1 /* read.c - read a source file -
2 Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
3 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
4 2010, 2011 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
23 /* If your chars aren't 8 bits, you will change this a bit (eg. to 0xFF).
24 But then, GNU isn't spozed to run on your machine anyway.
25 (RMS is so shortsighted sometimes.) */
26 #define MASK_CHAR ((int)(unsigned char) -1)
28 /* This is the largest known floating point format (for now). It will
29 grow when we do 4361 style flonums. */
30 #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
32 /* Routines that read assembler source text to build spaghetti in memory.
33 Another group of these functions is in the expr.c module. */
36 #include "safe-ctype.h"
42 #include "dw2gencfi.h"
44 #ifndef TC_START_LABEL
45 #define TC_START_LABEL(x,y,z) (x == ':')
48 /* Set by the object-format or the target. */
49 #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
50 #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
55 else if ((SIZE) >= 4) \
57 else if ((SIZE) >= 2) \
65 char *input_line_pointer
; /*->next char of source file to parse. */
67 #if BITS_PER_CHAR != 8
68 /* The following table is indexed by[(char)] and will break if
69 a char does not have exactly 256 states (hopefully 0:255!)! */
78 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
83 /* The Delta 68k assembler permits % inside label names. */
88 /* The PowerPC Windows NT assemblers permits ? inside label names. */
93 /* The IA-64 assembler uses # as a suffix designating a symbol. We include
94 it in the symbol and strip it out in tc_canonicalize_symbol_name. */
103 /* The Delta 68k assembler permits ~ at start of label names. */
107 /* Used by is_... macros. our ctype[]. */
108 char lex_type
[256] = {
109 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
110 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
111 0, 0, 0, LEX_HASH
, LEX_DOLLAR
, LEX_PCT
, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
112 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM
, /* 0123456789:;<=>? */
113 LEX_AT
, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
114 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, 0, 3, /* PQRSTUVWXYZ[\]^_ */
115 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
116 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR
, 0, LEX_BR
, LEX_TILDE
, 0, /* pqrstuvwxyz{|}~. */
117 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
118 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
119 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
120 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
121 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
122 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
123 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
124 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
128 Out: 1 if this character ends a line.
129 2 if this character is a line separator. */
130 char is_end_of_line
[256] = {
132 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
134 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
136 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
137 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
138 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
139 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
140 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
141 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
142 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
143 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
144 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
145 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
146 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
147 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
148 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
149 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
150 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
153 #ifndef TC_CASE_SENSITIVE
154 char original_case_string
[128];
157 /* Functions private to this file. */
159 static char *buffer
; /* 1st char of each buffer of lines is here. */
160 static char *buffer_limit
; /*->1 + last char in buffer. */
162 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
163 in the tc-<CPU>.h file. See the "Porting GAS" section of the
165 int target_big_endian
= TARGET_BYTES_BIG_ENDIAN
;
167 /* Variables for handling include file directory table. */
169 /* Table of pointers to directories to search for .include's. */
172 /* How many are in the table. */
173 int include_dir_count
;
175 /* Length of longest in table. */
176 int include_dir_maxlen
= 1;
178 #ifndef WORKING_DOT_WORD
179 struct broken_word
*broken_words
;
180 int new_broken_words
;
183 /* The current offset into the absolute section. We don't try to
184 build frags in the absolute section, since no data can be stored
185 there. We just keep track of the current offset. */
186 addressT abs_section_offset
;
188 /* If this line had an MRI style label, it is stored in this variable.
