1 /* read.c - read a source file -
2 Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
3 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
4 2010 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
23 /* If your chars aren't 8 bits, you will change this a bit (eg. to 0xFF).
24 But then, GNU isn't spozed to run on your machine anyway.
25 (RMS is so shortsighted sometimes.) */
26 #define MASK_CHAR ((int)(unsigned char) -1)
28 /* This is the largest known floating point format (for now). It will
29 grow when we do 4361 style flonums. */
30 #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
32 /* Routines that read assembler source text to build spaghetti in memory.
33 Another group of these functions is in the expr.c module. */
36 #include "safe-ctype.h"
42 #include "dw2gencfi.h"
44 #ifndef TC_START_LABEL
45 #define TC_START_LABEL(x,y,z) (x == ':')
48 /* Set by the object-format or the target. */
49 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
50 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
55 else if ((SIZE) >= 4) \
57 else if ((SIZE) >= 2) \
65 char *input_line_pointer
; /*->next char of source file to parse. */
67 #if BITS_PER_CHAR != 8
68 /* The following table is indexed by[(char)] and will break if
69 a char does not have exactly 256 states (hopefully 0:255!)! */
78 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
83 /* The Delta 68k assembler permits % inside label names. */
88 /* The PowerPC Windows NT assemblers permits ? inside label names. */
93 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
94 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
103 /* The Delta 68k assembler permits ~ at start of label names. */
107 /* Used by is_... macros. our ctype[]. */
108 char lex_type
[256] = {
109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
110 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
111 0, 0, 0, LEX_HASH
, LEX_DOLLAR
, LEX_PCT
, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
112 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM
, /* 0123456789:;<=>? */
113 LEX_AT
, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
114 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, 0, 3, /* PQRSTUVWXYZ[\]^_ */
115 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
116 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, LEX_TILDE
, 0, /* pqrstuvwxyz{|}~. */
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,
124 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
128 Out: 1 if this character ends a line.
129 2 if this character is a line separator. */
130 char is_end_of_line
[256] = {
132 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
134 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
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, /* _!"#$%&'()*+,-./ */
138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
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, /* */
150 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
153 #ifndef TC_CASE_SENSITIVE
154 char original_case_string
[128];
157 /* Functions private to this file. */
159 static char *buffer
; /* 1st char of each buffer of lines is here. */
160 static char *buffer_limit
; /*->1 + last char in buffer. */
162 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
163 in the tc-<CPU>.h file. See the "Porting GAS" section of the
165 int target_big_endian
= TARGET_BYTES_BIG_ENDIAN
;
167 /* Variables for handling include file directory table. */
169 /* Table of pointers to directories to search for .include's. */
172 /* How many are in the table. */
173 int include_dir_count
;
175 /* Length of longest in table. */
176 int include_dir_maxlen
= 1;
178 #ifndef WORKING_DOT_WORD
179 struct broken_word
*broken_words
;
180 int new_broken_words
;
183 /* The current offset into the absolute section. We don't try to
184 build frags in the absolute section, since no data can be stored
185 there. We just keep track of the current offset. */
186 addressT abs_section_offset
;
188 /* If this line had an MRI style label, it is stored in this variable.
189 This is used by some of the MRI pseudo-ops. */
192 /* This global variable is used to support MRI common sections. We
193 translate such sections into a common symbol. This variable is
194 non-NULL when we are in an MRI common section. */
195 symbolS
*mri_common_symbol
;
197 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
198 need to align to an even byte boundary unless the next pseudo-op is
199 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
201 static int mri_pending_align
;
205 /* This variable is set to be non-zero if the next string we see might
206 be the name of the source file in DWARF debugging information. See
207 the comment in emit_expr for the format we look for. */
208 static int dwarf_file_string
;
212 static void do_s_func (int end_p
, const char *default_prefix
);
213 static void do_align (int, char *, int, int);
214 static void s_align (int, int);
215 static void s_altmacro (int);
216 static void s_bad_end (int);
218 static void s_gnu_attribute (int);
220 static void s_reloc (int);
221 static int hex_float (int, char *);
222 static segT
get_known_segmented_expression (expressionS
* expP
);
223 static void pobegin (void);
224 static int get_non_macro_line_sb (sb
*);
225 static void generate_file_debug (void);
226 static char *_find_end_of_line (char *, int, int, int);
234 obj_read_begin_hook ();
236 /* Something close -- but not too close -- to a multiple of 1024.
237 The debugging malloc I'm using has 24 bytes of overhead. */
238 obstack_begin (¬es
, chunksize
);
239 obstack_begin (&cond_obstack
, chunksize
);
241 /* Use machine dependent syntax. */
242 for (p
= line_separator_chars
; *p
; p
++)
243 is_end_of_line
[(unsigned char) *p
] = 2;
244 /* Use more. FIXME-SOMEDAY. */
250 #ifndef TC_ADDRESS_BYTES
251 #define TC_ADDRESS_BYTES address_bytes
256 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
257 contain an address. */
258 int n
= (stdoutput
->arch_info
->bits_per_address
- 1) / 8;
266 /* Set up pseudo-op tables. */
268 static struct hash_control
*po_hash
;
270 static const pseudo_typeS potable
[] = {
271 {"abort", s_abort
, 0},
272 {"align", s_align_ptwo
, 0},
273 {"altmacro", s_altmacro
, 1},
274 {"ascii", stringer
, 8+0},
275 {"asciz", stringer
, 8+1},
276 {"balign", s_align_bytes
, 0},
277 {"balignw", s_align_bytes
, -2},
278 {"balignl", s_align_bytes
, -4},
282 {"common", s_mri_common
, 0},
283 {"common.s", s_mri_common
, 1},
286 #ifdef TC_ADDRESS_BYTES
290 {"dc.d", float_cons
, 'd'},
292 {"dc.s", float_cons
, 'f'},
294 {"dc.x", float_cons
, 'x'},
296 {"dcb.b", s_space
, 1},
297 {"dcb.d", s_float_space
, 'd'},
298 {"dcb.l", s_space
, 4},
299 {"dcb.s", s_float_space
, 'f'},
300 {"dcb.w", s_space
, 2},
301 {"dcb.x", s_float_space
, 'x'},
303 {"ds.b", s_space
, 1},
304 {"ds.d", s_space
, 8},
305 {"ds.l", s_space
, 4},
306 {"ds.p", s_space
, 12},
307 {"ds.s", s_space
, 4},
308 {"ds.w", s_space
, 2},
309 {"ds.x", s_space
, 12},
310 {"debug", s_ignore
, 0},
315 {"double", float_cons
, 'd'},
317 {"eject", listing_eject
, 0}, /* Formfeed listing. */
319 {"elsec", s_else
, 0},
320 {"elseif", s_elseif
, (int) O_ne
},
322 {"endc", s_endif
, 0},
323 {"endfunc", s_func
, 1},
324 {"endif", s_endif
, 0},
325 {"endm", s_bad_end
, 0},
326 {"endr", s_bad_end
, 1},
332 {"error", s_errwarn
, 1},
333 {"exitm", s_mexit
, 0},
335 {"extern", s_ignore
, 0}, /* We treat all undef as ext. */
336 {"appfile", s_app_file
, 1},
337 {"appline", s_app_line
, 1},
339 {"file", s_app_file
, 0},
341 {"float", float_cons
, 'f'},
342 {"format", s_ignore
, 0},
344 {"global", s_globl
, 0},
345 {"globl", s_globl
, 0},
347 {"gnu_attribute", s_gnu_attribute
, 0},
350 {"if", s_if
, (int) O_ne
},
353 {"ifdef", s_ifdef
, 0},
354 {"ifeq", s_if
, (int) O_eq
},
355 {"ifeqs", s_ifeqs
, 0},
356 {"ifge", s_if
, (int) O_ge
},
357 {"ifgt", s_if
, (int) O_gt
},
358 {"ifle", s_if
, (int) O_le
},
359 {"iflt", s_if
, (int) O_lt
},
362 {"ifndef", s_ifdef
, 1},
363 {"ifne", s_if
, (int) O_ne
},
364 {"ifnes", s_ifeqs
, 1},
365 {"ifnotdef", s_ifdef
, 1},
366 {"incbin", s_incbin
, 0},
367 {"include", s_include
, 0},
373 {"lcomm", s_lcomm
, 0},
374 {"lflags", s_ignore
, 0}, /* Listing flags. */
375 {"linefile", s_app_line
, 0},
376 {"linkonce", s_linkonce
, 0},
377 {"list", listing_list
, 1}, /* Turn listing on. */
378 {"llen", listing_psize
, 1},
381 {"macro", s_macro
, 0},
382 {"mexit", s_mexit
, 0},
384 {".mri", s_mri
, 0}, /* Special case so .mri works in MRI mode. */
385 {"name", s_ignore
, 0},
386 {"noaltmacro", s_altmacro
, 0},
387 {"noformat", s_ignore
, 0},
388 {"nolist", listing_list
, 0}, /* Turn listing off. */
389 {"nopage", listing_nopage
, 0},
391 {"offset", s_struct
, 0},
393 {"p2align", s_align_ptwo
, 0},
394 {"p2alignw", s_align_ptwo
, -2},
395 {"p2alignl", s_align_ptwo
, -4},
396 {"page", listing_eject
, 0},
397 {"plen", listing_psize
, 0},
398 {"print", s_print
, 0},
399 {"psize", listing_psize
, 0}, /* Set paper size. */
400 {"purgem", s_purgem
, 0},
402 {"reloc", s_reloc
, 0},
406 {"sbttl", listing_title
, 1}, /* Subtitle of listing. */
411 {"single", float_cons
, 'f'},
413 {"space", s_space
, 0},
414 {"skip", s_space
, 0},
415 {"sleb128", s_leb128
, 1},
416 {"spc", s_ignore
, 0},
417 {"stabd", s_stab
, 'd'},
418 {"stabn", s_stab
, 'n'},
419 {"stabs", s_stab
, 's'},
420 {"string", stringer
, 8+1},
421 {"string8", stringer
, 8+1},
422 {"string16", stringer
, 16+1},
423 {"string32", stringer
, 32+1},
424 {"string64", stringer
, 64+1},
425 {"struct", s_struct
, 0},
429 /* This is for gcc to use. It's only just been added (2/94), so gcc
430 won't be able to use it for a while -- probably a year or more.
431 But once this has been released, check with gcc maintainers
432 before deleting it or even changing the spelling. */
433 {"this_GCC_requires_the_GNU_assembler", s_ignore
, 0},
434 /* If we're folding case -- done for some targets, not necessarily
435 all -- the above string in an input file will be converted to
436 this one. Match it either way... */
437 {"this_gcc_requires_the_gnu_assembler", s_ignore
, 0},
439 {"title", listing_title
, 0}, /* Listing title. */
440 {"ttl", listing_title
, 0},
442 {"uleb128", s_leb128
, 0},
446 {"xdef", s_globl
, 0},
447 {"xref", s_ignore
, 0},
448 {"xstabs", s_xstab
, 's'},
449 {"warning", s_errwarn
, 0},
450 {"weakref", s_weakref
, 0},
452 {"zero", s_space
, 0},
453 {NULL
, NULL
, 0} /* End sentinel. */
457 get_absolute_expr (expressionS
*exp
)
459 expression_and_evaluate (exp
);
460 if (exp
->X_op
!= O_constant
)
462 if (exp
->X_op
!= O_absent
)
463 as_bad (_("bad or irreducible absolute expression"));
464 exp
->X_add_number
= 0;
466 return exp
->X_add_number
;
470 get_absolute_expression (void)
474 return get_absolute_expr (&exp
);
477 static int pop_override_ok
= 0;
478 static const char *pop_table_name
;
481 pop_insert (const pseudo_typeS
*table
)
484 const pseudo_typeS
*pop
;
485 for (pop
= table
; pop
->poc_name
; pop
++)
487 errtxt
= hash_insert (po_hash
, pop
->poc_name
, (char *) pop
);
488 if (errtxt
&& (!pop_override_ok
|| strcmp (errtxt
, "exists")))
489 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name
,
494 #ifndef md_pop_insert
495 #define md_pop_insert() pop_insert(md_pseudo_table)
498 #ifndef obj_pop_insert
499 #define obj_pop_insert() pop_insert(obj_pseudo_table)
502 #ifndef cfi_pop_insert
503 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
509 po_hash
= hash_new ();
511 /* Do the target-specific pseudo ops. */
512 pop_table_name
= "md";
515 /* Now object specific. Skip any that were in the target table. */
516 pop_table_name
= "obj";
520 /* Now portable ones. Skip any that we've seen already. */
521 pop_table_name
= "standard";
522 pop_insert (potable
);
525 pop_table_name
= "cfi";
530 #define HANDLE_CONDITIONAL_ASSEMBLY() \
531 if (ignore_input ()) \
533 char *eol = find_end_of_line (input_line_pointer, flag_m68k_mri); \
534 input_line_pointer = (input_line_pointer <= buffer_limit \
535 && eol >= buffer_limit) \
541 /* This function is used when scrubbing the characters between #APP
544 static char *scrub_string
;
545 static char *scrub_string_end
;
548 scrub_from_string (char *buf
, int buflen
)
552 copy
= scrub_string_end
- scrub_string
;
555 memcpy (buf
, scrub_string
, copy
);
556 scrub_string
+= copy
;
560 /* Helper function of read_a_source_file, which tries to expand a macro. */
562 try_macro (char term
, const char *line
)
568 if (check_macro (line
, &out
, &err
, ¯o
))
572 *input_line_pointer
++ = term
;
573 input_scrub_include_sb (&out
,
574 input_line_pointer
, 1);
577 input_scrub_next_buffer (&input_line_pointer
);
579 md_macro_info (macro
);
586 /* We read the file, putting things into a web that represents what we
587 have been reading. */
589 read_a_source_file (char *name
)
592 char *s
; /* String of symbol, '\0' appended. */
600 buffer
= input_scrub_new_file (name
);
603 listing_newline (NULL
);
604 register_dependency (name
);
606 /* Generate debugging information before we've read anything in to denote
607 this file as the "main" source file and not a subordinate one
608 (e.g. N_SO vs N_SOL in stabs). */
609 generate_file_debug ();
611 while ((buffer_limit
= input_scrub_next_buffer (&input_line_pointer
)) != 0)
612 { /* We have another line to parse. */
614 /* In order to avoid listing macro expansion lines with labels
615 multiple times, keep track of which line was last issued. */
616 static char *last_eol
;
620 while (input_line_pointer
< buffer_limit
)
622 bfd_boolean was_new_line
;
623 /* We have more of this buffer to parse. */
625 /* We now have input_line_pointer->1st char of next line.
