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 *input_line_pointer
++ = nul_char
;
1181 /* We resume loop AFTER the end-of-line from
1182 this instruction. */
1188 /* Empty statement? */
1189 if (is_end_of_line
[(unsigned char) next_char
])
1192 if ((LOCAL_LABELS_DOLLAR
|| LOCAL_LABELS_FB
) && ISDIGIT (next_char
))
1194 /* local label ("4:") */
1195 char *backup
= input_line_pointer
;
1197 HANDLE_CONDITIONAL_ASSEMBLY (1);
1199 temp
= next_char
- '0';
1201 if (nul_char
== '"')
1202 ++ input_line_pointer
;
1204 /* Read the whole number. */
1205 while (ISDIGIT (*input_line_pointer
))
1207 temp
= (temp
* 10) + *input_line_pointer
- '0';
1208 ++input_line_pointer
;
1211 if (LOCAL_LABELS_DOLLAR
1212 && *input_line_pointer
== '$'
1213 && *(input_line_pointer
+ 1) == ':')
1215 input_line_pointer
+= 2;
1217 if (dollar_label_defined (temp
))
1219 as_fatal (_("label \"%d$\" redefined"), temp
);
1222 define_dollar_label (temp
);
1223 colon (dollar_label_name (temp
, 0));
1228 && *input_line_pointer
++ == ':')
1230 fb_label_instance_inc (temp
);
1231 colon (fb_label_name (temp
, 0));
1235 input_line_pointer
= backup
;
1238 if (next_char
&& strchr (line_comment_chars
, next_char
))
1239 { /* Its a comment. Better say APP or NO_APP. */
1244 unsigned int new_length
;
1247 s
= input_line_pointer
;
1248 if (strncmp (s
, "APP\n", 4))
1251 ignore_rest_of_line ();
1254 bump_line_counters ();
1257 ends
= strstr (s
, "#NO_APP\n");
1261 unsigned int tmp_len
;
1264 /* The end of the #APP wasn't in this buffer. We
1265 keep reading in buffers until we find the #NO_APP
1266 that goes with this #APP There is one. The specs
1268 tmp_len
= buffer_limit
- s
;
1269 tmp_buf
= (char *) xmalloc (tmp_len
+ 1);
1270 memcpy (tmp_buf
, s
, tmp_len
);
1273 new_tmp
= input_scrub_next_buffer (&buffer
);
1277 buffer_limit
= new_tmp
;
1278 input_line_pointer
= buffer
;
1279 ends
= strstr (buffer
, "#NO_APP\n");
1281 num
= ends
- buffer
;
1283 num
= buffer_limit
- buffer
;
1285 tmp_buf
= (char *) xrealloc (tmp_buf
, tmp_len
+ num
);
1286 memcpy (tmp_buf
+ tmp_len
, buffer
, num
);
1291 input_line_pointer
= ends
? ends
+ 8 : NULL
;
1299 input_line_pointer
= ends
+ 8;
1303 scrub_string_end
= ends
;
1305 new_length
= ends
- s
;
1306 new_buf
= (char *) xmalloc (new_length
);
1313 space
= (new_buf
+ new_length
) - new_tmp
;
1314 size
= do_scrub_chars (scrub_from_string
, new_tmp
, space
);
1322 new_buf
= (char *) xrealloc (new_buf
, new_length
+ 100);
1323 new_tmp
= new_buf
+ new_length
;
1330 /* We've "scrubbed" input to the preferred format. In the
1331 process we may have consumed the whole of the remaining
1332 file (and included files). We handle this formatted
1333 input similar to that of macro expansion, letting
1334 actual macro expansion (possibly nested) and other
1335 input expansion work. Beware that in messages, line
1336 numbers and possibly file names will be incorrect. */
1337 new_length
= strlen (new_buf
);
1338 sb_build (&sbuf
, new_length
);
1339 sb_add_buffer (&sbuf
, new_buf
, new_length
);
1340 input_scrub_include_sb (&sbuf
, input_line_pointer
, 0);
1342 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1347 HANDLE_CONDITIONAL_ASSEMBLY (1);
1349 #ifdef tc_unrecognized_line
1350 if (tc_unrecognized_line (next_char
))
1353 input_line_pointer
--;
1354 /* Report unknown char as error. */
1355 demand_empty_rest_of_line ();
1360 symbol_set_value_now (&dot_symbol
);
1362 #ifdef HANDLE_BUNDLE
1363 if (bundle_lock_frag
!= NULL
)
1365 as_bad_where (bundle_lock_frag
->fr_file
, bundle_lock_frag
->fr_line
,
1366 _(".bundle_lock with no matching .bundle_unlock"));
1367 bundle_lock_frag
= NULL
;
1368 bundle_lock_frchain
= NULL
;
1369 bundle_lock_depth
= 0;
1376 /* Close the input file. */
1377 input_scrub_close ();
1378 #ifdef WARN_COMMENTS
1380 if (warn_comment
&& found_comment
)
1381 as_warn_where (found_comment_file
, found_comment
,
1382 "first comment found here");
1387 /* Convert O_constant expression EXP into the equivalent O_big representation.
1388 Take the sign of the number from SIGN rather than X_add_number. */
1391 convert_to_bignum (expressionS
*exp
, int sign
)
1396 value
= exp
->X_add_number
;
1397 for (i
= 0; i
< sizeof (exp
->X_add_number
) / CHARS_PER_LITTLENUM
; i
++)
1399 generic_bignum
[i
] = value
& LITTLENUM_MASK
;
1400 value
>>= LITTLENUM_NUMBER_OF_BITS
;
1402 /* Add a sequence of sign bits if the top bit of X_add_number is not
1403 the sign of the original value. */
1404 if ((exp
->X_add_number
< 0) == !sign
)
1405 generic_bignum
[i
++] = sign
? LITTLENUM_MASK
: 0;
1407 exp
->X_add_number
= i
;
1410 /* For most MRI pseudo-ops, the line actually ends at the first
1411 nonquoted space. This function looks for that point, stuffs a null
1412 in, and sets *STOPCP to the character that used to be there, and
1413 returns the location.
1415 Until I hear otherwise, I am going to assume that this is only true
1416 for the m68k MRI assembler. */
1419 mri_comment_field (char *stopcp
)
1425 know (flag_m68k_mri
);
1427 for (s
= input_line_pointer
;
1428 ((!is_end_of_line
[(unsigned char) *s
] && *s
!= ' ' && *s
!= '\t')
1436 for (s
= input_line_pointer
;
1437 !is_end_of_line
[(unsigned char) *s
];
1447 /* Skip to the end of an MRI comment field. */
1450 mri_comment_end (char *stop
, int stopc
)
1454 input_line_pointer
= stop
;
1456 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1457 ++input_line_pointer
;
1461 s_abort (int ignore ATTRIBUTE_UNUSED
)
1463 as_fatal (_(".abort detected. Abandoning ship."));
1466 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1467 (in bytes). A negative ARG is the negative of the length of the
1468 fill pattern. BYTES_P is non-zero if the alignment value should be
1469 interpreted as the byte boundary, rather than the power of 2. */
1470 #ifndef TC_ALIGN_LIMIT
1471 #define TC_ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1475 s_align (signed int arg
, int bytes_p
)
1477 unsigned int align_limit
= TC_ALIGN_LIMIT
;
1486 stop
= mri_comment_field (&stopc
);
1488 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1493 align
= arg
; /* Default value from pseudo-op table. */
1497 align
= get_absolute_expression ();
1500 #ifdef TC_ALIGN_ZERO_IS_DEFAULT
1501 if (arg
> 0 && align
== 0)
1508 /* Convert to a power of 2. */
1513 for (i
= 0; (align
& 1) == 0; align
>>= 1, ++i
)
1516 as_bad (_("alignment not a power of 2"));
1522 if (align
> align_limit
)
1524 align
= align_limit
;
1525 as_warn (_("alignment too large: %u assumed"), align
);
1528 if (*input_line_pointer
!= ',')
1535 ++input_line_pointer
;
1536 if (*input_line_pointer
== ',')
1540 fill
= get_absolute_expression ();
1545 if (*input_line_pointer
!= ',')
1549 ++input_line_pointer
;
1550 max
= get_absolute_expression ();
1557 as_warn (_("expected fill pattern missing"));
1558 do_align (align
, (char *) NULL
, 0, max
);
1562 unsigned int fill_len
;
1574 do_align (align
, &fill_char
, fill_len
, max
);
1580 if ((size_t) fill_len
> sizeof ab
)
1582 as_warn (_("fill pattern too long, truncating to %u"),
1583 (unsigned) sizeof ab
);
1584 fill_len
= sizeof ab
;
1587 md_number_to_chars (ab
, fill
, fill_len
);
1588 do_align (align
, ab
, fill_len
, max
);
1592 demand_empty_rest_of_line ();
1595 mri_comment_end (stop
, stopc
);
1598 /* Handle the .align pseudo-op on machines where ".align 4" means
1599 align to a 4 byte boundary. */
1602 s_align_bytes (int arg
)
1607 /* Handle the .align pseudo-op on machines where ".align 4" means align
1608 to a 2**4 boundary. */
1611 s_align_ptwo (int arg
)
1616 /* Switch in and out of alternate macro mode. */
1621 demand_empty_rest_of_line ();
1622 macro_set_alternate (on
);
1625 /* Read a symbol name from input_line_pointer.
1627 Stores the symbol name in a buffer and returns a pointer to this buffer.
1628 The buffer is xalloc'ed. It is the caller's responsibility to free
1631 The name is not left in the i_l_p buffer as it may need processing
1632 to handle escape characters.
1634 Advances i_l_p to the next non-whitespace character.
1636 If a symbol name could not be read, the routine issues an error
1637 messages, skips to the end of the line and returns NULL. */
1640 read_symbol_name (void)
1646 c
= *input_line_pointer
++;
1650 #define SYM_NAME_CHUNK_LEN 128
1651 ptrdiff_t len
= SYM_NAME_CHUNK_LEN
;
1655 start
= name
= xmalloc (len
+ 1);
1657 name_end
= name
+ SYM_NAME_CHUNK_LEN
;
1659 while (is_a_char (C
= next_char_of_string ()))
1661 if (name
>= name_end
)
1665 sofar
= name
- start
;
1666 len
+= SYM_NAME_CHUNK_LEN
;
1667 start
= xrealloc (start
, len
+ 1);
1668 name_end
= start
+ len
;
1669 name
= start
+ sofar
;
1676 /* Since quoted symbol names can contain non-ASCII characters,
1677 check the string and warn if it cannot be recognised by the
1678 current character set. */
1679 if (mbstowcs (NULL
, name
, len
) == (size_t) -1)
1680 as_warn (_("symbol name not recognised in the current locale"));
1682 else if (is_name_beginner (c
) || c
== '\001')
1686 name
= input_line_pointer
- 1;
1688 /* We accept \001 in a name in case this is
1689 being called with a constructed string. */
1690 while (is_part_of_name (c
= *input_line_pointer
++)
1694 len
= (input_line_pointer
- name
) - 1;
1695 start
= xmalloc (len
+ 1);
1697 memcpy (start
, name
, len
);
1700 /* Skip a name ender char if one is present. */
1701 if (! is_name_ender (c
))
1702 --input_line_pointer
;
1705 name
= start
= NULL
;
1709 as_bad (_("expected symbol name"));
1710 ignore_rest_of_line ();
1721 s_comm_internal (int param
,
1722 symbolS
*(*comm_parse_extra
) (int, symbolS
*, addressT
))
1726 symbolS
*symbolP
= NULL
;
1732 stop
= mri_comment_field (&stopc
);
1734 if ((name
= read_symbol_name ()) == NULL
)
1737 /* Accept an optional comma after the name. The comma used to be
1738 required, but Irix 5 cc does not generate it for .lcomm. */
1739 if (*input_line_pointer
== ',')
1740 input_line_pointer
++;
1742 temp
= get_absolute_expr (&exp
);
1744 size
&= ((addressT
) 2 << (stdoutput
->arch_info
->bits_per_address
- 1)) - 1;
1745 if (exp
.X_op
== O_absent
)
1747 as_bad (_("missing size expression"));
1748 ignore_rest_of_line ();
1751 else if (temp
!= size
|| !exp
.X_unsigned
)
1753 as_warn (_("size (%ld) out of range, ignored"), (long) temp
);
1754 ignore_rest_of_line ();
1758 symbolP
= symbol_find_or_make (name
);
1759 if ((S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
1760 && !S_IS_COMMON (symbolP
))
1762 if (!S_IS_VOLATILE (symbolP
))
1765 as_bad (_("symbol `%s' is already defined"), name
);
1766 ignore_rest_of_line ();
1769 symbolP
= symbol_clone (symbolP
, 1);
1770 S_SET_SEGMENT (symbolP
, undefined_section
);
1771 S_SET_VALUE (symbolP
, 0);
1772 symbol_set_frag (symbolP
, &zero_address_frag
);
1773 S_CLEAR_VOLATILE (symbolP
);
1776 size
= S_GET_VALUE (symbolP
);
1779 else if (size
!= temp
)
1780 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1781 name
, (long) size
, (long) temp
);
1783 if (comm_parse_extra
!= NULL
)
1784 symbolP
= (*comm_parse_extra
) (param
, symbolP
, size
);
1787 S_SET_VALUE (symbolP
, (valueT
) size
);
1788 S_SET_EXTERNAL (symbolP
);
1789 S_SET_SEGMENT (symbolP
, bfd_com_section_ptr
);
1792 demand_empty_rest_of_line ();
1795 mri_comment_end (stop
, stopc
);
1804 s_comm_internal (ignore
, NULL
);
1807 /* The MRI COMMON pseudo-op. We handle this by creating a common
1808 symbol with the appropriate name. We make s_space do the right
1809 thing by increasing the size. */
1812 s_mri_common (int small ATTRIBUTE_UNUSED
)
1828 stop
= mri_comment_field (&stopc
);
1832 name
= input_line_pointer
;
1833 if (!ISDIGIT (*name
))
1834 c
= get_symbol_name (& name
);
1839 ++input_line_pointer
;
1841 while (ISDIGIT (*input_line_pointer
));
1843 c
= *input_line_pointer
;
1844 *input_line_pointer
= '\0';
1846 if (line_label
!= NULL
)
1848 alc
= (char *) xmalloc (strlen (S_GET_NAME (line_label
))
1849 + (input_line_pointer
- name
)
1851 sprintf (alc
, "%s%s", name
, S_GET_NAME (line_label
));
1856 sym
= symbol_find_or_make (name
);
1857 c
= restore_line_pointer (c
);
1861 if (*input_line_pointer
!= ',')
1865 ++input_line_pointer
;
1866 align
= get_absolute_expression ();
1869 if (S_IS_DEFINED (sym
) && !S_IS_COMMON (sym
))
1871 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym
));
1872 ignore_rest_of_line ();
1873 mri_comment_end (stop
, stopc
);
1877 S_SET_EXTERNAL (sym
);
1878 S_SET_SEGMENT (sym
, bfd_com_section_ptr
);
1879 mri_common_symbol
= sym
;
1883 S_SET_ALIGN (sym
, align
);
1888 if (line_label
!= NULL
)
1891 exp
.X_op
= O_symbol
;
1892 exp
.X_add_symbol
= sym
;
1893 exp
.X_add_number
= 0;
1894 symbol_set_value_expression (line_label
, &exp
);
1895 symbol_set_frag (line_label
, &zero_address_frag
);
1896 S_SET_SEGMENT (line_label
, expr_section
);
1899 /* FIXME: We just ignore the small argument, which distinguishes
1900 COMMON and COMMON.S. I don't know what we can do about it. */
1902 /* Ignore the type and hptype. */
1903 if (*input_line_pointer
== ',')
1904 input_line_pointer
+= 2;
1905 if (*input_line_pointer
== ',')
1906 input_line_pointer
+= 2;
1908 demand_empty_rest_of_line ();
1910 mri_comment_end (stop
, stopc
);
1914 s_data (int ignore ATTRIBUTE_UNUSED
)
1919 temp
= get_absolute_expression ();
1920 if (flag_readonly_data_in_text
)
1922 section
= text_section
;
1926 section
= data_section
;
1928 subseg_set (section
, (subsegT
) temp
);
1930 demand_empty_rest_of_line ();
1933 /* Handle the .appfile pseudo-op. This is automatically generated by
1934 do_scrub_chars when a preprocessor # line comment is seen with a
1935 file name. This default definition may be overridden by the object
1936 or CPU specific pseudo-ops. This function is also the default
1937 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1941 s_app_file_string (char *file
, int appfile ATTRIBUTE_UNUSED
)
1945 listing_source_file (file
);
1947 register_dependency (file
);
1949 obj_app_file (file
, appfile
);
1954 s_app_file (int appfile
)
1959 /* Some assemblers tolerate immediately following '"'. */
1960 if ((s
= demand_copy_string (&length
)) != 0)
1963 = (!new_logical_line_flags (s
, -1, 1) && appfile
);
1965 /* In MRI mode, the preprocessor may have inserted an extraneous
1968 && *input_line_pointer
== '\''
1969 && is_end_of_line
[(unsigned char) input_line_pointer
[1]])
1970 ++input_line_pointer
;
1972 demand_empty_rest_of_line ();
1974 s_app_file_string (s
, appfile
);
1979 get_linefile_number (int *flag
)
1983 if (*input_line_pointer
< '0' || *input_line_pointer
> '9')
1986 *flag
= get_absolute_expression ();
1991 /* Handle the .appline pseudo-op. This is automatically generated by
1992 do_scrub_chars when a preprocessor # line comment is seen. This
1993 default definition may be overridden by the object or CPU specific
1997 s_app_line (int appline
)
2002 /* The given number is that of the next line. */
2004 l
= get_absolute_expression ();
2005 else if (!get_linefile_number (&l
))
2007 ignore_rest_of_line ();
2014 /* Some of the back ends can't deal with non-positive line numbers.