189 This is used by some of the MRI pseudo-ops. */
192 /* This global variable is used to support MRI common sections. We
193 translate such sections into a common symbol. This variable is
194 non-NULL when we are in an MRI common section. */
195 symbolS
*mri_common_symbol
;
197 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
198 need to align to an even byte boundary unless the next pseudo-op is
199 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
201 static int mri_pending_align
;
205 /* This variable is set to be non-zero if the next string we see might
206 be the name of the source file in DWARF debugging information. See
207 the comment in emit_expr for the format we look for. */
208 static int dwarf_file_string
;
212 static void do_s_func (int end_p
, const char *default_prefix
);
213 static void do_align (int, char *, int, int);
214 static void s_align (int, int);
215 static void s_altmacro (int);
216 static void s_bad_end (int);
218 static void s_gnu_attribute (int);
220 static void s_reloc (int);
221 static int hex_float (int, char *);
222 static segT
get_known_segmented_expression (expressionS
* expP
);
223 static void pobegin (void);
224 static int get_non_macro_line_sb (sb
*);
225 static void generate_file_debug (void);
226 static char *_find_end_of_line (char *, int, int, int);
234 obj_read_begin_hook ();
236 /* Something close -- but not too close -- to a multiple of 1024.
237 The debugging malloc I'm using has 24 bytes of overhead. */
238 obstack_begin (¬es
, chunksize
);
239 obstack_begin (&cond_obstack
, chunksize
);
241 /* Use machine dependent syntax. */
242 for (p
= line_separator_chars
; *p
; p
++)
243 is_end_of_line
[(unsigned char) *p
] = 2;
244 /* Use more. FIXME-SOMEDAY. */
250 #ifndef TC_ADDRESS_BYTES
251 #define TC_ADDRESS_BYTES address_bytes
256 /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
257 contain an address. */
258 int n
= (stdoutput
->arch_info
->bits_per_address
- 1) / 8;
266 /* Set up pseudo-op tables. */
268 static struct hash_control
*po_hash
;
270 static const pseudo_typeS potable
[] = {
271 {"abort", s_abort
, 0},
272 {"align", s_align_ptwo
, 0},
273 {"altmacro", s_altmacro
, 1},
274 {"ascii", stringer
, 8+0},
275 {"asciz", stringer
, 8+1},
276 {"balign", s_align_bytes
, 0},
277 {"balignw", s_align_bytes
, -2},
278 {"balignl", s_align_bytes
, -4},
282 {"common", s_mri_common
, 0},
283 {"common.s", s_mri_common
, 1},
286 #ifdef TC_ADDRESS_BYTES
290 {"dc.d", float_cons
, 'd'},
292 {"dc.s", float_cons
, 'f'},
294 {"dc.x", float_cons
, 'x'},
296 {"dcb.b", s_space
, 1},
297 {"dcb.d", s_float_space
, 'd'},
298 {"dcb.l", s_space
, 4},
299 {"dcb.s", s_float_space
, 'f'},
300 {"dcb.w", s_space
, 2},
301 {"dcb.x", s_float_space
, 'x'},
303 {"ds.b", s_space
, 1},
304 {"ds.d", s_space
, 8},
305 {"ds.l", s_space