626 If input_line_pointer [-1] == '\n' then we just
627 scanned another line: so bump line counters. */
628 was_new_line
= is_end_of_line
[(unsigned char) input_line_pointer
[-1]];
631 symbol_set_value_now (&dot_symbol
);
632 #ifdef md_start_line_hook
633 md_start_line_hook ();
635 if (input_line_pointer
[-1] == '\n')
636 bump_line_counters ();
640 /* If listing is on, and we are expanding a macro, then give
641 the listing code the contents of the expanded line. */
644 if ((listing
& LISTING_MACEXP
) && macro_nest
> 0)
646 /* Find the end of the current expanded macro line. */
647 s
= find_end_of_line (input_line_pointer
, flag_m68k_mri
);
655 /* Copy it for safe keeping. Also give an indication of
656 how much macro nesting is involved at this point. */
657 len
= s
- input_line_pointer
;
658 copy
= (char *) xmalloc (len
+ macro_nest
+ 2);
659 memset (copy
, '>', macro_nest
);
660 copy
[macro_nest
] = ' ';
661 memcpy (copy
+ macro_nest
+ 1, input_line_pointer
, len
);
662 copy
[macro_nest
+ 1 + len
] = '\0';
664 /* Install the line with the listing facility. */
665 listing_newline (copy
);
669 listing_newline (NULL
);
676 if (LABELS_WITHOUT_COLONS
|| flag_m68k_mri
)
678 /* Text at the start of a line must be a label, we
679 run down and stick a colon in. */
680 if (is_name_beginner (*input_line_pointer
))
682 char *line_start
= input_line_pointer
;
685 HANDLE_CONDITIONAL_ASSEMBLY ();
687 c
= get_symbol_end ();
689 /* In MRI mode, the EQU and MACRO pseudoops must
690 be handled specially. */
694 char *rest
= input_line_pointer
+ 1;
698 if (*rest
== ' ' || *rest
== '\t')
700 if ((strncasecmp (rest
, "EQU", 3) == 0
701 || strncasecmp (rest
, "SET", 3) == 0)
702 && (rest
[3] == ' ' || rest
[3] == '\t'))
704 input_line_pointer
= rest
+ 3;
706 strncasecmp (rest
, "SET", 3) == 0);
709 if (strncasecmp (rest
, "MACRO", 5) == 0
712 || is_end_of_line
[(unsigned char) rest
[5]]))
716 /* In MRI mode, we need to handle the MACRO
717 pseudo-op specially: we don't want to put the
718 symbol in the symbol table. */
720 #ifdef TC_START_LABEL_WITHOUT_COLON
721 && TC_START_LABEL_WITHOUT_COLON(c
,
725 line_label
= colon (line_start
);
727 line_label
= symbol_create (line_start
,
732 *input_line_pointer
= c
;
734 input_line_pointer
++;
739 /* We are at the beginning of a line, or similar place.
740 We expect a well-formed assembler statement.
741 A "symbol-name:" is a statement.
743 Depending on what compiler is used, the order of these tests
744 may vary to catch most common case 1st.
745 Each test is independent of all other tests at the (top)
748 c
= *input_line_pointer
++;
749 while (c
== '\t' || c
== ' ' || c
== '\f');
751 /* C is the 1st significant character.
752 Input_line_pointer points after that character. */
753 if (is_name_beginner (c
))
755 /* Want user-defined label or pseudo/opcode. */
756 HANDLE_CONDITIONAL_ASSEMBLY ();
758 s
= --input_line_pointer
;
759 c
= get_symbol_end (); /* name's delimiter. */
761 /* C is character after symbol.
762 That character's place in the input line is now '\0'.
763 S points to the beginning of the symbol.
764 [In case of pseudo-op, s->'.'.]
765 Input_line_pointer->'\0' where c was. */
766 if (TC_START_LABEL (c
, s
, input_line_pointer
))
770 char *rest
= input_line_pointer
+ 1;
772 /* In MRI mode, \tsym: set 0 is permitted. */
776 if (*rest
== ' ' || *rest
== '\t')
779 if ((strncasecmp (rest
, "EQU", 3) == 0
780 || strncasecmp (rest
, "SET", 3) == 0)
781 && (rest
[3] == ' ' || rest
[3] == '\t'))
783 input_line_pointer
= rest
+ 3;
789 line_label
= colon (s
); /* User-defined label. */
790 /* Put ':' back for error messages' sake. */
791 *input_line_pointer
++ = ':';
792 #ifdef tc_check_label
793 tc_check_label (line_label
);
795 /* Input_line_pointer->after ':'. */
798 else if ((c
== '=' && input_line_pointer
[1] == '=')
799 || ((c
== ' ' || c
== '\t')
800 && input_line_pointer
[1] == '='
801 && input_line_pointer
[2] == '='))
804 demand_empty_rest_of_line ();
807 || ((c
== ' ' || c
== '\t')
808 && input_line_pointer
[1] == '='))
809 #ifdef TC_EQUAL_IN_INSN
810 && !TC_EQUAL_IN_INSN (c
, s
)
815 demand_empty_rest_of_line ();
819 /* Expect pseudo-op or machine instruction. */
822 #ifndef TC_CASE_SENSITIVE
826 strncpy (original_case_string
, s2
, sizeof (original_case_string
));
827 original_case_string
[sizeof (original_case_string
) - 1] = 0;
836 if (NO_PSEUDO_DOT
|| flag_m68k_mri
)
838 /* The MRI assembler uses pseudo-ops without
840 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
);
841 if (pop
!= NULL
&& pop
->poc_handler
== NULL
)
846 || (!flag_m68k_mri
&& *s
== '.'))
850 WARNING: c has next char, which may be end-of-line.
851 We lookup the pseudo-op table with s+1 because we
852 already know that the pseudo-op begins with a '.'. */
855 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
+ 1);
856 if (pop
&& !pop
->poc_handler
)
859 /* In MRI mode, we may need to insert an
860 automatic alignment directive. What a hack
862 if (mri_pending_align
864 || !((pop
->poc_handler
== cons
865 && pop
->poc_val
== 1)
866 || (pop
->poc_handler
== s_space
867 && pop
->poc_val
== 1)
868 #ifdef tc_conditional_pseudoop
869 || tc_conditional_pseudoop (pop
)
871 || pop
->poc_handler
== s_if
872 || pop
->poc_handler
== s_ifdef
873 || pop
->poc_handler
== s_ifc
874 || pop
->poc_handler
== s_ifeqs
875 || pop
->poc_handler
== s_else
876 || pop
->poc_handler
== s_endif
877 || pop
->poc_handler
== s_globl
878 || pop
->poc_handler
== s_ignore
)))
880 do_align (1, (char *) NULL
, 0, 0);
881 mri_pending_align
= 0;
883 if (line_label
!= NULL
)
885 symbol_set_frag (line_label
, frag_now
);
886 S_SET_VALUE (line_label
, frag_now_fix ());
890 /* Print the error msg now, while we still can. */
893 char *end
= input_line_pointer
;
895 *input_line_pointer
= c
;
897 c
= *--input_line_pointer
;
898 *input_line_pointer
= '\0';
899 if (! macro_defined
|| ! try_macro (c
, s
))
902 as_bad (_("unknown pseudo-op: `%s'"), s
);
903 *input_line_pointer
++ = c
;
908 /* Put it back for error messages etc. */
909 *input_line_pointer
= c
;
910 /* The following skip of whitespace is compulsory.
911 A well shaped space is sometimes all that separates
912 keyword from operands. */
913 if (c
== ' ' || c
== '\t')
914 input_line_pointer
++;
916 /* Input_line is restored.
917 Input_line_pointer->1st non-blank char
918 after pseudo-operation. */
919 (*pop
->poc_handler
) (pop
->poc_val
);
921 /* If that was .end, just get out now. */
922 if (pop
->poc_handler
== s_end
)
927 /* WARNING: c has char, which may be end-of-line. */
928 /* Also: input_line_pointer->`\0` where c was. */
929 *input_line_pointer
= c
;
930 input_line_pointer
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 1, 0);
931 c
= *input_line_pointer
;
932 *input_line_pointer
= '\0';
934 generate_lineno_debug ();
936 if (macro_defined
&& try_macro (c
, s
))
939 if (mri_pending_align
)
941 do_align (1, (char *) NULL
, 0, 0);
942 mri_pending_align
= 0;
943 if (line_label
!= NULL
)
945 symbol_set_frag (line_label
, frag_now
);
946 S_SET_VALUE (line_label
, frag_now_fix ());
950 md_assemble (s
); /* Assemble 1 instruction. */
952 *input_line_pointer
++ = c
;
954 /* We resume loop AFTER the end-of-line from
961 /* Empty statement? */
962 if (is_end_of_line
[(unsigned char) c
])
965 if ((LOCAL_LABELS_DOLLAR
|| LOCAL_LABELS_FB
) && ISDIGIT (c
))
967 /* local label ("4:") */
968 char *backup
= input_line_pointer
;
970 HANDLE_CONDITIONAL_ASSEMBLY ();
974 /* Read the whole number. */
975 while (ISDIGIT (*input_line_pointer
))
977 temp
= (temp
* 10) + *input_line_pointer
- '0';
978 ++input_line_pointer
;
981 if (LOCAL_LABELS_DOLLAR
982 && *input_line_pointer
== '$'
983 && *(input_line_pointer
+ 1) == ':')
985 input_line_pointer
+= 2;
987 if (dollar_label_defined (temp
))
989 as_fatal (_("label \"%d$\" redefined"), temp
);
992 define_dollar_label (temp
);
993 colon (dollar_label_name (temp
, 0));
998 && *input_line_pointer
++ == ':')
1000 fb_label_instance_inc (temp
);
1001 colon (fb_label_name (temp
, 0));
1005 input_line_pointer
= backup
;
1006 } /* local label ("4:") */
1008 if (c
&& strchr (line_comment_chars
, c
))
1009 { /* Its a comment. Better say APP or NO_APP. */
1014 unsigned int new_length
;
1017 s
= input_line_pointer
;
1018 if (strncmp (s
, "APP\n", 4))
1021 ignore_rest_of_line ();
1024 bump_line_counters ();
1028 ends
= strstr (s
, "#NO_APP\n");
1032 unsigned int tmp_len
;
1035 /* The end of the #APP wasn't in this buffer. We
1036 keep reading in buffers until we find the #NO_APP
1037 that goes with this #APP There is one. The specs
1039 tmp_len
= buffer_limit
- s
;
1040 tmp_buf
= (char *) xmalloc (tmp_len
+ 1);
1041 memcpy (tmp_buf
, s
, tmp_len
);
1044 new_tmp
= input_scrub_next_buffer (&buffer
);
1048 buffer_limit
= new_tmp
;
1049 input_line_pointer
= buffer
;
1050 ends
= strstr (buffer
, "#NO_APP\n");
1052 num
= ends
- buffer
;
1054 num
= buffer_limit
- buffer
;
1056 tmp_buf
= (char *) xrealloc (tmp_buf
, tmp_len
+ num
);
1057 memcpy (tmp_buf
+ tmp_len
, buffer
, num
);
1062 input_line_pointer
= ends
? ends
+ 8 : NULL
;
1070 input_line_pointer
= ends
+ 8;
1074 scrub_string_end
= ends
;
1076 new_length
= ends
- s
;
1077 new_buf
= (char *) xmalloc (new_length
);
1084 space
= (new_buf
+ new_length
) - new_tmp
;
1085 size
= do_scrub_chars (scrub_from_string
, new_tmp
, space
);
1093 new_buf
= (char *) xrealloc (new_buf
, new_length
+ 100);
1094 new_tmp
= new_buf
+ new_length
;
1101 /* We've "scrubbed" input to the preferred format. In the
1102 process we may have consumed the whole of the remaining
1103 file (and included files). We handle this formatted
1104 input similar to that of macro expansion, letting
1105 actual macro expansion (possibly nested) and other
1106 input expansion work. Beware that in messages, line
1107 numbers and possibly file names will be incorrect. */
1108 sb_add_string (&sbuf
, new_buf
);
1109 input_scrub_include_sb (&sbuf
, input_line_pointer
, 0);
1111 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1116 HANDLE_CONDITIONAL_ASSEMBLY ();
1118 #ifdef tc_unrecognized_line
1119 if (tc_unrecognized_line (c
))
1122 input_line_pointer
--;
1123 /* Report unknown char as error. */
1124 demand_empty_rest_of_line ();
1127 #ifdef md_after_pass_hook
1128 md_after_pass_hook ();
1131 symbol_set_value_now (&dot_symbol
);
1138 /* Close the input file. */
1139 input_scrub_close ();
1140 #ifdef WARN_COMMENTS
1142 if (warn_comment
&& found_comment
)
1143 as_warn_where (found_comment_file
, found_comment
,
1144 "first comment found here");
1149 /* Convert O_constant expression EXP into the equivalent O_big representation.
1150 Take the sign of the number from X_unsigned rather than X_add_number. */
1153 convert_to_bignum (expressionS
*exp
)
1158 value
= exp
->X_add_number
;
1159 for (i
= 0; i
< sizeof (exp
->X_add_number
) / CHARS_PER_LITTLENUM
; i
++)
1161 generic_bignum
[i
] = value
& LITTLENUM_MASK
;
1162 value
>>= LITTLENUM_NUMBER_OF_BITS
;
1164 /* Add a sequence of sign bits if the top bit of X_add_number is not
1165 the sign of the original value. */
1166 if ((exp
->X_add_number
< 0) != !exp
->X_unsigned
)
1167 generic_bignum
[i
++] = exp
->X_unsigned
? 0 : LITTLENUM_MASK
;
1169 exp
->X_add_number
= i
;
1172 /* For most MRI pseudo-ops, the line actually ends at the first
1173 nonquoted space. This function looks for that point, stuffs a null
1174 in, and sets *STOPCP to the character that used to be there, and
1175 returns the location.
1177 Until I hear otherwise, I am going to assume that this is only true
1178 for the m68k MRI assembler. */
1181 mri_comment_field (char *stopcp
)
1187 know (flag_m68k_mri
);
1189 for (s
= input_line_pointer
;
1190 ((!is_end_of_line
[(unsigned char) *s
] && *s
!= ' ' && *s
!= '\t')
1198 for (s
= input_line_pointer
;
1199 !is_end_of_line
[(unsigned char) *s
];
1209 /* Skip to the end of an MRI comment field. */
1212 mri_comment_end (char *stop
, int stopc
)
1216 input_line_pointer
= stop
;
1218 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1219 ++input_line_pointer
;
1223 s_abort (int ignore ATTRIBUTE_UNUSED
)
1225 as_fatal (_(".abort detected. Abandoning ship."));
1228 /* Guts of .align directive. N is the power of two to which to align.
