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
4 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 2, 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"
43 #include "dw2gencfi.h"
45 #ifndef TC_START_LABEL
46 #define TC_START_LABEL(x,y) (x == ':')
49 /* Set by the object-format or the target. */
50 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
51 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
56 else if ((SIZE) >= 4) \
58 else if ((SIZE) >= 2) \
66 char *input_line_pointer
; /*->next char of source file to parse. */
68 #if BITS_PER_CHAR != 8
69 /* The following table is indexed by[(char)] and will break if
70 a char does not have exactly 256 states (hopefully 0:255!)! */
75 /* The m88k unfortunately uses @ as a label beginner. */
80 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
85 /* The Delta 68k assembler permits % inside label names. */
90 /* The PowerPC Windows NT assemblers permits ? inside label names. */
95 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
96 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
101 /* The a29k assembler does not permits labels to start with $. */
106 /* The Delta 68k assembler permits ~ at start of label names. */
110 /* Used by is_... macros. our ctype[]. */
111 char lex_type
[256] = {
112 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
113 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
114 0, 0, 0, LEX_HASH
, LEX_DOLLAR
, LEX_PCT
, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
115 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM
, /* 0123456789:;<=>? */
116 LEX_AT
, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
117 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, 0, 3, /* PQRSTUVWXYZ[\]^_ */
118 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
119 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, LEX_TILDE
, 0, /* pqrstuvwxyz{|}~. */
120 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
121 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
122 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
123 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
124 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
125 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
126 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
127 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
131 Out: 1 if this character ends a line. */
132 char is_end_of_line
[256] = {
134 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
136 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
140 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
141 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
142 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
143 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
144 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
145 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
146 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
147 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
148 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
150 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
151 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
152 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
155 #ifndef TC_CASE_SENSITIVE
156 char original_case_string
[128];
159 /* Functions private to this file. */
161 static char *buffer
; /* 1st char of each buffer of lines is here. */
162 static char *buffer_limit
; /*->1 + last char in buffer. */
164 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
165 in the tc-<CPU>.h file. See the "Porting GAS" section of the
167 int target_big_endian
= TARGET_BYTES_BIG_ENDIAN
;
169 /* Variables for handling include file directory table. */
171 /* Table of pointers to directories to search for .include's. */
174 /* How many are in the table. */
175 int include_dir_count
;
177 /* Length of longest in table. */
178 int include_dir_maxlen
= 1;
180 #ifndef WORKING_DOT_WORD
181 struct broken_word
*broken_words
;
182 int new_broken_words
;
185 /* The current offset into the absolute section. We don't try to
186 build frags in the absolute section, since no data can be stored
187 there. We just keep track of the current offset. */
188 addressT abs_section_offset
;
190 /* If this line had an MRI style label, it is stored in this variable.
191 This is used by some of the MRI pseudo-ops. */
194 /* This global variable is used to support MRI common sections. We
195 translate such sections into a common symbol. This variable is
196 non-NULL when we are in an MRI common section. */
197 symbolS
*mri_common_symbol
;
199 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
200 need to align to an even byte boundary unless the next pseudo-op is
201 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
203 static int mri_pending_align
;
207 /* This variable is set to be non-zero if the next string we see might
208 be the name of the source file in DWARF debugging information. See
209 the comment in emit_expr for the format we look for. */
210 static int dwarf_file_string
;
214 static void do_s_func (int end_p
, const char *default_prefix
);
215 static void do_align (int, char *, int, int);
216 static void s_align (int, int);
217 static void s_altmacro (int);
218 static void s_bad_end (int);
219 static int hex_float (int, char *);
220 static segT
get_known_segmented_expression (expressionS
* expP
);
221 static void pobegin (void);
222 static int get_line_sb (sb
*);
223 static void generate_file_debug (void);
224 static char *_find_end_of_line (char *, int, int);
232 obj_read_begin_hook ();
234 /* Something close -- but not too close -- to a multiple of 1024.
235 The debugging malloc I'm using has 24 bytes of overhead. */
236 obstack_begin (¬es
, chunksize
);
237 obstack_begin (&cond_obstack
, chunksize
);
239 /* Use machine dependent syntax. */
240 for (p
= line_separator_chars
; *p
; p
++)
241 is_end_of_line
[(unsigned char) *p
] = 1;
242 /* Use more. FIXME-SOMEDAY. */
248 #ifndef TC_ADDRESS_BYTES
250 #define TC_ADDRESS_BYTES address_bytes
255 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
256 contain an address. */
257 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
, 0},
275 {"asciz", stringer
, 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},
331 {"error", s_errwarn
, 1},
332 {"exitm", s_mexit
, 0},
334 {"extern", s_ignore
, 0}, /* We treat all undef as ext. */
335 {"appfile", s_app_file
, 1},
336 {"appline", s_app_line
, 0},
338 {"file", s_app_file
, 0},
340 {"float", float_cons
, 'f'},
341 {"format", s_ignore
, 0},
343 {"global", s_globl
, 0},
344 {"globl", s_globl
, 0},
346 {"if", s_if
, (int) O_ne
},
349 {"ifdef", s_ifdef
, 0},
350 {"ifeq", s_if
, (int) O_eq
},
351 {"ifeqs", s_ifeqs
, 0},
352 {"ifge", s_if
, (int) O_ge
},
353 {"ifgt", s_if
, (int) O_gt
},
354 {"ifle", s_if
, (int) O_le
},
355 {"iflt", s_if
, (int) O_lt
},
358 {"ifndef", s_ifdef
, 1},
359 {"ifne", s_if
, (int) O_ne
},
360 {"ifnes", s_ifeqs
, 1},
361 {"ifnotdef", s_ifdef
, 1},
362 {"incbin", s_incbin
, 0},
363 {"include", s_include
, 0},
369 {"lcomm", s_lcomm
, 0},
370 {"lflags", listing_flags
, 0}, /* Listing flags. */
371 {"linkonce", s_linkonce
, 0},
372 {"list", listing_list
, 1}, /* Turn listing on. */
373 {"llen", listing_psize
, 1},
376 {"macro", s_macro
, 0},
377 {"mexit", s_mexit
, 0},
379 {".mri", s_mri
, 0}, /* Special case so .mri works in MRI mode. */
380 {"name", s_ignore
, 0},
381 {"noaltmacro", s_altmacro
, 0},
382 {"noformat", s_ignore
, 0},
383 {"nolist", listing_list
, 0}, /* Turn listing off. */
384 {"nopage", listing_nopage
, 0},
386 {"offset", s_struct
, 0},
388 {"p2align", s_align_ptwo
, 0},
389 {"p2alignw", s_align_ptwo
, -2},
390 {"p2alignl", s_align_ptwo
, -4},
391 {"page", listing_eject
, 0},
392 {"plen", listing_psize
, 0},
393 {"print", s_print
, 0},
394 {"psize", listing_psize
, 0}, /* Set paper size. */
395 {"purgem", s_purgem
, 0},
400 {"sbttl", listing_title
, 1}, /* Subtitle of listing. */
405 {"single", float_cons
, 'f'},
407 {"space", s_space
, 0},
408 {"skip", s_space
, 0},
409 {"sleb128", s_leb128
, 1},
410 {"spc", s_ignore
, 0},
411 {"stabd", s_stab
, 'd'},
412 {"stabn", s_stab
, 'n'},
413 {"stabs", s_stab
, 's'},
414 {"string", stringer
, 1},
415 {"struct", s_struct
, 0},
419 /* This is for gcc to use. It's only just been added (2/94), so gcc
420 won't be able to use it for a while -- probably a year or more.
421 But once this has been released, check with gcc maintainers
422 before deleting it or even changing the spelling. */
423 {"this_GCC_requires_the_GNU_assembler", s_ignore
, 0},
424 /* If we're folding case -- done for some targets, not necessarily
425 all -- the above string in an input file will be converted to
426 this one. Match it either way... */
427 {"this_gcc_requires_the_gnu_assembler", s_ignore
, 0},
429 {"title", listing_title
, 0}, /* Listing title. */
430 {"ttl", listing_title
, 0},
432 {"uleb128", s_leb128
, 0},
436 {"xdef", s_globl
, 0},
437 {"xref", s_ignore
, 0},
438 {"xstabs", s_xstab
, 's'},
439 {"warning", s_errwarn
, 0},
441 {"zero", s_space
, 0},
442 {NULL
, NULL
, 0} /* End sentinel. */
446 get_absolute_expr (expressionS
*exp
)
449 if (exp
->X_op
!= O_constant
)
451 if (exp
->X_op
!= O_absent
)
452 as_bad (_("bad or irreducible absolute expression"));
453 exp
->X_add_number
= 0;
455 return exp
->X_add_number
;
459 get_absolute_expression (void)
463 return get_absolute_expr (&exp
);
466 static int pop_override_ok
= 0;
467 static const char *pop_table_name
;
470 pop_insert (const pseudo_typeS
*table
)
473 const pseudo_typeS
*pop
;
474 for (pop
= table
; pop
->poc_name
; pop
++)
476 errtxt
= hash_insert (po_hash
, pop
->poc_name
, (char *) pop
);
477 if (errtxt
&& (!pop_override_ok
|| strcmp (errtxt
, "exists")))
478 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name
,
483 #ifndef md_pop_insert
484 #define md_pop_insert() pop_insert(md_pseudo_table)
487 #ifndef obj_pop_insert
488 #define obj_pop_insert() pop_insert(obj_pseudo_table)
491 #ifndef cfi_pop_insert
492 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
498 po_hash
= hash_new ();
500 /* Do the target-specific pseudo ops. */
501 pop_table_name
= "md";
504 /* Now object specific. Skip any that were in the target table. */
505 pop_table_name
= "obj";
509 /* Now portable ones. Skip any that we've seen already. */
510 pop_table_name
= "standard";
511 pop_insert (potable
);
513 #ifdef TARGET_USE_CFIPOP
514 pop_table_name
= "cfi";
520 #define HANDLE_CONDITIONAL_ASSEMBLY() \
521 if (ignore_input ()) \
523 char *eol = find_end_of_line (input_line_pointer, flag_m68k_mri); \
524 input_line_pointer = (input_line_pointer <= buffer_limit \
525 && eol >= buffer_limit) \
531 /* This function is used when scrubbing the characters between #APP
534 static char *scrub_string
;
535 static char *scrub_string_end
;
538 scrub_from_string (char *buf
, int buflen
)
542 copy
= scrub_string_end
- scrub_string
;
545 memcpy (buf
, scrub_string
, copy
);
546 scrub_string
+= copy
;
550 /* Helper function of read_a_source_file, which tries to expand a macro. */
552 try_macro (char term
, const char *line
)
558 if (check_macro (line
, &out
, &err
, ¯o
))
562 *input_line_pointer
++ = term
;
563 input_scrub_include_sb (&out
,
564 input_line_pointer
, 1);
567 input_scrub_next_buffer (&input_line_pointer
);
569 md_macro_info (macro
);
576 /* We read the file, putting things into a web that represents what we
577 have been reading. */
579 read_a_source_file (char *name
)
582 register char *s
; /* String of symbol, '\0' appended. */
590 buffer
= input_scrub_new_file (name
);
593 listing_newline (NULL
);
594 register_dependency (name
);
596 /* Generate debugging information before we've read anything in to denote
597 this file as the "main" source file and not a subordinate one
598 (e.g. N_SO vs N_SOL in stabs). */
599 generate_file_debug ();
601 while ((buffer_limit
= input_scrub_next_buffer (&input_line_pointer
)) != 0)
602 { /* We have another line to parse. */
604 /* In order to avoid listing macro expansion lines with labels
605 multiple times, keep track of which line was last issued. */
606 static char *last_eol
;
610 know (buffer_limit
[-1] == '\n'); /* Must have a sentinel. */
612 while (input_line_pointer
< buffer_limit
)
614 /* We have more of this buffer to parse. */
616 /* We now have input_line_pointer->1st char of next line.
617 If input_line_pointer [-1] == '\n' then we just
618 scanned another line: so bump line counters. */
619 if (is_end_of_line
[(unsigned char) input_line_pointer
[-1]])
621 #ifdef md_start_line_hook
622 md_start_line_hook ();
624 if (input_line_pointer
[-1] == '\n')
625 bump_line_counters ();
629 if (LABELS_WITHOUT_COLONS
|| flag_m68k_mri
)
631 /* Text at the start of a line must be a label, we
632 run down and stick a colon in. */
633 if (is_name_beginner (*input_line_pointer
))
635 char *line_start
= input_line_pointer
;
640 HANDLE_CONDITIONAL_ASSEMBLY ();
642 c
= get_symbol_end ();
644 /* In MRI mode, the EQU and MACRO pseudoops must
645 be handled specially. */
649 char *rest
= input_line_pointer
+ 1;
653 if (*rest
== ' ' || *rest
== '\t')
655 if ((strncasecmp (rest
, "EQU", 3) == 0
656 || strncasecmp (rest
, "SET", 3) == 0)
657 && (rest
[3] == ' ' || rest
[3] == '\t'))
659 input_line_pointer
= rest
+ 3;
661 strncasecmp (rest
, "SET", 3) == 0);
664 if (strncasecmp (rest
, "MACRO", 5) == 0
667 || is_end_of_line
[(unsigned char) rest
[5]]))
671 /* In MRI mode, we need to handle the MACRO
672 pseudo-op specially: we don't want to put the
673 symbol in the symbol table. */
675 #ifdef TC_START_LABEL_WITHOUT_COLON
676 && TC_START_LABEL_WITHOUT_COLON(c
,
680 line_label
= colon (line_start
);
682 line_label
= symbol_create (line_start
,
687 *input_line_pointer
= c
;
689 input_line_pointer
++;
694 /* We are at the beginning of a line, or similar place.
695 We expect a well-formed assembler statement.
696 A "symbol-name:" is a statement.
698 Depending on what compiler is used, the order of these tests
699 may vary to catch most common case 1st.
700 Each test is independent of all other tests at the (top) level.
701 PLEASE make a compiler that doesn't use this assembler.
702 It is crufty to waste a compiler's time encoding things for this
703 assembler, which then wastes more time decoding it.
