 ".globl" directive -- be careful not to step on storage class
2495 in that case. Otherwise, set it to static. */
2496 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2497 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2498 #endif /* OBJ_COFF */
2500 subseg_set (current_seg
, current_subseg
);
2504 parse_align (int align_bytes
)
2510 if (*input_line_pointer
!= ',')
2513 as_bad (_("expected alignment after size"));
2514 ignore_rest_of_line ();
2518 input_line_pointer
++;
2521 align
= get_absolute_expr (&exp
);
2522 if (exp
.X_op
== O_absent
)
2525 if (!exp
.X_unsigned
)
2527 as_warn (_("alignment negative; 0 assumed"));
2531 if (align_bytes
&& align
!= 0)
2533 /* convert to a power of 2 alignment */
2534 unsigned int alignp2
= 0;
2535 while ((align
& 1) == 0)
2536 align
>>= 1, ++alignp2
;
2539 as_bad (_("alignment not a power of 2"));
2540 ignore_rest_of_line ();
2548 /* Called from s_comm_internal after symbol name and size have been
2549 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2550 1 if this was a ".bss" directive which has a 3rd argument
2551 (alignment as a power of 2), or 2 if this was a ".bss" directive
2552 with alignment in bytes. */
2555 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2561 align
= parse_align (needs_align
- 1);
2562 if (align
== (addressT
) -1)
2566 /* Assume some objects may require alignment on some systems. */
2567 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2569 bss_alloc (symbolP
, size
, align
);
2574 s_lcomm (int needs_align
)
2576 s_comm_internal (needs_align
, s_lcomm_internal
);
2580 s_lcomm_bytes (int needs_align
)
2582 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2586 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2592 /* We permit ANY defined expression: BSD4.2 demands constants. */
2593 if ((name
= read_symbol_name ()) == NULL
)
2596 if (*input_line_pointer
!= ',')
2598 as_bad (_("expected comma after \"%s\""), name
);
2602 input_line_pointer
++;
2603 expression_and_evaluate (&exp
);
2605 if (exp
.X_op
!= O_constant
2606 && exp
.X_op
!= O_register
)
2608 as_bad (_("bad expression"));
2612 symbolP
= symbol_find_or_make (name
);
2614 if (S_GET_SEGMENT (symbolP
) == undefined_section
)
2616 /* The name might be an undefined .global symbol; be sure to
2617 keep the "external" bit. */
2618 S_SET_SEGMENT (symbolP
,
2619 (exp
.X_op
== O_constant
2622 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2626 as_bad (_("symbol `%s' is already defined"), name
);
2629 demand_empty_rest_of_line ();
2634 ignore_rest_of_line ();
2639 /* Read a line into an sb. Returns the character that ended the line
2640 or zero if there are no more lines. */
2643 get_line_sb (sb
*line
, int in_macro
)
2647 if (input_line_pointer
[-1] == '\n')
2648 bump_line_counters ();
2650 if (input_line_pointer
>= buffer_limit
)
2652 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2653 if (buffer_limit
== 0)
2657 eol
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 0, in_macro
);
2658 sb_add_buffer (line
, input_line_pointer
, eol
- input_line_pointer
);
2659 input_line_pointer
= eol
;
2661 /* Don't skip multiple end-of-line characters, because that breaks support
2662 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2663 characters but isn't. Instead just skip one end of line character and
2664 return the character skipped so that the caller can re-insert it if
2666 return *input_line_pointer
++;
2670 get_non_macro_line_sb (sb
*line
)
2672 return get_line_sb (line
, 0);
2676 get_macro_line_sb (sb
*line
)
2678 return get_line_sb (line
, 1);
2681 /* Define a macro. This is an interface to macro.c. */
2684 s_macro (int ignore ATTRIBUTE_UNUSED
)
2692 as_where (&file
, &line
);
2694 eol
= find_end_of_line (input_line_pointer
, 0);
2695 sb_build (&s
, eol
- input_line_pointer
);
2696 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2697 input_line_pointer
= eol
;
2699 if (line_label
!= NULL
)
2704 name
= S_GET_NAME (line_label
);
2705 len
= strlen (name
);
2706 sb_build (&label
, len
);
2707 sb_add_buffer (&label
, name
, len
);
2708 err
= define_macro (0, &s
, &label
, get_macro_line_sb
, file
, line
, &name
);
2712 err
= define_macro (0, &s
, NULL
, get_macro_line_sb
, file
, line
, &name
);
2714 as_bad_where (file
, line
, err
, name
);
2717 if (line_label
!= NULL
)
2719 S_SET_SEGMENT (line_label
, absolute_section
);
2720 S_SET_VALUE (line_label
, 0);
2721 symbol_set_frag (line_label
, &zero_address_frag
);
2724 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2725 && hash_find (po_hash
, name
) != NULL
)
2728 && hash_find (po_hash
, name
+ 1) != NULL
))
2729 as_warn_where (file
,
2731 _("attempt to redefine pseudo-op `%s' ignored"),
2738 /* Handle the .mexit pseudo-op, which immediately exits a macro
2742 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2746 cond_exit_macro (macro_nest
);
2747 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2750 as_warn (_("ignoring macro exit outside a macro definition."));
2753 /* Switch in and out of MRI mode. */
2756 s_mri (int ignore ATTRIBUTE_UNUSED
)
2759 #ifdef MRI_MODE_CHANGE
2763 on
= get_absolute_expression ();
2764 #ifdef MRI_MODE_CHANGE
2765 old_flag
= flag_mri
;
2784 /* Operator precedence changes in m68k MRI mode, so we need to
2785 update the operator rankings. */
2786 expr_set_precedence ();
2788 #ifdef MRI_MODE_CHANGE
2790 MRI_MODE_CHANGE (on
);
2793 demand_empty_rest_of_line ();
2796 /* Handle changing the location counter. */
2799 do_org (segT segment
, expressionS
*exp
, int fill
)
2801 if (segment
!= now_seg
2802 && segment
!= absolute_section
2803 && segment
!= expr_section
)
2804 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2806 if (now_seg
== absolute_section
)
2809 as_warn (_("ignoring fill value in absolute section"));
2810 if (exp
->X_op
!= O_constant
)
2812 as_bad (_("only constant offsets supported in absolute section"));
2813 exp
->X_add_number
= 0;
2815 abs_section_offset
= exp
->X_add_number
;
2820 symbolS
*sym
= exp
->X_add_symbol
;
2821 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2823 if (fill
&& in_bss ())
2824 as_warn (_("ignoring fill value in section `%s'"),
2825 segment_name (now_seg
));
2827 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2829 /* Handle complex expressions. */
2830 sym
= make_expr_symbol (exp
);
2834 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2840 s_org (int ignore ATTRIBUTE_UNUSED
)
2846 #ifdef md_flush_pending_output
2847 md_flush_pending_output ();
2850 /* The m68k MRI assembler has a different meaning for .org. It
2851 means to create an absolute section at a given address. We can't
2852 support that--use a linker script instead. */
2855 as_bad (_("MRI style ORG pseudo-op not supported"));
2856 ignore_rest_of_line ();
2860 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2861 thing as a sub-segment-relative origin. Any absolute origin is
2862 given a warning, then assumed to be segment-relative. Any
2863 segmented origin expression ("foo+42") had better be in the right
2864 segment or the .org is ignored.
2866 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2867 we never know sub-segment sizes when we are reading code. BSD
2868 will crash trying to emit negative numbers of filler bytes in
2869 certain .orgs. We don't crash, but see as-write for that code.