2015 Besides, it's silly. GCC however will generate a line number of
2016 zero when it is pre-processing builtins for assembler-with-cpp files:
2020 We do not want to barf on this, especially since such files are used
2021 in the GCC and GDB testsuites. So we check for negative line numbers
2022 rather than non-positive line numbers. */
2023 as_warn (_("line numbers must be positive; line number %d rejected"),
2034 if (*input_line_pointer
== '"')
2035 file
= demand_copy_string (&length
);
2041 while (get_linefile_number (&this_flag
))
2044 /* From GCC's cpp documentation:
2045 1: start of a new file.
2046 2: returning to a file after having included
2048 3: following text comes from a system header file.
2049 4: following text should be treated as extern "C".
2051 4 is nonsensical for the assembler; 3, we don't
2052 care about, so we ignore it just in case a
2053 system header file is included while
2054 preprocessing assembly. So 1 and 2 are all we
2055 care about, and they are mutually incompatible.
2056 new_logical_line_flags() demands this. */
2059 if (flags
&& flags
!= (1 << this_flag
))
2060 as_warn (_("incompatible flag %i in line directive"),
2063 flags
|= 1 << this_flag
;
2068 /* We ignore these. */
2072 as_warn (_("unsupported flag %i in line directive"),
2077 if (!is_end_of_line
[(unsigned char)*input_line_pointer
])
2082 if (appline
|| file
)
2084 new_logical_line_flags (file
, l
, flags
);
2087 listing_source_line (l
);
2091 if (appline
|| file
)
2092 demand_empty_rest_of_line ();
2094 ignore_rest_of_line ();
2097 /* Handle the .end pseudo-op. Actually, the real work is done in
2098 read_a_source_file. */
2101 s_end (int ignore ATTRIBUTE_UNUSED
)
2105 /* The MRI assembler permits the start symbol to follow .end,
2106 but we don't support that. */
2108 if (!is_end_of_line
[(unsigned char) *input_line_pointer
]
2109 && *input_line_pointer
!= '*'
2110 && *input_line_pointer
!= '!')
2111 as_warn (_("start address not supported"));
2115 /* Handle the .err pseudo-op. */
2118 s_err (int ignore ATTRIBUTE_UNUSED
)
2120 as_bad (_(".err encountered"));
2121 demand_empty_rest_of_line ();
2124 /* Handle the .error and .warning pseudo-ops. */
2130 /* The purpose for the conditional assignment is not to
2131 internationalize the directive itself, but that we need a
2132 self-contained message, one that can be passed like the
2133 demand_copy_C_string return value, and with no assumption on the
2134 location of the name of the directive within the message. */
2136 = (err
? _(".error directive invoked in source file")
2137 : _(".warning directive invoked in source file"));
2139 if (!is_it_end_of_statement ())
2141 if (*input_line_pointer
!= '\"')
2143 as_bad (_("%s argument must be a string"),
2144 err
? ".error" : ".warning");
2145 ignore_rest_of_line ();
2149 msg
= demand_copy_C_string (&len
);
2157 as_warn ("%s", msg
);
2158 demand_empty_rest_of_line ();
2161 /* Handle the MRI fail pseudo-op. */
2164 s_fail (int ignore ATTRIBUTE_UNUSED
)
2171 stop
= mri_comment_field (&stopc
);
2173 temp
= get_absolute_expression ();
2175 as_warn (_(".fail %ld encountered"), (long) temp
);
2177 as_bad (_(".fail %ld encountered"), (long) temp
);
2179 demand_empty_rest_of_line ();
2182 mri_comment_end (stop
, stopc
);
2186 s_fill (int ignore ATTRIBUTE_UNUSED
)
2188 expressionS rep_exp
;
2193 #ifdef md_flush_pending_output
2194 md_flush_pending_output ();
2197 #ifdef md_cons_align
2201 get_known_segmented_expression (&rep_exp
);
2202 if (*input_line_pointer
== ',')
2204 input_line_pointer
++;
2205 size
= get_absolute_expression ();
2206 if (*input_line_pointer
== ',')
2208 input_line_pointer
++;
2209 fill
= get_absolute_expression ();
2213 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
2214 #define BSD_FILL_SIZE_CROCK_8 (8)
2215 if (size
> BSD_FILL_SIZE_CROCK_8
)
2217 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8
);
2218 size
= BSD_FILL_SIZE_CROCK_8
;
2222 as_warn (_("size negative; .fill ignored"));
2225 else if (rep_exp
.X_op
== O_constant
&& rep_exp
.X_add_number
<= 0)
2227 if (rep_exp
.X_add_number
< 0)
2228 as_warn (_("repeat < 0; .fill ignored"));
2232 if (size
&& !need_pass_2
)
2234 if (now_seg
== absolute_section
)
2236 if (rep_exp
.X_op
!= O_constant
)
2237 as_bad (_("non-constant fill count for absolute section"));
2238 else if (fill
&& rep_exp
.X_add_number
!= 0)
2239 as_bad (_("attempt to fill absolute section with non-zero value"));
2240 abs_section_offset
+= rep_exp
.X_add_number
* size
;
2243 && (rep_exp
.X_op
!= O_constant
|| rep_exp
.X_add_number
!= 0)
2245 as_bad (_("attempt to fill section `%s' with non-zero value"),
2246 segment_name (now_seg
));
2248 if (rep_exp
.X_op
== O_constant
)
2250 p
= frag_var (rs_fill
, (int) size
, (int) size
,
2251 (relax_substateT
) 0, (symbolS
*) 0,
2252 (offsetT
) rep_exp
.X_add_number
,
2257 /* We don't have a constant repeat count, so we can't use
2258 rs_fill. We can get the same results out of rs_space,
2259 but its argument is in bytes, so we must multiply the
2260 repeat count by size. */
2263 rep_sym
= make_expr_symbol (&rep_exp
);
2266 expressionS size_exp
;
2267 size_exp
.X_op
= O_constant
;
2268 size_exp
.X_add_number
= size
;
2270 rep_exp
.X_op
= O_multiply
;
2271 rep_exp
.X_add_symbol
= rep_sym
;
2272 rep_exp
.X_op_symbol
= make_expr_symbol (&size_exp
);
2273 rep_exp
.X_add_number
= 0;
2274 rep_sym
= make_expr_symbol (&rep_exp
);
2277 p
= frag_var (rs_space
, (int) size
, (int) size
,
2278 (relax_substateT
) 0, rep_sym
, (offsetT
) 0, (char *) 0);
2281 memset (p
, 0, (unsigned int) size
);
2283 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
2284 flavoured AS. The following bizarre behaviour is to be
2285 compatible with above. I guess they tried to take up to 8
2286 bytes from a 4-byte expression and they forgot to sign
2288 #define BSD_FILL_SIZE_CROCK_4 (4)
2289 md_number_to_chars (p
, (valueT
) fill
,
2290 (size
> BSD_FILL_SIZE_CROCK_4
2291 ? BSD_FILL_SIZE_CROCK_4
2293 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
2294 but emits no error message because it seems a legal thing to do.