1229 FILL may be NULL, or it may point to the bytes of the fill pattern.
1230 LEN is the length of whatever FILL points to, if anything. MAX is
1231 the maximum number of characters to skip when doing the alignment,
1232 or 0 if there is no maximum. */
1235 do_align (int n
, char *fill
, int len
, int max
)
1237 if (now_seg
== absolute_section
)
1241 if (*fill
++ != '\0')
1243 as_warn (_("ignoring fill value in absolute section"));
1250 #ifdef md_flush_pending_output
1251 md_flush_pending_output ();
1254 md_do_align (n
, fill
, len
, max
, just_record_alignment
);
1257 /* Only make a frag if we HAVE to... */
1258 if (n
!= 0 && !need_pass_2
)
1262 if (subseg_text_p (now_seg
))
1263 frag_align_code (n
, max
);
1265 frag_align (n
, 0, max
);
1268 frag_align (n
, *fill
, max
);
1270 frag_align_pattern (n
, fill
, len
, max
);
1274 just_record_alignment
: ATTRIBUTE_UNUSED_LABEL
1277 record_alignment (now_seg
, n
- OCTETS_PER_BYTE_POWER
);
1280 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1281 (in bytes). A negative ARG is the negative of the length of the
1282 fill pattern. BYTES_P is non-zero if the alignment value should be
1283 interpreted as the byte boundary, rather than the power of 2. */
1284 #ifndef TC_ALIGN_LIMIT
1285 #define TC_ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1289 s_align (int arg
, int bytes_p
)
1291 unsigned int align_limit
= TC_ALIGN_LIMIT
;
1300 stop
= mri_comment_field (&stopc
);
1302 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1307 align
= arg
; /* Default value from pseudo-op table. */
1311 align
= get_absolute_expression ();
1317 /* Convert to a power of 2. */
1322 for (i
= 0; (align
& 1) == 0; align
>>= 1, ++i
)
1325 as_bad (_("alignment not a power of 2"));
1331 if (align
> align_limit
)
1333 align
= align_limit
;
1334 as_warn (_("alignment too large: %u assumed"), align
);
1337 if (*input_line_pointer
!= ',')
1344 ++input_line_pointer
;
1345 if (*input_line_pointer
== ',')
1349 fill
= get_absolute_expression ();
1354 if (*input_line_pointer
!= ',')
1358 ++input_line_pointer
;
1359 max
= get_absolute_expression ();
1366 as_warn (_("expected fill pattern missing"));
1367 do_align (align
, (char *) NULL
, 0, max
);
1382 do_align (align
, &fill_char
, fill_len
, max
);
1388 if ((size_t) fill_len
> sizeof ab
)
1390 md_number_to_chars (ab
, fill
, fill_len
);
1391 do_align (align
, ab
, fill_len
, max
);
1395 demand_empty_rest_of_line ();
1398 mri_comment_end (stop
, stopc
);
1401 /* Handle the .align pseudo-op on machines where ".align 4" means
1402 align to a 4 byte boundary. */
1405 s_align_bytes (int arg
)
1410 /* Handle the .align pseudo-op on machines where ".align 4" means align
1411 to a 2**4 boundary. */
1414 s_align_ptwo (int arg
)
1419 /* Switch in and out of alternate macro mode. */
1424 demand_empty_rest_of_line ();
1425 macro_set_alternate (on
);
1429 s_comm_internal (int param
,
1430 symbolS
*(*comm_parse_extra
) (int, symbolS
*, addressT
))
1436 symbolS
*symbolP
= NULL
;
1442 stop
= mri_comment_field (&stopc
);
1444 name
= input_line_pointer
;
1445 c
= get_symbol_end ();
1446 /* Just after name is now '\0'. */
1447 p
= input_line_pointer
;
1452 as_bad (_("expected symbol name"));
1453 ignore_rest_of_line ();
1459 /* Accept an optional comma after the name. The comma used to be
1460 required, but Irix 5 cc does not generate it for .lcomm. */
1461 if (*input_line_pointer
== ',')
1462 input_line_pointer
++;
1464 temp
= get_absolute_expr (&exp
);
1466 size
&= ((offsetT
) 2 << (stdoutput
->arch_info
->bits_per_address
- 1)) - 1;
1467 if (exp
.X_op
== O_absent
)
1469 as_bad (_("missing size expression"));
1470 ignore_rest_of_line ();
1473 else if (temp
!= size
|| !exp
.X_unsigned
)
1475 as_warn (_("size (%ld) out of range, ignored"), (long) temp
);
1476 ignore_rest_of_line ();
1481 symbolP
= symbol_find_or_make (name
);
1482 if ((S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
1483 && !S_IS_COMMON (symbolP
))
1485 if (!S_IS_VOLATILE (symbolP
))
1488 as_bad (_("symbol `%s' is already defined"), name
);
1490 ignore_rest_of_line ();
1493 symbolP
= symbol_clone (symbolP
, 1);
1494 S_SET_SEGMENT (symbolP
, undefined_section
);
1495 S_SET_VALUE (symbolP
, 0);
1496 symbol_set_frag (symbolP
, &zero_address_frag
);
1497 S_CLEAR_VOLATILE (symbolP
);
1500 size
= S_GET_VALUE (symbolP
);
1503 else if (size
!= temp
)
1504 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1505 name
, (long) size
, (long) temp
);
1508 if (comm_parse_extra
!= NULL
)
1509 symbolP
= (*comm_parse_extra
) (param
, symbolP
, size
);
1512 S_SET_VALUE (symbolP
, (valueT
) size
);
1513 S_SET_EXTERNAL (symbolP
);
1514 S_SET_SEGMENT (symbolP
, bfd_com_section_ptr
);
1517 extern int flag_one
;
1518 if (size
== 0 || !flag_one
)
1519 S_GET_OTHER (symbolP
) = const_flag
;
1524 demand_empty_rest_of_line ();
1527 mri_comment_end (stop
, stopc
);
1534 s_comm_internal (ignore
, NULL
);
1537 /* The MRI COMMON pseudo-op. We handle this by creating a common
1538 symbol with the appropriate name. We make s_space do the right
1539 thing by increasing the size. */
1542 s_mri_common (int small ATTRIBUTE_UNUSED
)
1558 stop
= mri_comment_field (&stopc
);
1562 name
= input_line_pointer
;
1563 if (!ISDIGIT (*name
))
1564 c
= get_symbol_end ();
1569 ++input_line_pointer
;
1571 while (ISDIGIT (*input_line_pointer
));
1573 c
= *input_line_pointer
;
1574 *input_line_pointer
= '\0';
1576 if (line_label
!= NULL
)
1578 alc
= (char *) xmalloc (strlen (S_GET_NAME (line_label
))
1579 + (input_line_pointer
- name
)
1581 sprintf (alc
, "%s%s", name
, S_GET_NAME (line_label
));
1586 sym
= symbol_find_or_make (name
);
1587 *input_line_pointer
= c
;
1591 if (*input_line_pointer
!= ',')
1595 ++input_line_pointer
;
1596 align
= get_absolute_expression ();
1599 if (S_IS_DEFINED (sym
) && !S_IS_COMMON (sym
))
1601 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym
));
1602 ignore_rest_of_line ();
1603 mri_comment_end (stop
, stopc
);
1607 S_SET_EXTERNAL (sym
);
1608 S_SET_SEGMENT (sym
, bfd_com_section_ptr
);
1609 mri_common_symbol
= sym
;
1613 S_SET_ALIGN (sym
, align
);
1618 if (line_label
!= NULL
)
1621 exp
.X_op
= O_symbol
;
1622 exp
.X_add_symbol
= sym
;
1623 exp
.X_add_number
= 0;
1624 symbol_set_value_expression (line_label
, &exp
);
1625 symbol_set_frag (line_label
, &zero_address_frag
);
1626 S_SET_SEGMENT (line_label
, expr_section
);
1629 /* FIXME: We just ignore the small argument, which distinguishes
1630 COMMON and COMMON.S. I don't know what we can do about it. */
1632 /* Ignore the type and hptype. */
1633 if (*input_line_pointer
== ',')
1634 input_line_pointer
+= 2;
1635 if (*input_line_pointer
== ',')
1636 input_line_pointer
+= 2;
1638 demand_empty_rest_of_line ();
1640 mri_comment_end (stop
, stopc
);
1644 s_data (int ignore ATTRIBUTE_UNUSED
)
1649 temp
= get_absolute_expression ();
1650 if (flag_readonly_data_in_text
)
1652 section
= text_section
;
1656 section
= data_section
;
1658 subseg_set (section
, (subsegT
) temp
);
1663 demand_empty_rest_of_line ();
1666 /* Handle the .appfile pseudo-op. This is automatically generated by
1667 do_scrub_chars when a preprocessor # line comment is seen with a
1668 file name. This default definition may be overridden by the object
1669 or CPU specific pseudo-ops. This function is also the default
1670 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1674 s_app_file_string (char *file
, int appfile ATTRIBUTE_UNUSED
)
1678 listing_source_file (file
);
1680 register_dependency (file
);
1682 obj_app_file (file
, appfile
);
1687 s_app_file (int appfile
)
1692 /* Some assemblers tolerate immediately following '"'. */
1693 if ((s
= demand_copy_string (&length
)) != 0)
1696 = (!new_logical_line_flags (s
, -1, 1) && appfile
);
1698 /* In MRI mode, the preprocessor may have inserted an extraneous
1701 && *input_line_pointer
== '\''
1702 && is_end_of_line
[(unsigned char) input_line_pointer
[1]])
1703 ++input_line_pointer
;
1705 demand_empty_rest_of_line ();
1707 s_app_file_string (s
, appfile
);
1712 get_linefile_number (int *flag
)
1716 if (*input_line_pointer
< '0' || *input_line_pointer
> '9')
1719 *flag
= get_absolute_expression ();
1724 /* Handle the .appline pseudo-op. This is automatically generated by
1725 do_scrub_chars when a preprocessor # line comment is seen. This
1726 default definition may be overridden by the object or CPU specific
1730 s_app_line (int appline
)
1735 /* The given number is that of the next line. */
1737 l
= get_absolute_expression ();
1738 else if (!get_linefile_number (&l
))
1740 ignore_rest_of_line ();
1747 /* Some of the back ends can't deal with non-positive line numbers.
1748 Besides, it's silly. GCC however will generate a line number of
1749 zero when it is pre-processing builtins for assembler-with-cpp files:
1753 We do not want to barf on this, especially since such files are used
1754 in the GCC and GDB testsuites. So we check for negative line numbers
1755 rather than non-positive line numbers. */
1756 as_warn (_("line numbers must be positive; line number %d rejected"),
1767 if (*input_line_pointer
== '"')
1768 file
= demand_copy_string (&length
);
1774 while (get_linefile_number (&this_flag
))
1777 /* From GCC's cpp documentation:
1778 1: start of a new file.
1779 2: returning to a file after having included
1781 3: following text comes from a system header file.
1782 4: following text should be treated as extern "C".
1784 4 is nonsensical for the assembler; 3, we don't
1785 care about, so we ignore it just in case a
1786 system header file is included while
1787 preprocessing assembly. So 1 and 2 are all we
1788 care about, and they are mutually incompatible.
1789 new_logical_line_flags() demands this. */
1792 if (flags
&& flags
!= (1 << this_flag
))
1793 as_warn (_("incompatible flag %i in line directive"),
1796 flags
|= 1 << this_flag
;
1801 /* We ignore these. */
1805 as_warn (_("unsupported flag %i in line directive"),
1810 if (!is_end_of_line
[(unsigned char)*input_line_pointer
])
1815 if (appline
|| file
)
1817 new_logical_line_flags (file
, l
, flags
);
1820 listing_source_line (l
);
1824 if (appline
|| file
)
1825 demand_empty_rest_of_line ();
1827 ignore_rest_of_line ();
1830 /* Handle the .end pseudo-op. Actually, the real work is done in
1831 read_a_source_file. */
1834 s_end (int ignore ATTRIBUTE_UNUSED
)
1838 /* The MRI assembler permits the start symbol to follow .end,
1839 but we don't support that. */
1841 if (!is_end_of_line
[(unsigned char) *input_line_pointer
]
1842 && *input_line_pointer
!= '*'
1843 && *input_line_pointer
!= '!')
1844 as_warn (_("start address not supported"));
1848 /* Handle the .err pseudo-op. */
1851 s_err (int ignore ATTRIBUTE_UNUSED
)
1853 as_bad (_(".err encountered"));
1854 demand_empty_rest_of_line ();
1857 /* Handle the .error and .warning pseudo-ops. */
1863 /* The purpose for the conditional assignment is not to
1864 internationalize the directive itself, but that we need a
1865 self-contained message, one that can be passed like the
1866 demand_copy_C_string return value, and with no assumption on the
1867 location of the name of the directive within the message. */
1869 = (err
? _(".error directive invoked in source file")
1870 : _(".warning directive invoked in source file"));
1872 if (!is_it_end_of_statement ())
1874 if (*input_line_pointer
!= '\"')
1876 as_bad (_("%s argument must be a string"),
1877 err
? ".error" : ".warning");
1878 ignore_rest_of_line ();
1882 msg
= demand_copy_C_string (&len
);
1890 as_warn ("%s", msg
);
1891 demand_empty_rest_of_line ();
1894 /* Handle the MRI fail pseudo-op. */
1897 s_fail (int ignore ATTRIBUTE_UNUSED
)
1904 stop
= mri_comment_field (&stopc
);
1906 temp
= get_absolute_expression ();
1908 as_warn (_(".fail %ld encountered"), (long) temp
);
1910 as_bad (_(".fail %ld encountered"), (long) temp
);
1912 demand_empty_rest_of_line ();
1915 mri_comment_end (stop
, stopc
);
1919 s_fill (int ignore ATTRIBUTE_UNUSED
)
1921 expressionS rep_exp
;
1926 #ifdef md_flush_pending_output
1927 md_flush_pending_output ();
1930 #ifdef md_cons_align
1934 get_known_segmented_expression (&rep_exp
);
1935 if (*input_line_pointer
== ',')
1937 input_line_pointer
++;
1938 size
= get_absolute_expression ();
1939 if (*input_line_pointer
== ',')
1941 input_line_pointer
++;
1942 fill
= get_absolute_expression ();
1946 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1947 #define BSD_FILL_SIZE_CROCK_8 (8)
1948 if (size
> BSD_FILL_SIZE_CROCK_8
)
1950 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8
);
1951 size
= BSD_FILL_SIZE_CROCK_8
;
1955 as_warn (_("size negative; .fill ignored"));
1958 else if (rep_exp
.X_op
== O_constant
&& rep_exp
.X_add_number
<= 0)
1960 if (rep_exp
.X_add_number
< 0)
1961 as_warn (_("repeat < 0; .fill ignored"));
1965 if (size
&& !need_pass_2
)
1967 if (rep_exp
.X_op
== O_constant
)
1969 p
= frag_var (rs_fill
, (int) size
, (int) size
,
1970 (relax_substateT
) 0, (symbolS
*) 0,
1971 (offsetT
) rep_exp
.X_add_number
,
1976 /* We don't have a constant repeat count, so we can't use
1977 rs_fill. We can get the same results out of rs_space,
1978 but its argument is in bytes, so we must multiply the
1979 repeat count by size. */
1982 rep_sym
= make_expr_symbol (&rep_exp
);
1985 expressionS size_exp
;
1986 size_exp
.X_op
= O_constant
;
1987 size_exp
.X_add_number
= size
;
1989 rep_exp
.X_op
= O_multiply
;
1990 rep_exp
.X_add_symbol
= rep_sym
;
1991 rep_exp
.X_op_symbol
= make_expr_symbol (&size_exp
);
1992 rep_exp
.X_add_number
= 0;
1993 rep_sym
= make_expr_symbol (&rep_exp
);
1996 p
= frag_var (rs_space
, (int) size
, (int) size
,
1997 (relax_substateT
) 0, rep_sym
, (offsetT
) 0, (char *) 0);
2000 memset (p
, 0, (unsigned int) size
);
2002 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
2003 flavoured AS. The following bizarre behaviour is to be
2004 compatible with above. I guess they tried to take up to 8
2005 bytes from a 4-byte expression and they forgot to sign
2007 #define BSD_FILL_SIZE_CROCK_4 (4)
2008 md_number_to_chars (p
, (valueT
) fill
,
2009 (size
> BSD_FILL_SIZE_CROCK_4
2010 ? BSD_FILL_SIZE_CROCK_4
2012 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
2013 but emits no error message because it seems a legal thing to do.
2014 It is a degenerate case of .fill but could be emitted by a
2017 demand_empty_rest_of_line ();
2021 s_globl (int ignore ATTRIBUTE_UNUSED
)
2030 stop
= mri_comment_field (&stopc
);
2034 name
= input_line_pointer
;
2035 c
= get_symbol_end ();
2036 symbolP
= symbol_find_or_make (name
);
2037 S_SET_EXTERNAL (symbolP
);
2039 *input_line_pointer
= c
;
2041 c
= *input_line_pointer
;
2044 input_line_pointer
++;
2046 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
2052 demand_empty_rest_of_line ();
2055 mri_comment_end (stop
, stopc
);
2059 #define skip_whitespace(str) do { if (*(str) == ' ') ++(str); } while (0)
2062 skip_past_char (char ** str
, char c
)
2072 #define skip_past_comma(str) skip_past_char (str, ',')
2074 /* Parse an attribute directive for VENDOR.
