1 /* read.c - read a source file -
2 Copyright (C) 1986-2021 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
, 12},
386 {"ds.s", s_space
, 4},
387 {"ds.w", s_space
, 2},
388 {"ds.x", s_space
, 12},
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
> (LONG_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 l
= get_absolute_expression ();
2076 else if (!get_linefile_number (&l
))
2078 ignore_rest_of_line ();
2085 /* Some of the back ends can't deal with non-positive line numbers.
2086 Besides, it's silly. GCC however will generate a line number of
2087 zero when it is pre-processing builtins for assembler-with-cpp files:
2091 We do not want to barf on this, especially since such files are used
2092 in the GCC and GDB testsuites. So we check for negative line numbers
2093 rather than non-positive line numbers. */
2094 as_warn (_("line numbers must be positive; line number %d rejected"),
2105 if (*input_line_pointer
== '"')
2106 file
= demand_copy_string (&length
);
2112 while (get_linefile_number (&this_flag
))
2115 /* From GCC's cpp documentation:
2116 1: start of a new file.
2117 2: returning to a file after having included
2119 3: following text comes from a system header file.
2120 4: following text should be treated as extern "C".
2122 4 is nonsensical for the assembler; 3, we don't
2123 care about, so we ignore it just in case a
2124 system header file is included while
2125 preprocessing assembly. So 1 and 2 are all we
2126 care about, and they are mutually incompatible.
2127 new_logical_line_flags() demands this. */
2130 if (flags
&& flags
!= (1 << this_flag
))
2131 as_warn (_("incompatible flag %i in line directive"),
2134 flags
|= 1 << this_flag
;
2139 /* We ignore these. */
2143 as_warn (_("unsupported flag %i in line directive"),
2148 if (!is_end_of_line
[(unsigned char)*input_line_pointer
])
2153 if (appline
|| file
)
2155 new_logical_line_flags (file
, l
, flags
);
2158 listing_source_line (l
);
2162 if (appline
|| file
)
2163 demand_empty_rest_of_line ();
2165 ignore_rest_of_line ();
2168 /* Handle the .end pseudo-op. Actually, the real work is done in
2169 read_a_source_file. */
2172 s_end (int ignore ATTRIBUTE_UNUSED
)
2176 /* The MRI assembler permits the start symbol to follow .end,
2177 but we don't support that. */
2179 if (!is_end_of_line
[(unsigned char) *input_line_pointer
]
2180 && *input_line_pointer
!= '*'
2181 && *input_line_pointer
!= '!')
2182 as_warn (_("start address not supported"));
2186 /* Handle the .err pseudo-op. */
2189 s_err (int ignore ATTRIBUTE_UNUSED
)
2191 as_bad (_(".err encountered"));
2192 demand_empty_rest_of_line ();
2195 /* Handle the .error and .warning pseudo-ops. */
2201 /* The purpose for the conditional assignment is not to
2202 internationalize the directive itself, but that we need a
2203 self-contained message, one that can be passed like the
2204 demand_copy_C_string return value, and with no assumption on the
2205 location of the name of the directive within the message. */
2207 = (err
? _(".error directive invoked in source file")
2208 : _(".warning directive invoked in source file"));
2210 if (!is_it_end_of_statement ())
2212 if (*input_line_pointer
!= '\"')
2214 as_bad (_("%s argument must be a string"),
2215 err
? ".error" : ".warning");
2216 ignore_rest_of_line ();
2220 msg
= demand_copy_C_string (&len
);
2228 as_warn ("%s", msg
);
2229 demand_empty_rest_of_line ();
2232 /* Handle the MRI fail pseudo-op. */
2235 s_fail (int ignore ATTRIBUTE_UNUSED
)
2242 stop
= mri_comment_field (&stopc
);
2244 temp
= get_absolute_expression ();
2246 as_warn (_(".fail %ld encountered"), (long) temp
);
2248 as_bad (_(".fail %ld encountered"), (long) temp
);
2250 demand_empty_rest_of_line ();
2253 mri_comment_end (stop
, stopc
);
2257 s_fill (int ignore ATTRIBUTE_UNUSED
)
2259 expressionS rep_exp
;
2264 #ifdef md_flush_pending_output
2265 md_flush_pending_output ();
2268 #ifdef md_cons_align
2272 expression (&rep_exp
);
2273 if (*input_line_pointer
== ',')
2275 input_line_pointer
++;
2276 size
= get_absolute_expression ();
2277 if (*input_line_pointer
== ',')
2279 input_line_pointer
++;
2280 fill
= get_absolute_expression ();
2284 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
2285 #define BSD_FILL_SIZE_CROCK_8 (8)
2286 if (size
> BSD_FILL_SIZE_CROCK_8
)
2288 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8
);
2289 size
= BSD_FILL_SIZE_CROCK_8
;
2293 as_warn (_("size negative; .fill ignored"));
2296 else if (rep_exp
.X_op
== O_constant
&& rep_exp
.X_add_number
<= 0)
2298 if (rep_exp
.X_add_number
< 0)
2299 as_warn (_("repeat < 0; .fill ignored"));
2303 if (size
&& !need_pass_2
)
2305 if (now_seg
== absolute_section
)
2307 if (rep_exp
.X_op
!= O_constant
)
2308 as_bad (_("non-constant fill count for absolute section"));
2309 else if (fill
&& rep_exp
.X_add_number
!= 0)
2310 as_bad (_("attempt to fill absolute section with non-zero value"));
2311 abs_section_offset
+= rep_exp
.X_add_number
* size
;
2314 && (rep_exp
.X_op
!= O_constant
|| rep_exp
.X_add_number
!= 0)
2316 as_bad (_("attempt to fill section `%s' with non-zero value"),
2317 segment_name (now_seg
));
2319 if (rep_exp
.X_op
== O_constant
)
2321 p
= frag_var (rs_fill
, (int) size
, (int) size
,
2322 (relax_substateT
) 0, (symbolS
*) 0,
2323 (offsetT
) rep_exp
.X_add_number
,
2328 /* We don't have a constant repeat count, so we can't use
2329 rs_fill. We can get the same results out of rs_space,
2330 but its argument is in bytes, so we must multiply the
2331 repeat count by size. */
2334 rep_sym
= make_expr_symbol (&rep_exp
);
2337 expressionS size_exp
;
2338 size_exp
.X_op
= O_constant
;
2339 size_exp
.X_add_number
= size
;
2341 rep_exp
.X_op
= O_multiply
;
2342 rep_exp
.X_add_symbol
= rep_sym
;
2343 rep_exp
.X_op_symbol
= make_expr_symbol (&size_exp
);
2344 rep_exp
.X_add_number
= 0;
2345 rep_sym
= make_expr_symbol (&rep_exp
);
2348 p
= frag_var (rs_space
, (int) size
, (int) size
,
2349 (relax_substateT
) 0, rep_sym
, (offsetT
) 0, (char *) 0);
2352 memset (p
, 0, (unsigned int) size
);
2354 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
2355 flavoured AS. The following bizarre behaviour is to be
2356 compatible with above. I guess they tried to take up to 8
2357 bytes from a 4-byte expression and they forgot to sign
2359 #define BSD_FILL_SIZE_CROCK_4 (4)
2360 md_number_to_chars (p
, (valueT
) fill
,
2361 (size
> BSD_FILL_SIZE_CROCK_4
2362 ? BSD_FILL_SIZE_CROCK_4
2364 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
2365 but emits no error message because it seems a legal thing to do.
2366 It is a degenerate case of .fill but could be emitted by a
2369 demand_empty_rest_of_line ();
2373 s_globl (int ignore ATTRIBUTE_UNUSED
)
2382 stop
= mri_comment_field (&stopc
);
2386 if ((name
= read_symbol_name ()) == NULL
)
2389 symbolP
= symbol_find_or_make (name
);
2390 S_SET_EXTERNAL (symbolP
);
2393 c
= *input_line_pointer
;
2396 input_line_pointer
++;
2398 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
2406 demand_empty_rest_of_line ();
2409 mri_comment_end (stop
, stopc
);
2412 /* Handle the MRI IRP and IRPC pseudo-ops. */
2424 file
= as_where (&line
);
2426 eol
= find_end_of_line (input_line_pointer
, 0);
2427 sb_build (&s
, eol
- input_line_pointer
);
2428 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2429 input_line_pointer
= eol
;
2433 err
= expand_irp (irpc
, 0, &s
, &out
, get_non_macro_line_sb
);
2435 as_bad_where (file
, line
, "%s", err
);
2439 input_scrub_include_sb (&out
, input_line_pointer
, 1);
2441 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2444 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2445 the section to only be linked once. However, this is not supported
2446 by most object file formats. This takes an optional argument,
2447 which is what to do about duplicates. */
2450 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
2452 enum linkonce_type type
;
2456 type
= LINKONCE_DISCARD
;
2458 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
2463 c
= get_symbol_name (& s
);
2464 if (strcasecmp (s
, "discard") == 0)
2465 type
= LINKONCE_DISCARD
;
2466 else if (strcasecmp (s
, "one_only") == 0)
2467 type
= LINKONCE_ONE_ONLY
;
2468 else if (strcasecmp (s
, "same_size") == 0)
2469 type
= LINKONCE_SAME_SIZE
;
2470 else if (strcasecmp (s
, "same_contents") == 0)
2471 type
= LINKONCE_SAME_CONTENTS
;
2473 as_warn (_("unrecognized .linkonce type `%s'"), s
);
2475 (void) restore_line_pointer (c
);
2478 #ifdef obj_handle_link_once
2479 obj_handle_link_once (type
);
2480 #else /* ! defined (obj_handle_link_once) */
2484 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
2485 as_warn (_(".linkonce is not supported for this object file format"));
2487 flags
= bfd_section_flags (now_seg
);
2488 flags
|= SEC_LINK_ONCE
;
2493 case LINKONCE_DISCARD
:
2494 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
2496 case LINKONCE_ONE_ONLY
:
2497 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
2499 case LINKONCE_SAME_SIZE
:
2500 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
2502 case LINKONCE_SAME_CONTENTS
:
2503 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
2506 if (!bfd_set_section_flags (now_seg
, flags
))
2507 as_bad (_("bfd_set_section_flags: %s"),
2508 bfd_errmsg (bfd_get_error ()));
2510 #endif /* ! defined (obj_handle_link_once) */
2512 demand_empty_rest_of_line ();
2516 bss_alloc (symbolS
*symbolP
, addressT size
, unsigned int align
)
2519 segT current_seg
= now_seg
;
2520 subsegT current_subseg
= now_subseg
;
2521 segT bss_seg
= bss_section
;
2523 #if defined (TC_MIPS) || defined (TC_ALPHA)
2524 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
2525 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
2527 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2528 if (size
<= bfd_get_gp_size (stdoutput
))
2530 bss_seg
= subseg_new (".sbss", 1);
2531 seg_info (bss_seg
)->bss
= 1;
2532 if (!bfd_set_section_flags (bss_seg
, SEC_ALLOC
| SEC_SMALL_DATA
))
2533 as_warn (_("error setting flags for \".sbss\": %s"),
2534 bfd_errmsg (bfd_get_error ()));
2538 subseg_set (bss_seg
, 1);
2540 if (align
> OCTETS_PER_BYTE_POWER
)
2542 record_alignment (bss_seg
, align
);
2543 frag_align (align
, 0, 0);
2546 /* Detach from old frag. */
2547 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2548 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2550 symbol_set_frag (symbolP
, frag_now
);
2551 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
* OCTETS_PER_BYTE
, NULL
);
2555 S_SET_SIZE (symbolP
, size
);
2557 S_SET_SEGMENT (symbolP
, bss_seg
);
2560 /* The symbol may already have been created with a preceding
2561 ".globl" directive -- be careful not to step on storage class
2562 in that case. Otherwise, set it to static. */
2563 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2564 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2565 #endif /* OBJ_COFF */
2567 subseg_set (current_seg
, current_subseg
);
2571 parse_align (int align_bytes
)
2577 if (*input_line_pointer
!= ',')
2580 as_bad (_("expected alignment after size"));
2581 ignore_rest_of_line ();
2585 input_line_pointer
++;
2588 align
= get_absolute_expr (&exp
);
2589 if (exp
.X_op
== O_absent
)
2592 if (!exp
.X_unsigned
)
2594 as_warn (_("alignment negative; 0 assumed"));
2598 if (align_bytes
&& align
!= 0)
2600 /* convert to a power of 2 alignment */
2601 unsigned int alignp2
= 0;
2602 while ((align
& 1) == 0)
2603 align
>>= 1, ++alignp2
;