704 (And communicating via (linear) files is silly!
705 If you must pass stuff, please pass a tree!) */
706 if ((c
= *input_line_pointer
++) == '\t'
710 c
= *input_line_pointer
++;
712 know (c
!= ' '); /* No further leading whitespace. */
715 /* If listing is on, and we are expanding a macro, then give
716 the listing code the contents of the expanded line. */
719 if ((listing
& LISTING_MACEXP
) && macro_nest
> 0)
724 /* Find the end of the current expanded macro line. */
725 s
= find_end_of_line (input_line_pointer
- 1, flag_m68k_mri
);
730 /* Copy it for safe keeping. Also give an indication of
731 how much macro nesting is involved at this point. */
732 len
= s
- (input_line_pointer
- 1);
733 copy
= (char *) xmalloc (len
+ macro_nest
+ 2);
734 memset (copy
, '>', macro_nest
);
735 copy
[macro_nest
] = ' ';
736 memcpy (copy
+ macro_nest
+ 1, input_line_pointer
- 1, len
);
737 copy
[macro_nest
+ 1 + len
] = '\0';
739 /* Install the line with the listing facility. */
740 listing_newline (copy
);
744 listing_newline (NULL
);
747 /* C is the 1st significant character.
748 Input_line_pointer points after that character. */
749 if (is_name_beginner (c
))
751 /* Want user-defined label or pseudo/opcode. */
752 HANDLE_CONDITIONAL_ASSEMBLY ();
754 s
= --input_line_pointer
;
755 c
= get_symbol_end (); /* name's delimiter. */
757 /* C is character after symbol.
758 That character's place in the input line is now '\0'.
759 S points to the beginning of the symbol.
760 [In case of pseudo-op, s->'.'.]
761 Input_line_pointer->'\0' where c was. */
762 if (TC_START_LABEL (c
, input_line_pointer
))
766 char *rest
= input_line_pointer
+ 1;
768 /* In MRI mode, \tsym: set 0 is permitted. */
772 if (*rest
== ' ' || *rest
== '\t')
775 if ((strncasecmp (rest
, "EQU", 3) == 0
776 || strncasecmp (rest
, "SET", 3) == 0)
777 && (rest
[3] == ' ' || rest
[3] == '\t'))
779 input_line_pointer
= rest
+ 3;
785 line_label
= colon (s
); /* User-defined label. */
786 /* Put ':' back for error messages' sake. */
787 *input_line_pointer
++ = ':';
788 #ifdef tc_check_label
789 tc_check_label (line_label
);
791 /* Input_line_pointer->after ':'. */
795 || ((c
== ' ' || c
== '\t')
796 && input_line_pointer
[1] == '='))
797 #ifdef TC_EQUAL_IN_INSN
798 && !TC_EQUAL_IN_INSN (c
, s
)
803 demand_empty_rest_of_line ();
807 /* Expect pseudo-op or machine instruction. */
810 #ifndef TC_CASE_SENSITIVE
814 strncpy (original_case_string
, s2
, sizeof (original_case_string
));
815 original_case_string
[sizeof (original_case_string
) - 1] = 0;
824 if (NO_PSEUDO_DOT
|| flag_m68k_mri
)
826 /* The MRI assembler and the m88k use pseudo-ops
828 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
);
829 if (pop
!= NULL
&& pop
->poc_handler
== NULL
)
834 || (!flag_m68k_mri
&& *s
== '.'))
838 WARNING: c has next char, which may be end-of-line.
839 We lookup the pseudo-op table with s+1 because we
840 already know that the pseudo-op begins with a '.'. */
843 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
+ 1);
844 if (pop
&& !pop
->poc_handler
)
847 /* In MRI mode, we may need to insert an
848 automatic alignment directive. What a hack
850 if (mri_pending_align
852 || !((pop
->poc_handler
== cons
853 && pop
->poc_val
== 1)
854 || (pop
->poc_handler
== s_space
855 && pop
->poc_val
== 1)
856 #ifdef tc_conditional_pseudoop
857 || tc_conditional_pseudoop (pop
)
859 || pop
->poc_handler
== s_if
860 || pop
->poc_handler
== s_ifdef
861 || pop
->poc_handler
== s_ifc
862 || pop
->poc_handler
== s_ifeqs
863 || pop
->poc_handler
== s_else
864 || pop
->poc_handler
== s_endif
865 || pop
->poc_handler
== s_globl
866 || pop
->poc_handler
== s_ignore
)))
868 do_align (1, (char *) NULL
, 0, 0);
869 mri_pending_align
= 0;
871 if (line_label
!= NULL
)
873 symbol_set_frag (line_label
, frag_now
);
874 S_SET_VALUE (line_label
, frag_now_fix ());
878 /* Print the error msg now, while we still can. */
881 char *end
= input_line_pointer
;
883 *input_line_pointer
= c
;
885 c
= *--input_line_pointer
;
886 *input_line_pointer
= '\0';
887 if (! macro_defined
|| ! try_macro (c
, s
))
890 as_bad (_("unknown pseudo-op: `%s'"), s
);
891 *input_line_pointer
++ = c
;
896 /* Put it back for error messages etc. */
897 *input_line_pointer
= c
;
898 /* The following skip of whitespace is compulsory.
899 A well shaped space is sometimes all that separates
900 keyword from operands. */
901 if (c
== ' ' || c
== '\t')
902 input_line_pointer
++;
904 /* Input_line is restored.
905 Input_line_pointer->1st non-blank char
906 after pseudo-operation. */
907 (*pop
->poc_handler
) (pop
->poc_val
);
909 /* If that was .end, just get out now. */
910 if (pop
->poc_handler
== s_end
)
915 /* WARNING: c has char, which may be end-of-line. */
916 /* Also: input_line_pointer->`\0` where c was. */
917 *input_line_pointer
= c
;
918 input_line_pointer
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 1);
919 c
= *input_line_pointer
;
920 *input_line_pointer
= '\0';
922 generate_lineno_debug ();
924 if (macro_defined
&& try_macro (c
, s
))
927 if (mri_pending_align
)
929 do_align (1, (char *) NULL
, 0, 0);
930 mri_pending_align
= 0;
931 if (line_label
!= NULL
)
933 symbol_set_frag (line_label
, frag_now
);
934 S_SET_VALUE (line_label
, frag_now_fix ());
938 md_assemble (s
); /* Assemble 1 instruction. */
940 *input_line_pointer
++ = c
;
942 /* We resume loop AFTER the end-of-line from
949 /* Empty statement? */
950 if (is_end_of_line
[(unsigned char) c
])
953 if ((LOCAL_LABELS_DOLLAR
|| LOCAL_LABELS_FB
) && ISDIGIT (c
))
955 /* local label ("4:") */
956 char *backup
= input_line_pointer
;
958 HANDLE_CONDITIONAL_ASSEMBLY ();
962 /* Read the whole number. */
963 while (ISDIGIT (*input_line_pointer
))
965 temp
= (temp
* 10) + *input_line_pointer
- '0';
966 ++input_line_pointer
;
969 if (LOCAL_LABELS_DOLLAR
970 && *input_line_pointer
== '$'
971 && *(input_line_pointer
+ 1) == ':')
973 input_line_pointer
+= 2;
975 if (dollar_label_defined (temp
))
977 as_fatal (_("label \"%d$\" redefined"), temp
);
980 define_dollar_label (temp
);
981 colon (dollar_label_name (temp
, 0));
986 && *input_line_pointer
++ == ':')
988 fb_label_instance_inc (temp
);
989 colon (fb_label_name (temp
, 0));
993 input_line_pointer
= backup
;
994 } /* local label ("4:") */
996 if (c
&& strchr (line_comment_chars
, c
))
997 { /* Its a comment. Better say APP or NO_APP. */
1002 unsigned int new_length
;
1005 bump_line_counters ();
1006 s
= input_line_pointer
;
1007 if (strncmp (s
, "APP\n", 4))
1008 continue; /* We ignore it */
1012 ends
= strstr (s
, "#NO_APP\n");
1016 unsigned int tmp_len
;
1019 /* The end of the #APP wasn't in this buffer. We
1020 keep reading in buffers until we find the #NO_APP
1021 that goes with this #APP There is one. The specs
1023 tmp_len
= buffer_limit
- s
;
1024 tmp_buf
= xmalloc (tmp_len
+ 1);
1025 memcpy (tmp_buf
, s
, tmp_len
);
1028 new_tmp
= input_scrub_next_buffer (&buffer
);
1032 buffer_limit
= new_tmp
;
1033 input_line_pointer
= buffer
;
1034 ends
= strstr (buffer
, "#NO_APP\n");
1036 num
= ends
- buffer
;
1038 num
= buffer_limit
- buffer
;
1040 tmp_buf
= xrealloc (tmp_buf
, tmp_len
+ num
);
1041 memcpy (tmp_buf
+ tmp_len
, buffer
, num
);
1046 input_line_pointer
= ends
? ends
+ 8 : NULL
;
1054 input_line_pointer
= ends
+ 8;
1058 scrub_string_end
= ends
;
1060 new_length
= ends
- s
;
1061 new_buf
= (char *) xmalloc (new_length
);
1068 space
= (new_buf
+ new_length
) - new_tmp
;
1069 size
= do_scrub_chars (scrub_from_string
, new_tmp
, space
);
1077 new_buf
= xrealloc (new_buf
, new_length
+ 100);
1078 new_tmp
= new_buf
+ new_length
;
1085 /* We've "scrubbed" input to the preferred format. In the
1086 process we may have consumed the whole of the remaining
1087 file (and included files). We handle this formatted
1088 input similar to that of macro expansion, letting
1089 actual macro expansion (possibly nested) and other
1090 input expansion work. Beware that in messages, line
1091 numbers and possibly file names will be incorrect. */
1092 sb_add_string (&sbuf
, new_buf
);
1093 input_scrub_include_sb (&sbuf
, input_line_pointer
, 0);
1095 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1100 HANDLE_CONDITIONAL_ASSEMBLY ();
1102 #ifdef tc_unrecognized_line
1103 if (tc_unrecognized_line (c
))
1106 input_line_pointer
--;
1107 /* Report unknown char as ignored. */
1108 demand_empty_rest_of_line ();
1111 #ifdef md_after_pass_hook
1112 md_after_pass_hook ();
1121 /* Close the input file. */
1122 input_scrub_close ();
1123 #ifdef WARN_COMMENTS
1125 if (warn_comment
&& found_comment
)
1126 as_warn_where (found_comment_file
, found_comment
,
1127 "first comment found here");
1132 /* Convert O_constant expression EXP into the equivalent O_big representation.
1133 Take the sign of the number from X_unsigned rather than X_add_number. */
1136 convert_to_bignum (expressionS
*exp
)
1141 value
= exp
->X_add_number
;
1142 for (i
= 0; i
< sizeof (exp
->X_add_number
) / CHARS_PER_LITTLENUM
; i
++)
1144 generic_bignum
[i
] = value
& LITTLENUM_MASK
;
1145 value
>>= LITTLENUM_NUMBER_OF_BITS
;
1147 /* Add a sequence of sign bits if the top bit of X_add_number is not
1148 the sign of the original value. */
1149 if ((exp
->X_add_number
< 0) != !exp
->X_unsigned
)
1150 generic_bignum
[i
++] = exp
->X_unsigned
? 0 : LITTLENUM_MASK
;
1152 exp
->X_add_number
= i
;
1155 /* For most MRI pseudo-ops, the line actually ends at the first
1156 nonquoted space. This function looks for that point, stuffs a null
1157 in, and sets *STOPCP to the character that used to be there, and
1158 returns the location.
1160 Until I hear otherwise, I am going to assume that this is only true
1161 for the m68k MRI assembler. */
1164 mri_comment_field (char *stopcp
)
1170 know (flag_m68k_mri
);
1172 for (s
= input_line_pointer
;
1173 ((!is_end_of_line
[(unsigned char) *s
] && *s
!= ' ' && *s
!= '\t')
1181 for (s
= input_line_pointer
;
1182 !is_end_of_line
[(unsigned char) *s
];
1192 /* Skip to the end of an MRI comment field. */
1195 mri_comment_end (char *stop
, int stopc
)
1199 input_line_pointer
= stop
;
1201 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1202 ++input_line_pointer
;
1206 s_abort (int ignore ATTRIBUTE_UNUSED
)
1208 as_fatal (_(".abort detected. Abandoning ship."));
1211 /* Guts of .align directive. N is the power of two to which to align.