2295 It is a degenerate case of .fill but could be emitted by a
2298 demand_empty_rest_of_line ();
2302 s_globl (int ignore ATTRIBUTE_UNUSED
)
2311 stop
= mri_comment_field (&stopc
);
2315 if ((name
= read_symbol_name ()) == NULL
)
2318 symbolP
= symbol_find_or_make (name
);
2319 S_SET_EXTERNAL (symbolP
);
2322 c
= *input_line_pointer
;
2325 input_line_pointer
++;
2327 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
2335 demand_empty_rest_of_line ();
2338 mri_comment_end (stop
, stopc
);
2341 /* Handle the MRI IRP and IRPC pseudo-ops. */
2352 as_where (&file
, &line
);
2354 eol
= find_end_of_line (input_line_pointer
, 0);
2355 sb_build (&s
, eol
- input_line_pointer
);
2356 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2357 input_line_pointer
= eol
;
2361 err
= expand_irp (irpc
, 0, &s
, &out
, get_non_macro_line_sb
);
2363 as_bad_where (file
, line
, "%s", err
);
2367 input_scrub_include_sb (&out
, input_line_pointer
, 1);
2369 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2372 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2373 the section to only be linked once. However, this is not supported
2374 by most object file formats. This takes an optional argument,
2375 which is what to do about duplicates. */
2378 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
2380 enum linkonce_type type
;
2384 type
= LINKONCE_DISCARD
;
2386 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
2391 c
= get_symbol_name (& s
);
2392 if (strcasecmp (s
, "discard") == 0)
2393 type
= LINKONCE_DISCARD
;
2394 else if (strcasecmp (s
, "one_only") == 0)
2395 type
= LINKONCE_ONE_ONLY
;
2396 else if (strcasecmp (s
, "same_size") == 0)
2397 type
= LINKONCE_SAME_SIZE
;
2398 else if (strcasecmp (s
, "same_contents") == 0)
2399 type
= LINKONCE_SAME_CONTENTS
;
2401 as_warn (_("unrecognized .linkonce type `%s'"), s
);
2403 (void) restore_line_pointer (c
);
2406 #ifdef obj_handle_link_once
2407 obj_handle_link_once (type
);
2408 #else /* ! defined (obj_handle_link_once) */
2412 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
2413 as_warn (_(".linkonce is not supported for this object file format"));
2415 flags
= bfd_get_section_flags (stdoutput
, now_seg
);
2416 flags
|= SEC_LINK_ONCE
;
2421 case LINKONCE_DISCARD
:
2422 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
2424 case LINKONCE_ONE_ONLY
:
2425 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
2427 case LINKONCE_SAME_SIZE
:
2428 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
2430 case LINKONCE_SAME_CONTENTS
:
2431 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
2434 if (!bfd_set_section_flags (stdoutput
, now_seg
, flags
))
2435 as_bad (_("bfd_set_section_flags: %s"),
2436 bfd_errmsg (bfd_get_error ()));
2438 #endif /* ! defined (obj_handle_link_once) */
2440 demand_empty_rest_of_line ();
2444 bss_alloc (symbolS
*symbolP
, addressT size
, unsigned int align
)
2447 segT current_seg
= now_seg
;
2448 subsegT current_subseg
= now_subseg
;
2449 segT bss_seg
= bss_section
;
2451 #if defined (TC_MIPS) || defined (TC_ALPHA)
2452 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
2453 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
2455 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2456 if (size
<= bfd_get_gp_size (stdoutput
))
2458 bss_seg
= subseg_new (".sbss", 1);
2459 seg_info (bss_seg
)->bss
= 1;
2460 if (!bfd_set_section_flags (stdoutput
, bss_seg
, SEC_ALLOC
))
2461 as_warn (_("error setting flags for \".sbss\": %s"),
2462 bfd_errmsg (bfd_get_error ()));
2466 subseg_set (bss_seg
, 1);
2468 if (align
> OCTETS_PER_BYTE_POWER
)
2470 record_alignment (bss_seg
, align
);
2471 frag_align (align
, 0, 0);
2474 /* Detach from old frag. */
2475 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2476 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2478 symbol_set_frag (symbolP
, frag_now
);
2479 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
, NULL
);
2483 S_SET_SIZE (symbolP
, size
);
2485 S_SET_SEGMENT (symbolP
, bss_seg
);
2488 /* The symbol may already have been created with a preceding
2489 ".globl" directive -- be careful not to step on storage class
2490 in that case. Otherwise, set it to static. */
2491 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2492 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2493 #endif /* OBJ_COFF */
2495 subseg_set (current_seg
, current_subseg
);
2499 parse_align (int align_bytes
)
2505 if (*input_line_pointer
!= ',')
2508 as_bad (_("expected alignment after size"));
2509 ignore_rest_of_line ();
2513 input_line_pointer
++;
2516 align
= get_absolute_expr (&exp
);
2517 if (exp
.X_op
== O_absent
)
2520 if (!exp
.X_unsigned
)
2522 as_warn (_("alignment negative; 0 assumed"));
2526 if (align_bytes
&& align
!= 0)
2528 /* convert to a power of 2 alignment */
2529 unsigned int alignp2
= 0;
2530 while ((align
& 1) == 0)
2531 align
>>= 1, ++alignp2
;
2534 as_bad (_("alignment not a power of 2"));
2535 ignore_rest_of_line ();
2543 /* Called from s_comm_internal after symbol name and size have been
2544 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2545 1 if this was a ".bss" directive which has a 3rd argument
2546 (alignment as a power of 2), or 2 if this was a ".bss" directive
2547 with alignment in bytes. */
2550 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2556 align
= parse_align (needs_align
- 1);
2557 if (align
== (addressT
) -1)
2561 /* Assume some objects may require alignment on some systems. */
2562 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2564 bss_alloc (symbolP
, size
, align
);
2569 s_lcomm (int needs_align
)
2571 s_comm_internal (needs_align
, s_lcomm_internal
);
2575 s_lcomm_bytes (int needs_align
)
2577 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2581 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2587 /* We permit ANY defined expression: BSD4.2 demands constants. */
2588 if ((name
= read_symbol_name ()) == NULL
)
2591 if (*input_line_pointer
!= ',')
2593 as_bad (_("expected comma after \"%s\""), name
);
2597 input_line_pointer
++;
2598 expression_and_evaluate (&exp
);
2600 if (exp
.X_op
!= O_constant
2601 && exp
.X_op
!= O_register
)
2603 as_bad (_("bad expression"));
2607 symbolP
= symbol_find_or_make (name
);
2609 if (S_GET_SEGMENT (symbolP
) == undefined_section
)
2611 /* The name might be an undefined .global symbol; be sure to
2612 keep the "external" bit. */
2613 S_SET_SEGMENT (symbolP
,
2614 (exp
.X_op
== O_constant
2617 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2621 as_bad (_("symbol `%s' is already defined"), name
);
2624 demand_empty_rest_of_line ();
2629 ignore_rest_of_line ();
2634 /* Read a line into an sb. Returns the character that ended the line
2635 or zero if there are no more lines. */
2638 get_line_sb (sb
*line
, int in_macro
)
2642 if (input_line_pointer
[-1] == '\n')
2643 bump_line_counters ();
2645 if (input_line_pointer
>= buffer_limit
)
2647 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2648 if (buffer_limit
== 0)
2652 eol
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 0, in_macro
);
2653 sb_add_buffer (line
, input_line_pointer
, eol
- input_line_pointer
);
2654 input_line_pointer
= eol
;
2656 /* Don't skip multiple end-of-line characters, because that breaks support
2657 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2658 characters but isn't. Instead just skip one end of line character and
2659 return the character skipped so that the caller can re-insert it if
2661 return *input_line_pointer
++;
2665 get_non_macro_line_sb (sb
*line
)
2667 return get_line_sb (line
, 0);
2671 get_macro_line_sb (sb
*line
)
2673 return get_line_sb (line
, 1);
2676 /* Define a macro. This is an interface to macro.c. */
2679 s_macro (int ignore ATTRIBUTE_UNUSED
)
2687 as_where (&file
, &line
);
2689 eol
= find_end_of_line (input_line_pointer
, 0);
2690 sb_build (&s
, eol
- input_line_pointer
);
2691 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2692 input_line_pointer
= eol
;
2694 if (line_label
!= NULL
)
2699 name
= S_GET_NAME (line_label
);
2700 len
= strlen (name
);
2701 sb_build (&label
, len
);
2702 sb_add_buffer (&label
, name
, len
);
2703 err
= define_macro (0, &s
, &label
, get_macro_line_sb
, file
, line
, &name
);
2707 err
= define_macro (0, &s
, NULL
, get_macro_line_sb
, file
, line
, &name
);
2709 as_bad_where (file
, line
, err
, name
);
2712 if (line_label
!= NULL
)
2714 S_SET_SEGMENT (line_label
, absolute_section
);
2715 S_SET_VALUE (line_label
, 0);
2716 symbol_set_frag (line_label
, &zero_address_frag
);
2719 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2720 && hash_find (po_hash
, name
) != NULL
)
2723 && hash_find (po_hash
, name
+ 1) != NULL
))
2724 as_warn_where (file
,
2726 _("attempt to redefine pseudo-op `%s' ignored"),
2733 /* Handle the .mexit pseudo-op, which immediately exits a macro
2737 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2741 cond_exit_macro (macro_nest
);
2742 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2745 as_warn (_("ignoring macro exit outside a macro definition."));
2748 /* Switch in and out of MRI mode. */
2751 s_mri (int ignore ATTRIBUTE_UNUSED
)
2754 #ifdef MRI_MODE_CHANGE
2758 on
= get_absolute_expression ();
2759 #ifdef MRI_MODE_CHANGE
2760 old_flag
= flag_mri
;
2779 /* Operator precedence changes in m68k MRI mode, so we need to
2780 update the operator rankings. */
2781 expr_set_precedence ();
2783 #ifdef MRI_MODE_CHANGE
2785 MRI_MODE_CHANGE (on
);
2788 demand_empty_rest_of_line ();
2791 /* Handle changing the location counter. */
2794 do_org (segT segment
, expressionS
*exp
, int fill
)
2796 if (segment
!= now_seg
2797 && segment
!= absolute_section
2798 && segment
!= expr_section
)
2799 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2801 if (now_seg
== absolute_section
)
2804 as_warn (_("ignoring fill value in absolute section"));
2805 if (exp
->X_op
!= O_constant
)
2807 as_bad (_("only constant offsets supported in absolute section"));
2808 exp
->X_add_number
= 0;
2810 abs_section_offset
= exp
->X_add_number
;
2815 symbolS
*sym
= exp
->X_add_symbol
;
2816 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2818 if (fill
&& in_bss ())
2819 as_warn (_("ignoring fill value in section `%s'"),
2820 segment_name (now_seg
));
2822 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2824 /* Handle complex expressions. */
2825 sym
= make_expr_symbol (exp
);
2829 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2835 s_org (int ignore ATTRIBUTE_UNUSED
)
2841 #ifdef md_flush_pending_output
2842 md_flush_pending_output ();
2845 /* The m68k MRI assembler has a different meaning for .org. It
2846 means to create an absolute section at a given address. We can't
2847 support that--use a linker script instead. */
2850 as_bad (_("MRI style ORG pseudo-op not supported"));
2851 ignore_rest_of_line ();
2855 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2856 thing as a sub-segment-relative origin. Any absolute origin is
2857 given a warning, then assumed to be segment-relative. Any
2858 segmented origin expression ("foo+42") had better be in the right
2859 segment or the .org is ignored.
2861 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2862 we never know sub-segment sizes when we are reading code. BSD
2863 will crash trying to emit negative numbers of filler bytes in
2864 certain .orgs. We don't crash, but see as-write for that code.
2866 Don't make frag if need_pass_2==1. */
2867 segment
= get_known_segmented_expression (&exp
);
2868 if (*input_line_pointer
== ',')
2870 input_line_pointer
++;
2871 temp_fill
= get_absolute_expression ();
2877 do_org (segment
, &exp
, temp_fill
);
2879 demand_empty_rest_of_line ();
2882 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2883 called by the obj-format routine which handles section changing
2884 when in MRI mode. It will create a new section, and return it. It
2885 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2886 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2889 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2899 name
= input_line_pointer
;
2900 if (!ISDIGIT (*name
))
2901 c
= get_symbol_name (& name
);
2906 ++input_line_pointer
;
2908 while (ISDIGIT (*input_line_pointer
));
2910 c
= *input_line_pointer
;
2911 *input_line_pointer
= '\0';
2914 name
= xstrdup (name
);
2916 c
= restore_line_pointer (c
);
2918 seg
= subseg_new (name
, 0);
2924 ++input_line_pointer
;
2925 align
= get_absolute_expression ();
2926 record_alignment (seg
, align
);
2930 if (*input_line_pointer
== ',')
2932 c
= *++input_line_pointer
;
2934 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
2937 as_bad (_("unrecognized section type"));
2938 ++input_line_pointer
;
2943 flags
= SEC_NO_FLAGS
;
2945 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
2946 else if (*type
== 'D' || *type
== 'M')
2947 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
2948 else if (*type
== 'R')
2949 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
2950 if (flags
!= SEC_NO_FLAGS
)
2952 if (!bfd_set_section_flags (stdoutput
, seg
, flags
))
2953 as_warn (_("error setting flags for \"%s\": %s"),
2954 bfd_section_name (stdoutput
, seg
),
2955 bfd_errmsg (bfd_get_error ()));
2960 /* Ignore the HP type. */
2961 if (*input_line_pointer
== ',')
2962 input_line_pointer
+= 2;
2964 demand_empty_rest_of_line ();
2966 #else /* ! TC_M68K */
2975 c
= get_symbol_name (& name
);
2977 name
= xstrdup (name
);
2979 c
= restore_line_pointer (c
);
2981 seg
= subseg_new (name
, 0);
2989 ++input_line_pointer
;
2991 c
= get_symbol_name (& sectype
);
2992 if (*sectype
== '\0')
2994 else if (strcasecmp (sectype
, "text") == 0)
2996 else if (strcasecmp (sectype
, "data") == 0)
2998 else if (strcasecmp (sectype
, "romdata") == 0)
3001 as_warn (_("unrecognized section type `%s'"), sectype
);
3002 (void) restore_line_pointer (c
);
3005 if (*input_line_pointer
== ',')
3009 ++input_line_pointer
;
3011 c
= get_symbol_name (& seccmd
);
3012 if (strcasecmp (seccmd
, "absolute") == 0)
3014 as_bad (_("absolute sections are not supported"));
3015 *input_line_pointer
= c
;
3016 ignore_rest_of_line ();
3019 else if (strcasecmp (seccmd
, "align") == 0)
3023 (void) restore_line_pointer (c
);
3024 align
= get_absolute_expression ();
3025 record_alignment (seg
, align
);
3029 as_warn (_("unrecognized section command `%s'"), seccmd
);
3030 (void) restore_line_pointer (c
);
3034 demand_empty_rest_of_line ();
3036 #else /* ! TC_I960 */
3037 /* The MRI assembler seems to use different forms of .sect for
3038 different targets. */
3039 as_bad ("MRI mode not supported for this target");
3040 ignore_rest_of_line ();
3041 #endif /* ! TC_I960 */
3042 #endif /* ! TC_M68K */
3045 /* Handle the .print pseudo-op. */
3048 s_print (int ignore ATTRIBUTE_UNUSED
)
3053 s
= demand_copy_C_string (&len
);
3056 demand_empty_rest_of_line ();
3059 /* Handle the .purgem pseudo-op. */
3062 s_purgem (int ignore ATTRIBUTE_UNUSED
)
3064 if (is_it_end_of_statement ())
3066 demand_empty_rest_of_line ();
3076 c
= get_symbol_name (& name
);
3077 delete_macro (name
);
3078 *input_line_pointer
= c
;
3079 SKIP_WHITESPACE_AFTER_NAME ();
3081 while (*input_line_pointer
++ == ',');
3083 --input_line_pointer
;
3084 demand_empty_rest_of_line ();
3087 /* Handle the .endm/.endr pseudo-ops. */
3090 s_bad_end (int endr
)
3092 as_warn (_(".end%c encountered without preceding %s"),
3094 endr
? ".rept, .irp, or .irpc" : ".macro");
3095 demand_empty_rest_of_line ();
3098 /* Handle the .rept pseudo-op. */
3101 s_rept (int ignore ATTRIBUTE_UNUSED
)
3105 count
= get_absolute_expression ();
3107 do_repeat (count
, "REPT", "ENDR");
3110 /* This function provides a generic repeat block implementation. It allows
3111 different directives to be used as the start/end keys. */
3114 do_repeat (int count
, const char *start
, const char *end
)
3120 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
3122 as_bad (_("%s without %s"), start
, end
);
3126 sb_build (&many
, count
* one
.len
);
3128 sb_add_sb (&many
, &one
);
3132 input_scrub_include_sb (&many
, input_line_pointer
, 1);
3134 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3137 /* Like do_repeat except that any text matching EXPANDER in the
3138 block is replaced by the itteration count. */
3141 do_repeat_with_expander (int count
,
3144 const char * expander
)
3150 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
3152 as_bad (_("%s without %s"), start
, end
);
3158 if (expander
!= NULL
&& strstr (one
.ptr
, expander
) != NULL
)
3160 while (count
-- > 0)
3166 sb_build (& processed
, one
.len
);
3167 sb_add_sb (& processed
, & one
);
3168 sub
= strstr (processed
.ptr
, expander
);
3169 len
= sprintf (sub
, "%d", count
);
3170 gas_assert (len
< 8);
3171 strcpy (sub
+ len
, sub
+ 8);
3172 processed
.len
-= (8 - len
);
3173 sb_add_sb (& many
, & processed
);
3174 sb_kill (& processed
);
3179 sb_add_sb (&many
, &one
);
3183 input_scrub_include_sb (&many
, input_line_pointer
, 1);
3185 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3188 /* Skip to end of current repeat loop; EXTRA indicates how many additional
3189 input buffers to skip. Assumes that conditionals preceding the loop end
3190 are properly nested.