2606 as_bad (_("alignment not a power of 2"));
2607 ignore_rest_of_line ();
2615 /* Called from s_comm_internal after symbol name and size have been
2616 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2617 1 if this was a ".bss" directive which has a 3rd argument
2618 (alignment as a power of 2), or 2 if this was a ".bss" directive
2619 with alignment in bytes. */
2622 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2628 align
= parse_align (needs_align
- 1);
2629 if (align
== (addressT
) -1)
2633 /* Assume some objects may require alignment on some systems. */
2634 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2636 bss_alloc (symbolP
, size
, align
);
2641 s_lcomm (int needs_align
)
2643 s_comm_internal (needs_align
, s_lcomm_internal
);
2647 s_lcomm_bytes (int needs_align
)
2649 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2653 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2659 /* We permit ANY defined expression: BSD4.2 demands constants. */
2660 if ((name
= read_symbol_name ()) == NULL
)
2663 if (*input_line_pointer
!= ',')
2665 as_bad (_("expected comma after \"%s\""), name
);
2669 input_line_pointer
++;
2670 expression_and_evaluate (&exp
);
2672 if (exp
.X_op
!= O_constant
2673 && exp
.X_op
!= O_register
)
2675 as_bad (_("bad expression"));
2679 symbolP
= symbol_find_or_make (name
);
2681 if (S_GET_SEGMENT (symbolP
) == undefined_section
)
2683 /* The name might be an undefined .global symbol; be sure to
2684 keep the "external" bit. */
2685 S_SET_SEGMENT (symbolP
,
2686 (exp
.X_op
== O_constant
2689 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2693 as_bad (_("symbol `%s' is already defined"), name
);
2696 demand_empty_rest_of_line ();
2701 ignore_rest_of_line ();
2706 /* Read a line into an sb. Returns the character that ended the line
2707 or zero if there are no more lines. */
2710 get_line_sb (sb
*line
, int in_macro
)
2714 if (input_line_pointer
[-1] == '\n')
2715 bump_line_counters ();
2717 if (input_line_pointer
>= buffer_limit
)
2719 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2720 if (buffer_limit
== 0)
2724 eol
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 0, in_macro
);
2725 sb_add_buffer (line
, input_line_pointer
, eol
- input_line_pointer
);
2726 input_line_pointer
= eol
;
2728 /* Don't skip multiple end-of-line characters, because that breaks support
2729 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2730 characters but isn't. Instead just skip one end of line character and
2731 return the character skipped so that the caller can re-insert it if
2733 return *input_line_pointer
++;
2737 get_non_macro_line_sb (sb
*line
)
2739 return get_line_sb (line
, 0);
2743 get_macro_line_sb (sb
*line
)
2745 return get_line_sb (line
, 1);
2748 /* Define a macro. This is an interface to macro.c. */
2751 s_macro (int ignore ATTRIBUTE_UNUSED
)
2760 file
= as_where (&line
);
2762 eol
= find_end_of_line (input_line_pointer
, 0);
2763 sb_build (&s
, eol
- input_line_pointer
);
2764 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2765 input_line_pointer
= eol
;
2767 if (line_label
!= NULL
)
2772 name
= S_GET_NAME (line_label
);
2773 len
= strlen (name
);
2774 sb_build (&label
, len
);
2775 sb_add_buffer (&label
, name
, len
);
2776 err
= define_macro (0, &s
, &label
, get_macro_line_sb
, file
, line
, &name
);
2780 err
= define_macro (0, &s
, NULL
, get_macro_line_sb
, file
, line
, &name
);
2782 as_bad_where (file
, line
, err
, name
);
2785 if (line_label
!= NULL
)
2787 S_SET_SEGMENT (line_label
, absolute_section
);
2788 S_SET_VALUE (line_label
, 0);
2789 symbol_set_frag (line_label
, &zero_address_frag
);
2792 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2793 && po_entry_find (po_hash
, name
) != NULL
)
2796 && po_entry_find (po_hash
, name
+ 1) != NULL
))
2797 as_warn_where (file
,
2799 _("attempt to redefine pseudo-op `%s' ignored"),
2806 /* Handle the .mexit pseudo-op, which immediately exits a macro
2810 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2814 cond_exit_macro (macro_nest
);
2815 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2818 as_warn (_("ignoring macro exit outside a macro definition."));
2821 /* Switch in and out of MRI mode. */
2824 s_mri (int ignore ATTRIBUTE_UNUSED
)
2827 #ifdef MRI_MODE_CHANGE
2831 on
= get_absolute_expression ();
2832 #ifdef MRI_MODE_CHANGE
2833 old_flag
= flag_mri
;
2852 /* Operator precedence changes in m68k MRI mode, so we need to
2853 update the operator rankings. */
2854 expr_set_precedence ();
2856 #ifdef MRI_MODE_CHANGE
2858 MRI_MODE_CHANGE (on
);
2861 demand_empty_rest_of_line ();
2864 /* Handle changing the location counter. */
2867 do_org (segT segment
, expressionS
*exp
, int fill
)
2869 if (segment
!= now_seg
2870 && segment
!= absolute_section
2871 && segment
!= expr_section
)
2872 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2874 if (now_seg
== absolute_section
)
2877 as_warn (_("ignoring fill value in absolute section"));
2878 if (exp
->X_op
!= O_constant
)
2880 as_bad (_("only constant offsets supported in absolute section"));
2881 exp
->X_add_number
= 0;
2883 abs_section_offset
= exp
->X_add_number
;
2888 symbolS
*sym
= exp
->X_add_symbol
;
2889 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2891 if (fill
&& in_bss ())
2892 as_warn (_("ignoring fill value in section `%s'"),
2893 segment_name (now_seg
));
2895 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2897 /* Handle complex expressions. */
2898 sym
= make_expr_symbol (exp
);
2902 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2908 s_org (int ignore ATTRIBUTE_UNUSED
)
2914 #ifdef md_flush_pending_output
2915 md_flush_pending_output ();
2918 /* The m68k MRI assembler has a different meaning for .org. It
2919 means to create an absolute section at a given address. We can't
2920 support that--use a linker script instead. */
2923 as_bad (_("MRI style ORG pseudo-op not supported"));
2924 ignore_rest_of_line ();
2928 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2929 thing as a sub-segment-relative origin. Any absolute origin is
2930 given a warning, then assumed to be segment-relative. Any
2931 segmented origin expression ("foo+42") had better be in the right
2932 segment or the .org is ignored.
2934 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2935 we never know sub-segment sizes when we are reading code. BSD
2936 will crash trying to emit negative numbers of filler bytes in
2937 certain .orgs. We don't crash, but see as-write for that code.
2939 Don't make frag if need_pass_2==1. */
2940 segment
= get_known_segmented_expression (&exp
);
2941 if (*input_line_pointer
== ',')
2943 input_line_pointer
++;
2944 temp_fill
= get_absolute_expression ();
2950 do_org (segment
, &exp
, temp_fill
);
2952 demand_empty_rest_of_line ();
2955 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2956 called by the obj-format routine which handles section changing
2957 when in MRI mode. It will create a new section, and return it. It
2958 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2959 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2962 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2972 name
= input_line_pointer
;
2973 if (!ISDIGIT (*name
))
2974 c
= get_symbol_name (& name
);
2979 ++input_line_pointer
;
2981 while (ISDIGIT (*input_line_pointer
));
2983 c
= *input_line_pointer
;
2984 *input_line_pointer
= '\0';
2987 name
= xstrdup (name
);
2989 c
= restore_line_pointer (c
);
2991 seg
= subseg_new (name
, 0);
2997 ++input_line_pointer
;
2998 align
= get_absolute_expression ();
2999 record_alignment (seg
, align
);
3003 if (*input_line_pointer
== ',')
3005 c
= *++input_line_pointer
;
3007 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
3010 as_bad (_("unrecognized section type"));
3011 ++input_line_pointer
;
3016 flags
= SEC_NO_FLAGS
;
3018 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
3019 else if (*type
== 'D' || *type
== 'M')
3020 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
3021 else if (*type
== 'R')
3022 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
3023 if (flags
!= SEC_NO_FLAGS
)
3025 if (!bfd_set_section_flags (seg
, flags
))
3026 as_warn (_("error setting flags for \"%s\": %s"),
3027 bfd_section_name (seg
),
3028 bfd_errmsg (bfd_get_error ()));
3033 /* Ignore the HP type. */
3034 if (*input_line_pointer
== ',')
3035 input_line_pointer
+= 2;
3037 demand_empty_rest_of_line ();
3039 #else /* ! TC_M68K */
3040 /* The MRI assembler seems to use different forms of .sect for
3041 different targets. */
3042 as_bad ("MRI mode not supported for this target");
3043 ignore_rest_of_line ();
3044 #endif /* ! TC_M68K */
3047 /* Handle the .print pseudo-op. */
3050 s_print (int ignore ATTRIBUTE_UNUSED
)
3055 s
= demand_copy_C_string (&len
);
3058 demand_empty_rest_of_line ();
3061 /* Handle the .purgem pseudo-op. */
3064 s_purgem (int ignore ATTRIBUTE_UNUSED
)
3066 if (is_it_end_of_statement ())
3068 demand_empty_rest_of_line ();
3078 c
= get_symbol_name (& name
);
3079 delete_macro (name
);
3080 *input_line_pointer
= c
;
3081 SKIP_WHITESPACE_AFTER_NAME ();
3083 while (*input_line_pointer
++ == ',');
3085 --input_line_pointer
;
3086 demand_empty_rest_of_line ();
3089 /* Handle the .endm/.endr pseudo-ops. */
3092 s_bad_end (int endr
)
3094 as_warn (_(".end%c encountered without preceding %s"),
3096 endr
? ".rept, .irp, or .irpc" : ".macro");
3097 demand_empty_rest_of_line ();
3100 /* Handle the .rept pseudo-op. */
3103 s_rept (int ignore ATTRIBUTE_UNUSED
)
3107 count
= (size_t) get_absolute_expression ();
3109 do_repeat (count
, "REPT", "ENDR");
3112 /* This function provides a generic repeat block implementation. It allows
3113 different directives to be used as the start/end keys. */
3116 do_repeat (size_t count
, const char *start
, const char *end
)
3121 if (((ssize_t
) count
) < 0)
3123 as_bad (_("negative count for %s - ignored"), start
);
3128 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
3130 as_bad (_("%s without %s"), start
, end
);
3134 sb_build (&many
, count
* one
.len
);
3136 sb_add_sb (&many
, &one
);
3140 input_scrub_include_sb (&many
, input_line_pointer
, 1);
3142 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3145 /* Like do_repeat except that any text matching EXPANDER in the
3146 block is replaced by the iteration count. */
3149 do_repeat_with_expander (size_t count
,
3152 const char * expander
)
3157 if (((ssize_t
) count
) < 0)
3159 as_bad (_("negative count for %s - ignored"), start
);
3164 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
3166 as_bad (_("%s without %s"), start
, end
);
3172 if (expander
!= NULL
&& strstr (one
.ptr
, expander
) != NULL
)
3174 while (count
-- > 0)
3180 sb_build (& processed
, one
.len
);
3181 sb_add_sb (& processed
, & one
);
3182 sub
= strstr (processed
.ptr
, expander
);
3183 len
= sprintf (sub
, "%lu", (unsigned long) count
);
3184 gas_assert (len
< 8);
3185 memmove (sub
+ len
, sub
+ 8,
3186 processed
.ptr
+ processed
.len
- (sub
+ 8));
3187 processed
.len
-= (8 - len
);
3188 sb_add_sb (& many
, & processed
);
3189 sb_kill (& processed
);
3194 sb_add_sb (&many
, &one
);
3198 input_scrub_include_sb (&many
, input_line_pointer
, 1);
3200 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3203 /* Skip to end of current repeat loop; EXTRA indicates how many additional
3204 input buffers to skip. Assumes that conditionals preceding the loop end
3205 are properly nested.