1212 FILL may be NULL, or it may point to the bytes of the fill pattern.
1213 LEN is the length of whatever FILL points to, if anything. MAX is
1214 the maximum number of characters to skip when doing the alignment,
1215 or 0 if there is no maximum. */
1218 do_align (int n
, char *fill
, int len
, int max
)
1220 if (now_seg
== absolute_section
)
1224 if (*fill
++ != '\0')
1226 as_warn (_("ignoring fill value in absolute section"));
1233 #ifdef md_flush_pending_output
1234 md_flush_pending_output ();
1237 md_do_align (n
, fill
, len
, max
, just_record_alignment
);
1240 /* Only make a frag if we HAVE to... */
1241 if (n
!= 0 && !need_pass_2
)
1245 if (subseg_text_p (now_seg
))
1246 frag_align_code (n
, max
);
1248 frag_align (n
, 0, max
);
1251 frag_align (n
, *fill
, max
);
1253 frag_align_pattern (n
, fill
, len
, max
);
1257 just_record_alignment
: ATTRIBUTE_UNUSED_LABEL
1260 record_alignment (now_seg
, n
- OCTETS_PER_BYTE_POWER
);
1263 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1264 (in bytes). A negative ARG is the negative of the length of the
1265 fill pattern. BYTES_P is non-zero if the alignment value should be
1266 interpreted as the byte boundary, rather than the power of 2. */
1268 #ifdef BFD_ASSEMBLER
1269 #define ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1271 #define ALIGN_LIMIT 15
1275 s_align (int arg
, int bytes_p
)
1277 unsigned int align_limit
= ALIGN_LIMIT
;
1286 stop
= mri_comment_field (&stopc
);
1288 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1293 align
= arg
; /* Default value from pseudo-op table. */
1297 align
= get_absolute_expression ();
1303 /* Convert to a power of 2. */
1308 for (i
= 0; (align
& 1) == 0; align
>>= 1, ++i
)
1311 as_bad (_("alignment not a power of 2"));
1317 if (align
> align_limit
)
1319 align
= align_limit
;
1320 as_warn (_("alignment too large: %u assumed"), align
);
1323 if (*input_line_pointer
!= ',')
1330 ++input_line_pointer
;
1331 if (*input_line_pointer
== ',')
1335 fill
= get_absolute_expression ();
1340 if (*input_line_pointer
!= ',')
1344 ++input_line_pointer
;
1345 max
= get_absolute_expression ();
1352 as_warn (_("expected fill pattern missing"));
1353 do_align (align
, (char *) NULL
, 0, max
);
1368 do_align (align
, &fill_char
, fill_len
, max
);
1374 if ((size_t) fill_len
> sizeof ab
)
1376 md_number_to_chars (ab
, fill
, fill_len
);
1377 do_align (align
, ab
, fill_len
, max
);
1381 demand_empty_rest_of_line ();
1384 mri_comment_end (stop
, stopc
);
1387 /* Handle the .align pseudo-op on machines where ".align 4" means
1388 align to a 4 byte boundary. */
1391 s_align_bytes (int arg
)
1396 /* Handle the .align pseudo-op on machines where ".align 4" means align
1397 to a 2**4 boundary. */
1400 s_align_ptwo (int arg
)
1405 /* Switch in and out of alternate macro mode. */
1410 demand_empty_rest_of_line ();
1411 macro_set_alternate (on
);
1415 s_comm_internal (int param
,
1416 symbolS
*(*comm_parse_extra
) (int, symbolS
*, addressT
))
1422 symbolS
*symbolP
= NULL
;
1428 stop
= mri_comment_field (&stopc
);
1430 name
= input_line_pointer
;
1431 c
= get_symbol_end ();
1432 /* Just after name is now '\0'. */
1433 p
= input_line_pointer
;
1438 as_bad (_("expected symbol name"));
1439 ignore_rest_of_line ();
1445 /* Accept an optional comma after the name. The comma used to be
1446 required, but Irix 5 cc does not generate it for .lcomm. */
1447 if (*input_line_pointer
== ',')
1448 input_line_pointer
++;
1450 temp
= get_absolute_expr (&exp
);
1452 #ifdef BFD_ASSEMBLER
1453 size
&= ((offsetT
) 2 << (stdoutput
->arch_info
->bits_per_address
- 1)) - 1;
1455 if (exp
.X_op
== O_absent
)
1457 as_bad (_("missing size expression"));
1458 ignore_rest_of_line ();
1461 else if (temp
!= size
|| !exp
.X_unsigned
)
1463 as_warn (_("size (%ld) out of range, ignored"), (long) temp
);
1464 ignore_rest_of_line ();
1469 symbolP
= symbol_find_or_make (name
);
1470 if (S_IS_DEFINED (symbolP
) && !S_IS_COMMON (symbolP
))
1473 as_bad (_("symbol `%s' is already defined"), name
);
1475 ignore_rest_of_line ();
1479 size
= S_GET_VALUE (symbolP
);
1482 else if (size
!= temp
)
1483 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1484 name
, (long) size
, (long) temp
);
1487 if (comm_parse_extra
!= NULL
)
1488 symbolP
= (*comm_parse_extra
) (param
, symbolP
, size
);
1491 S_SET_VALUE (symbolP
, (valueT
) size
);
1492 S_SET_EXTERNAL (symbolP
);
1495 extern int flag_one
;
1496 if (size
== 0 || !flag_one
)
1497 S_GET_OTHER (symbolP
) = const_flag
;
1502 demand_empty_rest_of_line ();
1505 mri_comment_end (stop
, stopc
);
1512 s_comm_internal (ignore
, NULL
);
1515 /* The MRI COMMON pseudo-op. We handle this by creating a common
1516 symbol with the appropriate name. We make s_space do the right
1517 thing by increasing the size. */
1520 s_mri_common (int small ATTRIBUTE_UNUSED
)
1536 stop
= mri_comment_field (&stopc
);
1540 name
= input_line_pointer
;
1541 if (!ISDIGIT (*name
))
1542 c
= get_symbol_end ();
1547 ++input_line_pointer
;
1549 while (ISDIGIT (*input_line_pointer
));
1551 c
= *input_line_pointer
;
1552 *input_line_pointer
= '\0';
1554 if (line_label
!= NULL
)
1556 alc
= (char *) xmalloc (strlen (S_GET_NAME (line_label
))
1557 + (input_line_pointer
- name
)
1559 sprintf (alc
, "%s%s", name
, S_GET_NAME (line_label
));
1564 sym
= symbol_find_or_make (name
);
1565 *input_line_pointer
= c
;
1569 if (*input_line_pointer
!= ',')
1573 ++input_line_pointer
;
1574 align
= get_absolute_expression ();
1577 if (S_IS_DEFINED (sym
) && !S_IS_COMMON (sym
))
1579 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym
));
1580 ignore_rest_of_line ();
1581 mri_comment_end (stop
, stopc
);
1585 S_SET_EXTERNAL (sym
);
1586 mri_common_symbol
= sym
;
1590 S_SET_ALIGN (sym
, align
);
1593 if (line_label
!= NULL
)
1596 exp
.X_op
= O_symbol
;
1597 exp
.X_add_symbol
= sym
;
1598 exp
.X_add_number
= 0;
1599 symbol_set_value_expression (line_label
, &exp
);
1600 symbol_set_frag (line_label
, &zero_address_frag
);
1601 S_SET_SEGMENT (line_label
, expr_section
);
1604 /* FIXME: We just ignore the small argument, which distinguishes
1605 COMMON and COMMON.S. I don't know what we can do about it. */
1607 /* Ignore the type and hptype. */
1608 if (*input_line_pointer
== ',')
1609 input_line_pointer
+= 2;
1610 if (*input_line_pointer
== ',')
1611 input_line_pointer
+= 2;
1613 demand_empty_rest_of_line ();
1615 mri_comment_end (stop
, stopc
);
1619 s_data (int ignore ATTRIBUTE_UNUSED
)
1624 temp
= get_absolute_expression ();
1625 if (flag_readonly_data_in_text
)
1627 section
= text_section
;
1631 section
= data_section
;
1633 subseg_set (section
, (subsegT
) temp
);
1638 demand_empty_rest_of_line ();
1641 /* Handle the .appfile pseudo-op. This is automatically generated by
1642 do_scrub_chars when a preprocessor # line comment is seen with a
1643 file name. This default definition may be overridden by the object
1644 or CPU specific pseudo-ops. This function is also the default
1645 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1649 s_app_file_string (char *file
, int appfile ATTRIBUTE_UNUSED
)
1653 listing_source_file (file
);
1655 register_dependency (file
);
1657 obj_app_file (file
, appfile
);
1662 s_app_file (int appfile
)
1667 /* Some assemblers tolerate immediately following '"'. */
1668 if ((s
= demand_copy_string (&length
)) != 0)
1670 /* If this is a fake .appfile, a fake newline was inserted into
1671 the buffer. Passing -2 to new_logical_line tells it to
1674 = (!new_logical_line (s
, appfile
? -2 : -1) && appfile
);
1676 /* In MRI mode, the preprocessor may have inserted an extraneous
1679 && *input_line_pointer
== '\''
1680 && is_end_of_line
[(unsigned char) input_line_pointer
[1]])
1681 ++input_line_pointer
;
1683 demand_empty_rest_of_line ();
1685 s_app_file_string (s
, appfile
);
1689 /* Handle the .appline pseudo-op. This is automatically generated by
1690 do_scrub_chars when a preprocessor # line comment is seen. This
1691 default definition may be overridden by the object or CPU specific
1695 s_app_line (int ignore ATTRIBUTE_UNUSED
)
1699 /* The given number is that of the next line. */
1700 l
= get_absolute_expression () - 1;
1703 /* Some of the back ends can't deal with non-positive line numbers.
1704 Besides, it's silly. GCC however will generate a line number of
1705 zero when it is pre-processing builtins for assembler-with-cpp files:
1709 We do not want to barf on this, especially since such files are used
1710 in the GCC and GDB testsuites. So we check for negative line numbers
1711 rather than non-positive line numbers. */
1712 as_warn (_("line numbers must be positive; line number %d rejected"),
1716 new_logical_line ((char *) NULL
, l
);
1719 listing_source_line (l
);
1722 demand_empty_rest_of_line ();
1725 /* Handle the .end pseudo-op. Actually, the real work is done in
1726 read_a_source_file. */
1729 s_end (int ignore ATTRIBUTE_UNUSED
)
1733 /* The MRI assembler permits the start symbol to follow .end,
1734 but we don't support that. */
1736 if (!is_end_of_line
[(unsigned char) *input_line_pointer
]
1737 && *input_line_pointer
!= '*'
1738 && *input_line_pointer
!= '!')
1739 as_warn (_("start address not supported"));
1743 /* Handle the .err pseudo-op. */
1746 s_err (int ignore ATTRIBUTE_UNUSED
)
1748 as_bad (_(".err encountered"));
1749 demand_empty_rest_of_line ();
1752 /* Handle the .error and .warning pseudo-ops. */
1758 /* The purpose for the conditional assignment is not to
1759 internationalize the directive itself, but that we need a
1760 self-contained message, one that can be passed like the
1761 demand_copy_C_string return value, and with no assumption on the
1762 location of the name of the directive within the message. */
1764 = (err
? _(".error directive invoked in source file")
1765 : _(".warning directive invoked in source file"));
1767 if (!is_it_end_of_statement ())
1769 if (*input_line_pointer
!= '\"')
1771 as_bad (_("%s argument must be a string"),
1772 err
? ".error" : ".warning");
1773 ignore_rest_of_line ();
1777 msg
= demand_copy_C_string (&len
);
1785 as_warn ("%s", msg
);
1786 demand_empty_rest_of_line ();
1789 /* Handle the MRI fail pseudo-op. */
1792 s_fail (int ignore ATTRIBUTE_UNUSED
)
1799 stop
= mri_comment_field (&stopc
);
1801 temp
= get_absolute_expression ();
1803 as_warn (_(".fail %ld encountered"), (long) temp
);
1805 as_bad (_(".fail %ld encountered"), (long) temp
);
1807 demand_empty_rest_of_line ();
1810 mri_comment_end (stop
, stopc
);
1814 s_fill (int ignore ATTRIBUTE_UNUSED
)
1816 expressionS rep_exp
;
1818 register long fill
= 0;
1821 #ifdef md_flush_pending_output
1822 md_flush_pending_output ();
1825 get_known_segmented_expression (&rep_exp
);
1826 if (*input_line_pointer
== ',')
1828 input_line_pointer
++;
1829 size
= get_absolute_expression ();
1830 if (*input_line_pointer
== ',')
1832 input_line_pointer
++;
1833 fill
= get_absolute_expression ();
1837 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1838 #define BSD_FILL_SIZE_CROCK_8 (8)
1839 if (size
> BSD_FILL_SIZE_CROCK_8
)
1841 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8
);
1842 size
= BSD_FILL_SIZE_CROCK_8
;
1846 as_warn (_("size negative; .fill ignored"));
1849 else if (rep_exp
.X_op
== O_constant
&& rep_exp
.X_add_number
<= 0)
1851 if (rep_exp
.X_add_number
< 0)
1852 as_warn (_("repeat < 0; .fill ignored"));
1856 if (size
&& !need_pass_2
)
1858 if (rep_exp
.X_op
== O_constant
)
1860 p
= frag_var (rs_fill
, (int) size
, (int) size
,
1861 (relax_substateT
) 0, (symbolS
*) 0,
1862 (offsetT
) rep_exp
.X_add_number
,
1867 /* We don't have a constant repeat count, so we can't use
1868 rs_fill. We can get the same results out of rs_space,
1869 but its argument is in bytes, so we must multiply the
1870 repeat count by size. */
1873 rep_sym
= make_expr_symbol (&rep_exp
);
1876 expressionS size_exp
;
1877 size_exp
.X_op
= O_constant
;
1878 size_exp
.X_add_number
= size
;
1880 rep_exp
.X_op
= O_multiply
;
1881 rep_exp
.X_add_symbol
= rep_sym
;
1882 rep_exp
.X_op_symbol
= make_expr_symbol (&size_exp
);
1883 rep_exp
.X_add_number
= 0;
1884 rep_sym
= make_expr_symbol (&rep_exp
);
1887 p
= frag_var (rs_space
, (int) size
, (int) size
,
1888 (relax_substateT
) 0, rep_sym
, (offsetT
) 0, (char *) 0);
1891 memset (p
, 0, (unsigned int) size
);
1893 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1894 flavoured AS. The following bizarre behaviour is to be
1895 compatible with above. I guess they tried to take up to 8
1896 bytes from a 4-byte expression and they forgot to sign
1898 #define BSD_FILL_SIZE_CROCK_4 (4)
1899 md_number_to_chars (p
, (valueT
) fill
,
1900 (size
> BSD_FILL_SIZE_CROCK_4
1901 ? BSD_FILL_SIZE_CROCK_4
1903 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1904 but emits no error message because it seems a legal thing to do.
