1 /* read.c - read a source file -
2 Copyright (C) 1986-2022 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 supposed 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"
45 #ifndef TC_START_LABEL
46 #define TC_START_LABEL(STR, NUL_CHAR, NEXT_CHAR) (NEXT_CHAR == ':')
49 /* Set by the object-format or the target. */
50 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
51 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
56 else if ((SIZE) >= 4) \
58 else if ((SIZE) >= 2) \
66 char *input_line_pointer
; /*->next char of source file to parse. */
67 bool input_from_string
= false;
69 #if BITS_PER_CHAR != 8
70 /* The following table is indexed by[(char)] and will break if
71 a char does not have exactly 256 states (hopefully 0:255!)! */
80 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
85 /* The Delta 68k assembler permits % inside label names. */
90 /* The PowerPC Windows NT assemblers permits ? inside label names. */
95 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
96 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
105 /* The Delta 68k assembler permits ~ at start of label names. */
109 /* Used by is_... macros. our ctype[]. */
110 char lex_type
[256] = {
111 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
112 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
113 0, 0, 0, LEX_HASH
, LEX_DOLLAR
, LEX_PCT
, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
114 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM
, /* 0123456789:;<=>? */
115 LEX_AT
, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
116 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, 0, 3, /* PQRSTUVWXYZ[\]^_ */
117 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
118 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, LEX_TILDE
, 0, /* pqrstuvwxyz{|}~. */
119 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
120 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
121 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
122 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
123 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
124 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
125 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
126 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
130 Out: 1 if this character ends a line.
131 2 if this character is a line separator. */
132 char is_end_of_line
[256] = {
134 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
136 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
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, /* 0123456789:;<=>? */
141 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
142 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
143 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
144 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
145 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
146 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
147 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
148 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
150 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
151 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
152 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
155 #ifndef TC_CASE_SENSITIVE
156 char original_case_string
[128];
159 /* Functions private to this file. */
161 static char *buffer
; /* 1st char of each buffer of lines is here. */
162 static char *buffer_limit
; /*->1 + last char in buffer. */
164 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
165 in the tc-<CPU>.h file. See the "Porting GAS" section of the
167 int target_big_endian
= TARGET_BYTES_BIG_ENDIAN
;
169 /* Variables for handling include file directory table. */
171 /* Table of pointers to directories to search for .include's. */
172 const char **include_dirs
;
174 /* How many are in the table. */
175 int include_dir_count
;
177 /* Length of longest in table. */
178 int include_dir_maxlen
= 1;
180 #ifndef WORKING_DOT_WORD
181 struct broken_word
*broken_words
;
182 int new_broken_words
;
185 /* The current offset into the absolute section. We don't try to
186 build frags in the absolute section, since no data can be stored
187 there. We just keep track of the current offset. */
188 addressT abs_section_offset
;
190 /* If this line had an MRI style label, it is stored in this variable.
191 This is used by some of the MRI pseudo-ops. */
194 /* This global variable is used to support MRI common sections. We
195 translate such sections into a common symbol. This variable is
196 non-NULL when we are in an MRI common section. */
197 symbolS
*mri_common_symbol
;
199 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
200 need to align to an even byte boundary unless the next pseudo-op is
201 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
203 static int mri_pending_align
;
207 /* This variable is set to be non-zero if the next string we see might
208 be the name of the source file in DWARF debugging information. See
209 the comment in emit_expr for the format we look for. */
210 static int dwarf_file_string
;
214 /* If the target defines the md_frag_max_var hook then we know
215 enough to implement the .bundle_align_mode features. */
216 #ifdef md_frag_max_var
217 # define HANDLE_BUNDLE
221 /* .bundle_align_mode sets this. Normally it's zero. When nonzero,
222 it's the exponent of the bundle size, and aligned instruction bundle
223 mode is in effect. */
224 static unsigned int bundle_align_p2
;
226 /* These are set by .bundle_lock and .bundle_unlock. .bundle_lock sets
227 bundle_lock_frag to frag_now and then starts a new frag with
228 frag_align_code. At the same time, bundle_lock_frain gets frchain_now,
229 so that .bundle_unlock can verify that we didn't change segments.
230 .bundle_unlock resets both to NULL. If we detect a bundling violation,
231 then we reset bundle_lock_frchain to NULL as an indicator that we've
232 already diagnosed the error with as_bad and don't need a cascade of
233 redundant errors, but bundle_lock_frag remains set to indicate that
234 we are expecting to see .bundle_unlock. */
235 static fragS
*bundle_lock_frag
;
236 static frchainS
*bundle_lock_frchain
;
238 /* This is incremented by .bundle_lock and decremented by .bundle_unlock,
240 static unsigned int bundle_lock_depth
;
243 static void do_s_func (int end_p
, const char *default_prefix
);
244 static void s_align (int, int);
245 static void s_altmacro (int);
246 static void s_bad_end (int);
247 static void s_reloc (int);
248 static int hex_float (int, char *);
249 static segT
get_known_segmented_expression (expressionS
* expP
);
250 static void pobegin (void);
251 static size_t get_non_macro_line_sb (sb
*);
252 static void generate_file_debug (void);
253 static char *_find_end_of_line (char *, int, int, int);
261 obj_read_begin_hook ();
263 /* Something close -- but not too close -- to a multiple of 1024.
264 The debugging malloc I'm using has 24 bytes of overhead. */
265 obstack_begin (¬es
, chunksize
);
266 obstack_begin (&cond_obstack
, chunksize
);
268 #ifndef tc_line_separator_chars
269 #define tc_line_separator_chars line_separator_chars
271 /* Use machine dependent syntax. */
272 for (p
= tc_line_separator_chars
; *p
; p
++)
273 is_end_of_line
[(unsigned char) *p
] = 2;
274 /* Use more. FIXME-SOMEDAY. */
280 #ifndef TC_ADDRESS_BYTES
281 #define TC_ADDRESS_BYTES address_bytes
286 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
287 contain an address. */
288 int n
= (stdoutput
->arch_info
->bits_per_address
- 1) / 8;
296 /* Set up pseudo-op tables. */
300 const char *poc_name
;
302 const pseudo_typeS
*pop
;
305 typedef struct po_entry po_entry_t
;
307 /* Hash function for a po_entry. */
310 hash_po_entry (const void *e
)
312 const po_entry_t
*entry
= (const po_entry_t
*) e
;
313 return htab_hash_string (entry
->poc_name
);
316 /* Equality function for a po_entry. */
319 eq_po_entry (const void *a
, const void *b
)
321 const po_entry_t
*ea
= (const po_entry_t
*) a
;
322 const po_entry_t
*eb
= (const po_entry_t
*) b
;
324 return strcmp (ea
->poc_name
, eb
->poc_name
) == 0;
328 po_entry_alloc (const char *poc_name
, const pseudo_typeS
*pop
)
330 po_entry_t
*entry
= XNEW (po_entry_t
);
331 entry
->poc_name
= poc_name
;
336 static const pseudo_typeS
*
337 po_entry_find (htab_t table
, const char *poc_name
)
339 po_entry_t needle
= { poc_name
, NULL
};
340 po_entry_t
*entry
= htab_find (table
, &needle
);
341 return entry
!= NULL
? entry
->pop
: NULL
;
344 static struct htab
*po_hash
;
346 static const pseudo_typeS potable
[] = {
347 {"abort", s_abort
, 0},
348 {"align", s_align_ptwo
, 0},
349 {"altmacro", s_altmacro
, 1},
350 {"ascii", stringer
, 8+0},
351 {"asciz", stringer
, 8+1},
352 {"balign", s_align_bytes
, 0},
353 {"balignw", s_align_bytes
, -2},
354 {"balignl", s_align_bytes
, -4},
357 {"bundle_align_mode", s_bundle_align_mode
, 0},
358 {"bundle_lock", s_bundle_lock
, 0},
359 {"bundle_unlock", s_bundle_unlock
, 0},
363 {"common", s_mri_common
, 0},
364 {"common.s", s_mri_common
, 1},
369 {"dc.d", float_cons
, 'd'},
371 {"dc.s", float_cons
, 'f'},
373 {"dc.x", float_cons
, 'x'},
375 {"dcb.b", s_space
, 1},
376 {"dcb.d", s_float_space
, 'd'},
377 {"dcb.l", s_space
, 4},
378 {"dcb.s", s_float_space
, 'f'},
379 {"dcb.w", s_space
, 2},
380 {"dcb.x", s_float_space
, 'x'},
382 {"ds.b", s_space
, 1},
383 {"ds.d", s_space
, 8},
384 {"ds.l", s_space
, 4},
385 {"ds.p", s_space
, 'p'},
386 {"ds.s", s_space
, 4},
387 {"ds.w", s_space
, 2},
388 {"ds.x", s_space
, 'x'},
389 {"debug", s_ignore
, 0},
394 {"double", float_cons
, 'd'},
396 {"eject", listing_eject
, 0}, /* Formfeed listing. */
398 {"elsec", s_else
, 0},
399 {"elseif", s_elseif
, (int) O_ne
},
401 {"endc", s_endif
, 0},
402 {"endfunc", s_func
, 1},
403 {"endif", s_endif
, 0},
404 {"endm", s_bad_end
, 0},
405 {"endr", s_bad_end
, 1},
411 {"error", s_errwarn
, 1},
412 {"exitm", s_mexit
, 0},
414 {"extern", s_ignore
, 0}, /* We treat all undef as ext. */
415 {"appfile", s_app_file
, 1},
416 {"appline", s_app_line
, 1},
418 {"file", s_app_file
, 0},
420 {"float", float_cons
, 'f'},
421 {"format", s_ignore
, 0},
423 {"global", s_globl
, 0},
424 {"globl", s_globl
, 0},
426 {"if", s_if
, (int) O_ne
},
429 {"ifdef", s_ifdef
, 0},
430 {"ifeq", s_if
, (int) O_eq
},
431 {"ifeqs", s_ifeqs
, 0},
432 {"ifge", s_if
, (int) O_ge
},
433 {"ifgt", s_if
, (int) O_gt
},
434 {"ifle", s_if
, (int) O_le
},
435 {"iflt", s_if
, (int) O_lt
},
438 {"ifndef", s_ifdef
, 1},
439 {"ifne", s_if
, (int) O_ne
},
440 {"ifnes", s_ifeqs
, 1},
441 {"ifnotdef", s_ifdef
, 1},
442 {"incbin", s_incbin
, 0},
443 {"include", s_include
, 0},
449 {"lcomm", s_lcomm
, 0},
450 {"lflags", s_ignore
, 0}, /* Listing flags. */
451 {"linefile", s_app_line
, 0},
452 {"linkonce", s_linkonce
, 0},
453 {"list", listing_list
, 1}, /* Turn listing on. */
454 {"llen", listing_psize
, 1},
457 {"macro", s_macro
, 0},
458 {"mexit", s_mexit
, 0},
460 {".mri", s_mri
, 0}, /* Special case so .mri works in MRI mode. */
461 {"name", s_ignore
, 0},
462 {"noaltmacro", s_altmacro
, 0},
463 {"noformat", s_ignore
, 0},
464 {"nolist", listing_list
, 0}, /* Turn listing off. */
465 {"nopage", listing_nopage
, 0},
469 {"offset", s_struct
, 0},
471 {"p2align", s_align_ptwo
, 0},
472 {"p2alignw", s_align_ptwo
, -2},
473 {"p2alignl", s_align_ptwo
, -4},
474 {"page", listing_eject
, 0},
475 {"plen", listing_psize
, 0},
476 {"print", s_print
, 0},
477 {"psize", listing_psize
, 0}, /* Set paper size. */
478 {"purgem", s_purgem
, 0},
480 {"reloc", s_reloc
, 0},
484 {"sbttl", listing_title
, 1}, /* Subtitle of listing. */
489 {"single", float_cons
, 'f'},
491 {"space", s_space
, 0},
492 {"skip", s_space
, 0},
493 {"sleb128", s_leb128
, 1},
494 {"spc", s_ignore
, 0},
495 {"stabd", s_stab
, 'd'},
496 {"stabn", s_stab
, 'n'},
497 {"stabs", s_stab
, 's'},
498 {"string", stringer
, 8+1},
499 {"string8", stringer
, 8+1},
500 {"string16", stringer
, 16+1},
501 {"string32", stringer
, 32+1},
502 {"string64", stringer
, 64+1},
503 {"struct", s_struct
, 0},
507 /* This is for gcc to use. It's only just been added (2/94), so gcc
508 won't be able to use it for a while -- probably a year or more.
509 But once this has been released, check with gcc maintainers
510 before deleting it or even changing the spelling. */
511 {"this_GCC_requires_the_GNU_assembler", s_ignore
, 0},
512 /* If we're folding case -- done for some targets, not necessarily
513 all -- the above string in an input file will be converted to
514 this one. Match it either way... */
515 {"this_gcc_requires_the_gnu_assembler", s_ignore
, 0},
517 {"title", listing_title
, 0}, /* Listing title. */
518 {"ttl", listing_title
, 0},
520 {"uleb128", s_leb128
, 0},
524 {"xdef", s_globl
, 0},
525 {"xref", s_ignore
, 0},
526 {"xstabs", s_xstab
, 's'},
527 {"warning", s_errwarn
, 0},
528 {"weakref", s_weakref
, 0},
530 {"zero", s_space
, 0},
534 {NULL
, NULL
, 0} /* End sentinel. */
538 get_absolute_expr (expressionS
*exp
)
540 expression_and_evaluate (exp
);
542 if (exp
->X_op
!= O_constant
)
544 if (exp
->X_op
!= O_absent
)
545 as_bad (_("bad or irreducible absolute expression"));
546 exp
->X_add_number
= 0;
548 return exp
->X_add_number
;
552 get_absolute_expression (void)
556 return get_absolute_expr (&exp
);
559 static int pop_override_ok
= 0;
560 static const char *pop_table_name
;
563 pop_insert (const pseudo_typeS
*table
)
565 const pseudo_typeS
*pop
;
566 for (pop
= table
; pop
->poc_name
; pop
++)
568 po_entry_t
*elt
= po_entry_alloc (pop
->poc_name
, pop
);
569 if (htab_insert (po_hash
, elt
, 0) != NULL
)
572 if (!pop_override_ok
)
573 as_fatal (_("error constructing %s pseudo-op table"),
579 #ifndef md_pop_insert
580 #define md_pop_insert() pop_insert(md_pseudo_table)
583 #ifndef obj_pop_insert
584 #define obj_pop_insert() pop_insert(obj_pseudo_table)
587 #ifndef cfi_pop_insert
588 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
594 po_hash
= htab_create_alloc (16, hash_po_entry
, eq_po_entry
, NULL
,
597 /* Do the target-specific pseudo ops. */
598 pop_table_name
= "md";
601 /* Now object specific. Skip any that were in the target table. */
602 pop_table_name
= "obj";
606 /* Now portable ones. Skip any that we've seen already. */
607 pop_table_name
= "standard";
608 pop_insert (potable
);
611 pop_table_name
= "cfi";
616 #define HANDLE_CONDITIONAL_ASSEMBLY(num_read) \
617 if (ignore_input ()) \
619 char *eol = find_end_of_line (input_line_pointer - (num_read), \
621 input_line_pointer = (input_line_pointer <= buffer_limit \
622 && eol >= buffer_limit) \
628 /* This function is used when scrubbing the characters between #APP
631 static char *scrub_string
;
632 static char *scrub_string_end
;
635 scrub_from_string (char *buf
, size_t buflen
)
639 copy
= scrub_string_end
- scrub_string
;
642 memcpy (buf
, scrub_string
, copy
);
643 scrub_string
+= copy
;
647 /* Helper function of read_a_source_file, which tries to expand a macro. */
649 try_macro (char term
, const char *line
)
655 if (check_macro (line
, &out
, &err
, ¯o
))
659 *input_line_pointer
++ = term
;
660 input_scrub_include_sb (&out
,
661 input_line_pointer
, 1);
664 input_scrub_next_buffer (&input_line_pointer
);
666 md_macro_info (macro
);
674 /* Start a new instruction bundle. Returns the rs_align_code frag that
675 will be used to align the new bundle. */
679 fragS
*frag
= frag_now
;
681 frag_align_code (0, 0);
683 while (frag
->fr_type
!= rs_align_code
)
684 frag
= frag
->fr_next
;
686 gas_assert (frag
!= frag_now
);
691 /* Calculate the maximum size after relaxation of the region starting
692 at the given frag and extending through frag_now (which is unfinished). */
694 pending_bundle_size (fragS
*frag
)
696 unsigned int offset
= frag
->fr_fix
;
697 unsigned int size
= 0;
699 gas_assert (frag
!= frag_now
);
700 gas_assert (frag
->fr_type
== rs_align_code
);
702 while (frag
!= frag_now
)
704 /* This should only happen in what will later become an error case. */
708 size
+= frag
->fr_fix
;
709 if (frag
->fr_type
== rs_machine_dependent
)
710 size
+= md_frag_max_var (frag
);
712 frag
= frag
->fr_next
;
715 gas_assert (frag
== frag_now
);
716 size
+= frag_now_fix ();
717 if (frag
->fr_type
== rs_machine_dependent
)
718 size
+= md_frag_max_var (frag
);
720 gas_assert (size
>= offset
);
722 return size
- offset
;
725 /* Finish off the frag created to ensure bundle alignment. */
727 finish_bundle (fragS
*frag
, unsigned int size
)
729 gas_assert (bundle_align_p2
> 0);
730 gas_assert (frag
->fr_type
== rs_align_code
);
734 /* If there is more than a single byte, then we need to set up the
735 alignment frag. Otherwise we leave it at its initial state from
736 calling frag_align_code (0, 0), so that it does nothing. */
737 frag
->fr_offset
= bundle_align_p2
;
738 frag
->fr_subtype
= size
- 1;
741 /* We do this every time rather than just in s_bundle_align_mode
742 so that we catch any affected section without needing hooks all
743 over for all paths that do section changes. It's cheap enough. */
744 if (bundle_align_p2
> OCTETS_PER_BYTE_POWER
)
745 record_alignment (now_seg
, bundle_align_p2
- OCTETS_PER_BYTE_POWER
);
748 /* Assemble one instruction. This takes care of the bundle features
749 around calling md_assemble. */
751 assemble_one (char *line
)
753 fragS
*insn_start_frag
= NULL
;
755 if (bundle_lock_frchain
!= NULL
&& bundle_lock_frchain
!= frchain_now
)
757 as_bad (_("cannot change section or subsection inside .bundle_lock"));
758 /* Clearing this serves as a marker that we have already complained. */
759 bundle_lock_frchain
= NULL
;
762 if (bundle_lock_frchain
== NULL
&& bundle_align_p2
> 0)
763 insn_start_frag
= start_bundle ();
767 if (bundle_lock_frchain
!= NULL
)
769 /* Make sure this hasn't pushed the locked sequence
770 past the bundle size. */
771 unsigned int bundle_size
= pending_bundle_size (bundle_lock_frag
);
772 if (bundle_size
> 1U << bundle_align_p2
)
773 as_bad (_ (".bundle_lock sequence at %u bytes, "
774 "but .bundle_align_mode limit is %u bytes"),
775 bundle_size
, 1U << bundle_align_p2
);
777 else if (bundle_align_p2
> 0)
779 unsigned int insn_size
= pending_bundle_size (insn_start_frag
);
781 if (insn_size
> 1U << bundle_align_p2
)
782 as_bad (_("single instruction is %u bytes long, "
783 "but .bundle_align_mode limit is %u bytes"),
784 insn_size
, 1U << bundle_align_p2
);
786 finish_bundle (insn_start_frag
, insn_size
);
790 #else /* !HANDLE_BUNDLE */
792 # define assemble_one(line) md_assemble(line)
794 #endif /* HANDLE_BUNDLE */
799 flagword flags
= bfd_section_flags (now_seg
);
801 return (flags
& SEC_ALLOC
) && !(flags
& (SEC_LOAD
| SEC_HAS_CONTENTS
));
804 /* Guts of .align directive:
805 N is the power of two to which to align. A value of zero is accepted but
806 ignored: the default alignment of the section will be at least this.
