1 /* read.c - read a source file -
2 Copyright (C) 1986-2015 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 GAS is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to the Free
18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
21 /* If your chars aren't 8 bits, you will change this a bit (eg. to 0xFF).
22 But then, GNU isn't spozed to run on your machine anyway.
23 (RMS is so shortsighted sometimes.) */
24 #define MASK_CHAR ((int)(unsigned char) -1)
26 /* This is the largest known floating point format (for now). It will
27 grow when we do 4361 style flonums. */
28 #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
30 /* Routines that read assembler source text to build spaghetti in memory.
31 Another group of these functions is in the expr.c module. */
34 #include "safe-ctype.h"
40 #include "dw2gencfi.h"
43 #ifndef TC_START_LABEL
44 #define TC_START_LABEL(x,y,z) (x == ':')
47 /* Set by the object-format or the target. */
48 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
49 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
54 else if ((SIZE) >= 4) \
56 else if ((SIZE) >= 2) \
64 char *input_line_pointer
; /*->next char of source file to parse. */
66 #if BITS_PER_CHAR != 8
67 /* The following table is indexed by[(char)] and will break if
68 a char does not have exactly 256 states (hopefully 0:255!)! */
77 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
82 /* The Delta 68k assembler permits % inside label names. */
87 /* The PowerPC Windows NT assemblers permits ? inside label names. */
92 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
93 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
102 /* The Delta 68k assembler permits ~ at start of label names. */
106 /* Used by is_... macros. our ctype[]. */
107 char lex_type
[256] = {
108 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
110 0, 0, 0, LEX_HASH
, LEX_DOLLAR
, LEX_PCT
, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
111 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM
, /* 0123456789:;<=>? */
112 LEX_AT
, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
113 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, 0, 3, /* PQRSTUVWXYZ[\]^_ */
114 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
115 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, LEX_TILDE
, 0, /* pqrstuvwxyz{|}~. */
116 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
117 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
118 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
119 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
120 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
121 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
122 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
123 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
127 Out: 1 if this character ends a line.
128 2 if this character is a line separator. */
129 char is_end_of_line
[256] = {
131 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
133 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
135 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
136 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
137 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
140 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
141 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
142 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
143 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
144 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
145 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
146 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
147 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
148 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
152 #ifndef TC_CASE_SENSITIVE
153 char original_case_string
[128];
156 /* Functions private to this file. */
158 static char *buffer
; /* 1st char of each buffer of lines is here. */
159 static char *buffer_limit
; /*->1 + last char in buffer. */
161 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
162 in the tc-<CPU>.h file. See the "Porting GAS" section of the
164 int target_big_endian
= TARGET_BYTES_BIG_ENDIAN
;
166 /* Variables for handling include file directory table. */
168 /* Table of pointers to directories to search for .include's. */
171 /* How many are in the table. */
172 int include_dir_count
;
174 /* Length of longest in table. */
175 int include_dir_maxlen
= 1;
177 #ifndef WORKING_DOT_WORD
178 struct broken_word
*broken_words
;
179 int new_broken_words
;
182 /* The current offset into the absolute section. We don't try to
183 build frags in the absolute section, since no data can be stored
184 there. We just keep track of the current offset. */
185 addressT abs_section_offset
;
187 /* If this line had an MRI style label, it is stored in this variable.
188 This is used by some of the MRI pseudo-ops. */
191 /* This global variable is used to support MRI common sections. We
192 translate such sections into a common symbol. This variable is
193 non-NULL when we are in an MRI common section. */
194 symbolS
*mri_common_symbol
;
196 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
197 need to align to an even byte boundary unless the next pseudo-op is
198 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
200 static int mri_pending_align
;
204 /* This variable is set to be non-zero if the next string we see might
205 be the name of the source file in DWARF debugging information. See
206 the comment in emit_expr for the format we look for. */
207 static int dwarf_file_string
;
211 /* If the target defines the md_frag_max_var hook then we know
212 enough to implement the .bundle_align_mode features. */
213 #ifdef md_frag_max_var
214 # define HANDLE_BUNDLE
218 /* .bundle_align_mode sets this. Normally it's zero. When nonzero,
219 it's the exponent of the bundle size, and aligned instruction bundle
220 mode is in effect. */
221 static unsigned int bundle_align_p2
;
223 /* These are set by .bundle_lock and .bundle_unlock. .bundle_lock sets
224 bundle_lock_frag to frag_now and then starts a new frag with
225 frag_align_code. At the same time, bundle_lock_frain gets frchain_now,
226 so that .bundle_unlock can verify that we didn't change segments.
227 .bundle_unlock resets both to NULL. If we detect a bundling violation,
228 then we reset bundle_lock_frchain to NULL as an indicator that we've
229 already diagnosed the error with as_bad and don't need a cascade of
230 redundant errors, but bundle_lock_frag remains set to indicate that
231 we are expecting to see .bundle_unlock. */
232 static fragS
*bundle_lock_frag
;
233 static frchainS
*bundle_lock_frchain
;
235 /* This is incremented by .bundle_lock and decremented by .bundle_unlock,
237 static unsigned int bundle_lock_depth
;
240 static void do_s_func (int end_p
, const char *default_prefix
);
241 static void do_align (int, char *, int, int);
242 static void s_align (int, int);
243 static void s_altmacro (int);
244 static void s_bad_end (int);
245 static void s_reloc (int);
246 static int hex_float (int, char *);
247 static segT
get_known_segmented_expression (expressionS
* expP
);
248 static void pobegin (void);
249 static size_t get_non_macro_line_sb (sb
*);
250 static void generate_file_debug (void);
251 static char *_find_end_of_line (char *, int, int, int);
259 obj_read_begin_hook ();
261 /* Something close -- but not too close -- to a multiple of 1024.
262 The debugging malloc I'm using has 24 bytes of overhead. */
263 obstack_begin (¬es
, chunksize
);
264 obstack_begin (&cond_obstack
, chunksize
);
266 #ifndef tc_line_separator_chars
267 #define tc_line_separator_chars line_separator_chars
269 /* Use machine dependent syntax. */
270 for (p
= tc_line_separator_chars
; *p
; p
++)
271 is_end_of_line
[(unsigned char) *p
] = 2;
272 /* Use more. FIXME-SOMEDAY. */
278 #ifndef TC_ADDRESS_BYTES
279 #define TC_ADDRESS_BYTES address_bytes
284 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
285 contain an address. */
286 int n
= (stdoutput
->arch_info
->bits_per_address
- 1) / 8;
294 /* Set up pseudo-op tables. */
296 static struct hash_control
*po_hash
;
298 static const pseudo_typeS potable
[] = {
299 {"abort", s_abort
, 0},
300 {"align", s_align_ptwo
, 0},
301 {"altmacro", s_altmacro
, 1},
302 {"ascii", stringer
, 8+0},
303 {"asciz", stringer
, 8+1},
304 {"balign", s_align_bytes
, 0},
305 {"balignw", s_align_bytes
, -2},
306 {"balignl", s_align_bytes
, -4},
309 {"bundle_align_mode", s_bundle_align_mode
, 0},
310 {"bundle_lock", s_bundle_lock
, 0},
311 {"bundle_unlock", s_bundle_unlock
, 0},
315 {"common", s_mri_common
, 0},
316 {"common.s", s_mri_common
, 1},
319 #ifdef TC_ADDRESS_BYTES
323 {"dc.d", float_cons
, 'd'},
325 {"dc.s", float_cons
, 'f'},
327 {"dc.x", float_cons
, 'x'},
329 {"dcb.b", s_space
, 1},
330 {"dcb.d", s_float_space
, 'd'},
331 {"dcb.l", s_space
, 4},
332 {"dcb.s", s_float_space
, 'f'},
333 {"dcb.w", s_space
, 2},
334 {"dcb.x", s_float_space
, 'x'},
336 {"ds.b", s_space
, 1},
337 {"ds.d", s_space
, 8},
338 {"ds.l", s_space
, 4},
339 {"ds.p", s_space
, 12},
340 {"ds.s", s_space
, 4},
341 {"ds.w", s_space
, 2},
342 {"ds.x", s_space
, 12},
343 {"debug", s_ignore
, 0},
348 {"double", float_cons
, 'd'},
350 {"eject", listing_eject
, 0}, /* Formfeed listing. */
352 {"elsec", s_else
, 0},
353 {"elseif", s_elseif
, (int) O_ne
},
355 {"endc", s_endif
, 0},
356 {"endfunc", s_func
, 1},
357 {"endif", s_endif
, 0},
358 {"endm", s_bad_end
, 0},
359 {"endr", s_bad_end
, 1},
365 {"error", s_errwarn
, 1},
366 {"exitm", s_mexit
, 0},
368 {"extern", s_ignore
, 0}, /* We treat all undef as ext. */
369 {"appfile", s_app_file
, 1},
370 {"appline", s_app_line
, 1},
372 {"file", s_app_file
, 0},
374 {"float", float_cons
, 'f'},
375 {"format", s_ignore
, 0},
377 {"global", s_globl
, 0},
378 {"globl", s_globl
, 0},
380 {"if", s_if
, (int) O_ne
},
383 {"ifdef", s_ifdef
, 0},
384 {"ifeq", s_if
, (int) O_eq
},
385 {"ifeqs", s_ifeqs
, 0},
386 {"ifge", s_if
, (int) O_ge
},
387 {"ifgt", s_if
, (int) O_gt
},
388 {"ifle", s_if
, (int) O_le
},
389 {"iflt", s_if
, (int) O_lt
},
392 {"ifndef", s_ifdef
, 1},
393 {"ifne", s_if
, (int) O_ne
},
394 {"ifnes", s_ifeqs
, 1},
395 {"ifnotdef", s_ifdef
, 1},
396 {"incbin", s_incbin
, 0},
397 {"include", s_include
, 0},
403 {"lcomm", s_lcomm
, 0},
404 {"lflags", s_ignore
, 0}, /* Listing flags. */
405 {"linefile", s_app_line
, 0},
406 {"linkonce", s_linkonce
, 0},
407 {"list", listing_list
, 1}, /* Turn listing on. */
408 {"llen", listing_psize
, 1},
411 {"macro", s_macro
, 0},
412 {"mexit", s_mexit
, 0},
414 {".mri", s_mri
, 0}, /* Special case so .mri works in MRI mode. */
415 {"name", s_ignore
, 0},
416 {"noaltmacro", s_altmacro
, 0},
417 {"noformat", s_ignore
, 0},
418 {"nolist", listing_list
, 0}, /* Turn listing off. */
419 {"nopage", listing_nopage
, 0},
421 {"offset", s_struct
, 0},
423 {"p2align", s_align_ptwo
, 0},
424 {"p2alignw", s_align_ptwo
, -2},
425 {"p2alignl", s_align_ptwo
, -4},
426 {"page", listing_eject
, 0},
427 {"plen", listing_psize
, 0},
428 {"print", s_print
, 0},
429 {"psize", listing_psize
, 0}, /* Set paper size. */
430 {"purgem", s_purgem
, 0},
432 {"reloc", s_reloc
, 0},
436 {"sbttl", listing_title
, 1}, /* Subtitle of listing. */
441 {"single", float_cons
, 'f'},
443 {"space", s_space
, 0},
444 {"skip", s_space
, 0},
445 {"sleb128", s_leb128
, 1},
446 {"spc", s_ignore
, 0},
447 {"stabd", s_stab
, 'd'},
448 {"stabn", s_stab
, 'n'},
449 {"stabs", s_stab
, 's'},
450 {"string", stringer
, 8+1},
451 {"string8", stringer
, 8+1},
452 {"string16", stringer
, 16+1},
453 {"string32", stringer
, 32+1},
454 {"string64", stringer
, 64+1},
455 {"struct", s_struct
, 0},
459 /* This is for gcc to use. It's only just been added (2/94), so gcc
460 won't be able to use it for a while -- probably a year or more.
461 But once this has been released, check with gcc maintainers
462 before deleting it or even changing the spelling. */
463 {"this_GCC_requires_the_GNU_assembler", s_ignore
, 0},
464 /* If we're folding case -- done for some targets, not necessarily
465 all -- the above string in an input file will be converted to
466 this one. Match it either way... */
467 {"this_gcc_requires_the_gnu_assembler", s_ignore
, 0},
469 {"title", listing_title
, 0}, /* Listing title. */
470 {"ttl", listing_title
, 0},
472 {"uleb128", s_leb128
, 0},
476 {"xdef", s_globl
, 0},
477 {"xref", s_ignore
, 0},
478 {"xstabs", s_xstab
, 's'},
479 {"warning", s_errwarn
, 0},
480 {"weakref", s_weakref
, 0},
482 {"zero", s_space
, 0},
483 {NULL
, NULL
, 0} /* End sentinel. */
487 get_absolute_expr (expressionS
*exp
)
489 expression_and_evaluate (exp
);
490 if (exp
->X_op
!= O_constant
)
492 if (exp
->X_op
!= O_absent
)
493 as_bad (_("bad or irreducible absolute expression"));
494 exp
->X_add_number
= 0;
496 return exp
->X_add_number
;
500 get_absolute_expression (void)
504 return get_absolute_expr (&exp
);
507 static int pop_override_ok
= 0;
508 static const char *pop_table_name
;
511 pop_insert (const pseudo_typeS
*table
)
514 const pseudo_typeS
*pop
;
515 for (pop
= table
; pop
->poc_name
; pop
++)
517 errtxt
= hash_insert (po_hash
, pop
->poc_name
, (char *) pop
);
518 if (errtxt
&& (!pop_override_ok
|| strcmp (errtxt
, "exists")))
519 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name
,
524 #ifndef md_pop_insert
525 #define md_pop_insert() pop_insert(md_pseudo_table)
528 #ifndef obj_pop_insert
529 #define obj_pop_insert() pop_insert(obj_pseudo_table)
532 #ifndef cfi_pop_insert
533 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
539 po_hash
= hash_new ();
541 /* Do the target-specific pseudo ops. */
542 pop_table_name
= "md";
545 /* Now object specific. Skip any that were in the target table. */
546 pop_table_name
= "obj";
550 /* Now portable ones. Skip any that we've seen already. */
551 pop_table_name
= "standard";
552 pop_insert (potable
);
555 pop_table_name
= "cfi";
560 #define HANDLE_CONDITIONAL_ASSEMBLY(num_read) \
561 if (ignore_input ()) \
563 char *eol = find_end_of_line (input_line_pointer - (num_read), \
565 input_line_pointer = (input_line_pointer <= buffer_limit \
566 && eol >= buffer_limit) \
572 /* This function is used when scrubbing the characters between #APP
575 static char *scrub_string
;
576 static char *scrub_string_end
;
579 scrub_from_string (char *buf
, size_t buflen
)
583 copy
= scrub_string_end
- scrub_string
;
586 memcpy (buf
, scrub_string
, copy
);
587 scrub_string
+= copy
;
591 /* Helper function of read_a_source_file, which tries to expand a macro. */
593 try_macro (char term
, const char *line
)
599 if (check_macro (line
, &out
, &err
, ¯o
))
603 *input_line_pointer
++ = term
;
604 input_scrub_include_sb (&out
,
605 input_line_pointer
, 1);
608 input_scrub_next_buffer (&input_line_pointer
);
610 md_macro_info (macro
);
618 /* Start a new instruction bundle. Returns the rs_align_code frag that
619 will be used to align the new bundle. */
623 fragS
*frag
= frag_now
;
625 frag_align_code (0, 0);
627 while (frag
->fr_type
!= rs_align_code
)
628 frag
= frag
->fr_next
;
630 gas_assert (frag
!= frag_now
);
635 /* Calculate the maximum size after relaxation of the region starting
636 at the given frag and extending through frag_now (which is unfinished). */
638 pending_bundle_size (fragS
*frag
)
640 unsigned int offset
= frag
->fr_fix
;
641 unsigned int size
= 0;
643 gas_assert (frag
!= frag_now
);
644 gas_assert (frag
->fr_type
== rs_align_code
);
646 while (frag
!= frag_now
)
648 /* This should only happen in what will later become an error case. */
652 size
+= frag
->fr_fix
;
653 if (frag
->fr_type
== rs_machine_dependent
)
654 size
+= md_frag_max_var (frag
);
656 frag
= frag
->fr_next
;
659 gas_assert (frag
== frag_now
);
660 size
+= frag_now_fix ();
661 if (frag
->fr_type
== rs_machine_dependent
)
662 size
+= md_frag_max_var (frag
);
664 gas_assert (size
>= offset
);
666 return size
- offset
;
669 /* Finish off the frag created to ensure bundle alignment. */
671 finish_bundle (fragS
*frag
, unsigned int size
)
673 gas_assert (bundle_align_p2
> 0);
674 gas_assert (frag
->fr_type
== rs_align_code
);
678 /* If there is more than a single byte, then we need to set up the
679 alignment frag. Otherwise we leave it at its initial state from
680 calling frag_align_code (0, 0), so that it does nothing. */
681 frag
->fr_offset
= bundle_align_p2
;
682 frag
->fr_subtype
= size
- 1;
685 /* We do this every time rather than just in s_bundle_align_mode
686 so that we catch any affected section without needing hooks all
687 over for all paths that do section changes. It's cheap enough. */
688 record_alignment (now_seg
, bundle_align_p2
- OCTETS_PER_BYTE_POWER
);
691 /* Assemble one instruction. This takes care of the bundle features
692 around calling md_assemble. */
694 assemble_one (char *line
)
696 fragS
*insn_start_frag
= NULL
;
698 if (bundle_lock_frchain
!= NULL
&& bundle_lock_frchain
!= frchain_now
)
700 as_bad (_("cannot change section or subsection inside .bundle_lock"));
701 /* Clearing this serves as a marker that we have already complained. */
702 bundle_lock_frchain
= NULL
;
705 if (bundle_lock_frchain
== NULL
&& bundle_align_p2
> 0)
706 insn_start_frag
= start_bundle ();
710 if (bundle_lock_frchain
!= NULL
)
712 /* Make sure this hasn't pushed the locked sequence
713 past the bundle size. */
714 unsigned int bundle_size
= pending_bundle_size (bundle_lock_frag
);
715 if (bundle_size
> (1U << bundle_align_p2
))
717 .bundle_lock sequence at %u bytes but .bundle_align_mode limit is %u bytes"),
718 bundle_size
, 1U << bundle_align_p2
);
720 else if (bundle_align_p2
> 0)
722 unsigned int insn_size
= pending_bundle_size (insn_start_frag
);
724 if (insn_size
> (1U << bundle_align_p2
))
726 single instruction is %u bytes long but .bundle_align_mode limit is %u"),
727 (unsigned int) insn_size
, 1U << bundle_align_p2
);
729 finish_bundle (insn_start_frag
, insn_size
);
733 #else /* !HANDLE_BUNDLE */
735 # define assemble_one(line) md_assemble(line)
737 #endif /* HANDLE_BUNDLE */
739 /* We read the file, putting things into a web that represents what we
740 have been reading. */
742 read_a_source_file (char *name
)
745 char *s
; /* String of symbol, '\0' appended. */
753 buffer
= input_scrub_new_file (name
);
756 listing_newline (NULL
);
757 register_dependency (name
);
759 /* Generate debugging information before we've read anything in to denote
760 this file as the "main" source file and not a subordinate one
761 (e.g. N_SO vs N_SOL in stabs). */
762 generate_file_debug ();
764 while ((buffer_limit
= input_scrub_next_buffer (&input_line_pointer
)) != 0)
765 { /* We have another line to parse. */
767 /* In order to avoid listing macro expansion lines with labels
768 multiple times, keep track of which line was last issued. */
769 static char *last_eol
;
773 while (input_line_pointer
< buffer_limit
)
775 bfd_boolean was_new_line
;
776 /* We have more of this buffer to parse. */
778 /* We now have input_line_pointer->1st char of next line.