2075 Returns the attribute number read, or zero on error. */
2077 s_vendor_attribute (int vendor
)
2085 /* Read the first number or name. */
2086 skip_whitespace (input_line_pointer
);
2087 s
= input_line_pointer
;
2088 if (ISDIGIT (*input_line_pointer
))
2091 if (exp
.X_op
!= O_constant
)
2093 tag
= exp
.X_add_number
;
2099 /* A name may contain '_', but no other punctuation. */
2100 for (; ISALNUM (*input_line_pointer
) || *input_line_pointer
== '_';
2101 ++input_line_pointer
)
2106 name
= (char *) alloca (i
+ 1);
2107 memcpy (name
, s
, i
);
2110 #ifndef CONVERT_SYMBOLIC_ATTRIBUTE
2111 #define CONVERT_SYMBOLIC_ATTRIBUTE(a) -1
2114 tag
= CONVERT_SYMBOLIC_ATTRIBUTE (name
);
2117 as_bad (_("Attribute name not recognised: %s"), name
);
2118 ignore_rest_of_line ();
2123 type
= _bfd_elf_obj_attrs_arg_type (stdoutput
, vendor
, tag
);
2125 if (skip_past_comma (&input_line_pointer
) == -1)
2130 if (exp
.X_op
!= O_constant
)
2132 as_bad (_("expected numeric constant"));
2133 ignore_rest_of_line ();
2136 i
= exp
.X_add_number
;
2139 && skip_past_comma (&input_line_pointer
) == -1)
2141 as_bad (_("expected comma"));
2142 ignore_rest_of_line ();
2149 skip_whitespace (input_line_pointer
);
2150 if (*input_line_pointer
!= '"')
2152 s
= demand_copy_C_string (&len
);
2158 bfd_elf_add_obj_attr_int_string (stdoutput
, vendor
, tag
, i
, s
);
2161 bfd_elf_add_obj_attr_string (stdoutput
, vendor
, tag
, s
);
2164 bfd_elf_add_obj_attr_int (stdoutput
, vendor
, tag
, i
);
2170 demand_empty_rest_of_line ();
2173 as_bad (_("bad string constant"));
2174 ignore_rest_of_line ();
2177 as_bad (_("expected <tag> , <value>"));
2178 ignore_rest_of_line ();
2182 /* Parse a .gnu_attribute directive. */
2185 s_gnu_attribute (int ignored ATTRIBUTE_UNUSED
)
2187 s_vendor_attribute (OBJ_ATTR_GNU
);
2189 #endif /* OBJ_ELF */
2191 /* Handle the MRI IRP and IRPC pseudo-ops. */
2202 as_where (&file
, &line
);
2205 eol
= find_end_of_line (input_line_pointer
, 0);
2206 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2207 input_line_pointer
= eol
;
2211 err
= expand_irp (irpc
, 0, &s
, &out
, get_non_macro_line_sb
);
2213 as_bad_where (file
, line
, "%s", err
);
2217 input_scrub_include_sb (&out
, input_line_pointer
, 1);
2219 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2222 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2223 the section to only be linked once. However, this is not supported
2224 by most object file formats. This takes an optional argument,
2225 which is what to do about duplicates. */
2228 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
2230 enum linkonce_type type
;
2234 type
= LINKONCE_DISCARD
;
2236 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
2241 s
= input_line_pointer
;
2242 c
= get_symbol_end ();
2243 if (strcasecmp (s
, "discard") == 0)
2244 type
= LINKONCE_DISCARD
;
2245 else if (strcasecmp (s
, "one_only") == 0)
2246 type
= LINKONCE_ONE_ONLY
;
2247 else if (strcasecmp (s
, "same_size") == 0)
2248 type
= LINKONCE_SAME_SIZE
;
2249 else if (strcasecmp (s
, "same_contents") == 0)
2250 type
= LINKONCE_SAME_CONTENTS
;
2252 as_warn (_("unrecognized .linkonce type `%s'"), s
);
2254 *input_line_pointer
= c
;
2257 #ifdef obj_handle_link_once
2258 obj_handle_link_once (type
);
2259 #else /* ! defined (obj_handle_link_once) */
2263 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
2264 as_warn (_(".linkonce is not supported for this object file format"));
2266 flags
= bfd_get_section_flags (stdoutput
, now_seg
);
2267 flags
|= SEC_LINK_ONCE
;
2272 case LINKONCE_DISCARD
:
2273 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
2275 case LINKONCE_ONE_ONLY
:
2276 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
2278 case LINKONCE_SAME_SIZE
:
2279 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
2281 case LINKONCE_SAME_CONTENTS
:
2282 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
2285 if (!bfd_set_section_flags (stdoutput
, now_seg
, flags
))
2286 as_bad (_("bfd_set_section_flags: %s"),
2287 bfd_errmsg (bfd_get_error ()));
2289 #endif /* ! defined (obj_handle_link_once) */
2291 demand_empty_rest_of_line ();
2295 bss_alloc (symbolS
*symbolP
, addressT size
, int align
)
2298 segT current_seg
= now_seg
;
2299 subsegT current_subseg
= now_subseg
;
2300 segT bss_seg
= bss_section
;
2302 #if defined (TC_MIPS) || defined (TC_ALPHA)
2303 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
2304 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
2306 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2307 if (size
<= bfd_get_gp_size (stdoutput
))
2309 bss_seg
= subseg_new (".sbss", 1);
2310 seg_info (bss_seg
)->bss
= 1;
2311 if (!bfd_set_section_flags (stdoutput
, bss_seg
, SEC_ALLOC
))
2312 as_warn (_("error setting flags for \".sbss\": %s"),
2313 bfd_errmsg (bfd_get_error ()));
2317 subseg_set (bss_seg
, 1);
2321 record_alignment (bss_seg
, align
);
2322 frag_align (align
, 0, 0);
2325 /* Detach from old frag. */
2326 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2327 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2329 symbol_set_frag (symbolP
, frag_now
);
2330 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
, NULL
);
2334 S_SET_SIZE (symbolP
, size
);
2336 S_SET_SEGMENT (symbolP
, bss_seg
);
2339 /* The symbol may already have been created with a preceding
2340 ".globl" directive -- be careful not to step on storage class
2341 in that case. Otherwise, set it to static. */
2342 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2343 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2344 #endif /* OBJ_COFF */
2346 subseg_set (current_seg
, current_subseg
);
2350 parse_align (int align_bytes
)
2356 if (*input_line_pointer
!= ',')
2359 as_bad (_("expected alignment after size"));
2360 ignore_rest_of_line ();
2364 input_line_pointer
++;
2367 align
= get_absolute_expr (&exp
);
2368 if (exp
.X_op
== O_absent
)
2371 if (!exp
.X_unsigned
)
2373 as_warn (_("alignment negative; 0 assumed"));
2377 if (align_bytes
&& align
!= 0)
2379 /* convert to a power of 2 alignment */
2380 unsigned int alignp2
= 0;
2381 while ((align
& 1) == 0)
2382 align
>>= 1, ++alignp2
;
2385 as_bad (_("alignment not a power of 2"));
2386 ignore_rest_of_line ();
2394 /* Called from s_comm_internal after symbol name and size have been
2395 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2396 1 if this was a ".bss" directive which has a 3rd argument
2397 (alignment as a power of 2), or 2 if this was a ".bss" directive
2398 with alignment in bytes. */
2401 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2407 align
= parse_align (needs_align
- 1);
2408 if (align
== (addressT
) -1)
2412 /* Assume some objects may require alignment on some systems. */
2413 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2415 bss_alloc (symbolP
, size
, align
);
2420 s_lcomm (int needs_align
)
2422 s_comm_internal (needs_align
, s_lcomm_internal
);
2426 s_lcomm_bytes (int needs_align
)
2428 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2432 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2440 /* We permit ANY defined expression: BSD4.2 demands constants. */
2441 name
= input_line_pointer
;
2442 c
= get_symbol_end ();
2443 p
= input_line_pointer
;
2448 as_bad (_("expected symbol name"));
2449 ignore_rest_of_line ();
2455 if (*input_line_pointer
!= ',')
2458 as_bad (_("expected comma after \"%s\""), name
);
2460 ignore_rest_of_line ();
2464 input_line_pointer
++;
2465 expression_and_evaluate (&exp
);
2467 if (exp
.X_op
!= O_constant
2468 && exp
.X_op
!= O_register
)
2470 as_bad (_("bad expression"));
2471 ignore_rest_of_line ();
2476 symbolP
= symbol_find_or_make (name
);
2478 if (S_GET_SEGMENT (symbolP
) == undefined_section
)
2480 /* The name might be an undefined .global symbol; be sure to
2481 keep the "external" bit. */
2482 S_SET_SEGMENT (symbolP
,
2483 (exp
.X_op
== O_constant
2486 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2490 as_bad (_("symbol `%s' is already defined"), name
);
2494 demand_empty_rest_of_line ();
2497 /* Read a line into an sb. Returns the character that ended the line
2498 or zero if there are no more lines. */
2501 get_line_sb (sb
*line
, int in_macro
)
2505 if (input_line_pointer
[-1] == '\n')
2506 bump_line_counters ();
2508 if (input_line_pointer
>= buffer_limit
)
2510 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2511 if (buffer_limit
== 0)
2515 eol
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 0, in_macro
);
2516 sb_add_buffer (line
, input_line_pointer
, eol
- input_line_pointer
);
2517 input_line_pointer
= eol
;
2519 /* Don't skip multiple end-of-line characters, because that breaks support
2520 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2521 characters but isn't. Instead just skip one end of line character and
2522 return the character skipped so that the caller can re-insert it if
2524 return *input_line_pointer
++;
2528 get_non_macro_line_sb (sb
*line
)
2530 return get_line_sb (line
, 0);
2534 get_macro_line_sb (sb
*line
)
2536 return get_line_sb (line
, 1);
2539 /* Define a macro. This is an interface to macro.c. */
2542 s_macro (int ignore ATTRIBUTE_UNUSED
)
2550 as_where (&file
, &line
);
2553 eol
= find_end_of_line (input_line_pointer
, 0);
2554 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2555 input_line_pointer
= eol
;
2557 if (line_label
!= NULL
)
2562 sb_add_string (&label
, S_GET_NAME (line_label
));
2563 err
= define_macro (0, &s
, &label
, get_macro_line_sb
, file
, line
, &name
);
2567 err
= define_macro (0, &s
, NULL
, get_macro_line_sb
, file
, line
, &name
);
2569 as_bad_where (file
, line
, err
, name
);
2572 if (line_label
!= NULL
)
2574 S_SET_SEGMENT (line_label
, absolute_section
);
2575 S_SET_VALUE (line_label
, 0);
2576 symbol_set_frag (line_label
, &zero_address_frag
);
2579 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2580 && hash_find (po_hash
, name
) != NULL
)
2583 && hash_find (po_hash
, name
+ 1) != NULL
))
2584 as_warn_where (file
,
2586 _("attempt to redefine pseudo-op `%s' ignored"),
2593 /* Handle the .mexit pseudo-op, which immediately exits a macro
2597 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2601 cond_exit_macro (macro_nest
);
2602 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2605 as_warn (_("ignoring macro exit outside a macro definition."));
2608 /* Switch in and out of MRI mode. */
2611 s_mri (int ignore ATTRIBUTE_UNUSED
)
2614 #ifdef MRI_MODE_CHANGE
2618 on
= get_absolute_expression ();
2619 #ifdef MRI_MODE_CHANGE
2620 old_flag
= flag_mri
;
2639 /* Operator precedence changes in m68k MRI mode, so we need to
2640 update the operator rankings. */
2641 expr_set_precedence ();
2643 #ifdef MRI_MODE_CHANGE
2645 MRI_MODE_CHANGE (on
);
2648 demand_empty_rest_of_line ();
2651 /* Handle changing the location counter. */
2654 do_org (segT segment
, expressionS
*exp
, int fill
)
2656 if (segment
!= now_seg
&& segment
!= absolute_section
)
2657 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2659 if (now_seg
== absolute_section
)
2662 as_warn (_("ignoring fill value in absolute section"));
2663 if (exp
->X_op
!= O_constant
)
2665 as_bad (_("only constant offsets supported in absolute section"));
2666 exp
->X_add_number
= 0;
2668 abs_section_offset
= exp
->X_add_number
;
2673 symbolS
*sym
= exp
->X_add_symbol
;
2674 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2676 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2678 /* Handle complex expressions. */
2679 sym
= make_expr_symbol (exp
);
2683 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2689 s_org (int ignore ATTRIBUTE_UNUSED
)
2695 #ifdef md_flush_pending_output
2696 md_flush_pending_output ();
2699 /* The m68k MRI assembler has a different meaning for .org. It
2700 means to create an absolute section at a given address. We can't
2701 support that--use a linker script instead. */
2704 as_bad (_("MRI style ORG pseudo-op not supported"));
2705 ignore_rest_of_line ();
2709 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2710 thing as a sub-segment-relative origin. Any absolute origin is
2711 given a warning, then assumed to be segment-relative. Any
2712 segmented origin expression ("foo+42") had better be in the right
2713 segment or the .org is ignored.
2715 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2716 we never know sub-segment sizes when we are reading code. BSD
2717 will crash trying to emit negative numbers of filler bytes in
2718 certain .orgs. We don't crash, but see as-write for that code.
2720 Don't make frag if need_pass_2==1. */
2721 segment
= get_known_segmented_expression (&exp
);
2722 if (*input_line_pointer
== ',')
2724 input_line_pointer
++;
2725 temp_fill
= get_absolute_expression ();
2731 do_org (segment
, &exp
, temp_fill
);
2733 demand_empty_rest_of_line ();
2736 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2737 called by the obj-format routine which handles section changing
2738 when in MRI mode. It will create a new section, and return it. It
2739 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2740 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2743 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2753 name
= input_line_pointer
;
2754 if (!ISDIGIT (*name
))
2755 c
= get_symbol_end ();
2760 ++input_line_pointer
;
2762 while (ISDIGIT (*input_line_pointer
));
2764 c
= *input_line_pointer
;
2765 *input_line_pointer
= '\0';
2768 name
= xstrdup (name
);
2770 *input_line_pointer
= c
;
2772 seg
= subseg_new (name
, 0);
2774 if (*input_line_pointer
== ',')
2778 ++input_line_pointer
;
2779 align
= get_absolute_expression ();
2780 record_alignment (seg
, align
);
2784 if (*input_line_pointer
== ',')
2786 c
= *++input_line_pointer
;
2788 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
2791 as_bad (_("unrecognized section type"));
2792 ++input_line_pointer
;
2797 flags
= SEC_NO_FLAGS
;
2799 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
2800 else if (*type
== 'D' || *type
== 'M')
2801 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
2802 else if (*type
== 'R')
2803 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
2804 if (flags
!= SEC_NO_FLAGS
)
2806 if (!bfd_set_section_flags (stdoutput
, seg
, flags
))
2807 as_warn (_("error setting flags for \"%s\": %s"),
2808 bfd_section_name (stdoutput
, seg
),
2809 bfd_errmsg (bfd_get_error ()));
2814 /* Ignore the HP type. */
2815 if (*input_line_pointer
== ',')
2816 input_line_pointer
+= 2;
2818 demand_empty_rest_of_line ();
2820 #else /* ! TC_M68K */
2829 name
= input_line_pointer
;
2830 c
= get_symbol_end ();
2832 name
= xstrdup (name
);
2834 *input_line_pointer
= c
;
2836 seg
= subseg_new (name
, 0);
2838 if (*input_line_pointer
!= ',')
2844 ++input_line_pointer
;
2846 sectype
= input_line_pointer
;
2847 c
= get_symbol_end ();
2848 if (*sectype
== '\0')
2850 else if (strcasecmp (sectype
, "text") == 0)
2852 else if (strcasecmp (sectype
, "data") == 0)
2854 else if (strcasecmp (sectype
, "romdata") == 0)
2857 as_warn (_("unrecognized section type `%s'"), sectype
);
2858 *input_line_pointer
= c
;
2861 if (*input_line_pointer
== ',')
2865 ++input_line_pointer
;
2867 seccmd
= input_line_pointer
;
2868 c
= get_symbol_end ();
2869 if (strcasecmp (seccmd
, "absolute") == 0)
2871 as_bad (_("absolute sections are not supported"));
2872 *input_line_pointer
= c
;
2873 ignore_rest_of_line ();
2876 else if (strcasecmp (seccmd
, "align") == 0)
2880 *input_line_pointer
= c
;
2881 align
= get_absolute_expression ();
2882 record_alignment (seg
, align
);
2886 as_warn (_("unrecognized section command `%s'"), seccmd
);
2887 *input_line_pointer
= c
;
2891 demand_empty_rest_of_line ();
2893 #else /* ! TC_I960 */
2894 /* The MRI assembler seems to use different forms of .sect for
2895 different targets. */
2896 as_bad ("MRI mode not supported for this target");
2897 ignore_rest_of_line ();
2898 #endif /* ! TC_I960 */
2899 #endif /* ! TC_M68K */
2902 /* Handle the .print pseudo-op. */
2905 s_print (int ignore ATTRIBUTE_UNUSED
)
2910 s
= demand_copy_C_string (&len
);
2913 demand_empty_rest_of_line ();
2916 /* Handle the .purgem pseudo-op. */
2919 s_purgem (int ignore ATTRIBUTE_UNUSED
)
2921 if (is_it_end_of_statement ())
2923 demand_empty_rest_of_line ();
2933 name
= input_line_pointer
;
2934 c
= get_symbol_end ();
2935 delete_macro (name
);
2936 *input_line_pointer
= c
;
2939 while (*input_line_pointer
++ == ',');
2941 --input_line_pointer
;
2942 demand_empty_rest_of_line ();
2945 /* Handle the .endm/.endr pseudo-ops. */
2948 s_bad_end (int endr
)
2950 as_warn (_(".end%c encountered without preceeding %s"),
2952 endr
? ".rept, .irp, or .irpc" : ".macro");
2953 demand_empty_rest_of_line ();
2956 /* Handle the .rept pseudo-op. */
2959 s_rept (int ignore ATTRIBUTE_UNUSED
)
2963 count
= get_absolute_expression ();
2965 do_repeat (count
, "REPT", "ENDR");
2968 /* This function provides a generic repeat block implementation. It allows
2969 different directives to be used as the start/end keys. */
2972 do_repeat (int count
, const char *start
, const char *end
)
2978 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
2980 as_bad (_("%s without %s"), start
, end
);
2986 sb_add_sb (&many
, &one
);
2990 input_scrub_include_sb (&many
, input_line_pointer
, 1);
2992 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2995 /* Like do_repeat except that any text matching EXPANDER in the
2996 block is replaced by the itteration count. */
2999 do_repeat_with_expander (int count
,
3002 const char * expander
)
3008 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
3010 as_bad (_("%s without %s"), start
, end
);
3016 if (expander
!= NULL
&& strstr (one
.ptr
, expander
) != NULL
)
3018 while (count
-- > 0)
3024 sb_new (& processed
);
3025 sb_add_sb (& processed
, & one
);
3026 sub
= strstr (processed
.ptr
, expander
);
3027 len
= sprintf (sub
, "%d", count
);
3028 gas_assert (len
< 8);
3029 strcpy (sub
+ len
, sub
+ 8);
3030 processed
.len
-= (8 - len
);
3031 sb_add_sb (& many
, & processed
);
3032 sb_kill (& processed
);
3037 sb_add_sb (&many
, &one
);
3041 input_scrub_include_sb (&many
, input_line_pointer
, 1);
3043 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3046 /* Skip to end of current repeat loop; EXTRA indicates how many additional
3047 input buffers to skip. Assumes that conditionals preceding the loop end
3048 are properly nested.