1905 It is a degenerate case of .fill but could be emitted by a
1908 demand_empty_rest_of_line ();
1912 s_globl (int ignore ATTRIBUTE_UNUSED
)
1921 stop
= mri_comment_field (&stopc
);
1925 name
= input_line_pointer
;
1926 c
= get_symbol_end ();
1927 symbolP
= symbol_find_or_make (name
);
1928 S_SET_EXTERNAL (symbolP
);
1930 *input_line_pointer
= c
;
1932 c
= *input_line_pointer
;
1935 input_line_pointer
++;
1937 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1943 demand_empty_rest_of_line ();
1946 mri_comment_end (stop
, stopc
);
1949 /* Handle the MRI IRP and IRPC pseudo-ops. */
1960 as_where (&file
, &line
);
1963 eol
= find_end_of_line (input_line_pointer
, 0);
1964 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
1965 input_line_pointer
= eol
;
1969 err
= expand_irp (irpc
, 0, &s
, &out
, get_line_sb
);
1971 as_bad_where (file
, line
, "%s", err
);
1975 input_scrub_include_sb (&out
, input_line_pointer
, 1);
1977 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1980 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
1981 the section to only be linked once. However, this is not supported
1982 by most object file formats. This takes an optional argument,
1983 which is what to do about duplicates. */
1986 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
1988 enum linkonce_type type
;
1992 type
= LINKONCE_DISCARD
;
1994 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1999 s
= input_line_pointer
;
2000 c
= get_symbol_end ();
2001 if (strcasecmp (s
, "discard") == 0)
2002 type
= LINKONCE_DISCARD
;
2003 else if (strcasecmp (s
, "one_only") == 0)
2004 type
= LINKONCE_ONE_ONLY
;
2005 else if (strcasecmp (s
, "same_size") == 0)
2006 type
= LINKONCE_SAME_SIZE
;
2007 else if (strcasecmp (s
, "same_contents") == 0)
2008 type
= LINKONCE_SAME_CONTENTS
;
2010 as_warn (_("unrecognized .linkonce type `%s'"), s
);
2012 *input_line_pointer
= c
;
2015 #ifdef obj_handle_link_once
2016 obj_handle_link_once (type
);
2017 #else /* ! defined (obj_handle_link_once) */
2018 #ifdef BFD_ASSEMBLER
2022 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
2023 as_warn (_(".linkonce is not supported for this object file format"));
2025 flags
= bfd_get_section_flags (stdoutput
, now_seg
);
2026 flags
|= SEC_LINK_ONCE
;
2031 case LINKONCE_DISCARD
:
2032 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
2034 case LINKONCE_ONE_ONLY
:
2035 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
2037 case LINKONCE_SAME_SIZE
:
2038 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
2040 case LINKONCE_SAME_CONTENTS
:
2041 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
2044 if (!bfd_set_section_flags (stdoutput
, now_seg
, flags
))
2045 as_bad (_("bfd_set_section_flags: %s"),
2046 bfd_errmsg (bfd_get_error ()));
2048 #else /* ! defined (BFD_ASSEMBLER) */
2049 as_warn (_(".linkonce is not supported for this object file format"));
2050 #endif /* ! defined (BFD_ASSEMBLER) */
2051 #endif /* ! defined (obj_handle_link_once) */
2053 demand_empty_rest_of_line ();
2057 bss_alloc (symbolS
*symbolP
, addressT size
, int align
)
2060 segT current_seg
= now_seg
;
2061 subsegT current_subseg
= now_subseg
;
2062 segT bss_seg
= bss_section
;
2064 #if defined (TC_MIPS) || defined (TC_ALPHA)
2065 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
2066 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
2068 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2069 if (size
<= bfd_get_gp_size (stdoutput
))
2071 bss_seg
= subseg_new (".sbss", 1);
2072 seg_info (bss_seg
)->bss
= 1;
2073 #ifdef BFD_ASSEMBLER
2074 if (!bfd_set_section_flags (stdoutput
, bss_seg
, SEC_ALLOC
))
2075 as_warn (_("error setting flags for \".sbss\": %s"),
2076 bfd_errmsg (bfd_get_error ()));
2081 subseg_set (bss_seg
, 1);
2085 record_alignment (bss_seg
, align
);
2086 frag_align (align
, 0, 0);
2089 /* Detach from old frag. */
2090 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2091 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2093 symbol_set_frag (symbolP
, frag_now
);
2094 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
, NULL
);
2098 S_SET_SIZE (symbolP
, size
);
2100 S_SET_SEGMENT (symbolP
, bss_seg
);
2103 /* The symbol may already have been created with a preceding
2104 ".globl" directive -- be careful not to step on storage class
2105 in that case. Otherwise, set it to static. */
2106 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2107 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2108 #endif /* OBJ_COFF */
2110 subseg_set (current_seg
, current_subseg
);
2114 parse_align (int align_bytes
)
2120 if (*input_line_pointer
!= ',')
2123 as_bad (_("expected alignment after size"));
2124 ignore_rest_of_line ();
2128 input_line_pointer
++;
2131 align
= get_absolute_expr (&exp
);
2132 if (exp
.X_op
== O_absent
)
2135 if (!exp
.X_unsigned
)
2137 as_warn (_("alignment negative; 0 assumed"));
2141 if (align_bytes
&& align
!= 0)
2143 /* convert to a power of 2 alignment */
2144 unsigned int alignp2
= 0;
2145 while ((align
& 1) == 0)
2146 align
>>= 1, ++alignp2
;
2149 as_bad (_("alignment not a power of 2"));
2150 ignore_rest_of_line ();
2158 /* Called from s_comm_internal after symbol name and size have been
2159 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2160 1 if this was a ".bss" directive which has a 3rd argument
2161 (alignment as a power of 2), or 2 if this was a ".bss" directive
2162 with alignment in bytes. */
2165 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2171 align
= parse_align (needs_align
- 1);
2172 if (align
== (addressT
) -1)
2176 /* Assume some objects may require alignment on some systems. */
2177 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2179 bss_alloc (symbolP
, size
, align
);
2184 s_lcomm (int needs_align
)
2186 s_comm_internal (needs_align
, s_lcomm_internal
);
2190 s_lcomm_bytes (int needs_align
)
2192 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2196 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2198 register char *name
;
2202 register symbolS
*symbolP
;
2204 /* We permit ANY defined expression: BSD4.2 demands constants. */
2205 name
= input_line_pointer
;
2206 c
= get_symbol_end ();
2207 p
= input_line_pointer
;
2212 as_bad (_("expected symbol name"));
2213 ignore_rest_of_line ();
2219 if (*input_line_pointer
!= ',')
2222 as_bad (_("expected comma after \"%s\""), name
);
2224 ignore_rest_of_line ();
2228 input_line_pointer
++;
2231 if (exp
.X_op
!= O_constant
2232 && exp
.X_op
!= O_register
)
2234 as_bad (_("bad expression"));
2235 ignore_rest_of_line ();
2240 symbolP
= symbol_find_or_make (name
);
2242 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
2243 symbolP->sy_desc == 0) out of this test because coff doesn't have
2244 those fields, and I can't see when they'd ever be tripped. I
2245 don't think I understand why they were here so I may have
2246 introduced a bug. As recently as 1.37 didn't have this test
2247 anyway. xoxorich. */
2249 if (S_GET_SEGMENT (symbolP
) == undefined_section
2250 && S_GET_VALUE (symbolP
) == 0)
2252 /* The name might be an undefined .global symbol; be sure to
2253 keep the "external" bit. */
2254 S_SET_SEGMENT (symbolP
,
2255 (exp
.X_op
== O_constant
2258 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2262 as_bad (_("symbol `%s' is already defined"), name
);
2266 demand_empty_rest_of_line ();
2269 /* Read a line into an sb. Returns the character that ended the line
2270 or zero if there are no more lines. */
2273 get_line_sb (sb
*line
)
2277 if (input_line_pointer
[-1] == '\n')
2278 bump_line_counters ();
2280 if (input_line_pointer
>= buffer_limit
)
2282 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2283 if (buffer_limit
== 0)
2287 eol
= find_end_of_line (input_line_pointer
, flag_m68k_mri
);
2288 sb_add_buffer (line
, input_line_pointer
, eol
- input_line_pointer
);
2289 input_line_pointer
= eol
;
2291 /* Don't skip multiple end-of-line characters, because that breaks support
2292 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2293 characters but isn't. Instead just skip one end of line character and
2294 return the character skipped so that the caller can re-insert it if
2296 return *input_line_pointer
++;
2299 /* Define a macro. This is an interface to macro.c. */
2302 s_macro (int ignore ATTRIBUTE_UNUSED
)
2310 as_where (&file
, &line
);
2313 eol
= find_end_of_line (input_line_pointer
, 0);
2314 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2315 input_line_pointer
= eol
;
2317 if (line_label
!= NULL
)
2322 sb_add_string (&label
, S_GET_NAME (line_label
));
2323 err
= define_macro (0, &s
, &label
, get_line_sb
, file
, line
, &name
);
2327 err
= define_macro (0, &s
, NULL
, get_line_sb
, file
, line
, &name
);
2329 as_bad_where (file
, line
, err
, name
);
2332 if (line_label
!= NULL
)
2334 S_SET_SEGMENT (line_label
, absolute_section
);
2335 S_SET_VALUE (line_label
, 0);
2336 symbol_set_frag (line_label
, &zero_address_frag
);
2339 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2340 && hash_find (po_hash
, name
) != NULL
)
2343 && hash_find (po_hash
, name
+ 1) != NULL
))
2344 as_warn_where (file
,
2346 _("attempt to redefine pseudo-op `%s' ignored"),
2353 /* Handle the .mexit pseudo-op, which immediately exits a macro
2357 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2359 cond_exit_macro (macro_nest
);
2360 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2363 /* Switch in and out of MRI mode. */
2366 s_mri (int ignore ATTRIBUTE_UNUSED
)
2370 on
= get_absolute_expression ();
2371 old_flag
= flag_mri
;
2389 /* Operator precedence changes in m68k MRI mode, so we need to
2390 update the operator rankings. */
2391 expr_set_precedence ();
2393 #ifdef MRI_MODE_CHANGE
2395 MRI_MODE_CHANGE (on
);
2398 demand_empty_rest_of_line ();
2401 /* Handle changing the location counter. */
2404 do_org (segT segment
, expressionS
*exp
, int fill
)
2406 if (segment
!= now_seg
&& segment
!= absolute_section
)
2407 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2409 if (now_seg
== absolute_section
)
2412 as_warn (_("ignoring fill value in absolute section"));
2413 if (exp
->X_op
!= O_constant
)
2415 as_bad (_("only constant offsets supported in absolute section"));
2416 exp
->X_add_number
= 0;
2418 abs_section_offset
= exp
->X_add_number
;
2423 symbolS
*sym
= exp
->X_add_symbol
;
2424 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2426 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2428 /* Handle complex expressions. */
2429 sym
= make_expr_symbol (exp
);
2433 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2439 s_org (int ignore ATTRIBUTE_UNUSED
)
2441 register segT segment
;
2443 register long temp_fill
;
2445 #ifdef md_flush_pending_output
2446 md_flush_pending_output ();
2449 /* The m68k MRI assembler has a different meaning for .org. It
2450 means to create an absolute section at a given address. We can't
2451 support that--use a linker script instead. */
2454 as_bad (_("MRI style ORG pseudo-op not supported"));
2455 ignore_rest_of_line ();
2459 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2460 thing as a sub-segment-relative origin. Any absolute origin is
2461 given a warning, then assumed to be segment-relative. Any
2462 segmented origin expression ("foo+42") had better be in the right
2463 segment or the .org is ignored.
2465 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2466 we never know sub-segment sizes when we are reading code. BSD
2467 will crash trying to emit negative numbers of filler bytes in
2468 certain .orgs. We don't crash, but see as-write for that code.
2470 Don't make frag if need_pass_2==1. */
2471 segment
= get_known_segmented_expression (&exp
);
2472 if (*input_line_pointer
== ',')
2474 input_line_pointer
++;
2475 temp_fill
= get_absolute_expression ();
2481 do_org (segment
, &exp
, temp_fill
);
2483 demand_empty_rest_of_line ();
2486 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2487 called by the obj-format routine which handles section changing
2488 when in MRI mode. It will create a new section, and return it. It
2489 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2490 'M' (mixed), or 'R' (romable). If BFD_ASSEMBLER is defined, the
2491 flags will be set in the section. */
2494 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2504 name
= input_line_pointer
;
2505 if (!ISDIGIT (*name
))
2506 c
= get_symbol_end ();
2511 ++input_line_pointer
;
2513 while (ISDIGIT (*input_line_pointer
));
2515 c
= *input_line_pointer
;
2516 *input_line_pointer
= '\0';
2519 name
= xstrdup (name
);
2521 *input_line_pointer
= c
;
2523 seg
= subseg_new (name
, 0);
2525 if (*input_line_pointer
== ',')
2529 ++input_line_pointer
;
2530 align
= get_absolute_expression ();
2531 record_alignment (seg
, align
);
2535 if (*input_line_pointer
== ',')
2537 c
= *++input_line_pointer
;
2539 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
2542 as_bad (_("unrecognized section type"));
2543 ++input_line_pointer
;
2545 #ifdef BFD_ASSEMBLER
2549 flags
= SEC_NO_FLAGS
;
2551 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
2552 else if (*type
== 'D' || *type
== 'M')
2553 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
2554 else if (*type
== 'R')
2555 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
2556 if (flags
!= SEC_NO_FLAGS
)
2558 if (!bfd_set_section_flags (stdoutput
, seg
, flags
))
2559 as_warn (_("error setting flags for \"%s\": %s"),
2560 bfd_section_name (stdoutput
, seg
),
2561 bfd_errmsg (bfd_get_error ()));
2567 /* Ignore the HP type. */
2568 if (*input_line_pointer
== ',')
2569 input_line_pointer
+= 2;
2571 demand_empty_rest_of_line ();
2573 #else /* ! TC_M68K */
2582 name
= input_line_pointer
;
2583 c
= get_symbol_end ();
2585 name
= xstrdup (name
);
2587 *input_line_pointer
= c
;
2589 seg
= subseg_new (name
, 0);
2591 if (*input_line_pointer
!= ',')
2597 ++input_line_pointer
;
2599 sectype
= input_line_pointer
;
2600 c
= get_symbol_end ();
2601 if (*sectype
== '\0')
2603 else if (strcasecmp (sectype
, "text") == 0)
2605 else if (strcasecmp (sectype
, "data") == 0)
2607 else if (strcasecmp (sectype
, "romdata") == 0)
2610 as_warn (_("unrecognized section type `%s'"), sectype
);
2611 *input_line_pointer
= c
;
2614 if (*input_line_pointer
== ',')
2618 ++input_line_pointer
;
2620 seccmd
= input_line_pointer
;
2621 c
= get_symbol_end ();
2622 if (strcasecmp (seccmd
, "absolute") == 0)
2624 as_bad (_("absolute sections are not supported"));
2625 *input_line_pointer
= c
;
2626 ignore_rest_of_line ();
2629 else if (strcasecmp (seccmd
, "align") == 0)
2633 *input_line_pointer
= c
;
2634 align
= get_absolute_expression ();
2635 record_alignment (seg
, align
);
2639 as_warn (_("unrecognized section command `%s'"), seccmd
);
2640 *input_line_pointer
= c
;
2644 demand_empty_rest_of_line ();
2646 #else /* ! TC_I960 */
2647 /* The MRI assembler seems to use different forms of .sect for
2648 different targets. */
2649 as_bad ("MRI mode not supported for this target");
2650 ignore_rest_of_line ();
2651 #endif /* ! TC_I960 */
2652 #endif /* ! TC_M68K */
2655 /* Handle the .print pseudo-op. */
2658 s_print (int ignore ATTRIBUTE_UNUSED
)
2663 s
= demand_copy_C_string (&len
);
2666 demand_empty_rest_of_line ();
2669 /* Handle the .purgem pseudo-op. */
2672 s_purgem (int ignore ATTRIBUTE_UNUSED
)
2674 if (is_it_end_of_statement ())
2676 demand_empty_rest_of_line ();
2686 name
= input_line_pointer
;
2687 c
= get_symbol_end ();
2688 delete_macro (name
);
2689 *input_line_pointer
= c
;
2692 while (*input_line_pointer
++ == ',');
2694 --input_line_pointer
;
2695 demand_empty_rest_of_line ();
2698 /* Handle the .endm/.endr pseudo-ops. */
2701 s_bad_end (int endr
)
2703 as_warn (_(".end%c encountered without preceeding %s"),
2705 endr
? ".rept, .irp, or .irpc" : ".macro");
2706 demand_empty_rest_of_line ();
2709 /* Handle the .rept pseudo-op. */
2712 s_rept (int ignore ATTRIBUTE_UNUSED
)
2716 count
= get_absolute_expression ();
2718 do_repeat (count
, "REPT", "ENDR");
2721 /* This function provides a generic repeat block implementation. It allows
2722 different directives to be used as the start/end keys. */
2725 do_repeat (int count
, const char *start
, const char *end
)
2731 if (!buffer_and_nest (start
, end
, &one
, get_line_sb
))
2733 as_bad (_("%s without %s"), start
, end
);
2739 sb_add_sb (&many
, &one
);
2743 input_scrub_include_sb (&many
, input_line_pointer
, 1);
2745 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2748 /* Skip to end of current repeat loop; EXTRA indicates how many additional
2749 input buffers to skip. Assumes that conditionals preceding the loop end
2750 are properly nested.