2871 Don't make frag if need_pass_2==1. */
2872 segment
= get_known_segmented_expression (&exp
);
2873 if (*input_line_pointer
== ',')
2875 input_line_pointer
++;
2876 temp_fill
= get_absolute_expression ();
2882 do_org (segment
, &exp
, temp_fill
);
2884 demand_empty_rest_of_line ();
2887 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2888 called by the obj-format routine which handles section changing
2889 when in MRI mode. It will create a new section, and return it. It
2890 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2891 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2894 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2904 name
= input_line_pointer
;
2905 if (!ISDIGIT (*name
))
2906 c
= get_symbol_name (& name
);
2911 ++input_line_pointer
;
2913 while (ISDIGIT (*input_line_pointer
));
2915 c
= *input_line_pointer
;
2916 *input_line_pointer
= '\0';
2919 name
= xstrdup (name
);
2921 c
= restore_line_pointer (c
);
2923 seg
= subseg_new (name
, 0);
2929 ++input_line_pointer
;
2930 align
= get_absolute_expression ();
2931 record_alignment (seg
, align
);
2935 if (*input_line_pointer
== ',')
2937 c
= *++input_line_pointer
;
2939 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
2942 as_bad (_("unrecognized section type"));
2943 ++input_line_pointer
;
2948 flags
= SEC_NO_FLAGS
;
2950 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
2951 else if (*type
== 'D' || *type
== 'M')
2952 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
2953 else if (*type
== 'R')
2954 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
2955 if (flags
!= SEC_NO_FLAGS
)
2957 if (!bfd_set_section_flags (stdoutput
, seg
, flags
))
2958 as_warn (_("error setting flags for \"%s\": %s"),
2959 bfd_section_name (stdoutput
, seg
),
2960 bfd_errmsg (bfd_get_error ()));
2965 /* Ignore the HP type. */
2966 if (*input_line_pointer
== ',')
2967 input_line_pointer
+= 2;
2969 demand_empty_rest_of_line ();
2971 #else /* ! TC_M68K */
2980 c
= get_symbol_name (& name
);
2982 name
= xstrdup (name
);
2984 c
= restore_line_pointer (c
);
2986 seg
= subseg_new (name
, 0);
2994 ++input_line_pointer
;
2996 c
= get_symbol_name (& sectype
);
2997 if (*sectype
== '\0')
2999 else if (strcasecmp (sectype
, "text") == 0)
3001 else if (strcasecmp (sectype
, "data") == 0)
3003 else if (strcasecmp (sectype
, "romdata") == 0)
3006 as_warn (_("unrecognized section type `%s'"), sectype
);
3007 (void) restore_line_pointer (c
);
3010 if (*input_line_pointer
== ',')
3014 ++input_line_pointer
;
3016 c
= get_symbol_name (& seccmd
);
3017 if (strcasecmp (seccmd
, "absolute") == 0)
3019 as_bad (_("absolute sections are not supported"));
3020 *input_line_pointer
= c
;
3021 ignore_rest_of_line ();
3024 else if (strcasecmp (seccmd
, "align") == 0)
3028 (void) restore_line_pointer (c
);
3029 align
= get_absolute_expression ();
3030 record_alignment (seg
, align
);
3034 as_warn (_("unrecognized section command `%s'"), seccmd
);
3035 (void) restore_line_pointer (c
);
3039 demand_empty_rest_of_line ();
3041 #else /* ! TC_I960 */
3042 /* The MRI assembler seems to use different forms of .sect for
3043 different targets. */
3044 as_bad ("MRI mode not supported for this target");
3045 ignore_rest_of_line ();
3046 #endif /* ! TC_I960 */
3047 #endif /* ! TC_M68K */
3050 /* Handle the .print pseudo-op. */
3053 s_print (int ignore ATTRIBUTE_UNUSED
)
3058 s
= demand_copy_C_string (&len
);
3061 demand_empty_rest_of_line ();
3064 /* Handle the .purgem pseudo-op. */
3067 s_purgem (int ignore ATTRIBUTE_UNUSED
)
3069 if (is_it_end_of_statement ())
3071 demand_empty_rest_of_line ();
3081 c
= get_symbol_name (& name
);
3082 delete_macro (name
);
3083 *input_line_pointer
= c
;
3084 SKIP_WHITESPACE_AFTER_NAME ();
3086 while (*input_line_pointer
++ == ',');
3088 --input_line_pointer
;
3089 demand_empty_rest_of_line ();
3092 /* Handle the .endm/.endr pseudo-ops. */
3095 s_bad_end (int endr
)
3097 as_warn (_(".end%c encountered without preceding %s"),
3099 endr
? ".rept, .irp, or .irpc" : ".macro");
3100 demand_empty_rest_of_line ();
3103 /* Handle the .rept pseudo-op. */
3106 s_rept (int ignore ATTRIBUTE_UNUSED
)
3110 count
= get_absolute_expression ();
3112 do_repeat (count
, "REPT", "ENDR");
3115 /* This function provides a generic repeat block implementation. It allows
3116 different directives to be used as the start/end keys. */
3119 do_repeat (int count
, const char *start
, const char *end
)
3125 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
3127 as_bad (_("%s without %s"), start
, end
);
3131 sb_build (&many
, count
* one
.len
);
3133 sb_add_sb (&many
, &one
);
3137 input_scrub_include_sb (&many
, input_line_pointer
, 1);
3139 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3142 /* Like do_repeat except that any text matching EXPANDER in the
3143 block is replaced by the itteration count. */
3146 do_repeat_with_expander (int count
,
3149 const char * expander
)
3155 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
3157 as_bad (_("%s without %s"), start
, end
);
3163 if (expander
!= NULL
&& strstr (one
.ptr
, expander
) != NULL
)
3165 while (count
-- > 0)
3171 sb_build (& processed
, one
.len
);
3172 sb_add_sb (& processed
, & one
);
3173 sub
= strstr (processed
.ptr
, expander
);
3174 len
= sprintf (sub
, "%d", count
);
3175 gas_assert (len
< 8);
3176 strcpy (sub
+ len
, sub
+ 8);
3177 processed
.len
-= (8 - len
);
3178 sb_add_sb (& many
, & processed
);
3179 sb_kill (& processed
);
3184 sb_add_sb (&many
, &one
);
3188 input_scrub_include_sb (&many
, input_line_pointer
, 1);
3190 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3193 /* Skip to end of current repeat loop; EXTRA indicates how many additional
3194 input buffers to skip. Assumes that conditionals preceding the loop end
3195 are properly nested.
3197 This function makes it easier to implement a premature "break" out of the
3198 loop. The EXTRA arg accounts for other buffers we might have inserted,
3199 such as line substitutions. */
3202 end_repeat (int extra
)
3204 cond_exit_macro (macro_nest
);
3205 while (extra
-- >= 0)
3206 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3210 assign_symbol (char *name
, int mode
)
3214 if (name
[0] == '.' && name
[1] == '\0')
3216 /* Turn '. = mumble' into a .org mumble. */
3220 segment
= get_known_segmented_expression (&exp
);
3223 do_org (segment
, &exp
, 0);
3228 if ((symbolP
= symbol_find (name
)) == NULL
3229 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
3231 symbolP
= symbol_find_or_make (name
);
3233 /* When doing symbol listings, play games with dummy fragments living
3234 outside the normal fragment chain to record the file and line info
3236 if (listing
& LISTING_SYMBOLS
)
3238 extern struct list_info_struct
*listing_tail
;
3239 fragS
*dummy_frag
= (fragS
*) xcalloc (1, sizeof (fragS
));
3240 dummy_frag
->line
= listing_tail
;
3241 dummy_frag
->fr_symbol
= symbolP
;
3242 symbol_set_frag (symbolP
, dummy_frag
);
3245 #if defined (OBJ_COFF) && !defined (TE_PE)
3246 /* "set" symbols are local unless otherwise specified. */
3247 SF_SET_LOCAL (symbolP
);
3251 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3253 if ((mode
!= 0 || !S_IS_VOLATILE (symbolP
))
3254 && !S_CAN_BE_REDEFINED (symbolP
))
3256 as_bad (_("symbol `%s' is already defined"), name
);
3257 symbolP
= symbol_clone (symbolP
, 0);
3259 /* If the symbol is volatile, copy the symbol and replace the
3260 original with the copy, so that previous uses of the symbol will
3261 retain the value of the symbol at the point of use. */
3262 else if (S_IS_VOLATILE (symbolP
))
3263 symbolP
= symbol_clone (symbolP
, 1);
3267 S_SET_VOLATILE (symbolP
);
3269 S_SET_FORWARD_REF (symbolP
);
3271 pseudo_set (symbolP
);
3274 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3275 then this is .equiv, and it is an error if the symbol is already
3276 defined. If EQUIV is -1, the symbol additionally is a forward
3284 /* Especial apologies for the random logic:
3285 this just grew, and could be parsed much more simply!
3287 if ((name
= read_symbol_name ()) == NULL
)
3290 if (*input_line_pointer
!= ',')
3292 as_bad (_("expected comma after \"%s\""), name
);
3293 ignore_rest_of_line ();
3298 input_line_pointer
++;
3299 assign_symbol (name
, equiv
);
3300 demand_empty_rest_of_line ();
3314 #ifdef md_flush_pending_output
3315 md_flush_pending_output ();
3318 #ifdef md_cons_align
3323 stop
= mri_comment_field (&stopc
);
3325 /* In m68k MRI mode, we need to align to a word boundary, unless
3327 if (flag_m68k_mri
&& mult
> 1)
3329 if (now_seg
== absolute_section
)
3331 abs_section_offset
+= abs_section_offset
& 1;
3332 if (line_label
!= NULL
)
3333 S_SET_VALUE (line_label
, abs_section_offset
);
3335 else if (mri_common_symbol
!= NULL
)
3339 mri_val
= S_GET_VALUE (mri_common_symbol
);
3340 if ((mri_val
& 1) != 0)
3342 S_SET_VALUE (mri_common_symbol
, mri_val
+ 1);
3343 if (line_label
!= NULL
)
3345 expressionS
*symexp
;
3347 symexp
= symbol_get_value_expression (line_label
);
3348 know (symexp
->X_op
== O_symbol
);
3349 know (symexp
->X_add_symbol
== mri_common_symbol
);
3350 symexp
->X_add_number
+= 1;
3356 do_align (1, (char *) NULL
, 0, 0);
3357 if (line_label
!= NULL
)
3359 symbol_set_frag (line_label
, frag_now
);
3360 S_SET_VALUE (line_label
, frag_now_fix ());
3370 if (*input_line_pointer
== ',')
3372 ++input_line_pointer
;
3377 val
.X_op
= O_constant
;
3378 val
.X_add_number
= 0;
3381 if ((val
.X_op
!= O_constant
3382 || val
.X_add_number
< - 0x80
3383 || val
.X_add_number
> 0xff
3384 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
3385 && (now_seg
!= absolute_section
&& !in_bss ()))
3387 resolve_expression (&exp
);
3388 if (exp
.X_op
!= O_constant
)
3389 as_bad (_("unsupported variable size or fill value"));
3396 bytes
= mult
* exp
.X_add_number
;
3397 for (i
= 0; i
< exp
.X_add_number
; i
++)
3398 emit_expr (&val
, mult
);
3403 if (now_seg
== absolute_section
|| mri_common_symbol
!= NULL
)
3404 resolve_expression (&exp
);
3406 if (exp
.X_op
== O_constant
)
3410 repeat
= exp
.X_add_number
;
3417 as_warn (_(".space repeat count is zero, ignored"));
3418 else if (repeat
< 0)
3419 as_warn (_(".space repeat count is negative, ignored"));
3423 /* If we are in the absolute section, just bump the offset. */
3424 if (now_seg
== absolute_section
)
3426 if (val
.X_op
!= O_constant
|| val