, 4},
306 {"ds.p", s_space
, 12},
307 {"ds.s", s_space
, 4},
308 {"ds.w", s_space
, 2},
309 {"ds.x", s_space
, 12},
310 {"debug", s_ignore
, 0},
315 {"double", float_cons
, 'd'},
317 {"eject", listing_eject
, 0}, /* Formfeed listing. */
319 {"elsec", s_else
, 0},
320 {"elseif", s_elseif
, (int) O_ne
},
322 {"endc", s_endif
, 0},
323 {"endfunc", s_func
, 1},
324 {"endif", s_endif
, 0},
325 {"endm", s_bad_end
, 0},
326 {"endr", s_bad_end
, 1},
332 {"error", s_errwarn
, 1},
333 {"exitm", s_mexit
, 0},
335 {"extern", s_ignore
, 0}, /* We treat all undef as ext. */
336 {"appfile", s_app_file
, 1},
337 {"appline", s_app_line
, 1},
339 {"file", s_app_file
, 0},
341 {"float", float_cons
, 'f'},
342 {"format", s_ignore
, 0},
344 {"global", s_globl
, 0},
345 {"globl", s_globl
, 0},
347 {"gnu_attribute", s_gnu_attribute
, 0},
350 {"if", s_if
, (int) O_ne
},
353 {"ifdef", s_ifdef
, 0},
354 {"ifeq", s_if
, (int) O_eq
},
355 {"ifeqs", s_ifeqs
, 0},
356 {"ifge", s_if
, (int) O_ge
},
357 {"ifgt", s_if
, (int) O_gt
},
358 {"ifle", s_if
, (int) O_le
},
359 {"iflt", s_if
, (int) O_lt
},
362 {"ifndef", s_ifdef
, 1},
363 {"ifne", s_if
, (int) O_ne
},
364 {"ifnes", s_ifeqs
, 1},
365 {"ifnotdef", s_ifdef
, 1},
366 {"incbin", s_incbin
, 0},
367 {"include", s_include
, 0},
373 {"lcomm", s_lcomm
, 0},
374 {"lflags", s_ignore
, 0}, /* Listing flags. */
375 {"linefile", s_app_line
, 0},
376 {"linkonce", s_linkonce
, 0},
377 {"list", listing_list
, 1}, /* Turn listing on. */
378 {"llen", listing_psize
, 1},
381 {"macro", s_macro
, 0},
382 {"mexit", s_mexit
, 0},
384 {".mri", s_mri
, 0}, /* Special case so .mri works in MRI mode. */
385 {"name", s_ignore
, 0},
386 {"noaltmacro", s_altmacro
, 0},
387 {"noformat", s_ignore
, 0},
388 {"nolist", listing_list
, 0}, /* Turn listing off. */
389 {"nopage", listing_nopage
, 0},
391 {"offset", s_struct
, 0},
393 {"p2align", s_align_ptwo
, 0},
394 {"p2alignw", s_align_ptwo
, -2},
395 {"p2alignl", s_align_ptwo
, -4},
396 {"page", listing_eject
, 0},
397 {"plen", listing_psize
, 0},
398 {"print", s_print
, 0},
399 {"psize", listing_psize
, 0}, /* Set paper size. */
400 {"purgem", s_purgem
, 0},
402 {"reloc", s_reloc
, 0},
406 {"sbttl", listing_title
, 1}, /* Subtitle of listing. */
411 {"single", float_cons
, 'f'},
413 {"space", s_space
, 0},
414 {"skip", s_space
, 0},
415 {"sleb128", s_leb128
, 1},
416 {"spc", s_ignore
, 0},
417 {"stabd", s_stab
, 'd'},
418 {"stabn", s_stab
, 'n'},
419 {"stabs", s_stab
, 's'},
420 {"string", stringer
, 8+1},
421 {"string8", stringer
, 8+1},
422 {"string16", stringer
, 16+1},
423 {"string32", stringer
, 32+1},
424 {"string64", stringer
, 64+1},
425 {"struct", s_struct
, 0},
429 /* This is for gcc to use. It's only just been added (2/94), so gcc
430 won't be able to use it for a while -- probably a year or more.