3207 This function makes it easier to implement a premature "break" out of the
3208 loop. The EXTRA arg accounts for other buffers we might have inserted,
3209 such as line substitutions. */
3212 end_repeat (int extra
)
3214 cond_exit_macro (macro_nest
);
3215 while (extra
-- >= 0)
3216 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3220 assign_symbol (char *name
, int mode
)
3224 if (name
[0] == '.' && name
[1] == '\0')
3226 /* Turn '. = mumble' into a .org mumble. */
3230 segment
= get_known_segmented_expression (&exp
);
3233 do_org (segment
, &exp
, 0);
3238 if ((symbolP
= symbol_find (name
)) == NULL
3239 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
3241 symbolP
= symbol_find_or_make (name
);
3243 /* When doing symbol listings, play games with dummy fragments living
3244 outside the normal fragment chain to record the file and line info
3246 if (listing
& LISTING_SYMBOLS
)
3248 extern struct list_info_struct
*listing_tail
;
3249 fragS
*dummy_frag
= XCNEW (fragS
);
3250 dummy_frag
->line
= listing_tail
;
3251 dummy_frag
->fr_symbol
= symbolP
;
3252 symbol_set_frag (symbolP
, dummy_frag
);
3255 #if defined (OBJ_COFF) && !defined (TE_PE)
3256 /* "set" symbols are local unless otherwise specified. */
3257 SF_SET_LOCAL (symbolP
);
3261 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3263 if ((mode
!= 0 || !S_IS_VOLATILE (symbolP
))
3264 && !S_CAN_BE_REDEFINED (symbolP
))
3266 as_bad (_("symbol `%s' is already defined"), name
);
3267 ignore_rest_of_line ();
3268 input_line_pointer
--;
3271 /* If the symbol is volatile, copy the symbol and replace the
3272 original with the copy, so that previous uses of the symbol will
3273 retain the value of the symbol at the point of use. */
3274 else if (S_IS_VOLATILE (symbolP
))
3275 symbolP
= symbol_clone (symbolP
, 1);
3279 S_SET_VOLATILE (symbolP
);
3281 S_SET_FORWARD_REF (symbolP
);
3283 pseudo_set (symbolP
);
3286 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3287 then this is .equiv, and it is an error if the symbol is already
3288 defined. If EQUIV is -1, the symbol additionally is a forward
3296 /* Especial apologies for the random logic:
3297 this just grew, and could be parsed much more simply!
3299 if ((name
= read_symbol_name ()) == NULL
)
3302 if (*input_line_pointer
!= ',')
3304 as_bad (_("expected comma after \"%s\""), name
);
3305 ignore_rest_of_line ();
3310 input_line_pointer
++;
3311 assign_symbol (name
, equiv
);
3312 demand_empty_rest_of_line ();
3326 #ifdef md_flush_pending_output
3327 md_flush_pending_output ();
3330 #ifdef md_cons_align
3335 stop
= mri_comment_field (&stopc
);
3337 /* In m68k MRI mode, we need to align to a word boundary, unless
3339 if (flag_m68k_mri
&& mult
> 1)
3341 if (now_seg
== absolute_section
)
3343 abs_section_offset
+= abs_section_offset
& 1;
3344 if (line_label
!= NULL
)
3345 S_SET_VALUE (line_label
, abs_section_offset
);
3347 else if (mri_common_symbol
!= NULL
)
3351 mri_val
= S_GET_VALUE (mri_common_symbol
);
3352 if ((mri_val
& 1) != 0)
3354 S_SET_VALUE (mri_common_symbol
, mri_val
+ 1);
3355 if (line_label
!= NULL
)
3357 expressionS
*symexp
;
3359 symexp
= symbol_get_value_expression (line_label
);
3360 know (symexp
->X_op
== O_symbol
);
3361 know (symexp
->X_add_symbol
== mri_common_symbol
);
3362 symexp
->X_add_number
+= 1;
3368 do_align (1, (char *) NULL
, 0, 0);
3369 if (line_label
!= NULL
)
3371 symbol_set_frag (line_label
, frag_now
);
3372 S_SET_VALUE (line_label
, frag_now_fix ());
3382 if (*input_line_pointer
== ',')
3384 ++input_line_pointer
;
3389 val
.X_op
= O_constant
;
3390 val
.X_add_number
= 0;
3393 if ((val
.X_op
!= O_constant
3394 || val
.X_add_number
< - 0x80
3395 || val
.X_add_number
> 0xff
3396 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
3397 && (now_seg
!= absolute_section
&& !in_bss ()))
3399 resolve_expression (&exp
);
3400 if (exp
.X_op
!= O_constant
)
3401 as_bad (_("unsupported variable size or fill value"));
3406 /* PR 20901: Check for excessive values.
3407 FIXME: 1<<10 is an arbitrary limit. Maybe use maxpagesize instead ? */
3408 if (exp
.X_add_number
< 0 || exp
.X_add_number
> (1 << 10))
3409 as_bad (_("size value for space directive too large: %lx"),
3410 (long) exp
.X_add_number
);
3415 bytes
= mult
* exp
.X_add_number
;
3417 for (i
= 0; i
< exp
.X_add_number
; i
++)
3418 emit_expr (&val
, mult
);
3424 if (now_seg
== absolute_section
|| mri_common_symbol
!= NULL
)
3425 resolve_expression (&exp
);
3427 if (exp
.X_op
== O_constant
)
3431 repeat
= exp
.X_add_number
;
3438 as_warn (_(".space repeat count is zero, ignored"));
3439 else if (repeat
< 0)
3440 as_warn (_(".space repeat count is negative, ignored"));
3444 /* If we are in the absolute section, just bump the offset. */
3445 if (now_seg
== absolute_section
)
3447 if (val
.X_op
!= O_constant
|| val
.X_add_number
!= 0)
3448 as_warn (_("ignoring fill value in absolute section"));
3449 abs_section_offset
+= repeat
;
3453 /* If we are secretly in an MRI common section, then
3454 creating space just increases the size of the common
3456 if (mri_common_symbol
!= NULL
)
3458 S_SET_VALUE (mri_common_symbol
,
3459 S_GET_VALUE (mri_common_symbol
) + repeat
);
3464 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
3465 (offsetT
) repeat
, (char *) 0);
3469 if (now_seg
== absolute_section
)
3471 as_bad (_("space allocation too complex in absolute section"));
3472 subseg_set (text_section
, 0);
3475 if (mri_common_symbol
!= NULL
)
3477 as_bad (_("space allocation too complex in common section"));
3478 mri_common_symbol
= NULL
;
3482 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
3483 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
3486 if ((val
.X_op
!= O_constant
|| val
.X_add_number
!= 0) && in_bss ())
3487 as_warn (_("ignoring fill value in section `%s'"),
3488 segment_name (now_seg
));
3490 *p
= val
.X_add_number
;
3495 /* In MRI mode, after an odd number of bytes, we must align to an
3496 even word boundary, unless the next instruction is a dc.b, ds.b
3498 if (flag_mri
&& (bytes
& 1) != 0)
3499 mri_pending_align
= 1;
3501 demand_empty_rest_of_line ();
3504 mri_comment_end (stop
, stopc
);
3508 s_nop (int ignore ATTRIBUTE_UNUSED
)
3515 #ifdef md_flush_pending_output
3516 md_flush_pending_output ();
3519 #ifdef md_cons_align
3525 demand_empty_rest_of_line ();
3528 start_off
= frag_now_fix ();
3531 #ifdef md_emit_single_noop
3532 md_emit_single_noop
;
3536 #ifndef md_single_noop_insn
3537 #define md_single_noop_insn "nop"
3539 /* md_assemble might modify its argument, so
3540 we must pass it a string that is writable. */
3541 if (asprintf (&nop
, "%s", md_single_noop_insn
) < 0)
3542 as_fatal ("%s", xstrerror (errno
));
3544 /* Some targets assume that they can update input_line_pointer
3545 inside md_assemble, and, worse, that they can leave it
3546 assigned to the string pointer that was provided as an
3547 argument. So preserve ilp here. */
3548 char *saved_ilp
= input_line_pointer
;
3550 input_line_pointer
= saved_ilp
;
3553 #ifdef md_flush_pending_output
3554 md_flush_pending_output ();
3556 } while (exp
.X_op
== O_constant
3557 && exp
.X_add_number
> 0
3558 && frag_offset_ignore_align_p (start
, frag_now
, &frag_off
)
3559 && frag_off
+ frag_now_fix () < start_off
+ exp
.X_add_number
);
3563 s_nops (int ignore ATTRIBUTE_UNUSED
)
3568 #ifdef md_flush_pending_output
3569 md_flush_pending_output ();
3572 #ifdef md_cons_align
3578 /* Note - this expression is tested for an absolute value in
3579 write.c:relax_segment(). */
3582 if (*input_line_pointer
== ',')
3584 ++input_line_pointer
;
3589 val
.X_op
= O_constant
;
3590 val
.X_add_number
= 0;
3593 if (val
.X_op
!= O_constant
)
3595 as_bad (_("unsupported variable nop control in .nops directive"));
3596 val
.X_op
= O_constant
;
3597 val
.X_add_number
= 0;
3599 else if (val
.X_add_number
< 0)
3601 as_warn (_("negative nop control byte, ignored"));
3602 val
.X_add_number
= 0;
3605 demand_empty_rest_of_line ();
3608 /* Ignore this directive if we are going to perform a second pass. */
3611 /* Store the no-op instruction control byte in the first byte of frag. */
3613 symbolS
*sym
= make_expr_symbol (&exp
);
3614 p
= frag_var (rs_space_nop
, 1, 1, (relax_substateT
) 0,
3615 sym
, (offsetT
) 0, (char *) 0);
3616 *p
= val
.X_add_number
;
3620 parse_one_float (int float_type
, char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
])
3626 /* Skip any 0{letter} that may be present. Don't even check if the
3627 letter is legal. Someone may invent a "z" format and this routine
3628 has no use for such information. Lusers beware: you get
3629 diagnostics if your input is ill-conditioned. */
3630 if (input_line_pointer
[0] == '0'
3631 && ISALPHA (input_line_pointer
[1]))
3632 input_line_pointer
+= 2;
3634 /* Accept :xxxx, where the x's are hex digits, for a floating point
3635 with the exact digits specified. */
3636 if (input_line_pointer
[0] == ':')
3638 ++input_line_pointer
;
3639 length
= hex_float (float_type
, temp
);
3642 ignore_rest_of_line ();
3650 err
= md_atof (float_type
, temp
, &length
);
3651 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3652 know (err
!= NULL
|| length
> 0);
3655 as_bad (_("bad floating literal: %s"), err
);
3656 ignore_rest_of_line ();
3664 /* This is like s_space, but the value is a floating point number with