3050 This function makes it easier to implement a premature "break" out of the
3051 loop. The EXTRA arg accounts for other buffers we might have inserted,
3052 such as line substitutions. */
3055 end_repeat (int extra
)
3057 cond_exit_macro (macro_nest
);
3058 while (extra
-- >= 0)
3059 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3063 assign_symbol (char *name
, int mode
)
3067 if (name
[0] == '.' && name
[1] == '\0')
3069 /* Turn '. = mumble' into a .org mumble. */
3073 segment
= get_known_segmented_expression (&exp
);
3076 do_org (segment
, &exp
, 0);
3081 if ((symbolP
= symbol_find (name
)) == NULL
3082 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
3084 symbolP
= symbol_find_or_make (name
);
3086 /* When doing symbol listings, play games with dummy fragments living
3087 outside the normal fragment chain to record the file and line info
3089 if (listing
& LISTING_SYMBOLS
)
3091 extern struct list_info_struct
*listing_tail
;
3092 fragS
*dummy_frag
= (fragS
*) xcalloc (1, sizeof (fragS
));
3093 dummy_frag
->line
= listing_tail
;
3094 dummy_frag
->fr_symbol
= symbolP
;
3095 symbol_set_frag (symbolP
, dummy_frag
);
3099 /* "set" symbols are local unless otherwise specified. */
3100 SF_SET_LOCAL (symbolP
);
3104 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3106 /* Permit register names to be redefined. */
3107 if ((mode
!= 0 || !S_IS_VOLATILE (symbolP
))
3108 && S_GET_SEGMENT (symbolP
) != reg_section
)
3110 as_bad (_("symbol `%s' is already defined"), name
);
3111 symbolP
= symbol_clone (symbolP
, 0);
3113 /* If the symbol is volatile, copy the symbol and replace the
3114 original with the copy, so that previous uses of the symbol will
3115 retain the value of the symbol at the point of use. */
3116 else if (S_IS_VOLATILE (symbolP
))
3117 symbolP
= symbol_clone (symbolP
, 1);
3121 S_SET_VOLATILE (symbolP
);
3123 S_SET_FORWARD_REF (symbolP
);
3125 pseudo_set (symbolP
);
3128 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3129 then this is .equiv, and it is an error if the symbol is already
3130 defined. If EQUIV is -1, the symbol additionally is a forward
3140 /* Especial apologies for the random logic:
3141 this just grew, and could be parsed much more simply!
3143 name
= input_line_pointer
;
3144 delim
= get_symbol_end ();
3145 end_name
= input_line_pointer
;
3148 if (name
== end_name
)
3150 as_bad (_("expected symbol name"));
3151 ignore_rest_of_line ();
3157 if (*input_line_pointer
!= ',')
3160 as_bad (_("expected comma after \"%s\""), name
);
3162 ignore_rest_of_line ();
3166 input_line_pointer
++;
3169 assign_symbol (name
, equiv
);
3172 demand_empty_rest_of_line ();
3185 #ifdef md_flush_pending_output
3186 md_flush_pending_output ();
3189 #ifdef md_cons_align
3194 stop
= mri_comment_field (&stopc
);
3196 /* In m68k MRI mode, we need to align to a word boundary, unless
3198 if (flag_m68k_mri
&& mult
> 1)
3200 if (now_seg
== absolute_section
)
3202 abs_section_offset
+= abs_section_offset
& 1;
3203 if (line_label
!= NULL
)
3204 S_SET_VALUE (line_label
, abs_section_offset
);
3206 else if (mri_common_symbol
!= NULL
)
3210 mri_val
= S_GET_VALUE (mri_common_symbol
);
3211 if ((mri_val
& 1) != 0)
3213 S_SET_VALUE (mri_common_symbol
, mri_val
+ 1);
3214 if (line_label
!= NULL
)
3216 expressionS
*symexp
;
3218 symexp
= symbol_get_value_expression (line_label
);
3219 know (symexp
->X_op
== O_symbol
);
3220 know (symexp
->X_add_symbol
== mri_common_symbol
);
3221 symexp
->X_add_number
+= 1;
3227 do_align (1, (char *) NULL
, 0, 0);
3228 if (line_label
!= NULL
)
3230 symbol_set_frag (line_label
, frag_now
);
3231 S_SET_VALUE (line_label
, frag_now_fix ());
3241 if (*input_line_pointer
== ',')
3243 ++input_line_pointer
;
3248 val
.X_op
= O_constant
;
3249 val
.X_add_number
= 0;
3252 if (val
.X_op
!= O_constant
3253 || val
.X_add_number
< - 0x80
3254 || val
.X_add_number
> 0xff
3255 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
3257 resolve_expression (&exp
);
3258 if (exp
.X_op
!= O_constant
)
3259 as_bad (_("unsupported variable size or fill value"));
3266 bytes
= mult
* exp
.X_add_number
;
3267 for (i
= 0; i
< exp
.X_add_number
; i
++)
3268 emit_expr (&val
, mult
);
3273 if (now_seg
== absolute_section
|| mri_common_symbol
!= NULL
)
3274 resolve_expression (&exp
);
3276 if (exp
.X_op
== O_constant
)
3280 repeat
= exp
.X_add_number
;
3287 as_warn (_(".space repeat count is zero, ignored"));
3288 else if (repeat
< 0)
3289 as_warn (_(".space repeat count is negative, ignored"));
3293 /* If we are in the absolute section, just bump the offset. */
3294 if (now_seg
== absolute_section
)
3296 abs_section_offset
+= repeat
;
3300 /* If we are secretly in an MRI common section, then
3301 creating space just increases the size of the common
3303 if (mri_common_symbol
!= NULL
)
3305 S_SET_VALUE (mri_common_symbol
,
3306 S_GET_VALUE (mri_common_symbol
) + repeat
);
3311 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
3312 (offsetT
) repeat
, (char *) 0);
3316 if (now_seg
== absolute_section
)
3318 as_bad (_("space allocation too complex in absolute section"));
3319 subseg_set (text_section
, 0);
3322 if (mri_common_symbol
!= NULL
)
3324 as_bad (_("space allocation too complex in common section"));
3325 mri_common_symbol
= NULL
;
3329 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
3330 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
3334 *p
= val
.X_add_number
;
3339 /* In MRI mode, after an odd number of bytes, we must align to an
3340 even word boundary, unless the next instruction is a dc.b, ds.b
3342 if (flag_mri
&& (bytes
& 1) != 0)
3343 mri_pending_align
= 1;
3345 demand_empty_rest_of_line ();
3348 mri_comment_end (stop
, stopc
);
3351 /* This is like s_space, but the value is a floating point number with
3352 the given precision. This is for the MRI dcb.s pseudo-op and
3356 s_float_space (int float_type
)
3360 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
3364 #ifdef md_cons_align
3369 stop
= mri_comment_field (&stopc
);
3371 count
= get_absolute_expression ();
3374 if (*input_line_pointer
!= ',')
3376 as_bad (_("missing value"));
3377 ignore_rest_of_line ();
3379 mri_comment_end (stop
, stopc
);
3383 ++input_line_pointer
;
3387 /* Skip any 0{letter} that may be present. Don't even check if the
3388 * letter is legal. */
3389 if (input_line_pointer
[0] == '0'
3390 && ISALPHA (input_line_pointer
[1]))
3391 input_line_pointer
+= 2;
3393 /* Accept :xxxx, where the x's are hex digits, for a floating point
3394 with the exact digits specified. */
3395 if (input_line_pointer
[0] == ':')
3397 flen
= hex_float (float_type
, temp
);
3400 ignore_rest_of_line ();
3402 mri_comment_end (stop
, stopc
);
3410 err
= md_atof (float_type
, temp
, &flen
);
3411 know (flen
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3412 know (err
!= NULL
|| flen
> 0);
3415 as_bad (_("bad floating literal: %s"), err
);
3416 ignore_rest_of_line ();
3418 mri_comment_end (stop
, stopc
);
3423 while (--count
>= 0)
3427 p
= frag_more (flen
);
3428 memcpy (p
, temp
, (unsigned int) flen
);
3431 demand_empty_rest_of_line ();
3434 mri_comment_end (stop
, stopc
);
3437 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3440 s_struct (int ignore ATTRIBUTE_UNUSED
)
3446 stop
= mri_comment_field (&stopc
);
3447 abs_section_offset
= get_absolute_expression ();
3448 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3449 /* The ELF backend needs to know that we are changing sections, so
3450 that .previous works correctly. */
3452 obj_elf_section_change_hook ();
3454 subseg_set (absolute_section
, 0);
3455 demand_empty_rest_of_line ();
3457 mri_comment_end (stop
, stopc
);
3461 s_text (int ignore ATTRIBUTE_UNUSED
)
3465 temp
= get_absolute_expression ();
3466 subseg_set (text_section
, (subsegT
) temp
);
3467 demand_empty_rest_of_line ();
3469 const_flag
&= ~IN_DEFAULT_SECTION
;
3473 /* .weakref x, y sets x as an alias to y that, as long as y is not
3474 referenced directly, will cause y to become a weak symbol. */
3476 s_weakref (int ignore ATTRIBUTE_UNUSED
)
3485 name
= input_line_pointer
;
3486 delim
= get_symbol_end ();
3487 end_name
= input_line_pointer
;
3489 if (name
== end_name
)
3491 as_bad (_("expected symbol name"));
3493 ignore_rest_of_line ();
3497 symbolP
= symbol_find_or_make (name
);
3499 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3501 if (!S_IS_VOLATILE (symbolP
))
3503 as_bad (_("symbol `%s' is already defined"), name
);
3505 ignore_rest_of_line ();
3508 symbolP
= symbol_clone (symbolP
, 1);
3509 S_CLEAR_VOLATILE (symbolP
);
3516 if (*input_line_pointer
!= ',')
3519 as_bad (_("expected comma after \"%s\""), name
);
3521 ignore_rest_of_line ();
3525 input_line_pointer
++;
3529 name
= input_line_pointer
;
3530 delim
= get_symbol_end ();
3531 end_name
= input_line_pointer
;
3533 if (name
== end_name
)
3535 as_bad (_("expected symbol name"));
3536 ignore_rest_of_line ();
3540 if ((symbolP2
= symbol_find_noref (name
, 1)) == NULL
3541 && (symbolP2
= md_undefined_symbol (name
)) == NULL
)
3543 symbolP2
= symbol_find_or_make (name
);
3544 S_SET_WEAKREFD (symbolP2
);
3548 symbolS
*symp
= symbolP2
;
3550 while (S_IS_WEAKREFR (symp
) && symp
!= symbolP
)
3552 expressionS
*expP
= symbol_get_value_expression (symp
);
3554 gas_assert (expP
->X_op
== O_symbol
3555 && expP
->X_add_number
== 0);
3556 symp
= expP
->X_add_symbol
;
3558 if (symp
== symbolP
)
3562 loop
= concat (S_GET_NAME (symbolP
),
3563 " => ", S_GET_NAME (symbolP2
), (const char *) NULL
);
3566 while (symp
!= symbolP
)
3568 char *old_loop
= loop
;
3569 symp
= symbol_get_value_expression (symp
)->X_add_symbol
;
3570 loop
= concat (loop
, " => ", S_GET_NAME (symp
),
3571 (const char *) NULL
);
3575 as_bad (_("%s: would close weakref loop: %s"),
3576 S_GET_NAME (symbolP
), loop
);
3581 ignore_rest_of_line ();
3585 /* Short-circuiting instead of just checking here might speed
3586 things up a tiny little bit, but loop error messages would
3587 miss intermediate links. */
3588 /* symbolP2 = symp; */
3593 memset (&exp
, 0, sizeof (exp
));
3594 exp
.X_op
= O_symbol
;
3595 exp
.X_add_symbol
= symbolP2
;
3597 S_SET_SEGMENT (symbolP
, undefined_section
);
3598 symbol_set_value_expression (symbolP
, &exp
);
3599 symbol_set_frag (symbolP
, &zero_address_frag
);
3600 S_SET_WEAKREFR (symbolP
);
3602 demand_empty_rest_of_line ();
3606 /* Verify that we are at the end of a line. If not, issue an error and
3610 demand_empty_rest_of_line (void)
3613 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3614 input_line_pointer
++;
3617 if (ISPRINT (*input_line_pointer
))
3618 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3619 *input_line_pointer
);
3621 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3622 *input_line_pointer
);
3623 ignore_rest_of_line ();
3626 /* Return pointing just after end-of-line. */
3627 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3630 /* Silently advance to the end of line. Use this after already having
3631 issued an error about something bad. */
3634 ignore_rest_of_line (void)
3636 while (input_line_pointer
< buffer_limit
3637 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3638 input_line_pointer
++;
3640 input_line_pointer
++;
3642 /* Return pointing just after end-of-line. */
3643 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3646 /* Sets frag for given symbol to zero_address_frag, except when the
3647 symbol frag is already set to a dummy listing frag. */
3650 set_zero_frag (symbolS
*symbolP
)
3652 if (symbol_get_frag (symbolP
)->fr_type
!= rs_dummy
)
3653 symbol_set_frag (symbolP
, &zero_address_frag
);
3656 /* In: Pointer to a symbol.