.X_add_number
!= 0)
3427 as_warn (_("ignoring fill value in absolute section"));
3428 abs_section_offset
+= repeat
;
3432 /* If we are secretly in an MRI common section, then
3433 creating space just increases the size of the common
3435 if (mri_common_symbol
!= NULL
)
3437 S_SET_VALUE (mri_common_symbol
,
3438 S_GET_VALUE (mri_common_symbol
) + repeat
);
3443 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
3444 (offsetT
) repeat
, (char *) 0);
3448 if (now_seg
== absolute_section
)
3450 as_bad (_("space allocation too complex in absolute section"));
3451 subseg_set (text_section
, 0);
3454 if (mri_common_symbol
!= NULL
)
3456 as_bad (_("space allocation too complex in common section"));
3457 mri_common_symbol
= NULL
;
3461 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
3462 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
3465 if ((val
.X_op
!= O_constant
|| val
.X_add_number
!= 0) && in_bss ())
3466 as_warn (_("ignoring fill value in section `%s'"),
3467 segment_name (now_seg
));
3469 *p
= val
.X_add_number
;
3474 /* In MRI mode, after an odd number of bytes, we must align to an
3475 even word boundary, unless the next instruction is a dc.b, ds.b
3477 if (flag_mri
&& (bytes
& 1) != 0)
3478 mri_pending_align
= 1;
3480 demand_empty_rest_of_line ();
3483 mri_comment_end (stop
, stopc
);
3486 /* This is like s_space, but the value is a floating point number with
3487 the given precision. This is for the MRI dcb.s pseudo-op and
3491 s_float_space (int float_type
)
3495 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
3499 #ifdef md_cons_align
3504 stop
= mri_comment_field (&stopc
);
3506 count
= get_absolute_expression ();
3509 if (*input_line_pointer
!= ',')
3511 as_bad (_("missing value"));
3512 ignore_rest_of_line ();
3514 mri_comment_end (stop
, stopc
);
3518 ++input_line_pointer
;
3522 /* Skip any 0{letter} that may be present. Don't even check if the
3523 * letter is legal. */
3524 if (input_line_pointer
[0] == '0'
3525 && ISALPHA (input_line_pointer
[1]))
3526 input_line_pointer
+= 2;
3528 /* Accept :xxxx, where the x's are hex digits, for a floating point
3529 with the exact digits specified. */
3530 if (input_line_pointer
[0] == ':')
3532 flen
= hex_float (float_type
, temp
);
3535 ignore_rest_of_line ();
3537 mri_comment_end (stop
, stopc
);
3545 err
= md_atof (float_type
, temp
, &flen
);
3546 know (flen
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3547 know (err
!= NULL
|| flen
> 0);
3550 as_bad (_("bad floating literal: %s"), err
);
3551 ignore_rest_of_line ();
3553 mri_comment_end (stop
, stopc
);
3558 while (--count
>= 0)
3562 p
= frag_more (flen
);
3563 memcpy (p
, temp
, (unsigned int) flen
);
3566 demand_empty_rest_of_line ();
3569 mri_comment_end (stop
, stopc
);
3572 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3575 s_struct (int ignore ATTRIBUTE_UNUSED
)
3581 stop
= mri_comment_field (&stopc
);
3582 abs_section_offset
= get_absolute_expression ();
3583 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3584 /* The ELF backend needs to know that we are changing sections, so
3585 that .previous works correctly. */
3587 obj_elf_section_change_hook ();
3589 subseg_set (absolute_section
, 0);
3590 demand_empty_rest_of_line ();
3592 mri_comment_end (stop
, stopc
);
3596 s_text (int ignore ATTRIBUTE_UNUSED
)
3600 temp
= get_absolute_expression ();
3601 subseg_set (text_section
, (subsegT
) temp
);
3602 demand_empty_rest_of_line ();
3605 /* .weakref x, y sets x as an alias to y that, as long as y is not
3606 referenced directly, will cause y to become a weak symbol. */
3608 s_weakref (int ignore ATTRIBUTE_UNUSED
)
3615 if ((name
= read_symbol_name ()) == NULL
)
3618 symbolP
= symbol_find_or_make (name
);
3620 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3622 if (!S_IS_VOLATILE (symbolP
))
3624 as_bad (_("symbol `%s' is already defined"), name
);
3627 symbolP
= symbol_clone (symbolP
, 1);
3628 S_CLEAR_VOLATILE (symbolP
);
3633 if (*input_line_pointer
!= ',')
3635 as_bad (_("expected comma after \"%s\""), name
);
3639 input_line_pointer
++;
3644 if ((name
= read_symbol_name ()) == NULL
)
3647 if ((symbolP2
= symbol_find_noref (name
, 1)) == NULL
3648 && (symbolP2
= md_undefined_symbol (name
)) == NULL
)
3650 symbolP2
= symbol_find_or_make (name
);
3651 S_SET_WEAKREFD (symbolP2
);
3655 symbolS
*symp
= symbolP2
;
3657 while (S_IS_WEAKREFR (symp
) && symp
!= symbolP
)
3659 expressionS
*expP
= symbol_get_value_expression (symp
);
3661 gas_assert (expP
->X_op
== O_symbol
3662 && expP
->X_add_number
== 0);
3663 symp
= expP
->X_add_symbol
;
3665 if (symp
== symbolP
)
3669 loop
= concat (S_GET_NAME (symbolP
),
3670 " => ", S_GET_NAME (symbolP2
), (const char *) NULL
);
3673 while (symp
!= symbolP
)
3675 char *old_loop
= loop
;
3677 symp
= symbol_get_value_expression (symp
)->X_add_symbol
;
3678 loop
= concat (loop
, " => ", S_GET_NAME (symp
),
3679 (const char *) NULL
);
3683 as_bad (_("%s: would close weakref loop: %s"),
3684 S_GET_NAME (symbolP
), loop
);
3688 ignore_rest_of_line ();
3692 /* Short-circuiting instead of just checking here might speed
3693 things up a tiny little bit, but loop error messages would
3694 miss intermediate links. */
3695 /* symbolP2 = symp; */
3698 memset (&exp
, 0, sizeof (exp
));
3699 exp
.X_op
= O_symbol
;
3700 exp
.X_add_symbol
= symbolP2
;
3702 S_SET_SEGMENT (symbolP
, undefined_section
);
3703 symbol_set_value_expression (symbolP
, &exp
);
3704 symbol_set_frag (symbolP
, &zero_address_frag
);
3705 S_SET_WEAKREFR (symbolP
);
3707 demand_empty_rest_of_line ();
3712 ignore_rest_of_line ();
3718 /* Verify that we are at the end of a line. If not, issue an error and
3722 demand_empty_rest_of_line (void)
3725 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3726 input_line_pointer
++;
3729 if (ISPRINT (*input_line_pointer
))
3730 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3731 *input_line_pointer
);
3733 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3734 *input_line_pointer
);
3735 ignore_rest_of_line ();
3738 /* Return pointing just after end-of-line. */
3739 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3742 /* Silently advance to the end of line. Use this after already having
3743 issued an error about something bad. */
3746 ignore_rest_of_line (void)
3748 while (input_line_pointer
< buffer_limit
3749 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3750 input_line_pointer
++;
3752 input_line_pointer
++;
3754 /* Return pointing just after end-of-line. */
3755 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3758 /* Sets frag for given symbol to zero_address_frag, except when the
3759 symbol frag is already set to a dummy listing frag. */
3762 set_zero_frag (symbolS
*symbolP
)
3764 if (symbol_get_frag (symbolP
)->fr_type
!= rs_dummy
)
3765 symbol_set_frag (symbolP
, &zero_address_frag
);
3768 /* In: Pointer to a symbol.
3769 Input_line_pointer->expression.
3771 Out: Input_line_pointer->just after any whitespace after expression.
3772 Tried to set symbol to value of expression.
3773 Will change symbols type, value, and frag; */
3776 pseudo_set (symbolS
*symbolP
)
3781 know (symbolP
); /* NULL pointer is logic error. */
3783 if (!S_IS_FORWARD_REF (symbolP
))
3784 (void) expression (&exp
);
3786 (void) deferred_expression (&exp
);
3788 if (exp
.X_op
== O_illegal
)
3789 as_bad (_("illegal expression"));
3790 else if (exp
.X_op
== O_absent
)
3791 as_bad (_("missing expression"));
3792 else if (exp
.X_op
== O_big
)
3794 if (exp
.X_add_number
> 0)
3795 as_bad (_("bignum invalid"));
3797 as_bad (_("floating point number invalid"));
3799 else if (exp
.X_op
== O_subtract
3800 && !S_IS_FORWARD_REF (symbolP
)
3801 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
3802 && (symbol_get_frag (exp
.X_add_symbol
)
3803 == symbol_get_frag (exp
.X_op_symbol
)))
3805 exp
.X_op
= O_constant
;
3806 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
3807 - S_GET_VALUE (exp
.X_op_symbol
));
3810 if (symbol_section_p (symbolP
))
3812 as_bad ("attempt to set value of section symbol");
3821 exp
.X_add_number
= 0;
3824 S_SET_SEGMENT (symbolP
, absolute_section
);
3825 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3826 set_zero_frag (symbolP
);
3830 #ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
3831 if (S_IS_EXTERNAL (symbolP
))
3833 as_bad ("can't equate global symbol `%s' with register name",
3834 S_GET_NAME (symbolP
));
3838 S_SET_SEGMENT (symbolP
, reg_section
);
3839 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3840 set_zero_frag (symbolP
);
3841 symbol_get_value_expression (symbolP
)->X_op
= O_register
;
3845 seg
= S_GET_SEGMENT (exp
.X_add_symbol
);
3846 /* For x=undef+const, create an expression symbol.
3847 For x=x+const, just update x except when x is an undefined symbol
3848 For x=defined+const, evaluate x. */
3849 if (symbolP
== exp
.X_add_symbol
3850 && (seg
!= undefined_section
3851 || !symbol_constant_p (symbolP
)))
3853 *symbol_X_add_number (symbolP
) += exp
.X_add_number
;
3856 else if (!S_IS_FORWARD_REF (symbolP
) && seg
!= undefined_section
)
3858 symbolS
*s
= exp
.X_add_symbol
;
3860 if (S_IS_COMMON (s
))
3861 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3862 S_GET_NAME (symbolP
), S_GET_NAME (s
));
3864 S_SET_SEGMENT (symbolP
, seg
);
3865 S_SET_VALUE (symbolP
, exp
.X_add_number
+ S_GET_VALUE (s
));
3866 symbol_set_frag (symbolP
, symbol_get_frag (s
));
3867 copy_symbol_attributes (symbolP
, s
);
3870 S_SET_SEGMENT (symbolP
, undefined_section
);
3871 symbol_set_value_expression (symbolP
, &exp
);
3872 copy_symbol_attributes (symbolP
, exp
.X_add_symbol
);
3873 set_zero_frag (symbolP
);
3877 /* The value is some complex expression. */
3878 S_SET_SEGMENT (symbolP
, expr_section
);
3879 symbol_set_value_expression (symbolP
, &exp
);
3880 set_zero_frag (symbolP
);
3887 CONStruct more frag of .bytes, or .words etc.
3888 Should need_pass_2 be 1 then emit no frag(s).
3889 This understands EXPRESSIONS.
3893 This has a split personality. We use expression() to read the
3894 value. We can detect if the value won't fit in a byte or word.
3895 But we can't detect if expression() discarded significant digits
3896 in the case of a long. Not worth the crocks required to fix it. */
3898 /* Select a parser for cons expressions. */
3900 /* Some targets need to parse the expression in various fancy ways.