3665 the given precision. This is for the MRI dcb.s pseudo-op and
3669 s_float_space (int float_type
)
3673 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
3677 #ifdef md_cons_align
3682 stop
= mri_comment_field (&stopc
);
3684 count
= get_absolute_expression ();
3687 if (*input_line_pointer
!= ',')
3689 as_bad (_("missing value"));
3690 ignore_rest_of_line ();
3692 mri_comment_end (stop
, stopc
);
3696 ++input_line_pointer
;
3698 flen
= parse_one_float (float_type
, temp
);
3702 mri_comment_end (stop
, stopc
);
3706 while (--count
>= 0)
3710 p
= frag_more (flen
);
3711 memcpy (p
, temp
, (unsigned int) flen
);
3714 demand_empty_rest_of_line ();
3717 mri_comment_end (stop
, stopc
);
3720 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3723 s_struct (int ignore ATTRIBUTE_UNUSED
)
3729 stop
= mri_comment_field (&stopc
);
3730 abs_section_offset
= get_absolute_expression ();
3731 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3732 /* The ELF backend needs to know that we are changing sections, so
3733 that .previous works correctly. */
3735 obj_elf_section_change_hook ();
3737 subseg_set (absolute_section
, 0);
3738 demand_empty_rest_of_line ();
3740 mri_comment_end (stop
, stopc
);
3744 s_text (int ignore ATTRIBUTE_UNUSED
)
3748 temp
= get_absolute_expression ();
3749 subseg_set (text_section
, (subsegT
) temp
);
3750 demand_empty_rest_of_line ();
3753 /* .weakref x, y sets x as an alias to y that, as long as y is not
3754 referenced directly, will cause y to become a weak symbol. */
3756 s_weakref (int ignore ATTRIBUTE_UNUSED
)
3763 if ((name
= read_symbol_name ()) == NULL
)
3766 symbolP
= symbol_find_or_make (name
);
3768 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3770 if (!S_IS_VOLATILE (symbolP
))
3772 as_bad (_("symbol `%s' is already defined"), name
);
3775 symbolP
= symbol_clone (symbolP
, 1);
3776 S_CLEAR_VOLATILE (symbolP
);
3781 if (*input_line_pointer
!= ',')
3783 as_bad (_("expected comma after \"%s\""), name
);
3787 input_line_pointer
++;
3792 if ((name
= read_symbol_name ()) == NULL
)
3795 if ((symbolP2
= symbol_find_noref (name
, 1)) == NULL
3796 && (symbolP2
= md_undefined_symbol (name
)) == NULL
)
3798 symbolP2
= symbol_find_or_make (name
);
3799 S_SET_WEAKREFD (symbolP2
);
3803 symbolS
*symp
= symbolP2
;
3805 while (S_IS_WEAKREFR (symp
) && symp
!= symbolP
)
3807 expressionS
*expP
= symbol_get_value_expression (symp
);
3809 gas_assert (expP
->X_op
== O_symbol
3810 && expP
->X_add_number
== 0);
3811 symp
= expP
->X_add_symbol
;
3813 if (symp
== symbolP
)
3817 loop
= concat (S_GET_NAME (symbolP
),
3818 " => ", S_GET_NAME (symbolP2
), (const char *) NULL
);
3821 while (symp
!= symbolP
)
3823 char *old_loop
= loop
;
3825 symp
= symbol_get_value_expression (symp
)->X_add_symbol
;
3826 loop
= concat (loop
, " => ", S_GET_NAME (symp
),
3827 (const char *) NULL
);
3831 as_bad (_("%s: would close weakref loop: %s"),
3832 S_GET_NAME (symbolP
), loop
);
3836 ignore_rest_of_line ();
3840 /* Short-circuiting instead of just checking here might speed
3841 things up a tiny little bit, but loop error messages would
3842 miss intermediate links. */
3843 /* symbolP2 = symp; */
3846 memset (&exp
, 0, sizeof (exp
));
3847 exp
.X_op
= O_symbol
;
3848 exp
.X_add_symbol
= symbolP2
;
3850 S_SET_SEGMENT (symbolP
, undefined_section
);
3851 symbol_set_value_expression (symbolP
, &exp
);
3852 symbol_set_frag (symbolP
, &zero_address_frag
);
3853 S_SET_WEAKREFR (symbolP
);
3855 demand_empty_rest_of_line ();
3860 ignore_rest_of_line ();
3866 /* Verify that we are at the end of a line. If not, issue an error and
3870 demand_empty_rest_of_line (void)
3873 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3874 input_line_pointer
++;
3877 if (ISPRINT (*input_line_pointer
))
3878 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3879 *input_line_pointer
);
3881 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3882 *input_line_pointer
);
3883 ignore_rest_of_line ();
3886 /* Return pointing just after end-of-line. */
3887 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3890 /* Silently advance to the end of line. Use this after already having
3891 issued an error about something bad. */
3894 ignore_rest_of_line (void)
3896 while (input_line_pointer
< buffer_limit
3897 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3898 input_line_pointer
++;
3900 input_line_pointer
++;
3902 /* Return pointing just after end-of-line. */
3903 if (input_line_pointer
<= buffer_limit
)
3904 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3907 /* Sets frag for given symbol to zero_address_frag, except when the
3908 symbol frag is already set to a dummy listing frag. */
3911 set_zero_frag (symbolS
*symbolP
)
3913 if (symbol_get_frag (symbolP
)->fr_type
!= rs_dummy
)
3914 symbol_set_frag (symbolP
, &zero_address_frag
);
3917 /* In: Pointer to a symbol.
3918 Input_line_pointer->expression.
3920 Out: Input_line_pointer->just after any whitespace after expression.
3921 Tried to set symbol to value of expression.
3922 Will change symbols type, value, and frag; */
3925 pseudo_set (symbolS
*symbolP
)
3930 know (symbolP
); /* NULL pointer is logic error. */
3932 if (!S_IS_FORWARD_REF (symbolP
))
3933 (void) expression (&exp
);
3935 (void) deferred_expression (&exp
);
3937 if (exp
.X_op
== O_illegal
)
3938 as_bad (_("illegal expression"));
3939 else if (exp
.X_op
== O_absent
)
3940 as_bad (_("missing expression"));
3941 else if (exp
.X_op
== O_big
)
3943 if (exp
.X_add_number
> 0)
3944 as_bad (_("bignum invalid"));
3946 as_bad (_("floating point number invalid"));
3948 else if (exp
.X_op
== O_subtract
3949 && !S_IS_FORWARD_REF (symbolP
)
3950 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
3951 && (symbol_get_frag (exp
.X_add_symbol
)
3952 == symbol_get_frag (exp
.X_op_symbol
)))
3954 exp
.X_op
= O_constant
;
3955 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
3956 - S_GET_VALUE (exp
.X_op_symbol
));
3959 if (symbol_section_p (symbolP
))
3961 as_bad ("attempt to set value of section symbol");
3970 exp
.X_add_number
= 0;
3973 S_SET_SEGMENT (symbolP
, absolute_section
);
3974 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3975 set_zero_frag (symbolP
);
3979 #ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
3980 if (S_IS_EXTERNAL (symbolP
))
3982 as_bad ("can't equate global symbol `%s' with register name",
3983 S_GET_NAME (symbolP
));
3987 S_SET_SEGMENT (symbolP
, reg_section
);
3988 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3989 set_zero_frag (symbolP
);
3990 symbol_get_value_expression (symbolP
)->X_op
= O_register
;
3994 seg
= S_GET_SEGMENT (exp
.X_add_symbol
);
3995 /* For x=undef+const, create an expression symbol.
3996 For x=x+const, just update x except when x is an undefined symbol
3997 For x=defined+const, evaluate x. */
3998 if (symbolP
== exp
.X_add_symbol
3999 && (seg
!= undefined_section
4000 || !symbol_constant_p (symbolP
)))
4002 *symbol_X_add_number (symbolP
) += exp
.X_add_number
;
4005 else if (!S_IS_FORWARD_REF (symbolP
) && seg
!= undefined_section
)
4007 symbolS
*s
= exp
.X_add_symbol
;
4009 if (S_IS_COMMON (s
))
4010 as_bad (_("`%s' can't be equated to common symbol `%s'"),
4011 S_GET_NAME (symbolP
), S_GET_NAME (s
));
4013 S_SET_SEGMENT (symbolP
, seg
);
4014 S_SET_VALUE (symbolP
, exp
.X_add_number
+ S_GET_VALUE (s
));
4015 symbol_set_frag (symbolP
, symbol_get_frag (s
));
4016 copy_symbol_attributes (symbolP
, s
);
4019 S_SET_SEGMENT (symbolP
, undefined_section
);
4020 symbol_set_value_expression (symbolP
, &exp
);
4021 copy_symbol_attributes (symbolP
, exp
.X_add_symbol
);
4022 set_zero_frag (symbolP
);
4026 /* The value is some complex expression. */
4027 S_SET_SEGMENT (symbolP
, expr_section
);
4028 symbol_set_value_expression (symbolP
, &exp
);
4029 set_zero_frag (symbolP
);
4036 CONStruct more frag of .bytes, or .words etc.
4037 Should need_pass_2 be 1 then emit no frag(s).
4038 This understands EXPRESSIONS.
4042 This has a split personality. We use expression() to read the
4043 value. We can detect if the value won't fit in a byte or word.
4044 But we can't detect if expression() discarded significant digits
4045 in the case of a long. Not worth the crocks required to fix it. */
4047 /* Select a parser for cons expressions. */
4049 /* Some targets need to parse the expression in various fancy ways.
4050 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
4051 (for example, the HPPA does this). Otherwise, you can define
4052 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
4053 are defined, which is the normal case, then only simple expressions
4058 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
4061 #ifndef TC_PARSE_CONS_EXPRESSION
4062 #ifdef REPEAT_CONS_EXPRESSIONS
4063 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
4064 (parse_repeat_cons (EXP, NBYTES), TC_PARSE_CONS_RETURN_NONE)
4066 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
4069 /* If we haven't gotten one yet, just call expression. */
4070 #ifndef TC_PARSE_CONS_EXPRESSION
4071 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
4072 (expression (EXP), TC_PARSE_CONS_RETURN_NONE)
4077 do_parse_cons_expression (expressionS
*exp
,
4078 int nbytes ATTRIBUTE_UNUSED
)
4080 (void) TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
4084 /* Worker to do .byte etc statements.