779 If input_line_pointer [-1] == '\n' then we just
780 scanned another line: so bump line counters. */
781 was_new_line
= is_end_of_line
[(unsigned char) input_line_pointer
[-1]];
784 symbol_set_value_now (&dot_symbol
);
785 #ifdef md_start_line_hook
786 md_start_line_hook ();
788 if (input_line_pointer
[-1] == '\n')
789 bump_line_counters ();
793 /* If listing is on, and we are expanding a macro, then give
794 the listing code the contents of the expanded line. */
797 if ((listing
& LISTING_MACEXP
) && macro_nest
> 0)
799 /* Find the end of the current expanded macro line. */
800 s
= find_end_of_line (input_line_pointer
, flag_m68k_mri
);
808 /* Copy it for safe keeping. Also give an indication of
809 how much macro nesting is involved at this point. */
810 len
= s
- input_line_pointer
;
811 copy
= (char *) xmalloc (len
+ macro_nest
+ 2);
812 memset (copy
, '>', macro_nest
);
813 copy
[macro_nest
] = ' ';
814 memcpy (copy
+ macro_nest
+ 1, input_line_pointer
, len
);
815 copy
[macro_nest
+ 1 + len
] = '\0';
817 /* Install the line with the listing facility. */
818 listing_newline (copy
);
822 listing_newline (NULL
);
829 if (LABELS_WITHOUT_COLONS
|| flag_m68k_mri
)
831 /* Text at the start of a line must be a label, we
832 run down and stick a colon in. */
833 if (is_name_beginner (*input_line_pointer
))
835 char *line_start
= input_line_pointer
;
838 HANDLE_CONDITIONAL_ASSEMBLY (0);
840 c
= get_symbol_end ();
842 /* In MRI mode, the EQU and MACRO pseudoops must
843 be handled specially. */
847 char *rest
= input_line_pointer
+ 1;
851 if (*rest
== ' ' || *rest
== '\t')
853 if ((strncasecmp (rest
, "EQU", 3) == 0
854 || strncasecmp (rest
, "SET", 3) == 0)
855 && (rest
[3] == ' ' || rest
[3] == '\t'))
857 input_line_pointer
= rest
+ 3;
859 strncasecmp (rest
, "SET", 3) == 0);
862 if (strncasecmp (rest
, "MACRO", 5) == 0
865 || is_end_of_line
[(unsigned char) rest
[5]]))
869 /* In MRI mode, we need to handle the MACRO
870 pseudo-op specially: we don't want to put the
871 symbol in the symbol table. */
873 #ifdef TC_START_LABEL_WITHOUT_COLON
874 && TC_START_LABEL_WITHOUT_COLON(c
,
878 line_label
= colon (line_start
);
880 line_label
= symbol_create (line_start
,
885 *input_line_pointer
= c
;
887 input_line_pointer
++;
892 /* We are at the beginning of a line, or similar place.
893 We expect a well-formed assembler statement.
894 A "symbol-name:" is a statement.
896 Depending on what compiler is used, the order of these tests
897 may vary to catch most common case 1st.
898 Each test is independent of all other tests at the (top)
901 c
= *input_line_pointer
++;
902 while (c
== '\t' || c
== ' ' || c
== '\f');
904 /* C is the 1st significant character.
905 Input_line_pointer points after that character. */
906 if (is_name_beginner (c
))
908 /* Want user-defined label or pseudo/opcode. */
909 HANDLE_CONDITIONAL_ASSEMBLY (1);
911 s
= --input_line_pointer
;
912 c
= get_symbol_end (); /* name's delimiter. */
914 /* C is character after symbol.
915 That character's place in the input line is now '\0'.
916 S points to the beginning of the symbol.
917 [In case of pseudo-op, s->'.'.]
918 Input_line_pointer->'\0' where c was. */
919 if (TC_START_LABEL (c
, s
, input_line_pointer
))
923 char *rest
= input_line_pointer
+ 1;
925 /* In MRI mode, \tsym: set 0 is permitted. */
929 if (*rest
== ' ' || *rest
== '\t')
932 if ((strncasecmp (rest
, "EQU", 3) == 0
933 || strncasecmp (rest
, "SET", 3) == 0)
934 && (rest
[3] == ' ' || rest
[3] == '\t'))
936 input_line_pointer
= rest
+ 3;
942 line_label
= colon (s
); /* User-defined label. */
943 /* Put ':' back for error messages' sake. */
944 *input_line_pointer
++ = ':';
945 #ifdef tc_check_label
946 tc_check_label (line_label
);
948 /* Input_line_pointer->after ':'. */
951 else if ((c
== '=' && input_line_pointer
[1] == '=')
952 || ((c
== ' ' || c
== '\t')
953 && input_line_pointer
[1] == '='
954 && input_line_pointer
[2] == '='))
957 demand_empty_rest_of_line ();
960 || ((c
== ' ' || c
== '\t')
961 && input_line_pointer
[1] == '='))
962 #ifdef TC_EQUAL_IN_INSN
963 && !TC_EQUAL_IN_INSN (c
, s
)
968 demand_empty_rest_of_line ();
972 /* Expect pseudo-op or machine instruction. */
975 #ifndef TC_CASE_SENSITIVE
979 strncpy (original_case_string
, s2
, sizeof (original_case_string
));
980 original_case_string
[sizeof (original_case_string
) - 1] = 0;
989 if (NO_PSEUDO_DOT
|| flag_m68k_mri
)
991 /* The MRI assembler uses pseudo-ops without
993 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
);
994 if (pop
!= NULL
&& pop
->poc_handler
== NULL
)
999 || (!flag_m68k_mri
&& *s
== '.'))
1003 WARNING: c has next char, which may be end-of-line.
1004 We lookup the pseudo-op table with s+1 because we
1005 already know that the pseudo-op begins with a '.'. */
1008 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
+ 1);
1009 if (pop
&& !pop
->poc_handler
)
1012 /* In MRI mode, we may need to insert an
1013 automatic alignment directive. What a hack
1015 if (mri_pending_align
1017 || !((pop
->poc_handler
== cons
1018 && pop
->poc_val
== 1)
1019 || (pop
->poc_handler
== s_space
1020 && pop
->poc_val
== 1)
1021 #ifdef tc_conditional_pseudoop
1022 || tc_conditional_pseudoop (pop
)
1024 || pop
->poc_handler
== s_if
1025 || pop
->poc_handler
== s_ifdef
1026 || pop
->poc_handler
== s_ifc
1027 || pop
->poc_handler
== s_ifeqs
1028 || pop
->poc_handler
== s_else
1029 || pop
->poc_handler
== s_endif
1030 || pop
->poc_handler
== s_globl
1031 || pop
->poc_handler
== s_ignore
)))
1033 do_align (1, (char *) NULL
, 0, 0);
1034 mri_pending_align
= 0;
1036 if (line_label
!= NULL
)
1038 symbol_set_frag (line_label
, frag_now
);
1039 S_SET_VALUE (line_label
, frag_now_fix ());
1043 /* Print the error msg now, while we still can. */
1046 char *end
= input_line_pointer
;
1048 *input_line_pointer
= c
;
1050 c
= *--input_line_pointer
;
1051 *input_line_pointer
= '\0';
1052 if (! macro_defined
|| ! try_macro (c
, s
))
1055 as_bad (_("unknown pseudo-op: `%s'"), s
);
1056 *input_line_pointer
++ = c
;
1061 /* Put it back for error messages etc. */
1062 *input_line_pointer
= c
;
1063 /* The following skip of whitespace is compulsory.
1064 A well shaped space is sometimes all that separates
1065 keyword from operands. */
1066 if (c
== ' ' || c
== '\t')
1067 input_line_pointer
++;
1069 /* Input_line is restored.
1070 Input_line_pointer->1st non-blank char
1071 after pseudo-operation. */
1072 (*pop
->poc_handler
) (pop
->poc_val
);
1074 /* If that was .end, just get out now. */
1075 if (pop
->poc_handler
== s_end
)
1080 /* WARNING: c has char, which may be end-of-line. */
1081 /* Also: input_line_pointer->`\0` where c was. */
1082 *input_line_pointer
= c
;
1083 input_line_pointer
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 1, 0);
1084 c
= *input_line_pointer
;
1085 *input_line_pointer
= '\0';
1087 generate_lineno_debug ();
1089 if (macro_defined
&& try_macro (c
, s
))
1092 if (mri_pending_align
)
1094 do_align (1, (char *) NULL
, 0, 0);
1095 mri_pending_align
= 0;
1096 if (line_label
!= NULL
)
1098 symbol_set_frag (line_label
, frag_now
);
1099 S_SET_VALUE (line_label
, frag_now_fix ());
1103 assemble_one (s
); /* Assemble 1 instruction. */
1105 *input_line_pointer
++ = c
;
1107 /* We resume loop AFTER the end-of-line from
1108 this instruction. */
1114 /* Empty statement? */
1115 if (is_end_of_line
[(unsigned char) c
])
1118 if ((LOCAL_LABELS_DOLLAR
|| LOCAL_LABELS_FB
) && ISDIGIT (c
))
1120 /* local label ("4:") */
1121 char *backup
= input_line_pointer
;
1123 HANDLE_CONDITIONAL_ASSEMBLY (1);
1127 /* Read the whole number. */
1128 while (ISDIGIT (*input_line_pointer
))
1130 temp
= (temp
* 10) + *input_line_pointer
- '0';
1131 ++input_line_pointer
;
1134 if (LOCAL_LABELS_DOLLAR
1135 && *input_line_pointer
== '$'
1136 && *(input_line_pointer
+ 1) == ':')
1138 input_line_pointer
+= 2;
1140 if (dollar_label_defined (temp
))
1142 as_fatal (_("label \"%d$\" redefined"), temp
);
1145 define_dollar_label (temp
);
1146 colon (dollar_label_name (temp
, 0));
1151 && *input_line_pointer
++ == ':')
1153 fb_label_instance_inc (temp
);
1154 colon (fb_label_name (temp
, 0));
1158 input_line_pointer
= backup
;
1159 } /* local label ("4:") */
1161 if (c
&& strchr (line_comment_chars
, c
))
1162 { /* Its a comment. Better say APP or NO_APP. */
1167 unsigned int new_length
;
1170 s
= input_line_pointer
;
1171 if (strncmp (s
, "APP\n", 4))
1174 ignore_rest_of_line ();
1177 bump_line_counters ();
1180 ends
= strstr (s
, "#NO_APP\n");
1184 unsigned int tmp_len
;
1187 /* The end of the #APP wasn't in this buffer. We
1188 keep reading in buffers until we find the #NO_APP
1189 that goes with this #APP There is one. The specs
1191 tmp_len
= buffer_limit
- s
;
1192 tmp_buf
= (char *) xmalloc (tmp_len
+ 1);
1193 memcpy (tmp_buf
, s
, tmp_len
);
1196 new_tmp
= input_scrub_next_buffer (&buffer
);
1200 buffer_limit
= new_tmp
;
1201 input_line_pointer
= buffer
;
1202 ends
= strstr (buffer
, "#NO_APP\n");
1204 num
= ends
- buffer
;
1206 num
= buffer_limit
- buffer
;
1208 tmp_buf
= (char *) xrealloc (tmp_buf
, tmp_len
+ num
);
1209 memcpy (tmp_buf
+ tmp_len
, buffer
, num
);
1214 input_line_pointer
= ends
? ends
+ 8 : NULL
;
1222 input_line_pointer
= ends
+ 8;
1226 scrub_string_end
= ends
;
1228 new_length
= ends
- s
;
1229 new_buf
= (char *) xmalloc (new_length
);
1236 space
= (new_buf
+ new_length
) - new_tmp
;
1237 size
= do_scrub_chars (scrub_from_string
, new_tmp
, space
);
1245 new_buf
= (char *) xrealloc (new_buf
, new_length
+ 100);
1246 new_tmp
= new_buf
+ new_length
;
1253 /* We've "scrubbed" input to the preferred format. In the
1254 process we may have consumed the whole of the remaining
1255 file (and included files). We handle this formatted
1256 input similar to that of macro expansion, letting
1257 actual macro expansion (possibly nested) and other
1258 input expansion work. Beware that in messages, line
1259 numbers and possibly file names will be incorrect. */
1260 new_length
= strlen (new_buf
);
1261 sb_build (&sbuf
, new_length
);
1262 sb_add_buffer (&sbuf
, new_buf
, new_length
);
1263 input_scrub_include_sb (&sbuf
, input_line_pointer
, 0);
1265 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1270 HANDLE_CONDITIONAL_ASSEMBLY (1);
1272 #ifdef tc_unrecognized_line
1273 if (tc_unrecognized_line (c
))
1276 input_line_pointer
--;
1277 /* Report unknown char as error. */
1278 demand_empty_rest_of_line ();
1283 symbol_set_value_now (&dot_symbol
);
1285 #ifdef HANDLE_BUNDLE
1286 if (bundle_lock_frag
!= NULL
)
1288 as_bad_where (bundle_lock_frag
->fr_file
, bundle_lock_frag
->fr_line
,
1289 _(".bundle_lock with no matching .bundle_unlock"));
1290 bundle_lock_frag
= NULL
;
1291 bundle_lock_frchain
= NULL
;
1292 bundle_lock_depth
= 0;
1299 /* Close the input file. */
1300 input_scrub_close ();
1301 #ifdef WARN_COMMENTS
1303 if (warn_comment
&& found_comment
)
1304 as_warn_where (found_comment_file
, found_comment
,
1305 "first comment found here");
1310 /* Convert O_constant expression EXP into the equivalent O_big representation.
1311 Take the sign of the number from SIGN rather than X_add_number. */
1314 convert_to_bignum (expressionS
*exp
, int sign
)
1319 value
= exp
->X_add_number
;
1320 for (i
= 0; i
< sizeof (exp
->X_add_number
) / CHARS_PER_LITTLENUM
; i
++)
1322 generic_bignum
[i
] = value
& LITTLENUM_MASK
;
1323 value
>>= LITTLENUM_NUMBER_OF_BITS
;
1325 /* Add a sequence of sign bits if the top bit of X_add_number is not
1326 the sign of the original value. */
1327 if ((exp
->X_add_number
< 0) == !sign
)
1328 generic_bignum
[i
++] = sign
? LITTLENUM_MASK
: 0;
1330 exp
->X_add_number
= i
;
1333 /* For most MRI pseudo-ops, the line actually ends at the first
1334 nonquoted space. This function looks for that point, stuffs a null
1335 in, and sets *STOPCP to the character that used to be there, and
1336 returns the location.