3192 This function makes it easier to implement a premature "break" out of the
3193 loop. The EXTRA arg accounts for other buffers we might have inserted,
3194 such as line substitutions. */
3197 end_repeat (int extra
)
3199 cond_exit_macro (macro_nest
);
3200 while (extra
-- >= 0)
3201 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3205 assign_symbol (char *name
, int mode
)
3209 if (name
[0] == '.' && name
[1] == '\0')
3211 /* Turn '. = mumble' into a .org mumble. */
3215 segment
= get_known_segmented_expression (&exp
);
3218 do_org (segment
, &exp
, 0);
3223 if ((symbolP
= symbol_find (name
)) == NULL
3224 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
3226 symbolP
= symbol_find_or_make (name
);
3228 /* When doing symbol listings, play games with dummy fragments living
3229 outside the normal fragment chain to record the file and line info
3231 if (listing
& LISTING_SYMBOLS
)
3233 extern struct list_info_struct
*listing_tail
;
3234 fragS
*dummy_frag
= (fragS
*) xcalloc (1, sizeof (fragS
));
3235 dummy_frag
->line
= listing_tail
;
3236 dummy_frag
->fr_symbol
= symbolP
;
3237 symbol_set_frag (symbolP
, dummy_frag
);
3240 #if defined (OBJ_COFF) && !defined (TE_PE)
3241 /* "set" symbols are local unless otherwise specified. */
3242 SF_SET_LOCAL (symbolP
);
3246 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3248 if ((mode
!= 0 || !S_IS_VOLATILE (symbolP
))
3249 && !S_CAN_BE_REDEFINED (symbolP
))
3251 as_bad (_("symbol `%s' is already defined"), name
);
3252 symbolP
= symbol_clone (symbolP
, 0);
3254 /* If the symbol is volatile, copy the symbol and replace the
3255 original with the copy, so that previous uses of the symbol will
3256 retain the value of the symbol at the point of use. */
3257 else if (S_IS_VOLATILE (symbolP
))
3258 symbolP
= symbol_clone (symbolP
, 1);
3262 S_SET_VOLATILE (symbolP
);
3264 S_SET_FORWARD_REF (symbolP
);
3266 pseudo_set (symbolP
);
3269 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3270 then this is .equiv, and it is an error if the symbol is already
3271 defined. If EQUIV is -1, the symbol additionally is a forward
3279 /* Especial apologies for the random logic:
3280 this just grew, and could be parsed much more simply!
3282 if ((name
= read_symbol_name ()) == NULL
)
3285 if (*input_line_pointer
!= ',')
3287 as_bad (_("expected comma after \"%s\""), name
);
3288 ignore_rest_of_line ();
3293 input_line_pointer
++;
3294 assign_symbol (name
, equiv
);
3295 demand_empty_rest_of_line ();
3309 #ifdef md_flush_pending_output
3310 md_flush_pending_output ();
3313 #ifdef md_cons_align
3318 stop
= mri_comment_field (&stopc
);
3320 /* In m68k MRI mode, we need to align to a word boundary, unless
3322 if (flag_m68k_mri
&& mult
> 1)
3324 if (now_seg
== absolute_section
)
3326 abs_section_offset
+= abs_section_offset
& 1;
3327 if (line_label
!= NULL
)
3328 S_SET_VALUE (line_label
, abs_section_offset
);
3330 else if (mri_common_symbol
!= NULL
)
3334 mri_val
= S_GET_VALUE (mri_common_symbol
);
3335 if ((mri_val
& 1) != 0)
3337 S_SET_VALUE (mri_common_symbol
, mri_val
+ 1);
3338 if (line_label
!= NULL
)
3340 expressionS
*symexp
;
3342 symexp
= symbol_get_value_expression (line_label
);
3343 know (symexp
->X_op
== O_symbol
);
3344 know (symexp
->X_add_symbol
== mri_common_symbol
);
3345 symexp
->X_add_number
+= 1;
3351 do_align (1, (char *) NULL
, 0, 0);
3352 if (line_label
!= NULL
)
3354 symbol_set_frag (line_label
, frag_now
);
3355 S_SET_VALUE (line_label
, frag_now_fix ());
3365 if (*input_line_pointer
== ',')
3367 ++input_line_pointer
;
3372 val
.X_op
= O_constant
;
3373 val
.X_add_number
= 0;
3376 if ((val
.X_op
!= O_constant
3377 || val
.X_add_number
< - 0x80
3378 || val
.X_add_number
> 0xff
3379 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
3380 && (now_seg
!= absolute_section
&& !in_bss ()))
3382 resolve_expression (&exp
);
3383 if (exp
.X_op
!= O_constant
)
3384 as_bad (_("unsupported variable size or fill value"));
3391 bytes
= mult
* exp
.X_add_number
;
3392 for (i
= 0; i
< exp
.X_add_number
; i
++)
3393 emit_expr (&val
, mult
);
3398 if (now_seg
== absolute_section
|| mri_common_symbol
!= NULL
)
3399 resolve_expression (&exp
);
3401 if (exp
.X_op
== O_constant
)
3405 repeat
= exp
.X_add_number
;
3412 as_warn (_(".space repeat count is zero, ignored"));
3413 else if (repeat
< 0)
3414 as_warn (_(".space repeat count is negative, ignored"));
3418 /* If we are in the absolute section, just bump the offset. */
3419 if (now_seg
== absolute_section
)
3421 if (val
.X_op
!= O_constant
|| val
.X_add_number
!= 0)
3422 as_warn (_("ignoring fill value in absolute section"));
3423 abs_section_offset
+= repeat
;
3427 /* If we are secretly in an MRI common section, then
3428 creating space just increases the size of the common
3430 if (mri_common_symbol
!= NULL
)
3432 S_SET_VALUE (mri_common_symbol
,
3433 S_GET_VALUE (mri_common_symbol
) + repeat
);
3438 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
3439 (offsetT
) repeat
, (char *) 0);
3443 if (now_seg
== absolute_section
)
3445 as_bad (_("space allocation too complex in absolute section"));
3446 subseg_set (text_section
, 0);
3449 if (mri_common_symbol
!= NULL
)
3451 as_bad (_("space allocation too complex in common section"));
3452 mri_common_symbol
= NULL
;
3456 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
3457 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
3460 if ((val
.X_op
!= O_constant
|| val
.X_add_number
!= 0) && in_bss ())
3461 as_warn (_("ignoring fill value in section `%s'"),
3462 segment_name (now_seg
));
3464 *p
= val
.X_add_number
;
3469 /* In MRI mode, after an odd number of bytes, we must align to an
3470 even word boundary, unless the next instruction is a dc.b, ds.b
3472 if (flag_mri
&& (bytes
& 1) != 0)
3473 mri_pending_align
= 1;
3475 demand_empty_rest_of_line ();
3478 mri_comment_end (stop
, stopc
);
3481 /* This is like s_space, but the value is a floating point number with
3482 the given precision. This is for the MRI dcb.s pseudo-op and
3486 s_float_space (int float_type
)
3490 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
3494 #ifdef md_cons_align
3499 stop
= mri_comment_field (&stopc
);
3501 count
= get_absolute_expression ();
3504 if (*input_line_pointer
!= ',')
3506 as_bad (_("missing value"));
3507 ignore_rest_of_line ();
3509 mri_comment_end (stop
, stopc
);
3513 ++input_line_pointer
;
3517 /* Skip any 0{letter} that may be present. Don't even check if the
3518 * letter is legal. */
3519 if (input_line_pointer
[0] == '0'
3520 && ISALPHA (input_line_pointer
[1]))
3521 input_line_pointer
+= 2;
3523 /* Accept :xxxx, where the x's are hex digits, for a floating point
3524 with the exact digits specified. */
3525 if (input_line_pointer
[0] == ':')
3527 flen
= hex_float (float_type
, temp
);
3530 ignore_rest_of_line ();
3532 mri_comment_end (stop
, stopc
);
3540 err
= md_atof (float_type
, temp
, &flen
);
3541 know (flen
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3542 know (err
!= NULL
|| flen
> 0);
3545 as_bad (_("bad floating literal: %s"), err
);
3546 ignore_rest_of_line ();
3548 mri_comment_end (stop
, stopc
);
3553 while (--count
>= 0)
3557 p
= frag_more (flen
);
3558 memcpy (p
, temp
, (unsigned int) flen
);
3561 demand_empty_rest_of_line ();
3564 mri_comment_end (stop
, stopc
);
3567 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3570 s_struct (int ignore ATTRIBUTE_UNUSED
)
3576 stop
= mri_comment_field (&stopc
);
3577 abs_section_offset
= get_absolute_expression ();
3578 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3579 /* The ELF backend needs to know that we are changing sections, so
3580 that .previous works correctly. */
3582 obj_elf_section_change_hook ();
3584 subseg_set (absolute_section
, 0);
3585 demand_empty_rest_of_line ();
3587 mri_comment_end (stop
, stopc
);
3591 s_text (int ignore ATTRIBUTE_UNUSED
)
3595 temp
= get_absolute_expression ();
3596 subseg_set (text_section
, (subsegT
) temp
);
3597 demand_empty_rest_of_line ();
3600 /* .weakref x, y sets x as an alias to y that, as long as y is not
3601 referenced directly, will cause y to become a weak symbol. */
3603 s_weakref (int ignore ATTRIBUTE_UNUSED
)
3610 if ((name
= read_symbol_name ()) == NULL
)
3613 symbolP
= symbol_find_or_make (name
);
3615 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3617 if (!S_IS_VOLATILE (symbolP
))
3619 as_bad (_("symbol `%s' is already defined"), name
);
3622 symbolP
= symbol_clone (symbolP
, 1);
3623 S_CLEAR_VOLATILE (symbolP
);
3628 if (*input_line_pointer
!= ',')
3630 as_bad (_("expected comma after \"%s\""), name
);
3634 input_line_pointer
++;
3639 if ((name
= read_symbol_name ()) == NULL
)
3642 if ((symbolP2
= symbol_find_noref (name
, 1)) == NULL
3643 && (symbolP2
= md_undefined_symbol (name
)) == NULL
)
3645 symbolP2
= symbol_find_or_make (name
);
3646 S_SET_WEAKREFD (symbolP2
);
3650 symbolS
*symp
= symbolP2
;
3652 while (S_IS_WEAKREFR (symp
) && symp
!= symbolP
)
3654 expressionS
*expP
= symbol_get_value_expression (symp
);
3656 gas_assert (expP
->X_op
== O_symbol
3657 && expP
->X_add_number
== 0);
3658 symp
= expP
->X_add_symbol
;
3660 if (symp
== symbolP
)
3664 loop
= concat (S_GET_NAME (symbolP
),
3665 " => ", S_GET_NAME (symbolP2
), (const char *) NULL
);
3668 while (symp
!= symbolP
)
3670 char *old_loop
= loop
;
3672 symp
= symbol_get_value_expression (symp
)->X_add_symbol
;
3673 loop
= concat (loop
, " => ", S_GET_NAME (symp
),
3674 (const char *) NULL
);
3678 as_bad (_("%s: would close weakref loop: %s"),
3679 S_GET_NAME (symbolP
), loop
);
3683 ignore_rest_of_line ();
3687 /* Short-circuiting instead of just checking here might speed
3688 things up a tiny little bit, but loop error messages would
3689 miss intermediate links. */
3690 /* symbolP2 = symp; */
3693 memset (&exp
, 0, sizeof (exp
));
3694 exp
.X_op
= O_symbol
;
3695 exp
.X_add_symbol
= symbolP2
;
3697 S_SET_SEGMENT (symbolP
, undefined_section
);
3698 symbol_set_value_expression (symbolP
, &exp
);
3699 symbol_set_frag (symbolP
, &zero_address_frag
);
3700 S_SET_WEAKREFR (symbolP
);
3702 demand_empty_rest_of_line ();
3707 ignore_rest_of_line ();
3713 /* Verify that we are at the end of a line. If not, issue an error and
3717 demand_empty_rest_of_line (void)
3720 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3721 input_line_pointer
++;
3724 if (ISPRINT (*input_line_pointer
))
3725 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3726 *input_line_pointer
);
3728 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3729 *input_line_pointer
);
3730 ignore_rest_of_line ();
3733 /* Return pointing just after end-of-line. */
3734 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3737 /* Silently advance to the end of line. Use this after already having
3738 issued an error about something bad. */
3741 ignore_rest_of_line (void)
3743 while (input_line_pointer
< buffer_limit
3744 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3745 input_line_pointer
++;
3747 input_line_pointer
++;
3749 /* Return pointing just after end-of-line. */
3750 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3753 /* Sets frag for given symbol to zero_address_frag, except when the
3754 symbol frag is already set to a dummy listing frag. */
3757 set_zero_frag (symbolS
*symbolP
)
3759 if (symbol_get_frag (symbolP
)->fr_type
!= rs_dummy
)
3760 symbol_set_frag (symbolP
, &zero_address_frag
);
3763 /* In: Pointer to a symbol.