4085 Clobbers input_line_pointer and checks end-of-line. */
4088 cons_worker (int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
4096 #ifdef md_flush_pending_output
4097 md_flush_pending_output ();
4101 stop
= mri_comment_field (&stopc
);
4103 if (is_it_end_of_statement ())
4105 demand_empty_rest_of_line ();
4107 mri_comment_end (stop
, stopc
);
4112 nbytes
= TC_ADDRESS_BYTES ();
4114 #ifdef md_cons_align
4115 md_cons_align (nbytes
);
4121 TC_PARSE_CONS_RETURN_TYPE ret
= TC_PARSE_CONS_RETURN_NONE
;
4122 #ifdef TC_CONS_FIX_CHECK
4123 fixS
**cur_fix
= &frchain_now
->fix_tail
;
4125 if (*cur_fix
!= NULL
)
4126 cur_fix
= &(*cur_fix
)->fx_next
;
4131 parse_mri_cons (&exp
, (unsigned int) nbytes
);
4136 if (*input_line_pointer
== '"')
4138 as_bad (_("unexpected `\"' in expression"));
4139 ignore_rest_of_line ();
4143 ret
= TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
4148 if (exp
.X_op
== O_symbol
)
4149 exp
.X_op
= O_symbol_rva
;
4151 as_fatal (_("rva without symbol"));
4153 emit_expr_with_reloc (&exp
, (unsigned int) nbytes
, ret
);
4154 #ifdef TC_CONS_FIX_CHECK
4155 TC_CONS_FIX_CHECK (&exp
, nbytes
, *cur_fix
);
4159 while (*input_line_pointer
++ == ',');
4161 /* In MRI mode, after an odd number of bytes, we must align to an
4162 even word boundary, unless the next instruction is a dc.b, ds.b
4164 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
4165 mri_pending_align
= 1;
4167 input_line_pointer
--; /* Put terminator back into stream. */
4169 demand_empty_rest_of_line ();
4172 mri_comment_end (stop
, stopc
);
4178 cons_worker (size
, 0);
4184 cons_worker (size
, 1);
4187 /* .reloc offset, reloc_name, symbol+addend. */
4190 s_reloc (int ignore ATTRIBUTE_UNUSED
)
4197 struct reloc_list
*reloc
;
4198 struct _bfd_rel
{ const char * name
; bfd_reloc_code_real_type code
; };
4199 static struct _bfd_rel bfd_relocs
[] =
4201 { "NONE", BFD_RELOC_NONE
},
4202 { "8", BFD_RELOC_8
},
4203 { "16", BFD_RELOC_16
},
4204 { "32", BFD_RELOC_32
},
4205 { "64", BFD_RELOC_64
}
4208 reloc
= XNEW (struct reloc_list
);
4211 stop
= mri_comment_field (&stopc
);
4220 as_bad (_("missing or bad offset expression"));
4223 exp
.X_add_symbol
= section_symbol (now_seg
);
4224 /* Mark the section symbol used in relocation so that it will be
4225 included in the symbol table. */
4226 symbol_mark_used_in_reloc (exp
.X_add_symbol
);
4227 exp
.X_op
= O_symbol
;
4230 if (exp
.X_add_number
== 0)
4232 reloc
->u
.a
.offset_sym
= exp
.X_add_symbol
;
4237 reloc
->u
.a
.offset_sym
= make_expr_symbol (&exp
);
4242 if (*input_line_pointer
!= ',')
4244 as_bad (_("missing reloc type"));
4248 ++input_line_pointer
;
4250 c
= get_symbol_name (& r_name
);
4251 if (strncasecmp (r_name
, "BFD_RELOC_", 10) == 0)
4255 for (reloc
->u
.a
.howto
= NULL
, i
= 0; i
< ARRAY_SIZE (bfd_relocs
); i
++)
4256 if (strcasecmp (r_name
+ 10, bfd_relocs
[i
].name
) == 0)
4258 reloc
->u
.a
.howto
= bfd_reloc_type_lookup (stdoutput
,
4259 bfd_relocs
[i
].code
);
4264 reloc
->u
.a
.howto
= bfd_reloc_name_lookup (stdoutput
, r_name
);
4265 *input_line_pointer
= c
;
4266 if (reloc
->u
.a
.howto
== NULL
)
4268 as_bad (_("unrecognized reloc type"));
4272 exp
.X_op
= O_absent
;
4273 SKIP_WHITESPACE_AFTER_NAME ();
4274 if (*input_line_pointer
== ',')
4276 ++input_line_pointer
;
4284 as_bad (_("bad reloc expression"));
4286 ignore_rest_of_line ();
4289 mri_comment_end (stop
, stopc
);
4292 reloc
->u
.a
.sym
= NULL
;
4293 reloc
->u
.a
.addend
= 0;
4296 reloc
->u
.a
.sym
= NULL
;
4297 reloc
->u
.a
.addend
= exp
.X_add_number
;
4300 reloc
->u
.a
.sym
= exp
.X_add_symbol
;
4301 reloc
->u
.a
.addend
= exp
.X_add_number
;
4304 reloc
->u
.a
.sym
= make_expr_symbol (&exp
);
4305 reloc
->u
.a
.addend
= 0;
4309 reloc
->file
= as_where (&reloc
->line
);
4310 reloc
->next
= reloc_list
;
4313 demand_empty_rest_of_line ();
4315 mri_comment_end (stop
, stopc
);
4318 /* Put the contents of expression EXP into the object file using
4319 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
4322 emit_expr (expressionS
*exp
, unsigned int nbytes
)
4324 emit_expr_with_reloc (exp
, nbytes
, TC_PARSE_CONS_RETURN_NONE
);
4328 emit_expr_with_reloc (expressionS
*exp
,
4329 unsigned int nbytes
,
4330 TC_PARSE_CONS_RETURN_TYPE reloc
)
4334 valueT extra_digit
= 0;
4336 /* Don't do anything if we are going to make another pass. */
4341 dot_value
= frag_now_fix ();
4342 dot_frag
= frag_now
;
4346 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
4347 appear as a four byte positive constant in the .line section,
4348 followed by a 2 byte 0xffff. Look for that case here. */
4350 static int dwarf_line
= -1;
4352 if (strcmp (segment_name (now_seg
), ".line") != 0)
4354 else if (dwarf_line
>= 0
4356 && exp
->X_op
== O_constant
4357 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
4358 listing_source_line ((unsigned int) dwarf_line
);
4359 else if (nbytes
== 4
4360 && exp
->X_op
== O_constant
4361 && exp
->X_add_number
>= 0)
4362 dwarf_line
= exp
->X_add_number
;
4367 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
4368 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
4369 AT_sibling (0x12) followed by a four byte address of the sibling
4370 followed by a 2 byte AT_name (0x38) followed by the name of the
4371 file. We look for that case here. */
4373 static int dwarf_file
= 0;
4375 if (strcmp (segment_name (now_seg
), ".debug") != 0)
4377 else if (dwarf_file
== 0
4379 && exp
->X_op
== O_constant
4380 && exp
->X_add_number
== 0x11)
4382 else if (dwarf_file
== 1
4384 && exp
->X_op
== O_constant
4385 && exp
->X_add_number
== 0x12)
4387 else if (dwarf_file
== 2
4390 else if (dwarf_file
== 3
4392 && exp
->X_op
== O_constant
4393 && exp
->X_add_number
== 0x38)
4398 /* The variable dwarf_file_string tells stringer that the string
4399 may be the name of the source file. */
4400 if (dwarf_file
== 4)
4401 dwarf_file_string
= 1;
4403 dwarf_file_string
= 0;
4408 if (check_eh_frame (exp
, &nbytes
))
4413 /* Handle a negative bignum. */
4415 && exp
->X_add_number
== 0
4416 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
4417 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
4420 unsigned long carry
;
4422 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
4424 /* Negate the bignum: one's complement each digit and add 1. */
4426 for (i
= 0; i
< exp
->X_add_number
; i
++)
4430 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
4433 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
4434 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
4437 /* We can ignore any carry out, because it will be handled by
4438 extra_digit if it is needed. */
4440 extra_digit
= (valueT
) -1;
4444 if (op
== O_absent
|| op
== O_illegal
)
4446 as_warn (_("zero assumed for missing expression"));
4447 exp
->X_add_number
= 0;
4450 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4452 as_bad (_("floating point number invalid"));
4453 exp
->X_add_number
= 0;
4456 else if (op
== O_register
)
4458 as_warn (_("register value used as expression"));
4462 /* Allow `.word 0' in the absolute section. */
4463 if (now_seg
== absolute_section
)
4465 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
4466 as_bad (_("attempt to store value in absolute section"));
4467 abs_section_offset
+= nbytes
;
4471 /* Allow `.word 0' in BSS style sections. */
4472 if ((op
!= O_constant
|| exp
->X_add_number
!= 0) && in_bss ())
4473 as_bad (_("attempt to store non-zero value in section `%s'"),
4474 segment_name (now_seg
));
4476 p
= frag_more ((int) nbytes
);
4478 if (reloc
!= TC_PARSE_CONS_RETURN_NONE
)
4480 emit_expr_fix (exp
, nbytes
, frag_now
, p
, reloc
);
4484 #ifndef WORKING_DOT_WORD
4485 /* If we have the difference of two symbols in a word, save it on
4486 the broken_words list. See the code in write.c. */
4487 if (op
== O_subtract
&& nbytes
== 2)
4489 struct broken_word
*x
;
4491 x
= XNEW (struct broken_word
);
4492 x
->next_broken_word
= broken_words
;
4495 x
->subseg
= now_subseg
;
4497 x
->word_goes_here
= p
;
4499 x
->add
= exp
->X_add_symbol
;
4500 x
->sub
= exp
->X_op_symbol
;
4501 x
->addnum
= exp
->X_add_number
;
4509 /* If we have an integer, but the number of bytes is too large to
4510 pass to md_number_to_chars, handle it as a bignum. */
4511 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
4513 extra_digit
= exp
->X_unsigned
? 0 : -1;
4514 convert_to_bignum (exp
, !exp
->X_unsigned
);
4518 if (op
== O_constant
)
4525 /* JF << of >= number of bits in the object is undefined. In
4526 particular SPARC (Sun 4) has problems. */
4527 if (nbytes
>= sizeof (valueT
))
4529 know (nbytes
== sizeof (valueT
));
4534 /* Don't store these bits. */
4535 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
4538 unmask
= ~mask
; /* Do store these bits. */
4541 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
4542 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
4545 get
= exp
->X_add_number
;
4547 if ((get
& mask
) != 0 && (-get
& mask
) != 0)
4549 /* Leading bits contain both 0s & 1s. */
4550 as_warn (_("value 0x%" BFD_VMA_FMT
"x truncated to 0x%" BFD_VMA_FMT
"x"),
4553 /* Put bytes in right order. */
4554 md_number_to_chars (p
, use
, (int) nbytes
);
4556 else if (op
== O_big
)
4559 LITTLENUM_TYPE
*nums
;
4561 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
4564 int i
= nbytes
/ CHARS_PER_LITTLENUM
;
4568 LITTLENUM_TYPE sign
= 0;
4569 if ((generic_bignum
[--i
]
4570 & (1 << (LITTLENUM_NUMBER_OF_BITS
- 1))) != 0)
4571 sign
= ~(LITTLENUM_TYPE
) 0;
4573 while (++i
< exp
->X_add_number
)
4574 if (generic_bignum
[i
] != sign
)
4577 else if (nbytes
== 1)
4579 /* We have nbytes == 1 and CHARS_PER_LITTLENUM == 2 (probably).