807 FILL may be NULL, or it may point to the bytes of the fill pattern.
808 LEN is the length of whatever FILL points to, if anything. If LEN is zero
809 but FILL is not NULL then LEN is treated as if it were one.
810 MAX is the maximum number of characters to skip when doing the alignment,
811 or 0 if there is no maximum. */
814 do_align (unsigned int n
, char *fill
, unsigned int len
, unsigned int max
)
816 if (now_seg
== absolute_section
|| in_bss ())
822 if (now_seg
== absolute_section
)
823 as_warn (_("ignoring fill value in absolute section"));
825 as_warn (_("ignoring fill value in section `%s'"),
826 segment_name (now_seg
));
833 #ifdef md_flush_pending_output
834 md_flush_pending_output ();
838 md_do_align (n
, fill
, len
, max
, just_record_alignment
);
841 /* Only make a frag if we HAVE to... */
842 if ((n
> OCTETS_PER_BYTE_POWER
) && !need_pass_2
)
846 if (subseg_text_p (now_seg
))
847 frag_align_code (n
, max
);
849 frag_align (n
, 0, max
);
852 frag_align (n
, *fill
, max
);
854 frag_align_pattern (n
, fill
, len
, max
);
858 just_record_alignment
: ATTRIBUTE_UNUSED_LABEL
861 if (n
> OCTETS_PER_BYTE_POWER
)
862 record_alignment (now_seg
, n
- OCTETS_PER_BYTE_POWER
);
865 /* We read the file, putting things into a web that represents what we
866 have been reading. */
868 read_a_source_file (const char *name
)
872 char *s
; /* String of symbol, '\0' appended. */
874 const pseudo_typeS
*pop
;
880 buffer
= input_scrub_new_file (name
);
883 listing_newline (NULL
);
884 register_dependency (name
);
886 /* Generate debugging information before we've read anything in to denote
887 this file as the "main" source file and not a subordinate one
888 (e.g. N_SO vs N_SOL in stabs). */
889 generate_file_debug ();
891 while ((buffer_limit
= input_scrub_next_buffer (&input_line_pointer
)) != 0)
892 { /* We have another line to parse. */
894 /* In order to avoid listing macro expansion lines with labels
895 multiple times, keep track of which line was last issued. */
896 static char *last_eol
;
900 while (input_line_pointer
< buffer_limit
)
903 /* We have more of this buffer to parse. */
905 /* We now have input_line_pointer->1st char of next line.
906 If input_line_pointer [-1] == '\n' then we just
907 scanned another line: so bump line counters. */
908 was_new_line
= is_end_of_line
[(unsigned char) input_line_pointer
[-1]];
911 symbol_set_value_now (&dot_symbol
);
912 #ifdef md_start_line_hook
913 md_start_line_hook ();
915 if (input_line_pointer
[-1] == '\n')
916 bump_line_counters ();
920 /* If listing is on, and we are expanding a macro, then give
921 the listing code the contents of the expanded line. */
924 if ((listing
& LISTING_MACEXP
) && macro_nest
> 0)
926 /* Find the end of the current expanded macro line. */
927 s
= find_end_of_line (input_line_pointer
, flag_m68k_mri
);
935 /* Copy it for safe keeping. Also give an indication of
936 how much macro nesting is involved at this point. */
937 len
= s
- input_line_pointer
;
938 copy
= XNEWVEC (char, len
+ macro_nest
+ 2);
939 memset (copy
, '>', macro_nest
);
940 copy
[macro_nest
] = ' ';
941 memcpy (copy
+ macro_nest
+ 1, input_line_pointer
, len
);
942 copy
[macro_nest
+ 1 + len
] = '\0';
944 /* Install the line with the listing facility. */
945 listing_newline (copy
);
949 listing_newline (NULL
);
956 if (LABELS_WITHOUT_COLONS
|| flag_m68k_mri
)
958 next_char
= * input_line_pointer
;
959 /* Text at the start of a line must be a label, we
960 run down and stick a colon in. */
961 if (is_name_beginner (next_char
) || next_char
== '"')
966 HANDLE_CONDITIONAL_ASSEMBLY (0);
968 nul_char
= get_symbol_name (& line_start
);
969 next_char
= (nul_char
== '"' ? input_line_pointer
[1] : nul_char
);
971 /* In MRI mode, the EQU and MACRO pseudoops must
972 be handled specially. */
976 char *rest
= input_line_pointer
+ 1;
980 if (*rest
== ' ' || *rest
== '\t')
982 if ((strncasecmp (rest
, "EQU", 3) == 0
983 || strncasecmp (rest
, "SET", 3) == 0)
984 && (rest
[3] == ' ' || rest
[3] == '\t'))
986 input_line_pointer
= rest
+ 3;
988 strncasecmp (rest
, "SET", 3) == 0);
991 if (strncasecmp (rest
, "MACRO", 5) == 0
994 || is_end_of_line
[(unsigned char) rest
[5]]))
998 /* In MRI mode, we need to handle the MACRO
999 pseudo-op specially: we don't want to put the
1000 symbol in the symbol table. */
1002 #ifdef TC_START_LABEL_WITHOUT_COLON
1003 && TC_START_LABEL_WITHOUT_COLON (nul_char
, next_char
)
1006 line_label
= colon (line_start
);
1008 line_label
= symbol_create (line_start
,
1010 &zero_address_frag
, 0);
1012 next_char
= restore_line_pointer (nul_char
);
1013 if (next_char
== ':')
1014 input_line_pointer
++;
1019 /* We are at the beginning of a line, or similar place.
1020 We expect a well-formed assembler statement.
1021 A "symbol-name:" is a statement.
1023 Depending on what compiler is used, the order of these tests
1024 may vary to catch most common case 1st.
1025 Each test is independent of all other tests at the (top)
1028 nul_char
= next_char
= *input_line_pointer
++;
1029 while (next_char
== '\t' || next_char
== ' ' || next_char
== '\f');
1031 /* C is the 1st significant character.
1032 Input_line_pointer points after that character. */
1033 if (is_name_beginner (next_char
) || next_char
== '"')
1037 /* Want user-defined label or pseudo/opcode. */
1038 HANDLE_CONDITIONAL_ASSEMBLY (1);
1040 --input_line_pointer
;
1041 nul_char
= get_symbol_name (& s
); /* name's delimiter. */
1042 next_char
= (nul_char
== '"' ? input_line_pointer
[1] : nul_char
);
1043 rest
= input_line_pointer
+ (nul_char
== '"' ? 2 : 1);
1045 /* NEXT_CHAR is character after symbol.
1046 The end of symbol in the input line is now '\0'.
1047 S points to the beginning of the symbol.
1048 [In case of pseudo-op, s->'.'.]
1049 Input_line_pointer->'\0' where NUL_CHAR was. */
1050 if (TC_START_LABEL (s
, nul_char
, next_char
))
1054 /* In MRI mode, \tsym: set 0 is permitted. */
1058 if (*rest
== ' ' || *rest
== '\t')
1061 if ((strncasecmp (rest
, "EQU", 3) == 0
1062 || strncasecmp (rest
, "SET", 3) == 0)
1063 && (rest
[3] == ' ' || rest
[3] == '\t'))
1065 input_line_pointer
= rest
+ 3;
1071 line_label
= colon (s
); /* User-defined label. */
1072 restore_line_pointer (nul_char
);
1073 ++ input_line_pointer
;
1074 #ifdef tc_check_label
1075 tc_check_label (line_label
);
1077 /* Input_line_pointer->after ':'. */
1080 else if ((next_char
== '=' && *rest
== '=')
1081 || ((next_char
== ' ' || next_char
== '\t')
1086 demand_empty_rest_of_line ();
1088 else if ((next_char
== '='
1089 || ((next_char
== ' ' || next_char
== '\t')
1091 #ifdef TC_EQUAL_IN_INSN
1092 && !TC_EQUAL_IN_INSN (next_char
, s
)
1097 demand_empty_rest_of_line ();
1101 /* Expect pseudo-op or machine instruction. */
1104 #ifndef TC_CASE_SENSITIVE
1108 strncpy (original_case_string
, s2
,
1109 sizeof (original_case_string
) - 1);
1110 original_case_string
[sizeof (original_case_string
) - 1] = 0;
1114 *s2
= TOLOWER (*s2
);
1119 if (NO_PSEUDO_DOT
|| flag_m68k_mri
)
1121 /* The MRI assembler uses pseudo-ops without
1123 pop
= po_entry_find (po_hash
, s
);
1124 if (pop
!= NULL
&& pop
->poc_handler
== NULL
)
1129 || (!flag_m68k_mri
&& *s
== '.'))
1133 WARNING: next_char may be end-of-line.
1134 We lookup the pseudo-op table with s+1 because we
1135 already know that the pseudo-op begins with a '.'. */
1138 pop
= po_entry_find (po_hash
, s
+ 1);
1139 if (pop
&& !pop
->poc_handler
)
1142 /* In MRI mode, we may need to insert an
1143 automatic alignment directive. What a hack
1145 if (mri_pending_align
1147 || !((pop
->poc_handler
== cons
1148 && pop
->poc_val
== 1)
1149 || (pop
->poc_handler
== s_space
1150 && pop
->poc_val
== 1)
1151 #ifdef tc_conditional_pseudoop
1152 || tc_conditional_pseudoop (pop
)
1154 || pop
->poc_handler
== s_if
1155 || pop
->poc_handler
== s_ifdef
1156 || pop
->poc_handler
== s_ifc
1157 || pop
->poc_handler
== s_ifeqs
1158 || pop
->poc_handler
== s_else
1159 || pop
->poc_handler
== s_endif
1160 || pop
->poc_handler
== s_globl
1161 || pop
->poc_handler
== s_ignore
)))
1163 do_align (1, (char *) NULL
, 0, 0);
1164 mri_pending_align
= 0;
1166 if (line_label
!= NULL
)
1168 symbol_set_frag (line_label
, frag_now
);
1169 S_SET_VALUE (line_label
, frag_now_fix ());
1173 /* Print the error msg now, while we still can. */
1176 char *end
= input_line_pointer
;
1178 (void) restore_line_pointer (nul_char
);
1180 nul_char
= next_char
= *--input_line_pointer
;
1181 *input_line_pointer
= '\0';
1182 if (! macro_defined
|| ! try_macro (next_char
, s
))
1185 as_bad (_("unknown pseudo-op: `%s'"), s
);
1186 *input_line_pointer
++ = nul_char
;
1191 /* Put it back for error messages etc. */
1192 next_char
= restore_line_pointer (nul_char
);
1193 /* The following skip of whitespace is compulsory.
1194 A well shaped space is sometimes all that separates
1195 keyword from operands. */
1196 if (next_char
== ' ' || next_char
== '\t')
1197 input_line_pointer
++;
1199 /* Input_line is restored.
1200 Input_line_pointer->1st non-blank char
1201 after pseudo-operation. */
1202 (*pop
->poc_handler
) (pop
->poc_val
);
1204 /* If that was .end, just get out now. */
1205 if (pop
->poc_handler
== s_end
)
1210 /* WARNING: next_char may be end-of-line. */
1211 /* Also: input_line_pointer->`\0` where nul_char was. */
1212 (void) restore_line_pointer (nul_char
);
1213 input_line_pointer
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 1, 0);
1214 next_char
= nul_char
= *input_line_pointer
;
1215 *input_line_pointer
= '\0';
1217 generate_lineno_debug ();
1219 if (macro_defined
&& try_macro (next_char
, s
))
1222 if (mri_pending_align
)
1224 do_align (1, (char *) NULL
, 0, 0);
1225 mri_pending_align
= 0;
1226 if (line_label
!= NULL
)
1228 symbol_set_frag (line_label
, frag_now
);
1229 S_SET_VALUE (line_label
, frag_now_fix ());
1233 assemble_one (s
); /* Assemble 1 instruction. */
1235 /* PR 19630: The backend may have set ilp to NULL
1236 if it encountered a catastrophic failure. */
1237 if (input_line_pointer
== NULL
)
1238 as_fatal (_("unable to continue with assembly."));
1240 *input_line_pointer
++ = nul_char
;
1242 /* We resume loop AFTER the end-of-line from
1243 this instruction. */
1249 /* Empty statement? */
1250 if (is_end_of_line
[(unsigned char) next_char
])
1253 if ((LOCAL_LABELS_DOLLAR
|| LOCAL_LABELS_FB
) && ISDIGIT (next_char
))
1255 /* local label ("4:") */
1256 char *backup
= input_line_pointer
;
1258 HANDLE_CONDITIONAL_ASSEMBLY (1);
1260 temp
= next_char
- '0';
1262 if (nul_char
== '"')
1263 ++ input_line_pointer
;
1265 /* Read the whole number. */
1266 while (ISDIGIT (*input_line_pointer
))
1268 const long digit
= *input_line_pointer
- '0';
1269 if (temp
> (INT_MAX
- digit
) / 10)
1271 as_bad (_("local label too large near %s"), backup
);
1275 temp
= temp
* 10 + digit
;
1276 ++input_line_pointer
;
1279 /* Overflow: stop processing the label. */
1282 ignore_rest_of_line ();
1286 if (LOCAL_LABELS_DOLLAR
1287 && *input_line_pointer
== '$'
1288 && *(input_line_pointer
+ 1) == ':')
1290 input_line_pointer
+= 2;
1292 if (dollar_label_defined (temp
))
1294 as_fatal (_("label \"%ld$\" redefined"), temp
);
1297 define_dollar_label (temp
);
1298 colon (dollar_label_name (temp
, 0));
1303 && *input_line_pointer
++ == ':')
1305 fb_label_instance_inc (temp
);
1306 colon (fb_label_name (temp
, 0));
1310 input_line_pointer
= backup
;
1313 if (next_char
&& strchr (line_comment_chars
, next_char
))
1314 { /* Its a comment. Better say APP or NO_APP. */
1319 unsigned int new_length
;
1322 s
= input_line_pointer
;
1323 if (!startswith (s
, "APP\n"))
1326 ignore_rest_of_line ();
1329 bump_line_counters ();
1332 ends
= strstr (s
, "#NO_APP\n");
1336 unsigned int tmp_len
;
1339 /* The end of the #APP wasn't in this buffer. We
1340 keep reading in buffers until we find the #NO_APP
1341 that goes with this #APP There is one. The specs
1343 tmp_len
= buffer_limit
- s
;
1344 tmp_buf
= XNEWVEC (char, tmp_len
+ 1);
1345 memcpy (tmp_buf
, s
, tmp_len
);
1348 new_tmp
= input_scrub_next_buffer (&buffer
);
1352 buffer_limit
= new_tmp
;
1353 input_line_pointer
= buffer
;
1354 ends
= strstr (buffer
, "#NO_APP\n");
1356 num
= ends
- buffer
;
1358 num
= buffer_limit
- buffer
;
1360 tmp_buf
= XRESIZEVEC (char, tmp_buf
, tmp_len
+ num
);
1361 memcpy (tmp_buf
+ tmp_len
, buffer
, num
);
1366 input_line_pointer
= ends
? ends
+ 8 : NULL
;
1374 input_line_pointer
= ends
+ 8;
1378 scrub_string_end
= ends
;
1380 new_length
= ends
- s
;
1381 new_buf
= XNEWVEC (char, new_length
);
1388 space
= (new_buf
+ new_length
) - new_tmp
;
1389 size
= do_scrub_chars (scrub_from_string
, new_tmp
, space
);
1397 new_buf
= XRESIZEVEC (char, new_buf
, new_length
+ 100);
1398 new_tmp
= new_buf
+ new_length
;
1404 /* We've "scrubbed" input to the preferred format. In the
1405 process we may have consumed the whole of the remaining
1406 file (and included files). We handle this formatted
1407 input similar to that of macro expansion, letting
1408 actual macro expansion (possibly nested) and other
1409 input expansion work. Beware that in messages, line
1410 numbers and possibly file names will be incorrect. */
1411 new_length
= strlen (new_buf
);
1412 sb_build (&sbuf
, new_length
);
1413 sb_add_buffer (&sbuf
, new_buf
, new_length
);
1414 input_scrub_include_sb (&sbuf
, input_line_pointer
, 0);
1416 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1421 HANDLE_CONDITIONAL_ASSEMBLY (1);
1423 #ifdef tc_unrecognized_line
1424 if (tc_unrecognized_line (next_char
))
1427 input_line_pointer
--;
1428 /* Report unknown char as error. */
1429 demand_empty_rest_of_line ();
1434 symbol_set_value_now (&dot_symbol
);
1436 #ifdef HANDLE_BUNDLE
1437 if (bundle_lock_frag
!= NULL
)
1439 as_bad_where (bundle_lock_frag
->fr_file
, bundle_lock_frag
->fr_line
,
1440 _(".bundle_lock with no matching .bundle_unlock"));
1441 bundle_lock_frag
= NULL
;
1442 bundle_lock_frchain
= NULL
;
1443 bundle_lock_depth
= 0;
1450 /* Close the input file. */
1451 input_scrub_close ();
1452 #ifdef WARN_COMMENTS
1454 if (warn_comment
&& found_comment
)
1455 as_warn_where (found_comment_file
, found_comment
,
1456 "first comment found here");
1461 /* Convert O_constant expression EXP into the equivalent O_big representation.