3901 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3902 (for example, the HPPA does this). Otherwise, you can define
3903 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3904 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3905 are defined, which is the normal case, then only simple expressions
3910 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
3913 #ifndef TC_PARSE_CONS_EXPRESSION
3914 #ifdef BITFIELD_CONS_EXPRESSIONS
3915 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3916 (parse_bitfield_cons (EXP, NBYTES), TC_PARSE_CONS_RETURN_NONE)
3918 parse_bitfield_cons (expressionS
*exp
, unsigned int nbytes
);
3920 #ifdef REPEAT_CONS_EXPRESSIONS
3921 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3922 (parse_repeat_cons (EXP, NBYTES), TC_PARSE_CONS_RETURN_NONE)
3924 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
3927 /* If we haven't gotten one yet, just call expression. */
3928 #ifndef TC_PARSE_CONS_EXPRESSION
3929 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3930 (expression (EXP), TC_PARSE_CONS_RETURN_NONE)
3935 do_parse_cons_expression (expressionS
*exp
,
3936 int nbytes ATTRIBUTE_UNUSED
)
3938 (void) TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3942 /* Worker to do .byte etc statements.
3943 Clobbers input_line_pointer and checks end-of-line. */
3946 cons_worker (int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
3954 #ifdef md_flush_pending_output
3955 md_flush_pending_output ();
3959 stop
= mri_comment_field (&stopc
);
3961 if (is_it_end_of_statement ())
3963 demand_empty_rest_of_line ();
3965 mri_comment_end (stop
, stopc
);
3969 #ifdef TC_ADDRESS_BYTES
3971 nbytes
= TC_ADDRESS_BYTES ();
3974 #ifdef md_cons_align
3975 md_cons_align (nbytes
);
3981 TC_PARSE_CONS_RETURN_TYPE ret
= TC_PARSE_CONS_RETURN_NONE
;
3982 #ifdef TC_CONS_FIX_CHECK
3983 fixS
**cur_fix
= &frchain_now
->fix_tail
;
3985 if (*cur_fix
!= NULL
)
3986 cur_fix
= &(*cur_fix
)->fx_next
;
3991 parse_mri_cons (&exp
, (unsigned int) nbytes
);
3996 if (*input_line_pointer
== '"')
3998 as_bad (_("unexpected `\"' in expression"));
3999 ignore_rest_of_line ();
4003 ret
= TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
4008 if (exp
.X_op
== O_symbol
)
4009 exp
.X_op
= O_symbol_rva
;
4011 as_fatal (_("rva without symbol"));
4013 emit_expr_with_reloc (&exp
, (unsigned int) nbytes
, ret
);
4014 #ifdef TC_CONS_FIX_CHECK
4015 TC_CONS_FIX_CHECK (&exp
, nbytes
, *cur_fix
);
4019 while (*input_line_pointer
++ == ',');
4021 /* In MRI mode, after an odd number of bytes, we must align to an
4022 even word boundary, unless the next instruction is a dc.b, ds.b
4024 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
4025 mri_pending_align
= 1;
4027 input_line_pointer
--; /* Put terminator back into stream. */
4029 demand_empty_rest_of_line ();
4032 mri_comment_end (stop
, stopc
);
4038 cons_worker (size
, 0);
4044 cons_worker (size
, 1);
4047 /* .reloc offset, reloc_name, symbol+addend. */
4050 s_reloc (int ignore ATTRIBUTE_UNUSED
)
4057 struct reloc_list
*reloc
;
4058 struct _bfd_rel
{ const char * name
; bfd_reloc_code_real_type code
; };
4059 static struct _bfd_rel bfd_relocs
[] =
4061 { "NONE", BFD_RELOC_NONE
},
4062 { "8", BFD_RELOC_8
},
4063 { "16", BFD_RELOC_16
},
4064 { "32", BFD_RELOC_32
},
4065 { "64", BFD_RELOC_64
}
4068 reloc
= (struct reloc_list
*) xmalloc (sizeof (*reloc
));
4071 stop
= mri_comment_field (&stopc
);
4080 as_bad (_("missing or bad offset expression"));
4083 exp
.X_add_symbol
= section_symbol (now_seg
);
4084 exp
.X_op
= O_symbol
;
4087 if (exp
.X_add_number
== 0)
4089 reloc
->u
.a
.offset_sym
= exp
.X_add_symbol
;
4094 reloc
->u
.a
.offset_sym
= make_expr_symbol (&exp
);
4099 if (*input_line_pointer
!= ',')
4101 as_bad (_("missing reloc type"));
4105 ++input_line_pointer
;
4107 c
= get_symbol_name (& r_name
);
4108 if (strncasecmp (r_name
, "BFD_RELOC_", 10) == 0)
4112 for (reloc
->u
.a
.howto
= NULL
, i
= 0; i
< ARRAY_SIZE (bfd_relocs
); i
++)
4113 if (strcasecmp (r_name
+ 10, bfd_relocs
[i
].name
) == 0)
4115 reloc
->u
.a
.howto
= bfd_reloc_type_lookup (stdoutput
,
4116 bfd_relocs
[i
].code
);
4121 reloc
->u
.a
.howto
= bfd_reloc_name_lookup (stdoutput
, r_name
);
4122 *input_line_pointer
= c
;
4123 if (reloc
->u
.a
.howto
== NULL
)
4125 as_bad (_("unrecognized reloc type"));
4129 exp
.X_op
= O_absent
;
4130 SKIP_WHITESPACE_AFTER_NAME ();
4131 if (*input_line_pointer
== ',')
4133 ++input_line_pointer
;
4141 as_bad (_("bad reloc expression"));
4143 ignore_rest_of_line ();
4146 mri_comment_end (stop
, stopc
);
4149 reloc
->u
.a
.sym
= NULL
;
4150 reloc
->u
.a
.addend
= 0;
4153 reloc
->u
.a
.sym
= NULL
;
4154 reloc
->u
.a
.addend
= exp
.X_add_number
;
4157 reloc
->u
.a
.sym
= exp
.X_add_symbol
;
4158 reloc
->u
.a
.addend
= exp
.X_add_number
;
4161 reloc
->u
.a
.sym
= make_expr_symbol (&exp
);
4162 reloc
->u
.a
.addend
= 0;
4166 as_where (&reloc
->file
, &reloc
->line
);
4167 reloc
->next
= reloc_list
;
4170 demand_empty_rest_of_line ();
4172 mri_comment_end (stop
, stopc
);
4175 /* Put the contents of expression EXP into the object file using
4176 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
4179 emit_expr (expressionS
*exp
, unsigned int nbytes
)
4181 emit_expr_with_reloc (exp
, nbytes
, TC_PARSE_CONS_RETURN_NONE
);
4185 emit_expr_with_reloc (expressionS
*exp
,
4186 unsigned int nbytes
,
4187 TC_PARSE_CONS_RETURN_TYPE reloc
)
4191 valueT extra_digit
= 0;
4193 /* Don't do anything if we are going to make another pass. */
4198 dot_value
= frag_now_fix ();
4199 dot_frag
= frag_now
;
4203 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
4204 appear as a four byte positive constant in the .line section,
4205 followed by a 2 byte 0xffff. Look for that case here. */
4207 static int dwarf_line
= -1;
4209 if (strcmp (segment_name (now_seg
), ".line") != 0)
4211 else if (dwarf_line
>= 0
4213 && exp
->X_op
== O_constant
4214 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
4215 listing_source_line ((unsigned int) dwarf_line
);
4216 else if (nbytes
== 4
4217 && exp
->X_op
== O_constant
4218 && exp
->X_add_number
>= 0)
4219 dwarf_line
= exp
->X_add_number
;
4224 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
4225 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
4226 AT_sibling (0x12) followed by a four byte address of the sibling
4227 followed by a 2 byte AT_name (0x38) followed by the name of the
4228 file. We look for that case here. */
4230 static int dwarf_file
= 0;
4232 if (strcmp (segment_name (now_seg
), ".debug") != 0)
4234 else if (dwarf_file
== 0
4236 && exp
->X_op
== O_constant
4237 && exp
->X_add_number
== 0x11)
4239 else if (dwarf_file
== 1
4241 && exp
->X_op
== O_constant
4242 && exp
->X_add_number
== 0x12)
4244 else if (dwarf_file
== 2
4247 else if (dwarf_file
== 3
4249 && exp
->X_op
== O_constant
4250 && exp
->X_add_number
== 0x38)
4255 /* The variable dwarf_file_string tells stringer that the string
4256 may be the name of the source file. */
4257 if (dwarf_file
== 4)
4258 dwarf_file_string
= 1;
4260 dwarf_file_string
= 0;
4265 if (check_eh_frame (exp
, &nbytes
))
4270 /* Handle a negative bignum. */
4272 && exp
->X_add_number
== 0
4273 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
4274 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
4277 unsigned long carry
;
4279 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
4281 /* Negate the bignum: one's complement each digit and add 1. */
4283 for (i
= 0; i
< exp
->X_add_number
; i
++)
4287 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
4290 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
4291 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
4294 /* We can ignore any carry out, because it will be handled by
4295 extra_digit if it is needed. */
4297 extra_digit
= (valueT
) -1;
4301 if (op
== O_absent
|| op
== O_illegal
)
4303 as_warn (_("zero assumed for missing expression"));
4304 exp
->X_add_number
= 0;
4307 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4309 as_bad (_("floating point number invalid"));
4310 exp
->X_add_number
= 0;
4313 else if (op
== O_register
)
4315 as_warn (_("register value used as expression"));
4319 /* Allow `.word 0' in the absolute section. */
4320 if (now_seg
== absolute_section
)
4322 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
4323 as_bad (_("attempt to store value in absolute section"));
4324 abs_section_offset
+= nbytes
;
4328 /* Allow `.word 0' in BSS style sections. */
4329 if ((op
!= O_constant
|| exp
->X_add_number
!= 0) && in_bss ())
4330 as_bad (_("attempt to store non-zero value in section `%s'"),
4331 segment_name (now_seg
));
4333 p
= frag_more ((int) nbytes
);
4335 if (reloc
!= TC_PARSE_CONS_RETURN_NONE
)
4337 emit_expr_fix (exp
, nbytes
, frag_now
, p
, reloc
);
4341 #ifndef WORKING_DOT_WORD
4342 /* If we have the difference of two symbols in a word, save it on
4343 the broken_words list. See the code in write.c. */
4344 if (op
== O_subtract
&& nbytes
== 2)
4346 struct broken_word
*x
;
4348 x