2752 This function makes it easier to implement a premature "break" out of the
2753 loop. The EXTRA arg accounts for other buffers we might have inserted,
2754 such as line substitutions. */
2757 end_repeat (int extra
)
2759 cond_exit_macro (macro_nest
);
2760 while (extra
-- >= 0)
2761 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2765 assign_symbol (char *name
, int no_reassign
)
2769 if (name
[0] == '.' && name
[1] == '\0')
2771 /* Turn '. = mumble' into a .org mumble. */
2775 segment
= get_known_segmented_expression (&exp
);
2778 do_org (segment
, &exp
, 0);
2783 if ((symbolP
= symbol_find (name
)) == NULL
2784 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
2786 symbolP
= symbol_find_or_make (name
);
2788 /* When doing symbol listings, play games with dummy fragments living
2789 outside the normal fragment chain to record the file and line info
2791 if (listing
& LISTING_SYMBOLS
)
2793 extern struct list_info_struct
*listing_tail
;
2794 fragS
*dummy_frag
= (fragS
*) xcalloc (1, sizeof (fragS
));
2795 dummy_frag
->line
= listing_tail
;
2796 dummy_frag
->fr_symbol
= symbolP
;
2797 symbol_set_frag (symbolP
, dummy_frag
);
2801 /* "set" symbols are local unless otherwise specified. */
2802 SF_SET_LOCAL (symbolP
);
2806 /* Permit register names to be redefined. */
2808 && S_IS_DEFINED (symbolP
)
2809 && S_GET_SEGMENT (symbolP
) != reg_section
)
2810 as_bad (_("symbol `%s' is already defined"), name
);
2812 pseudo_set (symbolP
);
2815 /* Handle the .equ, .equiv and .set directives. If EQUIV is 1, then
2816 this is .equiv, and it is an error if the symbol is already
2826 /* Especial apologies for the random logic:
2827 this just grew, and could be parsed much more simply!
2829 name
= input_line_pointer
;
2830 delim
= get_symbol_end ();
2831 end_name
= input_line_pointer
;
2834 if (name
== end_name
)
2836 as_bad (_("expected symbol name"));
2837 ignore_rest_of_line ();
2843 if (*input_line_pointer
!= ',')
2846 as_bad (_("expected comma after \"%s\""), name
);
2848 ignore_rest_of_line ();
2852 input_line_pointer
++;
2855 assign_symbol (name
, equiv
);
2858 demand_empty_rest_of_line ();
2871 #ifdef md_flush_pending_output
2872 md_flush_pending_output ();
2876 stop
= mri_comment_field (&stopc
);
2878 /* In m68k MRI mode, we need to align to a word boundary, unless
2880 if (flag_m68k_mri
&& mult
> 1)
2882 if (now_seg
== absolute_section
)
2884 abs_section_offset
+= abs_section_offset
& 1;
2885 if (line_label
!= NULL
)
2886 S_SET_VALUE (line_label
, abs_section_offset
);
2888 else if (mri_common_symbol
!= NULL
)
2892 val
= S_GET_VALUE (mri_common_symbol
);
2895 S_SET_VALUE (mri_common_symbol
, val
+ 1);
2896 if (line_label
!= NULL
)
2898 expressionS
*symexp
;
2900 symexp
= symbol_get_value_expression (line_label
);
2901 know (symexp
->X_op
== O_symbol
);
2902 know (symexp
->X_add_symbol
== mri_common_symbol
);
2903 symexp
->X_add_number
+= 1;
2909 do_align (1, (char *) NULL
, 0, 0);
2910 if (line_label
!= NULL
)
2912 symbol_set_frag (line_label
, frag_now
);
2913 S_SET_VALUE (line_label
, frag_now_fix ());
2923 if (*input_line_pointer
== ',')
2925 ++input_line_pointer
;
2930 val
.X_op
= O_constant
;
2931 val
.X_add_number
= 0;
2934 if (val
.X_op
!= O_constant
2935 || val
.X_add_number
< - 0x80
2936 || val
.X_add_number
> 0xff
2937 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
2939 if (exp
.X_op
!= O_constant
)
2940 as_bad (_("unsupported variable size or fill value"));
2947 bytes
= mult
* exp
.X_add_number
;
2948 for (i
= 0; i
< exp
.X_add_number
; i
++)
2949 emit_expr (&val
, mult
);
2954 if (exp
.X_op
== O_constant
)
2958 repeat
= exp
.X_add_number
;
2965 as_warn (_(".space repeat count is zero, ignored"));
2966 else if (repeat
< 0)
2967 as_warn (_(".space repeat count is negative, ignored"));
2971 /* If we are in the absolute section, just bump the offset. */
2972 if (now_seg
== absolute_section
)
2974 abs_section_offset
+= repeat
;
2978 /* If we are secretly in an MRI common section, then
2979 creating space just increases the size of the common
2981 if (mri_common_symbol
!= NULL
)
2983 S_SET_VALUE (mri_common_symbol
,
2984 S_GET_VALUE (mri_common_symbol
) + repeat
);
2989 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
2990 (offsetT
) repeat
, (char *) 0);
2994 if (now_seg
== absolute_section
)
2996 as_bad (_("space allocation too complex in absolute section"));
2997 subseg_set (text_section
, 0);
3000 if (mri_common_symbol
!= NULL
)
3002 as_bad (_("space allocation too complex in common section"));
3003 mri_common_symbol
= NULL
;
3007 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
3008 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
3012 *p
= val
.X_add_number
;
3017 /* In MRI mode, after an odd number of bytes, we must align to an
3018 even word boundary, unless the next instruction is a dc.b, ds.b
3020 if (flag_mri
&& (bytes
& 1) != 0)
3021 mri_pending_align
= 1;
3023 demand_empty_rest_of_line ();
3026 mri_comment_end (stop
, stopc
);
3029 /* This is like s_space, but the value is a floating point number with
3030 the given precision. This is for the MRI dcb.s pseudo-op and
3034 s_float_space (int float_type
)
3038 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
3043 stop
= mri_comment_field (&stopc
);
3045 count
= get_absolute_expression ();
3048 if (*input_line_pointer
!= ',')
3050 as_bad (_("missing value"));
3051 ignore_rest_of_line ();
3053 mri_comment_end (stop
, stopc
);
3057 ++input_line_pointer
;
3061 /* Skip any 0{letter} that may be present. Don't even check if the
3062 * letter is legal. */
3063 if (input_line_pointer
[0] == '0'
3064 && ISALPHA (input_line_pointer
[1]))
3065 input_line_pointer
+= 2;
3067 /* Accept :xxxx, where the x's are hex digits, for a floating point
3068 with the exact digits specified. */
3069 if (input_line_pointer
[0] == ':')
3071 flen
= hex_float (float_type
, temp
);
3074 ignore_rest_of_line ();
3076 mri_comment_end (stop
, stopc
);
3084 err
= md_atof (float_type
, temp
, &flen
);
3085 know (flen
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3089 as_bad (_("bad floating literal: %s"), err
);
3090 ignore_rest_of_line ();
3092 mri_comment_end (stop
, stopc
);
3097 while (--count
>= 0)
3101 p
= frag_more (flen
);
3102 memcpy (p
, temp
, (unsigned int) flen
);
3105 demand_empty_rest_of_line ();
3108 mri_comment_end (stop
, stopc
);
3111 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3114 s_struct (int ignore ATTRIBUTE_UNUSED
)
3120 stop
= mri_comment_field (&stopc
);
3121 abs_section_offset
= get_absolute_expression ();
3122 subseg_set (absolute_section
, 0);
3123 demand_empty_rest_of_line ();
3125 mri_comment_end (stop
, stopc
);
3129 s_text (int ignore ATTRIBUTE_UNUSED
)
3133 temp
= get_absolute_expression ();
3134 subseg_set (text_section
, (subsegT
) temp
);
3135 demand_empty_rest_of_line ();
3137 const_flag
&= ~IN_DEFAULT_SECTION
;
3142 /* Verify that we are at the end of a line. If not, issue an error and
3146 demand_empty_rest_of_line (void)
3149 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3150 input_line_pointer
++;
3153 if (ISPRINT (*input_line_pointer
))
3154 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3155 *input_line_pointer
);
3157 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3158 *input_line_pointer
);
3159 ignore_rest_of_line ();
3162 /* Return pointing just after end-of-line. */
3163 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3166 /* Silently advance to the end of line. Use this after already having
3167 issued an error about something bad. */
3170 ignore_rest_of_line (void)
3172 while (input_line_pointer
< buffer_limit
3173 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3174 input_line_pointer
++;
3176 input_line_pointer
++;
3178 /* Return pointing just after end-of-line. */
3179 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3182 /* Sets frag for given symbol to zero_address_frag, except when the
3183 symbol frag is already set to a dummy listing frag. */
3186 set_zero_frag (symbolS
*symbolP
)
3188 if (symbol_get_frag (symbolP
)->fr_type
!= rs_dummy
)
3189 symbol_set_frag (symbolP
, &zero_address_frag
);
3192 /* In: Pointer to a symbol.
3193 Input_line_pointer->expression.
3195 Out: Input_line_pointer->just after any whitespace after expression.
3196 Tried to set symbol to value of expression.
3197 Will change symbols type, value, and frag; */
3200 pseudo_set (symbolS
*symbolP
)
3204 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3206 #endif /* OBJ_AOUT or OBJ_BOUT */
3208 know (symbolP
); /* NULL pointer is logic error. */
3210 (void) expression (&exp
);
3212 if (exp
.X_op
== O_illegal
)
3213 as_bad (_("illegal expression"));
3214 else if (exp
.X_op
== O_absent
)
3215 as_bad (_("missing expression"));
3216 else if (exp
.X_op
== O_big
)
3218 if (exp
.X_add_number
> 0)
3219 as_bad (_("bignum invalid"));
3221 as_bad (_("floating point number invalid"));
3223 else if (exp
.X_op
== O_subtract
3224 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
3225 && (symbol_get_frag (exp
.X_add_symbol
)
3226 == symbol_get_frag (exp
.X_op_symbol
)))
3228 exp
.X_op
= O_constant
;
3229 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
3230 - S_GET_VALUE (exp
.X_op_symbol
));
3233 if (symbol_section_p (symbolP
))
3235 as_bad ("attempt to set value of section symbol");
3238 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3239 ext
= S_IS_EXTERNAL (symbolP
);
3240 #endif /* OBJ_AOUT or OBJ_BOUT */
3247 exp
.X_add_number
= 0;
3250 S_SET_SEGMENT (symbolP
, absolute_section
);
3251 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3252 set_zero_frag (symbolP
);
3256 S_SET_SEGMENT (symbolP
, reg_section
);
3257 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3258 set_zero_frag (symbolP
);
3262 seg
= S_GET_SEGMENT (exp
.X_add_symbol
);
3263 /* For x=undef+const, create an expression symbol.