3657 Input_line_pointer->expression.
3659 Out: Input_line_pointer->just after any whitespace after expression.
3660 Tried to set symbol to value of expression.
3661 Will change symbols type, value, and frag; */
3664 pseudo_set (symbolS
*symbolP
)
3669 know (symbolP
); /* NULL pointer is logic error. */
3671 if (!S_IS_FORWARD_REF (symbolP
))
3672 (void) expression (&exp
);
3674 (void) deferred_expression (&exp
);
3676 if (exp
.X_op
== O_illegal
)
3677 as_bad (_("illegal expression"));
3678 else if (exp
.X_op
== O_absent
)
3679 as_bad (_("missing expression"));
3680 else if (exp
.X_op
== O_big
)
3682 if (exp
.X_add_number
> 0)
3683 as_bad (_("bignum invalid"));
3685 as_bad (_("floating point number invalid"));
3687 else if (exp
.X_op
== O_subtract
3688 && !S_IS_FORWARD_REF (symbolP
)
3689 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
3690 && (symbol_get_frag (exp
.X_add_symbol
)
3691 == symbol_get_frag (exp
.X_op_symbol
)))
3693 exp
.X_op
= O_constant
;
3694 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
3695 - S_GET_VALUE (exp
.X_op_symbol
));
3698 if (symbol_section_p (symbolP
))
3700 as_bad ("attempt to set value of section symbol");
3709 exp
.X_add_number
= 0;
3712 S_SET_SEGMENT (symbolP
, absolute_section
);
3713 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3714 set_zero_frag (symbolP
);
3718 #ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
3719 if (S_IS_EXTERNAL (symbolP
))
3721 as_bad ("can't equate global symbol `%s' with register name",
3722 S_GET_NAME (symbolP
));
3726 S_SET_SEGMENT (symbolP
, reg_section
);
3727 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3728 set_zero_frag (symbolP
);
3729 symbol_get_value_expression (symbolP
)->X_op
= O_register
;
3733 seg
= S_GET_SEGMENT (exp
.X_add_symbol
);
3734 /* For x=undef+const, create an expression symbol.
3735 For x=x+const, just update x except when x is an undefined symbol
3736 For x=defined+const, evaluate x. */
3737 if (symbolP
== exp
.X_add_symbol
3738 && (seg
!= undefined_section
3739 || !symbol_constant_p (symbolP
)))
3741 *symbol_X_add_number (symbolP
) += exp
.X_add_number
;
3744 else if (!S_IS_FORWARD_REF (symbolP
) && seg
!= undefined_section
)
3746 symbolS
*s
= exp
.X_add_symbol
;
3748 if (S_IS_COMMON (s
))
3749 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3750 S_GET_NAME (symbolP
), S_GET_NAME (s
));
3752 S_SET_SEGMENT (symbolP
, seg
);
3753 S_SET_VALUE (symbolP
, exp
.X_add_number
+ S_GET_VALUE (s
));
3754 symbol_set_frag (symbolP
, symbol_get_frag (s
));
3755 copy_symbol_attributes (symbolP
, s
);
3758 S_SET_SEGMENT (symbolP
, undefined_section
);
3759 symbol_set_value_expression (symbolP
, &exp
);
3760 copy_symbol_attributes (symbolP
, exp
.X_add_symbol
);
3761 set_zero_frag (symbolP
);
3765 /* The value is some complex expression. */
3766 S_SET_SEGMENT (symbolP
, expr_section
);
3767 symbol_set_value_expression (symbolP
, &exp
);
3768 set_zero_frag (symbolP
);
3775 CONStruct more frag of .bytes, or .words etc.
3776 Should need_pass_2 be 1 then emit no frag(s).
3777 This understands EXPRESSIONS.
3781 This has a split personality. We use expression() to read the
3782 value. We can detect if the value won't fit in a byte or word.
3783 But we can't detect if expression() discarded significant digits
3784 in the case of a long. Not worth the crocks required to fix it. */
3786 /* Select a parser for cons expressions. */
3788 /* Some targets need to parse the expression in various fancy ways.
3789 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3790 (for example, the HPPA does this). Otherwise, you can define
3791 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3792 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3793 are defined, which is the normal case, then only simple expressions
3798 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
3801 #ifndef TC_PARSE_CONS_EXPRESSION
3802 #ifdef BITFIELD_CONS_EXPRESSIONS
3803 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3805 parse_bitfield_cons (expressionS
*exp
, unsigned int nbytes
);
3807 #ifdef REPEAT_CONS_EXPRESSIONS
3808 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3810 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
3813 /* If we haven't gotten one yet, just call expression. */
3814 #ifndef TC_PARSE_CONS_EXPRESSION
3815 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3820 do_parse_cons_expression (expressionS
*exp
,
3821 int nbytes ATTRIBUTE_UNUSED
)
3823 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3827 /* Worker to do .byte etc statements.
3828 Clobbers input_line_pointer and checks end-of-line. */
3831 cons_worker (int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
3839 #ifdef md_flush_pending_output
3840 md_flush_pending_output ();
3844 stop
= mri_comment_field (&stopc
);
3846 if (is_it_end_of_statement ())
3848 demand_empty_rest_of_line ();
3850 mri_comment_end (stop
, stopc
);
3854 #ifdef TC_ADDRESS_BYTES
3856 nbytes
= TC_ADDRESS_BYTES ();
3859 #ifdef md_cons_align
3860 md_cons_align (nbytes
);
3868 parse_mri_cons (&exp
, (unsigned int) nbytes
);
3872 if (*input_line_pointer
== '"')
3874 as_bad (_("unexpected `\"' in expression"));
3875 ignore_rest_of_line ();
3878 TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
3883 if (exp
.X_op
== O_symbol
)
3884 exp
.X_op
= O_symbol_rva
;
3886 as_fatal (_("rva without symbol"));
3888 emit_expr (&exp
, (unsigned int) nbytes
);
3891 while (*input_line_pointer
++ == ',');
3893 /* In MRI mode, after an odd number of bytes, we must align to an
3894 even word boundary, unless the next instruction is a dc.b, ds.b
3896 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
3897 mri_pending_align
= 1;
3899 input_line_pointer
--; /* Put terminator back into stream. */
3901 demand_empty_rest_of_line ();
3904 mri_comment_end (stop
, stopc
);
3910 cons_worker (size
, 0);
3916 cons_worker (size
, 1);
3919 /* .reloc offset, reloc_name, symbol+addend. */
3922 s_reloc (int ignore ATTRIBUTE_UNUSED
)
3929 struct reloc_list
*reloc
;
3931 reloc
= (struct reloc_list
*) xmalloc (sizeof (*reloc
));
3934 stop
= mri_comment_field (&stopc
);
3943 as_bad (_("missing or bad offset expression"));
3946 exp
.X_add_symbol
= section_symbol (now_seg
);
3947 exp
.X_op
= O_symbol
;
3950 if (exp
.X_add_number
== 0)
3952 reloc
->u
.a
.offset_sym
= exp
.X_add_symbol
;
3957 reloc
->u
.a
.offset_sym
= make_expr_symbol (&exp
);
3962 if (*input_line_pointer
!= ',')
3964 as_bad (_("missing reloc type"));
3968 ++input_line_pointer
;
3970 r_name
= input_line_pointer
;
3971 c
= get_symbol_end ();
3972 reloc
->u
.a
.howto
= bfd_reloc_name_lookup (stdoutput
, r_name
);
3973 *input_line_pointer
= c
;
3974 if (reloc
->u
.a
.howto
== NULL
)
3976 as_bad (_("unrecognized reloc type"));
3980 exp
.X_op
= O_absent
;
3982 if (*input_line_pointer
== ',')
3984 ++input_line_pointer
;
3992 as_bad (_("bad reloc expression"));
3994 ignore_rest_of_line ();
3997 mri_comment_end (stop
, stopc
);
4000 reloc
->u
.a
.sym
= NULL
;
4001 reloc
->u
.a
.addend
= 0;
4004 reloc
->u
.a
.sym
= NULL
;
4005 reloc
->u
.a
.addend
= exp
.X_add_number
;
4008 reloc
->u
.a
.sym
= exp
.X_add_symbol
;
4009 reloc
->u
.a
.addend
= exp
.X_add_number
;
4012 reloc
->u
.a
.sym
= make_expr_symbol (&exp
);
4013 reloc
->u
.a
.addend
= 0;
4017 as_where (&reloc
->file
, &reloc
->line
);
4018 reloc
->next
= reloc_list
;
4021 demand_empty_rest_of_line ();
4023 mri_comment_end (stop
, stopc
);
4026 /* Put the contents of expression EXP into the object file using
4027 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
4030 emit_expr (expressionS
*exp
, unsigned int nbytes
)
4034 valueT extra_digit
= 0;
4036 /* Don't do anything if we are going to make another pass. */
4040 /* Grow the current frag now so that dot_value does not get invalidated
4041 if the frag were to fill up in the frag_more() call below. */
4043 dot_value
= frag_now_fix ();
4047 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
4048 appear as a four byte positive constant in the .line section,
4049 followed by a 2 byte 0xffff. Look for that case here. */
4051 static int dwarf_line
= -1;
4053 if (strcmp (segment_name (now_seg
), ".line") != 0)
4055 else if (dwarf_line
>= 0
4057 && exp
->X_op
== O_constant
4058 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
4059 listing_source_line ((unsigned int) dwarf_line
);
4060 else if (nbytes
== 4
4061 && exp
->X_op
== O_constant
4062 && exp
->X_add_number
>= 0)
4063 dwarf_line
= exp
->X_add_number
;
4068 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
4069 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
4070 AT_sibling (0x12) followed by a four byte address of the sibling
4071 followed by a 2 byte AT_name (0x38) followed by the name of the
4072 file. We look for that case here. */
4074 static int dwarf_file
= 0;
4076 if (strcmp (segment_name (now_seg
), ".debug") != 0)
4078 else if (dwarf_file
== 0
4080 && exp
->X_op
== O_constant
4081 && exp
->X_add_number
== 0x11)
4083 else if (dwarf_file
== 1
4085 && exp
->X_op
== O_constant
4086 && exp
->X_add_number
== 0x12)
4088 else if (dwarf_file
== 2
4091 else if (dwarf_file
== 3
4093 && exp
->X_op
== O_constant
4094 && exp
->X_add_number
== 0x38)
4099 /* The variable dwarf_file_string tells stringer that the string
4100 may be the name of the source file. */
4101 if (dwarf_file
== 4)
4102 dwarf_file_string
= 1;
4104 dwarf_file_string
= 0;
4109 if (check_eh_frame (exp
, &nbytes
))
4114 /* Allow `.word 0' in the absolute section. */
4115 if (now_seg
== absolute_section
)
4117 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
4118 as_bad (_("attempt to store value in absolute section"));
4119 abs_section_offset
+= nbytes
;
4123 /* Handle a negative bignum. */
4125 && exp
->X_add_number
== 0
4126 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
4127 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
4130 unsigned long carry
;
4132 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
4134 /* Negate the bignum: one's complement each digit and add 1. */
4136 for (i
= 0; i
< exp
->X_add_number
; i
++)
4140 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
4143 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
4144 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
4147 /* We can ignore any carry out, because it will be handled by
4148 extra_digit if it is needed. */
4150 extra_digit
= (valueT
) -1;
4154 if (op
== O_absent
|| op
== O_illegal
)
4156 as_warn (_("zero assumed for missing expression"));
4157 exp
->X_add_number
= 0;
4160 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4162 as_bad (_("floating point number invalid"));
4163 exp
->X_add_number
= 0;
4166 else if (op
== O_register
)
4168 as_warn (_("register value used as expression"));
4172 p
= frag_more ((int) nbytes
);
4174 #ifndef WORKING_DOT_WORD
4175 /* If we have the difference of two symbols in a word, save it on
4176 the broken_words list. See the code in write.c. */
4177 if (op
== O_subtract
&& nbytes
== 2)
4179 struct broken_word
*x
;
4181 x
= (struct broken_word
*) xmalloc (sizeof (struct broken_word
));
4182 x
->next_broken_word
= broken_words
;
4185 x
->subseg
= now_subseg
;
4187 x
->word_goes_here
= p
;
4189 x
->add
= exp
->X_add_symbol
;
4190 x
->sub
= exp
->X_op_symbol
;
4191 x
->addnum
= exp
->X_add_number
;
4199 /* If we have an integer, but the number of bytes is too large to
4200 pass to md_number_to_chars, handle it as a bignum. */
4201 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
4203 extra_digit
= exp
->X_unsigned
? 0 : -1;
4204 convert_to_bignum (exp
);
4208 if (op
== O_constant
)
4216 /* JF << of >= number of bits in the object is undefined. In
4217 particular SPARC (Sun 4) has problems. */
4218 if (nbytes
>= sizeof (valueT
))
4221 if (nbytes
> sizeof (valueT
))
4224 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
4228 /* Don't store these bits. */
4229 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
4230 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
4233 unmask
= ~mask
; /* Do store these bits. */
4236 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
4237 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
4240 get
= exp
->X_add_number
;
4242 if ((get
& mask
) != 0
4243 && ((get
& mask
) != mask
4244 || (get
& hibit
) == 0))
4245 { /* Leading bits contain both 0s & 1s. */
4246 #if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG
4248 as_warn (_("value 0x%llx truncated to 0x%llx"),
4249 (unsigned long long) get
, (unsigned long long) use
);
4251 as_warn (_("value 0x%I64x truncated to 0x%I64x"),
4252 (unsigned long long) get
, (unsigned long long) use
);
4255 as_warn (_("value 0x%lx truncated to 0x%lx"),
4256 (unsigned long) get
, (unsigned long) use
);
4259 /* Put bytes in right order. */
4260 md_number_to_chars (p
, use
, (int) nbytes
);
4262 else if (op
== O_big
)
4265 LITTLENUM_TYPE
*nums
;
4267 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
4270 int i
= nbytes
/ CHARS_PER_LITTLENUM
;
4273 LITTLENUM_TYPE sign
= 0;
4274 if ((generic_bignum
[--i
]
4275 & (1 << (LITTLENUM_NUMBER_OF_BITS
- 1))) != 0)
4276 sign
= ~(LITTLENUM_TYPE
) 0;
4277 while (++i
< exp
->X_add_number
)
4278 if (generic_bignum
[i
] != sign
)
4281 if (i
< exp
->X_add_number
)
4282 as_warn (_("bignum truncated to %d bytes"), nbytes
);
4288 md_number_to_chars (p
, (valueT
) generic_bignum
[0], 1);
4291 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
4293 if (target_big_endian
)
4295 while (nbytes
> size
)
4297 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4298 nbytes
-= CHARS_PER_LITTLENUM
;
4299 p
+= CHARS_PER_LITTLENUM
;
4302 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
4303 while (size
>= CHARS_PER_LITTLENUM
)
4306 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4307 size
-= CHARS_PER_LITTLENUM
;
4308 p
+= CHARS_PER_LITTLENUM
;
4313 nums
= generic_bignum
;
4314 while (size
>= CHARS_PER_LITTLENUM
)
4316 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4318 size
-= CHARS_PER_LITTLENUM
;
4319 p
+= CHARS_PER_LITTLENUM
;
4320 nbytes
-= CHARS_PER_LITTLENUM
;
4323 while (nbytes
>= CHARS_PER_LITTLENUM
)
4325 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4326 nbytes
-= CHARS_PER_LITTLENUM
;
4327 p
+= CHARS_PER_LITTLENUM
;
4332 emit_expr_fix (exp
, nbytes
, frag_now
, p
);
4336 emit_expr_fix (expressionS
*exp
, unsigned int nbytes
, fragS
*frag
, char *p
)
4338 memset (p
, 0, nbytes
);
4340 /* Generate a fixS to record the symbol value. */
4342 #ifdef TC_CONS_FIX_NEW
4343 TC_CONS_FIX_NEW (frag
, p
- frag
->fr_literal
, nbytes
, exp
);
4346 bfd_reloc_code_real_type r
;
4366 as_bad (_("unsupported BFD relocation size %u"), nbytes
);
4370 fix_new_exp (frag
, p
- frag
->fr_literal
, (int) nbytes
, exp
,
4376 #ifdef BITFIELD_CONS_EXPRESSIONS