= (struct broken_word
*) xmalloc (sizeof (struct broken_word
));
4349 x
->next_broken_word
= broken_words
;
4352 x
->subseg
= now_subseg
;
4354 x
->word_goes_here
= p
;
4356 x
->add
= exp
->X_add_symbol
;
4357 x
->sub
= exp
->X_op_symbol
;
4358 x
->addnum
= exp
->X_add_number
;
4366 /* If we have an integer, but the number of bytes is too large to
4367 pass to md_number_to_chars, handle it as a bignum. */
4368 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
4370 extra_digit
= exp
->X_unsigned
? 0 : -1;
4371 convert_to_bignum (exp
, !exp
->X_unsigned
);
4375 if (op
== O_constant
)
4383 /* JF << of >= number of bits in the object is undefined. In
4384 particular SPARC (Sun 4) has problems. */
4385 if (nbytes
>= sizeof (valueT
))
4388 if (nbytes
> sizeof (valueT
))
4391 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
4395 /* Don't store these bits. */
4396 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
4397 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
4400 unmask
= ~mask
; /* Do store these bits. */
4403 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
4404 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
4407 get
= exp
->X_add_number
;
4409 if ((get
& mask
) != 0
4410 && ((get
& mask
) != mask
4411 || (get
& hibit
) == 0))
4412 { /* Leading bits contain both 0s & 1s. */
4413 #if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG
4415 as_warn (_("value 0x%llx truncated to 0x%llx"),
4416 (unsigned long long) get
, (unsigned long long) use
);
4418 as_warn (_("value 0x%I64x truncated to 0x%I64x"),
4419 (unsigned long long) get
, (unsigned long long) use
);
4422 as_warn (_("value 0x%lx truncated to 0x%lx"),
4423 (unsigned long) get
, (unsigned long) use
);
4426 /* Put bytes in right order. */
4427 md_number_to_chars (p
, use
, (int) nbytes
);
4429 else if (op
== O_big
)
4432 LITTLENUM_TYPE
*nums
;
4434 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
4437 int i
= nbytes
/ CHARS_PER_LITTLENUM
;
4440 LITTLENUM_TYPE sign
= 0;
4441 if ((generic_bignum
[--i
]
4442 & (1 << (LITTLENUM_NUMBER_OF_BITS
- 1))) != 0)
4443 sign
= ~(LITTLENUM_TYPE
) 0;
4444 while (++i
< exp
->X_add_number
)
4445 if (generic_bignum
[i
] != sign
)
4448 if (i
< exp
->X_add_number
)
4449 as_warn (_("bignum truncated to %d bytes"), nbytes
);
4455 md_number_to_chars (p
, (valueT
) generic_bignum
[0], 1);
4458 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
4460 if (target_big_endian
)
4462 while (nbytes
> size
)
4464 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4465 nbytes
-= CHARS_PER_LITTLENUM
;
4466 p
+= CHARS_PER_LITTLENUM
;
4469 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
4470 while (size
>= CHARS_PER_LITTLENUM
)
4473 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4474 size
-= CHARS_PER_LITTLENUM
;
4475 p
+= CHARS_PER_LITTLENUM
;
4480 nums
= generic_bignum
;
4481 while (size
>= CHARS_PER_LITTLENUM
)
4483 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4485 size
-= CHARS_PER_LITTLENUM
;
4486 p
+= CHARS_PER_LITTLENUM
;
4487 nbytes
-= CHARS_PER_LITTLENUM
;
4490 while (nbytes
>= CHARS_PER_LITTLENUM
)
4492 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4493 nbytes
-= CHARS_PER_LITTLENUM
;
4494 p
+= CHARS_PER_LITTLENUM
;
4499 emit_expr_fix (exp
, nbytes
, frag_now
, p
, TC_PARSE_CONS_RETURN_NONE
);
4503 emit_expr_fix (expressionS
*exp
, unsigned int nbytes
, fragS
*frag
, char *p
,
4504 TC_PARSE_CONS_RETURN_TYPE r ATTRIBUTE_UNUSED
)
4507 unsigned int size
= nbytes
;
4509 memset (p
, 0, size
);
4511 /* Generate a fixS to record the symbol value. */
4513 #ifdef TC_CONS_FIX_NEW
4514 TC_CONS_FIX_NEW (frag
, p
- frag
->fr_literal
+ offset
, size
, exp
, r
);
4516 if (r
!= TC_PARSE_CONS_RETURN_NONE
)
4518 reloc_howto_type
*reloc_howto
;
4520 reloc_howto
= bfd_reloc_type_lookup (stdoutput
, r
);
4521 size
= bfd_get_reloc_size (reloc_howto
);
4525 as_bad (_("%s relocations do not fit in %u bytes\n"),
4526 reloc_howto
->name
, nbytes
);
4529 else if (target_big_endian
)
4530 offset
= nbytes
- size
;
4551 as_bad (_("unsupported BFD relocation size %u"), size
);
4554 fix_new_exp (frag
, p
- frag
->fr_literal
+ offset
, size
,
4559 #ifdef BITFIELD_CONS_EXPRESSIONS
4561 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
4562 w:x,y:z, where w and y are bitwidths and x and y are values. They
4563 then pack them all together. We do a little better in that we allow
4564 them in words, longs, etc. and we'll pack them in target byte order
4567 The rules are: pack least significant bit first, if a field doesn't
4568 entirely fit, put it in the next unit. Overflowing the bitfield is
4569 explicitly *not* even a warning. The bitwidth should be considered
4572 To use this function the tc-XXX.h file should define
4573 BITFIELD_CONS_EXPRESSIONS. */
4576 parse_bitfield_cons (exp
, nbytes
)
4578 unsigned int nbytes
;
4580 unsigned int bits_available
= BITS_PER_CHAR
* nbytes
;
4581 char *hold
= input_line_pointer
;
4583 (void) expression (exp
);
4585 if (*input_line_pointer
== ':')
4592 unsigned long width
;
4594 if (*input_line_pointer
!= ':')
4596 input_line_pointer
= hold
;
4598 } /* Next piece is not a bitfield. */
4600 /* In the general case, we can't allow
4601 full expressions with symbol
4602 differences and such. The relocation
4603 entries for symbols not defined in this
4604 assembly would require arbitrary field
4605 widths, positions, and masks which most
4606 of our current object formats don't
4609 In the specific case where a symbol
4610 *is* defined in this assembly, we
4611 *could* build fixups and track it, but
4612 this could lead to confusion for the
4613 backends. I'm lazy. I'll take any
4614 SEG_ABSOLUTE. I think that means that
4615 you can use a previous .set or
4616 .equ type symbol. xoxorich. */
4618 if (exp
->X_op
== O_absent
)
4620 as_warn (_("using a bit field width of zero"));
4621 exp
->X_add_number
= 0;
4622 exp
->X_op
= O_constant
;
4623 } /* Implied zero width bitfield. */
4625 if (exp
->X_op
!= O_constant
)
4627 *input_line_pointer
= '\0';
4628 as_bad (_("field width \"%s\" too complex for a bitfield"), hold
);
4629 *input_line_pointer
= ':';
4630 demand_empty_rest_of_line ();
4632 } /* Too complex. */
4634 if ((width
= exp
->X_add_number
) > (BITS_PER_CHAR
* nbytes
))
4636 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4637 width
, nbytes
, (BITS_PER_CHAR
* nbytes
));
4638 width
= BITS_PER_CHAR
* nbytes
;
4641 if (width
> bits_available
)
4643 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4644 input_line_pointer
= hold
;
4645 exp
->X_add_number
= value
;
4650 hold
= ++input_line_pointer
;
4652 (void) expression (exp
);
4653 if (exp
->X_op
!= O_constant
)
4655 char cache
= *input_line_pointer
;
4657 *input_line_pointer
= '\0';
4658 as_bad (_("field value \"%s\" too complex for a bitfield"), hold
);
4659 *input_line_pointer
= cache
;
4660 demand_empty_rest_of_line ();
4662 } /* Too complex. */
4664 value
|= ((~(-(1 << width
)) & exp
->X_add_number
)
4665 << ((BITS_PER_CHAR
* nbytes
) - bits_available
));
4667 if ((bits_available
-= width
) == 0
4668 || is_it_end_of_statement ()
4669 || *input_line_pointer
!= ',')
4672 } /* All the bitfields we're gonna get. */
4674 hold
= ++input_line_pointer
;
4675 (void) expression (exp
);
4678 exp
->X_add_number
= value
;
4679 exp
->X_op
= O_constant
;
4680 exp
->X_unsigned
= 1;
4681 exp
->X_extrabit
= 0;
4685 #endif /* BITFIELD_CONS_EXPRESSIONS */
4687 /* Handle an MRI style string expression. */
4691 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
)
4693 if (*input_line_pointer
!= '\''
4694 && (input_line_pointer
[1] != '\''
4695 || (*input_line_pointer
!= 'A'
4696 && *input_line_pointer
!= 'E')))
4697 (void) TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
4701 unsigned int result
= 0;
4703 /* An MRI style string. Cut into as many bytes as will fit into
4704 a nbyte chunk, left justify if necessary, and separate with
4705 commas so we can try again later. */
4706 if (*input_line_pointer
== 'A')
4707 ++input_line_pointer
;
4708 else if (*input_line_pointer
== 'E')
4710 as_bad (_("EBCDIC constants are not supported"));
4711 ++input_line_pointer
;
4714 input_line_pointer
++;
4715 for (scan
= 0; scan
< nbytes
; scan
++)
4717 if (*input_line_pointer
== '\'')
4719 if (input_line_pointer
[1] == '\'')
4721 input_line_pointer
++;
4726 result
= (result
<< 8) | (*input_line_pointer
++);
4730 while (scan
< nbytes
)
4736 /* Create correct expression. */
4737 exp
->X_op
= O_constant
;
4738 exp
->X_add_number
= result
;
4740 /* Fake it so that we can read the next char too. */
4741 if (input_line_pointer
[0] != '\'' ||
4742 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
4744 input_line_pointer
-= 2;
4745 input_line_pointer
[0] = ',';
4746 input_line_pointer
[1] = '\'';
4749 input_line_pointer
++;
4752 #endif /* TC_M68K */
4754 #ifdef REPEAT_CONS_EXPRESSIONS
4756 /* Parse a repeat expression for cons. This is used by the MIPS
4757 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4758 object file COUNT times.