1462 Take the sign of the number from SIGN rather than X_add_number. */
1465 convert_to_bignum (expressionS
*exp
, int sign
)
1470 value
= exp
->X_add_number
;
1471 for (i
= 0; i
< sizeof (exp
->X_add_number
) / CHARS_PER_LITTLENUM
; i
++)
1473 generic_bignum
[i
] = value
& LITTLENUM_MASK
;
1474 value
>>= LITTLENUM_NUMBER_OF_BITS
;
1476 /* Add a sequence of sign bits if the top bit of X_add_number is not
1477 the sign of the original value. */
1478 if ((exp
->X_add_number
< 0) == !sign
)
1479 generic_bignum
[i
++] = sign
? LITTLENUM_MASK
: 0;
1481 exp
->X_add_number
= i
;
1484 /* For most MRI pseudo-ops, the line actually ends at the first
1485 nonquoted space. This function looks for that point, stuffs a null
1486 in, and sets *STOPCP to the character that used to be there, and
1487 returns the location.
1489 Until I hear otherwise, I am going to assume that this is only true
1490 for the m68k MRI assembler. */
1493 mri_comment_field (char *stopcp
)
1499 know (flag_m68k_mri
);
1501 for (s
= input_line_pointer
;
1502 ((!is_end_of_line
[(unsigned char) *s
] && *s
!= ' ' && *s
!= '\t')
1510 for (s
= input_line_pointer
;
1511 !is_end_of_line
[(unsigned char) *s
];
1521 /* Skip to the end of an MRI comment field. */
1524 mri_comment_end (char *stop
, int stopc
)
1528 input_line_pointer
= stop
;
1530 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1531 ++input_line_pointer
;
1535 s_abort (int ignore ATTRIBUTE_UNUSED
)
1537 as_fatal (_(".abort detected. Abandoning ship."));
1540 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1541 (in bytes). A negative ARG is the negative of the length of the
1542 fill pattern. BYTES_P is non-zero if the alignment value should be
1543 interpreted as the byte boundary, rather than the power of 2. */
1544 #ifndef TC_ALIGN_LIMIT
1545 #define TC_ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1549 s_align (signed int arg
, int bytes_p
)
1551 unsigned int align_limit
= TC_ALIGN_LIMIT
;
1560 stop
= mri_comment_field (&stopc
);
1562 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1567 align
= arg
; /* Default value from pseudo-op table. */
1571 align
= get_absolute_expression ();
1574 #ifdef TC_ALIGN_ZERO_IS_DEFAULT
1575 if (arg
> 0 && align
== 0)
1582 /* Convert to a power of 2. */
1587 for (i
= 0; (align
& 1) == 0; align
>>= 1, ++i
)
1590 as_bad (_("alignment not a power of 2"));
1596 if (align
> align_limit
)
1598 align
= align_limit
;
1599 as_warn (_("alignment too large: %u assumed"), align_limit
);
1602 if (*input_line_pointer
!= ',')
1609 ++input_line_pointer
;
1610 if (*input_line_pointer
== ',')
1614 fill
= get_absolute_expression ();
1619 if (*input_line_pointer
!= ',')
1623 ++input_line_pointer
;
1624 max
= get_absolute_expression ();
1631 as_warn (_("expected fill pattern missing"));
1632 do_align (align
, (char *) NULL
, 0, max
);
1636 unsigned int fill_len
;
1648 do_align (align
, &fill_char
, fill_len
, max
);
1654 if ((size_t) fill_len
> sizeof ab
)
1656 as_warn (_("fill pattern too long, truncating to %u"),
1657 (unsigned) sizeof ab
);
1658 fill_len
= sizeof ab
;
1661 md_number_to_chars (ab
, fill
, fill_len
);
1662 do_align (align
, ab
, fill_len
, max
);
1666 demand_empty_rest_of_line ();
1669 mri_comment_end (stop
, stopc
);
1672 /* Handle the .align pseudo-op on machines where ".align 4" means
1673 align to a 4 byte boundary. */
1676 s_align_bytes (int arg
)
1681 /* Handle the .align pseudo-op on machines where ".align 4" means align
1682 to a 2**4 boundary. */
1685 s_align_ptwo (int arg
)
1690 /* Switch in and out of alternate macro mode. */
1695 demand_empty_rest_of_line ();
1696 macro_set_alternate (on
);
1699 /* Read a symbol name from input_line_pointer.
1701 Stores the symbol name in a buffer and returns a pointer to this buffer.
1702 The buffer is xalloc'ed. It is the caller's responsibility to free
1705 The name is not left in the i_l_p buffer as it may need processing
1706 to handle escape characters.
1708 Advances i_l_p to the next non-whitespace character.
1710 If a symbol name could not be read, the routine issues an error
1711 messages, skips to the end of the line and returns NULL. */
1714 read_symbol_name (void)
1720 c
= *input_line_pointer
++;
1724 #define SYM_NAME_CHUNK_LEN 128
1725 ptrdiff_t len
= SYM_NAME_CHUNK_LEN
;
1729 start
= name
= XNEWVEC (char, len
+ 1);
1731 name_end
= name
+ SYM_NAME_CHUNK_LEN
;
1733 while (is_a_char (C
= next_char_of_string ()))
1735 if (name
>= name_end
)
1739 sofar
= name
- start
;
1740 len
+= SYM_NAME_CHUNK_LEN
;
1741 start
= XRESIZEVEC (char, start
, len
+ 1);
1742 name_end
= start
+ len
;
1743 name
= start
+ sofar
;
1750 /* Since quoted symbol names can contain non-ASCII characters,
1751 check the string and warn if it cannot be recognised by the
1752 current character set. */
1753 if (mbstowcs (NULL
, name
, len
) == (size_t) -1)
1754 as_warn (_("symbol name not recognised in the current locale"));
1756 else if (is_name_beginner (c
) || (input_from_string
&& c
== FAKE_LABEL_CHAR
))
1760 name
= input_line_pointer
- 1;
1762 /* We accept FAKE_LABEL_CHAR in a name in case this is
1763 being called with a constructed string. */
1764 while (is_part_of_name (c
= *input_line_pointer
++)
1765 || (input_from_string
&& c
== FAKE_LABEL_CHAR
))
1768 len
= (input_line_pointer
- name
) - 1;
1769 start
= XNEWVEC (char, len
+ 1);
1771 memcpy (start
, name
, len
);
1774 /* Skip a name ender char if one is present. */
1775 if (! is_name_ender (c
))
1776 --input_line_pointer
;
1779 name
= start
= NULL
;
1783 as_bad (_("expected symbol name"));
1784 ignore_rest_of_line ();
1795 s_comm_internal (int param
,
1796 symbolS
*(*comm_parse_extra
) (int, symbolS
*, addressT
))
1800 symbolS
*symbolP
= NULL
;
1806 stop
= mri_comment_field (&stopc
);
1808 if ((name
= read_symbol_name ()) == NULL
)
1811 /* Accept an optional comma after the name. The comma used to be
1812 required, but Irix 5 cc does not generate it for .lcomm. */
1813 if (*input_line_pointer
== ',')
1814 input_line_pointer
++;
1816 temp
= get_absolute_expr (&exp
);
1818 size
&= ((addressT
) 2 << (stdoutput
->arch_info
->bits_per_address
- 1)) - 1;
1819 if (exp
.X_op
== O_absent
)
1821 as_bad (_("missing size expression"));
1822 ignore_rest_of_line ();
1825 else if (temp
!= size
|| !exp
.X_unsigned
)
1827 as_warn (_("size (%ld) out of range, ignored"), (long) temp
);
1828 ignore_rest_of_line ();
1832 symbolP
= symbol_find_or_make (name
);
1833 if ((S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
1834 && !S_IS_COMMON (symbolP
))
1836 if (!S_IS_VOLATILE (symbolP
))
1839 as_bad (_("symbol `%s' is already defined"), name
);
1840 ignore_rest_of_line ();
1843 symbolP
= symbol_clone (symbolP
, 1);
1844 S_SET_SEGMENT (symbolP
, undefined_section
);
1845 S_SET_VALUE (symbolP
, 0);
1846 symbol_set_frag (symbolP
, &zero_address_frag
);
1847 S_CLEAR_VOLATILE (symbolP
);
1850 size
= S_GET_VALUE (symbolP
);
1853 else if (size
!= temp
)
1854 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1855 name
, (long) size
, (long) temp
);
1857 if (comm_parse_extra
!= NULL
)
1858 symbolP
= (*comm_parse_extra
) (param
, symbolP
, size
);
1861 S_SET_VALUE (symbolP
, (valueT
) size
);
1862 S_SET_EXTERNAL (symbolP
);
1863 S_SET_SEGMENT (symbolP
, bfd_com_section_ptr
);
1866 demand_empty_rest_of_line ();
1869 mri_comment_end (stop
, stopc
);
1877 s_comm_internal (ignore
, NULL
);
1880 /* The MRI COMMON pseudo-op. We handle this by creating a common
1881 symbol with the appropriate name. We make s_space do the right
1882 thing by increasing the size. */
1885 s_mri_common (int small ATTRIBUTE_UNUSED
)
1901 stop
= mri_comment_field (&stopc
);
1905 name
= input_line_pointer
;
1906 if (!ISDIGIT (*name
))
1907 c
= get_symbol_name (& name
);
1912 ++input_line_pointer
;
1914 while (ISDIGIT (*input_line_pointer
));
1916 c
= *input_line_pointer
;
1917 *input_line_pointer
= '\0';
1919 if (line_label
!= NULL
)
1921 alc
= XNEWVEC (char, strlen (S_GET_NAME (line_label
))
1922 + (input_line_pointer
- name
) + 1);
1923 sprintf (alc
, "%s%s", name
, S_GET_NAME (line_label
));
1928 sym
= symbol_find_or_make (name
);
1929 c
= restore_line_pointer (c
);
1932 if (*input_line_pointer
!= ',')
1936 ++input_line_pointer
;
1937 align
= get_absolute_expression ();
1940 if (S_IS_DEFINED (sym
) && !S_IS_COMMON (sym
))
1942 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym
));
1943 ignore_rest_of_line ();
1944 mri_comment_end (stop
, stopc
);
1948 S_SET_EXTERNAL (sym
);
1949 S_SET_SEGMENT (sym
, bfd_com_section_ptr
);
1950 mri_common_symbol
= sym
;
1954 S_SET_ALIGN (sym
, align
);
1959 if (line_label
!= NULL
)
1962 exp
.X_op
= O_symbol
;
1963 exp
.X_add_symbol
= sym
;
1964 exp
.X_add_number
= 0;
1965 symbol_set_value_expression (line_label
, &exp
);
1966 symbol_set_frag (line_label
, &zero_address_frag
);
1967 S_SET_SEGMENT (line_label
, expr_section
);
1970 /* FIXME: We just ignore the small argument, which distinguishes
1971 COMMON and COMMON.S. I don't know what we can do about it. */
1973 /* Ignore the type and hptype. */
1974 if (*input_line_pointer
== ',')
1975 input_line_pointer
+= 2;
1976 if (*input_line_pointer
== ',')
1977 input_line_pointer
+= 2;
1979 demand_empty_rest_of_line ();
1981 mri_comment_end (stop
, stopc
);
1985 s_data (int ignore ATTRIBUTE_UNUSED
)
1990 temp
= get_absolute_expression ();
1991 if (flag_readonly_data_in_text
)
1993 section
= text_section
;
1997 section
= data_section
;
1999 subseg_set (section
, (subsegT
) temp
);
2001 demand_empty_rest_of_line ();
2004 /* Handle the .appfile pseudo-op. This is automatically generated by
2005 do_scrub_chars when a preprocessor # line comment is seen with a
2006 file name. This default definition may be overridden by the object
2007 or CPU specific pseudo-ops. This function is also the default
2008 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
2012 s_app_file_string (char *file
, int appfile ATTRIBUTE_UNUSED
)
2016 listing_source_file (file
);
2018 register_dependency (file
);
2020 obj_app_file (file
, appfile
);
2025 s_app_file (int appfile
)
2030 /* Some assemblers tolerate immediately following '"'. */
2031 if ((s
= demand_copy_string (&length
)) != 0)
2034 = (!new_logical_line_flags (s
, -1, 1) && appfile
);
2036 /* In MRI mode, the preprocessor may have inserted an extraneous
2039 && *input_line_pointer
== '\''
2040 && is_end_of_line
[(unsigned char) input_line_pointer
[1]])
2041 ++input_line_pointer
;
2043 demand_empty_rest_of_line ();
2045 s_app_file_string (s
, appfile
);
2050 get_linefile_number (int *flag
)
2054 if (*input_line_pointer
< '0' || *input_line_pointer
> '9')
2057 *flag
= get_absolute_expression ();
2062 /* Handle the .appline pseudo-op. This is automatically generated by
2063 do_scrub_chars when a preprocessor # line comment is seen. This
2064 default definition may be overridden by the object or CPU specific
2068 s_app_line (int appline
)
2073 /* The given number is that of the next line. */
2075 linenum
= get_absolute_expression ();
2076 else if (!get_linefile_number (&linenum
))
2078 ignore_rest_of_line ();
2083 /* Some of the back ends can't deal with non-positive line numbers.
2084 Besides, it's silly. GCC however will generate a line number of
2085 zero when it is pre-processing builtins for assembler-with-cpp files:
2089 We do not want to barf on this, especially since such files are used
2090 in the GCC and GDB testsuites. So we check for negative line numbers
2091 rather than non-positive line numbers. */
2092 as_warn (_("line numbers must be positive; line number %d rejected"),
2103 if (*input_line_pointer
== '"')
2104 file
= demand_copy_string (&length
);
2110 while (get_linefile_number (&this_flag
))
2113 /* From GCC's cpp documentation:
2114 1: start of a new file.
2115 2: returning to a file after having included
2117 3: following text comes from a system header file.
2118 4: following text should be treated as extern "C".
2120 4 is nonsensical for the assembler; 3, we don't
2121 care about, so we ignore it just in case a
2122 system header file is included while
2123 preprocessing assembly. So 1 and 2 are all we
2124 care about, and they are mutually incompatible.
2125 new_logical_line_flags() demands this. */
2128 if (flags
&& flags
!= (1 << this_flag
))
2129 as_warn (_("incompatible flag %i in line directive"),
2132 flags
|= 1 << this_flag
;
2137 /* We ignore these. */
2141 as_warn (_("unsupported flag %i in line directive"),
2146 if (!is_end_of_line
[(unsigned char)*input_line_pointer
])
2151 if (appline
|| file
)
2154 new_logical_line_flags (file
, linenum
, flags
);
2157 listing_source_line (linenum
);
2161 if (appline
|| file
)
2162 demand_empty_rest_of_line ();
2164 ignore_rest_of_line ();
2167 /* Handle the .end pseudo-op. Actually, the real work is done in
2168 read_a_source_file. */
2171 s_end (int ignore ATTRIBUTE_UNUSED
)
2175 /* The MRI assembler permits the start symbol to follow .end,
2176 but we don't support that. */
2178 if (!is_end_of_line
[(unsigned char) *input_line_pointer
]
2179 && *input_line_pointer
!= '*'
2180 && *input_line_pointer
!= '!')