1338 Until I hear otherwise, I am going to assume that this is only true
1339 for the m68k MRI assembler. */
1342 mri_comment_field (char *stopcp
)
1348 know (flag_m68k_mri
);
1350 for (s
= input_line_pointer
;
1351 ((!is_end_of_line
[(unsigned char) *s
] && *s
!= ' ' && *s
!= '\t')
1359 for (s
= input_line_pointer
;
1360 !is_end_of_line
[(unsigned char) *s
];
1370 /* Skip to the end of an MRI comment field. */
1373 mri_comment_end (char *stop
, int stopc
)
1377 input_line_pointer
= stop
;
1379 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1380 ++input_line_pointer
;
1384 s_abort (int ignore ATTRIBUTE_UNUSED
)
1386 as_fatal (_(".abort detected. Abandoning ship."));
1389 /* Guts of .align directive. N is the power of two to which to align.
1390 FILL may be NULL, or it may point to the bytes of the fill pattern.
1391 LEN is the length of whatever FILL points to, if anything. MAX is
1392 the maximum number of characters to skip when doing the alignment,
1393 or 0 if there is no maximum. */
1396 do_align (int n
, char *fill
, int len
, int max
)
1398 if (now_seg
== absolute_section
)
1402 if (*fill
++ != '\0')
1404 as_warn (_("ignoring fill value in absolute section"));
1411 #ifdef md_flush_pending_output
1412 md_flush_pending_output ();
1415 md_do_align (n
, fill
, len
, max
, just_record_alignment
);
1418 /* Only make a frag if we HAVE to... */
1419 if (n
!= 0 && !need_pass_2
)
1423 if (subseg_text_p (now_seg
))
1424 frag_align_code (n
, max
);
1426 frag_align (n
, 0, max
);
1429 frag_align (n
, *fill
, max
);
1431 frag_align_pattern (n
, fill
, len
, max
);
1435 just_record_alignment
: ATTRIBUTE_UNUSED_LABEL
1438 record_alignment (now_seg
, n
- OCTETS_PER_BYTE_POWER
);
1441 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1442 (in bytes). A negative ARG is the negative of the length of the
1443 fill pattern. BYTES_P is non-zero if the alignment value should be
1444 interpreted as the byte boundary, rather than the power of 2. */
1445 #ifndef TC_ALIGN_LIMIT
1446 #define TC_ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1450 s_align (int arg
, int bytes_p
)
1452 unsigned int align_limit
= TC_ALIGN_LIMIT
;
1461 stop
= mri_comment_field (&stopc
);
1463 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1468 align
= arg
; /* Default value from pseudo-op table. */
1472 align
= get_absolute_expression ();
1475 #ifdef TC_ALIGN_ZERO_IS_DEFAULT
1476 if (arg
> 0 && align
== 0)
1483 /* Convert to a power of 2. */
1488 for (i
= 0; (align
& 1) == 0; align
>>= 1, ++i
)
1491 as_bad (_("alignment not a power of 2"));
1497 if (align
> align_limit
)
1499 align
= align_limit
;
1500 as_warn (_("alignment too large: %u assumed"), align
);
1503 if (*input_line_pointer
!= ',')
1510 ++input_line_pointer
;
1511 if (*input_line_pointer
== ',')
1515 fill
= get_absolute_expression ();
1520 if (*input_line_pointer
!= ',')
1524 ++input_line_pointer
;
1525 max
= get_absolute_expression ();
1532 as_warn (_("expected fill pattern missing"));
1533 do_align (align
, (char *) NULL
, 0, max
);
1548 do_align (align
, &fill_char
, fill_len
, max
);
1554 if ((size_t) fill_len
> sizeof ab
)
1556 md_number_to_chars (ab
, fill
, fill_len
);
1557 do_align (align
, ab
, fill_len
, max
);
1561 demand_empty_rest_of_line ();
1564 mri_comment_end (stop
, stopc
);
1567 /* Handle the .align pseudo-op on machines where ".align 4" means
1568 align to a 4 byte boundary. */
1571 s_align_bytes (int arg
)
1576 /* Handle the .align pseudo-op on machines where ".align 4" means align
1577 to a 2**4 boundary. */
1580 s_align_ptwo (int arg
)
1585 /* Switch in and out of alternate macro mode. */
1590 demand_empty_rest_of_line ();
1591 macro_set_alternate (on
);
1594 /* Read a symbol name from input_line_pointer.
1596 Stores the symbol name in a buffer and returns a pointer to this buffer.
1597 The buffer is xalloc'ed. It is the caller's responsibility to free
1600 The name is not left in the i_l_p buffer as it may need processing
1601 to handle escape characters.
1603 Advances i_l_p to the next non-whitespace character.
1605 If a symbol name could not be read, the routine issues an error
1606 messages, skips to the end of the line and returns NULL. */
1609 read_symbol_name (void)
1615 c
= *input_line_pointer
++;
1619 #define SYM_NAME_CHUNK_LEN 128
1620 ptrdiff_t len
= SYM_NAME_CHUNK_LEN
;
1624 start
= name
= xmalloc (len
+ 1);
1626 name_end
= name
+ SYM_NAME_CHUNK_LEN
;
1628 while (is_a_char (C
= next_char_of_string ()))
1630 if (name
>= name_end
)
1634 sofar
= name
- start
;
1635 len
+= SYM_NAME_CHUNK_LEN
;
1636 start
= xrealloc (start
, len
+ 1);
1637 name_end
= start
+ len
;
1638 name
= start
+ sofar
;
1645 /* Since quoted symbol names can contain non-ASCII characters,
1646 check the string and warn if it cannot be recognised by the
1647 current character set. */
1648 if (mbstowcs (NULL
, name
, len
) == (size_t) -1)
1649 as_warn (_("symbol name not recognised in the current locale"));
1651 else if (is_name_beginner (c
) || c
== '\001')
1655 name
= input_line_pointer
- 1;
1657 /* We accept \001 in a name in case this is
1658 being called with a constructed string. */
1659 while (is_part_of_name (c
= *input_line_pointer
++)
1663 len
= (input_line_pointer
- name
) - 1;
1664 start
= xmalloc (len
+ 1);
1666 memcpy (start
, name
, len
);
1669 /* Skip a name ender char if one is present. */
1670 if (! is_name_ender (c
))
1671 --input_line_pointer
;
1674 name
= start
= NULL
;
1678 as_bad (_("expected symbol name"));
1679 ignore_rest_of_line ();
1690 s_comm_internal (int param
,
1691 symbolS
*(*comm_parse_extra
) (int, symbolS
*, addressT
))
1695 symbolS
*symbolP
= NULL
;
1701 stop
= mri_comment_field (&stopc
);
1703 if ((name
= read_symbol_name ()) == NULL
)
1706 /* Accept an optional comma after the name. The comma used to be
1707 required, but Irix 5 cc does not generate it for .lcomm. */
1708 if (*input_line_pointer
== ',')
1709 input_line_pointer
++;
1711 temp
= get_absolute_expr (&exp
);
1713 size
&= ((addressT
) 2 << (stdoutput
->arch_info
->bits_per_address
- 1)) - 1;
1714 if (exp
.X_op
== O_absent
)
1716 as_bad (_("missing size expression"));
1717 ignore_rest_of_line ();
1720 else if (temp
!= size
|| !exp
.X_unsigned
)
1722 as_warn (_("size (%ld) out of range, ignored"), (long) temp
);
1723 ignore_rest_of_line ();
1727 symbolP
= symbol_find_or_make (name
);
1728 if ((S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
1729 && !S_IS_COMMON (symbolP
))
1731 if (!S_IS_VOLATILE (symbolP
))
1734 as_bad (_("symbol `%s' is already defined"), name
);
1735 ignore_rest_of_line ();
1738 symbolP
= symbol_clone (symbolP
, 1);
1739 S_SET_SEGMENT (symbolP
, undefined_section
);
1740 S_SET_VALUE (symbolP
, 0);
1741 symbol_set_frag (symbolP
, &zero_address_frag
);
1742 S_CLEAR_VOLATILE (symbolP
);
1745 size
= S_GET_VALUE (symbolP
);
1748 else if (size
!= temp
)
1749 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1750 name
, (long) size
, (long) temp
);
1752 if (comm_parse_extra
!= NULL
)
1753 symbolP
= (*comm_parse_extra
) (param
, symbolP
, size
);
1756 S_SET_VALUE (symbolP
, (valueT
) size
);
1757 S_SET_EXTERNAL (symbolP
);
1758 S_SET_SEGMENT (symbolP
, bfd_com_section_ptr
);
1761 demand_empty_rest_of_line ();
1764 mri_comment_end (stop
, stopc
);
1773 s_comm_internal (ignore
, NULL
);
1776 /* The MRI COMMON pseudo-op. We handle this by creating a common
1777 symbol with the appropriate name. We make s_space do the right
1778 thing by increasing the size. */
1781 s_mri_common (int small ATTRIBUTE_UNUSED
)
1797 stop
= mri_comment_field (&stopc
);
1801 name
= input_line_pointer
;
1802 if (!ISDIGIT (*name
))
1803 c
= get_symbol_end ();
1808 ++input_line_pointer
;
1810 while (ISDIGIT (*input_line_pointer
));
1812 c
= *input_line_pointer
;
1813 *input_line_pointer
= '\0';
1815 if (line_label
!= NULL
)
1817 alc
= (char *) xmalloc (strlen (S_GET_NAME (line_label
))
1818 + (input_line_pointer
- name
)
1820 sprintf (alc
, "%s%s", name
, S_GET_NAME (line_label
));
1825 sym
= symbol_find_or_make (name
);
1826 *input_line_pointer
= c
;
1830 if (*input_line_pointer
!= ',')
1834 ++input_line_pointer
;
1835 align
= get_absolute_expression ();
1838 if (S_IS_DEFINED (sym
) && !S_IS_COMMON (sym
))
1840 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym
));
1841 ignore_rest_of_line ();
1842 mri_comment_end (stop
, stopc
);
1846 S_SET_EXTERNAL (sym
);
1847 S_SET_SEGMENT (sym
, bfd_com_section_ptr
);
1848 mri_common_symbol
= sym
;
1852 S_SET_ALIGN (sym
, align
);
1857 if (line_label
!= NULL
)
1860 exp
.X_op
= O_symbol
;
1861 exp
.X_add_symbol
= sym
;
1862 exp
.X_add_number
= 0;
1863 symbol_set_value_expression (line_label
, &exp
);
1864 symbol_set_frag (line_label
, &zero_address_frag
);
1865 S_SET_SEGMENT (line_label
, expr_section
);
1868 /* FIXME: We just ignore the small argument, which distinguishes
1869 COMMON and COMMON.S. I don't know what we can do about it. */
1871 /* Ignore the type and hptype. */
1872 if (*input_line_pointer
== ',')
1873 input_line_pointer
+= 2;
1874 if (*input_line_pointer
== ',')
1875 input_line_pointer
+= 2;
1877 demand_empty_rest_of_line ();
1879 mri_comment_end (stop
, stopc
);
1883 s_data (int ignore ATTRIBUTE_UNUSED
)
1888 temp
= get_absolute_expression ();
1889 if (flag_readonly_data_in_text
)
1891 section
= text_section
;
1895 section
= data_section
;
1897 subseg_set (section
, (subsegT
) temp
);
1899 demand_empty_rest_of_line ();
1902 /* Handle the .appfile pseudo-op. This is automatically generated by
1903 do_scrub_chars when a preprocessor # line comment is seen with a
1904 file name. This default definition may be overridden by the object
1905 or CPU specific pseudo-ops. This function is also the default
1906 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1910 s_app_file_string (char *file
, int appfile ATTRIBUTE_UNUSED
)
1914 listing_source_file (file
);
1916 register_dependency (file
);
1918 obj_app_file (file
, appfile
);
1923 s_app_file (int appfile
)
1928 /* Some assemblers tolerate immediately following '"'. */
1929 if ((s
= demand_copy_string (&length
)) != 0)
1932 = (!new_logical_line_flags (s
, -1, 1) && appfile
);
1934 /* In MRI mode, the preprocessor may have inserted an extraneous
1937 && *input_line_pointer
== '\''
1938 && is_end_of_line
[(unsigned char) input_line_pointer
[1]])
1939 ++input_line_pointer
;
1941 demand_empty_rest_of_line ();
1943 s_app_file_string (s
, appfile
);
1948 get_linefile_number (int *flag
)
1952 if (*input_line_pointer
< '0' || *input_line_pointer
> '9')
1955 *flag
= get_absolute_expression ();
1960 /* Handle the .appline pseudo-op. This is automatically generated by
1961 do_scrub_chars when a preprocessor # line comment is seen. This
1962 default definition may be overridden by the object or CPU specific
1966 s_app_line (int appline
)
1971 /* The given number is that of the next line. */
1973 l
= get_absolute_expression ();
1974 else if (!get_linefile_number (&l
))
1976 ignore_rest_of_line ();
1983 /* Some of the back ends can't deal with non-positive line numbers.
1984 Besides, it's silly. GCC however will generate a line number of
1985 zero when it is pre-processing builtins for assembler-with-cpp files:
1989 We do not want to barf on this, especially since such files are used
1990 in the GCC and GDB testsuites. So we check for negative line numbers
1991 rather than non-positive line numbers. */
1992 as_warn (_("line numbers must be positive; line number %d rejected"),
2003 if (*input_line_pointer
== '"')
2004 file
= demand_copy_string (&length
);
2010 while (get_linefile_number (&this_flag
))
2013 /* From GCC's cpp documentation:
2014 1: start of a new file.
2015 2: returning to a file after having included
2017 3: following text comes from a system header file.
2018 4: following text should be treated as extern "C".
2020 4 is nonsensical for the assembler; 3, we don't
2021 care about, so we ignore it just in case a
2022 system header file is included while
2023 preprocessing assembly. So 1 and 2 are all we
2024 care about, and they are mutually incompatible.
2025 new_logical_line_flags() demands this. */
2028 if (flags
&& flags
!= (1 << this_flag
))
2029 as_warn (_("incompatible flag %i in line directive"),
2032 flags
|= 1 << this_flag
;
2037 /* We ignore these. */
2041 as_warn (_("unsupported flag %i in line directive"),
2046 if (!is_end_of_line
[(unsigned char)*input_line_pointer
])
2051 if (appline
|| file
)
2053 new_logical_line_flags (file
, l
, flags
);
2056 listing_source_line (l
);
2060 if (appline
|| file
)
2061 demand_empty_rest_of_line ();
2063 ignore_rest_of_line ();
2066 /* Handle the .end pseudo-op. Actually, the real work is done in
2067 read_a_source_file. */
2070 s_end (int ignore ATTRIBUTE_UNUSED
)
2074 /* The MRI assembler permits the start symbol to follow .end,
2075 but we don't support that. */
2077 if (!is_end_of_line
[(unsigned char) *input_line_pointer
]
2078 && *input_line_pointer
!= '*'
2079 && *input_line_pointer
!= '!')