4760 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4763 parse_repeat_cons (exp
, nbytes
)
4765 unsigned int nbytes
;
4772 if (*input_line_pointer
!= ':')
4774 /* No repeat count. */
4778 ++input_line_pointer
;
4779 expression (&count
);
4780 if (count
.X_op
!= O_constant
4781 || count
.X_add_number
<= 0)
4783 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4787 /* The cons function is going to output this expression once. So we
4788 output it count - 1 times. */
4789 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
4790 emit_expr (exp
, nbytes
);
4793 #endif /* REPEAT_CONS_EXPRESSIONS */
4795 /* Parse a floating point number represented as a hex constant. This
4796 permits users to specify the exact bits they want in the floating
4800 hex_float (int float_type
, char *bytes
)
4832 as_bad (_("unknown floating type type '%c'"), float_type
);
4836 /* It would be nice if we could go through expression to parse the
4837 hex constant, but if we get a bignum it's a pain to sort it into
4838 the buffer correctly. */
4840 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4844 /* The MRI assembler accepts arbitrary underscores strewn about
4845 through the hex constant, so we ignore them as well. */
4846 if (*input_line_pointer
== '_')
4848 ++input_line_pointer
;
4854 as_warn (_("floating point constant too large"));
4857 d
= hex_value (*input_line_pointer
) << 4;
4858 ++input_line_pointer
;
4859 while (*input_line_pointer
== '_')
4860 ++input_line_pointer
;
4861 if (hex_p (*input_line_pointer
))
4863 d
+= hex_value (*input_line_pointer
);
4864 ++input_line_pointer
;
4866 if (target_big_endian
)
4869 bytes
[length
- i
- 1] = d
;
4875 if (target_big_endian
)
4876 memset (bytes
+ i
, 0, length
- i
);
4878 memset (bytes
, 0, length
- i
);
4886 CONStruct some more frag chars of .floats .ffloats etc.
4887 Makes 0 or more new frags.
4888 If need_pass_2 == 1, no frags are emitted.
4889 This understands only floating literals, not expressions. Sorry.
4891 A floating constant is defined by atof_generic(), except it is preceded
4892 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4893 reading, I decided to be incompatible. This always tries to give you
4894 rounded bits to the precision of the pseudo-op. Former AS did premature
4895 truncation, restored noisy bits instead of trailing 0s AND gave you
4896 a choice of 2 flavours of noise according to which of 2 floating-point
4897 scanners you directed AS to use.
4899 In: input_line_pointer->whitespace before, or '0' of flonum. */
4902 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4903 int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4906 int length
; /* Number of chars in an object. */
4907 char *err
; /* Error from scanning floating literal. */
4908 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4910 if (is_it_end_of_statement ())
4912 demand_empty_rest_of_line ();
4916 if (now_seg
== absolute_section
)
4918 as_bad (_("attempt to store float in absolute section"));
4919 ignore_rest_of_line ();
4925 as_bad (_("attempt to store float in section `%s'"),
4926 segment_name (now_seg
));
4927 ignore_rest_of_line ();
4931 #ifdef md_flush_pending_output
4932 md_flush_pending_output ();
4935 #ifdef md_cons_align
4941 /* input_line_pointer->1st char of a flonum (we hope!). */
4944 /* Skip any 0{letter} that may be present. Don't even check if the
4945 letter is legal. Someone may invent a "z" format and this routine
4946 has no use for such information. Lusers beware: you get
4947 diagnostics if your input is ill-conditioned. */
4948 if (input_line_pointer
[0] == '0'
4949 && ISALPHA (input_line_pointer
[1]))
4950 input_line_pointer
+= 2;
4952 /* Accept :xxxx, where the x's are hex digits, for a floating
4953 point with the exact digits specified. */
4954 if (input_line_pointer
[0] == ':')
4956 ++input_line_pointer
;
4957 length
= hex_float (float_type
, temp
);
4960 ignore_rest_of_line ();
4966 err
= md_atof (float_type
, temp
, &length
);
4967 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
4968 know (err
!= NULL
|| length
> 0);
4971 as_bad (_("bad floating literal: %s"), err
);
4972 ignore_rest_of_line ();
4983 #ifdef REPEAT_CONS_EXPRESSIONS
4984 if (*input_line_pointer
== ':')
4986 expressionS count_exp
;
4988 ++input_line_pointer
;
4989 expression (&count_exp
);
4991 if (count_exp
.X_op
!= O_constant
4992 || count_exp
.X_add_number
<= 0)
4993 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4995 count
= count_exp
.X_add_number
;
4999 while (--count
>= 0)
5001 p
= frag_more (length
);
5002 memcpy (p
, temp
, (unsigned int) length
);
5007 while (*input_line_pointer
++ == ',');
5009 /* Put terminator back into stream. */
5010 --input_line_pointer
;
5011 demand_empty_rest_of_line ();
5016 Note - we are using the DWARF standard's definition of LEB128 encoding
5017 where each 7-bit value is a stored in a byte, *not* an octet. This
5018 means that on targets where a byte contains multiple octets there is
5019 a *huge waste of space*. (This also means that we do not have to
5020 have special versions of these functions for when OCTETS_PER_BYTE_POWER
5023 If the 7-bit values were to be packed into N-bit bytes (where N > 8)
5024 we would then have to consider whether multiple, successive LEB128
5025 values should be packed into the bytes without padding (bad idea) or
5026 whether each LEB128 number is padded out to a whole number of bytes.
5027 Plus you have to decide on the endianness of packing octets into a
5030 /* Return the size of a LEB128 value in bytes. */
5032 static inline unsigned int
5033 sizeof_sleb128 (offsetT value
)
5040 byte
= (value
& 0x7f);
5041 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
5042 Fortunately, we can structure things so that the extra work reduces
5043 to a noop on systems that do things "properly". */
5044 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
5047 while (!(((value
== 0) && ((byte
& 0x40) == 0))
5048 || ((value
== -1) && ((byte
& 0x40) != 0))));
5053 static inline unsigned int
5054 sizeof_uleb128 (valueT value
)
5069 sizeof_leb128 (valueT value
, int sign
)
5072 return sizeof_sleb128 ((offsetT
) value
);
5074 return sizeof_uleb128 (value
);
5077 /* Output a LEB128 value. Returns the number of bytes used. */
5079 static inline unsigned int
5080 output_sleb128 (char *p
, offsetT value
)
5087 unsigned byte
= (value
& 0x7f);
5089 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
5090 Fortunately, we can structure things so that the extra work reduces
5091 to a noop on systems that do things "properly". */
5092 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
5094 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
5095 || ((value
== -1) && ((byte
& 0x40) != 0))));
5106 static inline unsigned int
5107 output_uleb128 (char *p
, valueT value
)
5113 unsigned byte
= (value
& 0x7f);
5117 /* More bytes to follow. */
5128 output_leb128 (char *p
, valueT value
, int sign
)
5131 return output_sleb128 (p
, (offsetT
) value
);
5133 return output_uleb128 (p
, value
);
5136 /* Do the same for bignums. We combine sizeof with output here in that
5137 we don't output for NULL values of P. It isn't really as critical as
5138 for "normal" values that this be streamlined. Returns the number of
5141 static inline unsigned int
5142 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
)
5149 /* Strip leading sign extensions off the bignum. */
5151 && bignum
[size
- 1] == LITTLENUM_MASK
5152 && bignum
[size
- 2] > LITTLENUM_MASK
/ 2)
5157 /* OR in the next part of the littlenum. */
5158 val
|= (*bignum
<< loaded
);
5159 loaded
+= LITTLENUM_NUMBER_OF_BITS
;
5163 /* Add bytes until there are less than 7 bits left in VAL
5164 or until every non-sign bit has been written. */
5171 || val
!= ((byte
& 0x40) == 0 ? 0 : ((valueT
) 1 << loaded
) - 1))
5178 while ((byte
& 0x80) != 0 && loaded
>= 7);
5182 /* Mop up any left-over bits (of which there will be less than 7). */
5183 if ((byte
& 0x80) != 0)
5185 /* Sign-extend VAL. */
5186 if (val
& (1 << (loaded
- 1)))
5187 val
|= ~0U << loaded
;
5196 static inline unsigned int
5197 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
)
5204 /* Strip leading zeros off the bignum. */
5205 /* XXX: Is this needed? */
5206 while (size
> 0 && bignum
[size
- 1] == 0)
5211 if (loaded
< 7 && size
> 0)
5213 val
|= (*bignum
<< loaded
);
5214 loaded
+= 8 * CHARS_PER_LITTLENUM
;
5223 if (size
> 0 || val
)
5230 while (byte
& 0x80);
5236 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
, int sign
)
5239 return output_big_sleb128 (p
, bignum
, size
);
5241 return output_big_uleb128 (p
, bignum
, size
);
5244 /* Generate the appropriate fragments for a given expression to emit a
5245 leb128 value. SIGN is 1 for sleb, 0 for uleb. */
5248 emit_leb128_expr (expressionS
*exp
, int sign
)
5250 operatorT op
= exp
->X_op
;
5251 unsigned int nbytes
;
5253 if (op
== O_absent
|| op
== O_illegal
)
5255 as_warn (_("zero assumed for missing expression"));
5256 exp
->X_add_number
= 0;
5259 else if (op
== O_big
&& exp
->X_add_number
<= 0)
5261 as_bad (_("floating point number invalid"));
5262 exp
->X_add_number
= 0;
5265 else if (op
== O_register
)
5267 as_warn (_("register value used as expression"));
5270 else if (op
== O_constant
5272 && (exp
->X_add_number
< 0) == !exp
->X_extrabit
)
5274 /* We're outputting a signed leb128 and the sign of X_add_number
5275 doesn't reflect the sign of the original value. Convert EXP
5276 to a correctly-extended bignum instead. */
5277 convert_to_bignum (exp
, exp
->X_extrabit
);
5281 if (now_seg
== absolute_section
)
5283 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
5284 as_bad (_("attempt to store value in absolute section"));
5285 abs_section_offset
++;
5289 if ((op
!= O_constant
|| exp
->X_add_number
!= 0) && in_bss ())
5290 as_bad (_("attempt to store non-zero value in section `%s'"),
5291 segment_name (now_seg
));
5293 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
5294 a signal that this is leb128 data. It shouldn't optimize this away. */
5295 nbytes
= (unsigned int) -1;
5296 if (check_eh_frame (exp
, &nbytes
))
5299 /* Let the backend know that subsequent data may be byte aligned. */
5300 #ifdef md_cons_align
5304 if (op
== O_constant
)
5306 /* If we've got a constant, emit the thing directly right now. */
5308 valueT value
= exp
->X_add_number
;
5312 size
= sizeof_leb128 (value
, sign
);
5313 p
= frag_more (size
);
5314 if (output_leb128 (p
, value
, sign
) > size
)
5317 else if (op
== O_big
)
5319 /* O_big is a different sort of constant. */
5324 size
= output_big_leb128 (NULL
, generic_bignum
, exp
->X_add_number
, sign
);
5325 p
= frag_more (size
);
5326 if (output_big_leb128 (p
, generic_bignum
, exp
->X_add_number
, sign
) > size
)
5331 /* Otherwise, we have to create a variable sized fragment and
5332 resolve things later. */
5334 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
5335 make_expr_symbol (exp
), 0, (char *) NULL
);
5339 /* Parse the .sleb128 and .uleb128 pseudos. */
5346 #ifdef md_flush_pending_output
5347 md_flush_pending_output ();
5353 emit_leb128_expr (&exp
, sign
);
5355 while (*input_line_pointer
++ == ',');
5357 input_line_pointer
--;
5358 demand_empty_rest_of_line ();
5362 stringer_append_char (int c
, int bitsize
)
5365 as_bad (_("attempt to store non-empty string in section `%s'"),
5366 segment_name (now_seg
));
5368 if (!target_big_endian
)
5369 FRAG_APPEND_1_CHAR (c
);
5374 FRAG_APPEND_1_CHAR (0);
5375 FRAG_APPEND_1_CHAR (0);
5376 FRAG_APPEND_1_CHAR (0);
5377 FRAG_APPEND_1_CHAR (0);
5380 FRAG_APPEND_1_CHAR (0);
5381 FRAG_APPEND_1_CHAR (0);
5384 FRAG_APPEND_1_CHAR (0);
5389 /* Called with invalid bitsize argument. */
5393 if (target_big_endian
)
5394 FRAG_APPEND_1_CHAR (c
);
5397 /* Worker to do .ascii etc statements.