3764 Input_line_pointer->expression.
3766 Out: Input_line_pointer->just after any whitespace after expression.
3767 Tried to set symbol to value of expression.
3768 Will change symbols type, value, and frag; */
3771 pseudo_set (symbolS
*symbolP
)
3776 know (symbolP
); /* NULL pointer is logic error. */
3778 if (!S_IS_FORWARD_REF (symbolP
))
3779 (void) expression (&exp
);
3781 (void) deferred_expression (&exp
);
3783 if (exp
.X_op
== O_illegal
)
3784 as_bad (_("illegal expression"));
3785 else if (exp
.X_op
== O_absent
)
3786 as_bad (_("missing expression"));
3787 else if (exp
.X_op
== O_big
)
3789 if (exp
.X_add_number
> 0)
3790 as_bad (_("bignum invalid"));
3792 as_bad (_("floating point number invalid"));
3794 else if (exp
.X_op
== O_subtract
3795 && !S_IS_FORWARD_REF (symbolP
)
3796 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
3797 && (symbol_get_frag (exp
.X_add_symbol
)
3798 == symbol_get_frag (exp
.X_op_symbol
)))
3800 exp
.X_op
= O_constant
;
3801 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
3802 - S_GET_VALUE (exp
.X_op_symbol
));
3805 if (symbol_section_p (symbolP
))
3807 as_bad ("attempt to set value of section symbol");
3816 exp
.X_add_number
= 0;
3819 S_SET_SEGMENT (symbolP
, absolute_section
);
3820 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3821 set_zero_frag (symbolP
);
3825 #ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
3826 if (S_IS_EXTERNAL (symbolP
))
3828 as_bad ("can't equate global symbol `%s' with register name",
3829 S_GET_NAME (symbolP
));
3833 S_SET_SEGMENT (symbolP
, reg_section
);
3834 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3835 set_zero_frag (symbolP
);
3836 symbol_get_value_expression (symbolP
)->X_op
= O_register
;
3840 seg
= S_GET_SEGMENT (exp
.X_add_symbol
);
3841 /* For x=undef+const, create an expression symbol.
3842 For x=x+const, just update x except when x is an undefined symbol
3843 For x=defined+const, evaluate x. */
3844 if (symbolP
== exp
.X_add_symbol
3845 && (seg
!= undefined_section
3846 || !symbol_constant_p (symbolP
)))
3848 *symbol_X_add_number (symbolP
) += exp
.X_add_number
;
3851 else if (!S_IS_FORWARD_REF (symbolP
) && seg
!= undefined_section
)
3853 symbolS
*s
= exp
.X_add_symbol
;
3855 if (S_IS_COMMON (s
))
3856 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3857 S_GET_NAME (symbolP
), S_GET_NAME (s
));
3859 S_SET_SEGMENT (symbolP
, seg
);
3860 S_SET_VALUE (symbolP
, exp
.X_add_number
+ S_GET_VALUE (s
));
3861 symbol_set_frag (symbolP
, symbol_get_frag (s
));
3862 copy_symbol_attributes (symbolP
, s
);
3865 S_SET_SEGMENT (symbolP
, undefined_section
);
3866 symbol_set_value_expression (symbolP
, &exp
);
3867 copy_symbol_attributes (symbolP
, exp
.X_add_symbol
);
3868 set_zero_frag (symbolP
);
3872 /* The value is some complex expression. */
3873 S_SET_SEGMENT (symbolP
, expr_section
);
3874 symbol_set_value_expression (symbolP
, &exp
);
3875 set_zero_frag (symbolP
);
3882 CONStruct more frag of .bytes, or .words etc.
3883 Should need_pass_2 be 1 then emit no frag(s).
3884 This understands EXPRESSIONS.
3888 This has a split personality. We use expression() to read the
3889 value. We can detect if the value won't fit in a byte or word.
3890 But we can't detect if expression() discarded significant digits
3891 in the case of a long. Not worth the crocks required to fix it. */
3893 /* Select a parser for cons expressions. */
3895 /* Some targets need to parse the expression in various fancy ways.
3896 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3897 (for example, the HPPA does this). Otherwise, you can define
3898 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3899 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3900 are defined, which is the normal case, then only simple expressions
3905 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
3908 #ifndef TC_PARSE_CONS_EXPRESSION
3909 #ifdef BITFIELD_CONS_EXPRESSIONS
3910 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3911 (parse_bitfield_cons (EXP, NBYTES), TC_PARSE_CONS_RETURN_NONE)
3913 parse_bitfield_cons (expressionS
*exp
, unsigned int nbytes
);
3915 #ifdef REPEAT_CONS_EXPRESSIONS
3916 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3917 (parse_repeat_cons (EXP, NBYTES), TC_PARSE_CONS_RETURN_NONE)
3919 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
3922 /* If we haven't gotten one yet, just call expression. */
3923 #ifndef TC_PARSE_CONS_EXPRESSION
3924 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3925 (expression (EXP), TC_PARSE_CONS_RETURN_NONE)
3930 do_parse_cons_expression (expressionS
*exp
,
3931 int nbytes ATTRIBUTE_UNUSED
)
3933 (void) TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3937 /* Worker to do .byte etc statements.
3938 Clobbers input_line_pointer and checks end-of-line. */
3941 cons_worker (int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
3949 #ifdef md_flush_pending_output
3950 md_flush_pending_output ();
3954 stop
= mri_comment_field (&stopc
);
3956 if (is_it_end_of_statement ())
3958 demand_empty_rest_of_line ();
3960 mri_comment_end (stop
, stopc
);
3964 #ifdef TC_ADDRESS_BYTES
3966 nbytes
= TC_ADDRESS_BYTES ();
3969 #ifdef md_cons_align
3970 md_cons_align (nbytes
);
3976 TC_PARSE_CONS_RETURN_TYPE ret
= TC_PARSE_CONS_RETURN_NONE
;
3977 #ifdef TC_CONS_FIX_CHECK
3978 fixS
**cur_fix
= &frchain_now
->fix_tail
;
3980 if (*cur_fix
!= NULL
)
3981 cur_fix
= &(*cur_fix
)->fx_next
;
3986 parse_mri_cons (&exp
, (unsigned int) nbytes
);
3991 if (*input_line_pointer
== '"')
3993 as_bad (_("unexpected `\"' in expression"));
3994 ignore_rest_of_line ();
3998 ret
= TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
4003 if (exp
.X_op
== O_symbol
)
4004 exp
.X_op
= O_symbol_rva
;
4006 as_fatal (_("rva without symbol"));
4008 emit_expr_with_reloc (&exp
, (unsigned int) nbytes
, ret
);
4009 #ifdef TC_CONS_FIX_CHECK
4010 TC_CONS_FIX_CHECK (&exp
, nbytes
, *cur_fix
);
4014 while (*input_line_pointer
++ == ',');
4016 /* In MRI mode, after an odd number of bytes, we must align to an
4017 even word boundary, unless the next instruction is a dc.b, ds.b
4019 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
4020 mri_pending_align
= 1;
4022 input_line_pointer
--; /* Put terminator back into stream. */
4024 demand_empty_rest_of_line ();
4027 mri_comment_end (stop
, stopc
);
4033 cons_worker (size
, 0);
4039 cons_worker (size
, 1);
4042 /* .reloc offset, reloc_name, symbol+addend. */
4045 s_reloc (int ignore ATTRIBUTE_UNUSED
)
4052 struct reloc_list
*reloc
;
4053 struct _bfd_rel
{ const char * name
; bfd_reloc_code_real_type code
; };
4054 static struct _bfd_rel bfd_relocs
[] =
4056 { "NONE", BFD_RELOC_NONE
},
4057 { "8", BFD_RELOC_8
},
4058 { "16", BFD_RELOC_16
},
4059 { "32", BFD_RELOC_32
},
4060 { "64", BFD_RELOC_64
}
4063 reloc
= (struct reloc_list
*) xmalloc (sizeof (*reloc
));
4066 stop
= mri_comment_field (&stopc
);
4075 as_bad (_("missing or bad offset expression"));
4078 exp
.X_add_symbol
= section_symbol (now_seg
);
4079 exp
.X_op
= O_symbol
;
4082 if (exp
.X_add_number
== 0)
4084 reloc
->u
.a
.offset_sym
= exp
.X_add_symbol
;
4089 reloc
->u
.a
.offset_sym
= make_expr_symbol (&exp
);
4094 if (*input_line_pointer
!= ',')
4096 as_bad (_("missing reloc type"));
4100 ++input_line_pointer
;
4102 c
= get_symbol_name (& r_name
);
4103 if (strncasecmp (r_name
, "BFD_RELOC_", 10) == 0)
4107 for (reloc
->u
.a
.howto
= NULL
, i
= 0; i
< ARRAY_SIZE (bfd_relocs
); i
++)
4108 if (strcasecmp (r_name
+ 10, bfd_relocs
[i
].name
) == 0)
4110 reloc
->u
.a
.howto
= bfd_reloc_type_lookup (stdoutput
,
4111 bfd_relocs
[i
].code
);
4116 reloc
->u
.a
.howto
= bfd_reloc_name_lookup (stdoutput
, r_name
);
4117 *input_line_pointer
= c
;
4118 if (reloc
->u
.a
.howto
== NULL
)
4120 as_bad (_("unrecognized reloc type"));
4124 exp
.X_op
= O_absent
;
4125 SKIP_WHITESPACE_AFTER_NAME ();
4126 if (*input_line_pointer
== ',')
4128 ++input_line_pointer
;
4136 as_bad (_("bad reloc expression"));
4138 ignore_rest_of_line ();
4141 mri_comment_end (stop
, stopc
);
4144 reloc
->u
.a
.sym
= NULL
;
4145 reloc
->u
.a
.addend
= 0;
4148 reloc
->u
.a
.sym
= NULL
;
4149 reloc
->u
.a
.addend
= exp
.X_add_number
;
4152 reloc
->u
.a
.sym
= exp
.X_add_symbol
;
4153 reloc
->u
.a
.addend
= exp
.X_add_number
;
4156 reloc
->u
.a
.sym
= make_expr_symbol (&exp
);
4157 reloc
->u
.a
.addend
= 0;
4161 as_where (&reloc
->file
, &reloc
->line
);
4162 reloc
->next
= reloc_list
;
4165 demand_empty_rest_of_line ();
4167 mri_comment_end (stop
, stopc
);
4170 /* Put the contents of expression EXP into the object file using
4171 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
4174 emit_expr (expressionS
*exp
, unsigned int nbytes
)
4176 emit_expr_with_reloc (exp
, nbytes
, TC_PARSE_CONS_RETURN_NONE
);
4180 emit_expr_with_reloc (expressionS
*exp
,
4181 unsigned int nbytes
,
4182 TC_PARSE_CONS_RETURN_TYPE reloc
)
4186 valueT extra_digit
= 0;
4188 /* Don't do anything if we are going to make another pass. */
4193 dot_value
= frag_now_fix ();
4194 dot_frag
= frag_now
;
4198 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
4199 appear as a four byte positive constant in the .line section,
4200 followed by a 2 byte 0xffff. Look for that case here. */
4202 static int dwarf_line
= -1;
4204 if (strcmp (segment_name (now_seg
), ".line") != 0)
4206 else if (dwarf_line
>= 0
4208 && exp
->X_op
== O_constant
4209 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
4210 listing_source_line ((unsigned int) dwarf_line
);
4211 else if (nbytes
== 4
4212 && exp
->X_op
== O_constant
4213 && exp
->X_add_number
>= 0)
4214 dwarf_line
= exp
->X_add_number
;
4219 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
4220 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
4221 AT_sibling (0x12) followed by a four byte address of the sibling
4222 followed by a 2 byte AT_name (0x38) followed by the name of the
4223 file. We look for that case here. */
4225 static int dwarf_file
= 0;
4227 if (strcmp (segment_name (now_seg
), ".debug") != 0)
4229 else if (dwarf_file
== 0
4231 && exp
->X_op
== O_constant
4232 && exp
->X_add_number
== 0x11)
4234 else if (dwarf_file
== 1
4236 && exp
->X_op
== O_constant
4237 && exp
->X_add_number
== 0x12)
4239 else if (dwarf_file
== 2
4242 else if (dwarf_file
== 3
4244 && exp
->X_op
== O_constant
4245 && exp
->X_add_number
== 0x38)
4250 /* The variable dwarf_file_string tells stringer that the string
4251 may be the name of the source file. */
4252 if (dwarf_file
== 4)
4253 dwarf_file_string
= 1;
4255 dwarf_file_string
= 0;
4260 if (check_eh_frame (exp
, &nbytes
))
4265 /* Handle a negative bignum. */
4267 && exp
->X_add_number
== 0
4268 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
4269 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
4272 unsigned long carry
;
4274 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
4276 /* Negate the bignum: one's complement each digit and add 1. */
4278 for (i
= 0; i
< exp
->X_add_number
; i
++)
4282 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
4285 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
4286 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
4289 /* We can ignore any carry out, because it will be handled by
4290 extra_digit if it is needed. */
4292 extra_digit
= (valueT
) -1;
4296 if (op
== O_absent
|| op
== O_illegal
)
4298 as_warn (_("zero assumed for missing expression"));
4299 exp
->X_add_number
= 0;
4302 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4304 as_bad (_("floating point number invalid"));
4305 exp
->X_add_number
= 0;
4308 else if (op
== O_register
)
4310 as_warn (_("register value used as expression"));
4314 /* Allow `.word 0' in the absolute section. */
4315 if (now_seg
== absolute_section
)
4317 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
4318 as_bad (_("attempt to store value in absolute section"));
4319 abs_section_offset
+= nbytes
;
4323 /* Allow `.word 0' in BSS style sections. */
4324 if ((op
!= O_constant
|| exp
->X_add_number