3264 For x=x+const, just update x except when x is an undefined symbol
3265 For x=defined+const, evaluate x. */
3266 if (symbolP
== exp
.X_add_symbol
3267 && (seg
!= undefined_section
3268 || !symbol_constant_p (symbolP
)))
3270 *symbol_X_add_number (symbolP
) += exp
.X_add_number
;
3273 else if (seg
!= undefined_section
)
3275 symbolS
*s
= exp
.X_add_symbol
;
3277 if (S_IS_COMMON (s
))
3278 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3279 S_GET_NAME (symbolP
), S_GET_NAME (s
));
3281 S_SET_SEGMENT (symbolP
, seg
);
3282 S_SET_VALUE (symbolP
, exp
.X_add_number
+ S_GET_VALUE (s
));
3283 symbol_set_frag (symbolP
, symbol_get_frag (s
));
3284 copy_symbol_attributes (symbolP
, s
);
3290 /* The value is some complex expression.
3291 Set segment and frag back to that of a newly created symbol. */
3292 S_SET_SEGMENT (symbolP
, undefined_section
);
3293 symbol_set_value_expression (symbolP
, &exp
);
3294 set_zero_frag (symbolP
);
3298 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3300 S_SET_EXTERNAL (symbolP
);
3302 S_CLEAR_EXTERNAL (symbolP
);
3303 #endif /* OBJ_AOUT or OBJ_BOUT */
3308 CONStruct more frag of .bytes, or .words etc.
3309 Should need_pass_2 be 1 then emit no frag(s).
3310 This understands EXPRESSIONS.
3314 This has a split personality. We use expression() to read the
3315 value. We can detect if the value won't fit in a byte or word.
3316 But we can't detect if expression() discarded significant digits
3317 in the case of a long. Not worth the crocks required to fix it. */
3319 /* Select a parser for cons expressions. */
3321 /* Some targets need to parse the expression in various fancy ways.
3322 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3323 (for example, the HPPA does this). Otherwise, you can define
3324 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3325 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3326 are defined, which is the normal case, then only simple expressions
3331 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
3334 #ifndef TC_PARSE_CONS_EXPRESSION
3335 #ifdef BITFIELD_CONS_EXPRESSIONS
3336 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3338 parse_bitfield_cons (expressionS
*exp
, unsigned int nbytes
);
3340 #ifdef REPEAT_CONS_EXPRESSIONS
3341 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3343 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
3346 /* If we haven't gotten one yet, just call expression. */
3347 #ifndef TC_PARSE_CONS_EXPRESSION
3348 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3353 do_parse_cons_expression (expressionS
*exp
,
3354 int nbytes ATTRIBUTE_UNUSED
)
3356 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3360 /* Worker to do .byte etc statements.
3361 Clobbers input_line_pointer and checks end-of-line. */
3364 cons_worker (register int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
3372 #ifdef md_flush_pending_output
3373 md_flush_pending_output ();
3377 stop
= mri_comment_field (&stopc
);
3379 if (is_it_end_of_statement ())
3381 demand_empty_rest_of_line ();
3383 mri_comment_end (stop
, stopc
);
3387 #ifdef TC_ADDRESS_BYTES
3389 nbytes
= TC_ADDRESS_BYTES ();
3392 #ifdef md_cons_align
3393 md_cons_align (nbytes
);
3401 parse_mri_cons (&exp
, (unsigned int) nbytes
);
3404 TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
3408 if (exp
.X_op
== O_symbol
)
3409 exp
.X_op
= O_symbol_rva
;
3411 as_fatal (_("rva without symbol"));
3413 emit_expr (&exp
, (unsigned int) nbytes
);
3416 while (*input_line_pointer
++ == ',');
3418 /* In MRI mode, after an odd number of bytes, we must align to an
3419 even word boundary, unless the next instruction is a dc.b, ds.b
3421 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
3422 mri_pending_align
= 1;
3424 input_line_pointer
--; /* Put terminator back into stream. */
3426 demand_empty_rest_of_line ();
3429 mri_comment_end (stop
, stopc
);
3435 cons_worker (size
, 0);
3441 cons_worker (size
, 1);
3444 /* Put the contents of expression EXP into the object file using
3445 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3448 emit_expr (expressionS
*exp
, unsigned int nbytes
)
3452 valueT extra_digit
= 0;
3454 /* Don't do anything if we are going to make another pass. */
3458 dot_value
= frag_now_fix ();
3462 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3463 appear as a four byte positive constant in the .line section,
3464 followed by a 2 byte 0xffff. Look for that case here. */
3466 static int dwarf_line
= -1;
3468 if (strcmp (segment_name (now_seg
), ".line") != 0)
3470 else if (dwarf_line
>= 0
3472 && exp
->X_op
== O_constant
3473 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
3474 listing_source_line ((unsigned int) dwarf_line
);
3475 else if (nbytes
== 4
3476 && exp
->X_op
== O_constant
3477 && exp
->X_add_number
>= 0)
3478 dwarf_line
= exp
->X_add_number
;
3483 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3484 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3485 AT_sibling (0x12) followed by a four byte address of the sibling
3486 followed by a 2 byte AT_name (0x38) followed by the name of the
3487 file. We look for that case here. */
3489 static int dwarf_file
= 0;
3491 if (strcmp (segment_name (now_seg
), ".debug") != 0)
3493 else if (dwarf_file
== 0
3495 && exp
->X_op
== O_constant
3496 && exp
->X_add_number
== 0x11)
3498 else if (dwarf_file
== 1
3500 && exp
->X_op
== O_constant
3501 && exp
->X_add_number
== 0x12)
3503 else if (dwarf_file
== 2
3506 else if (dwarf_file
== 3
3508 && exp
->X_op
== O_constant
3509 && exp
->X_add_number
== 0x38)
3514 /* The variable dwarf_file_string tells stringer that the string
3515 may be the name of the source file. */
3516 if (dwarf_file
== 4)
3517 dwarf_file_string
= 1;
3519 dwarf_file_string
= 0;
3524 if (check_eh_frame (exp
, &nbytes
))
3529 /* Allow `.word 0' in the absolute section. */
3530 if (now_seg
== absolute_section
)
3532 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
3533 as_bad (_("attempt to store value in absolute section"));
3534 abs_section_offset
+= nbytes
;
3538 /* Handle a negative bignum. */
3540 && exp
->X_add_number
== 0
3541 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
3542 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
3545 unsigned long carry
;
3547 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
3549 /* Negate the bignum: one's complement each digit and add 1. */
3551 for (i
= 0; i
< exp
->X_add_number
; i
++)
3555 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
3558 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
3559 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
3562 /* We can ignore any carry out, because it will be handled by
3563 extra_digit if it is needed. */
3565 extra_digit
= (valueT
) -1;
3569 if (op
== O_absent
|| op
== O_illegal
)
3571 as_warn (_("zero assumed for missing expression"));
3572 exp
->X_add_number
= 0;
3575 else if (op
== O_big
&& exp
->X_add_number
<= 0)
3577 as_bad (_("floating point number invalid"));
3578 exp
->X_add_number
= 0;
3581 else if (op
== O_register
)
3583 as_warn (_("register value used as expression"));
3587 p
= frag_more ((int) nbytes
);
3589 #ifndef WORKING_DOT_WORD
3590 /* If we have the difference of two symbols in a word, save it on
3591 the broken_words list. See the code in write.c. */
3592 if (op
== O_subtract
&& nbytes
== 2)
3594 struct broken_word
*x
;
3596 x
= (struct broken_word
*) xmalloc (sizeof (struct broken_word
));
3597 x
->next_broken_word
= broken_words
;
3600 x
->subseg
= now_subseg
;
3602 x
->word_goes_here
= p
;
3604 x
->add
= exp
->X_add_symbol
;
3605 x
->sub
= exp
->X_op_symbol
;
3606 x
->addnum
= exp
->X_add_number
;
3614 /* If we have an integer, but the number of bytes is too large to
3615 pass to md_number_to_chars, handle it as a bignum. */
3616 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
3618 extra_digit
= exp
->X_unsigned
? 0 : -1;
3619 convert_to_bignum (exp
);
3623 if (op
== O_constant
)
3625 register valueT get
;
3626 register valueT use
;
3627 register valueT mask
;
3629 register valueT unmask
;
3631 /* JF << of >= number of bits in the object is undefined. In
3632 particular SPARC (Sun 4) has problems. */
3633 if (nbytes
>= sizeof (valueT
))
3636 if (nbytes
> sizeof (valueT
))
3639 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
3643 /* Don't store these bits. */
3644 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
3645 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
3648 unmask
= ~mask
; /* Do store these bits. */
3651 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3652 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
3655 get
= exp
->X_add_number
;
3657 if ((get
& mask
) != 0
3658 && ((get
& mask
) != mask
3659 || (get
& hibit
) == 0))
3660 { /* Leading bits contain both 0s & 1s. */
3661 as_warn (_("value 0x%lx truncated to 0x%lx"),
3662 (unsigned long) get
, (unsigned long) use
);
3664 /* Put bytes in right order. */
3665 md_number_to_chars (p
, use
, (int) nbytes
);
3667 else if (op
== O_big
)
3670 LITTLENUM_TYPE
*nums
;
3672 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
3674 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
3677 as_warn (_("bignum truncated to %d bytes"), nbytes
);
3681 if (target_big_endian
)
3683 while (nbytes
> size
)
3685 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
3686 nbytes
-= CHARS_PER_LITTLENUM
;
3687 p
+= CHARS_PER_LITTLENUM
;
3690 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
3691 while (size
>= CHARS_PER_LITTLENUM
)
3694 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
3695 size
-= CHARS_PER_LITTLENUM
;
3696 p
+= CHARS_PER_LITTLENUM
;
3701 nums
= generic_bignum
;
3702 while (size
>= CHARS_PER_LITTLENUM
)
3704 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
3706 size
-= CHARS_PER_LITTLENUM
;
3707 p
+= CHARS_PER_LITTLENUM
;
3708 nbytes
-= CHARS_PER_LITTLENUM
;
3711 while (nbytes
>= CHARS_PER_LITTLENUM
)
3713 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
3714 nbytes
-= CHARS_PER_LITTLENUM
;
3715 p
+= CHARS_PER_LITTLENUM
;
3721 memset (p
, 0, nbytes
);
3723 /* Now we need to generate a fixS to record the symbol value.
3724 This is easy for BFD. For other targets it can be more
3725 complex. For very complex cases (currently, the HPPA and
3726 NS32K), you can define TC_CONS_FIX_NEW to do whatever you
3727 want. For simpler cases, you can define TC_CONS_RELOC to be
3728 the name of the reloc code that should be stored in the fixS.
3729 If neither is defined, the code uses NO_RELOC if it is
3730 defined, and otherwise uses 0. */
3732 #ifdef BFD_ASSEMBLER
3733 #ifdef TC_CONS_FIX_NEW
3734 TC_CONS_FIX_NEW (frag_now
, p
- frag_now
->fr_literal
, nbytes
, exp
);
3737 bfd_reloc_code_real_type r
;
3754 as_bad (_("unsupported BFD relocation size %u"), nbytes
);
3758 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, (int) nbytes
, exp
,
3763 #ifdef TC_CONS_FIX_NEW
3764 TC_CONS_FIX_NEW (frag_now
, p
- frag_now
->fr_literal
, nbytes
, exp
);
3766 /* Figure out which reloc number to use. Use TC_CONS_RELOC if
3767 it is defined, otherwise use NO_RELOC if it is defined,
3769 #ifndef TC_CONS_RELOC
3771 #define TC_CONS_RELOC NO_RELOC
3773 #define TC_CONS_RELOC 0
3776 fix_new_exp (frag_now
, p
- frag_now
->fr_literal
, (int) nbytes
, exp
, 0,
3778 #endif /* TC_CONS_FIX_NEW */
3779 #endif /* BFD_ASSEMBLER */
3783 #ifdef BITFIELD_CONS_EXPRESSIONS
3785 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3786 w:x,y:z, where w and y are bitwidths and x and y are values. They
3787 then pack them all together. We do a little better in that we allow
3788 them in words, longs, etc. and we'll pack them in target byte order
3791 The rules are: pack least significant bit first, if a field doesn't
3792 entirely fit, put it in the next unit. Overflowing the bitfield is
3793 explicitly *not* even a warning. The bitwidth should be considered
3796 To use this function the tc-XXX.h file should define
3797 BITFIELD_CONS_EXPRESSIONS. */
3800 parse_bitfield_cons (exp
, nbytes
)
3802 unsigned int nbytes
;
3804 unsigned int bits_available
= BITS_PER_CHAR
* nbytes
;
3805 char *hold
= input_line_pointer
;
3807 (void) expression (exp
);
3809 if (*input_line_pointer
== ':')
3816 unsigned long width
;
3818 if (*input_line_pointer
!= ':')
3820 input_line_pointer
= hold
;
3822 } /* Next piece is not a bitfield. */
3824 /* In the general case, we can't allow
3825 full expressions with symbol
3826 differences and such. The relocation
3827 entries for symbols not defined in this
3828 assembly would require arbitrary field
3829 widths, positions, and masks which most
3830 of our current object formats don't
3833 In the specific case where a symbol
3834 *is* defined in this assembly, we
3835 *could* build fixups and track it, but
3836 this could lead to confusion for the
3837 backends. I'm lazy. I'll take any
3838 SEG_ABSOLUTE. I think that means that
3839 you can use a previous .set or
3840 .equ type symbol. xoxorich. */
3842 if (exp
->X_op
== O_absent
)
3844 as_warn (_("using a bit field width of zero"));
3845 exp
->X_add_number
= 0;
3846 exp
->X_op
= O_constant
;
3847 } /* Implied zero width bitfield. */
3849 if (exp
->X_op
!= O_constant
)
3851 *input_line_pointer
= '\0';
3852 as_bad (_("field width \"%s\" too complex for a bitfield"), hold
);
3853 *input_line_pointer
= ':';
3854 demand_empty_rest_of_line ();
3856 } /* Too complex. */
3858 if ((width
= exp
->X_add_number
) > (BITS_PER_CHAR
* nbytes
))
3860 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
3861 width
, nbytes
, (BITS_PER_CHAR
* nbytes
));
3862 width
= BITS_PER_CHAR
* nbytes
;
3865 if (width
> bits_available
)
3867 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
3868 input_line_pointer
= hold
;
3869 exp
->X_add_number
= value
;
3874 hold
= ++input_line_pointer
;
3876 (void) expression (exp
);
3877 if (exp
->X_op
!= O_constant
)
3879 char cache
= *input_line_pointer
;
3881 *input_line_pointer
= '\0';
3882 as_bad (_("field value \"%s\" too complex for a bitfield"), hold
);
3883 *input_line_pointer
= cache
;
3884 demand_empty_rest_of_line ();
3886 } /* Too complex. */
3888 value
|= ((~(-1 << width
) & exp
->X_add_number
)
3889 << ((BITS_PER_CHAR
* nbytes
) - bits_available
));
3891 if ((bits_available
-= width
) == 0
3892 || is_it_end_of_statement ()
3893 || *input_line_pointer
!= ',')
3896 } /* All the bitfields we're gonna get. */
3898 hold
= ++input_line_pointer
;
3899 (void) expression (exp
);
3902 exp
->X_add_number
= value
;
3903 exp
->X_op
= O_constant
;
3904 exp
->X_unsigned
= 1;
3908 #endif /* BITFIELD_CONS_EXPRESSIONS */
3910 /* Handle an MRI style string expression. */
3914 parse_mri_cons (exp
, nbytes
)
3916 unsigned int nbytes
;
3918 if (*input_line_pointer
!= '\''
3919 && (input_line_pointer
[1] != '\''
3920 || (*input_line_pointer
!= 'A'
3921 && *input_line_pointer
!= 'E')))
3922 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3926 unsigned int result
= 0;
3928 /* An MRI style string. Cut into as many bytes as will fit into
3929 a nbyte chunk, left justify if necessary, and separate with
3930 commas so we can try again later. */
3931 if (*input_line_pointer
== 'A')
3932 ++input_line_pointer
;
3933 else if (*input_line_pointer
== 'E')
3935 as_bad (_("EBCDIC constants are not supported"));
3936 ++input_line_pointer
;
3939 input_line_pointer
++;
3940 for (scan
= 0; scan
< nbytes
; scan
++)
3942 if (*input_line_pointer
== '\'')
3944 if (input_line_pointer
[1] == '\'')
3946 input_line_pointer
++;
3951 result
= (result
<< 8) | (*input_line_pointer
++);
3955 while (scan
< nbytes
)
3961 /* Create correct expression. */
3962 exp
->X_op
= O_constant
;
3963 exp
->X_add_number
= result
;
3965 /* Fake it so that we can read the next char too. */
3966 if (input_line_pointer
[0] != '\'' ||
3967 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
3969 input_line_pointer
-= 2;
3970 input_line_pointer
[0] = ',';
3971 input_line_pointer
[1] = '\'';
3974 input_line_pointer
++;
3977 #endif /* TC_M68K */
3979 #ifdef REPEAT_CONS_EXPRESSIONS
3981 /* Parse a repeat expression for cons. This is used by the MIPS
3982 assembler. The format is NUMBER:COUNT; NUMBER appears in the
3983 object file COUNT times.