5398 Reads 0 or more ',' separated, double-quoted strings.
5399 Caller should have checked need_pass_2 is FALSE because we don't
5401 Checks for end-of-line.
5402 BITS_APPENDZERO says how many bits are in a target char.
5403 The bottom bit is set if a NUL char should be appended to the strings. */
5406 stringer (int bits_appendzero
)
5408 const int bitsize
= bits_appendzero
& ~7;
5409 const int append_zero
= bits_appendzero
& 1;
5411 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5415 #ifdef md_flush_pending_output
5416 md_flush_pending_output ();
5419 #ifdef md_cons_align
5423 /* If we have been switched into the abs_section then we
5424 will not have an obstack onto which we can hang strings. */
5425 if (now_seg
== absolute_section
)
5427 as_bad (_("strings must be placed into a section"));
5428 ignore_rest_of_line ();
5432 /* The following awkward logic is to parse ZERO or more strings,
5433 comma separated. Recall a string expression includes spaces
5434 before the opening '\"' and spaces after the closing '\"'.
5435 We fake a leading ',' if there is (supposed to be)
5436 a 1st, expression. We keep demanding expressions for each ','. */
5437 if (is_it_end_of_statement ())
5439 c
= 0; /* Skip loop. */
5440 ++input_line_pointer
; /* Compensate for end of loop. */
5444 c
= ','; /* Do loop. */
5447 while (c
== ',' || c
== '<' || c
== '"')
5450 switch (*input_line_pointer
)
5453 ++input_line_pointer
; /*->1st char of string. */
5454 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5455 start
= input_line_pointer
;
5458 while (is_a_char (c
= next_char_of_string ()))
5459 stringer_append_char (c
, bitsize
);
5462 stringer_append_char (0, bitsize
);
5464 know (input_line_pointer
[-1] == '\"');
5466 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5467 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
5468 will emit .string with a filename in the .debug section
5469 after a sequence of constants. See the comment in
5470 emit_expr for the sequence. emit_expr will set
5471 dwarf_file_string to non-zero if this string might be a
5472 source file name. */
5473 if (strcmp (segment_name (now_seg
), ".debug") != 0)
5474 dwarf_file_string
= 0;
5475 else if (dwarf_file_string
)
5477 c
= input_line_pointer
[-1];
5478 input_line_pointer
[-1] = '\0';
5479 listing_source_file (start
);
5480 input_line_pointer
[-1] = c
;
5486 input_line_pointer
++;
5487 c
= get_single_number ();
5488 stringer_append_char (c
, bitsize
);
5489 if (*input_line_pointer
!= '>')
5490 as_bad (_("expected <nn>"));
5492 input_line_pointer
++;
5495 input_line_pointer
++;
5499 c
= *input_line_pointer
;
5502 demand_empty_rest_of_line ();
5505 /* FIXME-SOMEDAY: I had trouble here on characters with the
5506 high bits set. We'll probably also have trouble with
5507 multibyte chars, wide chars, etc. Also be careful about
5508 returning values bigger than 1 byte. xoxorich. */
5511 next_char_of_string (void)
5515 c
= *input_line_pointer
++ & CHAR_MASK
;
5523 as_warn (_("unterminated string; newline inserted"));
5524 bump_line_counters ();
5527 #ifndef NO_STRING_ESCAPES
5529 switch (c
= *input_line_pointer
++ & CHAR_MASK
)
5557 break; /* As itself. */
5573 for (i
= 0, number
= 0;
5574 ISDIGIT (c
) && i
< 3;
5575 c
= *input_line_pointer
++, i
++)
5577 number
= number
* 8 + c
- '0';
5580 c
= number
& CHAR_MASK
;
5582 --input_line_pointer
;
5591 c
= *input_line_pointer
++;
5592 while (ISXDIGIT (c
))
5595 number
= number
* 16 + c
- '0';
5596 else if (ISUPPER (c
))
5597 number
= number
* 16 + c
- 'A' + 10;
5599 number
= number
* 16 + c
- 'a' + 10;
5600 c
= *input_line_pointer
++;
5602 c
= number
& CHAR_MASK
;
5603 --input_line_pointer
;
5608 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
5609 as_warn (_("unterminated string; newline inserted"));
5611 bump_line_counters ();
5616 #ifdef ONLY_STANDARD_ESCAPES
5617 as_bad (_("bad escaped character in string"));
5619 #endif /* ONLY_STANDARD_ESCAPES */
5624 #endif /* ! defined (NO_STRING_ESCAPES) */
5633 get_segmented_expression (expressionS
*expP
)
5637 retval
= expression (expP
);
5638 if (expP
->X_op
== O_illegal
5639 || expP
->X_op
== O_absent
5640 || expP
->X_op
== O_big
)
5642 as_bad (_("expected address expression"));
5643 expP
->X_op
= O_constant
;
5644 expP
->X_add_number
= 0;
5645 retval
= absolute_section
;
5651 get_known_segmented_expression (expressionS
*expP
)
5653 segT retval
= get_segmented_expression (expP
);
5655 if (retval
== undefined_section
)
5657 /* There is no easy way to extract the undefined symbol from the
5659 if (expP
->X_add_symbol
!= NULL
5660 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
5661 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5662 S_GET_NAME (expP
->X_add_symbol
));
5664 as_warn (_("some symbol undefined; zero assumed"));
5665 retval
= absolute_section
;
5666 expP
->X_op
= O_constant
;
5667 expP
->X_add_number
= 0;
5672 char /* Return terminator. */
5673 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
5675 /* FIXME: val_pointer should probably be offsetT *. */
5676 *val_pointer
= (long) get_absolute_expression ();
5677 return (*input_line_pointer
++);
5680 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
5681 Give a warning if that happens. */
5684 demand_copy_C_string (int *len_pointer
)
5688 if ((s
= demand_copy_string (len_pointer
)) != 0)
5692 for (len
= *len_pointer
; len
> 0; len
--)
5699 as_bad (_("this string may not contain \'\\0\'"));
5707 /* Demand string, but return a safe (=private) copy of the string.
5708 Return NULL if we can't read a string here. */
5711 demand_copy_string (int *lenP
)
5719 if (*input_line_pointer
== '\"')
5721 input_line_pointer
++; /* Skip opening quote. */
5723 while (is_a_char (c
= next_char_of_string ()))
5725 obstack_1grow (¬es
, c
);
5728 /* JF this next line is so demand_copy_C_string will return a
5729 null terminated string. */
5730 obstack_1grow (¬es
, '\0');
5731 retval
= (char *) obstack_finish (¬es
);
5735 as_bad (_("missing string"));
5737 ignore_rest_of_line ();
5743 /* In: Input_line_pointer->next character.