2080 as_warn (_("start address not supported"));
2084 /* Handle the .err pseudo-op. */
2087 s_err (int ignore ATTRIBUTE_UNUSED
)
2089 as_bad (_(".err encountered"));
2090 demand_empty_rest_of_line ();
2093 /* Handle the .error and .warning pseudo-ops. */
2099 /* The purpose for the conditional assignment is not to
2100 internationalize the directive itself, but that we need a
2101 self-contained message, one that can be passed like the
2102 demand_copy_C_string return value, and with no assumption on the
2103 location of the name of the directive within the message. */
2105 = (err
? _(".error directive invoked in source file")
2106 : _(".warning directive invoked in source file"));
2108 if (!is_it_end_of_statement ())
2110 if (*input_line_pointer
!= '\"')
2112 as_bad (_("%s argument must be a string"),
2113 err
? ".error" : ".warning");
2114 ignore_rest_of_line ();
2118 msg
= demand_copy_C_string (&len
);
2126 as_warn ("%s", msg
);
2127 demand_empty_rest_of_line ();
2130 /* Handle the MRI fail pseudo-op. */
2133 s_fail (int ignore ATTRIBUTE_UNUSED
)
2140 stop
= mri_comment_field (&stopc
);
2142 temp
= get_absolute_expression ();
2144 as_warn (_(".fail %ld encountered"), (long) temp
);
2146 as_bad (_(".fail %ld encountered"), (long) temp
);
2148 demand_empty_rest_of_line ();
2151 mri_comment_end (stop
, stopc
);
2155 s_fill (int ignore ATTRIBUTE_UNUSED
)
2157 expressionS rep_exp
;
2162 #ifdef md_flush_pending_output
2163 md_flush_pending_output ();
2166 #ifdef md_cons_align
2170 get_known_segmented_expression (&rep_exp
);
2171 if (*input_line_pointer
== ',')
2173 input_line_pointer
++;
2174 size
= get_absolute_expression ();
2175 if (*input_line_pointer
== ',')
2177 input_line_pointer
++;
2178 fill
= get_absolute_expression ();
2182 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
2183 #define BSD_FILL_SIZE_CROCK_8 (8)
2184 if (size
> BSD_FILL_SIZE_CROCK_8
)
2186 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8
);
2187 size
= BSD_FILL_SIZE_CROCK_8
;
2191 as_warn (_("size negative; .fill ignored"));
2194 else if (rep_exp
.X_op
== O_constant
&& rep_exp
.X_add_number
<= 0)
2196 if (rep_exp
.X_add_number
< 0)
2197 as_warn (_("repeat < 0; .fill ignored"));
2201 if (size
&& !need_pass_2
)
2203 if (rep_exp
.X_op
== O_constant
)
2205 p
= frag_var (rs_fill
, (int) size
, (int) size
,
2206 (relax_substateT
) 0, (symbolS
*) 0,
2207 (offsetT
) rep_exp
.X_add_number
,
2212 /* We don't have a constant repeat count, so we can't use
2213 rs_fill. We can get the same results out of rs_space,
2214 but its argument is in bytes, so we must multiply the
2215 repeat count by size. */
2218 rep_sym
= make_expr_symbol (&rep_exp
);
2221 expressionS size_exp
;
2222 size_exp
.X_op
= O_constant
;
2223 size_exp
.X_add_number
= size
;
2225 rep_exp
.X_op
= O_multiply
;
2226 rep_exp
.X_add_symbol
= rep_sym
;
2227 rep_exp
.X_op_symbol
= make_expr_symbol (&size_exp
);
2228 rep_exp
.X_add_number
= 0;
2229 rep_sym
= make_expr_symbol (&rep_exp
);
2232 p
= frag_var (rs_space
, (int) size
, (int) size
,
2233 (relax_substateT
) 0, rep_sym
, (offsetT
) 0, (char *) 0);
2236 memset (p
, 0, (unsigned int) size
);
2238 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
2239 flavoured AS. The following bizarre behaviour is to be
2240 compatible with above. I guess they tried to take up to 8
2241 bytes from a 4-byte expression and they forgot to sign
2243 #define BSD_FILL_SIZE_CROCK_4 (4)
2244 md_number_to_chars (p
, (valueT
) fill
,
2245 (size
> BSD_FILL_SIZE_CROCK_4
2246 ? BSD_FILL_SIZE_CROCK_4
2248 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
2249 but emits no error message because it seems a legal thing to do.
2250 It is a degenerate case of .fill but could be emitted by a
2253 demand_empty_rest_of_line ();
2257 s_globl (int ignore ATTRIBUTE_UNUSED
)
2266 stop
= mri_comment_field (&stopc
);
2270 if ((name
= read_symbol_name ()) == NULL
)
2273 symbolP
= symbol_find_or_make (name
);
2274 S_SET_EXTERNAL (symbolP
);
2277 c
= *input_line_pointer
;
2280 input_line_pointer
++;
2282 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
2290 demand_empty_rest_of_line ();
2293 mri_comment_end (stop
, stopc
);
2296 /* Handle the MRI IRP and IRPC pseudo-ops. */
2307 as_where (&file
, &line
);
2309 eol
= find_end_of_line (input_line_pointer
, 0);
2310 sb_build (&s
, eol
- input_line_pointer
);
2311 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2312 input_line_pointer
= eol
;
2316 err
= expand_irp (irpc
, 0, &s
, &out
, get_non_macro_line_sb
);
2318 as_bad_where (file
, line
, "%s", err
);
2322 input_scrub_include_sb (&out
, input_line_pointer
, 1);
2324 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2327 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2328 the section to only be linked once. However, this is not supported
2329 by most object file formats. This takes an optional argument,
2330 which is what to do about duplicates. */
2333 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
2335 enum linkonce_type type
;
2339 type
= LINKONCE_DISCARD
;
2341 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
2346 s
= input_line_pointer
;
2347 c
= get_symbol_end ();
2348 if (strcasecmp (s
, "discard") == 0)
2349 type
= LINKONCE_DISCARD
;
2350 else if (strcasecmp (s
, "one_only") == 0)
2351 type
= LINKONCE_ONE_ONLY
;
2352 else if (strcasecmp (s
, "same_size") == 0)
2353 type
= LINKONCE_SAME_SIZE
;
2354 else if (strcasecmp (s
, "same_contents") == 0)
2355 type
= LINKONCE_SAME_CONTENTS
;
2357 as_warn (_("unrecognized .linkonce type `%s'"), s
);
2359 *input_line_pointer
= c
;
2362 #ifdef obj_handle_link_once
2363 obj_handle_link_once (type
);
2364 #else /* ! defined (obj_handle_link_once) */
2368 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
2369 as_warn (_(".linkonce is not supported for this object file format"));
2371 flags
= bfd_get_section_flags (stdoutput
, now_seg
);
2372 flags
|= SEC_LINK_ONCE
;
2377 case LINKONCE_DISCARD
:
2378 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
2380 case LINKONCE_ONE_ONLY
:
2381 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
2383 case LINKONCE_SAME_SIZE
:
2384 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
2386 case LINKONCE_SAME_CONTENTS
:
2387 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
2390 if (!bfd_set_section_flags (stdoutput
, now_seg
, flags
))
2391 as_bad (_("bfd_set_section_flags: %s"),
2392 bfd_errmsg (bfd_get_error ()));
2394 #endif /* ! defined (obj_handle_link_once) */
2396 demand_empty_rest_of_line ();
2400 bss_alloc (symbolS
*symbolP
, addressT size
, int align
)
2403 segT current_seg
= now_seg
;
2404 subsegT current_subseg
= now_subseg
;
2405 segT bss_seg
= bss_section
;
2407 #if defined (TC_MIPS) || defined (TC_ALPHA)
2408 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
2409 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
2411 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2412 if (size
<= bfd_get_gp_size (stdoutput
))
2414 bss_seg
= subseg_new (".sbss", 1);
2415 seg_info (bss_seg
)->bss
= 1;
2416 if (!bfd_set_section_flags (stdoutput
, bss_seg
, SEC_ALLOC
))
2417 as_warn (_("error setting flags for \".sbss\": %s"),
2418 bfd_errmsg (bfd_get_error ()));
2422 subseg_set (bss_seg
, 1);
2426 record_alignment (bss_seg
, align
);
2427 frag_align (align
, 0, 0);
2430 /* Detach from old frag. */
2431 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2432 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2434 symbol_set_frag (symbolP
, frag_now
);
2435 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
, NULL
);
2439 S_SET_SIZE (symbolP
, size
);
2441 S_SET_SEGMENT (symbolP
, bss_seg
);
2444 /* The symbol may already have been created with a preceding
2445 ".globl" directive -- be careful not to step on storage class
2446 in that case. Otherwise, set it to static. */
2447 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2448 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2449 #endif /* OBJ_COFF */
2451 subseg_set (current_seg
, current_subseg
);
2455 parse_align (int align_bytes
)
2461 if (*input_line_pointer
!= ',')
2464 as_bad (_("expected alignment after size"));
2465 ignore_rest_of_line ();
2469 input_line_pointer
++;
2472 align
= get_absolute_expr (&exp
);
2473 if (exp
.X_op
== O_absent
)
2476 if (!exp
.X_unsigned
)
2478 as_warn (_("alignment negative; 0 assumed"));
2482 if (align_bytes
&& align
!= 0)
2484 /* convert to a power of 2 alignment */
2485 unsigned int alignp2
= 0;
2486 while ((align
& 1) == 0)
2487 align
>>= 1, ++alignp2
;
2490 as_bad (_("alignment not a power of 2"));
2491 ignore_rest_of_line ();
2499 /* Called from s_comm_internal after symbol name and size have been
2500 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2501 1 if this was a ".bss" directive which has a 3rd argument
2502 (alignment as a power of 2), or 2 if this was a ".bss" directive
2503 with alignment in bytes. */
2506 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2512 align
= parse_align (needs_align
- 1);
2513 if (align
== (addressT
) -1)
2517 /* Assume some objects may require alignment on some systems. */
2518 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2520 bss_alloc (symbolP
, size
, align
);
2525 s_lcomm (int needs_align
)
2527 s_comm_internal (needs_align
, s_lcomm_internal
);
2531 s_lcomm_bytes (int needs_align
)
2533 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2537 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2543 /* We permit ANY defined expression: BSD4.2 demands constants. */
2544 if ((name
= read_symbol_name ()) == NULL
)
2547 if (*input_line_pointer
!= ',')
2549 as_bad (_("expected comma after \"%s\""), name
);
2553 input_line_pointer
++;
2554 expression_and_evaluate (&exp
);
2556 if (exp
.X_op
!= O_constant
2557 && exp
.X_op
!= O_register
)
2559 as_bad (_("bad expression"));
2563 symbolP
= symbol_find_or_make (name
);
2565 if (S_GET_SEGMENT (symbolP
) == undefined_section
)
2567 /* The name might be an undefined .global symbol; be sure to
2568 keep the "external" bit. */
2569 S_SET_SEGMENT (symbolP
,
2570 (exp
.X_op
== O_constant
2573 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2577 as_bad (_("symbol `%s' is already defined"), name
);
2580 demand_empty_rest_of_line ();
2585 ignore_rest_of_line ();
2590 /* Read a line into an sb. Returns the character that ended the line
2591 or zero if there are no more lines. */
2594 get_line_sb (sb
*line
, int in_macro
)
2598 if (input_line_pointer
[-1] == '\n')
2599 bump_line_counters ();
2601 if (input_line_pointer
>= buffer_limit
)
2603 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2604 if (buffer_limit
== 0)
2608 eol
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 0, in_macro
);
2609 sb_add_buffer (line
, input_line_pointer
, eol
- input_line_pointer
);
2610 input_line_pointer
= eol
;
2612 /* Don't skip multiple end-of-line characters, because that breaks support
2613 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2614 characters but isn't. Instead just skip one end of line character and
2615 return the character skipped so that the caller can re-insert it if
2617 return *input_line_pointer
++;
2621 get_non_macro_line_sb (sb
*line
)
2623 return get_line_sb (line
, 0);
2627 get_macro_line_sb (sb
*line
)
2629 return get_line_sb (line
, 1);
2632 /* Define a macro. This is an interface to macro.c. */
2635 s_macro (int ignore ATTRIBUTE_UNUSED
)
2643 as_where (&file
, &line
);
2645 eol
= find_end_of_line (input_line_pointer
, 0);
2646 sb_build (&s
, eol
- input_line_pointer
);
2647 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2648 input_line_pointer
= eol
;
2650 if (line_label
!= NULL
)
2655 name
= S_GET_NAME (line_label
);
2656 len
= strlen (name
);
2657 sb_build (&label
, len
);
2658 sb_add_buffer (&label
, name
, len
);
2659 err
= define_macro (0, &s
, &label
, get_macro_line_sb
, file
, line
, &name
);
2663 err
= define_macro (0, &s
, NULL
, get_macro_line_sb
, file
, line
, &name
);
2665 as_bad_where (file
, line
, err
, name
);
2668 if (line_label
!= NULL
)
2670 S_SET_SEGMENT (line_label
, absolute_section
);
2671 S_SET_VALUE (line_label
, 0);
2672 symbol_set_frag (line_label
, &zero_address_frag
);
2675 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2676 && hash_find (po_hash
, name
) != NULL
)
2679 && hash_find (po_hash
, name
+ 1) != NULL
))
2680 as_warn_where (file
,
2682 _("attempt to redefine pseudo-op `%s' ignored"),
2689 /* Handle the .mexit pseudo-op, which immediately exits a macro
2693 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2697 cond_exit_macro (macro_nest
);
2698 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2701 as_warn (_("ignoring macro exit outside a macro definition."));
2704 /* Switch in and out of MRI mode. */
2707 s_mri (int ignore ATTRIBUTE_UNUSED
)
2710 #ifdef MRI_MODE_CHANGE
2714 on
= get_absolute_expression ();
2715 #ifdef MRI_MODE_CHANGE
2716 old_flag
= flag_mri
;
2735 /* Operator precedence changes in m68k MRI mode, so we need to
2736 update the operator rankings. */
2737 expr_set_precedence ();
2739 #ifdef MRI_MODE_CHANGE
2741 MRI_MODE_CHANGE (on
);
2744 demand_empty_rest_of_line ();
2747 /* Handle changing the location counter. */
2750 do_org (segT segment
, expressionS
*exp
, int fill
)
2752 if (segment
!= now_seg
2753 && segment
!= absolute_section
2754 && segment
!= expr_section
)
2755 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2757 if (now_seg
== absolute_section
)
2760 as_warn (_("ignoring fill value in absolute section"));
2761 if (exp
->X_op
!= O_constant
)
2763 as_bad (_("only constant offsets supported in absolute section"));
2764 exp
->X_add_number
= 0;
2766 abs_section_offset
= exp
->X_add_number
;
2771 symbolS
*sym
= exp
->X_add_symbol
;
2772 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2774 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2776 /* Handle complex expressions. */
2777 sym
= make_expr_symbol (exp
);
2781 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2787 s_org (int ignore ATTRIBUTE_UNUSED
)
2793 #ifdef md_flush_pending_output
2794 md_flush_pending_output ();
2797 /* The m68k MRI assembler has a different meaning for .org. It
2798 means to create an absolute section at a given address. We can't
2799 support that--use a linker script instead. */
2802 as_bad (_("MRI style ORG pseudo-op not supported"));
2803 ignore_rest_of_line ();
2807 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2808 thing as a sub-segment-relative origin. Any absolute origin is
2809 given a warning, then assumed to be segment-relative. Any
2810 segmented origin expression ("foo+42") had better be in the right
2811 segment or the .org is ignored.
2813 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2814 we never know sub-segment sizes when we are reading code. BSD
2815 will crash trying to emit negative numbers of filler bytes in
2816 certain .orgs. We don't crash, but see as-write for that code.
2818 Don't make frag if need_pass_2==1. */
2819 segment
= get_known_segmented_expression (&exp
);
2820 if (*input_line_pointer
== ',')
2822 input_line_pointer
++;
2823 temp_fill
= get_absolute_expression ();
2829 do_org (segment
, &exp
, temp_fill
);
2831 demand_empty_rest_of_line ();
2834 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2835 called by the obj-format routine which handles section changing
2836 when in MRI mode. It will create a new section, and return it. It
2837 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2838 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2841 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2851 name
= input_line_pointer
;
2852 if (!ISDIGIT (*name
))
2853 c
= get_symbol_end ();
2858 ++input_line_pointer
;
2860 while (ISDIGIT (*input_line_pointer
));
2862 c
= *input_line_pointer
;
2863 *input_line_pointer
= '\0';
2866 name
= xstrdup (name
);
2868 *input_line_pointer
= c
;
2870 seg
= subseg_new (name
, 0);
2872 if (*input_line_pointer
== ',')
2876 ++input_line_pointer
;
2877 align
= get_absolute_expression ();
2878 record_alignment (seg
, align
);
2882 if (*input_line_pointer
== ',')
2884 c
= *++input_line_pointer
;
2886 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
2889 as_bad (_("unrecognized section type"));
2890 ++input_line_pointer
;
2895 flags
= SEC_NO_FLAGS
;
2897 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
2898 else if (*type
== 'D' || *type
== 'M')
2899 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
2900 else if (*type
== 'R')
2901 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
2902 if (flags
!= SEC_NO_FLAGS
)
2904 if (!bfd_set_section_flags (stdoutput
, seg
, flags
))
2905 as_warn (_("error setting flags for \"%s\": %s"),
2906 bfd_section_name (stdoutput
, seg
),
2907 bfd_errmsg (bfd_get_error ()));
2912 /* Ignore the HP type. */
2913 if (*input_line_pointer
== ',')
2914 input_line_pointer
+= 2;
2916 demand_empty_rest_of_line ();
2918 #else /* ! TC_M68K */
2927 name
= input_line_pointer
;
2928 c
= get_symbol_end ();
2930 name
= xstrdup (name
);
2932 *input_line_pointer
= c
;
2934 seg
= subseg_new (name
, 0);
2936 if (*input_line_pointer
!= ',')
2942 ++input_line_pointer
;
2944 sectype
= input_line_pointer
;
2945 c
= get_symbol_end ();
2946 if (*sectype
== '\0')
2948 else if (strcasecmp (sectype
, "text") == 0)
2950 else if (strcasecmp (sectype
, "data") == 0)
2952 else if (strcasecmp (sectype
, "romdata") == 0)
2955 as_warn (_("unrecognized section type `%s'"), sectype
);
2956 *input_line_pointer
= c
;
2959 if (*input_line_pointer
== ',')
2963 ++input_line_pointer
;
2965 seccmd
= input_line_pointer
;
2966 c
= get_symbol_end ();
2967 if (strcasecmp (seccmd
, "absolute") == 0)
2969 as_bad (_("absolute sections are not supported"));
2970 *input_line_pointer
= c
;
2971 ignore_rest_of_line ();
2974 else if (strcasecmp (seccmd
, "align") == 0)
2978 *input_line_pointer
= c
;
2979 align
= get_absolute_expression ();
2980 record_alignment (seg
, align
);
2984 as_warn (_("unrecognized section command `%s'"), seccmd
);
2985 *input_line_pointer
= c
;
2989 demand_empty_rest_of_line ();
2991 #else /* ! TC_I960 */
2992 /* The MRI assembler seems to use different forms of .sect for
2993 different targets. */
2994 as_bad ("MRI mode not supported for this target");
2995 ignore_rest_of_line ();
2996 #endif /* ! TC_I960 */
2997 #endif /* ! TC_M68K */
3000 /* Handle the .print pseudo-op. */
3003 s_print (int ignore ATTRIBUTE_UNUSED
)
3008 s
= demand_copy_C_string (&len
);
3011 demand_empty_rest_of_line ();
3014 /* Handle the .purgem pseudo-op. */
3017 s_purgem (int ignore ATTRIBUTE_UNUSED
)
3019 if (is_it_end_of_statement ())
3021 demand_empty_rest_of_line ();
3031 name
= input_line_pointer
;
3032 c
= get_symbol_end ();
3033 delete_macro (name
);
3034 *input_line_pointer
= c
;
3037 while (*input_line_pointer
++ == ',');
3039 --input_line_pointer
;
3040 demand_empty_rest_of_line ();
3043 /* Handle the .endm/.endr pseudo-ops. */
3046 s_bad_end (int endr
)
3048 as_warn (_(".end%c encountered without preceding %s"),
3050 endr
? ".rept, .irp, or .irpc" : ".macro");
3051 demand_empty_rest_of_line ();
3054 /* Handle the .rept pseudo-op. */
3057 s_rept (int ignore ATTRIBUTE_UNUSED
)
3061 count
= get_absolute_expression ();
3063 do_repeat (count
, "REPT", "ENDR");
3066 /* This function provides a generic repeat block implementation. It allows
3067 different directives to be used as the start/end keys. */
3070 do_repeat (int count
, const char *start
, const char *end
)
3076 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
3078 as_bad (_("%s without %s"), start
, end
);
3082 sb_build (&many
, count
* one
.len
);
3084 sb_add_sb (&many
, &one
);
3088 input_scrub_include_sb (&many
, input_line_pointer
, 1);
3090 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3093 /* Like do_repeat except that any text matching EXPANDER in the
3094 block is replaced by the itteration count. */
3097 do_repeat_with_expander (int count
,
3100 const char * expander
)
3106 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
3108 as_bad (_("%s without %s"), start
, end
);
3114 if (expander
!= NULL
&& strstr (one
.ptr
, expander
) != NULL
)
3116 while (count
-- > 0)
3122 sb_build (& processed
, one
.len
);
3123 sb_add_sb (& processed
, & one
);
3124 sub
= strstr (processed
.ptr
, expander
);
3125 len
= sprintf (sub
, "%d", count
);
3126 gas_assert (len
< 8);
3127 strcpy (sub
+ len
, sub
+ 8);
3128 processed
.len
-= (8 - len
);
3129 sb_add_sb (& many
, & processed
);
3130 sb_kill (& processed
);
3135 sb_add_sb (&many
, &one
);
3139 input_scrub_include_sb (&many
, input_line_pointer
, 1);
3141 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3144 /* Skip to end of current repeat loop; EXTRA indicates how many additional
3145 input buffers to skip. Assumes that conditionals preceding the loop end
3146 are properly nested.