!= 0) && in_bss ())
4325 as_bad (_("attempt to store non-zero value in section `%s'"),
4326 segment_name (now_seg
));
4328 p
= frag_more ((int) nbytes
);
4330 if (reloc
!= TC_PARSE_CONS_RETURN_NONE
)
4332 emit_expr_fix (exp
, nbytes
, frag_now
, p
, reloc
);
4336 #ifndef WORKING_DOT_WORD
4337 /* If we have the difference of two symbols in a word, save it on
4338 the broken_words list. See the code in write.c. */
4339 if (op
== O_subtract
&& nbytes
== 2)
4341 struct broken_word
*x
;
4343 x
= (struct broken_word
*) xmalloc (sizeof (struct broken_word
));
4344 x
->next_broken_word
= broken_words
;
4347 x
->subseg
= now_subseg
;
4349 x
->word_goes_here
= p
;
4351 x
->add
= exp
->X_add_symbol
;
4352 x
->sub
= exp
->X_op_symbol
;
4353 x
->addnum
= exp
->X_add_number
;
4361 /* If we have an integer, but the number of bytes is too large to
4362 pass to md_number_to_chars, handle it as a bignum. */
4363 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
4365 extra_digit
= exp
->X_unsigned
? 0 : -1;
4366 convert_to_bignum (exp
, !exp
->X_unsigned
);
4370 if (op
== O_constant
)
4378 /* JF << of >= number of bits in the object is undefined. In
4379 particular SPARC (Sun 4) has problems. */
4380 if (nbytes
>= sizeof (valueT
))
4383 if (nbytes
> sizeof (valueT
))
4386 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
4390 /* Don't store these bits. */
4391 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
4392 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
4395 unmask
= ~mask
; /* Do store these bits. */
4398 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
4399 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
4402 get
= exp
->X_add_number
;
4404 if ((get
& mask
) != 0
4405 && ((get
& mask
) != mask
4406 || (get
& hibit
) == 0))
4407 { /* Leading bits contain both 0s & 1s. */
4408 #if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG
4410 as_warn (_("value 0x%llx truncated to 0x%llx"),
4411 (unsigned long long) get
, (unsigned long long) use
);
4413 as_warn (_("value 0x%I64x truncated to 0x%I64x"),
4414 (unsigned long long) get
, (unsigned long long) use
);
4417 as_warn (_("value 0x%lx truncated to 0x%lx"),
4418 (unsigned long) get
, (unsigned long) use
);
4421 /* Put bytes in right order. */
4422 md_number_to_chars (p
, use
, (int) nbytes
);
4424 else if (op
== O_big
)
4427 LITTLENUM_TYPE
*nums
;
4429 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
4432 int i
= nbytes
/ CHARS_PER_LITTLENUM
;
4435 LITTLENUM_TYPE sign
= 0;
4436 if ((generic_bignum
[--i
]
4437 & (1 << (LITTLENUM_NUMBER_OF_BITS
- 1))) != 0)
4438 sign
= ~(LITTLENUM_TYPE
) 0;
4439 while (++i
< exp
->X_add_number
)
4440 if (generic_bignum
[i
] != sign
)
4443 if (i
< exp
->X_add_number
)
4444 as_warn (_("bignum truncated to %d bytes"), nbytes
);
4450 md_number_to_chars (p
, (valueT
) generic_bignum
[0], 1);
4453 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
4455 if (target_big_endian
)
4457 while (nbytes
> size
)
4459 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4460 nbytes
-= CHARS_PER_LITTLENUM
;
4461 p
+= CHARS_PER_LITTLENUM
;
4464 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
4465 while (size
>= CHARS_PER_LITTLENUM
)
4468 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4469 size
-= CHARS_PER_LITTLENUM
;
4470 p
+= CHARS_PER_LITTLENUM
;
4475 nums
= generic_bignum
;
4476 while (size
>= CHARS_PER_LITTLENUM
)
4478 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4480 size
-= CHARS_PER_LITTLENUM
;
4481 p
+= CHARS_PER_LITTLENUM
;
4482 nbytes
-= CHARS_PER_LITTLENUM
;
4485 while (nbytes
>= CHARS_PER_LITTLENUM
)
4487 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4488 nbytes
-= CHARS_PER_LITTLENUM
;
4489 p
+= CHARS_PER_LITTLENUM
;
4494 emit_expr_fix (exp
, nbytes
, frag_now
, p
, TC_PARSE_CONS_RETURN_NONE
);
4498 emit_expr_fix (expressionS
*exp
, unsigned int nbytes
, fragS
*frag
, char *p
,
4499 TC_PARSE_CONS_RETURN_TYPE r ATTRIBUTE_UNUSED
)
4502 unsigned int size
= nbytes
;
4504 memset (p
, 0, size
);
4506 /* Generate a fixS to record the symbol value. */
4508 #ifdef TC_CONS_FIX_NEW
4509 TC_CONS_FIX_NEW (frag
, p
- frag
->fr_literal
+ offset
, size
, exp
, r
);
4511 if (r
!= TC_PARSE_CONS_RETURN_NONE
)
4513 reloc_howto_type
*reloc_howto
;
4515 reloc_howto
= bfd_reloc_type_lookup (stdoutput
, r
);
4516 size
= bfd_get_reloc_size (reloc_howto
);
4520 as_bad (_("%s relocations do not fit in %u bytes\n"),
4521 reloc_howto
->name
, nbytes
);
4524 else if (target_big_endian
)
4525 offset
= nbytes
- size
;
4546 as_bad (_("unsupported BFD relocation size %u"), size
);
4549 fix_new_exp (frag
, p
- frag
->fr_literal
+ offset
, size
,
4554 #ifdef BITFIELD_CONS_EXPRESSIONS
4556 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
4557 w:x,y:z, where w and y are bitwidths and x and y are values. They
4558 then pack them all together. We do a little better in that we allow
4559 them in words, longs, etc. and we'll pack them in target byte order
4562 The rules are: pack least significant bit first, if a field doesn't
4563 entirely fit, put it in the next unit. Overflowing the bitfield is
4564 explicitly *not* even a warning. The bitwidth should be considered
4567 To use this function the tc-XXX.h file should define
4568 BITFIELD_CONS_EXPRESSIONS. */
4571 parse_bitfield_cons (exp
, nbytes
)
4573 unsigned int nbytes
;
4575 unsigned int bits_available
= BITS_PER_CHAR
* nbytes
;
4576 char *hold
= input_line_pointer
;
4578 (void) expression (exp
);
4580 if (*input_line_pointer
== ':')
4587 unsigned long width
;
4589 if (*input_line_pointer
!= ':')
4591 input_line_pointer
= hold
;
4593 } /* Next piece is not a bitfield. */
4595 /* In the general case, we can't allow
4596 full expressions with symbol
4597 differences and such. The relocation
4598 entries for symbols not defined in this
4599 assembly would require arbitrary field
4600 widths, positions, and masks which most
4601 of our current object formats don't
4604 In the specific case where a symbol
4605 *is* defined in this assembly, we
4606 *could* build fixups and track it, but
4607 this could lead to confusion for the
4608 backends. I'm lazy. I'll take any
4609 SEG_ABSOLUTE. I think that means that
4610 you can use a previous .set or
4611 .equ type symbol. xoxorich. */
4613 if (exp
->X_op
== O_absent
)
4615 as_warn (_("using a bit field width of zero"));
4616 exp
->X_add_number
= 0;
4617 exp
->X_op
= O_constant
;
4618 } /* Implied zero width bitfield. */
4620 if (exp
->X_op
!= O_constant
)
4622 *input_line_pointer
= '\0';
4623 as_bad (_("field width \"%s\" too complex for a bitfield"), hold
);
4624 *input_line_pointer
= ':';
4625 demand_empty_rest_of_line ();
4627 } /* Too complex. */
4629 if ((width
= exp
->X_add_number
) > (BITS_PER_CHAR
* nbytes
))
4631 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4632 width
, nbytes
, (BITS_PER_CHAR
* nbytes
));
4633 width
= BITS_PER_CHAR
* nbytes
;
4636 if (width
> bits_available
)
4638 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4639 input_line_pointer
= hold
;
4640 exp
->X_add_number
= value
;
4645 hold
= ++input_line_pointer
;
4647 (void) expression (exp
);
4648 if (exp
->X_op
!= O_constant
)
4650 char cache
= *input_line_pointer
;
4652 *input_line_pointer
= '\0';
4653 as_bad (_("field value \"%s\" too complex for a bitfield"), hold
);
4654 *input_line_pointer
= cache
;
4655 demand_empty_rest_of_line ();
4657 } /* Too complex. */
4659 value
|= ((~(-(1 << width
)) & exp
->X_add_number
)
4660 << ((BITS_PER_CHAR
* nbytes
) - bits_available
));
4662 if ((bits_available
-= width
) == 0
4663 || is_it_end_of_statement ()
4664 || *input_line_pointer
!= ',')
4667 } /* All the bitfields we're gonna get. */
4669 hold
= ++input_line_pointer
;
4670 (void) expression (exp
);
4673 exp
->X_add_number
= value
;
4674 exp
->X_op
= O_constant
;
4675 exp
->X_unsigned
= 1;
4676 exp
->X_extrabit
= 0;
4680 #endif /* BITFIELD_CONS_EXPRESSIONS */
4682 /* Handle an MRI style string expression. */
4686 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
)
4688 if (*input_line_pointer
!= '\''
4689 && (input_line_pointer
[1] != '\''
4690 || (*input_line_pointer
!= 'A'
4691 && *input_line_pointer
!= 'E')))
4692 (void) TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
4696 unsigned int result
= 0;
4698 /* An MRI style string. Cut into as many bytes as will fit into
4699 a nbyte chunk, left justify if necessary, and separate with
4700 commas so we can try again later. */
4701 if (*input_line_pointer
== 'A')
4702 ++input_line_pointer
;
4703 else if (*input_line_pointer
== 'E')
4705 as_bad (_("EBCDIC constants are not supported"));
4706 ++input_line_pointer
;
4709 input_line_pointer
++;
4710 for (scan
= 0; scan
< nbytes
; scan
++)
4712 if (*input_line_pointer
== '\'')
4714 if (input_line_pointer
[1] == '\'')
4716 input_line_pointer
++;
4721 result
= (result
<< 8) | (*input_line_pointer
++);
4725 while (scan
< nbytes
)
4731 /* Create correct expression. */
4732 exp
->X_op
= O_constant
;
4733 exp
->X_add_number
= result
;
4735 /* Fake it so that we can read the next char too. */
4736 if (input_line_pointer
[0] != '\'' ||
4737 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
4739 input_line_pointer
-= 2;
4740 input_line_pointer
[0] = ',';
4741 input_line_pointer
[1] = '\'';
4744 input_line_pointer
++;
4747 #endif /* TC_M68K */
4749 #ifdef REPEAT_CONS_EXPRESSIONS
4751 /* Parse a repeat expression for cons. This is used by the MIPS
4752 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4753 object file COUNT times.
4755 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4758 parse_repeat_cons (exp
, nbytes
)
4760 unsigned int nbytes
;
4767 if (*input_line_pointer
!= ':')
4769 /* No repeat count. */
4773 ++input_line_pointer
;
4774 expression (&count
);
4775 if (count
.X_op
!= O_constant
4776 || count
.X_add_number
<= 0)
4778 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4782 /* The cons function is going to output this expression once. So we
4783 output it count - 1 times. */
4784 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
4785 emit_expr (exp
, nbytes
);
4788 #endif /* REPEAT_CONS_EXPRESSIONS */
4790 /* Parse a floating point number represented as a hex constant. This
4791 permits users to specify the exact bits they want in the floating
4795 hex_float (int float_type
, char *bytes
)
4827 as_bad (_("unknown floating type type '%c'"), float_type
);
4831 /* It would be nice if we could go through expression to parse the
4832 hex constant, but if we get a bignum it's a pain to sort it into
4833 the buffer correctly. */
4835 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4839 /* The MRI assembler accepts arbitrary underscores strewn about
4840 through the hex constant, so we ignore them as well. */
4841 if (*input_line_pointer
== '_')
4843 ++input_line_pointer
;
4849 as_warn (_("floating point constant too large"));
4852 d
= hex_value (*input_line_pointer
) << 4;
4853 ++input_line_pointer
;
4854 while (*input_line_pointer
== '_')
4855 ++input_line_pointer
;
4856 if (hex_p (*input_line_pointer
))
4858 d
+= hex_value (*input_line_pointer
);
4859 ++input_line_pointer
;
4861 if (target_big_endian
)
4864 bytes
[length
- i
- 1] = d
;
4870 if (target_big_endian
)
4871 memset (bytes
+ i
, 0, length
- i
);
4873 memset (bytes
, 0, length
- i
);
4881 CONStruct some more frag chars of .floats .ffloats etc.
4882 Makes 0 or more new frags.
4883 If need_pass_2 == 1, no frags are emitted.
4884 This understands only floating literals, not expressions. Sorry.
4886 A floating constant is defined by atof_generic(), except it is preceded
4887 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4888 reading, I decided to be incompatible. This always tries to give you
4889 rounded bits to the precision of the pseudo-op. Former AS did premature
4890 truncation, restored noisy bits instead of trailing 0s AND gave you
4891 a choice of 2 flavours of noise according to which of 2 floating-point
4892 scanners you directed AS to use.