5745 Do: Skip input_line_pointer over all whitespace.
5747 Out: 1 if input_line_pointer->end-of-line. */
5750 is_it_end_of_statement (void)
5753 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
5757 equals (char *sym_name
, int reassign
)
5762 input_line_pointer
++;
5763 if (*input_line_pointer
== '=')
5764 input_line_pointer
++;
5765 if (reassign
< 0 && *input_line_pointer
== '=')
5766 input_line_pointer
++;
5768 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
5769 input_line_pointer
++;
5772 stop
= mri_comment_field (&stopc
);
5774 assign_symbol (sym_name
, reassign
>= 0 ? !reassign
: reassign
);
5778 demand_empty_rest_of_line ();
5779 mri_comment_end (stop
, stopc
);
5783 /* .incbin -- include a file verbatim at the current location. */
5786 s_incbin (int x ATTRIBUTE_UNUSED
)
5797 #ifdef md_flush_pending_output
5798 md_flush_pending_output ();
5801 #ifdef md_cons_align
5806 filename
= demand_copy_string (& len
);
5807 if (filename
== NULL
)
5812 /* Look for optional skip and count. */
5813 if (* input_line_pointer
== ',')
5815 ++ input_line_pointer
;
5816 skip
= get_absolute_expression ();
5820 if (* input_line_pointer
== ',')
5822 ++ input_line_pointer
;
5824 count
= get_absolute_expression ();
5826 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
5832 demand_empty_rest_of_line ();
5834 /* Try opening absolute path first, then try include dirs. */
5835 binfile
= fopen (filename
, FOPEN_RB
);
5836 if (binfile
== NULL
)
5840 path
= (char *) xmalloc ((unsigned long) len
+ include_dir_maxlen
+ 5);
5842 for (i
= 0; i
< include_dir_count
; i
++)
5844 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
5846 binfile
= fopen (path
, FOPEN_RB
);
5847 if (binfile
!= NULL
)
5851 if (binfile
== NULL
)
5852 as_bad (_("file not found: %s"), filename
);
5855 path
= xstrdup (filename
);
5861 register_dependency (path
);
5863 /* Compute the length of the file. */
5864 if (fseek (binfile
, 0, SEEK_END
) != 0)
5866 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
5869 file_len
= ftell (binfile
);
5871 /* If a count was not specified use the remainder of the file. */
5873 count
= file_len
- skip
;
5875 if (skip
< 0 || count
< 0 || file_len
< 0 || skip
+ count
> file_len
)
5877 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5878 skip
, count
, file_len
);
5882 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
5884 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
5888 /* Allocate frag space and store file contents in it. */
5889 binfrag
= frag_more (count
);
5891 bytes
= fread (binfrag
, 1, count
, binfile
);
5893 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5894 path
, bytes
, count
);
5897 if (binfile
!= NULL
)
5903 /* .include -- include a file at this point. */
5906 s_include (int arg ATTRIBUTE_UNUSED
)
5915 filename
= demand_copy_string (&i
);
5916 if (filename
== NULL
)
5918 /* demand_copy_string has already printed an error and
5919 called ignore_rest_of_line. */
5927 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
5928 && *input_line_pointer
!= ' '
5929 && *input_line_pointer
!= '\t')
5931 obstack_1grow (¬es
, *input_line_pointer
);
5932 ++input_line_pointer
;
5936 obstack_1grow (¬es
, '\0');
5937 filename
= (char *) obstack_finish (¬es
);
5938 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5939 ++input_line_pointer
;
5942 demand_empty_rest_of_line ();
5943 path
= (char *) xmalloc ((unsigned long) i
5944 + include_dir_maxlen
+ 5 /* slop */ );
5946 for (i
= 0; i
< include_dir_count
; i
++)
5948 strcpy (path
, include_dirs
[i
]);
5950 strcat (path
, filename
);
5951 if (0 != (try_file
= fopen (path
, FOPEN_RT
)))
5961 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5962 register_dependency (path
);
5963 input_scrub_insert_file (path
);
5967 add_include_dir (char *path
)
5971 if (include_dir_count
== 0)
5973 include_dirs
= (char **) xmalloc (2 * sizeof (*include_dirs
));
5974 include_dirs
[0] = "."; /* Current dir. */
5975 include_dir_count
= 2;
5979 include_dir_count
++;
5981 (char **) xrealloc (include_dirs
,
5982 include_dir_count
* sizeof (*include_dirs
));
5985 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
5988 if (i
> include_dir_maxlen
)
5989 include_dir_maxlen
= i
;
5992 /* Output debugging information to denote the source file. */
5995 generate_file_debug (void)
5997 if (debug_type
== DEBUG_STABS
)
5998 stabs_generate_asm_file ();
6001 /* Output line number debugging information for the current source line. */
6004 generate_lineno_debug (void)
6008 case DEBUG_UNSPECIFIED
:
6013 stabs_generate_asm_lineno ();
6016 ecoff_generate_asm_lineno ();
6019 /* ??? We could here indicate to dwarf2dbg.c that something
6020 has changed. However, since there is additional backend
6021 support that is required (calling dwarf2_emit_insn), we
6022 let dwarf2dbg.c call as_where on its own. */
6027 /* Output debugging information to mark a function entry point or end point.
6028 END_P is zero for .func, and non-zero for .endfunc. */
6033 do_s_func (end_p
, NULL
);
6036 /* Subroutine of s_func so targets can choose a different default prefix.
6037 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
6040 do_s_func (int end_p
, const char *default_prefix
)
6042 /* Record the current function so that we can issue an error message for
6043 misplaced .func,.endfunc, and also so that .endfunc needs no
6045 static char *current_name
;
6046 static char *current_label
;
6050 if (current_name
== NULL
)
6052 as_bad (_("missing .func"));
6053 ignore_rest_of_line ();
6057 if (debug_type
== DEBUG_STABS
)
6058 stabs_generate_asm_endfunc (current_name
, current_label
);
6060 current_name
= current_label
= NULL
;
6065 char delim1
, delim2
;
6067 if (current_name
!= NULL
)
6069 as_bad (_(".endfunc missing for previous .func"));
6070 ignore_rest_of_line ();
6074 delim1
= get_symbol_name (& name
);
6075 name
= xstrdup (name
);
6076 *input_line_pointer
= delim1
;
6077 SKIP_WHITESPACE_AFTER_NAME ();
6078 if (*input_line_pointer
!= ',')
6082 if (asprintf (&label
, "%s%s", default_prefix
, name
) == -1)
6083 as_fatal ("%s", xstrerror (errno
));
6087 char leading_char
= bfd_get_symbol_leading_char (stdoutput
);
6088 /* Missing entry point, use function's name with the leading
6092 if (asprintf (&label
, "%c%s", leading_char
, name
) == -1)
6093 as_fatal ("%s", xstrerror (errno
));
6101 ++input_line_pointer
;
6103 delim2
= get_symbol_name (& label
);
6104 label
= xstrdup (label
);
6105 restore_line_pointer (delim2
);
6108 if (debug_type
== DEBUG_STABS
)
6109 stabs_generate_asm_func (name
, label
);
6111 current_name
= name
;
6112 current_label
= label
;
6115 demand_empty_rest_of_line ();
6118 #ifdef HANDLE_BUNDLE
6121 s_bundle_align_mode (int arg ATTRIBUTE_UNUSED
)
6123 unsigned int align
= get_absolute_expression ();
6125 demand_empty_rest_of_line ();
6127 if (align
> (unsigned int) TC_ALIGN_LIMIT
)
6128 as_fatal (_(".bundle_align_mode alignment too large (maximum %u)"),
6129 (unsigned int) TC_ALIGN_LIMIT
);
6131 if (bundle_lock_frag
!= NULL
)
6133 as_bad (_("cannot change .bundle_align_mode inside .bundle_lock"));
6137 bundle_align_p2
= align
;
6141 s_bundle_lock (int arg ATTRIBUTE_UNUSED
)
6143 demand_empty_rest_of_line ();
6145 if (bundle_align_p2
== 0)
6147 as_bad (_(".bundle_lock is meaningless without .bundle_align_mode"));
6151 if (bundle_lock_depth
== 0)
6153 bundle_lock_frchain
= frchain_now
;
6154 bundle_lock_frag
= start_bundle ();
6156 ++bundle_lock_depth
;
6160 s_bundle_unlock (int arg ATTRIBUTE_UNUSED
)
6164 demand_empty_rest_of_line ();
6166 if (bundle_lock_frag
== NULL
)
6168 as_bad (_(".bundle_unlock without preceding .bundle_lock"));
6172 gas_assert (bundle_align_p2
> 0);
6174 gas_assert (bundle_lock_depth
> 0);
6175 if (--bundle_lock_depth
> 0)
6178 size
= pending_bundle_size (bundle_lock_frag
);
6180 if (size
> (1U << bundle_align_p2
))
6181 as_bad (_(".bundle_lock sequence is %u bytes, but bundle size only %u"),
6182 size
, 1 << bundle_align_p2
);
6184 finish_bundle (bundle_lock_frag
, size
);
6186 bundle_lock_frag
= NULL
;
6187 bundle_lock_frchain
= NULL
;
6190 #endif /* HANDLE_BUNDLE */
6193 s_ignore (int arg ATTRIBUTE_UNUSED
)
6195 ignore_rest_of_line ();
6199 read_print_statistics (FILE *file
)
6201 hash_print_statistics (file
, "pseudo-op table", po_hash
);
6204 /* Inserts the given line into the input stream.
6206 This call avoids macro/conditionals nesting checking, since the contents of
6207 the line are assumed to replace the contents of a line already scanned.
6209 An appropriate use of this function would be substitution of input lines when
6210 called by md_start_line_hook(). The given line is assumed to already be
6211 properly scrubbed. */
6214 input_scrub_insert_line (const char *line
)
6217 size_t len
= strlen (line
);
6218 sb_build (&newline
, len
);
6219 sb_add_buffer (&newline
, line
, len
);
6220 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
6222 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
6225 /* Insert a file into the input stream; the path must resolve to an actual
6226 file; no include path searching or dependency registering is performed. */
6229 input_scrub_insert_file (char *path
)
6231 input_scrub_include_file (path
, input_line_pointer
);
6232 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
6235 /* Find the end of a line, considering quotation and escaping of quotes. */
6237 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
6238 # define TC_SINGLE_QUOTE_STRINGS 1
6242 _find_end_of_line (char *s
, int mri_string
, int insn ATTRIBUTE_UNUSED
,
6245 char inquote
= '\0';
6248 while (!is_end_of_line
[(unsigned char) *s
]
6249 || (inquote
&& !ISCNTRL (*s
))
6250 || (inquote
== '\'' && flag_mri
)
6251 #ifdef TC_EOL_IN_INSN
6252 || (insn
&& TC_EOL_IN_INSN (s
))
6254 /* PR 6926: When we are parsing the body of a macro the sequence
6255 \@ is special - it refers to the invocation count. If the @
6256 character happens to be registered as a line-separator character
6257 by the target, then the is_end_of_line[] test above will have
6258 returned true, but we need to ignore the line separating
6259 semantics in this particular case. */
6260 || (in_macro
&& inescape
&& *s
== '@')
6263 if (mri_string
&& *s
== '\'')
6267 else if (*s
== '\\')
6271 #ifdef TC_SINGLE_QUOTE_STRINGS
6272 || (TC_SINGLE_QUOTE_STRINGS
&& *s
== '\'')
6279 as_warn (_("missing closing `%c'"), inquote
);
6280 if (inescape
&& !ignore_input ())
6281 as_warn (_("stray `\\'"));
6286 find_end_of_line (char *s
, int mri_string
)
6288 return _find_end_of_line (s
, mri_string
, 0, 0);