2181 as_warn (_("start address not supported"));
2185 /* Handle the .err pseudo-op. */
2188 s_err (int ignore ATTRIBUTE_UNUSED
)
2190 as_bad (_(".err encountered"));
2191 demand_empty_rest_of_line ();
2194 /* Handle the .error and .warning pseudo-ops. */
2200 /* The purpose for the conditional assignment is not to
2201 internationalize the directive itself, but that we need a
2202 self-contained message, one that can be passed like the
2203 demand_copy_C_string return value, and with no assumption on the
2204 location of the name of the directive within the message. */
2206 = (err
? _(".error directive invoked in source file")
2207 : _(".warning directive invoked in source file"));
2209 if (!is_it_end_of_statement ())
2211 if (*input_line_pointer
!= '\"')
2213 as_bad (_("%s argument must be a string"),
2214 err
? ".error" : ".warning");
2215 ignore_rest_of_line ();
2219 msg
= demand_copy_C_string (&len
);
2227 as_warn ("%s", msg
);
2228 demand_empty_rest_of_line ();
2231 /* Handle the MRI fail pseudo-op. */
2234 s_fail (int ignore ATTRIBUTE_UNUSED
)
2241 stop
= mri_comment_field (&stopc
);
2243 temp
= get_absolute_expression ();
2245 as_warn (_(".fail %ld encountered"), (long) temp
);
2247 as_bad (_(".fail %ld encountered"), (long) temp
);
2249 demand_empty_rest_of_line ();
2252 mri_comment_end (stop
, stopc
);
2256 s_fill (int ignore ATTRIBUTE_UNUSED
)
2258 expressionS rep_exp
;
2263 #ifdef md_flush_pending_output
2264 md_flush_pending_output ();
2267 #ifdef md_cons_align
2271 expression (&rep_exp
);
2272 if (*input_line_pointer
== ',')
2274 input_line_pointer
++;
2275 size
= get_absolute_expression ();
2276 if (*input_line_pointer
== ',')
2278 input_line_pointer
++;
2279 fill
= get_absolute_expression ();
2283 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
2284 #define BSD_FILL_SIZE_CROCK_8 (8)
2285 if (size
> BSD_FILL_SIZE_CROCK_8
)
2287 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8
);
2288 size
= BSD_FILL_SIZE_CROCK_8
;
2292 as_warn (_("size negative; .fill ignored"));
2295 else if (rep_exp
.X_op
== O_constant
&& rep_exp
.X_add_number
<= 0)
2297 if (rep_exp
.X_add_number
< 0)
2298 as_warn (_("repeat < 0; .fill ignored"));
2302 if (size
&& !need_pass_2
)
2304 if (now_seg
== absolute_section
)
2306 if (rep_exp
.X_op
!= O_constant
)
2307 as_bad (_("non-constant fill count for absolute section"));
2308 else if (fill
&& rep_exp
.X_add_number
!= 0)
2309 as_bad (_("attempt to fill absolute section with non-zero value"));
2310 abs_section_offset
+= rep_exp
.X_add_number
* size
;
2313 && (rep_exp
.X_op
!= O_constant
|| rep_exp
.X_add_number
!= 0)
2315 as_bad (_("attempt to fill section `%s' with non-zero value"),
2316 segment_name (now_seg
));
2318 if (rep_exp
.X_op
== O_constant
)
2320 p
= frag_var (rs_fill
, (int) size
, (int) size
,
2321 (relax_substateT
) 0, (symbolS
*) 0,
2322 (offsetT
) rep_exp
.X_add_number
,
2327 /* We don't have a constant repeat count, so we can't use
2328 rs_fill. We can get the same results out of rs_space,
2329 but its argument is in bytes, so we must multiply the
2330 repeat count by size. */
2333 rep_sym
= make_expr_symbol (&rep_exp
);
2336 expressionS size_exp
;
2337 size_exp
.X_op
= O_constant
;
2338 size_exp
.X_add_number
= size
;
2340 rep_exp
.X_op
= O_multiply
;
2341 rep_exp
.X_add_symbol
= rep_sym
;
2342 rep_exp
.X_op_symbol
= make_expr_symbol (&size_exp
);
2343 rep_exp
.X_add_number
= 0;
2344 rep_sym
= make_expr_symbol (&rep_exp
);
2347 p
= frag_var (rs_space
, (int) size
, (int) size
,
2348 (relax_substateT
) 0, rep_sym
, (offsetT
) 0, (char *) 0);
2351 memset (p
, 0, (unsigned int) size
);
2353 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
2354 flavoured AS. The following bizarre behaviour is to be
2355 compatible with above. I guess they tried to take up to 8
2356 bytes from a 4-byte expression and they forgot to sign
2358 #define BSD_FILL_SIZE_CROCK_4 (4)
2359 md_number_to_chars (p
, (valueT
) fill
,
2360 (size
> BSD_FILL_SIZE_CROCK_4
2361 ? BSD_FILL_SIZE_CROCK_4
2363 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
2364 but emits no error message because it seems a legal thing to do.
2365 It is a degenerate case of .fill but could be emitted by a
2368 demand_empty_rest_of_line ();
2372 s_globl (int ignore ATTRIBUTE_UNUSED
)
2381 stop
= mri_comment_field (&stopc
);
2385 if ((name
= read_symbol_name ()) == NULL
)
2388 symbolP
= symbol_find_or_make (name
);
2389 S_SET_EXTERNAL (symbolP
);
2392 c
= *input_line_pointer
;
2395 input_line_pointer
++;
2397 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
2405 demand_empty_rest_of_line ();
2408 mri_comment_end (stop
, stopc
);
2411 /* Handle the MRI IRP and IRPC pseudo-ops. */
2423 file
= as_where (&line
);
2425 eol
= find_end_of_line (input_line_pointer
, 0);
2426 sb_build (&s
, eol
- input_line_pointer
);
2427 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2428 input_line_pointer
= eol
;
2432 err
= expand_irp (irpc
, 0, &s
, &out
, get_non_macro_line_sb
);
2434 as_bad_where (file
, line
, "%s", err
);
2438 input_scrub_include_sb (&out
, input_line_pointer
, 1);
2440 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2443 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2444 the section to only be linked once. However, this is not supported
2445 by most object file formats. This takes an optional argument,
2446 which is what to do about duplicates. */
2449 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
2451 enum linkonce_type type
;
2455 type
= LINKONCE_DISCARD
;
2457 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
2462 c
= get_symbol_name (& s
);
2463 if (strcasecmp (s
, "discard") == 0)
2464 type
= LINKONCE_DISCARD
;
2465 else if (strcasecmp (s
, "one_only") == 0)
2466 type
= LINKONCE_ONE_ONLY
;
2467 else if (strcasecmp (s
, "same_size") == 0)
2468 type
= LINKONCE_SAME_SIZE
;
2469 else if (strcasecmp (s
, "same_contents") == 0)
2470 type
= LINKONCE_SAME_CONTENTS
;
2472 as_warn (_("unrecognized .linkonce type `%s'"), s
);
2474 (void) restore_line_pointer (c
);
2477 #ifdef obj_handle_link_once
2478 obj_handle_link_once (type
);
2479 #else /* ! defined (obj_handle_link_once) */
2483 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
2484 as_warn (_(".linkonce is not supported for this object file format"));
2486 flags
= bfd_section_flags (now_seg
);
2487 flags
|= SEC_LINK_ONCE
;
2492 case LINKONCE_DISCARD
:
2493 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
2495 case LINKONCE_ONE_ONLY
:
2496 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
2498 case LINKONCE_SAME_SIZE
:
2499 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
2501 case LINKONCE_SAME_CONTENTS
:
2502 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
2505 if (!bfd_set_section_flags (now_seg
, flags
))
2506 as_bad (_("bfd_set_section_flags: %s"),
2507 bfd_errmsg (bfd_get_error ()));
2509 #endif /* ! defined (obj_handle_link_once) */
2511 demand_empty_rest_of_line ();
2515 bss_alloc (symbolS
*symbolP
, addressT size
, unsigned int align
)
2518 segT current_seg
= now_seg
;
2519 subsegT current_subseg
= now_subseg
;
2520 segT bss_seg
= bss_section
;
2522 #if defined (TC_MIPS) || defined (TC_ALPHA)
2523 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
2524 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
2526 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2527 if (size
<= bfd_get_gp_size (stdoutput
))
2529 bss_seg
= subseg_new (".sbss", 1);
2530 seg_info (bss_seg
)->bss
= 1;
2531 if (!bfd_set_section_flags (bss_seg
, SEC_ALLOC
| SEC_SMALL_DATA
))
2532 as_warn (_("error setting flags for \".sbss\": %s"),
2533 bfd_errmsg (bfd_get_error ()));
2537 subseg_set (bss_seg
, 1);
2539 if (align
> OCTETS_PER_BYTE_POWER
)
2541 record_alignment (bss_seg
, align
);
2542 frag_align (align
, 0, 0);
2545 /* Detach from old frag. */
2546 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2547 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2549 symbol_set_frag (symbolP
, frag_now
);
2550 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
* OCTETS_PER_BYTE
, NULL
);
2554 S_SET_SIZE (symbolP
, size
);
2556 S_SET_SEGMENT (symbolP
, bss_seg
);
2559 /* The symbol may already have been created with a preceding
2560 ".globl" directive -- be careful not to step on storage class
2561 in that case. Otherwise, set it to static. */
2562 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2563 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2564 #endif /* OBJ_COFF */
2566 subseg_set (current_seg
, current_subseg
);
2570 parse_align (int align_bytes
)
2576 if (*input_line_pointer
!= ',')
2579 as_bad (_("expected alignment after size"));
2580 ignore_rest_of_line ();
2584 input_line_pointer
++;
2587 align
= get_absolute_expr (&exp
);
2588 if (exp
.X_op
== O_absent
)
2591 if (!exp
.X_unsigned
)
2593 as_warn (_("alignment negative; 0 assumed"));
2597 if (align_bytes
&& align
!= 0)
2599 /* convert to a power of 2 alignment */
2600 unsigned int alignp2
= 0;
2601 while ((align
& 1) == 0)
2602 align
>>= 1, ++alignp2
;
2605 as_bad (_("alignment not a power of 2"));
2606 ignore_rest_of_line ();
2614 /* Called from s_comm_internal after symbol name and size have been
2615 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2616 1 if this was a ".bss" directive which has a 3rd argument
2617 (alignment as a power of 2), or 2 if this was a ".bss" directive
2618 with alignment in bytes. */
2621 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2627 align
= parse_align (needs_align
- 1);
2628 if (align
== (addressT
) -1)
2632 /* Assume some objects may require alignment on some systems. */
2633 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2635 bss_alloc (symbolP
, size
, align
);
2640 s_lcomm (int needs_align
)
2642 s_comm_internal (needs_align
, s_lcomm_internal
);
2646 s_lcomm_bytes (int needs_align
)
2648 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2652 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2658 /* We permit ANY defined expression: BSD4.2 demands constants. */
2659 if ((name
= read_symbol_name ()) == NULL
)
2662 if (*input_line_pointer
!= ',')
2664 as_bad (_("expected comma after \"%s\""), name
);
2668 input_line_pointer
++;
2669 expression_and_evaluate (&exp
);
2671 if (exp
.X_op
!= O_constant
2672 && exp
.X_op
!= O_register
)
2674 as_bad (_("bad expression"));
2678 symbolP
= symbol_find_or_make (name
);
2680 if (S_GET_SEGMENT (symbolP
) == undefined_section
)
2682 /* The name might be an undefined .global symbol; be sure to
2683 keep the "external" bit. */
2684 S_SET_SEGMENT (symbolP
,
2685 (exp
.X_op
== O_constant
2688 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2692 as_bad (_("symbol `%s' is already defined"), name
);
2695 demand_empty_rest_of_line ();
2700 ignore_rest_of_line ();
2705 /* Read a line into an sb. Returns the character that ended the line
2706 or zero if there are no more lines. */
2709 get_line_sb (sb
*line
, int in_macro
)
2713 if (input_line_pointer
[-1] == '\n')
2714 bump_line_counters ();
2716 if (input_line_pointer
>= buffer_limit
)
2718 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2719 if (buffer_limit
== 0)
2723 eol
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 0, in_macro
);
2724 sb_add_buffer (line
, input_line_pointer
, eol
- input_line_pointer
);
2725 input_line_pointer
= eol
;
2727 /* Don't skip multiple end-of-line characters, because that breaks support
2728 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2729 characters but isn't. Instead just skip one end of line character and
2730 return the character skipped so that the caller can re-insert it if
2732 return *input_line_pointer
++;
2736 get_non_macro_line_sb (sb
*line
)
2738 return get_line_sb (line
, 0);
2742 get_macro_line_sb (sb
*line
)
2744 return get_line_sb (line
, 1);
2747 /* Define a macro. This is an interface to macro.c. */
2750 s_macro (int ignore ATTRIBUTE_UNUSED
)
2759 file
= as_where (&line
);
2761 eol
= find_end_of_line (input_line_pointer
, 0);
2762 sb_build (&s
, eol
- input_line_pointer
);
2763 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2764 input_line_pointer
= eol
;
2766 if (line_label
!= NULL
)
2771 name
= S_GET_NAME (line_label
);
2772 len
= strlen (name
);
2773 sb_build (&label
, len
);
2774 sb_add_buffer (&label
, name
, len
);
2775 err
= define_macro (0, &s
, &label
, get_macro_line_sb
, file
, line
, &name
);
2779 err
= define_macro (0, &s
, NULL
, get_macro_line_sb
, file
, line
, &name
);
2781 as_bad_where (file
, line
, err
, name
);
2784 if (line_label
!= NULL
)
2786 S_SET_SEGMENT (line_label
, absolute_section
);
2787 S_SET_VALUE (line_label
, 0);
2788 symbol_set_frag (line_label
, &zero_address_frag
);
2791 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2792 && po_entry_find (po_hash
, name
) != NULL
)
2795 && po_entry_find (po_hash
, name
+ 1) != NULL
))
2796 as_warn_where (file
,
2798 _("attempt to redefine pseudo-op `%s' ignored"),
2805 /* Handle the .mexit pseudo-op, which immediately exits a macro
2809 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2813 cond_exit_macro (macro_nest
);
2814 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2817 as_warn (_("ignoring macro exit outside a macro definition."));
2820 /* Switch in and out of MRI mode. */
2823 s_mri (int ignore ATTRIBUTE_UNUSED
)
2826 #ifdef MRI_MODE_CHANGE
2830 on
= get_absolute_expression ();
2831 #ifdef MRI_MODE_CHANGE
2832 old_flag
= flag_mri
;
2851 /* Operator precedence changes in m68k MRI mode, so we need to
2852 update the operator rankings. */
2853 expr_set_precedence ();
2855 #ifdef MRI_MODE_CHANGE
2857 MRI_MODE_CHANGE (on
);
2860 demand_empty_rest_of_line ();
2863 /* Handle changing the location counter. */
2866 do_org (segT segment
, expressionS
*exp
, int fill
)
2868 if (segment
!= now_seg
2869 && segment
!= absolute_section
2870 && segment
!= expr_section
)
2871 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2873 if (now_seg
== absolute_section
)
2876 as_warn (_("ignoring fill value in absolute section"));
2877 if (exp
->X_op
!= O_constant
)
2879 as_bad (_("only constant offsets supported in absolute section"));
2880 exp
->X_add_number
= 0;
2882 abs_section_offset
= exp
->X_add_number
;
2887 symbolS
*sym
= exp
->X_add_symbol
;
2888 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2890 if (fill
&& in_bss ())
2891 as_warn (_("ignoring fill value in section `%s'"),
2892 segment_name (now_seg
));
2894 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2896 /* Handle complex expressions. */
2897 sym
= make_expr_symbol (exp
);
2901 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2907 s_org (int ignore ATTRIBUTE_UNUSED
)
2913 #ifdef md_flush_pending_output
2914 md_flush_pending_output ();
2917 /* The m68k MRI assembler has a different meaning for .org. It
2918 means to create an absolute section at a given address. We can't
2919 support that--use a linker script instead. */
2922 as_bad (_("MRI style ORG pseudo-op not supported"));
2923 ignore_rest_of_line ();
2927 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2928 thing as a sub-segment-relative origin. Any absolute origin is
2929 given a warning, then assumed to be segment-relative. Any
2930 segmented origin expression ("foo+42") had better be in the right
2931 segment or the .org is ignored.
2933 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2934 we never know sub-segment sizes when we are reading code. BSD
2935 will crash trying to emit negative numbers of filler bytes in
2936 certain .orgs. We don't crash, but see as-write for that code.
2938 Don't make frag if need_pass_2==1. */
2939 segment
= get_known_segmented_expression (&exp
);
2940 if (*input_line_pointer
== ',')
2942 input_line_pointer
++;
2943 temp_fill
= get_absolute_expression ();
2949 do_org (segment
, &exp
, temp_fill
);
2951 demand_empty_rest_of_line ();
2954 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2955 called by the obj-format routine which handles section changing
2956 when in MRI mode. It will create a new section, and return it. It
2957 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2958 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2961 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2971 name
= input_line_pointer
;
2972 if (!ISDIGIT (*name
))
2973 c
= get_symbol_name (& name
);
2978 ++input_line_pointer
;
2980 while (ISDIGIT (*input_line_pointer
));
2982 c
= *input_line_pointer
;
2983 *input_line_pointer
= '\0';
2986 name
= xstrdup (name
);
2988 c
= restore_line_pointer (c
);
2990 seg
= subseg_new (name
, 0);
2996 ++input_line_pointer
;
2997 align
= get_absolute_expression ();
2998 record_alignment (seg
, align
);
3002 if (*input_line_pointer
== ',')
3004 c
= *++input_line_pointer
;
3006 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
3009 as_bad (_("unrecognized section type"));
3010 ++input_line_pointer
;
3015 flags
= SEC_NO_FLAGS
;
3017 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
3018 else if (*type
== 'D' || *type
== 'M')
3019 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
3020 else if (*type
== 'R')
3021 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
3022 if (flags
!= SEC_NO_FLAGS
)
3024 if (!bfd_set_section_flags (seg
, flags
))
3025 as_warn (_("error setting flags for \"%s\": %s"),
3026 bfd_section_name (seg
),
3027 bfd_errmsg (bfd_get_error ()));
3032 /* Ignore the HP type. */
3033 if (*input_line_pointer
== ',')
3034 input_line_pointer
+= 2;
3036 demand_empty_rest_of_line ();
3038 #else /* ! TC_M68K */
3039 /* The MRI assembler seems to use different forms of .sect for
3040 different targets. */
3041 as_bad ("MRI mode not supported for this target");
3042 ignore_rest_of_line ();
3043 #endif /* ! TC_M68K */
3046 /* Handle the .print pseudo-op. */
3049 s_print (int ignore ATTRIBUTE_UNUSED
)
3054 s
= demand_copy_C_string (&len
);
3057 demand_empty_rest_of_line ();
3060 /* Handle the .purgem pseudo-op. */
3063 s_purgem (int ignore ATTRIBUTE_UNUSED
)
3065 if (is_it_end_of_statement ())
3067 demand_empty_rest_of_line ();
3077 c
= get_symbol_name (& name
);
3078 delete_macro (name
);
3079 *input_line_pointer
= c
;
3080 SKIP_WHITESPACE_AFTER_NAME ();
3082 while (*input_line_pointer
++ == ',');
3084 --input_line_pointer
;
3085 demand_empty_rest_of_line ();
3088 /* Handle the .endm/.endr pseudo-ops. */
3091 s_bad_end (int endr
)
3093 as_warn (_(".end%c encountered without preceding %s"),
3095 endr
? ".rept, .irp, or .irpc" : ".macro");
3096 demand_empty_rest_of_line ();
3099 /* Handle the .rept pseudo-op. */
3102 s_rept (int ignore ATTRIBUTE_UNUSED
)
3106 count
= (size_t) get_absolute_expression ();
3108 do_repeat (count
, "REPT", "ENDR");
3111 /* This function provides a generic repeat block implementation. It allows
3112 different directives to be used as the start/end keys. */
3115 do_repeat (size_t count
, const char *start
, const char *end
)
3120 if (((ssize_t
) count
) < 0)
3122 as_bad (_("negative count for %s - ignored"), start
);
3127 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
3129 as_bad (_("%s without %s"), start
, end
);
3133 sb_build (&many
, count
* one
.len
);
3135 sb_add_sb (&many
, &one
);
3139 input_scrub_include_sb (&many
, input_line_pointer
, 1);
3141 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3144 /* Like do_repeat except that any text matching EXPANDER in the
3145 block is replaced by the iteration count. */
3148 do_repeat_with_expander (size_t count
,
3151 const char * expander
)
3156 if (((ssize_t
) count
) < 0)
3158 as_bad (_("negative count for %s - ignored"), start
);
3163 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
3165 as_bad (_("%s without %s"), start
, end
);
3171 if (expander
!= NULL
&& strstr (one
.ptr
, expander
) != NULL
)
3173 while (count
-- > 0)
3179 sb_build (& processed
, one
.len
);
3180 sb_add_sb (& processed
, & one
);
3181 sub
= strstr (processed
.ptr
, expander
);
3182 len
= sprintf (sub
, "%lu", (unsigned long) count
);
3183 gas_assert (len
< 8);
3184 memmove (sub
+ len
, sub
+ 8,
3185 processed
.ptr
+ processed
.len
- (sub
+ 8));
3186 processed
.len
-= (8 - len
);
3187 sb_add_sb (& many
, & processed
);
3188 sb_kill (& processed
);
3193 sb_add_sb (&many
, &one
);
3197 input_scrub_include_sb (&many
, input_line_pointer
, 1);
3199 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3202 /* Skip to end of current repeat loop; EXTRA indicates how many additional
3203 input buffers to skip. Assumes that conditionals preceding the loop end
3204 are properly nested.