4894 In: input_line_pointer->whitespace before, or '0' of flonum. */
4897 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4898 int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4901 int length
; /* Number of chars in an object. */
4902 char *err
; /* Error from scanning floating literal. */
4903 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4905 if (is_it_end_of_statement ())
4907 demand_empty_rest_of_line ();
4911 if (now_seg
== absolute_section
)
4913 as_bad (_("attempt to store float in absolute section"));
4914 ignore_rest_of_line ();
4920 as_bad (_("attempt to store float in section `%s'"),
4921 segment_name (now_seg
));
4922 ignore_rest_of_line ();
4926 #ifdef md_flush_pending_output
4927 md_flush_pending_output ();
4930 #ifdef md_cons_align
4936 /* input_line_pointer->1st char of a flonum (we hope!). */
4939 /* Skip any 0{letter} that may be present. Don't even check if the
4940 letter is legal. Someone may invent a "z" format and this routine
4941 has no use for such information. Lusers beware: you get
4942 diagnostics if your input is ill-conditioned. */
4943 if (input_line_pointer
[0] == '0'
4944 && ISALPHA (input_line_pointer
[1]))
4945 input_line_pointer
+= 2;
4947 /* Accept :xxxx, where the x's are hex digits, for a floating
4948 point with the exact digits specified. */
4949 if (input_line_pointer
[0] == ':')
4951 ++input_line_pointer
;
4952 length
= hex_float (float_type
, temp
);
4955 ignore_rest_of_line ();
4961 err
= md_atof (float_type
, temp
, &length
);
4962 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
4963 know (err
!= NULL
|| length
> 0);
4966 as_bad (_("bad floating literal: %s"), err
);
4967 ignore_rest_of_line ();
4978 #ifdef REPEAT_CONS_EXPRESSIONS
4979 if (*input_line_pointer
== ':')
4981 expressionS count_exp
;
4983 ++input_line_pointer
;
4984 expression (&count_exp
);
4986 if (count_exp
.X_op
!= O_constant
4987 || count_exp
.X_add_number
<= 0)
4988 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4990 count
= count_exp
.X_add_number
;
4994 while (--count
>= 0)
4996 p
= frag_more (length
);
4997 memcpy (p
, temp
, (unsigned int) length
);
5002 while (*input_line_pointer
++ == ',');
5004 /* Put terminator back into stream. */
5005 --input_line_pointer
;
5006 demand_empty_rest_of_line ();
5011 Note - we are using the DWARF standard's definition of LEB128 encoding
5012 where each 7-bit value is a stored in a byte, *not* an octet. This
5013 means that on targets where a byte contains multiple octets there is
5014 a *huge waste of space*. (This also means that we do not have to
5015 have special versions of these functions for when OCTETS_PER_BYTE_POWER
5018 If the 7-bit values were to be packed into N-bit bytes (where N > 8)
5019 we would then have to consider whether multiple, successive LEB128
5020 values should be packed into the bytes without padding (bad idea) or
5021 whether each LEB128 number is padded out to a whole number of bytes.
5022 Plus you have to decide on the endianness of packing octets into a
5025 /* Return the size of a LEB128 value in bytes. */
5027 static inline unsigned int
5028 sizeof_sleb128 (offsetT value
)
5035 byte
= (value
& 0x7f);
5036 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
5037 Fortunately, we can structure things so that the extra work reduces
5038 to a noop on systems that do things "properly". */
5039 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
5042 while (!(((value
== 0) && ((byte
& 0x40) == 0))
5043 || ((value
== -1) && ((byte
& 0x40) != 0))));
5048 static inline unsigned int
5049 sizeof_uleb128 (valueT value
)
5064 sizeof_leb128 (valueT value
, int sign
)
5067 return sizeof_sleb128 ((offsetT
) value
);
5069 return sizeof_uleb128 (value
);
5072 /* Output a LEB128 value. Returns the number of bytes used. */
5074 static inline unsigned int
5075 output_sleb128 (char *p
, offsetT value
)
5082 unsigned byte
= (value
& 0x7f);
5084 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
5085 Fortunately, we can structure things so that the extra work reduces
5086 to a noop on systems that do things "properly". */
5087 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
5089 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
5090 || ((value
== -1) && ((byte
& 0x40) != 0))));
5101 static inline unsigned int
5102 output_uleb128 (char *p
, valueT value
)
5108 unsigned byte
= (value
& 0x7f);
5112 /* More bytes to follow. */
5123 output_leb128 (char *p
, valueT value
, int sign
)
5126 return output_sleb128 (p
, (offsetT
) value
);
5128 return output_uleb128 (p
, value
);
5131 /* Do the same for bignums. We combine sizeof with output here in that
5132 we don't output for NULL values of P. It isn't really as critical as
5133 for "normal" values that this be streamlined. Returns the number of
5136 static inline unsigned int
5137 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
)
5144 /* Strip leading sign extensions off the bignum. */
5146 && bignum
[size
- 1] == LITTLENUM_MASK
5147 && bignum
[size
- 2] > LITTLENUM_MASK
/ 2)
5152 /* OR in the next part of the littlenum. */
5153 val
|= (*bignum
<< loaded
);
5154 loaded
+= LITTLENUM_NUMBER_OF_BITS
;
5158 /* Add bytes until there are less than 7 bits left in VAL
5159 or until every non-sign bit has been written. */
5166 || val
!= ((byte
& 0x40) == 0 ? 0 : ((valueT
) 1 << loaded
) - 1))
5173 while ((byte
& 0x80) != 0 && loaded
>= 7);
5177 /* Mop up any left-over bits (of which there will be less than 7). */
5178 if ((byte
& 0x80) != 0)
5180 /* Sign-extend VAL. */
5181 if (val
& (1 << (loaded
- 1)))
5182 val
|= ~0U << loaded
;
5191 static inline unsigned int
5192 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
)
5199 /* Strip leading zeros off the bignum. */
5200 /* XXX: Is this needed? */
5201 while (size
> 0 && bignum
[size
- 1] == 0)
5206 if (loaded
< 7 && size
> 0)
5208 val
|= (*bignum
<< loaded
);
5209 loaded
+= 8 * CHARS_PER_LITTLENUM
;
5218 if (size
> 0 || val
)
5225 while (byte
& 0x80);
5231 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
, int sign
)
5234 return output_big_sleb128 (p
, bignum
, size
);
5236 return output_big_uleb128 (p
, bignum
, size
);
5239 /* Generate the appropriate fragments for a given expression to emit a
5240 leb128 value. SIGN is 1 for sleb, 0 for uleb. */
5243 emit_leb128_expr (expressionS
*exp
, int sign
)
5245 operatorT op
= exp
->X_op
;
5246 unsigned int nbytes
;
5248 if (op
== O_absent
|| op
== O_illegal
)
5250 as_warn (_("zero assumed for missing expression"));
5251 exp
->X_add_number
= 0;
5254 else if (op
== O_big
&& exp
->X_add_number
<= 0)
5256 as_bad (_("floating point number invalid"));
5257 exp
->X_add_number
= 0;
5260 else if (op
== O_register
)
5262 as_warn (_("register value used as expression"));
5265 else if (op
== O_constant
5267 && (exp
->X_add_number
< 0) == !exp
->X_extrabit
)
5269 /* We're outputting a signed leb128 and the sign of X_add_number
5270 doesn't reflect the sign of the original value. Convert EXP
5271 to a correctly-extended bignum instead. */
5272 convert_to_bignum (exp
, exp
->X_extrabit
);
5276 if (now_seg
== absolute_section
)
5278 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
5279 as_bad (_("attempt to store value in absolute section"));
5280 abs_section_offset
++;
5284 if ((op
!= O_constant
|| exp
->X_add_number
!= 0) && in_bss ())
5285 as_bad (_("attempt to store non-zero value in section `%s'"),
5286 segment_name (now_seg
));
5288 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
5289 a signal that this is leb128 data. It shouldn't optimize this away. */
5290 nbytes
= (unsigned int) -1;
5291 if (check_eh_frame (exp
, &nbytes
))
5294 /* Let the backend know that subsequent data may be byte aligned. */
5295 #ifdef md_cons_align
5299 if (op
== O_constant
)
5301 /* If we've got a constant, emit the thing directly right now. */
5303 valueT value
= exp
->X_add_number
;
5307 size
= sizeof_leb128 (value
, sign
);
5308 p
= frag_more (size
);
5309 if (output_leb128 (p
, value
, sign
) > size
)
5312 else if (op
== O_big
)
5314 /* O_big is a different sort of constant. */
5319 size
= output_big_leb128 (NULL
, generic_bignum
, exp
->X_add_number
, sign
);
5320 p
= frag_more (size
);
5321 if (output_big_leb128 (p
, generic_bignum
, exp
->X_add_number
, sign
) > size
)
5326 /* Otherwise, we have to create a variable sized fragment and
5327 resolve things later. */
5329 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
5330 make_expr_symbol (exp
), 0, (char *) NULL
);
5334 /* Parse the .sleb128 and .uleb128 pseudos. */
5341 #ifdef md_flush_pending_output
5342 md_flush_pending_output ();
5348 emit_leb128_expr (&exp
, sign
);
5350 while (*input_line_pointer
++ == ',');
5352 input_line_pointer
--;
5353 demand_empty_rest_of_line ();
5357 stringer_append_char (int c
, int bitsize
)
5360 as_bad (_("attempt to store non-empty string in section `%s'"),
5361 segment_name (now_seg
));
5363 if (!target_big_endian
)
5364 FRAG_APPEND_1_CHAR (c
);
5369 FRAG_APPEND_1_CHAR (0);
5370 FRAG_APPEND_1_CHAR (0);
5371 FRAG_APPEND_1_CHAR (0);
5372 FRAG_APPEND_1_CHAR (0);
5375 FRAG_APPEND_1_CHAR (0);
5376 FRAG_APPEND_1_CHAR (0);
5379 FRAG_APPEND_1_CHAR (0);
5384 /* Called with invalid bitsize argument. */
5388 if (target_big_endian
)
5389 FRAG_APPEND_1_CHAR (c
);
5392 /* Worker to do .ascii etc statements.
5393 Reads 0 or more ',' separated, double-quoted strings.
5394 Caller should have checked need_pass_2 is FALSE because we don't
5396 Checks for end-of-line.
5397 BITS_APPENDZERO says how many bits are in a target char.
5398 The bottom bit is set if a NUL char should be appended to the strings. */
5401 stringer (int bits_appendzero
)
5403 const int bitsize
= bits_appendzero
& ~7;
5404 const int append_zero
= bits_appendzero
& 1;
5406 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5410 #ifdef md_flush_pending_output
5411 md_flush_pending_output ();
5414 #ifdef md_cons_align
5418 /* If we have been switched into the abs_section then we
5419 will not have an obstack onto which we can hang strings. */
5420 if (now_seg
== absolute_section
)
5422 as_bad (_("strings must be placed into a section"));
5423 ignore_rest_of_line ();
5427 /* The following awkward logic is to parse ZERO or more strings,
5428 comma separated. Recall a string expression includes spaces
5429 before the opening '\"' and spaces after the closing '\"'.
5430 We fake a leading ',' if there is (supposed to be)
5431 a 1st, expression. We keep demanding expressions for each ','. */
5432 if (is_it_end_of_statement ())
5434 c
= 0; /* Skip loop. */
5435 ++input_line_pointer
; /* Compensate for end of loop. */
5439 c
= ','; /* Do loop. */
5442 while (c
== ',' || c
== '<' || c
== '"')
5445 switch (*input_line_pointer
)
5448 ++input_line_pointer
; /*->1st char of string. */
5449 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5450 start
= input_line_pointer
;
5453 while (is_a_char (c
= next_char_of_string ()))
5454 stringer_append_char (c
, bitsize
);
5457 stringer_append_char (0, bitsize
);
5459 know (input_line_pointer
[-1] == '\"');
5461 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5462 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
5463 will emit .string with a filename in the .debug section
5464 after a sequence of constants. See the comment in
5465 emit_expr for the sequence. emit_expr will set
5466 dwarf_file_string to non-zero if this string might be a
5467 source file name. */
5468 if (strcmp (segment_name (now_seg
), ".debug") != 0)
5469 dwarf_file_string
= 0;
5470 else if (dwarf_file_string
)
5472 c
= input_line_pointer
[-1];
5473 input_line_pointer
[-1] = '\0';
5474 listing_source_file (start
);
5475 input_line_pointer
[-1] = c
;
5481 input_line_pointer
++;
5482 c
= get_single_number ();
5483 stringer_append_char (c
, bitsize
);
5484 if (*input_line_pointer
!= '>')
5485 as_bad (_("expected <nn>"));
5487 input_line_pointer
++;
5490 input_line_pointer
++;
5494 c
= *input_line_pointer
;
5497 demand_empty_rest_of_line ();
5500 /* FIXME-SOMEDAY: I had trouble here on characters with the
5501 high bits set. We'll probably also have trouble with
5502 multibyte chars, wide chars, etc. Also be careful about
5503 returning values bigger than 1 byte. xoxorich. */
5506 next_char_of_string (void)
5510 c
= *input_line_pointer
++ & CHAR_MASK
;
5518 as_warn (_("unterminated string; newline inserted"));
5519 bump_line_counters ();
5522 #ifndef NO_STRING_ESCAPES
5524 switch (c
= *input_line_pointer
++ & CHAR_MASK
)
5552 break; /* As itself. */
5568 for (i
= 0, number
= 0;
5569 ISDIGIT (c
) && i
< 3;
5570 c
= *input_line_pointer
++, i
++)
5572 number
= number
* 8 + c
- '0';
5575 c
= number
& CHAR_MASK
;
5577 --input_line_pointer
;
5586 c
= *input_line_pointer
++;
5587 while (ISXDIGIT (c
))
5590 number
= number
* 16 + c
- '0';
5591 else if (ISUPPER (c
))
5592 number
= number
* 16 + c
- 'A' + 10;
5594 number
= number
* 16 + c
- 'a' + 10;
5595 c
= *input_line_pointer
++;
5597 c
= number
& CHAR_MASK
;
5598 --input_line_pointer
;
5603 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
5604 as_warn (_("unterminated string; newline inserted"));
5606 bump_line_counters ();
5611 #ifdef ONLY_STANDARD_ESCAPES
5612 as_bad (_("bad escaped character in string"));
5614 #endif /* ONLY_STANDARD_ESCAPES */
5619 #endif /* ! defined (NO_STRING_ESCAPES) */
5628 get_segmented_expression (expressionS
*expP
)
5632 retval
= expression (expP
);
5633 if (expP
->X_op
== O_illegal
5634 || expP
->X_op
== O_absent
5635 || expP
->X_op
== O_big
)
5637 as_bad (_("expected address expression"));
5638 expP
->X_op
= O_constant
;
5639 expP
->X_add_number
= 0;
5640 retval
= absolute_section
;
5646 get_known_segmented_expression (expressionS
*expP
)
5648 segT retval
= get_segmented_expression (expP
);
5650 if (retval
== undefined_section
)
5652 /* There is no easy way to extract the undefined symbol from the
5654 if (expP
->X_add_symbol
!= NULL
5655 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
5656 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5657 S_GET_NAME (expP
->X_add_symbol
));
5659 as_warn (_("some symbol undefined; zero assumed"));
5660 retval
= absolute_section
;
5661 expP
->X_op
= O_constant
;
5662 expP
->X_add_number
= 0;
5667 char /* Return terminator. */
5668 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
5670 /* FIXME: val_pointer should probably be offsetT *. */
5671 *val_pointer
= (long) get_absolute_expression ();
5672 return (*input_line_pointer
++);
5675 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
5676 Give a warning if that happens. */
5679 demand_copy_C_string (int *len_pointer
)
5683 if ((s
= demand_copy_string (len_pointer
)) != 0)
5687 for (len
= *len_pointer
; len
> 0; len
--)
5694 as_bad (_("this string may not contain \'\\0\'"));
5702 /* Demand string, but return a safe (=private) copy of the string.