431 But once this has been released, check with gcc maintainers
432 before deleting it or even changing the spelling. */
433 {"this_GCC_requires_the_GNU_assembler", s_ignore
, 0},
434 /* If we're folding case -- done for some targets, not necessarily
435 all -- the above string in an input file will be converted to
436 this one. Match it either way... */
437 {"this_gcc_requires_the_gnu_assembler", s_ignore
, 0},
439 {"title", listing_title
, 0}, /* Listing title. */
440 {"ttl", listing_title
, 0},
442 {"uleb128", s_leb128
, 0},
446 {"xdef", s_globl
, 0},
447 {"xref", s_ignore
, 0},
448 {"xstabs", s_xstab
, 's'},
449 {"warning", s_errwarn
, 0},
450 {"weakref", s_weakref
, 0},
452 {"zero", s_space
, 0},
453 {NULL
, NULL
, 0} /* End sentinel. */
457 get_absolute_expr (expressionS
*exp
)
459 expression_and_evaluate (exp
);
460 if (exp
->X_op
!= O_constant
)
462 if (exp
->X_op
!= O_absent
)
463 as_bad (_("bad or irreducible absolute expression"));
464 exp
->X_add_number
= 0;
466 return exp
->X_add_number
;
470 get_absolute_expression (void)
474 return get_absolute_expr (&exp
);
477 static int pop_override_ok
= 0;
478 static const char *pop_table_name
;
481 pop_insert (const pseudo_typeS
*table
)
484 const pseudo_typeS
*pop
;
485 for (pop
= table
; pop
->poc_name
; pop
++)
487 errtxt
= hash_insert (po_hash
, pop
->poc_name
, (char *) pop
);
488 if (errtxt
&& (!pop_override_ok
|| strcmp (errtxt
, "exists")))
489 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name
,
494 #ifndef md_pop_insert
495 #define md_pop_insert() pop_insert(md_pseudo_table)
498 #ifndef obj_pop_insert
499 #define obj_pop_insert() pop_insert(obj_pseudo_table)
502 #ifndef cfi_pop_insert
503 #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
509 po_hash
= hash_new ();
511 /* Do the target-specific pseudo ops. */
512 pop_table_name
= "md";
515 /* Now object specific. Skip any that were in the target table. */
516 pop_table_name
= "obj";
520 /* Now portable ones. Skip any that we've seen already. */
521 pop_table_name
= "standard";
522 pop_insert (potable
);
525 pop_table_name
= "cfi";
530 #define HANDLE_CONDITIONAL_ASSEMBLY() \
531 if (ignore_input ()) \
533 char *eol = find_end_of_line (input_line_pointer, flag_m68k_mri); \
534 input_line_pointer = (input_line_pointer <= buffer_limit \
535 && eol >= buffer_limit) \
541 /* This function is used when scrubbing the characters between #APP
544 static char *scrub_string
;
545 static char *scrub_string_end
;
548 scrub_from_string (char *buf
, int buflen
)
552 copy
= scrub_string_end
- scrub_string
;
555 memcpy (buf
, scrub_string
, copy
);
556 scrub_string
+= copy
;
560 /* Helper function of read_a_source_file, which tries to expand a macro. */
562 try_macro (char term
, const char *line
)
568 if (check_macro (line
, &out
, &err
, ¯o
))
572 *input_line_pointer
++ = term
;
573 input_scrub_include_sb (&out
,
574 input_line_pointer
, 1);
577 input_scrub_next_buffer (&input_line_pointer
);
579 md_macro_info (macro
);
586 /* We read the file, putting things into a web that represents what we
587 have been reading. */
589 read_a_source_file (char *name
)
592 char *s
; /* String of symbol, '\0' appended. */
600 buffer
= input_scrub_new_file (name
);
603 listing_newline (NULL
);
604 register_dependency (name
);
606 /* Generate debugging information before we've read anything in to denote
607 this file as the "main" source file and not a subordinate one
608 (e.g. N_SO vs N_SOL in stabs). */
609 generate_file_debug ();
611 while ((buffer_limit
= input_scrub_next_buffer (&input_line_pointer
)) != 0)
612 { /* We have another line to parse. */
614 /* In order to avoid listing macro expansion lines with labels
615 multiple times, keep track of which line was last issued. */
616 static char *last_eol
;
620 while (input_line_pointer
< buffer_limit
)
622 bfd_boolean was_new_line
;
623 /* We have more of this buffer to parse. */
625 /* We now have input_line_pointer->1st char of next line.