3206 This function makes it easier to implement a premature "break" out of the
3207 loop. The EXTRA arg accounts for other buffers we might have inserted,
3208 such as line substitutions. */
3211 end_repeat (int extra
)
3213 cond_exit_macro (macro_nest
);
3214 while (extra
-- >= 0)
3215 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3219 assign_symbol (char *name
, int mode
)
3223 if (name
[0] == '.' && name
[1] == '\0')
3225 /* Turn '. = mumble' into a .org mumble. */
3229 segment
= get_known_segmented_expression (&exp
);
3232 do_org (segment
, &exp
, 0);
3237 if ((symbolP
= symbol_find (name
)) == NULL
3238 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
3240 symbolP
= symbol_find_or_make (name
);
3242 /* When doing symbol listings, play games with dummy fragments living
3243 outside the normal fragment chain to record the file and line info
3245 if (listing
& LISTING_SYMBOLS
)
3247 extern struct list_info_struct
*listing_tail
;
3248 fragS
*dummy_frag
= XCNEW (fragS
);
3249 dummy_frag
->line
= listing_tail
;
3250 dummy_frag
->fr_symbol
= symbolP
;
3251 symbol_set_frag (symbolP
, dummy_frag
);
3254 #if defined (OBJ_COFF) && !defined (TE_PE)
3255 /* "set" symbols are local unless otherwise specified. */
3256 SF_SET_LOCAL (symbolP
);
3260 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3262 if ((mode
!= 0 || !S_IS_VOLATILE (symbolP
))
3263 && !S_CAN_BE_REDEFINED (symbolP
))
3265 as_bad (_("symbol `%s' is already defined"), name
);
3266 ignore_rest_of_line ();
3267 input_line_pointer
--;
3270 /* If the symbol is volatile, copy the symbol and replace the
3271 original with the copy, so that previous uses of the symbol will
3272 retain the value of the symbol at the point of use. */
3273 else if (S_IS_VOLATILE (symbolP
))
3274 symbolP
= symbol_clone (symbolP
, 1);
3278 S_SET_VOLATILE (symbolP
);
3280 S_SET_FORWARD_REF (symbolP
);
3282 pseudo_set (symbolP
);
3285 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3286 then this is .equiv, and it is an error if the symbol is already
3287 defined. If EQUIV is -1, the symbol additionally is a forward
3295 /* Especial apologies for the random logic:
3296 this just grew, and could be parsed much more simply!
3298 if ((name
= read_symbol_name ()) == NULL
)
3301 if (*input_line_pointer
!= ',')
3303 as_bad (_("expected comma after \"%s\""), name
);
3304 ignore_rest_of_line ();
3309 input_line_pointer
++;
3310 assign_symbol (name
, equiv
);
3311 demand_empty_rest_of_line ();
3325 #ifdef md_flush_pending_output
3326 md_flush_pending_output ();
3333 # ifndef P_PRECISION
3334 # define P_PRECISION X_PRECISION
3335 # define P_PRECISION_PAD X_PRECISION_PAD
3337 mult
= (X_PRECISION
+ X_PRECISION_PAD
) * sizeof (LITTLENUM_TYPE
);
3345 mult
= (P_PRECISION
+ P_PRECISION_PAD
) * sizeof (LITTLENUM_TYPE
);
3352 #ifdef md_cons_align
3357 stop
= mri_comment_field (&stopc
);
3359 /* In m68k MRI mode, we need to align to a word boundary, unless
3361 if (flag_m68k_mri
&& mult
> 1)
3363 if (now_seg
== absolute_section
)
3365 abs_section_offset
+= abs_section_offset
& 1;
3366 if (line_label
!= NULL
)
3367 S_SET_VALUE (line_label
, abs_section_offset
);
3369 else if (mri_common_symbol
!= NULL
)
3373 mri_val
= S_GET_VALUE (mri_common_symbol
);
3374 if ((mri_val
& 1) != 0)
3376 S_SET_VALUE (mri_common_symbol
, mri_val
+ 1);
3377 if (line_label
!= NULL
)
3379 expressionS
*symexp
;
3381 symexp
= symbol_get_value_expression (line_label
);
3382 know (symexp
->X_op
== O_symbol
);
3383 know (symexp
->X_add_symbol
== mri_common_symbol
);
3384 symexp
->X_add_number
+= 1;
3390 do_align (1, (char *) NULL
, 0, 0);
3391 if (line_label
!= NULL
)
3393 symbol_set_frag (line_label
, frag_now
);
3394 S_SET_VALUE (line_label
, frag_now_fix ());
3404 if (*input_line_pointer
== ',')
3406 ++input_line_pointer
;
3411 val
.X_op
= O_constant
;
3412 val
.X_add_number
= 0;
3415 if ((val
.X_op
!= O_constant
3416 || val
.X_add_number
< - 0x80
3417 || val
.X_add_number
> 0xff
3418 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
3419 && (now_seg
!= absolute_section
&& !in_bss ()))
3421 resolve_expression (&exp
);
3422 if (exp
.X_op
!= O_constant
)
3423 as_bad (_("unsupported variable size or fill value"));
3428 /* PR 20901: Check for excessive values.
3429 FIXME: 1<<10 is an arbitrary limit. Maybe use maxpagesize instead ? */
3430 if (exp
.X_add_number
< 0 || exp
.X_add_number
> (1 << 10))
3431 as_bad (_("size value for space directive too large: %lx"),
3432 (long) exp
.X_add_number
);
3437 bytes
= mult
* exp
.X_add_number
;
3439 for (i
= 0; i
< exp
.X_add_number
; i
++)
3440 emit_expr (&val
, mult
);
3446 if (now_seg
== absolute_section
|| mri_common_symbol
!= NULL
)
3447 resolve_expression (&exp
);
3449 if (exp
.X_op
== O_constant
)
3453 repeat
= exp
.X_add_number
;
3460 as_warn (_(".space repeat count is zero, ignored"));
3461 else if (repeat
< 0)
3462 as_warn (_(".space repeat count is negative, ignored"));
3466 /* If we are in the absolute section, just bump the offset. */
3467 if (now_seg
== absolute_section
)
3469 if (val
.X_op
!= O_constant
|| val
.X_add_number
!= 0)
3470 as_warn (_("ignoring fill value in absolute section"));
3471 abs_section_offset
+= repeat
;
3475 /* If we are secretly in an MRI common section, then
3476 creating space just increases the size of the common
3478 if (mri_common_symbol
!= NULL
)
3480 S_SET_VALUE (mri_common_symbol
,
3481 S_GET_VALUE (mri_common_symbol
) + repeat
);
3486 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
3487 (offsetT
) repeat
, (char *) 0);
3491 if (now_seg
== absolute_section
)
3493 as_bad (_("space allocation too complex in absolute section"));
3494 subseg_set (text_section
, 0);
3497 if (mri_common_symbol
!= NULL
)
3499 as_bad (_("space allocation too complex in common section"));
3500 mri_common_symbol
= NULL
;
3504 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
3505 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
3508 if ((val
.X_op
!= O_constant
|| val
.X_add_number
!= 0) && in_bss ())
3509 as_warn (_("ignoring fill value in section `%s'"),
3510 segment_name (now_seg
));
3512 *p
= val
.X_add_number
;
3517 /* In MRI mode, after an odd number of bytes, we must align to an
3518 even word boundary, unless the next instruction is a dc.b, ds.b
3520 if (flag_mri
&& (bytes
& 1) != 0)
3521 mri_pending_align
= 1;
3523 demand_empty_rest_of_line ();
3526 mri_comment_end (stop
, stopc
);
3530 s_nop (int ignore ATTRIBUTE_UNUSED
)
3537 #ifdef md_flush_pending_output
3538 md_flush_pending_output ();
3541 #ifdef md_cons_align
3547 demand_empty_rest_of_line ();
3550 start_off
= frag_now_fix ();
3553 #ifdef md_emit_single_noop
3554 md_emit_single_noop
;
3558 #ifndef md_single_noop_insn
3559 #define md_single_noop_insn "nop"
3561 /* md_assemble might modify its argument, so
3562 we must pass it a string that is writable. */
3563 if (asprintf (&nop
, "%s", md_single_noop_insn
) < 0)
3564 as_fatal ("%s", xstrerror (errno
));
3566 /* Some targets assume that they can update input_line_pointer
3567 inside md_assemble, and, worse, that they can leave it
3568 assigned to the string pointer that was provided as an
3569 argument. So preserve ilp here. */
3570 char *saved_ilp
= input_line_pointer
;
3572 input_line_pointer
= saved_ilp
;
3575 #ifdef md_flush_pending_output
3576 md_flush_pending_output ();
3578 } while (exp
.X_op
== O_constant
3579 && exp
.X_add_number
> 0
3580 && frag_offset_ignore_align_p (start
, frag_now
, &frag_off
)
3581 && frag_off
+ frag_now_fix () < start_off
+ exp
.X_add_number
);
3585 s_nops (int ignore ATTRIBUTE_UNUSED
)
3590 #ifdef md_flush_pending_output
3591 md_flush_pending_output ();
3594 #ifdef md_cons_align
3600 /* Note - this expression is tested for an absolute value in
3601 write.c:relax_segment(). */
3604 if (*input_line_pointer
== ',')
3606 ++input_line_pointer
;
3611 val
.X_op
= O_constant
;
3612 val
.X_add_number
= 0;
3615 if (val
.X_op
!= O_constant
)
3617 as_bad (_("unsupported variable nop control in .nops directive"));
3618 val
.X_op
= O_constant
;
3619 val
.X_add_number
= 0;
3621 else if (val
.X_add_number
< 0)
3623 as_warn (_("negative nop control byte, ignored"));
3624 val
.X_add_number
= 0;
3627 demand_empty_rest_of_line ();
3630 /* Ignore this directive if we are going to perform a second pass. */
3633 /* Store the no-op instruction control byte in the first byte of frag. */
3635 symbolS
*sym
= make_expr_symbol (&exp
);
3636 p
= frag_var (rs_space_nop
, 1, 1, (relax_substateT
) 0,
3637 sym
, (offsetT
) 0, (char *) 0);
3638 *p
= val
.X_add_number
;
3641 /* Obtain the size of a floating point number, given a type. */
3644 float_length (int float_type
, int *pad_p
)
3646 int length
, pad
= 0;
3674 length
= X_PRECISION
* sizeof (LITTLENUM_TYPE
);
3675 pad
= X_PRECISION_PAD
* sizeof (LITTLENUM_TYPE
);
3684 length
= P_PRECISION
* sizeof (LITTLENUM_TYPE
);
3685 pad
= P_PRECISION_PAD
* sizeof (LITTLENUM_TYPE
);
3692 as_bad (_("unknown floating type '%c'"), float_type
);
3704 parse_one_float (int float_type
, char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
])
3710 /* Skip any 0{letter} that may be present. Don't even check if the
3711 letter is legal. Someone may invent a "z" format and this routine
3712 has no use for such information. Lusers beware: you get
3713 diagnostics if your input is ill-conditioned. */
3714 if (input_line_pointer
[0] == '0'
3715 && ISALPHA (input_line_pointer
[1]))
3716 input_line_pointer
+= 2;
3718 /* Accept :xxxx, where the x's are hex digits, for a floating point
3719 with the exact digits specified. */
3720 if (input_line_pointer
[0] == ':')
3722 ++input_line_pointer
;
3723 length
= hex_float (float_type
, temp
);
3726 ignore_rest_of_line ();
3734 err
= md_atof (float_type
, temp
, &length
);
3735 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3736 know (err
!= NULL
|| length
> 0);
3739 as_bad (_("bad floating literal: %s"), err
);
3740 ignore_rest_of_line ();
3748 /* This is like s_space, but the value is a floating point number with
3749 the given precision. This is for the MRI dcb.s pseudo-op and
3753 s_float_space (int float_type
)
3757 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
3761 #ifdef md_cons_align
3766 stop
= mri_comment_field (&stopc
);
3768 count
= get_absolute_expression ();
3771 if (*input_line_pointer
!= ',')
3775 flen
= float_length (float_type
, &pad
);
3777 memset (temp
, 0, flen
+= pad
);
3781 ++input_line_pointer
;
3783 flen
= parse_one_float (float_type
, temp
);
3789 mri_comment_end (stop
, stopc
);
3793 while (--count
>= 0)
3797 p
= frag_more (flen
);
3798 memcpy (p
, temp
, (unsigned int) flen
);
3801 demand_empty_rest_of_line ();
3804 mri_comment_end (stop
, stopc
);
3807 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3810 s_struct (int ignore ATTRIBUTE_UNUSED
)
3816 stop
= mri_comment_field (&stopc
);
3817 abs_section_offset
= get_absolute_expression ();
3818 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3819 /* The ELF backend needs to know that we are changing sections, so
3820 that .previous works correctly. */
3822 obj_elf_section_change_hook ();
3824 subseg_set (absolute_section
, 0);
3825 demand_empty_rest_of_line ();
3827 mri_comment_end (stop
, stopc
);
3831 s_text (int ignore ATTRIBUTE_UNUSED
)
3835 temp
= get_absolute_expression ();
3836 subseg_set (text_section
, (subsegT
) temp
);
3837 demand_empty_rest_of_line ();
3840 /* .weakref x, y sets x as an alias to y that, as long as y is not
3841 referenced directly, will cause y to become a weak symbol. */
3843 s_weakref (int ignore ATTRIBUTE_UNUSED
)
3850 if ((name
= read_symbol_name ()) == NULL
)
3853 symbolP
= symbol_find_or_make (name
);
3855 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3857 if (!S_IS_VOLATILE (symbolP
))
3859 as_bad (_("symbol `%s' is already defined"), name
);
3862 symbolP
= symbol_clone (symbolP
, 1);
3863 S_CLEAR_VOLATILE (symbolP
);
3868 if (*input_line_pointer
!= ',')
3870 as_bad (_("expected comma after \"%s\""), name
);
3874 input_line_pointer
++;
3879 if ((name
= read_symbol_name ()) == NULL
)
3882 if ((symbolP2
= symbol_find_noref (name
, 1)) == NULL
3883 && (symbolP2
= md_undefined_symbol (name
)) == NULL
)
3885 symbolP2
= symbol_find_or_make (name
);
3886 S_SET_WEAKREFD (symbolP2
);
3890 symbolS
*symp
= symbolP2
;
3892 while (S_IS_WEAKREFR (symp
) && symp
!= symbolP
)
3894 expressionS
*expP
= symbol_get_value_expression (symp
);
3896 gas_assert (expP
->X_op
== O_symbol
3897 && expP
->X_add_number
== 0);
3898 symp
= expP
->X_add_symbol
;
3900 if (symp
== symbolP
)
3904 loop
= concat (S_GET_NAME (symbolP
),
3905 " => ", S_GET_NAME (symbolP2
), (const char *) NULL
);
3908 while (symp
!= symbolP
)
3910 char *old_loop
= loop
;
3912 symp
= symbol_get_value_expression (symp
)->X_add_symbol
;
3913 loop
= concat (loop
, " => ", S_GET_NAME (symp
),
3914 (const char *) NULL
);
3918 as_bad (_("%s: would close weakref loop: %s"),
3919 S_GET_NAME (symbolP
), loop
);
3923 ignore_rest_of_line ();
3927 /* Short-circuiting instead of just checking here might speed
3928 things up a tiny little bit, but loop error messages would
3929 miss intermediate links. */
3930 /* symbolP2 = symp; */
3933 memset (&exp
, 0, sizeof (exp
));
3934 exp
.X_op
= O_symbol
;
3935 exp
.X_add_symbol
= symbolP2
;
3937 S_SET_SEGMENT (symbolP
, undefined_section
);
3938 symbol_set_value_expression (symbolP
, &exp
);
3939 symbol_set_frag (symbolP
, &zero_address_frag
);
3940 S_SET_WEAKREFR (symbolP
);
3942 demand_empty_rest_of_line ();
3947 ignore_rest_of_line ();
3953 /* Verify that we are at the end of a line. If not, issue an error and
3957 demand_empty_rest_of_line (void)
3960 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3961 input_line_pointer
++;
3964 if (ISPRINT (*input_line_pointer
))
3965 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3966 *input_line_pointer
);
3968 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3969 *input_line_pointer
);
3970 ignore_rest_of_line ();
3973 /* Return pointing just after end-of-line. */
3974 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3977 /* Silently advance to the end of line. Use this after already having
3978 issued an error about something bad. */
3981 ignore_rest_of_line (void)
3983 while (input_line_pointer
< buffer_limit
3984 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3985 input_line_pointer
++;
3987 input_line_pointer
++;
3989 /* Return pointing just after end-of-line. */
3990 if (input_line_pointer
<= buffer_limit
)
3991 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3994 /* Sets frag for given symbol to zero_address_frag, except when the
3995 symbol frag is already set to a dummy listing frag. */
3998 set_zero_frag (symbolS
*symbolP
)
4000 if (symbol_get_frag (symbolP
)->fr_type
!= rs_dummy
)
4001 symbol_set_frag (symbolP
, &zero_address_frag
);
4004 /* In: Pointer to a symbol.