4378 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
4379 w:x,y:z, where w and y are bitwidths and x and y are values. They
4380 then pack them all together. We do a little better in that we allow
4381 them in words, longs, etc. and we'll pack them in target byte order
4384 The rules are: pack least significant bit first, if a field doesn't
4385 entirely fit, put it in the next unit. Overflowing the bitfield is
4386 explicitly *not* even a warning. The bitwidth should be considered
4389 To use this function the tc-XXX.h file should define
4390 BITFIELD_CONS_EXPRESSIONS. */
4393 parse_bitfield_cons (exp
, nbytes
)
4395 unsigned int nbytes
;
4397 unsigned int bits_available
= BITS_PER_CHAR
* nbytes
;
4398 char *hold
= input_line_pointer
;
4400 (void) expression (exp
);
4402 if (*input_line_pointer
== ':')
4409 unsigned long width
;
4411 if (*input_line_pointer
!= ':')
4413 input_line_pointer
= hold
;
4415 } /* Next piece is not a bitfield. */
4417 /* In the general case, we can't allow
4418 full expressions with symbol
4419 differences and such. The relocation
4420 entries for symbols not defined in this
4421 assembly would require arbitrary field
4422 widths, positions, and masks which most
4423 of our current object formats don't
4426 In the specific case where a symbol
4427 *is* defined in this assembly, we
4428 *could* build fixups and track it, but
4429 this could lead to confusion for the
4430 backends. I'm lazy. I'll take any
4431 SEG_ABSOLUTE. I think that means that
4432 you can use a previous .set or
4433 .equ type symbol. xoxorich. */
4435 if (exp
->X_op
== O_absent
)
4437 as_warn (_("using a bit field width of zero"));
4438 exp
->X_add_number
= 0;
4439 exp
->X_op
= O_constant
;
4440 } /* Implied zero width bitfield. */
4442 if (exp
->X_op
!= O_constant
)
4444 *input_line_pointer
= '\0';
4445 as_bad (_("field width \"%s\" too complex for a bitfield"), hold
);
4446 *input_line_pointer
= ':';
4447 demand_empty_rest_of_line ();
4449 } /* Too complex. */
4451 if ((width
= exp
->X_add_number
) > (BITS_PER_CHAR
* nbytes
))
4453 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4454 width
, nbytes
, (BITS_PER_CHAR
* nbytes
));
4455 width
= BITS_PER_CHAR
* nbytes
;
4458 if (width
> bits_available
)
4460 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4461 input_line_pointer
= hold
;
4462 exp
->X_add_number
= value
;
4467 hold
= ++input_line_pointer
;
4469 (void) expression (exp
);
4470 if (exp
->X_op
!= O_constant
)
4472 char cache
= *input_line_pointer
;
4474 *input_line_pointer
= '\0';
4475 as_bad (_("field value \"%s\" too complex for a bitfield"), hold
);
4476 *input_line_pointer
= cache
;
4477 demand_empty_rest_of_line ();
4479 } /* Too complex. */
4481 value
|= ((~(-1 << width
) & exp
->X_add_number
)
4482 << ((BITS_PER_CHAR
* nbytes
) - bits_available
));
4484 if ((bits_available
-= width
) == 0
4485 || is_it_end_of_statement ()
4486 || *input_line_pointer
!= ',')
4489 } /* All the bitfields we're gonna get. */
4491 hold
= ++input_line_pointer
;
4492 (void) expression (exp
);
4495 exp
->X_add_number
= value
;
4496 exp
->X_op
= O_constant
;
4497 exp
->X_unsigned
= 1;
4501 #endif /* BITFIELD_CONS_EXPRESSIONS */
4503 /* Handle an MRI style string expression. */
4507 parse_mri_cons (exp
, nbytes
)
4509 unsigned int nbytes
;
4511 if (*input_line_pointer
!= '\''
4512 && (input_line_pointer
[1] != '\''
4513 || (*input_line_pointer
!= 'A'
4514 && *input_line_pointer
!= 'E')))
4515 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
4519 unsigned int result
= 0;
4521 /* An MRI style string. Cut into as many bytes as will fit into
4522 a nbyte chunk, left justify if necessary, and separate with
4523 commas so we can try again later. */
4524 if (*input_line_pointer
== 'A')
4525 ++input_line_pointer
;
4526 else if (*input_line_pointer
== 'E')
4528 as_bad (_("EBCDIC constants are not supported"));
4529 ++input_line_pointer
;
4532 input_line_pointer
++;
4533 for (scan
= 0; scan
< nbytes
; scan
++)
4535 if (*input_line_pointer
== '\'')
4537 if (input_line_pointer
[1] == '\'')
4539 input_line_pointer
++;
4544 result
= (result
<< 8) | (*input_line_pointer
++);
4548 while (scan
< nbytes
)
4554 /* Create correct expression. */
4555 exp
->X_op
= O_constant
;
4556 exp
->X_add_number
= result
;
4558 /* Fake it so that we can read the next char too. */
4559 if (input_line_pointer
[0] != '\'' ||
4560 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
4562 input_line_pointer
-= 2;
4563 input_line_pointer
[0] = ',';
4564 input_line_pointer
[1] = '\'';
4567 input_line_pointer
++;
4570 #endif /* TC_M68K */
4572 #ifdef REPEAT_CONS_EXPRESSIONS
4574 /* Parse a repeat expression for cons. This is used by the MIPS
4575 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4576 object file COUNT times.
4578 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4581 parse_repeat_cons (exp
, nbytes
)
4583 unsigned int nbytes
;
4590 if (*input_line_pointer
!= ':')
4592 /* No repeat count. */
4596 ++input_line_pointer
;
4597 expression (&count
);
4598 if (count
.X_op
!= O_constant
4599 || count
.X_add_number
<= 0)
4601 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4605 /* The cons function is going to output this expression once. So we
4606 output it count - 1 times. */
4607 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
4608 emit_expr (exp
, nbytes
);
4611 #endif /* REPEAT_CONS_EXPRESSIONS */
4613 /* Parse a floating point number represented as a hex constant. This
4614 permits users to specify the exact bits they want in the floating
4618 hex_float (int float_type
, char *bytes
)
4650 as_bad (_("unknown floating type type '%c'"), float_type
);
4654 /* It would be nice if we could go through expression to parse the
4655 hex constant, but if we get a bignum it's a pain to sort it into
4656 the buffer correctly. */
4658 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4662 /* The MRI assembler accepts arbitrary underscores strewn about
4663 through the hex constant, so we ignore them as well. */
4664 if (*input_line_pointer
== '_')
4666 ++input_line_pointer
;
4672 as_warn (_("floating point constant too large"));
4675 d
= hex_value (*input_line_pointer
) << 4;
4676 ++input_line_pointer
;
4677 while (*input_line_pointer
== '_')
4678 ++input_line_pointer
;
4679 if (hex_p (*input_line_pointer
))
4681 d
+= hex_value (*input_line_pointer
);
4682 ++input_line_pointer
;
4684 if (target_big_endian
)
4687 bytes
[length
- i
- 1] = d
;
4693 if (target_big_endian
)
4694 memset (bytes
+ i
, 0, length
- i
);
4696 memset (bytes
, 0, length
- i
);
4704 CONStruct some more frag chars of .floats .ffloats etc.
4705 Makes 0 or more new frags.
4706 If need_pass_2 == 1, no frags are emitted.
4707 This understands only floating literals, not expressions. Sorry.
4709 A floating constant is defined by atof_generic(), except it is preceded
4710 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4711 reading, I decided to be incompatible. This always tries to give you
4712 rounded bits to the precision of the pseudo-op. Former AS did premature
4713 truncation, restored noisy bits instead of trailing 0s AND gave you
4714 a choice of 2 flavours of noise according to which of 2 floating-point
4715 scanners you directed AS to use.
4717 In: input_line_pointer->whitespace before, or '0' of flonum. */
4720 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4721 int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4724 int length
; /* Number of chars in an object. */
4725 char *err
; /* Error from scanning floating literal. */
4726 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4728 if (is_it_end_of_statement ())
4730 demand_empty_rest_of_line ();
4734 #ifdef md_flush_pending_output
4735 md_flush_pending_output ();
4738 #ifdef md_cons_align
4744 /* input_line_pointer->1st char of a flonum (we hope!). */
4747 /* Skip any 0{letter} that may be present. Don't even check if the
4748 letter is legal. Someone may invent a "z" format and this routine
4749 has no use for such information. Lusers beware: you get
4750 diagnostics if your input is ill-conditioned. */
4751 if (input_line_pointer
[0] == '0'
4752 && ISALPHA (input_line_pointer
[1]))
4753 input_line_pointer
+= 2;
4755 /* Accept :xxxx, where the x's are hex digits, for a floating
4756 point with the exact digits specified. */
4757 if (input_line_pointer
[0] == ':')
4759 ++input_line_pointer
;
4760 length
= hex_float (float_type
, temp
);
4763 ignore_rest_of_line ();
4769 err
= md_atof (float_type
, temp
, &length
);
4770 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
4771 know (err
!= NULL
|| length
> 0);
4774 as_bad (_("bad floating literal: %s"), err
);
4775 ignore_rest_of_line ();
4786 #ifdef REPEAT_CONS_EXPRESSIONS
4787 if (*input_line_pointer
== ':')
4789 expressionS count_exp
;
4791 ++input_line_pointer
;
4792 expression (&count_exp
);
4794 if (count_exp
.X_op
!= O_constant
4795 || count_exp
.X_add_number
<= 0)
4796 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4798 count
= count_exp
.X_add_number
;
4802 while (--count
>= 0)
4804 p
= frag_more (length
);
4805 memcpy (p
, temp
, (unsigned int) length
);
4810 while (*input_line_pointer
++ == ',');
4812 /* Put terminator back into stream. */
4813 --input_line_pointer
;
4814 demand_empty_rest_of_line ();
4817 /* Return the size of a LEB128 value. */
4820 sizeof_sleb128 (offsetT value
)
4827 byte
= (value
& 0x7f);
4828 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4829 Fortunately, we can structure things so that the extra work reduces
4830 to a noop on systems that do things "properly". */
4831 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4834 while (!(((value
== 0) && ((byte
& 0x40) == 0))
4835 || ((value
== -1) && ((byte
& 0x40) != 0))));
4841 sizeof_uleb128 (valueT value
)
4856 sizeof_leb128 (valueT value
, int sign
)
4859 return sizeof_sleb128 ((offsetT
) value
);
4861 return sizeof_uleb128 (value
);
4864 /* Output a LEB128 value. */
4867 output_sleb128 (char *p
, offsetT value
)
4874 unsigned byte
= (value
& 0x7f);
4876 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4877 Fortunately, we can structure things so that the extra work reduces
4878 to a noop on systems that do things "properly". */
4879 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4881 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
4882 || ((value
== -1) && ((byte
& 0x40) != 0))));
4894 output_uleb128 (char *p
, valueT value
)
4900 unsigned byte
= (value
& 0x7f);
4903 /* More bytes to follow. */
4914 output_leb128 (char *p
, valueT value
, int sign
)
4917 return output_sleb128 (p
, (offsetT
) value
);
4919 return output_uleb128 (p
, value
);
4922 /* Do the same for bignums. We combine sizeof with output here in that
4923 we don't output for NULL values of P. It isn't really as critical as
4924 for "normal" values that this be streamlined. */
4927 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4934 /* Strip leading sign extensions off the bignum. */
4936 && bignum
[size
- 1] == LITTLENUM_MASK
4937 && bignum
[size
- 2] > LITTLENUM_MASK
/ 2)
4942 /* OR in the next part of the littlenum. */
4943 val
|= (*bignum
<< loaded
);
4944 loaded
+= LITTLENUM_NUMBER_OF_BITS
;
4948 /* Add bytes until there are less than 7 bits left in VAL
4949 or until every non-sign bit has been written. */
4956 || val
!= ((byte
& 0x40) == 0 ? 0 : ((valueT
) 1 << loaded
) - 1))
4963 while ((byte
& 0x80) != 0 && loaded
>= 7);
4967 /* Mop up any left-over bits (of which there will be less than 7). */
4968 if ((byte
& 0x80) != 0)
4970 /* Sign-extend VAL. */
4971 if (val
& (1 << (loaded
- 1)))
4972 val
|= ~0 << loaded
;
4982 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4989 /* Strip leading zeros off the bignum. */
4990 /* XXX: Is this needed? */
4991 while (size
> 0 && bignum
[size
- 1] == 0)
4996 if (loaded
< 7 && size
> 0)
4998 val
|= (*bignum
<< loaded
);
4999 loaded
+= 8 * CHARS_PER_LITTLENUM
;
5008 if (size
> 0 || val
)
5015 while (byte
& 0x80);
5021 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
, int sign
)
5024 return output_big_sleb128 (p
, bignum
, size
);
5026 return output_big_uleb128 (p
, bignum
, size
);
5029 /* Generate the appropriate fragments for a given expression to emit a
5033 emit_leb128_expr (expressionS
*exp
, int sign
)
5035 operatorT op
= exp
->X_op
;
5036 unsigned int nbytes
;
5038 if (op
== O_absent
|| op
== O_illegal
)
5040 as_warn (_("zero assumed for missing expression"));
5041 exp
->X_add_number
= 0;
5044 else if (op
== O_big
&& exp
->X_add_number
<= 0)
5046 as_bad (_("floating point number invalid"));
5047 exp
->X_add_number
= 0;
5050 else if (op
== O_register
)
5052 as_warn (_("register value used as expression"));
5055 else if (op
== O_constant
5057 && (exp
->X_add_number
< 0) != !exp
->X_unsigned
)
5059 /* We're outputting a signed leb128 and the sign of X_add_number
5060 doesn't reflect the sign of the original value. Convert EXP
5061 to a correctly-extended bignum instead. */
5062 convert_to_bignum (exp
);
5066 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
5067 a signal that this is leb128 data. It shouldn't optimize this away. */
5068 nbytes
= (unsigned int) -1;
5069 if (check_eh_frame (exp
, &nbytes
))
5072 /* Let the backend know that subsequent data may be byte aligned. */
5073 #ifdef md_cons_align
5077 if (op
== O_constant
)
5079 /* If we've got a constant, emit the thing directly right now. */
5081 valueT value
= exp
->X_add_number
;
5085 size
= sizeof_leb128 (value
, sign
);
5086 p
= frag_more (size
);
5087 output_leb128 (p
, value
, sign
);
5089 else if (op
== O_big
)
5091 /* O_big is a different sort of constant. */
5096 size
= output_big_leb128 (NULL
, generic_bignum
, exp
->X_add_number
, sign
);
5097 p
= frag_more (size
);
5098 output_big_leb128 (p
, generic_bignum
, exp
->X_add_number
, sign
);
5102 /* Otherwise, we have to create a variable sized fragment and
5103 resolve things later. */
5105 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
5106 make_expr_symbol (exp
), 0, (char *) NULL
);
5110 /* Parse the .sleb128 and .uleb128 pseudos. */
5117 #ifdef md_flush_pending_output
5118 md_flush_pending_output ();
5124 emit_leb128_expr (&exp
, sign
);
5126 while (*input_line_pointer
++ == ',');
5128 input_line_pointer
--;
5129 demand_empty_rest_of_line ();
5133 stringer_append_char (int c
, int bitsize
)
5135 if (!target_big_endian
)
5136 FRAG_APPEND_1_CHAR (c
);
5141 FRAG_APPEND_1_CHAR (0);
5142 FRAG_APPEND_1_CHAR (0);
5143 FRAG_APPEND_1_CHAR (0);
5144 FRAG_APPEND_1_CHAR (0);
5147 FRAG_APPEND_1_CHAR (0);
5148 FRAG_APPEND_1_CHAR (0);
5151 FRAG_APPEND_1_CHAR (0);
5156 /* Called with invalid bitsize argument. */
5160 if (target_big_endian
)
5161 FRAG_APPEND_1_CHAR (c
);
5164 /* Worker to do .ascii etc statements.