4580 Check that bits 8.. of generic_bignum[0] match bit 7
4581 and that they match all of generic_bignum[1..exp->X_add_number]. */
4582 LITTLENUM_TYPE sign
= (generic_bignum
[0] & (1 << 7)) ? -1 : 0;
4583 LITTLENUM_TYPE himask
= LITTLENUM_MASK
& ~ 0xFF;
4585 if ((generic_bignum
[0] & himask
) == (sign
& himask
))
4587 while (++i
< exp
->X_add_number
)
4588 if (generic_bignum
[i
] != sign
)
4593 if (i
< exp
->X_add_number
)
4594 as_warn (ngettext ("bignum truncated to %d byte",
4595 "bignum truncated to %d bytes",
4603 md_number_to_chars (p
, (valueT
) generic_bignum
[0], 1);
4606 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
4608 if (target_big_endian
)
4610 while (nbytes
> size
)
4612 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4613 nbytes
-= CHARS_PER_LITTLENUM
;
4614 p
+= CHARS_PER_LITTLENUM
;
4617 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
4618 while (size
>= CHARS_PER_LITTLENUM
)
4621 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4622 size
-= CHARS_PER_LITTLENUM
;
4623 p
+= CHARS_PER_LITTLENUM
;
4628 nums
= generic_bignum
;
4629 while (size
>= CHARS_PER_LITTLENUM
)
4631 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4633 size
-= CHARS_PER_LITTLENUM
;
4634 p
+= CHARS_PER_LITTLENUM
;
4635 nbytes
-= CHARS_PER_LITTLENUM
;
4638 while (nbytes
>= CHARS_PER_LITTLENUM
)
4640 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4641 nbytes
-= CHARS_PER_LITTLENUM
;
4642 p
+= CHARS_PER_LITTLENUM
;
4647 emit_expr_fix (exp
, nbytes
, frag_now
, p
, TC_PARSE_CONS_RETURN_NONE
);
4651 emit_expr_fix (expressionS
*exp
, unsigned int nbytes
, fragS
*frag
, char *p
,
4652 TC_PARSE_CONS_RETURN_TYPE r ATTRIBUTE_UNUSED
)
4655 unsigned int size
= nbytes
;
4657 memset (p
, 0, size
);
4659 /* Generate a fixS to record the symbol value. */
4661 #ifdef TC_CONS_FIX_NEW
4662 TC_CONS_FIX_NEW (frag
, p
- frag
->fr_literal
+ offset
, size
, exp
, r
);
4664 if (r
!= TC_PARSE_CONS_RETURN_NONE
)
4666 reloc_howto_type
*reloc_howto
;
4668 reloc_howto
= bfd_reloc_type_lookup (stdoutput
, r
);
4669 size
= bfd_get_reloc_size (reloc_howto
);
4673 as_bad (ngettext ("%s relocations do not fit in %u byte",
4674 "%s relocations do not fit in %u bytes",
4676 reloc_howto
->name
, nbytes
);
4679 else if (target_big_endian
)
4680 offset
= nbytes
- size
;
4701 as_bad (_("unsupported BFD relocation size %u"), size
);
4704 fix_new_exp (frag
, p
- frag
->fr_literal
+ offset
, size
,
4709 /* Handle an MRI style string expression. */
4713 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
)
4715 if (*input_line_pointer
!= '\''
4716 && (input_line_pointer
[1] != '\''
4717 || (*input_line_pointer
!= 'A'
4718 && *input_line_pointer
!= 'E')))
4719 (void) TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
4723 unsigned int result
= 0;
4725 /* An MRI style string. Cut into as many bytes as will fit into
4726 a nbyte chunk, left justify if necessary, and separate with
4727 commas so we can try again later. */
4728 if (*input_line_pointer
== 'A')
4729 ++input_line_pointer
;
4730 else if (*input_line_pointer
== 'E')
4732 as_bad (_("EBCDIC constants are not supported"));
4733 ++input_line_pointer
;
4736 input_line_pointer
++;
4737 for (scan
= 0; scan
< nbytes
; scan
++)
4739 if (*input_line_pointer
== '\'')
4741 if (input_line_pointer
[1] == '\'')
4743 input_line_pointer
++;
4748 result
= (result
<< 8) | (*input_line_pointer
++);
4752 while (scan
< nbytes
)
4758 /* Create correct expression. */
4759 exp
->X_op
= O_constant
;
4760 exp
->X_add_number
= result
;
4762 /* Fake it so that we can read the next char too. */
4763 if (input_line_pointer
[0] != '\'' ||
4764 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
4766 input_line_pointer
-= 2;
4767 input_line_pointer
[0] = ',';
4768 input_line_pointer
[1] = '\'';
4771 input_line_pointer
++;
4774 #endif /* TC_M68K */
4776 #ifdef REPEAT_CONS_EXPRESSIONS
4778 /* Parse a repeat expression for cons. This is used by the MIPS
4779 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4780 object file COUNT times.
4782 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4785 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
)
4792 if (*input_line_pointer
!= ':')
4794 /* No repeat count. */
4798 ++input_line_pointer
;
4799 expression (&count
);
4800 if (count
.X_op
!= O_constant
4801 || count
.X_add_number
<= 0)
4803 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4807 /* The cons function is going to output this expression once. So we
4808 output it count - 1 times. */
4809 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
4810 emit_expr (exp
, nbytes
);
4813 #endif /* REPEAT_CONS_EXPRESSIONS */
4815 /* Parse a floating point number represented as a hex constant. This
4816 permits users to specify the exact bits they want in the floating
4820 hex_float (int float_type
, char *bytes
)
4852 as_bad (_("unknown floating type type '%c'"), float_type
);
4856 /* It would be nice if we could go through expression to parse the
4857 hex constant, but if we get a bignum it's a pain to sort it into
4858 the buffer correctly. */
4860 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4864 /* The MRI assembler accepts arbitrary underscores strewn about
4865 through the hex constant, so we ignore them as well. */
4866 if (*input_line_pointer
== '_')
4868 ++input_line_pointer
;
4874 as_warn (_("floating point constant too large"));
4877 d
= hex_value (*input_line_pointer
) << 4;
4878 ++input_line_pointer
;
4879 while (*input_line_pointer
== '_')
4880 ++input_line_pointer
;
4881 if (hex_p (*input_line_pointer
))
4883 d
+= hex_value (*input_line_pointer
);
4884 ++input_line_pointer
;
4886 if (target_big_endian
)
4889 bytes
[length
- i
- 1] = d
;
4895 if (target_big_endian
)
4896 memset (bytes
+ i
, 0, length
- i
);
4898 memset (bytes
, 0, length
- i
);
4906 CONStruct some more frag chars of .floats .ffloats etc.
4907 Makes 0 or more new frags.
4908 If need_pass_2 == 1, no frags are emitted.
4909 This understands only floating literals, not expressions. Sorry.
4911 A floating constant is defined by atof_generic(), except it is preceded
4912 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4913 reading, I decided to be incompatible. This always tries to give you
4914 rounded bits to the precision of the pseudo-op. Former AS did premature
4915 truncation, restored noisy bits instead of trailing 0s AND gave you
4916 a choice of 2 flavours of noise according to which of 2 floating-point
4917 scanners you directed AS to use.
4919 In: input_line_pointer->whitespace before, or '0' of flonum. */
4922 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4923 int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4926 int length
; /* Number of chars in an object. */
4927 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4929 if (is_it_end_of_statement ())
4931 demand_empty_rest_of_line ();
4935 if (now_seg
== absolute_section
)
4937 as_bad (_("attempt to store float in absolute section"));
4938 ignore_rest_of_line ();
4944 as_bad (_("attempt to store float in section `%s'"),
4945 segment_name (now_seg
));
4946 ignore_rest_of_line ();
4950 #ifdef md_flush_pending_output
4951 md_flush_pending_output ();
4954 #ifdef md_cons_align
4960 length
= parse_one_float (float_type
, temp
);
4970 #ifdef REPEAT_CONS_EXPRESSIONS
4971 if (*input_line_pointer
== ':')
4973 expressionS count_exp
;
4975 ++input_line_pointer
;
4976 expression (&count_exp
);
4978 if (count_exp
.X_op
!= O_constant
4979 || count_exp
.X_add_number
<= 0)
4980 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4982 count
= count_exp
.X_add_number
;
4986 while (--count
>= 0)
4988 p
= frag_more (length
);
4989 memcpy (p
, temp
, (unsigned int) length
);
4994 while (*input_line_pointer
++ == ',');
4996 /* Put terminator back into stream. */
4997 --input_line_pointer
;
4998 demand_empty_rest_of_line ();
5003 Note - we are using the DWARF standard's definition of LEB128 encoding
5004 where each 7-bit value is a stored in a byte, *not* an octet. This
5005 means that on targets where a byte contains multiple octets there is
5006 a *huge waste of space*. (This also means that we do not have to
5007 have special versions of these functions for when OCTETS_PER_BYTE_POWER
5010 If the 7-bit values were to be packed into N-bit bytes (where N > 8)
5011 we would then have to consider whether multiple, successive LEB128
5012 values should be packed into the bytes without padding (bad idea) or
5013 whether each LEB128 number is padded out to a whole number of bytes.
5014 Plus you have to decide on the endianness of packing octets into a
5017 /* Return the size of a LEB128 value in bytes. */
5019 static inline unsigned int
5020 sizeof_sleb128 (offsetT value
)
5027 byte
= (value
& 0x7f);
5028 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
5029 Fortunately, we can structure things so that the extra work reduces
5030 to a noop on systems that do things "properly". */
5031 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
5034 while (!(((value
== 0) && ((byte
& 0x40) == 0))
5035 || ((value
== -1) && ((byte
& 0x40) != 0))));
5040 static inline unsigned int
5041 sizeof_uleb128 (valueT value
)
5056 sizeof_leb128 (valueT value
, int sign
)
5059 return sizeof_sleb128 ((offsetT
) value
);
5061 return sizeof_uleb128 (value
);
5064 /* Output a LEB128 value. Returns the number of bytes used. */
5066 static inline unsigned int
5067 output_sleb128 (char *p
, offsetT value
)
5074 unsigned byte
= (value
& 0x7f);
5076 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
5077 Fortunately, we can structure things so that the extra work reduces
5078 to a noop on systems that do things "properly". */
5079 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
5081 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
5082 || ((value
== -1) && ((byte
& 0x40) != 0))));
5093 static inline unsigned int
5094 output_uleb128 (char *p
, valueT value
)
5100 unsigned byte
= (value
& 0x7f);
5104 /* More bytes to follow. */
5115 output_leb128 (char *p
, valueT value
, int sign
)
5118 return output_sleb128 (p
, (offsetT
) value
);
5120 return output_uleb128 (p
, value
);
5123 /* Do the same for bignums. We combine sizeof with output here in that
5124 we don't output for NULL values of P. It isn't really as critical as
5125 for "normal" values that this be streamlined. Returns the number of
5128 static inline unsigned int
5129 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
)
5136 /* Strip leading sign extensions off the bignum. */
5138 && bignum
[size
- 1] == LITTLENUM_MASK
5139 && bignum
[size
- 2] > LITTLENUM_MASK
/ 2)
5144 /* OR in the next part of the littlenum. */
5145 val
|= (*bignum
<< loaded
);
5146 loaded
+= LITTLENUM_NUMBER_OF_BITS
;
5150 /* Add bytes until there are less than 7 bits left in VAL
5151 or until every non-sign bit has been written. */
5158 || val
!= ((byte
& 0x40) == 0 ? 0 : ((valueT
) 1 << loaded
) - 1))
5165 while ((byte
& 0x80) != 0 && loaded
>= 7);
5169 /* Mop up any left-over bits (of which there will be less than 7). */
5170 if ((byte
& 0x80) != 0)
5172 /* Sign-extend VAL. */
5173 if (val
& (1 << (loaded
- 1)))
5174 val
|= ~0U << loaded
;
5183 static inline unsigned int
5184 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
)
5191 /* Strip leading zeros off the bignum. */
5192 /* XXX: Is this needed? */
5193 while (size
> 0 && bignum
[size
- 1] == 0)
5198 if (loaded
< 7 && size
> 0)
5200 val
|= (*bignum
<< loaded
);
5201 loaded
+= 8 * CHARS_PER_LITTLENUM
;
5210 if (size
> 0 || val
)
5217 while (byte
& 0x80);
5223 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, unsigned int size
, int sign
)
5226 return output_big_sleb128 (p
, bignum
, size
);
5228 return output_big_uleb128 (p
, bignum
, size
);
5231 /* Generate the appropriate fragments for a given expression to emit a
5232 leb128 value. SIGN is 1 for sleb, 0 for uleb. */
5235 emit_leb128_expr (expressionS
*exp
, int sign
)
5237 operatorT op
= exp
->X_op
;
5238 unsigned int nbytes
;
5240 if (op
== O_absent
|| op
== O_illegal
)
5242 as_warn (_("zero assumed for missing expression"));
5243 exp
->X_add_number
= 0;
5246 else if (op
== O_big
&& exp
->X_add_number
<= 0)
5248 as_bad (_("floating point number invalid"));
5249 exp
->X_add_number
= 0;
5252 else if (op
== O_register
)
5254 as_warn (_("register value used as expression"));
5257 else if (op
== O_constant
5259 && (exp
->X_add_number
< 0) == !exp
->X_extrabit
)
5261 /* We're outputting a signed leb128 and the sign of X_add_number
5262 doesn't reflect the sign of the original value. Convert EXP
5263 to a correctly-extended bignum instead. */
5264 convert_to_bignum (exp
, exp
->X_extrabit
);
5268 if (now_seg
== absolute_section
)
5270 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
5271 as_bad (_("attempt to store value in absolute section"));
5272 abs_section_offset
++;
5276 if ((op
!= O_constant
|| exp
->X_add_number
!= 0) && in_bss ())
5277 as_bad (_("attempt to store non-zero value in section `%s'"),
5278 segment_name (now_seg
));
5280 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
5281 a signal that this is leb128 data. It shouldn't optimize this away. */
5282 nbytes
= (unsigned int) -1;
5283 if (check_eh_frame (exp
, &nbytes
))
5286 /* Let the backend know that subsequent data may be byte aligned. */
5287 #ifdef md_cons_align
5291 if (op
== O_constant
)
5293 /* If we've got a constant, emit the thing directly right now. */
5295 valueT value
= exp
->X_add_number
;
5299 size
= sizeof_leb128 (value
, sign
);
5300 p
= frag_more (size
);
5301 if (output_leb128 (p
, value
, sign
) > size
)
5304 else if (op
== O_big
)
5306 /* O_big is a different sort of constant. */
5307 int nbr_digits
= exp
->X_add_number
;
5311 /* If the leading littenum is 0xffff, prepend a 0 to avoid confusion with
5312 a signed number. Unary operators like - or ~ always extend the
5313 bignum to its largest size. */
5315 && nbr_digits
< SIZE_OF_LARGE_NUMBER
5316 && generic_bignum
[nbr_digits
- 1] == LITTLENUM_MASK
)
5317 generic_bignum
[nbr_digits
++] = 0;
5319 size
= output_big_leb128 (NULL
, generic_bignum
, nbr_digits
, sign
);
5320 p
= frag_more (size
);
5321 if (output_big_leb128 (p
, generic_bignum
, nbr_digits
, sign
) > size
)
5326 /* Otherwise, we have to create a variable sized fragment and
5327 resolve things later. */
5329 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
5330 make_expr_symbol (exp
), 0, (char *) NULL
);
5334 /* Parse the .sleb128 and .uleb128 pseudos. */
5341 #ifdef md_flush_pending_output
5342 md_flush_pending_output ();
5348 emit_leb128_expr (&exp
, sign
);
5350 while (*input_line_pointer
++ == ',');
5352 input_line_pointer
--;
5353 demand_empty_rest_of_line ();
5357 stringer_append_char (int c
, int bitsize
)
5360 as_bad (_("attempt to store non-empty string in section `%s'"),
5361 segment_name (now_seg
));
5363 if (!target_big_endian
)
5364 FRAG_APPEND_1_CHAR (c
);
5369 FRAG_APPEND_1_CHAR (0);
5370 FRAG_APPEND_1_CHAR (0);
5371 FRAG_APPEND_1_CHAR (0);
5372 FRAG_APPEND_1_CHAR (0);
5375 FRAG_APPEND_1_CHAR (0);
5376 FRAG_APPEND_1_CHAR (0);
5379 FRAG_APPEND_1_CHAR (0);
5384 /* Called with invalid bitsize argument. */
5388 if (target_big_endian
)
5389 FRAG_APPEND_1_CHAR (c
);
5392 /* Worker to do .ascii etc statements.