4005 Input_line_pointer->expression.
4007 Out: Input_line_pointer->just after any whitespace after expression.
4008 Tried to set symbol to value of expression.
4009 Will change symbols type, value, and frag; */
4012 pseudo_set (symbolS
*symbolP
)
4017 know (symbolP
); /* NULL pointer is logic error. */
4019 if (!S_IS_FORWARD_REF (symbolP
))
4020 (void) expression (&exp
);
4022 (void) deferred_expression (&exp
);
4024 if (exp
.X_op
== O_illegal
)
4025 as_bad (_("illegal expression"));
4026 else if (exp
.X_op
== O_absent
)
4027 as_bad (_("missing expression"));
4028 else if (exp
.X_op
== O_big
)
4030 if (exp
.X_add_number
> 0)
4031 as_bad (_("bignum invalid"));
4033 as_bad (_("floating point number invalid"));
4035 else if (exp
.X_op
== O_subtract
4036 && !S_IS_FORWARD_REF (symbolP
)
4037 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
4038 && (symbol_get_frag (exp
.X_add_symbol
)
4039 == symbol_get_frag (exp
.X_op_symbol
)))
4041 exp
.X_op
= O_constant
;
4042 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
4043 - S_GET_VALUE (exp
.X_op_symbol
));
4046 if (symbol_section_p (symbolP
))
4048 as_bad ("attempt to set value of section symbol");
4057 exp
.X_add_number
= 0;
4060 S_SET_SEGMENT (symbolP
, absolute_section
);
4061 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
4062 set_zero_frag (symbolP
);
4066 #ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
4067 if (S_IS_EXTERNAL (symbolP
))
4069 as_bad ("can't equate global symbol `%s' with register name",
4070 S_GET_NAME (symbolP
));
4074 S_SET_SEGMENT (symbolP
, reg_section
);
4075 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
4076 set_zero_frag (symbolP
);
4077 symbol_get_value_expression (symbolP
)->X_op
= O_register
;
4081 seg
= S_GET_SEGMENT (exp
.X_add_symbol
);
4082 /* For x=undef+const, create an expression symbol.
4083 For x=x+const, just update x except when x is an undefined symbol
4084 For x=defined+const, evaluate x. */
4085 if (symbolP
== exp
.X_add_symbol
4086 && (seg
!= undefined_section
4087 || !symbol_constant_p (symbolP
)))
4089 *symbol_X_add_number (symbolP
) += exp
.X_add_number
;
4092 else if (!S_IS_FORWARD_REF (symbolP
) && seg
!= undefined_section
)
4094 symbolS
*s
= exp
.X_add_symbol
;
4096 if (S_IS_COMMON (s
))
4097 as_bad (_("`%s' can't be equated to common symbol `%s'"),
4098 S_GET_NAME (symbolP
), S_GET_NAME (s
));
4100 S_SET_SEGMENT (symbolP
, seg
);
4101 S_SET_VALUE (symbolP
, exp
.X_add_number
+ S_GET_VALUE (s
));
4102 symbol_set_frag (symbolP
, symbol_get_frag (s
));
4103 copy_symbol_attributes (symbolP
, s
);
4106 S_SET_SEGMENT (symbolP
, undefined_section
);
4107 symbol_set_value_expression (symbolP
, &exp
);
4108 copy_symbol_attributes (symbolP
, exp
.X_add_symbol
);
4109 set_zero_frag (symbolP
);
4113 /* The value is some complex expression. */
4114 S_SET_SEGMENT (symbolP
, expr_section
);
4115 symbol_set_value_expression (symbolP
, &exp
);
4116 set_zero_frag (symbolP
);
4123 CONStruct more frag of .bytes, or .words etc.
4124 Should need_pass_2 be 1 then emit no frag(s).
4125 This understands EXPRESSIONS.
4129 This has a split personality. We use expression() to read the
4130 value. We can detect if the value won't fit in a byte or word.
4131 But we can't detect if expression() discarded significant digits
4132 in the case of a long. Not worth the crocks required to fix it. */
4134 /* Select a parser for cons expressions. */
4136 /* Some targets need to parse the expression in various fancy ways.
4137 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
4138 (for example, the HPPA does this). Otherwise, you can define
4139 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
4140 are defined, which is the normal case, then only simple expressions
4145 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
4148 #ifndef TC_PARSE_CONS_EXPRESSION
4149 #ifdef REPEAT_CONS_EXPRESSIONS
4150 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
4151 (parse_repeat_cons (EXP, NBYTES), TC_PARSE_CONS_RETURN_NONE)
4153 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
4156 /* If we haven't gotten one yet, just call expression. */
4157 #ifndef TC_PARSE_CONS_EXPRESSION
4158 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
4159 (expression (EXP), TC_PARSE_CONS_RETURN_NONE)
4164 do_parse_cons_expression (expressionS
*exp
,
4165 int nbytes ATTRIBUTE_UNUSED
)
4167 (void) TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
4171 /* Worker to do .byte etc statements.
4172 Clobbers input_line_pointer and checks end-of-line. */
4175 cons_worker (int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
4183 #ifdef md_flush_pending_output
4184 md_flush_pending_output ();
4188 stop
= mri_comment_field (&stopc
);
4190 if (is_it_end_of_statement ())
4192 demand_empty_rest_of_line ();
4194 mri_comment_end (stop
, stopc
);
4199 nbytes
= TC_ADDRESS_BYTES ();
4201 #ifdef md_cons_align
4202 md_cons_align (nbytes
);
4208 TC_PARSE_CONS_RETURN_TYPE ret
= TC_PARSE_CONS_RETURN_NONE
;
4209 #ifdef TC_CONS_FIX_CHECK
4210 fixS
**cur_fix
= &frchain_now
->fix_tail
;
4212 if (*cur_fix
!= NULL
)
4213 cur_fix
= &(*cur_fix
)->fx_next
;
4218 parse_mri_cons (&exp
, (unsigned int) nbytes
);
4223 if (*input_line_pointer
== '"')
4225 as_bad (_("unexpected `\"' in expression"));
4226 ignore_rest_of_line ();
4230 ret
= TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
4235 if (exp
.X_op
== O_symbol
)
4236 exp
.X_op
= O_symbol_rva
;
4238 as_fatal (_("rva without symbol"));
4240 emit_expr_with_reloc (&exp
, (unsigned int) nbytes
, ret
);
4241 #ifdef TC_CONS_FIX_CHECK
4242 TC_CONS_FIX_CHECK (&exp
, nbytes
, *cur_fix
);
4246 while (*input_line_pointer
++ == ',');
4248 /* In MRI mode, after an odd number of bytes, we must align to an
4249 even word boundary, unless the next instruction is a dc.b, ds.b
4251 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
4252 mri_pending_align
= 1;
4254 input_line_pointer
--; /* Put terminator back into stream. */
4256 demand_empty_rest_of_line ();
4259 mri_comment_end (stop
, stopc
);
4265 cons_worker (size
, 0);
4271 cons_worker (size
, 1);
4274 /* .reloc offset, reloc_name, symbol+addend. */
4277 s_reloc (int ignore ATTRIBUTE_UNUSED
)
4284 struct reloc_list
*reloc
;
4285 struct _bfd_rel
{ const char * name
; bfd_reloc_code_real_type code
; };
4286 static struct _bfd_rel bfd_relocs
[] =
4288 { "NONE", BFD_RELOC_NONE
},
4289 { "8", BFD_RELOC_8
},
4290 { "16", BFD_RELOC_16
},
4291 { "32", BFD_RELOC_32
},
4292 { "64", BFD_RELOC_64
}
4295 reloc
= XNEW (struct reloc_list
);
4298 stop
= mri_comment_field (&stopc
);
4307 as_bad (_("missing or bad offset expression"));
4310 exp
.X_add_symbol
= section_symbol (now_seg
);
4311 /* Mark the section symbol used in relocation so that it will be
4312 included in the symbol table. */
4313 symbol_mark_used_in_reloc (exp
.X_add_symbol
);
4314 exp
.X_op
= O_symbol
;
4317 if (exp
.X_add_number
== 0)
4319 reloc
->u
.a
.offset_sym
= exp
.X_add_symbol
;
4324 reloc
->u
.a
.offset_sym
= make_expr_symbol (&exp
);
4329 if (*input_line_pointer
!= ',')
4331 as_bad (_("missing reloc type"));
4335 ++input_line_pointer
;
4337 c
= get_symbol_name (& r_name
);
4338 if (strncasecmp (r_name
, "BFD_RELOC_", 10) == 0)
4342 for (reloc
->u
.a
.howto
= NULL
, i
= 0; i
< ARRAY_SIZE (bfd_relocs
); i
++)
4343 if (strcasecmp (r_name
+ 10, bfd_relocs
[i
].name
) == 0)
4345 reloc
->u
.a
.howto
= bfd_reloc_type_lookup (stdoutput
,
4346 bfd_relocs
[i
].code
);
4351 reloc
->u
.a
.howto
= bfd_reloc_name_lookup (stdoutput
, r_name
);
4352 *input_line_pointer
= c
;
4353 if (reloc
->u
.a
.howto
== NULL
)
4355 as_bad (_("unrecognized reloc type"));
4359 exp
.X_op
= O_absent
;
4360 SKIP_WHITESPACE_AFTER_NAME ();
4361 if (*input_line_pointer
== ',')
4363 ++input_line_pointer
;
4371 as_bad (_("bad reloc expression"));
4373 ignore_rest_of_line ();
4376 mri_comment_end (stop
, stopc
);
4379 reloc
->u
.a
.sym
= NULL
;
4380 reloc
->u
.a
.addend
= 0;
4383 reloc
->u
.a
.sym
= NULL
;
4384 reloc
->u
.a
.addend
= exp
.X_add_number
;
4387 reloc
->u
.a
.sym
= exp
.X_add_symbol
;
4388 reloc
->u
.a
.addend
= exp
.X_add_number
;
4391 reloc
->u
.a
.sym
= make_expr_symbol (&exp
);
4392 reloc
->u
.a
.addend
= 0;
4396 reloc
->file
= as_where (&reloc
->line
);
4397 reloc
->next
= reloc_list
;
4400 demand_empty_rest_of_line ();
4402 mri_comment_end (stop
, stopc
);
4405 /* Put the contents of expression EXP into the object file using
4406 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
4409 emit_expr (expressionS
*exp
, unsigned int nbytes
)
4411 emit_expr_with_reloc (exp
, nbytes
, TC_PARSE_CONS_RETURN_NONE
);
4415 emit_expr_with_reloc (expressionS
*exp
,
4416 unsigned int nbytes
,
4417 TC_PARSE_CONS_RETURN_TYPE reloc
)
4421 valueT extra_digit
= 0;
4423 /* Don't do anything if we are going to make another pass. */
4428 dot_value
= frag_now_fix ();
4429 dot_frag
= frag_now
;
4433 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
4434 appear as a four byte positive constant in the .line section,
4435 followed by a 2 byte 0xffff. Look for that case here. */
4437 static int dwarf_line
= -1;
4439 if (strcmp (segment_name (now_seg
), ".line") != 0)
4441 else if (dwarf_line
>= 0
4443 && exp
->X_op
== O_constant
4444 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
4445 listing_source_line ((unsigned int) dwarf_line
);
4446 else if (nbytes
== 4
4447 && exp
->X_op
== O_constant
4448 && exp
->X_add_number
>= 0)
4449 dwarf_line
= exp
->X_add_number
;
4454 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
4455 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
4456 AT_sibling (0x12) followed by a four byte address of the sibling
4457 followed by a 2 byte AT_name (0x38) followed by the name of the
4458 file. We look for that case here. */
4460 static int dwarf_file
= 0;
4462 if (strcmp (segment_name (now_seg
), ".debug") != 0)
4464 else if (dwarf_file
== 0
4466 && exp
->X_op
== O_constant
4467 && exp
->X_add_number
== 0x11)
4469 else if (dwarf_file
== 1
4471 && exp
->X_op
== O_constant
4472 && exp
->X_add_number
== 0x12)
4474 else if (dwarf_file
== 2
4477 else if (dwarf_file
== 3
4479 && exp
->X_op
== O_constant
4480 && exp
->X_add_number
== 0x38)
4485 /* The variable dwarf_file_string tells stringer that the string
4486 may be the name of the source file. */
4487 if (dwarf_file
== 4)
4488 dwarf_file_string
= 1;
4490 dwarf_file_string
= 0;
4495 if (check_eh_frame (exp
, &nbytes
))
4500 /* Handle a negative bignum. */
4502 && exp
->X_add_number
== 0
4503 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
4504 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
4507 unsigned long carry
;
4509 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
4511 /* Negate the bignum: one's complement each digit and add 1. */
4513 for (i
= 0; i
< exp
->X_add_number
; i
++)
4517 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
4520 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
4521 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
4524 /* We can ignore any carry out, because it will be handled by
4525 extra_digit if it is needed. */
4527 extra_digit
= (valueT
) -1;
4531 if (op
== O_absent
|| op
== O_illegal
)
4533 as_warn (_("zero assumed for missing expression"));
4534 exp
->X_add_number
= 0;
4537 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4539 as_bad (_("floating point number invalid"));
4540 exp
->X_add_number
= 0;
4543 else if (op
== O_register
)
4545 as_warn (_("register value used as expression"));
4549 /* Allow `.word 0' in the absolute section. */
4550 if (now_seg
== absolute_section
)
4552 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
4553 as_bad (_("attempt to store value in absolute section"));
4554 abs_section_offset
+= nbytes
;
4558 /* Allow `.word 0' in BSS style sections. */
4559 if ((op
!= O_constant
|| exp
->X_add_number
!= 0) && in_bss ())
4560 as_bad (_("attempt to store non-zero value in section `%s'"),
4561 segment_name (now_seg
));
4563 p
= frag_more ((int) nbytes
);
4565 if (reloc
!= TC_PARSE_CONS_RETURN_NONE
)
4567 emit_expr_fix (exp
, nbytes
, frag_now
, p
, reloc
);
4571 #ifndef WORKING_DOT_WORD
4572 /* If we have the difference of two symbols in a word, save it on
4573 the broken_words list. See the code in write.c. */
4574 if (op
== O_subtract
&& nbytes
== 2)
4576 struct broken_word
*x
;
4578 x
= XNEW (struct broken_word
);
4579 x
->next_broken_word
= broken_words
;
4582 x
->subseg
= now_subseg
;
4584 x
->word_goes_here
= p
;
4586 x
->add
= exp
->X_add_symbol
;
4587 x
->sub
= exp
->X_op_symbol
;
4588 x
->addnum
= exp
->X_add_number
;
4596 /* If we have an integer, but the number of bytes is too large to
4597 pass to md_number_to_chars, handle it as a bignum. */
4598 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
4600 extra_digit
= exp
->X_unsigned
? 0 : -1;
4601 convert_to_bignum (exp
, !exp
->X_unsigned
);
4605 if (op
== O_constant
)
4612 /* JF << of >= number of bits in the object is undefined. In
4613 particular SPARC (Sun 4) has problems. */
4614 if (nbytes
>= sizeof (valueT
))
4616 know (nbytes
== sizeof (valueT
));
4621 /* Don't store these bits. */
4622 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
4625 unmask
= ~mask
; /* Do store these bits. */
4628 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
4629 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
4632 get
= exp
->X_add_number
;
4634 if ((get
& mask
) != 0 && (-get
& mask
) != 0)
4639 /* These buffers help to ease the translation of the warning message. */
4640 sprintf_vma (get_buf
, get
);
4641 sprintf_vma (use_buf
, use
);
4642 /* Leading bits contain both 0s & 1s. */
4643 as_warn (_("value 0x%s truncated to 0x%s"), get_buf
, use_buf
);
4645 /* Put bytes in right order. */
4646 md_number_to_chars (p
, use
, (int) nbytes
);
4648 else if (op
== O_big
)
4651 LITTLENUM_TYPE
*nums
;
4653 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
4656 int i
= nbytes
/ CHARS_PER_LITTLENUM
;
4660 LITTLENUM_TYPE sign
= 0;
4661 if ((generic_bignum
[--i
]
4662 & (1 << (LITTLENUM_NUMBER_OF_BITS
- 1))) != 0)
4663 sign
= ~(LITTLENUM_TYPE
) 0;
4665 while (++i
< exp
->X_add_number
)
4666 if (generic_bignum
[i
] != sign
)
4669 else if (nbytes
== 1)
4671 /* We have nbytes == 1 and CHARS_PER_LITTLENUM == 2 (probably).