5703 Return NULL if we can't read a string here. */
5706 demand_copy_string (int *lenP
)
5714 if (*input_line_pointer
== '\"')
5716 input_line_pointer
++; /* Skip opening quote. */
5718 while (is_a_char (c
= next_char_of_string ()))
5720 obstack_1grow (¬es
, c
);
5723 /* JF this next line is so demand_copy_C_string will return a
5724 null terminated string. */
5725 obstack_1grow (¬es
, '\0');
5726 retval
= (char *) obstack_finish (¬es
);
5730 as_bad (_("missing string"));
5732 ignore_rest_of_line ();
5738 /* In: Input_line_pointer->next character.
5740 Do: Skip input_line_pointer over all whitespace.
5742 Out: 1 if input_line_pointer->end-of-line. */
5745 is_it_end_of_statement (void)
5748 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
5752 equals (char *sym_name
, int reassign
)
5757 input_line_pointer
++;
5758 if (*input_line_pointer
== '=')
5759 input_line_pointer
++;
5760 if (reassign
< 0 && *input_line_pointer
== '=')
5761 input_line_pointer
++;
5763 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
5764 input_line_pointer
++;
5767 stop
= mri_comment_field (&stopc
);
5769 assign_symbol (sym_name
, reassign
>= 0 ? !reassign
: reassign
);
5773 demand_empty_rest_of_line ();
5774 mri_comment_end (stop
, stopc
);
5778 /* .incbin -- include a file verbatim at the current location. */
5781 s_incbin (int x ATTRIBUTE_UNUSED
)
5792 #ifdef md_flush_pending_output
5793 md_flush_pending_output ();
5796 #ifdef md_cons_align
5801 filename
= demand_copy_string (& len
);
5802 if (filename
== NULL
)
5807 /* Look for optional skip and count. */
5808 if (* input_line_pointer
== ',')
5810 ++ input_line_pointer
;
5811 skip
= get_absolute_expression ();
5815 if (* input_line_pointer
== ',')
5817 ++ input_line_pointer
;
5819 count
= get_absolute_expression ();
5821 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
5827 demand_empty_rest_of_line ();
5829 /* Try opening absolute path first, then try include dirs. */
5830 binfile
= fopen (filename
, FOPEN_RB
);
5831 if (binfile
== NULL
)
5835 path
= (char *) xmalloc ((unsigned long) len
+ include_dir_maxlen
+ 5);
5837 for (i
= 0; i
< include_dir_count
; i
++)
5839 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
5841 binfile
= fopen (path
, FOPEN_RB
);
5842 if (binfile
!= NULL
)
5846 if (binfile
== NULL
)
5847 as_bad (_("file not found: %s"), filename
);
5850 path
= xstrdup (filename
);
5856 register_dependency (path
);
5858 /* Compute the length of the file. */
5859 if (fseek (binfile
, 0, SEEK_END
) != 0)
5861 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
5864 file_len
= ftell (binfile
);
5866 /* If a count was not specified use the remainder of the file. */
5868 count
= file_len
- skip
;
5870 if (skip
< 0 || count
< 0 || file_len
< 0 || skip
+ count
> file_len
)
5872 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5873 skip
, count
, file_len
);
5877 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
5879 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
5883 /* Allocate frag space and store file contents in it. */
5884 binfrag
= frag_more (count
);
5886 bytes
= fread (binfrag
, 1, count
, binfile
);
5888 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5889 path
, bytes
, count
);
5892 if (binfile
!= NULL
)
5898 /* .include -- include a file at this point. */
5901 s_include (int arg ATTRIBUTE_UNUSED
)
5910 filename
= demand_copy_string (&i
);
5911 if (filename
== NULL
)
5913 /* demand_copy_string has already printed an error and
5914 called ignore_rest_of_line. */
5922 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
5923 && *input_line_pointer
!= ' '
5924 && *input_line_pointer
!= '\t')
5926 obstack_1grow (¬es
, *input_line_pointer
);
5927 ++input_line_pointer
;
5931 obstack_1grow (¬es
, '\0');
5932 filename
= (char *) obstack_finish (¬es
);
5933 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5934 ++input_line_pointer
;
5937 demand_empty_rest_of_line ();
5938 path
= (char *) xmalloc ((unsigned long) i
5939 + include_dir_maxlen
+ 5 /* slop */ );
5941 for (i
= 0; i
< include_dir_count
; i
++)
5943 strcpy (path
, include_dirs
[i
]);
5945 strcat (path
, filename
);
5946 if (0 != (try_file
= fopen (path
, FOPEN_RT
)))
5956 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5957 register_dependency (path
);
5958 input_scrub_insert_file (path
);
5962 add_include_dir (char *path
)
5966 if (include_dir_count
== 0)
5968 include_dirs
= (char **) xmalloc (2 * sizeof (*include_dirs
));
5969 include_dirs
[0] = "."; /* Current dir. */
5970 include_dir_count
= 2;
5974 include_dir_count
++;
5976 (char **) xrealloc (include_dirs
,
5977 include_dir_count
* sizeof (*include_dirs
));
5980 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
5983 if (i
> include_dir_maxlen
)
5984 include_dir_maxlen
= i
;
5987 /* Output debugging information to denote the source file. */
5990 generate_file_debug (void)
5992 if (debug_type
== DEBUG_STABS
)
5993 stabs_generate_asm_file ();
5996 /* Output line number debugging information for the current source line. */
5999 generate_lineno_debug (void)
6003 case DEBUG_UNSPECIFIED
:
6008 stabs_generate_asm_lineno ();
6011 ecoff_generate_asm_lineno ();
6014 /* ??? We could here indicate to dwarf2dbg.c that something
6015 has changed. However, since there is additional backend
6016 support that is required (calling dwarf2_emit_insn), we
6017 let dwarf2dbg.c call as_where on its own. */
6022 /* Output debugging information to mark a function entry point or end point.
6023 END_P is zero for .func, and non-zero for .endfunc. */
6028 do_s_func (end_p
, NULL
);
6031 /* Subroutine of s_func so targets can choose a different default prefix.
6032 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
6035 do_s_func (int end_p
, const char *default_prefix
)
6037 /* Record the current function so that we can issue an error message for
6038 misplaced .func,.endfunc, and also so that .endfunc needs no
6040 static char *current_name
;
6041 static char *current_label
;
6045 if (current_name
== NULL
)
6047 as_bad (_("missing .func"));
6048 ignore_rest_of_line ();
6052 if (debug_type
== DEBUG_STABS
)
6053 stabs_generate_asm_endfunc (current_name
, current_label
);
6055 current_name
= current_label
= NULL
;
6060 char delim1
, delim2
;
6062 if (current_name
!= NULL
)
6064 as_bad (_(".endfunc missing for previous .func"));
6065 ignore_rest_of_line ();
6069 delim1
= get_symbol_name (& name
);
6070 name
= xstrdup (name
);
6071 *input_line_pointer
= delim1
;
6072 SKIP_WHITESPACE_AFTER_NAME ();
6073 if (*input_line_pointer
!= ',')
6077 if (asprintf (&label
, "%s%s", default_prefix
, name
) == -1)
6078 as_fatal ("%s", xstrerror (errno
));
6082 char leading_char
= bfd_get_symbol_leading_char (stdoutput
);
6083 /* Missing entry point, use function's name with the leading
6087 if (asprintf (&label
, "%c%s", leading_char
, name
) == -1)
6088 as_fatal ("%s", xstrerror (errno
));
6096 ++input_line_pointer
;
6098 delim2
= get_symbol_name (& label
);
6099 label
= xstrdup (label
);
6100 restore_line_pointer (delim2
);
6103 if (debug_type
== DEBUG_STABS
)
6104 stabs_generate_asm_func (name
, label
);
6106 current_name
= name
;
6107 current_label
= label
;
6110 demand_empty_rest_of_line ();
6113 #ifdef HANDLE_BUNDLE
6116 s_bundle_align_mode (int arg ATTRIBUTE_UNUSED
)
6118 unsigned int align
= get_absolute_expression ();
6120 demand_empty_rest_of_line ();
6122 if (align
> (unsigned int) TC_ALIGN_LIMIT
)
6123 as_fatal (_(".bundle_align_mode alignment too large (maximum %u)"),
6124 (unsigned int) TC_ALIGN_LIMIT
);
6126 if (bundle_lock_frag
!= NULL
)
6128 as_bad (_("cannot change .bundle_align_mode inside .bundle_lock"));
6132 bundle_align_p2
= align
;
6136 s_bundle_lock (int arg ATTRIBUTE_UNUSED
)
6138 demand_empty_rest_of_line ();
6140 if (bundle_align_p2
== 0)
6142 as_bad (_(".bundle_lock is meaningless without .bundle_align_mode"));
6146 if (bundle_lock_depth
== 0)
6148 bundle_lock_frchain
= frchain_now
;
6149 bundle_lock_frag
= start_bundle ();
6151 ++bundle_lock_depth
;
6155 s_bundle_unlock (int arg ATTRIBUTE_UNUSED
)
6159 demand_empty_rest_of_line ();
6161 if (bundle_lock_frag
== NULL
)
6163 as_bad (_(".bundle_unlock without preceding .bundle_lock"));
6167 gas_assert (bundle_align_p2
> 0);
6169 gas_assert (bundle_lock_depth
> 0);
6170 if (--bundle_lock_depth
> 0)
6173 size
= pending_bundle_size (bundle_lock_frag
);
6175 if (size
> (1U << bundle_align_p2
))
6176 as_bad (_(".bundle_lock sequence is %u bytes, but bundle size only %u"),
6177 size
, 1 << bundle_align_p2
);
6179 finish_bundle (bundle_lock_frag
, size
);
6181 bundle_lock_frag
= NULL
;
6182 bundle_lock_frchain
= NULL
;
6185 #endif /* HANDLE_BUNDLE */
6188 s_ignore (int arg ATTRIBUTE_UNUSED
)
6190 ignore_rest_of_line ();
6194 read_print_statistics (FILE *file
)
6196 hash_print_statistics (file
, "pseudo-op table", po_hash
);
6199 /* Inserts the given line into the input stream.
6201 This call avoids macro/conditionals nesting checking, since the contents of
6202 the line are assumed to replace the contents of a line already scanned.
6204 An appropriate use of this function would be substitution of input lines when
6205 called by md_start_line_hook(). The given line is assumed to already be
6206 properly scrubbed. */
6209 input_scrub_insert_line (const char *line
)
6212 size_t len
= strlen (line
);
6213 sb_build (&newline
, len
);
6214 sb_add_buffer (&newline
, line
, len
);
6215 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
6217 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
6220 /* Insert a file into the input stream; the path must resolve to an actual
6221 file; no include path searching or dependency registering is performed. */
6224 input_scrub_insert_file (char *path
)
6226 input_scrub_include_file (path
, input_line_pointer
);
6227 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
6230 /* Find the end of a line, considering quotation and escaping of quotes. */
6232 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
6233 # define TC_SINGLE_QUOTE_STRINGS 1
6237 _find_end_of_line (char *s
, int mri_string
, int insn ATTRIBUTE_UNUSED
,
6240 char inquote
= '\0';
6243 while (!is_end_of_line
[(unsigned char) *s
]
6244 || (inquote
&& !ISCNTRL (*s
))
6245 || (inquote
== '\'' && flag_mri
)
6246 #ifdef TC_EOL_IN_INSN
6247 || (insn
&& TC_EOL_IN_INSN (s
))
6249 /* PR 6926: When we are parsing the body of a macro the sequence
6250 \@ is special - it refers to the invocation count. If the @
6251 character happens to be registered as a line-separator character
6252 by the target, then the is_end_of_line[] test above will have
6253 returned true, but we need to ignore the line separating
6254 semantics in this particular case. */
6255 || (in_macro
&& inescape
&& *s
== '@')
6258 if (mri_string
&& *s
== '\'')
6262 else if (*s
== '\\')
6266 #ifdef TC_SINGLE_QUOTE_STRINGS
6267 || (TC_SINGLE_QUOTE_STRINGS
&& *s
== '\'')
6274 as_warn (_("missing closing `%c'"), inquote
);
6275 if (inescape
&& !ignore_input ())
6276 as_warn (_("stray `\\'"));
6281 find_end_of_line (char *s
, int mri_string
)
6283 return _find_end_of_line (s
, mri_string
, 0, 0);