5393 Reads 0 or more ',' separated, double-quoted strings.
5394 Caller should have checked need_pass_2 is FALSE because we don't
5396 Checks for end-of-line.
5397 BITS_APPENDZERO says how many bits are in a target char.
5398 The bottom bit is set if a NUL char should be appended to the strings. */
5401 stringer (int bits_appendzero
)
5403 const int bitsize
= bits_appendzero
& ~7;
5404 const int append_zero
= bits_appendzero
& 1;
5406 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5410 #ifdef md_flush_pending_output
5411 md_flush_pending_output ();
5414 #ifdef md_cons_align
5418 /* If we have been switched into the abs_section then we
5419 will not have an obstack onto which we can hang strings. */
5420 if (now_seg
== absolute_section
)
5422 as_bad (_("strings must be placed into a section"));
5423 ignore_rest_of_line ();
5427 /* The following awkward logic is to parse ZERO or more strings,
5428 comma separated. Recall a string expression includes spaces
5429 before the opening '\"' and spaces after the closing '\"'.
5430 We fake a leading ',' if there is (supposed to be)
5431 a 1st, expression. We keep demanding expressions for each ','. */
5432 if (is_it_end_of_statement ())
5434 c
= 0; /* Skip loop. */
5435 ++input_line_pointer
; /* Compensate for end of loop. */
5439 c
= ','; /* Do loop. */
5442 while (c
== ',' || c
== '<' || c
== '"')
5445 switch (*input_line_pointer
)
5448 ++input_line_pointer
; /*->1st char of string. */
5449 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5450 start
= input_line_pointer
;
5453 while (is_a_char (c
= next_char_of_string ()))
5454 stringer_append_char (c
, bitsize
);
5456 /* Treat "a" "b" as "ab". Even if we are appending zeros. */
5457 SKIP_ALL_WHITESPACE ();
5458 if (*input_line_pointer
== '"')
5462 stringer_append_char (0, bitsize
);
5464 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5465 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
5466 will emit .string with a filename in the .debug section
5467 after a sequence of constants. See the comment in
5468 emit_expr for the sequence. emit_expr will set
5469 dwarf_file_string to non-zero if this string might be a
5470 source file name. */
5471 if (strcmp (segment_name (now_seg
), ".debug") != 0)
5472 dwarf_file_string
= 0;
5473 else if (dwarf_file_string
)
5475 c
= input_line_pointer
[-1];
5476 input_line_pointer
[-1] = '\0';
5477 listing_source_file (start
);
5478 input_line_pointer
[-1] = c
;
5484 input_line_pointer
++;
5485 c
= get_single_number ();
5486 stringer_append_char (c
, bitsize
);
5487 if (*input_line_pointer
!= '>')
5489 as_bad (_("expected <nn>"));
5490 ignore_rest_of_line ();
5493 input_line_pointer
++;
5496 input_line_pointer
++;
5500 c
= *input_line_pointer
;
5503 demand_empty_rest_of_line ();
5506 /* FIXME-SOMEDAY: I had trouble here on characters with the
5507 high bits set. We'll probably also have trouble with
5508 multibyte chars, wide chars, etc. Also be careful about
5509 returning values bigger than 1 byte. xoxorich. */
5512 next_char_of_string (void)
5516 c
= *input_line_pointer
++ & CHAR_MASK
;
5520 /* PR 20902: Do not advance past the end of the buffer. */
5521 -- input_line_pointer
;
5530 as_warn (_("unterminated string; newline inserted"));
5531 bump_line_counters ();
5535 if (!TC_STRING_ESCAPES
)
5537 switch (c
= *input_line_pointer
++ & CHAR_MASK
)
5565 break; /* As itself. */
5581 for (i
= 0, number
= 0;
5582 ISDIGIT (c
) && i
< 3;
5583 c
= *input_line_pointer
++, i
++)
5585 number
= number
* 8 + c
- '0';
5588 c
= number
& CHAR_MASK
;
5590 --input_line_pointer
;
5599 c
= *input_line_pointer
++;
5600 while (ISXDIGIT (c
))
5603 number
= number
* 16 + c
- '0';
5604 else if (ISUPPER (c
))
5605 number
= number
* 16 + c
- 'A' + 10;
5607 number
= number
* 16 + c
- 'a' + 10;
5608 c
= *input_line_pointer
++;
5610 c
= number
& CHAR_MASK
;
5611 --input_line_pointer
;
5616 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
5617 as_warn (_("unterminated string; newline inserted"));
5619 bump_line_counters ();
5623 /* Do not advance past the end of the buffer. */
5624 -- input_line_pointer
;
5630 #ifdef ONLY_STANDARD_ESCAPES
5631 as_bad (_("bad escaped character in string"));
5633 #endif /* ONLY_STANDARD_ESCAPES */
5646 get_segmented_expression (expressionS
*expP
)
5650 retval
= expression (expP
);
5651 if (expP
->X_op
== O_illegal
5652 || expP
->X_op
== O_absent
5653 || expP
->X_op
== O_big
)
5655 as_bad (_("expected address expression"));
5656 expP
->X_op
= O_constant
;
5657 expP
->X_add_number
= 0;
5658 retval
= absolute_section
;
5664 get_known_segmented_expression (expressionS
*expP
)
5666 segT retval
= get_segmented_expression (expP
);
5668 if (retval
== undefined_section
)
5670 /* There is no easy way to extract the undefined symbol from the
5672 if (expP
->X_add_symbol
!= NULL
5673 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
5674 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5675 S_GET_NAME (expP
->X_add_symbol
));
5677 as_warn (_("some symbol undefined; zero assumed"));
5678 retval
= absolute_section
;
5679 expP
->X_op
= O_constant
;
5680 expP
->X_add_number
= 0;
5685 char /* Return terminator. */
5686 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
5688 /* FIXME: val_pointer should probably be offsetT *. */
5689 *val_pointer
= (long) get_absolute_expression ();
5690 return (*input_line_pointer
++);
5693 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
5694 Give a warning if that happens. */
5697 demand_copy_C_string (int *len_pointer
)
5701 if ((s
= demand_copy_string (len_pointer
)) != 0)
5705 for (len
= *len_pointer
; len
> 0; len
--)
5707 if (s
[len
- 1] == 0)
5711 as_bad (_("this string may not contain \'\\0\'"));
5720 /* Demand string, but return a safe (=private) copy of the string.
5721 Return NULL if we can't read a string here. */
5724 demand_copy_string (int *lenP
)
5732 if (*input_line_pointer
== '\"')
5734 input_line_pointer
++; /* Skip opening quote. */
5736 while (is_a_char (c
= next_char_of_string ()))
5738 obstack_1grow (¬es
, c
);
5741 /* JF this next line is so demand_copy_C_string will return a
5742 null terminated string. */
5743 obstack_1grow (¬es
, '\0');
5744 retval
= (char *) obstack_finish (¬es
);
5748 as_bad (_("missing string"));
5750 ignore_rest_of_line ();
5756 /* In: Input_line_pointer->next character.