4672 Check that bits 8.. of generic_bignum[0] match bit 7
4673 and that they match all of generic_bignum[1..exp->X_add_number]. */
4674 LITTLENUM_TYPE sign
= (generic_bignum
[0] & (1 << 7)) ? -1 : 0;
4675 LITTLENUM_TYPE himask
= LITTLENUM_MASK
& ~ 0xFF;
4677 if ((generic_bignum
[0] & himask
) == (sign
& himask
))
4679 while (++i
< exp
->X_add_number
)
4680 if (generic_bignum
[i
] != sign
)
4685 if (i
< exp
->X_add_number
)
4686 as_warn (ngettext ("bignum truncated to %d byte",
4687 "bignum truncated to %d bytes",
4695 md_number_to_chars (p
, (valueT
) generic_bignum
[0], 1);
4698 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
4700 if (target_big_endian
)
4702 while (nbytes
> size
)
4704 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4705 nbytes
-= CHARS_PER_LITTLENUM
;
4706 p
+= CHARS_PER_LITTLENUM
;
4709 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
4710 while (size
>= CHARS_PER_LITTLENUM
)
4713 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4714 size
-= CHARS_PER_LITTLENUM
;
4715 p
+= CHARS_PER_LITTLENUM
;
4720 nums
= generic_bignum
;
4721 while (size
>= CHARS_PER_LITTLENUM
)
4723 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4725 size
-= CHARS_PER_LITTLENUM
;
4726 p
+= CHARS_PER_LITTLENUM
;
4727 nbytes
-= CHARS_PER_LITTLENUM
;
4730 while (nbytes
>= CHARS_PER_LITTLENUM
)
4732 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4733 nbytes
-= CHARS_PER_LITTLENUM
;
4734 p
+= CHARS_PER_LITTLENUM
;
4739 emit_expr_fix (exp
, nbytes
, frag_now
, p
, TC_PARSE_CONS_RETURN_NONE
);
4743 emit_expr_fix (expressionS
*exp
, unsigned int nbytes
, fragS
*frag
, char *p
,
4744 TC_PARSE_CONS_RETURN_TYPE r ATTRIBUTE_UNUSED
)
4747 unsigned int size
= nbytes
;
4749 memset (p
, 0, size
);
4751 /* Generate a fixS to record the symbol value. */
4753 #ifdef TC_CONS_FIX_NEW
4754 TC_CONS_FIX_NEW (frag
, p
- frag
->fr_literal
+ offset
, size
, exp
, r
);
4756 if (r
!= TC_PARSE_CONS_RETURN_NONE
)
4758 reloc_howto_type
*reloc_howto
;
4760 reloc_howto
= bfd_reloc_type_lookup (stdoutput
, r
);
4761 size
= bfd_get_reloc_size (reloc_howto
);
4765 as_bad (ngettext ("%s relocations do not fit in %u byte",
4766 "%s relocations do not fit in %u bytes",
4768 reloc_howto
->name
, nbytes
);
4771 else if (target_big_endian
)
4772 offset
= nbytes
- size
;
4793 as_bad (_("unsupported BFD relocation size %u"), size
);
4796 fix_new_exp (frag
, p
- frag
->fr_literal
+ offset
, size
,
4801 /* Handle an MRI style string expression. */
4805 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
)
4807 if (*input_line_pointer
!= '\''
4808 && (input_line_pointer
[1] != '\''
4809 || (*input_line_pointer
!= 'A'
4810 && *input_line_pointer
!= 'E')))
4811 (void) TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
4815 unsigned int result
= 0;
4817 /* An MRI style string. Cut into as many bytes as will fit into
4818 a nbyte chunk, left justify if necessary, and separate with
4819 commas so we can try again later. */
4820 if (*input_line_pointer
== 'A')
4821 ++input_line_pointer
;
4822 else if (*input_line_pointer
== 'E')
4824 as_bad (_("EBCDIC constants are not supported"));
4825 ++input_line_pointer
;
4828 input_line_pointer
++;
4829 for (scan
= 0; scan
< nbytes
; scan
++)
4831 if (*input_line_pointer
== '\'')
4833 if (input_line_pointer
[1] == '\'')
4835 input_line_pointer
++;
4840 result
= (result
<< 8) | (*input_line_pointer
++);
4844 while (scan
< nbytes
)
4850 /* Create correct expression. */
4851 exp
->X_op
= O_constant
;
4852 exp
->X_add_number
= result
;
4854 /* Fake it so that we can read the next char too. */
4855 if (input_line_pointer
[0] != '\'' ||
4856 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
4858 input_line_pointer
-= 2;
4859 input_line_pointer
[0] = ',';
4860 input_line_pointer
[1] = '\'';
4863 input_line_pointer
++;
4866 #endif /* TC_M68K */
4868 #ifdef REPEAT_CONS_EXPRESSIONS
4870 /* Parse a repeat expression for cons. This is used by the MIPS
4871 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4872 object file COUNT times.
4874 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4877 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
)
4884 if (*input_line_pointer
!= ':')
4886 /* No repeat count. */
4890 ++input_line_pointer
;
4891 expression (&count
);
4892 if (count
.X_op
!= O_constant
4893 || count
.X_add_number
<= 0)
4895 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4899 /* The cons function is going to output this expression once. So we
4900 output it count - 1 times. */
4901 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
4902 emit_expr (exp
, nbytes
);
4905 #endif /* REPEAT_CONS_EXPRESSIONS */
4907 /* Parse a floating point number represented as a hex constant. This
4908 permits users to specify the exact bits they want in the floating
4912 hex_float (int float_type
, char *bytes
)
4914 int pad
, length
= float_length (float_type
, &pad
);
4920 /* It would be nice if we could go through expression to parse the
4921 hex constant, but if we get a bignum it's a pain to sort it into
4922 the buffer correctly. */
4924 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4928 /* The MRI assembler accepts arbitrary underscores strewn about
4929 through the hex constant, so we ignore them as well. */
4930 if (*input_line_pointer
== '_')
4932 ++input_line_pointer
;
4938 as_warn (_("floating point constant too large"));
4941 d
= hex_value (*input_line_pointer
) << 4;
4942 ++input_line_pointer
;
4943 while (*input_line_pointer
== '_')
4944 ++input_line_pointer
;
4945 if (hex_p (*input_line_pointer
))
4947 d
+= hex_value (*input_line_pointer
);
4948 ++input_line_pointer
;
4950 if (target_big_endian
)
4953 bytes
[length
- i
- 1] = d
;
4959 if (target_big_endian
)
4960 memset (bytes
+ i
, 0, length
- i
);
4962 memset (bytes
, 0, length
- i
);
4965 memset (bytes
+ length
, 0, pad
);
4967 return length
+ pad
;
4972 CONStruct some more frag chars of .floats .ffloats etc.
4973 Makes 0 or more new frags.
4974 If need_pass_2 == 1, no frags are emitted.
4975 This understands only floating literals, not expressions. Sorry.
4977 A floating constant is defined by atof_generic(), except it is preceded
4978 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4979 reading, I decided to be incompatible. This always tries to give you
4980 rounded bits to the precision of the pseudo-op. Former AS did premature
4981 truncation, restored noisy bits instead of trailing 0s AND gave you
4982 a choice of 2 flavours of noise according to which of 2 floating-point
4983 scanners you directed AS to use.
4985 In: input_line_pointer->whitespace before, or '0' of flonum. */
4988 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4989 int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4992 int length
; /* Number of chars in an object. */
4993 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4995 if (is_it_end_of_statement ())
4997 demand_empty_rest_of_line ();
5001 if (now_seg
== absolute_section
)
5003 as_bad (_("attempt to store float in absolute section"));
5004 ignore_rest_of_line ();
5010 as_bad (_("attempt to store float in section `%s'"),
5011 segment_name (now_seg
));
5012 ignore_rest_of_line ();
5016 #ifdef md_flush_pending_output
5017 md_flush_pending_output ();
5020 #ifdef md_cons_align
5026 length
= parse_one_float (float_type
, temp
);
5036 #ifdef REPEAT_CONS_EXPRESSIONS
5037 if (*input_line_pointer
== ':')
5039 expressionS count_exp
;
5041 ++input_line_pointer
;
5042 expression (&count_exp
);
5044 if (count_exp
.X_op
!= O_constant
5045 || count_exp
.X_add_number
<= 0)
5046 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
5048 count
= count_exp
.X_add_number
;
5052 while (--count
>= 0)
5054 p
= frag_more (length
);
5055 memcpy (p
, temp
, (unsigned int) length
);
5060 while (*input_line_pointer
++ == ',');
5062 /* Put terminator back into stream. */
5063 --input_line_pointer
;
5064 demand_empty_rest_of_line ();
5069 Note - we are using the DWARF standard's definition of LEB128 encoding
5070 where each 7-bit value is a stored in a byte, *not* an octet. This
5071 means that on targets where a byte contains multiple octets there is
5072 a *huge waste of space*. (This also means that we do not have to
5073 have special versions of these functions for when OCTETS_PER_BYTE_POWER
5076 If the 7-bit values were to be packed into N-bit bytes (where N > 8)
5077 we would then have to consider whether multiple, successive LEB128
5078 values should be packed into the bytes without padding (bad idea) or
5079 whether each LEB128 number is padded out to a whole number of bytes.
5080 Plus you have to decide on the endianness of packing octets into a
5083 /* Return the size of a LEB128 value in bytes. */
5085 static inline unsigned int
5086 sizeof_sleb128 (offsetT value
)
5093 byte
= (value
& 0x7f);
5094 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
5095 Fortunately, we can structure things so that the extra work reduces
5096 to a noop on systems that do things "properly". */
5097 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
5100 while (!(((value
== 0) && ((byte
& 0x40) == 0))
5101 || ((value
== -1) && ((byte
& 0x40) != 0))));
5106 static inline unsigned int
5107 sizeof_uleb128 (valueT value
)
5122 sizeof_leb128 (valueT value
, int sign
)
5125 return sizeof_sleb128 ((offsetT
) value
);
5127 return sizeof_uleb128 (value
);
5130 /* Output a LEB128 value. Returns the number of bytes used. */
5132 static inline unsigned int
5133 output_sleb128 (char *p
, offsetT value
)
5140 unsigned byte
= (value
& 0x7f);
5142 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
5143 Fortunately, we can structure things so that the extra work reduces
5144 to a noop on systems that do things "properly". */
5145 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
5147 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
5148 || ((value
== -1) && ((byte
& 0x40) != 0))));
5159 static inline unsigned int
5160 output_uleb128 (char *p
, valueT value
)
5166 unsigned byte
= (value
& 0x7f);
5170 /* More bytes to follow. */
5181 output_leb128 (char *p
, valueT value
, int sign
)
5184 return output_sleb128 (p
, (offsetT
) value
);
5186 return output_uleb128 (p
, value
);
5189 /* Do the same for bignums. We combine sizeof with output here in that
5190 we don't output for NULL values of P. It isn't really as critical as
5191 for "normal" values that this be streamlined. Returns the number of
5194 static inline unsigned int
5195 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
)
5202 /* Strip leading sign extensions off the bignum. */
5204 && bignum
[size
- 1] == LITTLENUM_MASK
5205 && bignum
[size
- 2] > LITTLENUM_MASK
/ 2)
5210 /* OR in the next part of the littlenum. */
5211 val
|= (*bignum
<< loaded
);
5212 loaded
+= LITTLENUM_NUMBER_OF_BITS
;
5216 /* Add bytes until there are less than 7 bits left in VAL
5217 or until every non-sign bit has been written. */
5224 || val
!= ((byte
& 0x40) == 0 ? 0 : ((valueT
) 1 << loaded
) - 1))
5231 while ((byte
& 0x80) != 0 && loaded
>= 7);
5235 /* Mop up any left-over bits (of which there will be less than 7). */
5236 if ((byte
& 0x80) != 0)
5238 /* Sign-extend VAL. */
5239 if (val
& (1 << (loaded
- 1)))
5240 val
|= ~0U << loaded
;
5249 static inline unsigned int
5250 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
)
5257 /* Strip leading zeros off the bignum. */
5258 /* XXX: Is this needed? */
5259 while (size
> 0 && bignum
[size
- 1] == 0)
5264 if (loaded
< 7 && size
> 0)
5266 val
|= (*bignum
<< loaded
);
5267 loaded
+= 8 * CHARS_PER_LITTLENUM
;
5276 if (size
> 0 || val
)
5283 while (byte
& 0x80);
5289 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
, int sign
)
5292 return output_big_sleb128 (p
, bignum
, size
);
5294 return output_big_uleb128 (p
, bignum
, size
);
5297 /* Generate the appropriate fragments for a given expression to emit a
5298 leb128 value. SIGN is 1 for sleb, 0 for uleb. */
5301 emit_leb128_expr (expressionS
*exp
, int sign
)
5303 operatorT op
= exp
->X_op
;
5304 unsigned int nbytes
;
5306 if (op
== O_absent
|| op
== O_illegal
)
5308 as_warn (_("zero assumed for missing expression"));
5309 exp
->X_add_number
= 0;
5312 else if (op
== O_big
&& exp
->X_add_number
<= 0)
5314 as_bad (_("floating point number invalid"));
5315 exp
->X_add_number
= 0;
5318 else if (op
== O_register
)
5320 as_warn (_("register value used as expression"));
5323 else if (op
== O_constant
5325 && (exp
->X_add_number
< 0) == !exp
->X_extrabit
)
5327 /* We're outputting a signed leb128 and the sign of X_add_number
5328 doesn't reflect the sign of the original value. Convert EXP
5329 to a correctly-extended bignum instead. */
5330 convert_to_bignum (exp
, exp
->X_extrabit
);
5334 if (now_seg
== absolute_section
)
5336 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
5337 as_bad (_("attempt to store value in absolute section"));
5338 abs_section_offset
++;
5342 if ((op
!= O_constant
|| exp
->X_add_number
!= 0) && in_bss ())
5343 as_bad (_("attempt to store non-zero value in section `%s'"),
5344 segment_name (now_seg
));
5346 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
5347 a signal that this is leb128 data. It shouldn't optimize this away. */
5348 nbytes
= (unsigned int) -1;
5349 if (check_eh_frame (exp
, &nbytes
))
5352 /* Let the backend know that subsequent data may be byte aligned. */
5353 #ifdef md_cons_align
5357 if (op
== O_constant
)
5359 /* If we've got a constant, emit the thing directly right now. */
5361 valueT value
= exp
->X_add_number
;
5365 size
= sizeof_leb128 (value
, sign
);
5366 p
= frag_more (size
);
5367 if (output_leb128 (p
, value
, sign
) > size
)
5370 else if (op
== O_big
)
5372 /* O_big is a different sort of constant. */
5373 int nbr_digits
= exp
->X_add_number
;
5377 /* If the leading littenum is 0xffff, prepend a 0 to avoid confusion with
5378 a signed number. Unary operators like - or ~ always extend the
5379 bignum to its largest size. */
5381 && nbr_digits
< SIZE_OF_LARGE_NUMBER
5382 && generic_bignum
[nbr_digits
- 1] == LITTLENUM_MASK
)
5383 generic_bignum
[nbr_digits
++] = 0;
5385 size
= output_big_leb128 (NULL
, generic_bignum
, nbr_digits
, sign
);
5386 p
= frag_more (size
);
5387 if (output_big_leb128 (p
, generic_bignum
, nbr_digits
, sign
) > size
)
5392 /* Otherwise, we have to create a variable sized fragment and
5393 resolve things later. */
5395 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
5396 make_expr_symbol (exp
), 0, (char *) NULL
);
5400 /* Parse the .sleb128 and .uleb128 pseudos. */
5407 #ifdef md_flush_pending_output
5408 md_flush_pending_output ();
5414 emit_leb128_expr (&exp
, sign
);
5416 while (*input_line_pointer
++ == ',');
5418 input_line_pointer
--;
5419 demand_empty_rest_of_line ();
5423 stringer_append_char (int c
, int bitsize
)
5426 as_bad (_("attempt to store non-empty string in section `%s'"),
5427 segment_name (now_seg
));
5429 if (!target_big_endian
)
5430 FRAG_APPEND_1_CHAR (c
);
5435 FRAG_APPEND_1_CHAR (0);
5436 FRAG_APPEND_1_CHAR (0);
5437 FRAG_APPEND_1_CHAR (0);
5438 FRAG_APPEND_1_CHAR (0);
5441 FRAG_APPEND_1_CHAR (0);
5442 FRAG_APPEND_1_CHAR (0);
5445 FRAG_APPEND_1_CHAR (0);
5450 /* Called with invalid bitsize argument. */
5454 if (target_big_endian
)
5455 FRAG_APPEND_1_CHAR (c
);
5458 /* Worker to do .ascii etc statements.
5459 Reads 0 or more ',' separated, double-quoted strings.
5460 Caller should have checked need_pass_2 is FALSE because we don't
5462 Checks for end-of-line.
5463 BITS_APPENDZERO says how many bits are in a target char.
5464 The bottom bit is set if a NUL char should be appended to the strings. */
5467 stringer (int bits_appendzero
)
5469 const int bitsize
= bits_appendzero
& ~7;
5470 const int append_zero
= bits_appendzero
& 1;
5472 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5476 #ifdef md_flush_pending_output
5477 md_flush_pending_output ();
5480 #ifdef md_cons_align
5484 /* If we have been switched into the abs_section then we
5485 will not have an obstack onto which we can hang strings. */
5486 if (now_seg
== absolute_section
)
5488 as_bad (_("strings must be placed into a section"));
5489 ignore_rest_of_line ();
5493 /* The following awkward logic is to parse ZERO or more strings,
5494 comma separated. Recall a string expression includes spaces
5495 before the opening '\"' and spaces after the closing '\"'.