3148 This function makes it easier to implement a premature "break" out of the
3149 loop. The EXTRA arg accounts for other buffers we might have inserted,
3150 such as line substitutions. */
3153 end_repeat (int extra
)
3155 cond_exit_macro (macro_nest
);
3156 while (extra
-- >= 0)
3157 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3161 assign_symbol (char *name
, int mode
)
3165 if (name
[0] == '.' && name
[1] == '\0')
3167 /* Turn '. = mumble' into a .org mumble. */
3171 segment
= get_known_segmented_expression (&exp
);
3174 do_org (segment
, &exp
, 0);
3179 if ((symbolP
= symbol_find (name
)) == NULL
3180 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
3182 symbolP
= symbol_find_or_make (name
);
3184 /* When doing symbol listings, play games with dummy fragments living
3185 outside the normal fragment chain to record the file and line info
3187 if (listing
& LISTING_SYMBOLS
)
3189 extern struct list_info_struct
*listing_tail
;
3190 fragS
*dummy_frag
= (fragS
*) xcalloc (1, sizeof (fragS
));
3191 dummy_frag
->line
= listing_tail
;
3192 dummy_frag
->fr_symbol
= symbolP
;
3193 symbol_set_frag (symbolP
, dummy_frag
);
3196 #if defined (OBJ_COFF) && !defined (TE_PE)
3197 /* "set" symbols are local unless otherwise specified. */
3198 SF_SET_LOCAL (symbolP
);
3202 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3204 if ((mode
!= 0 || !S_IS_VOLATILE (symbolP
))
3205 && !S_CAN_BE_REDEFINED (symbolP
))
3207 as_bad (_("symbol `%s' is already defined"), name
);
3208 symbolP
= symbol_clone (symbolP
, 0);
3210 /* If the symbol is volatile, copy the symbol and replace the
3211 original with the copy, so that previous uses of the symbol will
3212 retain the value of the symbol at the point of use. */
3213 else if (S_IS_VOLATILE (symbolP
))
3214 symbolP
= symbol_clone (symbolP
, 1);
3218 S_SET_VOLATILE (symbolP
);
3220 S_SET_FORWARD_REF (symbolP
);
3222 pseudo_set (symbolP
);
3225 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3226 then this is .equiv, and it is an error if the symbol is already
3227 defined. If EQUIV is -1, the symbol additionally is a forward
3235 /* Especial apologies for the random logic:
3236 this just grew, and could be parsed much more simply!
3238 if ((name
= read_symbol_name ()) == NULL
)
3241 if (*input_line_pointer
!= ',')
3243 as_bad (_("expected comma after \"%s\""), name
);
3244 ignore_rest_of_line ();
3249 input_line_pointer
++;
3250 assign_symbol (name
, equiv
);
3251 demand_empty_rest_of_line ();
3265 #ifdef md_flush_pending_output
3266 md_flush_pending_output ();
3269 #ifdef md_cons_align
3274 stop
= mri_comment_field (&stopc
);
3276 /* In m68k MRI mode, we need to align to a word boundary, unless
3278 if (flag_m68k_mri
&& mult
> 1)
3280 if (now_seg
== absolute_section
)
3282 abs_section_offset
+= abs_section_offset
& 1;
3283 if (line_label
!= NULL
)
3284 S_SET_VALUE (line_label
, abs_section_offset
);
3286 else if (mri_common_symbol
!= NULL
)
3290 mri_val
= S_GET_VALUE (mri_common_symbol
);
3291 if ((mri_val
& 1) != 0)
3293 S_SET_VALUE (mri_common_symbol
, mri_val
+ 1);
3294 if (line_label
!= NULL
)
3296 expressionS
*symexp
;
3298 symexp
= symbol_get_value_expression (line_label
);
3299 know (symexp
->X_op
== O_symbol
);
3300 know (symexp
->X_add_symbol
== mri_common_symbol
);
3301 symexp
->X_add_number
+= 1;
3307 do_align (1, (char *) NULL
, 0, 0);
3308 if (line_label
!= NULL
)
3310 symbol_set_frag (line_label
, frag_now
);
3311 S_SET_VALUE (line_label
, frag_now_fix ());
3321 if (*input_line_pointer
== ',')
3323 ++input_line_pointer
;
3328 val
.X_op
= O_constant
;
3329 val
.X_add_number
= 0;
3332 if (val
.X_op
!= O_constant
3333 || val
.X_add_number
< - 0x80
3334 || val
.X_add_number
> 0xff
3335 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
3337 resolve_expression (&exp
);
3338 if (exp
.X_op
!= O_constant
)
3339 as_bad (_("unsupported variable size or fill value"));
3346 bytes
= mult
* exp
.X_add_number
;
3347 for (i
= 0; i
< exp
.X_add_number
; i
++)
3348 emit_expr (&val
, mult
);
3353 if (now_seg
== absolute_section
|| mri_common_symbol
!= NULL
)
3354 resolve_expression (&exp
);
3356 if (exp
.X_op
== O_constant
)
3360 repeat
= exp
.X_add_number
;
3367 as_warn (_(".space repeat count is zero, ignored"));
3368 else if (repeat
< 0)
3369 as_warn (_(".space repeat count is negative, ignored"));
3373 /* If we are in the absolute section, just bump the offset. */
3374 if (now_seg
== absolute_section
)
3376 abs_section_offset
+= repeat
;
3380 /* If we are secretly in an MRI common section, then
3381 creating space just increases the size of the common
3383 if (mri_common_symbol
!= NULL
)
3385 S_SET_VALUE (mri_common_symbol
,
3386 S_GET_VALUE (mri_common_symbol
) + repeat
);
3391 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
3392 (offsetT
) repeat
, (char *) 0);
3396 if (now_seg
== absolute_section
)
3398 as_bad (_("space allocation too complex in absolute section"));
3399 subseg_set (text_section
, 0);
3402 if (mri_common_symbol
!= NULL
)
3404 as_bad (_("space allocation too complex in common section"));
3405 mri_common_symbol
= NULL
;
3409 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
3410 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
3414 *p
= val
.X_add_number
;
3419 /* In MRI mode, after an odd number of bytes, we must align to an
3420 even word boundary, unless the next instruction is a dc.b, ds.b
3422 if (flag_mri
&& (bytes
& 1) != 0)
3423 mri_pending_align
= 1;
3425 demand_empty_rest_of_line ();
3428 mri_comment_end (stop
, stopc
);
3431 /* This is like s_space, but the value is a floating point number with
3432 the given precision. This is for the MRI dcb.s pseudo-op and
3436 s_float_space (int float_type
)
3440 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
3444 #ifdef md_cons_align
3449 stop
= mri_comment_field (&stopc
);
3451 count
= get_absolute_expression ();
3454 if (*input_line_pointer
!= ',')
3456 as_bad (_("missing value"));
3457 ignore_rest_of_line ();
3459 mri_comment_end (stop
, stopc
);
3463 ++input_line_pointer
;
3467 /* Skip any 0{letter} that may be present. Don't even check if the
3468 * letter is legal. */
3469 if (input_line_pointer
[0] == '0'
3470 && ISALPHA (input_line_pointer
[1]))
3471 input_line_pointer
+= 2;
3473 /* Accept :xxxx, where the x's are hex digits, for a floating point
3474 with the exact digits specified. */
3475 if (input_line_pointer
[0] == ':')
3477 flen
= hex_float (float_type
, temp
);
3480 ignore_rest_of_line ();
3482 mri_comment_end (stop
, stopc
);
3490 err
= md_atof (float_type
, temp
, &flen
);
3491 know (flen
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3492 know (err
!= NULL
|| flen
> 0);
3495 as_bad (_("bad floating literal: %s"), err
);
3496 ignore_rest_of_line ();
3498 mri_comment_end (stop
, stopc
);
3503 while (--count
>= 0)
3507 p
= frag_more (flen
);
3508 memcpy (p
, temp
, (unsigned int) flen
);
3511 demand_empty_rest_of_line ();
3514 mri_comment_end (stop
, stopc
);
3517 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3520 s_struct (int ignore ATTRIBUTE_UNUSED
)
3526 stop
= mri_comment_field (&stopc
);
3527 abs_section_offset
= get_absolute_expression ();
3528 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3529 /* The ELF backend needs to know that we are changing sections, so
3530 that .previous works correctly. */
3532 obj_elf_section_change_hook ();
3534 subseg_set (absolute_section
, 0);
3535 demand_empty_rest_of_line ();
3537 mri_comment_end (stop
, stopc
);
3541 s_text (int ignore ATTRIBUTE_UNUSED
)
3545 temp
= get_absolute_expression ();
3546 subseg_set (text_section
, (subsegT
) temp
);
3547 demand_empty_rest_of_line ();
3550 /* .weakref x, y sets x as an alias to y that, as long as y is not
3551 referenced directly, will cause y to become a weak symbol. */
3553 s_weakref (int ignore ATTRIBUTE_UNUSED
)
3560 if ((name
= read_symbol_name ()) == NULL
)
3563 symbolP
= symbol_find_or_make (name
);
3565 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3567 if (!S_IS_VOLATILE (symbolP
))
3569 as_bad (_("symbol `%s' is already defined"), name
);
3572 symbolP
= symbol_clone (symbolP
, 1);
3573 S_CLEAR_VOLATILE (symbolP
);
3578 if (*input_line_pointer
!= ',')
3580 as_bad (_("expected comma after \"%s\""), name
);
3584 input_line_pointer
++;
3589 if ((name
= read_symbol_name ()) == NULL
)
3592 if ((symbolP2
= symbol_find_noref (name
, 1)) == NULL
3593 && (symbolP2
= md_undefined_symbol (name
)) == NULL
)
3595 symbolP2
= symbol_find_or_make (name
);
3596 S_SET_WEAKREFD (symbolP2
);
3600 symbolS
*symp
= symbolP2
;
3602 while (S_IS_WEAKREFR (symp
) && symp
!= symbolP
)
3604 expressionS
*expP
= symbol_get_value_expression (symp
);
3606 gas_assert (expP
->X_op
== O_symbol
3607 && expP
->X_add_number
== 0);
3608 symp
= expP
->X_add_symbol
;
3610 if (symp
== symbolP
)
3614 loop
= concat (S_GET_NAME (symbolP
),
3615 " => ", S_GET_NAME (symbolP2
), (const char *) NULL
);
3618 while (symp
!= symbolP
)
3620 char *old_loop
= loop
;
3622 symp
= symbol_get_value_expression (symp
)->X_add_symbol
;
3623 loop
= concat (loop
, " => ", S_GET_NAME (symp
),
3624 (const char *) NULL
);
3628 as_bad (_("%s: would close weakref loop: %s"),
3629 S_GET_NAME (symbolP
), loop
);
3633 ignore_rest_of_line ();
3637 /* Short-circuiting instead of just checking here might speed
3638 things up a tiny little bit, but loop error messages would
3639 miss intermediate links. */
3640 /* symbolP2 = symp; */
3643 memset (&exp
, 0, sizeof (exp
));
3644 exp
.X_op
= O_symbol
;
3645 exp
.X_add_symbol
= symbolP2
;
3647 S_SET_SEGMENT (symbolP
, undefined_section
);
3648 symbol_set_value_expression (symbolP
, &exp
);
3649 symbol_set_frag (symbolP
, &zero_address_frag
);
3650 S_SET_WEAKREFR (symbolP
);
3652 demand_empty_rest_of_line ();
3657 ignore_rest_of_line ();
3663 /* Verify that we are at the end of a line. If not, issue an error and
3667 demand_empty_rest_of_line (void)
3670 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3671 input_line_pointer
++;
3674 if (ISPRINT (*input_line_pointer
))
3675 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3676 *input_line_pointer
);
3678 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3679 *input_line_pointer
);
3680 ignore_rest_of_line ();
3683 /* Return pointing just after end-of-line. */
3684 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3687 /* Silently advance to the end of line. Use this after already having
3688 issued an error about something bad. */
3691 ignore_rest_of_line (void)
3693 while (input_line_pointer
< buffer_limit
3694 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3695 input_line_pointer
++;
3697 input_line_pointer
++;
3699 /* Return pointing just after end-of-line. */
3700 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3703 /* Sets frag for given symbol to zero_address_frag, except when the
3704 symbol frag is already set to a dummy listing frag. */
3707 set_zero_frag (symbolS
*symbolP
)
3709 if (symbol_get_frag (symbolP
)->fr_type
!= rs_dummy
)
3710 symbol_set_frag (symbolP
, &zero_address_frag
);
3713 /* In: Pointer to a symbol.
3714 Input_line_pointer->expression.
3716 Out: Input_line_pointer->just after any whitespace after expression.
3717 Tried to set symbol to value of expression.
3718 Will change symbols type, value, and frag; */
3721 pseudo_set (symbolS
*symbolP
)
3726 know (symbolP
); /* NULL pointer is logic error. */
3728 if (!S_IS_FORWARD_REF (symbolP
))
3729 (void) expression (&exp
);
3731 (void) deferred_expression (&exp
);
3733 if (exp
.X_op
== O_illegal
)
3734 as_bad (_("illegal expression"));
3735 else if (exp
.X_op
== O_absent
)
3736 as_bad (_("missing expression"));
3737 else if (exp
.X_op
== O_big
)
3739 if (exp
.X_add_number
> 0)
3740 as_bad (_("bignum invalid"));
3742 as_bad (_("floating point number invalid"));
3744 else if (exp
.X_op
== O_subtract
3745 && !S_IS_FORWARD_REF (symbolP
)
3746 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
3747 && (symbol_get_frag (exp
.X_add_symbol
)
3748 == symbol_get_frag (exp
.X_op_symbol
)))
3750 exp
.X_op
= O_constant
;
3751 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
3752 - S_GET_VALUE (exp
.X_op_symbol
));
3755 if (symbol_section_p (symbolP
))
3757 as_bad ("attempt to set value of section symbol");
3766 exp
.X_add_number
= 0;
3769 S_SET_SEGMENT (symbolP
, absolute_section
);
3770 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3771 set_zero_frag (symbolP
);
3775 #ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
3776 if (S_IS_EXTERNAL (symbolP
))
3778 as_bad ("can't equate global symbol `%s' with register name",
3779 S_GET_NAME (symbolP
));
3783 S_SET_SEGMENT (symbolP
, reg_section
);
3784 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3785 set_zero_frag (symbolP
);
3786 symbol_get_value_expression (symbolP
)->X_op
= O_register
;
3790 seg
= S_GET_SEGMENT (exp
.X_add_symbol
);
3791 /* For x=undef+const, create an expression symbol.