5165 Reads 0 or more ',' separated, double-quoted strings.
5166 Caller should have checked need_pass_2 is FALSE because we don't
5168 Checks for end-of-line.
5169 BITS_APPENDZERO says how many bits are in a target char.
5170 The bottom bit is set if a NUL char should be appended to the strings. */
5173 stringer (int bits_appendzero
)
5175 const int bitsize
= bits_appendzero
& ~7;
5176 const int append_zero
= bits_appendzero
& 1;
5178 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5182 #ifdef md_flush_pending_output
5183 md_flush_pending_output ();
5186 #ifdef md_cons_align
5190 /* The following awkward logic is to parse ZERO or more strings,
5191 comma separated. Recall a string expression includes spaces
5192 before the opening '\"' and spaces after the closing '\"'.
5193 We fake a leading ',' if there is (supposed to be)
5194 a 1st, expression. We keep demanding expressions for each ','. */
5195 if (is_it_end_of_statement ())
5197 c
= 0; /* Skip loop. */
5198 ++input_line_pointer
; /* Compensate for end of loop. */
5202 c
= ','; /* Do loop. */
5204 /* If we have been switched into the abs_section then we
5205 will not have an obstack onto which we can hang strings. */
5206 if (now_seg
== absolute_section
)
5208 as_bad (_("strings must be placed into a section"));
5210 ignore_rest_of_line ();
5213 while (c
== ',' || c
== '<' || c
== '"')
5216 switch (*input_line_pointer
)
5219 ++input_line_pointer
; /*->1st char of string. */
5220 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5221 start
= input_line_pointer
;
5224 while (is_a_char (c
= next_char_of_string ()))
5225 stringer_append_char (c
, bitsize
);
5228 stringer_append_char (0, bitsize
);
5230 know (input_line_pointer
[-1] == '\"');
5232 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5233 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
5234 will emit .string with a filename in the .debug section
5235 after a sequence of constants. See the comment in
5236 emit_expr for the sequence. emit_expr will set
5237 dwarf_file_string to non-zero if this string might be a
5238 source file name. */
5239 if (strcmp (segment_name (now_seg
), ".debug") != 0)
5240 dwarf_file_string
= 0;
5241 else if (dwarf_file_string
)
5243 c
= input_line_pointer
[-1];
5244 input_line_pointer
[-1] = '\0';
5245 listing_source_file (start
);
5246 input_line_pointer
[-1] = c
;
5252 input_line_pointer
++;
5253 c
= get_single_number ();
5254 stringer_append_char (c
, bitsize
);
5255 if (*input_line_pointer
!= '>')
5256 as_bad (_("expected <nn>"));
5258 input_line_pointer
++;
5261 input_line_pointer
++;
5265 c
= *input_line_pointer
;
5268 demand_empty_rest_of_line ();
5271 /* FIXME-SOMEDAY: I had trouble here on characters with the
5272 high bits set. We'll probably also have trouble with
5273 multibyte chars, wide chars, etc. Also be careful about
5274 returning values bigger than 1 byte. xoxorich. */
5277 next_char_of_string (void)
5281 c
= *input_line_pointer
++ & CHAR_MASK
;
5289 as_warn (_("unterminated string; newline inserted"));
5290 bump_line_counters ();
5293 #ifndef NO_STRING_ESCAPES
5295 switch (c
= *input_line_pointer
++)
5323 break; /* As itself. */
5339 for (i
= 0, number
= 0;
5340 ISDIGIT (c
) && i
< 3;
5341 c
= *input_line_pointer
++, i
++)
5343 number
= number
* 8 + c
- '0';
5348 --input_line_pointer
;
5357 c
= *input_line_pointer
++;
5358 while (ISXDIGIT (c
))
5361 number
= number
* 16 + c
- '0';
5362 else if (ISUPPER (c
))
5363 number
= number
* 16 + c
- 'A' + 10;
5365 number
= number
* 16 + c
- 'a' + 10;
5366 c
= *input_line_pointer
++;
5369 --input_line_pointer
;
5374 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
5375 as_warn (_("unterminated string; newline inserted"));
5377 bump_line_counters ();
5382 #ifdef ONLY_STANDARD_ESCAPES
5383 as_bad (_("bad escaped character in string"));
5385 #endif /* ONLY_STANDARD_ESCAPES */
5390 #endif /* ! defined (NO_STRING_ESCAPES) */
5399 get_segmented_expression (expressionS
*expP
)
5403 retval
= expression (expP
);
5404 if (expP
->X_op
== O_illegal
5405 || expP
->X_op
== O_absent
5406 || expP
->X_op
== O_big
)
5408 as_bad (_("expected address expression"));
5409 expP
->X_op
= O_constant
;
5410 expP
->X_add_number
= 0;
5411 retval
= absolute_section
;
5417 get_known_segmented_expression (expressionS
*expP
)
5421 if ((retval
= get_segmented_expression (expP
)) == undefined_section
)
5423 /* There is no easy way to extract the undefined symbol from the
5425 if (expP
->X_add_symbol
!= NULL
5426 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
5427 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5428 S_GET_NAME (expP
->X_add_symbol
));
5430 as_warn (_("some symbol undefined; zero assumed"));
5431 retval
= absolute_section
;
5432 expP
->X_op
= O_constant
;
5433 expP
->X_add_number
= 0;
5435 know (retval
== absolute_section
|| SEG_NORMAL (retval
));
5439 char /* Return terminator. */
5440 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
5442 /* FIXME: val_pointer should probably be offsetT *. */
5443 *val_pointer
= (long) get_absolute_expression ();
5444 return (*input_line_pointer
++);
5447 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
5448 Give a warning if that happens. */
5451 demand_copy_C_string (int *len_pointer
)
5455 if ((s
= demand_copy_string (len_pointer
)) != 0)
5459 for (len
= *len_pointer
; len
> 0; len
--)
5466 as_bad (_("this string may not contain \'\\0\'"));
5474 /* Demand string, but return a safe (=private) copy of the string.
5475 Return NULL if we can't read a string here. */
5478 demand_copy_string (int *lenP
)
5486 if (*input_line_pointer
== '\"')
5488 input_line_pointer
++; /* Skip opening quote. */
5490 while (is_a_char (c
= next_char_of_string ()))
5492 obstack_1grow (¬es
, c
);
5495 /* JF this next line is so demand_copy_C_string will return a
5496 null terminated string. */
5497 obstack_1grow (¬es
, '\0');
5498 retval
= (char *) obstack_finish (¬es
);
5502 as_bad (_("missing string"));
5504 ignore_rest_of_line ();
5510 /* In: Input_line_pointer->next character.
5512 Do: Skip input_line_pointer over all whitespace.
5514 Out: 1 if input_line_pointer->end-of-line. */
5517 is_it_end_of_statement (void)
5520 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
5524 equals (char *sym_name
, int reassign
)
5529 input_line_pointer
++;
5530 if (*input_line_pointer
== '=')
5531 input_line_pointer
++;
5532 if (reassign
< 0 && *input_line_pointer
== '=')
5533 input_line_pointer
++;
5535 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
5536 input_line_pointer
++;
5539 stop
= mri_comment_field (&stopc
);
5541 assign_symbol (sym_name
, reassign
>= 0 ? !reassign
: reassign
);
5545 demand_empty_rest_of_line ();
5546 mri_comment_end (stop
, stopc
);
5550 /* .incbin -- include a file verbatim at the current location. */
5553 s_incbin (int x ATTRIBUTE_UNUSED
)
5564 #ifdef md_flush_pending_output
5565 md_flush_pending_output ();
5568 #ifdef md_cons_align
5573 filename
= demand_copy_string (& len
);
5574 if (filename
== NULL
)
5579 /* Look for optional skip and count. */
5580 if (* input_line_pointer
== ',')
5582 ++ input_line_pointer
;
5583 skip
= get_absolute_expression ();
5587 if (* input_line_pointer
== ',')
5589 ++ input_line_pointer
;
5591 count
= get_absolute_expression ();
5593 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
5599 demand_empty_rest_of_line ();
5601 /* Try opening absolute path first, then try include dirs. */
5602 binfile
= fopen (filename
, FOPEN_RB
);
5603 if (binfile
== NULL
)
5607 path
= (char *) xmalloc ((unsigned long) len
+ include_dir_maxlen
+ 5);
5609 for (i
= 0; i
< include_dir_count
; i
++)
5611 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
5613 binfile
= fopen (path
, FOPEN_RB
);
5614 if (binfile
!= NULL
)
5618 if (binfile
== NULL
)
5619 as_bad (_("file not found: %s"), filename
);
5622 path
= xstrdup (filename
);
5628 register_dependency (path
);
5630 /* Compute the length of the file. */
5631 if (fseek (binfile
, 0, SEEK_END
) != 0)
5633 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
5636 file_len
= ftell (binfile
);
5638 /* If a count was not specified use the remainder of the file. */
5640 count
= file_len
- skip
;
5642 if (skip
< 0 || count
< 0 || file_len
< 0 || skip
+ count
> file_len
)
5644 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5645 skip
, count
, file_len
);
5649 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
5651 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
5655 /* Allocate frag space and store file contents in it. */
5656 binfrag
= frag_more (count
);
5658 bytes
= fread (binfrag
, 1, count
, binfile
);
5660 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5661 path
, bytes
, count
);
5664 if (binfile
!= NULL
)
5670 /* .include -- include a file at this point. */
5673 s_include (int arg ATTRIBUTE_UNUSED
)
5682 filename
= demand_copy_string (&i
);
5683 if (filename
== NULL
)
5685 /* demand_copy_string has already printed an error and
5686 called ignore_rest_of_line. */
5694 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
5695 && *input_line_pointer
!= ' '
5696 && *input_line_pointer
!= '\t')
5698 obstack_1grow (¬es
, *input_line_pointer
);
5699 ++input_line_pointer
;
5703 obstack_1grow (¬es
, '\0');
5704 filename
= (char *) obstack_finish (¬es
);
5705 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5706 ++input_line_pointer
;
5709 demand_empty_rest_of_line ();
5710 path
= (char *) xmalloc ((unsigned long) i
5711 + include_dir_maxlen
+ 5 /* slop */ );
5713 for (i
= 0; i
< include_dir_count
; i
++)
5715 strcpy (path
, include_dirs
[i
]);
5717 strcat (path
, filename
);
5718 if (0 != (try_file
= fopen (path
, FOPEN_RT
)))
5728 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5729 register_dependency (path
);
5730 input_scrub_insert_file (path
);
5734 add_include_dir (char *path
)
5738 if (include_dir_count
== 0)
5740 include_dirs
= (char **) xmalloc (2 * sizeof (*include_dirs
));
5741 include_dirs
[0] = "."; /* Current dir. */
5742 include_dir_count
= 2;
5746 include_dir_count
++;
5748 (char **) realloc (include_dirs
,
5749 include_dir_count
* sizeof (*include_dirs
));
5752 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
5755 if (i
> include_dir_maxlen
)
5756 include_dir_maxlen
= i
;
5759 /* Output debugging information to denote the source file. */
5762 generate_file_debug (void)
5764 if (debug_type
== DEBUG_STABS
)
5765 stabs_generate_asm_file ();
5768 /* Output line number debugging information for the current source line. */
5771 generate_lineno_debug (void)
5775 case DEBUG_UNSPECIFIED
:
5780 stabs_generate_asm_lineno ();
5783 ecoff_generate_asm_lineno ();
5786 /* ??? We could here indicate to dwarf2dbg.c that something
5787 has changed. However, since there is additional backend
5788 support that is required (calling dwarf2_emit_insn), we
5789 let dwarf2dbg.c call as_where on its own. */
5794 /* Output debugging information to mark a function entry point or end point.
5795 END_P is zero for .func, and non-zero for .endfunc. */
5800 do_s_func (end_p
, NULL
);
5803 /* Subroutine of s_func so targets can choose a different default prefix.
5804 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5807 do_s_func (int end_p
, const char *default_prefix
)
5809 /* Record the current function so that we can issue an error message for
5810 misplaced .func,.endfunc, and also so that .endfunc needs no
5812 static char *current_name
;
5813 static char *current_label
;
5817 if (current_name
== NULL
)
5819 as_bad (_("missing .func"));
5820 ignore_rest_of_line ();
5824 if (debug_type
== DEBUG_STABS
)
5825 stabs_generate_asm_endfunc (current_name
, current_label
);
5827 current_name
= current_label
= NULL
;
5832 char delim1
, delim2
;
5834 if (current_name
!= NULL
)
5836 as_bad (_(".endfunc missing for previous .func"));
5837 ignore_rest_of_line ();
5841 name
= input_line_pointer
;
5842 delim1
= get_symbol_end ();
5843 name
= xstrdup (name
);
5844 *input_line_pointer
= delim1
;
5846 if (*input_line_pointer
!= ',')
5850 if (asprintf (&label
, "%s%s", default_prefix
, name
) == -1)
5851 as_fatal ("%s", xstrerror (errno
));
5855 char leading_char
= bfd_get_symbol_leading_char (stdoutput
);
5856 /* Missing entry point, use function's name with the leading
5860 if (asprintf (&label
, "%c%s", leading_char
, name
) == -1)
5861 as_fatal ("%s", xstrerror (errno
));
5869 ++input_line_pointer
;
5871 label
= input_line_pointer
;
5872 delim2
= get_symbol_end ();
5873 label
= xstrdup (label
);
5874 *input_line_pointer
= delim2
;
5877 if (debug_type
== DEBUG_STABS
)
5878 stabs_generate_asm_func (name
, label
);
5880 current_name
= name
;
5881 current_label
= label
;
5884 demand_empty_rest_of_line ();
5888 s_ignore (int arg ATTRIBUTE_UNUSED
)
5890 ignore_rest_of_line ();
5894 read_print_statistics (FILE *file
)
5896 hash_print_statistics (file
, "pseudo-op table", po_hash
);
5899 /* Inserts the given line into the input stream.
5901 This call avoids macro/conditionals nesting checking, since the contents of
5902 the line are assumed to replace the contents of a line already scanned.
5904 An appropriate use of this function would be substitution of input lines when
5905 called by md_start_line_hook(). The given line is assumed to already be
5906 properly scrubbed. */
5909 input_scrub_insert_line (const char *line
)
5913 sb_add_string (&newline
, line
);
5914 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
5916 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5919 /* Insert a file into the input stream; the path must resolve to an actual
5920 file; no include path searching or dependency registering is performed. */
5923 input_scrub_insert_file (char *path
)
5925 input_scrub_include_file (path
, input_line_pointer
);
5926 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5929 /* Find the end of a line, considering quotation and escaping of quotes. */
5931 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5932 # define TC_SINGLE_QUOTE_STRINGS 1
5936 _find_end_of_line (char *s
, int mri_string
, int insn ATTRIBUTE_UNUSED
,
5939 char inquote
= '\0';
5942 while (!is_end_of_line
[(unsigned char) *s
]
5943 || (inquote
&& !ISCNTRL (*s
))
5944 || (inquote
== '\'' && flag_mri
)
5945 #ifdef TC_EOL_IN_INSN
5946 || (insn
&& TC_EOL_IN_INSN (s
))
5948 /* PR 6926: When we are parsing the body of a macro the sequence
5949 \@ is special - it refers to the invocation count. If the @
5950 character happens to be registered as a line-separator character
5951 by the target, then the is_end_of_line[] test above will have
5952 returned true, but we need to ignore the line separating
5953 semantics in this particular case. */
5954 || (in_macro
&& inescape
&& *s
== '@')
5957 if (mri_string
&& *s
== '\'')
5961 else if (*s
== '\\')
5965 #ifdef TC_SINGLE_QUOTE_STRINGS
5966 || (TC_SINGLE_QUOTE_STRINGS
&& *s
== '\'')
5973 as_warn (_("missing closing `%c'"), inquote
);
5975 as_warn (_("stray `\\'"));
5980 find_end_of_line (char *s
, int mri_string
)
5982 return _find_end_of_line (s
, mri_string
, 0, 0);