5496 We fake a leading ',' if there is (supposed to be)
5497 a 1st, expression. We keep demanding expressions for each ','. */
5498 if (is_it_end_of_statement ())
5500 c
= 0; /* Skip loop. */
5501 ++input_line_pointer
; /* Compensate for end of loop. */
5505 c
= ','; /* Do loop. */
5508 while (c
== ',' || c
== '<' || c
== '"')
5511 switch (*input_line_pointer
)
5514 ++input_line_pointer
; /*->1st char of string. */
5515 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5516 start
= input_line_pointer
;
5519 while (is_a_char (c
= next_char_of_string ()))
5520 stringer_append_char (c
, bitsize
);
5522 /* Treat "a" "b" as "ab". Even if we are appending zeros. */
5523 SKIP_ALL_WHITESPACE ();
5524 if (*input_line_pointer
== '"')
5528 stringer_append_char (0, bitsize
);
5530 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5531 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
5532 will emit .string with a filename in the .debug section
5533 after a sequence of constants. See the comment in
5534 emit_expr for the sequence. emit_expr will set
5535 dwarf_file_string to non-zero if this string might be a
5536 source file name. */
5537 if (strcmp (segment_name (now_seg
), ".debug") != 0)
5538 dwarf_file_string
= 0;
5539 else if (dwarf_file_string
)
5541 c
= input_line_pointer
[-1];
5542 input_line_pointer
[-1] = '\0';
5543 listing_source_file (start
);
5544 input_line_pointer
[-1] = c
;
5550 input_line_pointer
++;
5551 c
= get_single_number ();
5552 stringer_append_char (c
, bitsize
);
5553 if (*input_line_pointer
!= '>')
5555 as_bad (_("expected <nn>"));
5556 ignore_rest_of_line ();
5559 input_line_pointer
++;
5562 input_line_pointer
++;
5566 c
= *input_line_pointer
;
5569 demand_empty_rest_of_line ();
5572 /* FIXME-SOMEDAY: I had trouble here on characters with the
5573 high bits set. We'll probably also have trouble with
5574 multibyte chars, wide chars, etc. Also be careful about
5575 returning values bigger than 1 byte. xoxorich. */
5578 next_char_of_string (void)
5582 c
= *input_line_pointer
++ & CHAR_MASK
;
5586 /* PR 20902: Do not advance past the end of the buffer. */
5587 -- input_line_pointer
;
5596 as_warn (_("unterminated string; newline inserted"));
5597 bump_line_counters ();
5601 if (!TC_STRING_ESCAPES
)
5603 switch (c
= *input_line_pointer
++ & CHAR_MASK
)
5631 break; /* As itself. */
5647 for (i
= 0, number
= 0;
5648 ISDIGIT (c
) && i
< 3;
5649 c
= *input_line_pointer
++, i
++)
5651 number
= number
* 8 + c
- '0';
5654 c
= number
& CHAR_MASK
;
5656 --input_line_pointer
;
5665 c
= *input_line_pointer
++;
5666 while (ISXDIGIT (c
))
5669 number
= number
* 16 + c
- '0';
5670 else if (ISUPPER (c
))
5671 number
= number
* 16 + c
- 'A' + 10;
5673 number
= number
* 16 + c
- 'a' + 10;
5674 c
= *input_line_pointer
++;
5676 c
= number
& CHAR_MASK
;
5677 --input_line_pointer
;
5682 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
5683 as_warn (_("unterminated string; newline inserted"));
5685 bump_line_counters ();
5689 /* Do not advance past the end of the buffer. */
5690 -- input_line_pointer
;
5696 #ifdef ONLY_STANDARD_ESCAPES
5697 as_bad (_("bad escaped character in string"));
5699 #endif /* ONLY_STANDARD_ESCAPES */
5712 get_segmented_expression (expressionS
*expP
)
5716 retval
= expression (expP
);
5717 if (expP
->X_op
== O_illegal
5718 || expP
->X_op
== O_absent
5719 || expP
->X_op
== O_big
)
5721 as_bad (_("expected address expression"));
5722 expP
->X_op
= O_constant
;
5723 expP
->X_add_number
= 0;
5724 retval
= absolute_section
;
5730 get_known_segmented_expression (expressionS
*expP
)
5732 segT retval
= get_segmented_expression (expP
);
5734 if (retval
== undefined_section
)
5736 /* There is no easy way to extract the undefined symbol from the
5738 if (expP
->X_add_symbol
!= NULL
5739 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
5740 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5741 S_GET_NAME (expP
->X_add_symbol
));
5743 as_warn (_("some symbol undefined; zero assumed"));
5744 retval
= absolute_section
;
5745 expP
->X_op
= O_constant
;
5746 expP
->X_add_number
= 0;
5751 char /* Return terminator. */
5752 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
5754 /* FIXME: val_pointer should probably be offsetT *. */
5755 *val_pointer
= (long) get_absolute_expression ();
5756 return (*input_line_pointer
++);
5759 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
5760 Give a warning if that happens. */
5763 demand_copy_C_string (int *len_pointer
)
5767 if ((s
= demand_copy_string (len_pointer
)) != 0)
5771 for (len
= *len_pointer
; len
> 0; len
--)
5773 if (s
[len
- 1] == 0)
5777 as_bad (_("this string may not contain \'\\0\'"));
5786 /* Demand string, but return a safe (=private) copy of the string.
5787 Return NULL if we can't read a string here. */
5790 demand_copy_string (int *lenP
)
5798 if (*input_line_pointer
== '\"')
5800 input_line_pointer
++; /* Skip opening quote. */
5802 while (is_a_char (c
= next_char_of_string ()))
5804 obstack_1grow (¬es
, c
);
5807 /* JF this next line is so demand_copy_C_string will return a
5808 null terminated string. */
5809 obstack_1grow (¬es
, '\0');
5810 retval
= (char *) obstack_finish (¬es
);
5814 as_bad (_("missing string"));
5816 ignore_rest_of_line ();
5822 /* In: Input_line_pointer->next character.
5824 Do: Skip input_line_pointer over all whitespace.
5826 Out: 1 if input_line_pointer->end-of-line. */
5829 is_it_end_of_statement (void)
5832 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
5836 equals (char *sym_name
, int reassign
)
5841 input_line_pointer
++;
5842 if (*input_line_pointer
== '=')
5843 input_line_pointer
++;
5844 if (reassign
< 0 && *input_line_pointer
== '=')
5845 input_line_pointer
++;
5847 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
5848 input_line_pointer
++;
5851 stop
= mri_comment_field (&stopc
);
5853 assign_symbol (sym_name
, reassign
>= 0 ? !reassign
: reassign
);
5857 demand_empty_rest_of_line ();
5858 mri_comment_end (stop
, stopc
);
5862 /* .incbin -- include a file verbatim at the current location. */
5865 s_incbin (int x ATTRIBUTE_UNUSED
)
5876 #ifdef md_flush_pending_output
5877 md_flush_pending_output ();
5880 #ifdef md_cons_align
5885 filename
= demand_copy_string (& len
);
5886 if (filename
== NULL
)
5891 /* Look for optional skip and count. */
5892 if (* input_line_pointer
== ',')
5894 ++ input_line_pointer
;
5895 skip
= get_absolute_expression ();
5899 if (* input_line_pointer
== ',')
5901 ++ input_line_pointer
;
5903 count
= get_absolute_expression ();
5905 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
5911 demand_empty_rest_of_line ();
5913 /* Try opening absolute path first, then try include dirs. */
5914 binfile
= fopen (filename
, FOPEN_RB
);
5915 if (binfile
== NULL
)
5919 path
= XNEWVEC (char, (unsigned long) len
+ include_dir_maxlen
+ 5);
5921 for (i
= 0; i
< include_dir_count
; i
++)
5923 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
5925 binfile
= fopen (path
, FOPEN_RB
);
5926 if (binfile
!= NULL
)
5930 if (binfile
== NULL
)
5931 as_bad (_("file not found: %s"), filename
);
5934 path
= xstrdup (filename
);
5939 struct stat filestat
;
5941 if (fstat (fileno (binfile
), &filestat
) != 0
5942 || ! S_ISREG (filestat
.st_mode
)
5943 || S_ISDIR (filestat
.st_mode
))
5945 as_bad (_("unable to include `%s'"), path
);
5949 register_dependency (path
);
5951 /* Compute the length of the file. */
5952 if (fseek (binfile
, 0, SEEK_END
) != 0)
5954 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
5957 file_len
= ftell (binfile
);
5959 /* If a count was not specified use the remainder of the file. */
5961 count
= file_len
- skip
;
5963 if (skip
< 0 || count
< 0 || file_len
< 0 || skip
+ count
> file_len
)
5965 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5966 skip
, count
, file_len
);
5970 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
5972 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
5976 /* Allocate frag space and store file contents in it. */
5977 binfrag
= frag_more (count
);
5979 bytes
= fread (binfrag
, 1, count
, binfile
);
5981 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5982 path
, bytes
, count
);
5985 if (binfile
!= NULL
)
5990 /* .include -- include a file at this point. */
5993 s_include (int arg ATTRIBUTE_UNUSED
)
6002 filename
= demand_copy_string (&i
);
6003 if (filename
== NULL
)
6005 /* demand_copy_string has already printed an error and
6006 called ignore_rest_of_line. */
6014 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
6015 && *input_line_pointer
!= ' '
6016 && *input_line_pointer
!= '\t')
6018 obstack_1grow (¬es
, *input_line_pointer
);
6019 ++input_line_pointer
;
6023 obstack_1grow (¬es
, '\0');
6024 filename
= (char *) obstack_finish (¬es
);
6025 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
6026 ++input_line_pointer
;
6029 demand_empty_rest_of_line ();
6030 path
= XNEWVEC (char, (unsigned long) i
6031 + include_dir_maxlen
+ 5 /* slop */ );
6033 for (i
= 0; i
< include_dir_count
; i
++)
6035 strcpy (path
, include_dirs
[i
]);
6037 strcat (path
, filename
);
6038 if (0 != (try_file
= fopen (path
, FOPEN_RT
)))
6048 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
6049 register_dependency (path
);
6050 input_scrub_insert_file (path
);
6054 add_include_dir (char *path
)
6058 if (include_dir_count
== 0)
6060 include_dirs
= XNEWVEC (const char *, 2);
6061 include_dirs
[0] = "."; /* Current dir. */
6062 include_dir_count
= 2;
6066 include_dir_count
++;
6067 include_dirs
= XRESIZEVEC (const char *, include_dirs
,
6071 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
6074 if (i
> include_dir_maxlen
)
6075 include_dir_maxlen
= i
;
6078 /* Output debugging information to denote the source file. */
6081 generate_file_debug (void)
6083 if (debug_type
== DEBUG_STABS
)
6084 stabs_generate_asm_file ();
6087 /* Output line number debugging information for the current source line. */
6090 generate_lineno_debug (void)
6094 case DEBUG_UNSPECIFIED
:
6099 stabs_generate_asm_lineno ();
6102 ecoff_generate_asm_lineno ();
6105 /* ??? We could here indicate to dwarf2dbg.c that something
6106 has changed. However, since there is additional backend
6107 support that is required (calling dwarf2_emit_insn), we
6108 let dwarf2dbg.c call as_where on its own. */
6113 /* Output debugging information to mark a function entry point or end point.
6114 END_P is zero for .func, and non-zero for .endfunc. */
6119 do_s_func (end_p
, NULL
);
6122 /* Subroutine of s_func so targets can choose a different default prefix.
6123 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
6126 do_s_func (int end_p
, const char *default_prefix
)
6128 /* Record the current function so that we can issue an error message for
6129 misplaced .func,.endfunc, and also so that .endfunc needs no
6131 static char *current_name
;
6132 static char *current_label
;
6136 if (current_name
== NULL
)
6138 as_bad (_("missing .func"));
6139 ignore_rest_of_line ();
6143 if (debug_type
== DEBUG_STABS
)
6144 stabs_generate_asm_endfunc (current_name
, current_label
);
6146 current_name
= current_label
= NULL
;
6151 char delim1
, delim2
;
6153 if (current_name
!= NULL
)
6155 as_bad (_(".endfunc missing for previous .func"));
6156 ignore_rest_of_line ();
6160 delim1
= get_symbol_name (& name
);
6161 name
= xstrdup (name
);
6162 *input_line_pointer
= delim1
;
6163 SKIP_WHITESPACE_AFTER_NAME ();
6164 if (*input_line_pointer
!= ',')
6168 if (asprintf (&label
, "%s%s", default_prefix
, name
) == -1)
6169 as_fatal ("%s", xstrerror (errno
));
6173 char leading_char
= bfd_get_symbol_leading_char (stdoutput
);
6174 /* Missing entry point, use function's name with the leading
6178 if (asprintf (&label
, "%c%s", leading_char
, name
) == -1)
6179 as_fatal ("%s", xstrerror (errno
));
6187 ++input_line_pointer
;
6189 delim2
= get_symbol_name (& label
);
6190 label
= xstrdup (label
);
6191 restore_line_pointer (delim2
);
6194 if (debug_type
== DEBUG_STABS
)
6195 stabs_generate_asm_func (name
, label
);
6197 current_name
= name
;
6198 current_label
= label
;
6201 demand_empty_rest_of_line ();
6204 #ifdef HANDLE_BUNDLE
6207 s_bundle_align_mode (int arg ATTRIBUTE_UNUSED
)
6209 unsigned int align
= get_absolute_expression ();
6211 demand_empty_rest_of_line ();
6213 if (align
> (unsigned int) TC_ALIGN_LIMIT
)
6214 as_fatal (_(".bundle_align_mode alignment too large (maximum %u)"),
6215 (unsigned int) TC_ALIGN_LIMIT
);
6217 if (bundle_lock_frag
!= NULL
)
6219 as_bad (_("cannot change .bundle_align_mode inside .bundle_lock"));
6223 bundle_align_p2
= align
;
6227 s_bundle_lock (int arg ATTRIBUTE_UNUSED
)
6229 demand_empty_rest_of_line ();
6231 if (bundle_align_p2
== 0)
6233 as_bad (_(".bundle_lock is meaningless without .bundle_align_mode"));
6237 if (bundle_lock_depth
== 0)
6239 bundle_lock_frchain
= frchain_now
;
6240 bundle_lock_frag
= start_bundle ();
6242 ++bundle_lock_depth
;
6246 s_bundle_unlock (int arg ATTRIBUTE_UNUSED
)
6250 demand_empty_rest_of_line ();
6252 if (bundle_lock_frag
== NULL
)
6254 as_bad (_(".bundle_unlock without preceding .bundle_lock"));
6258 gas_assert (bundle_align_p2
> 0);
6260 gas_assert (bundle_lock_depth
> 0);
6261 if (--bundle_lock_depth
> 0)
6264 size
= pending_bundle_size (bundle_lock_frag
);
6266 if (size
> 1U << bundle_align_p2
)
6267 as_bad (_(".bundle_lock sequence is %u bytes, "
6268 "but bundle size is only %u bytes"),
6269 size
, 1u << bundle_align_p2
);
6271 finish_bundle (bundle_lock_frag
, size
);
6273 bundle_lock_frag
= NULL
;
6274 bundle_lock_frchain
= NULL
;
6277 #endif /* HANDLE_BUNDLE */
6280 s_ignore (int arg ATTRIBUTE_UNUSED
)
6282 ignore_rest_of_line ();
6286 read_print_statistics (FILE *file
)
6288 htab_print_statistics (file
, "pseudo-op table", po_hash
);
6291 /* Inserts the given line into the input stream.
6293 This call avoids macro/conditionals nesting checking, since the contents of
6294 the line are assumed to replace the contents of a line already scanned.
6296 An appropriate use of this function would be substitution of input lines when
6297 called by md_start_line_hook(). The given line is assumed to already be
6298 properly scrubbed. */
6301 input_scrub_insert_line (const char *line
)
6304 size_t len
= strlen (line
);
6305 sb_build (&newline
, len
);
6306 sb_add_buffer (&newline
, line
, len
);
6307 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
6309 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
6312 /* Insert a file into the input stream; the path must resolve to an actual
6313 file; no include path searching or dependency registering is performed. */
6316 input_scrub_insert_file (char *path
)
6318 input_scrub_include_file (path
, input_line_pointer
);
6319 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
6322 /* Find the end of a line, considering quotation and escaping of quotes. */
6324 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
6325 # define TC_SINGLE_QUOTE_STRINGS 1
6329 _find_end_of_line (char *s
, int mri_string
, int insn ATTRIBUTE_UNUSED
,
6332 char inquote
= '\0';
6335 while (!is_end_of_line
[(unsigned char) *s
]
6336 || (inquote
&& !ISCNTRL (*s
))
6337 || (inquote
== '\'' && flag_mri
)
6338 #ifdef TC_EOL_IN_INSN
6339 || (insn
&& TC_EOL_IN_INSN (s
))
6341 /* PR 6926: When we are parsing the body of a macro the sequence
6342 \@ is special - it refers to the invocation count. If the @
6343 character happens to be registered as a line-separator character
6344 by the target, then the is_end_of_line[] test above will have
6345 returned true, but we need to ignore the line separating
6346 semantics in this particular case. */
6347 || (in_macro
&& inescape
&& *s
== '@')
6350 if (mri_string
&& *s
== '\'')
6354 else if (*s
== '\\')
6358 #ifdef TC_SINGLE_QUOTE_STRINGS
6359 || (TC_SINGLE_QUOTE_STRINGS
&& *s
== '\'')
6366 as_warn (_("missing closing `%c'"), inquote
);
6367 if (inescape
&& !ignore_input ())
6368 as_warn (_("stray `\\'"));
6373 find_end_of_line (char *s
, int mri_string
)
6375 return _find_end_of_line (s
, mri_string
, 0, 0);
6378 static char *saved_ilp
= NULL
;
6379 static char *saved_limit
;
6381 /* Use BUF as a temporary input pointer for calling other functions in this
6382 file. BUF must be a C string, so that its end can be found by strlen.
6383 Also sets the buffer_limit variable (local to this file) so that buffer
6384 overruns should not occur. Saves the current input line pointer so that
6385 it can be restored by calling restore_ilp().
6387 Does not support recursion. */
6390 temp_ilp (char *buf
)
6392 gas_assert (saved_ilp
== NULL
);
6393 gas_assert (buf
!= NULL
);
6395 saved_ilp
= input_line_pointer
;
6396 saved_limit
= buffer_limit
;
6397 /* Prevent the assert in restore_ilp from triggering if
6398 the input_line_pointer has not yet been initialised. */
6399 if (saved_ilp
== NULL
)
6400 saved_limit
= saved_ilp
= (char *) "";
6402 input_line_pointer
= buf
;
6403 buffer_limit
= buf
+ strlen (buf
);
6404 input_from_string
= true;
6407 /* Restore a saved input line pointer. */
6412 gas_assert (saved_ilp
!= NULL
);
6414 input_line_pointer
= saved_ilp
;
6415 buffer_limit
= saved_limit
;
6416 input_from_string
= false;