3792 For x=x+const, just update x except when x is an undefined symbol
3793 For x=defined+const, evaluate x. */
3794 if (symbolP
== exp
.X_add_symbol
3795 && (seg
!= undefined_section
3796 || !symbol_constant_p (symbolP
)))
3798 *symbol_X_add_number (symbolP
) += exp
.X_add_number
;
3801 else if (!S_IS_FORWARD_REF (symbolP
) && seg
!= undefined_section
)
3803 symbolS
*s
= exp
.X_add_symbol
;
3805 if (S_IS_COMMON (s
))
3806 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3807 S_GET_NAME (symbolP
), S_GET_NAME (s
));
3809 S_SET_SEGMENT (symbolP
, seg
);
3810 S_SET_VALUE (symbolP
, exp
.X_add_number
+ S_GET_VALUE (s
));
3811 symbol_set_frag (symbolP
, symbol_get_frag (s
));
3812 copy_symbol_attributes (symbolP
, s
);
3815 S_SET_SEGMENT (symbolP
, undefined_section
);
3816 symbol_set_value_expression (symbolP
, &exp
);
3817 copy_symbol_attributes (symbolP
, exp
.X_add_symbol
);
3818 set_zero_frag (symbolP
);
3822 /* The value is some complex expression. */
3823 S_SET_SEGMENT (symbolP
, expr_section
);
3824 symbol_set_value_expression (symbolP
, &exp
);
3825 set_zero_frag (symbolP
);
3832 CONStruct more frag of .bytes, or .words etc.
3833 Should need_pass_2 be 1 then emit no frag(s).
3834 This understands EXPRESSIONS.
3838 This has a split personality. We use expression() to read the
3839 value. We can detect if the value won't fit in a byte or word.
3840 But we can't detect if expression() discarded significant digits
3841 in the case of a long. Not worth the crocks required to fix it. */
3843 /* Select a parser for cons expressions. */
3845 /* Some targets need to parse the expression in various fancy ways.
3846 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3847 (for example, the HPPA does this). Otherwise, you can define
3848 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3849 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3850 are defined, which is the normal case, then only simple expressions
3855 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
3858 #ifndef TC_PARSE_CONS_EXPRESSION
3859 #ifdef BITFIELD_CONS_EXPRESSIONS
3860 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3861 (parse_bitfield_cons (EXP, NBYTES), TC_PARSE_CONS_RETURN_NONE)
3863 parse_bitfield_cons (expressionS
*exp
, unsigned int nbytes
);
3865 #ifdef REPEAT_CONS_EXPRESSIONS
3866 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3867 (parse_repeat_cons (EXP, NBYTES), TC_PARSE_CONS_RETURN_NONE)
3869 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
3872 /* If we haven't gotten one yet, just call expression. */
3873 #ifndef TC_PARSE_CONS_EXPRESSION
3874 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
3875 (expression (EXP), TC_PARSE_CONS_RETURN_NONE)
3880 do_parse_cons_expression (expressionS
*exp
,
3881 int nbytes ATTRIBUTE_UNUSED
)
3883 (void) TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3887 /* Worker to do .byte etc statements.
3888 Clobbers input_line_pointer and checks end-of-line. */
3891 cons_worker (int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
3899 #ifdef md_flush_pending_output
3900 md_flush_pending_output ();
3904 stop
= mri_comment_field (&stopc
);
3906 if (is_it_end_of_statement ())
3908 demand_empty_rest_of_line ();
3910 mri_comment_end (stop
, stopc
);
3914 #ifdef TC_ADDRESS_BYTES
3916 nbytes
= TC_ADDRESS_BYTES ();
3919 #ifdef md_cons_align
3920 md_cons_align (nbytes
);
3926 TC_PARSE_CONS_RETURN_TYPE ret
= TC_PARSE_CONS_RETURN_NONE
;
3927 #ifdef TC_CONS_FIX_CHECK
3928 fixS
**cur_fix
= &frchain_now
->fix_tail
;
3930 if (*cur_fix
!= NULL
)
3931 cur_fix
= &(*cur_fix
)->fx_next
;
3936 parse_mri_cons (&exp
, (unsigned int) nbytes
);
3940 if (*input_line_pointer
== '"')
3942 as_bad (_("unexpected `\"' in expression"));
3943 ignore_rest_of_line ();
3946 ret
= TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
3951 if (exp
.X_op
== O_symbol
)
3952 exp
.X_op
= O_symbol_rva
;
3954 as_fatal (_("rva without symbol"));
3956 emit_expr_with_reloc (&exp
, (unsigned int) nbytes
, ret
);
3957 #ifdef TC_CONS_FIX_CHECK
3958 TC_CONS_FIX_CHECK (&exp
, nbytes
, *cur_fix
);
3962 while (*input_line_pointer
++ == ',');
3964 /* In MRI mode, after an odd number of bytes, we must align to an
3965 even word boundary, unless the next instruction is a dc.b, ds.b
3967 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
3968 mri_pending_align
= 1;
3970 input_line_pointer
--; /* Put terminator back into stream. */
3972 demand_empty_rest_of_line ();
3975 mri_comment_end (stop
, stopc
);
3981 cons_worker (size
, 0);
3987 cons_worker (size
, 1);
3990 /* .reloc offset, reloc_name, symbol+addend. */
3993 s_reloc (int ignore ATTRIBUTE_UNUSED
)
4000 struct reloc_list
*reloc
;
4001 struct _bfd_rel
{ char *name
; bfd_reloc_code_real_type code
; };
4002 static struct _bfd_rel bfd_relocs
[] = {
4003 { "NONE", BFD_RELOC_NONE
},
4004 { "8", BFD_RELOC_8
},
4005 { "16", BFD_RELOC_16
},
4006 { "32", BFD_RELOC_32
},
4007 { "64", BFD_RELOC_64
}
4010 reloc
= (struct reloc_list
*) xmalloc (sizeof (*reloc
));
4013 stop
= mri_comment_field (&stopc
);
4022 as_bad (_("missing or bad offset expression"));
4025 exp
.X_add_symbol
= section_symbol (now_seg
);
4026 exp
.X_op
= O_symbol
;
4029 if (exp
.X_add_number
== 0)
4031 reloc
->u
.a
.offset_sym
= exp
.X_add_symbol
;
4036 reloc
->u
.a
.offset_sym
= make_expr_symbol (&exp
);
4041 if (*input_line_pointer
!= ',')
4043 as_bad (_("missing reloc type"));
4047 ++input_line_pointer
;
4049 r_name
= input_line_pointer
;
4050 c
= get_symbol_end ();
4051 if (strncasecmp (r_name
, "BFD_RELOC_", 10) == 0)
4055 for (reloc
->u
.a
.howto
= NULL
, i
= 0; i
< ARRAY_SIZE (bfd_relocs
); i
++)
4056 if (strcasecmp (r_name
+ 10, bfd_relocs
[i
].name
) == 0)
4058 reloc
->u
.a
.howto
= bfd_reloc_type_lookup (stdoutput
,
4059 bfd_relocs
[i
].code
);
4064 reloc
->u
.a
.howto
= bfd_reloc_name_lookup (stdoutput
, r_name
);
4065 *input_line_pointer
= c
;
4066 if (reloc
->u
.a
.howto
== NULL
)
4068 as_bad (_("unrecognized reloc type"));
4072 exp
.X_op
= O_absent
;
4074 if (*input_line_pointer
== ',')
4076 ++input_line_pointer
;
4084 as_bad (_("bad reloc expression"));
4086 ignore_rest_of_line ();
4089 mri_comment_end (stop
, stopc
);
4092 reloc
->u
.a
.sym
= NULL
;
4093 reloc
->u
.a
.addend
= 0;
4096 reloc
->u
.a
.sym
= NULL
;
4097 reloc
->u
.a
.addend
= exp
.X_add_number
;
4100 reloc
->u
.a
.sym
= exp
.X_add_symbol
;
4101 reloc
->u
.a
.addend
= exp
.X_add_number
;
4104 reloc
->u
.a
.sym
= make_expr_symbol (&exp
);
4105 reloc
->u
.a
.addend
= 0;
4109 as_where (&reloc
->file
, &reloc
->line
);
4110 reloc
->next
= reloc_list
;
4113 demand_empty_rest_of_line ();
4115 mri_comment_end (stop
, stopc
);
4118 /* Put the contents of expression EXP into the object file using
4119 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
4122 emit_expr (expressionS
*exp
, unsigned int nbytes
)
4124 emit_expr_with_reloc (exp
, nbytes
, TC_PARSE_CONS_RETURN_NONE
);
4128 emit_expr_with_reloc (expressionS
*exp
,
4129 unsigned int nbytes
,
4130 TC_PARSE_CONS_RETURN_TYPE reloc
)
4134 valueT extra_digit
= 0;
4136 /* Don't do anything if we are going to make another pass. */
4141 dot_value
= frag_now_fix ();
4142 dot_frag
= frag_now
;
4146 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
4147 appear as a four byte positive constant in the .line section,
4148 followed by a 2 byte 0xffff. Look for that case here. */
4150 static int dwarf_line
= -1;
4152 if (strcmp (segment_name (now_seg
), ".line") != 0)
4154 else if (dwarf_line
>= 0
4156 && exp
->X_op
== O_constant
4157 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
4158 listing_source_line ((unsigned int) dwarf_line
);
4159 else if (nbytes
== 4
4160 && exp
->X_op
== O_constant
4161 && exp
->X_add_number
>= 0)
4162 dwarf_line
= exp
->X_add_number
;
4167 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
4168 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
4169 AT_sibling (0x12) followed by a four byte address of the sibling
4170 followed by a 2 byte AT_name (0x38) followed by the name of the
4171 file. We look for that case here. */
4173 static int dwarf_file
= 0;
4175 if (strcmp (segment_name (now_seg
), ".debug") != 0)
4177 else if (dwarf_file
== 0
4179 && exp
->X_op
== O_constant
4180 && exp
->X_add_number
== 0x11)
4182 else if (dwarf_file
== 1
4184 && exp
->X_op
== O_constant
4185 && exp
->X_add_number
== 0x12)
4187 else if (dwarf_file
== 2
4190 else if (dwarf_file
== 3
4192 && exp
->X_op
== O_constant
4193 && exp
->X_add_number
== 0x38)
4198 /* The variable dwarf_file_string tells stringer that the string
4199 may be the name of the source file. */
4200 if (dwarf_file
== 4)
4201 dwarf_file_string
= 1;
4203 dwarf_file_string
= 0;
4208 if (check_eh_frame (exp
, &nbytes
))
4213 /* Allow `.word 0' in the absolute section. */
4214 if (now_seg
== absolute_section
)
4216 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
4217 as_bad (_("attempt to store value in absolute section"));
4218 abs_section_offset
+= nbytes
;
4222 /* Handle a negative bignum. */
4224 && exp
->X_add_number
== 0
4225 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
4226 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
4229 unsigned long carry
;
4231 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
4233 /* Negate the bignum: one's complement each digit and add 1. */
4235 for (i
= 0; i
< exp
->X_add_number
; i
++)
4239 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
4242 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
4243 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
4246 /* We can ignore any carry out, because it will be handled by
4247 extra_digit if it is needed. */
4249 extra_digit
= (valueT
) -1;
4253 if (op
== O_absent
|| op
== O_illegal
)
4255 as_warn (_("zero assumed for missing expression"));
4256 exp
->X_add_number
= 0;
4259 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4261 as_bad (_("floating point number invalid"));
4262 exp
->X_add_number
= 0;
4265 else if (op
== O_register
)
4267 as_warn (_("register value used as expression"));
4271 p
= frag_more ((int) nbytes
);
4273 if (reloc
!= TC_PARSE_CONS_RETURN_NONE
)
4275 emit_expr_fix (exp
, nbytes
, frag_now
, p
, reloc
);
4279 #ifndef WORKING_DOT_WORD
4280 /* If we have the difference of two symbols in a word, save it on
4281 the broken_words list. See the code in write.c. */
4282 if (op
== O_subtract
&& nbytes
== 2)
4284 struct broken_word
*x
;
4286 x
= (struct broken_word
*) xmalloc (sizeof (struct broken_word
));
4287 x
->next_broken_word
= broken_words
;
4290 x
->subseg
= now_subseg
;
4292 x
->word_goes_here
= p
;
4294 x
->add
= exp
->X_add_symbol
;
4295 x
->sub
= exp
->X_op_symbol
;
4296 x
->addnum
= exp
->X_add_number
;
4304 /* If we have an integer, but the number of bytes is too large to
4305 pass to md_number_to_chars, handle it as a bignum. */
4306 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
4308 extra_digit
= exp
->X_unsigned
? 0 : -1;
4309 convert_to_bignum (exp
, !exp
->X_unsigned
);
4313 if (op
== O_constant
)
4321 /* JF << of >= number of bits in the object is undefined. In
4322 particular SPARC (Sun 4) has problems. */
4323 if (nbytes
>= sizeof (valueT
))
4326 if (nbytes
> sizeof (valueT
))
4329 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
4333 /* Don't store these bits. */
4334 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
4335 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
4338 unmask
= ~mask
; /* Do store these bits. */
4341 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
4342 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
4345 get
= exp
->X_add_number
;
4347 if ((get
& mask
) != 0
4348 && ((get
& mask
) != mask
4349 || (get
& hibit
) == 0))
4350 { /* Leading bits contain both 0s & 1s. */
4351 #if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG
4353 as_warn (_("value 0x%llx truncated to 0x%llx"),
4354 (unsigned long long) get
, (unsigned long long) use
);
4356 as_warn (_("value 0x%I64x truncated to 0x%I64x"),
4357 (unsigned long long) get
, (unsigned long long) use
);
4360 as_warn (_("value 0x%lx truncated to 0x%lx"),
4361 (unsigned long) get
, (unsigned long) use
);
4364 /* Put bytes in right order. */
4365 md_number_to_chars (p
, use
, (int) nbytes
);
4367 else if (op
== O_big
)
4370 LITTLENUM_TYPE
*nums
;
4372 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
4375 int i
= nbytes
/ CHARS_PER_LITTLENUM
;
4378 LITTLENUM_TYPE sign
= 0;
4379 if ((generic_bignum
[--i
]
4380 & (1 << (LITTLENUM_NUMBER_OF_BITS
- 1))) != 0)
4381 sign
= ~(LITTLENUM_TYPE
) 0;
4382 while (++i
< exp
->X_add_number
)
4383 if (generic_bignum
[i
] != sign
)
4386 if (i
< exp
->X_add_number
)
4387 as_warn (_("bignum truncated to %d bytes"), nbytes
);
4393 md_number_to_chars (p
, (valueT
) generic_bignum
[0], 1);
4396 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
4398 if (target_big_endian
)
4400 while (nbytes
> size
)
4402 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4403 nbytes
-= CHARS_PER_LITTLENUM
;
4404 p
+= CHARS_PER_LITTLENUM
;
4407 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
4408 while (size
>= CHARS_PER_LITTLENUM
)
4411 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4412 size
-= CHARS_PER_LITTLENUM
;
4413 p
+= CHARS_PER_LITTLENUM
;
4418 nums
= generic_bignum
;
4419 while (size
>= CHARS_PER_LITTLENUM
)
4421 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4423 size
-= CHARS_PER_LITTLENUM
;
4424 p
+= CHARS_PER_LITTLENUM
;
4425 nbytes
-= CHARS_PER_LITTLENUM
;
4428 while (nbytes
>= CHARS_PER_LITTLENUM
)
4430 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4431 nbytes
-= CHARS_PER_LITTLENUM
;
4432 p
+= CHARS_PER_LITTLENUM
;
4437 emit_expr_fix (exp
, nbytes
, frag_now
, p
, TC_PARSE_CONS_RETURN_NONE
);
4441 emit_expr_fix (expressionS
*exp
, unsigned int nbytes
, fragS
*frag
, char *p
,
4442 TC_PARSE_CONS_RETURN_TYPE r ATTRIBUTE_UNUSED
)
4445 unsigned int size
= nbytes
;
4447 memset (p
, 0, size
);
4449 /* Generate a fixS to record the symbol value. */
4451 #ifdef TC_CONS_FIX_NEW
4452 TC_CONS_FIX_NEW (frag
, p
- frag
->fr_literal
+ offset
, size
, exp
, r
);
4454 if (r
!= TC_PARSE_CONS_RETURN_NONE
)
4456 reloc_howto_type
*reloc_howto
;
4458 reloc_howto
= bfd_reloc_type_lookup (stdoutput
, r
);
4459 size
= bfd_get_reloc_size (reloc_howto
);
4463 as_bad (_("%s relocations do not fit in %u bytes\n"),
4464 reloc_howto
->name
, nbytes
);
4467 else if (target_big_endian
)
4468 offset
= nbytes
- size
;
4489 as_bad (_("unsupported BFD relocation size %u"), size
);
4492 fix_new_exp (frag
, p
- frag
->fr_literal
+ offset
, size
,
4497 #ifdef BITFIELD_CONS_EXPRESSIONS
4499 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
4500 w:x,y:z, where w and y are bitwidths and x and y are values. They
4501 then pack them all together. We do a little better in that we allow
4502 them in words, longs, etc. and we'll pack them in target byte order
4505 The rules are: pack least significant bit first, if a field doesn't
4506 entirely fit, put it in the next unit. Overflowing the bitfield is
4507 explicitly *not* even a warning. The bitwidth should be considered