5758 Do: Skip input_line_pointer over all whitespace.
5760 Out: 1 if input_line_pointer->end-of-line. */
5763 is_it_end_of_statement (void)
5766 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
5770 equals (char *sym_name
, int reassign
)
5775 input_line_pointer
++;
5776 if (*input_line_pointer
== '=')
5777 input_line_pointer
++;
5778 if (reassign
< 0 && *input_line_pointer
== '=')
5779 input_line_pointer
++;
5781 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
5782 input_line_pointer
++;
5785 stop
= mri_comment_field (&stopc
);
5787 assign_symbol (sym_name
, reassign
>= 0 ? !reassign
: reassign
);
5791 demand_empty_rest_of_line ();
5792 mri_comment_end (stop
, stopc
);
5796 /* .incbin -- include a file verbatim at the current location. */
5799 s_incbin (int x ATTRIBUTE_UNUSED
)
5810 #ifdef md_flush_pending_output
5811 md_flush_pending_output ();
5814 #ifdef md_cons_align
5819 filename
= demand_copy_string (& len
);
5820 if (filename
== NULL
)
5825 /* Look for optional skip and count. */
5826 if (* input_line_pointer
== ',')
5828 ++ input_line_pointer
;
5829 skip
= get_absolute_expression ();
5833 if (* input_line_pointer
== ',')
5835 ++ input_line_pointer
;
5837 count
= get_absolute_expression ();
5839 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
5845 demand_empty_rest_of_line ();
5847 /* Try opening absolute path first, then try include dirs. */
5848 binfile
= fopen (filename
, FOPEN_RB
);
5849 if (binfile
== NULL
)
5853 path
= XNEWVEC (char, (unsigned long) len
+ include_dir_maxlen
+ 5);
5855 for (i
= 0; i
< include_dir_count
; i
++)
5857 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
5859 binfile
= fopen (path
, FOPEN_RB
);
5860 if (binfile
!= NULL
)
5864 if (binfile
== NULL
)
5865 as_bad (_("file not found: %s"), filename
);
5868 path
= xstrdup (filename
);
5873 struct stat filestat
;
5875 if (fstat (fileno (binfile
), &filestat
) != 0
5876 || ! S_ISREG (filestat
.st_mode
)
5877 || S_ISDIR (filestat
.st_mode
))
5879 as_bad (_("unable to include `%s'"), path
);
5883 register_dependency (path
);
5885 /* Compute the length of the file. */
5886 if (fseek (binfile
, 0, SEEK_END
) != 0)
5888 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
5891 file_len
= ftell (binfile
);
5893 /* If a count was not specified use the remainder of the file. */
5895 count
= file_len
- skip
;
5897 if (skip
< 0 || count
< 0 || file_len
< 0 || skip
+ count
> file_len
)
5899 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5900 skip
, count
, file_len
);
5904 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
5906 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
5910 /* Allocate frag space and store file contents in it. */
5911 binfrag
= frag_more (count
);
5913 bytes
= fread (binfrag
, 1, count
, binfile
);
5915 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5916 path
, bytes
, count
);
5919 if (binfile
!= NULL
)
5924 /* .include -- include a file at this point. */
5927 s_include (int arg ATTRIBUTE_UNUSED
)
5936 filename
= demand_copy_string (&i
);
5937 if (filename
== NULL
)
5939 /* demand_copy_string has already printed an error and
5940 called ignore_rest_of_line. */
5948 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
5949 && *input_line_pointer
!= ' '
5950 && *input_line_pointer
!= '\t')
5952 obstack_1grow (¬es
, *input_line_pointer
);
5953 ++input_line_pointer
;
5957 obstack_1grow (¬es
, '\0');
5958 filename
= (char *) obstack_finish (¬es
);
5959 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5960 ++input_line_pointer
;
5963 demand_empty_rest_of_line ();
5964 path
= XNEWVEC (char, (unsigned long) i
5965 + include_dir_maxlen
+ 5 /* slop */ );
5967 for (i
= 0; i
< include_dir_count
; i
++)
5969 strcpy (path
, include_dirs
[i
]);
5971 strcat (path
, filename
);
5972 if (0 != (try_file
= fopen (path
, FOPEN_RT
)))
5982 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5983 register_dependency (path
);
5984 input_scrub_insert_file (path
);
5988 add_include_dir (char *path
)
5992 if (include_dir_count
== 0)
5994 include_dirs
= XNEWVEC (const char *, 2);
5995 include_dirs
[0] = "."; /* Current dir. */
5996 include_dir_count
= 2;
6000 include_dir_count
++;
6001 include_dirs
= XRESIZEVEC (const char *, include_dirs
,
6005 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
6008 if (i
> include_dir_maxlen
)
6009 include_dir_maxlen
= i
;
6012 /* Output debugging information to denote the source file. */
6015 generate_file_debug (void)
6017 if (debug_type
== DEBUG_STABS
)
6018 stabs_generate_asm_file ();
6021 /* Output line number debugging information for the current source line. */
6024 generate_lineno_debug (void)
6028 case DEBUG_UNSPECIFIED
:
6033 stabs_generate_asm_lineno ();
6036 ecoff_generate_asm_lineno ();
6039 /* ??? We could here indicate to dwarf2dbg.c that something
6040 has changed. However, since there is additional backend
6041 support that is required (calling dwarf2_emit_insn), we
6042 let dwarf2dbg.c call as_where on its own. */
6047 /* Output debugging information to mark a function entry point or end point.
6048 END_P is zero for .func, and non-zero for .endfunc. */
6053 do_s_func (end_p
, NULL
);
6056 /* Subroutine of s_func so targets can choose a different default prefix.
6057 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
6060 do_s_func (int end_p
, const char *default_prefix
)
6062 /* Record the current function so that we can issue an error message for
6063 misplaced .func,.endfunc, and also so that .endfunc needs no
6065 static char *current_name
;
6066 static char *current_label
;
6070 if (current_name
== NULL
)
6072 as_bad (_("missing .func"));
6073 ignore_rest_of_line ();
6077 if (debug_type
== DEBUG_STABS
)
6078 stabs_generate_asm_endfunc (current_name
, current_label
);
6080 current_name
= current_label
= NULL
;
6085 char delim1
, delim2
;
6087 if (current_name
!= NULL
)
6089 as_bad (_(".endfunc missing for previous .func"));
6090 ignore_rest_of_line ();
6094 delim1
= get_symbol_name (& name
);
6095 name
= xstrdup (name
);
6096 *input_line_pointer
= delim1
;
6097 SKIP_WHITESPACE_AFTER_NAME ();
6098 if (*input_line_pointer
!= ',')
6102 if (asprintf (&label
, "%s%s", default_prefix
, name
) == -1)
6103 as_fatal ("%s", xstrerror (errno
));
6107 char leading_char
= bfd_get_symbol_leading_char (stdoutput
);
6108 /* Missing entry point, use function's name with the leading
6112 if (asprintf (&label
, "%c%s", leading_char
, name
) == -1)
6113 as_fatal ("%s", xstrerror (errno
));
6121 ++input_line_pointer
;
6123 delim2
= get_symbol_name (& label
);
6124 label
= xstrdup (label
);
6125 restore_line_pointer (delim2
);
6128 if (debug_type
== DEBUG_STABS
)
6129 stabs_generate_asm_func (name
, label
);
6131 current_name
= name
;
6132 current_label
= label
;
6135 demand_empty_rest_of_line ();
6138 #ifdef HANDLE_BUNDLE
6141 s_bundle_align_mode (int arg ATTRIBUTE_UNUSED
)
6143 unsigned int align
= get_absolute_expression ();
6145 demand_empty_rest_of_line ();
6147 if (align
> (unsigned int) TC_ALIGN_LIMIT
)
6148 as_fatal (_(".bundle_align_mode alignment too large (maximum %u)"),
6149 (unsigned int) TC_ALIGN_LIMIT
);
6151 if (bundle_lock_frag
!= NULL
)
6153 as_bad (_("cannot change .bundle_align_mode inside .bundle_lock"));
6157 bundle_align_p2
= align
;
6161 s_bundle_lock (int arg ATTRIBUTE_UNUSED
)
6163 demand_empty_rest_of_line ();
6165 if (bundle_align_p2
== 0)
6167 as_bad (_(".bundle_lock is meaningless without .bundle_align_mode"));
6171 if (bundle_lock_depth
== 0)
6173 bundle_lock_frchain
= frchain_now
;
6174 bundle_lock_frag
= start_bundle ();
6176 ++bundle_lock_depth
;
6180 s_bundle_unlock (int arg ATTRIBUTE_UNUSED
)
6184 demand_empty_rest_of_line ();
6186 if (bundle_lock_frag
== NULL
)
6188 as_bad (_(".bundle_unlock without preceding .bundle_lock"));
6192 gas_assert (bundle_align_p2
> 0);
6194 gas_assert (bundle_lock_depth
> 0);
6195 if (--bundle_lock_depth
> 0)
6198 size
= pending_bundle_size (bundle_lock_frag
);
6200 if (size
> 1U << bundle_align_p2
)
6201 as_bad (_(".bundle_lock sequence is %u bytes, "
6202 "but bundle size is only %u bytes"),
6203 size
, 1u << bundle_align_p2
);
6205 finish_bundle (bundle_lock_frag
, size
);
6207 bundle_lock_frag
= NULL
;
6208 bundle_lock_frchain
= NULL
;
6211 #endif /* HANDLE_BUNDLE */
6214 s_ignore (int arg ATTRIBUTE_UNUSED
)
6216 ignore_rest_of_line ();
6220 read_print_statistics (FILE *file
)
6222 htab_print_statistics (file
, "pseudo-op table", po_hash
);
6225 /* Inserts the given line into the input stream.
6227 This call avoids macro/conditionals nesting checking, since the contents of
6228 the line are assumed to replace the contents of a line already scanned.
6230 An appropriate use of this function would be substitution of input lines when
6231 called by md_start_line_hook(). The given line is assumed to already be
6232 properly scrubbed. */
6235 input_scrub_insert_line (const char *line
)
6238 size_t len
= strlen (line
);
6239 sb_build (&newline
, len
);
6240 sb_add_buffer (&newline
, line
, len
);
6241 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
6243 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
6246 /* Insert a file into the input stream; the path must resolve to an actual
6247 file; no include path searching or dependency registering is performed. */
6250 input_scrub_insert_file (char *path
)
6252 input_scrub_include_file (path
, input_line_pointer
);
6253 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
6256 /* Find the end of a line, considering quotation and escaping of quotes. */
6258 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
6259 # define TC_SINGLE_QUOTE_STRINGS 1
6263 _find_end_of_line (char *s
, int mri_string
, int insn ATTRIBUTE_UNUSED
,
6266 char inquote
= '\0';
6269 while (!is_end_of_line
[(unsigned char) *s
]
6270 || (inquote
&& !ISCNTRL (*s
))
6271 || (inquote
== '\'' && flag_mri
)
6272 #ifdef TC_EOL_IN_INSN
6273 || (insn
&& TC_EOL_IN_INSN (s
))
6275 /* PR 6926: When we are parsing the body of a macro the sequence
6276 \@ is special - it refers to the invocation count. If the @
6277 character happens to be registered as a line-separator character
6278 by the target, then the is_end_of_line[] test above will have
6279 returned true, but we need to ignore the line separating
6280 semantics in this particular case. */
6281 || (in_macro
&& inescape
&& *s
== '@')
6284 if (mri_string
&& *s
== '\'')
6288 else if (*s
== '\\')
6292 #ifdef TC_SINGLE_QUOTE_STRINGS
6293 || (TC_SINGLE_QUOTE_STRINGS
&& *s
== '\'')
6300 as_warn (_("missing closing `%c'"), inquote
);
6301 if (inescape
&& !ignore_input ())
6302 as_warn (_("stray `\\'"));
6307 find_end_of_line (char *s
, int mri_string
)
6309 return _find_end_of_line (s
, mri_string
, 0, 0);
6312 static char *saved_ilp
= NULL
;
6313 static char *saved_limit
;
6315 /* Use BUF as a temporary input pointer for calling other functions in this
6316 file. BUF must be a C string, so that its end can be found by strlen.
6317 Also sets the buffer_limit variable (local to this file) so that buffer
6318 overruns should not occur. Saves the current input line pointer so that
6319 it can be restored by calling restore_ilp().
6321 Does not support recursion. */
6324 temp_ilp (char *buf
)
6326 gas_assert (saved_ilp
== NULL
);
6327 gas_assert (buf
!= NULL
);
6329 saved_ilp
= input_line_pointer
;
6330 saved_limit
= buffer_limit
;
6331 /* Prevent the assert in restore_ilp from triggering if
6332 the input_line_pointer has not yet been initialised. */
6333 if (saved_ilp
== NULL
)
6334 saved_limit
= saved_ilp
= (char *) "";
6336 input_line_pointer
= buf
;
6337 buffer_limit
= buf
+ strlen (buf
);
6338 input_from_string
= true;
6341 /* Restore a saved input line pointer. */
6346 gas_assert (saved_ilp
!= NULL
);
6348 input_line_pointer
= saved_ilp
;
6349 buffer_limit
= saved_limit
;
6350 input_from_string
= false;