3985 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
3988 parse_repeat_cons (exp
, nbytes
)
3990 unsigned int nbytes
;
3997 if (*input_line_pointer
!= ':')
3999 /* No repeat count. */
4003 ++input_line_pointer
;
4004 expression (&count
);
4005 if (count
.X_op
!= O_constant
4006 || count
.X_add_number
<= 0)
4008 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4012 /* The cons function is going to output this expression once. So we
4013 output it count - 1 times. */
4014 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
4015 emit_expr (exp
, nbytes
);
4018 #endif /* REPEAT_CONS_EXPRESSIONS */
4020 /* Parse a floating point number represented as a hex constant. This
4021 permits users to specify the exact bits they want in the floating
4025 hex_float (int float_type
, char *bytes
)
4057 as_bad (_("unknown floating type type '%c'"), float_type
);
4061 /* It would be nice if we could go through expression to parse the
4062 hex constant, but if we get a bignum it's a pain to sort it into
4063 the buffer correctly. */
4065 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4069 /* The MRI assembler accepts arbitrary underscores strewn about
4070 through the hex constant, so we ignore them as well. */
4071 if (*input_line_pointer
== '_')
4073 ++input_line_pointer
;
4079 as_warn (_("floating point constant too large"));
4082 d
= hex_value (*input_line_pointer
) << 4;
4083 ++input_line_pointer
;
4084 while (*input_line_pointer
== '_')
4085 ++input_line_pointer
;
4086 if (hex_p (*input_line_pointer
))
4088 d
+= hex_value (*input_line_pointer
);
4089 ++input_line_pointer
;
4091 if (target_big_endian
)
4094 bytes
[length
- i
- 1] = d
;
4100 if (target_big_endian
)
4101 memset (bytes
+ i
, 0, length
- i
);
4103 memset (bytes
, 0, length
- i
);
4111 CONStruct some more frag chars of .floats .ffloats etc.
4112 Makes 0 or more new frags.
4113 If need_pass_2 == 1, no frags are emitted.
4114 This understands only floating literals, not expressions. Sorry.
4116 A floating constant is defined by atof_generic(), except it is preceded
4117 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4118 reading, I decided to be incompatible. This always tries to give you
4119 rounded bits to the precision of the pseudo-op. Former AS did premature
4120 truncation, restored noisy bits instead of trailing 0s AND gave you
4121 a choice of 2 flavours of noise according to which of 2 floating-point
4122 scanners you directed AS to use.
4124 In: input_line_pointer->whitespace before, or '0' of flonum. */
4127 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4128 register int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4131 int length
; /* Number of chars in an object. */
4132 register char *err
; /* Error from scanning floating literal. */
4133 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4135 if (is_it_end_of_statement ())
4137 demand_empty_rest_of_line ();
4141 #ifdef md_flush_pending_output
4142 md_flush_pending_output ();
4147 /* input_line_pointer->1st char of a flonum (we hope!). */
4150 /* Skip any 0{letter} that may be present. Don't even check if the
4151 letter is legal. Someone may invent a "z" format and this routine
4152 has no use for such information. Lusers beware: you get
4153 diagnostics if your input is ill-conditioned. */
4154 if (input_line_pointer
[0] == '0'
4155 && ISALPHA (input_line_pointer
[1]))
4156 input_line_pointer
+= 2;
4158 /* Accept :xxxx, where the x's are hex digits, for a floating
4159 point with the exact digits specified. */
4160 if (input_line_pointer
[0] == ':')
4162 ++input_line_pointer
;
4163 length
= hex_float (float_type
, temp
);
4166 ignore_rest_of_line ();
4172 err
= md_atof (float_type
, temp
, &length
);
4173 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
4177 as_bad (_("bad floating literal: %s"), err
);
4178 ignore_rest_of_line ();
4189 #ifdef REPEAT_CONS_EXPRESSIONS
4190 if (*input_line_pointer
== ':')
4192 expressionS count_exp
;
4194 ++input_line_pointer
;
4195 expression (&count_exp
);
4197 if (count_exp
.X_op
!= O_constant
4198 || count_exp
.X_add_number
<= 0)
4199 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4201 count
= count_exp
.X_add_number
;
4205 while (--count
>= 0)
4207 p
= frag_more (length
);
4208 memcpy (p
, temp
, (unsigned int) length
);
4213 while (*input_line_pointer
++ == ',');
4215 /* Put terminator back into stream. */
4216 --input_line_pointer
;
4217 demand_empty_rest_of_line ();
4220 /* Return the size of a LEB128 value. */
4223 sizeof_sleb128 (offsetT value
)
4225 register int size
= 0;
4226 register unsigned byte
;
4230 byte
= (value
& 0x7f);
4231 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4232 Fortunately, we can structure things so that the extra work reduces
4233 to a noop on systems that do things "properly". */
4234 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4237 while (!(((value
== 0) && ((byte
& 0x40) == 0))
4238 || ((value
== -1) && ((byte
& 0x40) != 0))));
4244 sizeof_uleb128 (valueT value
)
4246 register int size
= 0;
4247 register unsigned byte
;
4251 byte
= (value
& 0x7f);
4261 sizeof_leb128 (valueT value
, int sign
)
4264 return sizeof_sleb128 ((offsetT
) value
);
4266 return sizeof_uleb128 (value
);
4269 /* Output a LEB128 value. */
4272 output_sleb128 (char *p
, offsetT value
)
4274 register char *orig
= p
;
4279 unsigned byte
= (value
& 0x7f);
4281 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4282 Fortunately, we can structure things so that the extra work reduces
4283 to a noop on systems that do things "properly". */
4284 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4286 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
4287 || ((value
== -1) && ((byte
& 0x40) != 0))));
4299 output_uleb128 (char *p
, valueT value
)
4305 unsigned byte
= (value
& 0x7f);
4308 /* More bytes to follow. */
4319 output_leb128 (char *p
, valueT value
, int sign
)
4322 return output_sleb128 (p
, (offsetT
) value
);
4324 return output_uleb128 (p
, value
);
4327 /* Do the same for bignums. We combine sizeof with output here in that
4328 we don't output for NULL values of P. It isn't really as critical as
4329 for "normal" values that this be streamlined. */
4332 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4339 /* Strip leading sign extensions off the bignum. */
4341 && bignum
[size
- 1] == LITTLENUM_MASK
4342 && bignum
[size
- 2] > LITTLENUM_MASK
/ 2)
4347 /* OR in the next part of the littlenum. */
4348 val
|= (*bignum
<< loaded
);
4349 loaded
+= LITTLENUM_NUMBER_OF_BITS
;
4353 /* Add bytes until there are less than 7 bits left in VAL
4354 or until every non-sign bit has been written. */
4361 || val
!= ((byte
& 0x40) == 0 ? 0 : ((valueT
) 1 << loaded
) - 1))
4368 while ((byte
& 0x80) != 0 && loaded
>= 7);
4372 /* Mop up any left-over bits (of which there will be less than 7). */
4373 if ((byte
& 0x80) != 0)
4375 /* Sign-extend VAL. */
4376 if (val
& (1 << (loaded
- 1)))
4377 val
|= ~0 << loaded
;
4387 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4394 /* Strip leading zeros off the bignum. */
4395 /* XXX: Is this needed? */
4396 while (size
> 0 && bignum
[size
- 1] == 0)
4401 if (loaded
< 7 && size
> 0)
4403 val
|= (*bignum
<< loaded
);
4404 loaded
+= 8 * CHARS_PER_LITTLENUM
;
4413 if (size
> 0 || val
)
4420 while (byte
& 0x80);
4426 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
, int sign
)
4429 return output_big_sleb128 (p
, bignum
, size
);
4431 return output_big_uleb128 (p
, bignum
, size
);
4434 /* Generate the appropriate fragments for a given expression to emit a
4438 emit_leb128_expr (expressionS
*exp
, int sign
)
4440 operatorT op
= exp
->X_op
;
4441 unsigned int nbytes
;
4443 if (op
== O_absent
|| op
== O_illegal
)
4445 as_warn (_("zero assumed for missing expression"));
4446 exp
->X_add_number
= 0;
4449 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4451 as_bad (_("floating point number invalid"));
4452 exp
->X_add_number
= 0;
4455 else if (op
== O_register
)
4457 as_warn (_("register value used as expression"));
4460 else if (op
== O_constant
4462 && (exp
->X_add_number
< 0) != !exp
->X_unsigned
)
4464 /* We're outputting a signed leb128 and the sign of X_add_number
4465 doesn't reflect the sign of the original value. Convert EXP
4466 to a correctly-extended bignum instead. */
4467 convert_to_bignum (exp
);
4471 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
4472 a signal that this is leb128 data. It shouldn't optimize this away. */
4473 nbytes
= (unsigned int) -1;
4474 if (check_eh_frame (exp
, &nbytes
))
4477 /* Let the backend know that subsequent data may be byte aligned. */
4478 #ifdef md_cons_align
4482 if (op
== O_constant
)
4484 /* If we've got a constant, emit the thing directly right now. */
4486 valueT value
= exp
->X_add_number
;
4490 size
= sizeof_leb128 (value
, sign
);
4491 p
= frag_more (size
);
4492 output_leb128 (p
, value
, sign
);
4494 else if (op
== O_big
)
4496 /* O_big is a different sort of constant. */
4501 size
= output_big_leb128 (NULL
, generic_bignum
, exp
->X_add_number
, sign
);
4502 p
= frag_more (size
);
4503 output_big_leb128 (p
, generic_bignum
, exp
->X_add_number
, sign
);
4507 /* Otherwise, we have to create a variable sized fragment and
4508 resolve things later. */
4510 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
4511 make_expr_symbol (exp
), 0, (char *) NULL
);
4515 /* Parse the .sleb128 and .uleb128 pseudos. */
4522 #ifdef md_flush_pending_output
4523 md_flush_pending_output ();
4529 emit_leb128_expr (&exp
, sign
);
4531 while (*input_line_pointer
++ == ',');
4533 input_line_pointer
--;
4534 demand_empty_rest_of_line ();
4537 /* We read 0 or more ',' separated, double-quoted strings.
4538 Caller should have checked need_pass_2 is FALSE because we don't
4542 stringer (/* Worker to do .ascii etc statements. */
4543 /* Checks end-of-line. */
4544 register int append_zero
/* 0: don't append '\0', else 1. */)
4546 register unsigned int c
;
4549 #ifdef md_flush_pending_output
4550 md_flush_pending_output ();
4553 /* The following awkward logic is to parse ZERO or more strings,
4554 comma separated. Recall a string expression includes spaces
4555 before the opening '\"' and spaces after the closing '\"'.