4510 To use this function the tc-XXX.h file should define
4511 BITFIELD_CONS_EXPRESSIONS. */
4514 parse_bitfield_cons (exp
, nbytes
)
4516 unsigned int nbytes
;
4518 unsigned int bits_available
= BITS_PER_CHAR
* nbytes
;
4519 char *hold
= input_line_pointer
;
4521 (void) expression (exp
);
4523 if (*input_line_pointer
== ':')
4530 unsigned long width
;
4532 if (*input_line_pointer
!= ':')
4534 input_line_pointer
= hold
;
4536 } /* Next piece is not a bitfield. */
4538 /* In the general case, we can't allow
4539 full expressions with symbol
4540 differences and such. The relocation
4541 entries for symbols not defined in this
4542 assembly would require arbitrary field
4543 widths, positions, and masks which most
4544 of our current object formats don't
4547 In the specific case where a symbol
4548 *is* defined in this assembly, we
4549 *could* build fixups and track it, but
4550 this could lead to confusion for the
4551 backends. I'm lazy. I'll take any
4552 SEG_ABSOLUTE. I think that means that
4553 you can use a previous .set or
4554 .equ type symbol. xoxorich. */
4556 if (exp
->X_op
== O_absent
)
4558 as_warn (_("using a bit field width of zero"));
4559 exp
->X_add_number
= 0;
4560 exp
->X_op
= O_constant
;
4561 } /* Implied zero width bitfield. */
4563 if (exp
->X_op
!= O_constant
)
4565 *input_line_pointer
= '\0';
4566 as_bad (_("field width \"%s\" too complex for a bitfield"), hold
);
4567 *input_line_pointer
= ':';
4568 demand_empty_rest_of_line ();
4570 } /* Too complex. */
4572 if ((width
= exp
->X_add_number
) > (BITS_PER_CHAR
* nbytes
))
4574 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4575 width
, nbytes
, (BITS_PER_CHAR
* nbytes
));
4576 width
= BITS_PER_CHAR
* nbytes
;
4579 if (width
> bits_available
)
4581 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4582 input_line_pointer
= hold
;
4583 exp
->X_add_number
= value
;
4588 hold
= ++input_line_pointer
;
4590 (void) expression (exp
);
4591 if (exp
->X_op
!= O_constant
)
4593 char cache
= *input_line_pointer
;
4595 *input_line_pointer
= '\0';
4596 as_bad (_("field value \"%s\" too complex for a bitfield"), hold
);
4597 *input_line_pointer
= cache
;
4598 demand_empty_rest_of_line ();
4600 } /* Too complex. */
4602 value
|= ((~(-1 << width
) & exp
->X_add_number
)
4603 << ((BITS_PER_CHAR
* nbytes
) - bits_available
));
4605 if ((bits_available
-= width
) == 0
4606 || is_it_end_of_statement ()
4607 || *input_line_pointer
!= ',')
4610 } /* All the bitfields we're gonna get. */
4612 hold
= ++input_line_pointer
;
4613 (void) expression (exp
);
4616 exp
->X_add_number
= value
;
4617 exp
->X_op
= O_constant
;
4618 exp
->X_unsigned
= 1;
4619 exp
->X_extrabit
= 0;
4623 #endif /* BITFIELD_CONS_EXPRESSIONS */
4625 /* Handle an MRI style string expression. */
4629 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
)
4631 if (*input_line_pointer
!= '\''
4632 && (input_line_pointer
[1] != '\''
4633 || (*input_line_pointer
!= 'A'
4634 && *input_line_pointer
!= 'E')))
4635 (void) TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
4639 unsigned int result
= 0;
4641 /* An MRI style string. Cut into as many bytes as will fit into
4642 a nbyte chunk, left justify if necessary, and separate with
4643 commas so we can try again later. */
4644 if (*input_line_pointer
== 'A')
4645 ++input_line_pointer
;
4646 else if (*input_line_pointer
== 'E')
4648 as_bad (_("EBCDIC constants are not supported"));
4649 ++input_line_pointer
;
4652 input_line_pointer
++;
4653 for (scan
= 0; scan
< nbytes
; scan
++)
4655 if (*input_line_pointer
== '\'')
4657 if (input_line_pointer
[1] == '\'')
4659 input_line_pointer
++;
4664 result
= (result
<< 8) | (*input_line_pointer
++);
4668 while (scan
< nbytes
)
4674 /* Create correct expression. */
4675 exp
->X_op
= O_constant
;
4676 exp
->X_add_number
= result
;
4678 /* Fake it so that we can read the next char too. */
4679 if (input_line_pointer
[0] != '\'' ||
4680 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
4682 input_line_pointer
-= 2;
4683 input_line_pointer
[0] = ',';
4684 input_line_pointer
[1] = '\'';
4687 input_line_pointer
++;
4690 #endif /* TC_M68K */
4692 #ifdef REPEAT_CONS_EXPRESSIONS
4694 /* Parse a repeat expression for cons. This is used by the MIPS
4695 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4696 object file COUNT times.
4698 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4701 parse_repeat_cons (exp
, nbytes
)
4703 unsigned int nbytes
;
4710 if (*input_line_pointer
!= ':')
4712 /* No repeat count. */
4716 ++input_line_pointer
;
4717 expression (&count
);
4718 if (count
.X_op
!= O_constant
4719 || count
.X_add_number
<= 0)
4721 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4725 /* The cons function is going to output this expression once. So we
4726 output it count - 1 times. */
4727 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
4728 emit_expr (exp
, nbytes
);
4731 #endif /* REPEAT_CONS_EXPRESSIONS */
4733 /* Parse a floating point number represented as a hex constant. This
4734 permits users to specify the exact bits they want in the floating
4738 hex_float (int float_type
, char *bytes
)
4770 as_bad (_("unknown floating type type '%c'"), float_type
);
4774 /* It would be nice if we could go through expression to parse the
4775 hex constant, but if we get a bignum it's a pain to sort it into
4776 the buffer correctly. */
4778 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4782 /* The MRI assembler accepts arbitrary underscores strewn about
4783 through the hex constant, so we ignore them as well. */
4784 if (*input_line_pointer
== '_')
4786 ++input_line_pointer
;
4792 as_warn (_("floating point constant too large"));
4795 d
= hex_value (*input_line_pointer
) << 4;
4796 ++input_line_pointer
;
4797 while (*input_line_pointer
== '_')
4798 ++input_line_pointer
;
4799 if (hex_p (*input_line_pointer
))
4801 d
+= hex_value (*input_line_pointer
);
4802 ++input_line_pointer
;
4804 if (target_big_endian
)
4807 bytes
[length
- i
- 1] = d
;
4813 if (target_big_endian
)
4814 memset (bytes
+ i
, 0, length
- i
);
4816 memset (bytes
, 0, length
- i
);
4824 CONStruct some more frag chars of .floats .ffloats etc.
4825 Makes 0 or more new frags.
4826 If need_pass_2 == 1, no frags are emitted.
4827 This understands only floating literals, not expressions. Sorry.
4829 A floating constant is defined by atof_generic(), except it is preceded
4830 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4831 reading, I decided to be incompatible. This always tries to give you
4832 rounded bits to the precision of the pseudo-op. Former AS did premature
4833 truncation, restored noisy bits instead of trailing 0s AND gave you
4834 a choice of 2 flavours of noise according to which of 2 floating-point
4835 scanners you directed AS to use.
4837 In: input_line_pointer->whitespace before, or '0' of flonum. */
4840 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4841 int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4844 int length
; /* Number of chars in an object. */
4845 char *err
; /* Error from scanning floating literal. */
4846 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4848 if (is_it_end_of_statement ())
4850 demand_empty_rest_of_line ();
4854 #ifdef md_flush_pending_output
4855 md_flush_pending_output ();
4858 #ifdef md_cons_align
4864 /* input_line_pointer->1st char of a flonum (we hope!). */
4867 /* Skip any 0{letter} that may be present. Don't even check if the
4868 letter is legal. Someone may invent a "z" format and this routine
4869 has no use for such information. Lusers beware: you get
4870 diagnostics if your input is ill-conditioned. */
4871 if (input_line_pointer
[0] == '0'
4872 && ISALPHA (input_line_pointer
[1]))
4873 input_line_pointer
+= 2;
4875 /* Accept :xxxx, where the x's are hex digits, for a floating
4876 point with the exact digits specified. */
4877 if (input_line_pointer
[0] == ':')
4879 ++input_line_pointer
;
4880 length
= hex_float (float_type
, temp
);
4883 ignore_rest_of_line ();
4889 err
= md_atof (float_type
, temp
, &length
);
4890 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
4891 know (err
!= NULL
|| length
> 0);
4894 as_bad (_("bad floating literal: %s"), err
);
4895 ignore_rest_of_line ();
4906 #ifdef REPEAT_CONS_EXPRESSIONS
4907 if (*input_line_pointer
== ':')
4909 expressionS count_exp
;
4911 ++input_line_pointer
;
4912 expression (&count_exp
);
4914 if (count_exp
.X_op
!= O_constant
4915 || count_exp
.X_add_number
<= 0)
4916 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4918 count
= count_exp
.X_add_number
;
4922 while (--count
>= 0)
4924 p
= frag_more (length
);
4925 memcpy (p
, temp
, (unsigned int) length
);
4930 while (*input_line_pointer
++ == ',');
4932 /* Put terminator back into stream. */
4933 --input_line_pointer
;
4934 demand_empty_rest_of_line ();
4937 /* Return the size of a LEB128 value. */
4940 sizeof_sleb128 (offsetT value
)
4947 byte
= (value
& 0x7f);
4948 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4949 Fortunately, we can structure things so that the extra work reduces
4950 to a noop on systems that do things "properly". */
4951 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4954 while (!(((value
== 0) && ((byte
& 0x40) == 0))
4955 || ((value
== -1) && ((byte
& 0x40) != 0))));
4961 sizeof_uleb128 (valueT value
)
4976 sizeof_leb128 (valueT value
, int sign
)
4979 return sizeof_sleb128 ((offsetT
) value
);
4981 return sizeof_uleb128 (value
);
4984 /* Output a LEB128 value. */
4987 output_sleb128 (char *p
, offsetT value
)
4994 unsigned byte
= (value
& 0x7f);
4996 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4997 Fortunately, we can structure things so that the extra work reduces
4998 to a noop on systems that do things "properly". */
4999 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
5001 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
5002 || ((value
== -1) && ((byte
& 0x40) != 0))));
5014 output_uleb128 (char *p
, valueT value
)
5020 unsigned byte
= (value
& 0x7f);
5023 /* More bytes to follow. */
5034 output_leb128 (char *p
, valueT value
, int sign
)
5037 return output_sleb128 (p
, (offsetT
) value
);
5039 return output_uleb128 (p
, value
);
5042 /* Do the same for bignums. We combine sizeof with output here in that
5043 we don't output for NULL values of P. It isn't really as critical as
5044 for "normal" values that this be streamlined. */
5047 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
5054 /* Strip leading sign extensions off the bignum. */
5056 && bignum
[size
- 1] == LITTLENUM_MASK
5057 && bignum
[size
- 2] > LITTLENUM_MASK
/ 2)
5062 /* OR in the next part of the littlenum. */
5063 val
|= (*bignum
<< loaded
);
5064 loaded
+= LITTLENUM_NUMBER_OF_BITS
;
5068 /* Add bytes until there are less than 7 bits left in VAL
5069 or until every non-sign bit has been written. */
5076 || val
!= ((byte
& 0x40) == 0 ? 0 : ((valueT
) 1 << loaded
) - 1))
5083 while ((byte
& 0x80) != 0 && loaded
>= 7);
5087 /* Mop up any left-over bits (of which there will be less than 7). */
5088 if ((byte
& 0x80) != 0)
5090 /* Sign-extend VAL. */
5091 if (val
& (1 << (loaded
- 1)))
5092 val
|= ~0U << loaded
;
5102 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
5109 /* Strip leading zeros off the bignum. */
5110 /* XXX: Is this needed? */
5111 while (size
> 0 && bignum
[size
- 1] == 0)
5116 if (loaded
< 7 && size
> 0)
5118 val
|= (*bignum
<< loaded
);
5119 loaded
+= 8 * CHARS_PER_LITTLENUM
;
5128 if (size
> 0 || val
)
5135 while (byte
& 0x80);
5141 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
, int sign
)
5144 return output_big_sleb128 (p
, bignum
, size
);
5146 return output_big_uleb128 (p
, bignum
, size
);
5149 /* Generate the appropriate fragments for a given expression to emit a
5153 emit_leb128_expr (expressionS
*exp
, int sign
)
5155 operatorT op
= exp
->X_op
;
5156 unsigned int nbytes
;
5158 if (op
== O_absent
|| op
== O_illegal
)
5160 as_warn (_("zero assumed for missing expression"));
5161 exp
->X_add_number
= 0;
5164 else if (op
== O_big
&& exp
->X_add_number
<= 0)
5166 as_bad (_("floating point number invalid"));
5167 exp
->X_add_number
= 0;
5170 else if (op
== O_register
)
5172 as_warn (_("register value used as expression"));
5175 else if (op
== O_constant
5177 && (exp
->X_add_number
< 0) == !exp
->X_extrabit
)
5179 /* We're outputting a signed leb128 and the sign of X_add_number
5180 doesn't reflect the sign of the original value. Convert EXP
5181 to a correctly-extended bignum instead. */
5182 convert_to_bignum (exp
, exp
->X_extrabit
);
5186 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
5187 a signal that this is leb128 data. It shouldn't optimize this away. */
5188 nbytes
= (unsigned int) -1;
5189 if (check_eh_frame (exp
, &nbytes
))
5192 /* Let the backend know that subsequent data may be byte aligned. */
5193 #ifdef md_cons_align
5197 if (op
== O_constant
)
5199 /* If we've got a constant, emit the thing directly right now. */
5201 valueT value
= exp
->X_add_number
;
5205 size
= sizeof_leb128 (value
, sign
);
5206 p
= frag_more (size
);
5207 output_leb128 (p
, value
, sign
);
5209 else if (op
== O_big
)
5211 /* O_big is a different sort of constant. */
5216 size
= output_big_leb128 (NULL
, generic_bignum
, exp
->X_add_number
, sign
);
5217 p
= frag_more (size
);
5218 output_big_leb128 (p
, generic_bignum
, exp
->X_add_number
, sign
);
5222 /* Otherwise, we have to create a variable sized fragment and
5223 resolve things later. */
5225 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
5226 make_expr_symbol (exp
), 0, (char *) NULL
);
5230 /* Parse the .sleb128 and .uleb128 pseudos. */
5237 #ifdef md_flush_pending_output
5238 md_flush_pending_output ();
5244 emit_leb128_expr (&exp
, sign
);
5246 while (*input_line_pointer
++ == ',');
5248 input_line_pointer
--;
5249 demand_empty_rest_of_line ();
5253 stringer_append_char (int c
, int bitsize
)
5255 if (!target_big_endian
)
5256 FRAG_APPEND_1_CHAR (c
);
5261 FRAG_APPEND_1_CHAR (0);
5262 FRAG_APPEND_1_CHAR (0);
5263 FRAG_APPEND_1_CHAR (0);
5264 FRAG_APPEND_1_CHAR (0);
5267 FRAG_APPEND_1_CHAR (0);
5268 FRAG_APPEND_1_CHAR (0);
5271 FRAG_APPEND_1_CHAR (0);
5276 /* Called with invalid bitsize argument. */
5280 if (target_big_endian
)
5281 FRAG_APPEND_1_CHAR (c
);
5284 /* Worker to do .ascii etc statements.
5285 Reads 0 or more ',' separated, double-quoted strings.
5286 Caller should have checked need_pass_2 is FALSE because we don't
5288 Checks for end-of-line.
5289 BITS_APPENDZERO says how many bits are in a target char.
5290 The bottom bit is set if a NUL char should be appended to the strings. */
5293 stringer (int bits_appendzero
)
5295 const int bitsize
= bits_appendzero
& ~7;
5296 const int append_zero
= bits_appendzero
& 1;
5298 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5302 #ifdef md_flush_pending_output
5303 md_flush_pending_output ();
5306 #ifdef md_cons_align
5310 /* The following awkward logic is to parse ZERO or more strings,
5311 comma separated. Recall a string expression includes spaces
5312 before the opening '\"' and spaces after the closing '\"'.