4556 We fake a leading ',' if there is (supposed to be)
4557 a 1st, expression. We keep demanding expressions for each ','. */
4558 if (is_it_end_of_statement ())
4560 c
= 0; /* Skip loop. */
4561 ++input_line_pointer
; /* Compensate for end of loop. */
4565 c
= ','; /* Do loop. */
4567 /* If we have been switched into the abs_section then we
4568 will not have an obstack onto which we can hang strings. */
4569 if (now_seg
== absolute_section
)
4571 as_bad (_("strings must be placed into a section"));
4573 ignore_rest_of_line ();
4576 while (c
== ',' || c
== '<' || c
== '"')
4579 switch (*input_line_pointer
)
4582 ++input_line_pointer
; /*->1st char of string. */
4583 start
= input_line_pointer
;
4584 while (is_a_char (c
= next_char_of_string ()))
4586 FRAG_APPEND_1_CHAR (c
);
4590 FRAG_APPEND_1_CHAR (0);
4592 know (input_line_pointer
[-1] == '\"');
4596 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
4597 will emit .string with a filename in the .debug section
4598 after a sequence of constants. See the comment in
4599 emit_expr for the sequence. emit_expr will set
4600 dwarf_file_string to non-zero if this string might be a
4601 source file name. */
4602 if (strcmp (segment_name (now_seg
), ".debug") != 0)
4603 dwarf_file_string
= 0;
4604 else if (dwarf_file_string
)
4606 c
= input_line_pointer
[-1];
4607 input_line_pointer
[-1] = '\0';
4608 listing_source_file (start
);
4609 input_line_pointer
[-1] = c
;
4616 input_line_pointer
++;
4617 c
= get_single_number ();
4618 FRAG_APPEND_1_CHAR (c
);
4619 if (*input_line_pointer
!= '>')
4621 as_bad (_("expected <nn>"));
4623 input_line_pointer
++;
4626 input_line_pointer
++;
4630 c
= *input_line_pointer
;
4633 demand_empty_rest_of_line ();
4636 /* FIXME-SOMEDAY: I had trouble here on characters with the
4637 high bits set. We'll probably also have trouble with
4638 multibyte chars, wide chars, etc. Also be careful about
4639 returning values bigger than 1 byte. xoxorich. */
4642 next_char_of_string (void)
4644 register unsigned int c
;
4646 c
= *input_line_pointer
++ & CHAR_MASK
;
4654 as_warn (_("unterminated string; newline inserted"));
4655 bump_line_counters ();
4658 #ifndef NO_STRING_ESCAPES
4660 switch (c
= *input_line_pointer
++)
4688 break; /* As itself. */
4704 for (i
= 0, number
= 0;
4705 ISDIGIT (c
) && i
< 3;
4706 c
= *input_line_pointer
++, i
++)
4708 number
= number
* 8 + c
- '0';
4713 --input_line_pointer
;
4722 c
= *input_line_pointer
++;
4723 while (ISXDIGIT (c
))
4726 number
= number
* 16 + c
- '0';
4727 else if (ISUPPER (c
))
4728 number
= number
* 16 + c
- 'A' + 10;
4730 number
= number
* 16 + c
- 'a' + 10;
4731 c
= *input_line_pointer
++;
4734 --input_line_pointer
;
4739 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
4740 as_warn (_("unterminated string; newline inserted"));
4742 bump_line_counters ();
4747 #ifdef ONLY_STANDARD_ESCAPES
4748 as_bad (_("bad escaped character in string"));
4750 #endif /* ONLY_STANDARD_ESCAPES */
4755 #endif /* ! defined (NO_STRING_ESCAPES) */
4764 get_segmented_expression (register expressionS
*expP
)
4766 register segT retval
;
4768 retval
= expression (expP
);
4769 if (expP
->X_op
== O_illegal
4770 || expP
->X_op
== O_absent
4771 || expP
->X_op
== O_big
)
4773 as_bad (_("expected address expression"));
4774 expP
->X_op
= O_constant
;
4775 expP
->X_add_number
= 0;
4776 retval
= absolute_section
;
4782 get_known_segmented_expression (register expressionS
*expP
)
4784 register segT retval
;
4786 if ((retval
= get_segmented_expression (expP
)) == undefined_section
)
4788 /* There is no easy way to extract the undefined symbol from the
4790 if (expP
->X_add_symbol
!= NULL
4791 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
4792 as_warn (_("symbol \"%s\" undefined; zero assumed"),
4793 S_GET_NAME (expP
->X_add_symbol
));
4795 as_warn (_("some symbol undefined; zero assumed"));
4796 retval
= absolute_section
;
4797 expP
->X_op
= O_constant
;
4798 expP
->X_add_number
= 0;
4800 know (retval
== absolute_section
|| SEG_NORMAL (retval
));
4804 char /* Return terminator. */
4805 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
4807 /* FIXME: val_pointer should probably be offsetT *. */
4808 *val_pointer
= (long) get_absolute_expression ();
4809 return (*input_line_pointer
++);
4812 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
4813 Give a warning if that happens. */
4816 demand_copy_C_string (int *len_pointer
)
4820 if ((s
= demand_copy_string (len_pointer
)) != 0)
4824 for (len
= *len_pointer
; len
> 0; len
--)
4831 as_bad (_("this string may not contain \'\\0\'"));
4839 /* Demand string, but return a safe (=private) copy of the string.
4840 Return NULL if we can't read a string here. */
4843 demand_copy_string (int *lenP
)
4845 register unsigned int c
;
4851 if (*input_line_pointer
== '\"')
4853 input_line_pointer
++; /* Skip opening quote. */
4855 while (is_a_char (c
= next_char_of_string ()))
4857 obstack_1grow (¬es
, c
);
4860 /* JF this next line is so demand_copy_C_string will return a
4861 null terminated string. */
4862 obstack_1grow (¬es
, '\0');
4863 retval
= obstack_finish (¬es
);
4867 as_bad (_("missing string"));
4869 ignore_rest_of_line ();
4875 /* In: Input_line_pointer->next character.
4877 Do: Skip input_line_pointer over all whitespace.
4879 Out: 1 if input_line_pointer->end-of-line. */
4882 is_it_end_of_statement (void)
4885 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
4889 equals (char *sym_name
, int reassign
)
4894 input_line_pointer
++;
4895 if (*input_line_pointer
== '=')
4896 input_line_pointer
++;
4898 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
4899 input_line_pointer
++;
4902 stop
= mri_comment_field (&stopc
);
4904 assign_symbol (sym_name
, !reassign
);
4908 demand_empty_rest_of_line ();
4909 mri_comment_end (stop
, stopc
);
4913 /* .incbin -- include a file verbatim at the current location. */
4916 s_incbin (int x ATTRIBUTE_UNUSED
)
4927 #ifdef md_flush_pending_output
4928 md_flush_pending_output ();
4932 filename
= demand_copy_string (& len
);
4933 if (filename
== NULL
)
4938 /* Look for optional skip and count. */
4939 if (* input_line_pointer
== ',')
4941 ++ input_line_pointer
;
4942 skip
= get_absolute_expression ();
4946 if (* input_line_pointer
== ',')
4948 ++ input_line_pointer
;
4950 count
= get_absolute_expression ();
4952 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
4958 demand_empty_rest_of_line ();
4960 /* Try opening absolute path first, then try include dirs. */
4961 binfile
= fopen (filename
, FOPEN_RB
);
4962 if (binfile
== NULL
)
4966 path
= xmalloc ((unsigned long) len
+ include_dir_maxlen
+ 5);
4968 for (i
= 0; i
< include_dir_count
; i
++)
4970 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
4972 binfile
= fopen (path
, FOPEN_RB
);
4973 if (binfile
!= NULL
)
4977 if (binfile
== NULL
)
4978 as_bad (_("file not found: %s"), filename
);
4981 path
= xstrdup (filename
);
4987 register_dependency (path
);
4989 /* Compute the length of the file. */
4990 if (fseek (binfile
, 0, SEEK_END
) != 0)
4992 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
4995 file_len
= ftell (binfile
);
4997 /* If a count was not specified use the remainder of the file. */
4999 count
= file_len
- skip
;
5001 if (skip
< 0 || count
< 0 || file_len
< 0 || skip
+ count
> file_len
)
5003 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5004 skip
, count
, file_len
);
5008 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
5010 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
5014 /* Allocate frag space and store file contents in it. */
5015 binfrag
= frag_more (count
);
5017 bytes
= fread (binfrag
, 1, count
, binfile
);
5019 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5020 path
, bytes
, count
);
5023 if (binfile
!= NULL
)
5029 /* .include -- include a file at this point. */
5032 s_include (int arg ATTRIBUTE_UNUSED
)
5041 filename
= demand_copy_string (&i
);
5042 if (filename
== NULL
)
5044 /* demand_copy_string has already printed an error and
5045 called ignore_rest_of_line. */
5053 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
5054 && *input_line_pointer
!= ' '
5055 && *input_line_pointer
!= '\t')
5057 obstack_1grow (¬es
, *input_line_pointer
);
5058 ++input_line_pointer
;
5062 obstack_1grow (¬es
, '\0');
5063 filename
= obstack_finish (¬es
);
5064 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5065 ++input_line_pointer
;
5068 demand_empty_rest_of_line ();
5069 path
= xmalloc ((unsigned long) i
+ include_dir_maxlen
+ 5 /* slop */ );
5071 for (i
= 0; i
< include_dir_count
; i
++)
5073 strcpy (path
, include_dirs
[i
]);
5075 strcat (path
, filename
);
5076 if (0 != (try = fopen (path
, FOPEN_RT
)))
5086 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5087 register_dependency (path
);
5088 input_scrub_insert_file (path
);
5092 add_include_dir (char *path
)
5096 if (include_dir_count
== 0)
5098 include_dirs
= (char **) xmalloc (2 * sizeof (*include_dirs
));
5099 include_dirs
[0] = "."; /* Current dir. */
5100 include_dir_count
= 2;
5104 include_dir_count
++;
5106 (char **) realloc (include_dirs
,
5107 include_dir_count
* sizeof (*include_dirs
));
5110 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
5113 if (i
> include_dir_maxlen
)
5114 include_dir_maxlen
= i
;
5117 /* Output debugging information to denote the source file. */
5120 generate_file_debug (void)
5122 if (debug_type
== DEBUG_STABS
)
5123 stabs_generate_asm_file ();
5126 /* Output line number debugging information for the current source line. */
5129 generate_lineno_debug (void)
5133 case DEBUG_UNSPECIFIED
:
5138 stabs_generate_asm_lineno ();
5141 ecoff_generate_asm_lineno ();
5144 /* ??? We could here indicate to dwarf2dbg.c that something
5145 has changed. However, since there is additional backend
5146 support that is required (calling dwarf2_emit_insn), we
5147 let dwarf2dbg.c call as_where on its own. */
5152 /* Output debugging information to mark a function entry point or end point.
5153 END_P is zero for .func, and non-zero for .endfunc. */
5158 do_s_func (end_p
, NULL
);
5161 /* Subroutine of s_func so targets can choose a different default prefix.
5162 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5165 do_s_func (int end_p
, const char *default_prefix
)
5167 /* Record the current function so that we can issue an error message for
5168 misplaced .func,.endfunc, and also so that .endfunc needs no
5170 static char *current_name
;
5171 static char *current_label
;
5175 if (current_name
== NULL
)
5177 as_bad (_("missing .func"));
5178 ignore_rest_of_line ();
5182 if (debug_type
== DEBUG_STABS
)
5183 stabs_generate_asm_endfunc (current_name
, current_label
);
5185 current_name
= current_label
= NULL
;
5190 char delim1
, delim2
;
5192 if (current_name
!= NULL
)
5194 as_bad (_(".endfunc missing for previous .func"));
5195 ignore_rest_of_line ();
5199 name
= input_line_pointer
;
5200 delim1
= get_symbol_end ();
5201 name
= xstrdup (name
);
5202 *input_line_pointer
= delim1
;
5204 if (*input_line_pointer
!= ',')
5207 asprintf (&label
, "%s%s", default_prefix
, name
);
5210 char leading_char
= 0;
5211 #ifdef BFD_ASSEMBLER
5212 leading_char
= bfd_get_symbol_leading_char (stdoutput
);
5214 /* Missing entry point, use function's name with the leading
5217 asprintf (&label
, "%c%s", leading_char
, name
);
5224 ++input_line_pointer
;
5226 label
= input_line_pointer
;
5227 delim2
= get_symbol_end ();
5228 label
= xstrdup (label
);
5229 *input_line_pointer
= delim2
;
5232 if (debug_type
== DEBUG_STABS
)
5233 stabs_generate_asm_func (name
, label
);
5235 current_name
= name
;
5236 current_label
= label
;
5239 demand_empty_rest_of_line ();
5243 s_ignore (int arg ATTRIBUTE_UNUSED
)
5245 ignore_rest_of_line ();
5249 read_print_statistics (FILE *file
)
5251 hash_print_statistics (file
, "pseudo-op table", po_hash
);
5254 /* Inserts the given line into the input stream.
5256 This call avoids macro/conditionals nesting checking, since the contents of
5257 the line are assumed to replace the contents of a line already scanned.
5259 An appropriate use of this function would be substitution of input lines when
5260 called by md_start_line_hook(). The given line is assumed to already be
5261 properly scrubbed. */
5264 input_scrub_insert_line (const char *line
)
5268 sb_add_string (&newline
, line
);
5269 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
5271 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5274 /* Insert a file into the input stream; the path must resolve to an actual
5275 file; no include path searching or dependency registering is performed. */
5278 input_scrub_insert_file (char *path
)
5280 input_scrub_include_file (path
, input_line_pointer
);
5281 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5284 /* Find the end of a line, considering quotation and escaping of quotes. */
5286 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5287 # define TC_SINGLE_QUOTE_STRINGS 1
5291 _find_end_of_line (char *s
, int mri_string
, int insn ATTRIBUTE_UNUSED
)
5293 char inquote
= '\0';
5296 while (!is_end_of_line
[(unsigned char) *s
]
5297 || (inquote
&& !ISCNTRL (*s
))
5298 || (inquote
== '\'' && flag_mri
)
5299 #ifdef TC_EOL_IN_INSN
5300 || (insn
&& TC_EOL_IN_INSN (s
))
5304 if (mri_string
&& *s
== '\'')
5308 else if (*s
== '\\')
5312 #ifdef TC_SINGLE_QUOTE_STRINGS
5313 || (TC_SINGLE_QUOTE_STRINGS
&& *s
== '\'')
5320 as_warn (_("missing closing `%c'"), inquote
);
5322 as_warn (_("stray `\\'"));
5327 find_end_of_line (char *s
, int mri_string
)
5329 return _find_end_of_line (s
, mri_string
, 0);