5313 We fake a leading ',' if there is (supposed to be)
5314 a 1st, expression. We keep demanding expressions for each ','. */
5315 if (is_it_end_of_statement ())
5317 c
= 0; /* Skip loop. */
5318 ++input_line_pointer
; /* Compensate for end of loop. */
5322 c
= ','; /* Do loop. */
5324 /* If we have been switched into the abs_section then we
5325 will not have an obstack onto which we can hang strings. */
5326 if (now_seg
== absolute_section
)
5328 as_bad (_("strings must be placed into a section"));
5330 ignore_rest_of_line ();
5333 while (c
== ',' || c
== '<' || c
== '"')
5336 switch (*input_line_pointer
)
5339 ++input_line_pointer
; /*->1st char of string. */
5340 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5341 start
= input_line_pointer
;
5344 while (is_a_char (c
= next_char_of_string ()))
5345 stringer_append_char (c
, bitsize
);
5348 stringer_append_char (0, bitsize
);
5350 know (input_line_pointer
[-1] == '\"');
5352 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5353 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
5354 will emit .string with a filename in the .debug section
5355 after a sequence of constants. See the comment in
5356 emit_expr for the sequence. emit_expr will set
5357 dwarf_file_string to non-zero if this string might be a
5358 source file name. */
5359 if (strcmp (segment_name (now_seg
), ".debug") != 0)
5360 dwarf_file_string
= 0;
5361 else if (dwarf_file_string
)
5363 c
= input_line_pointer
[-1];
5364 input_line_pointer
[-1] = '\0';
5365 listing_source_file (start
);
5366 input_line_pointer
[-1] = c
;
5372 input_line_pointer
++;
5373 c
= get_single_number ();
5374 stringer_append_char (c
, bitsize
);
5375 if (*input_line_pointer
!= '>')
5376 as_bad (_("expected <nn>"));
5378 input_line_pointer
++;
5381 input_line_pointer
++;
5385 c
= *input_line_pointer
;
5388 demand_empty_rest_of_line ();
5391 /* FIXME-SOMEDAY: I had trouble here on characters with the
5392 high bits set. We'll probably also have trouble with
5393 multibyte chars, wide chars, etc. Also be careful about
5394 returning values bigger than 1 byte. xoxorich. */
5397 next_char_of_string (void)
5401 c
= *input_line_pointer
++ & CHAR_MASK
;
5409 as_warn (_("unterminated string; newline inserted"));
5410 bump_line_counters ();
5413 #ifndef NO_STRING_ESCAPES
5415 switch (c
= *input_line_pointer
++)
5443 break; /* As itself. */
5459 for (i
= 0, number
= 0;
5460 ISDIGIT (c
) && i
< 3;
5461 c
= *input_line_pointer
++, i
++)
5463 number
= number
* 8 + c
- '0';
5468 --input_line_pointer
;
5477 c
= *input_line_pointer
++;
5478 while (ISXDIGIT (c
))
5481 number
= number
* 16 + c
- '0';
5482 else if (ISUPPER (c
))
5483 number
= number
* 16 + c
- 'A' + 10;
5485 number
= number
* 16 + c
- 'a' + 10;
5486 c
= *input_line_pointer
++;
5489 --input_line_pointer
;
5494 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
5495 as_warn (_("unterminated string; newline inserted"));
5497 bump_line_counters ();
5502 #ifdef ONLY_STANDARD_ESCAPES
5503 as_bad (_("bad escaped character in string"));
5505 #endif /* ONLY_STANDARD_ESCAPES */
5510 #endif /* ! defined (NO_STRING_ESCAPES) */
5519 get_segmented_expression (expressionS
*expP
)
5523 retval
= expression (expP
);
5524 if (expP
->X_op
== O_illegal
5525 || expP
->X_op
== O_absent
5526 || expP
->X_op
== O_big
)
5528 as_bad (_("expected address expression"));
5529 expP
->X_op
= O_constant
;
5530 expP
->X_add_number
= 0;
5531 retval
= absolute_section
;
5537 get_known_segmented_expression (expressionS
*expP
)
5539 segT retval
= get_segmented_expression (expP
);
5541 if (retval
== undefined_section
)
5543 /* There is no easy way to extract the undefined symbol from the
5545 if (expP
->X_add_symbol
!= NULL
5546 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
5547 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5548 S_GET_NAME (expP
->X_add_symbol
));
5550 as_warn (_("some symbol undefined; zero assumed"));
5551 retval
= absolute_section
;
5552 expP
->X_op
= O_constant
;
5553 expP
->X_add_number
= 0;
5558 char /* Return terminator. */
5559 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
5561 /* FIXME: val_pointer should probably be offsetT *. */
5562 *val_pointer
= (long) get_absolute_expression ();
5563 return (*input_line_pointer
++);
5566 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
5567 Give a warning if that happens. */
5570 demand_copy_C_string (int *len_pointer
)
5574 if ((s
= demand_copy_string (len_pointer
)) != 0)
5578 for (len
= *len_pointer
; len
> 0; len
--)
5585 as_bad (_("this string may not contain \'\\0\'"));
5593 /* Demand string, but return a safe (=private) copy of the string.
5594 Return NULL if we can't read a string here. */
5597 demand_copy_string (int *lenP
)
5605 if (*input_line_pointer
== '\"')
5607 input_line_pointer
++; /* Skip opening quote. */
5609 while (is_a_char (c
= next_char_of_string ()))
5611 obstack_1grow (¬es
, c
);
5614 /* JF this next line is so demand_copy_C_string will return a
5615 null terminated string. */
5616 obstack_1grow (¬es
, '\0');
5617 retval
= (char *) obstack_finish (¬es
);
5621 as_bad (_("missing string"));
5623 ignore_rest_of_line ();
5629 /* In: Input_line_pointer->next character.
5631 Do: Skip input_line_pointer over all whitespace.
5633 Out: 1 if input_line_pointer->end-of-line. */
5636 is_it_end_of_statement (void)
5639 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
5643 equals (char *sym_name
, int reassign
)
5648 input_line_pointer
++;
5649 if (*input_line_pointer
== '=')
5650 input_line_pointer
++;
5651 if (reassign
< 0 && *input_line_pointer
== '=')
5652 input_line_pointer
++;
5654 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
5655 input_line_pointer
++;
5658 stop
= mri_comment_field (&stopc
);
5660 assign_symbol (sym_name
, reassign
>= 0 ? !reassign
: reassign
);
5664 demand_empty_rest_of_line ();
5665 mri_comment_end (stop
, stopc
);
5669 /* .incbin -- include a file verbatim at the current location. */
5672 s_incbin (int x ATTRIBUTE_UNUSED
)
5683 #ifdef md_flush_pending_output
5684 md_flush_pending_output ();
5687 #ifdef md_cons_align
5692 filename
= demand_copy_string (& len
);
5693 if (filename
== NULL
)
5698 /* Look for optional skip and count. */
5699 if (* input_line_pointer
== ',')
5701 ++ input_line_pointer
;
5702 skip
= get_absolute_expression ();
5706 if (* input_line_pointer
== ',')
5708 ++ input_line_pointer
;
5710 count
= get_absolute_expression ();
5712 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
5718 demand_empty_rest_of_line ();
5720 /* Try opening absolute path first, then try include dirs. */
5721 binfile
= fopen (filename
, FOPEN_RB
);
5722 if (binfile
== NULL
)
5726 path
= (char *) xmalloc ((unsigned long) len
+ include_dir_maxlen
+ 5);
5728 for (i
= 0; i
< include_dir_count
; i
++)
5730 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
5732 binfile
= fopen (path
, FOPEN_RB
);
5733 if (binfile
!= NULL
)
5737 if (binfile
== NULL
)
5738 as_bad (_("file not found: %s"), filename
);
5741 path
= xstrdup (filename
);
5747 register_dependency (path
);
5749 /* Compute the length of the file. */
5750 if (fseek (binfile
, 0, SEEK_END
) != 0)
5752 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
5755 file_len
= ftell (binfile
);
5757 /* If a count was not specified use the remainder of the file. */
5759 count
= file_len
- skip
;
5761 if (skip
< 0 || count
< 0 || file_len
< 0 || skip
+ count
> file_len
)
5763 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5764 skip
, count
, file_len
);
5768 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
5770 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
5774 /* Allocate frag space and store file contents in it. */
5775 binfrag
= frag_more (count
);
5777 bytes
= fread (binfrag
, 1, count
, binfile
);
5779 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5780 path
, bytes
, count
);
5783 if (binfile
!= NULL
)
5789 /* .include -- include a file at this point. */
5792 s_include (int arg ATTRIBUTE_UNUSED
)
5801 filename
= demand_copy_string (&i
);
5802 if (filename
== NULL
)
5804 /* demand_copy_string has already printed an error and
5805 called ignore_rest_of_line. */
5813 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
5814 && *input_line_pointer
!= ' '
5815 && *input_line_pointer
!= '\t')
5817 obstack_1grow (¬es
, *input_line_pointer
);
5818 ++input_line_pointer
;
5822 obstack_1grow (¬es
, '\0');
5823 filename
= (char *) obstack_finish (¬es
);
5824 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5825 ++input_line_pointer
;
5828 demand_empty_rest_of_line ();
5829 path
= (char *) xmalloc ((unsigned long) i
5830 + include_dir_maxlen
+ 5 /* slop */ );
5832 for (i
= 0; i
< include_dir_count
; i
++)
5834 strcpy (path
, include_dirs
[i
]);
5836 strcat (path
, filename
);
5837 if (0 != (try_file
= fopen (path
, FOPEN_RT
)))
5847 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5848 register_dependency (path
);
5849 input_scrub_insert_file (path
);
5853 add_include_dir (char *path
)
5857 if (include_dir_count
== 0)
5859 include_dirs
= (char **) xmalloc (2 * sizeof (*include_dirs
));
5860 include_dirs
[0] = "."; /* Current dir. */
5861 include_dir_count
= 2;
5865 include_dir_count
++;
5867 (char **) xrealloc (include_dirs
,
5868 include_dir_count
* sizeof (*include_dirs
));
5871 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
5874 if (i
> include_dir_maxlen
)
5875 include_dir_maxlen
= i
;
5878 /* Output debugging information to denote the source file. */
5881 generate_file_debug (void)
5883 if (debug_type
== DEBUG_STABS
)
5884 stabs_generate_asm_file ();
5887 /* Output line number debugging information for the current source line. */
5890 generate_lineno_debug (void)
5894 case DEBUG_UNSPECIFIED
:
5899 stabs_generate_asm_lineno ();
5902 ecoff_generate_asm_lineno ();
5905 /* ??? We could here indicate to dwarf2dbg.c that something
5906 has changed. However, since there is additional backend
5907 support that is required (calling dwarf2_emit_insn), we
5908 let dwarf2dbg.c call as_where on its own. */
5913 /* Output debugging information to mark a function entry point or end point.
5914 END_P is zero for .func, and non-zero for .endfunc. */
5919 do_s_func (end_p
, NULL
);
5922 /* Subroutine of s_func so targets can choose a different default prefix.
5923 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5926 do_s_func (int end_p
, const char *default_prefix
)
5928 /* Record the current function so that we can issue an error message for
5929 misplaced .func,.endfunc, and also so that .endfunc needs no
5931 static char *current_name
;
5932 static char *current_label
;
5936 if (current_name
== NULL
)
5938 as_bad (_("missing .func"));
5939 ignore_rest_of_line ();
5943 if (debug_type
== DEBUG_STABS
)
5944 stabs_generate_asm_endfunc (current_name
, current_label
);
5946 current_name
= current_label
= NULL
;
5951 char delim1
, delim2
;
5953 if (current_name
!= NULL
)
5955 as_bad (_(".endfunc missing for previous .func"));
5956 ignore_rest_of_line ();
5960 name
= input_line_pointer
;
5961 delim1
= get_symbol_end ();
5962 name
= xstrdup (name
);
5963 *input_line_pointer
= delim1
;
5965 if (*input_line_pointer
!= ',')
5969 if (asprintf (&label
, "%s%s", default_prefix
, name
) == -1)
5970 as_fatal ("%s", xstrerror (errno
));
5974 char leading_char
= bfd_get_symbol_leading_char (stdoutput
);
5975 /* Missing entry point, use function's name with the leading
5979 if (asprintf (&label
, "%c%s", leading_char
, name
) == -1)
5980 as_fatal ("%s", xstrerror (errno
));
5988 ++input_line_pointer
;
5990 label
= input_line_pointer
;
5991 delim2
= get_symbol_end ();
5992 label
= xstrdup (label
);
5993 *input_line_pointer
= delim2
;
5996 if (debug_type
== DEBUG_STABS
)
5997 stabs_generate_asm_func (name
, label
);
5999 current_name
= name
;
6000 current_label
= label
;
6003 demand_empty_rest_of_line ();
6006 #ifdef HANDLE_BUNDLE
6009 s_bundle_align_mode (int arg ATTRIBUTE_UNUSED
)
6011 unsigned int align
= get_absolute_expression ();
6013 demand_empty_rest_of_line ();
6015 if (align
> (unsigned int) TC_ALIGN_LIMIT
)
6016 as_fatal (_(".bundle_align_mode alignment too large (maximum %u)"),
6017 (unsigned int) TC_ALIGN_LIMIT
);
6019 if (bundle_lock_frag
!= NULL
)
6021 as_bad (_("cannot change .bundle_align_mode inside .bundle_lock"));
6025 bundle_align_p2
= align
;
6029 s_bundle_lock (int arg ATTRIBUTE_UNUSED
)
6031 demand_empty_rest_of_line ();
6033 if (bundle_align_p2
== 0)
6035 as_bad (_(".bundle_lock is meaningless without .bundle_align_mode"));
6039 if (bundle_lock_depth
== 0)
6041 bundle_lock_frchain
= frchain_now
;
6042 bundle_lock_frag
= start_bundle ();
6044 ++bundle_lock_depth
;
6048 s_bundle_unlock (int arg ATTRIBUTE_UNUSED
)
6052 demand_empty_rest_of_line ();
6054 if (bundle_lock_frag
== NULL
)
6056 as_bad (_(".bundle_unlock without preceding .bundle_lock"));
6060 gas_assert (bundle_align_p2
> 0);
6062 gas_assert (bundle_lock_depth
> 0);
6063 if (--bundle_lock_depth
> 0)
6066 size
= pending_bundle_size (bundle_lock_frag
);
6068 if (size
> (1U << bundle_align_p2
))
6069 as_bad (_(".bundle_lock sequence is %u bytes, but bundle size only %u"),
6070 size
, 1 << bundle_align_p2
);
6072 finish_bundle (bundle_lock_frag
, size
);
6074 bundle_lock_frag
= NULL
;
6075 bundle_lock_frchain
= NULL
;
6078 #endif /* HANDLE_BUNDLE */
6081 s_ignore (int arg ATTRIBUTE_UNUSED
)
6083 ignore_rest_of_line ();
6087 read_print_statistics (FILE *file
)
6089 hash_print_statistics (file
, "pseudo-op table", po_hash
);
6092 /* Inserts the given line into the input stream.
6094 This call avoids macro/conditionals nesting checking, since the contents of
6095 the line are assumed to replace the contents of a line already scanned.
6097 An appropriate use of this function would be substitution of input lines when
6098 called by md_start_line_hook(). The given line is assumed to already be
6099 properly scrubbed. */
6102 input_scrub_insert_line (const char *line
)
6105 size_t len
= strlen (line
);
6106 sb_build (&newline
, len
);
6107 sb_add_buffer (&newline
, line
, len
);
6108 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
6110 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
6113 /* Insert a file into the input stream; the path must resolve to an actual
6114 file; no include path searching or dependency registering is performed. */
6117 input_scrub_insert_file (char *path
)
6119 input_scrub_include_file (path
, input_line_pointer
);
6120 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
6123 /* Find the end of a line, considering quotation and escaping of quotes. */
6125 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
6126 # define TC_SINGLE_QUOTE_STRINGS 1
6130 _find_end_of_line (char *s
, int mri_string
, int insn ATTRIBUTE_UNUSED
,
6133 char inquote
= '\0';
6136 while (!is_end_of_line
[(unsigned char) *s
]
6137 || (inquote
&& !ISCNTRL (*s
))
6138 || (inquote
== '\'' && flag_mri
)
6139 #ifdef TC_EOL_IN_INSN
6140 || (insn
&& TC_EOL_IN_INSN (s
))
6142 /* PR 6926: When we are parsing the body of a macro the sequence
6143 \@ is special - it refers to the invocation count. If the @
6144 character happens to be registered as a line-separator character
6145 by the target, then the is_end_of_line[] test above will have
6146 returned true, but we need to ignore the line separating
6147 semantics in this particular case. */
6148 || (in_macro
&& inescape
&& *s
== '@')
6151 if (mri_string
&& *s
== '\'')
6155 else if (*s
== '\\')
6159 #ifdef TC_SINGLE_QUOTE_STRINGS
6160 || (TC_SINGLE_QUOTE_STRINGS
&& *s
== '\'')
6167 as_warn (_("missing closing `%c'"), inquote
);
6168 if (inescape
&& !ignore_input ())
6169 as_warn (_("stray `\\'"));
6174 find_end_of_line (char *s
, int mri_string
)
6176 return _find_end_of_line (s
, mri_string
, 0, 0);