626 If input_line_pointer [-1] == '\n' then we just
627 scanned another line: so bump line counters. */
628 was_new_line
= is_end_of_line
[(unsigned char) input_line_pointer
[-1]];
631 symbol_set_value_now (&dot_symbol
);
632 #ifdef md_start_line_hook
633 md_start_line_hook ();
635 if (input_line_pointer
[-1] == '\n')
636 bump_line_counters ();
640 /* If listing is on, and we are expanding a macro, then give
641 the listing code the contents of the expanded line. */
644 if ((listing
& LISTING_MACEXP
) && macro_nest
> 0)
646 /* Find the end of the current expanded macro line. */
647 s
= find_end_of_line (input_line_pointer
, flag_m68k_mri
);
655 /* Copy it for safe keeping. Also give an indication of
656 how much macro nesting is involved at this point. */
657 len
= s
- input_line_pointer
;
658 copy
= (char *) xmalloc (len
+ macro_nest
+ 2);
659 memset (copy
, '>', macro_nest
);
660 copy
[macro_nest
] = ' ';
661 memcpy (copy
+ macro_nest
+ 1, input_line_pointer
, len
);
662 copy
[macro_nest
+ 1 + len
] = '\0';
664 /* Install the line with the listing facility. */
665 listing_newline (copy
);
669 listing_newline (NULL
);
676 if (LABELS_WITHOUT_COLONS
|| flag_m68k_mri
)
678 /* Text at the start of a line must be a label, we
679 run down and stick a colon in. */
680 if (is_name_beginner (*input_line_pointer
))
682 char *line_start
= input_line_pointer
;
685 HANDLE_CONDITIONAL_ASSEMBLY ();
687 c
= get_symbol_end ();
689 /* In MRI mode, the EQU and MACRO pseudoops must
690 be handled specially. */
694 char *rest
= input_line_pointer
+ 1;
698 if (*rest
== ' ' || *rest
== '\t')
700 if ((strncasecmp (rest
, "EQU", 3) == 0
701 || strncasecmp (rest
, "SET", 3) == 0)
702 && (rest
[3] == ' ' || rest
[3] == '\t'))
704 input_line_pointer
= rest
+ 3;
706 strncasecmp (rest
, "SET", 3) == 0);
709 if (strncasecmp (rest
, "MACRO", 5) == 0
712 || is_end_of_line
[(unsigned char) rest
[5]]))
716 /* In MRI mode, we need to handle the MACRO
717 pseudo-op specially: we don't want to put the
718 symbol in the symbol table. */
720 #ifdef TC_START_LABEL_WITHOUT_COLON
721 && TC_START_LABEL_WITHOUT_COLON(c
,
725 line_label
= colon (line_start
);
727 line_label
= symbol_create (line_start
,
732 *input_line_pointer
= c
;
734 input_line_pointer
++;
739 /* We are at the beginning of a line, or similar place.
740 We expect a well-formed assembler statement.
741 A "symbol-name:" is a statement.
743 Depending on what compiler is used, the order of these tests
744 may vary to catch most common case 1st.
745 Each test is independent of all other tests at the (top)
748 c
= *input_line_pointer
++;
749 while (c
== '\t' || c
== ' ' || c
== '\f');
751 /* C is the 1st significant character.
752 Input_line_pointer points after that character. */
753 if (is_name_beginner (c
))
755 /* Want user-defined label or pseudo/opcode. */
756 HANDLE_CONDITIONAL_ASSEMBLY ();
758 s
= --input_line_pointer
;
759 c
= get_symbol_end (); /* name's delimiter. */
761 /* C is character after symbol.
762 That character's place in the input line is now '\0'.
763 S points to the beginning of the symbol.
764 [In case of pseudo-op, s->'.'.]
765 Input_line_pointer->'\0' where c was. */
766 if (TC_START_LABEL (c
, s
, input_line_pointer
))
770 char *rest
= input_line_pointer
+ 1;
772 /* In MRI mode, \tsym: set 0 is permitted. */
776 if (*rest
== ' ' || *rest
== '\t')
779 if ((strncasecmp (rest
, "EQU", 3) == 0
780 || strncasecmp (rest
, "SET", 3) == 0)
781 && (rest
[3] == ' ' || rest
[3] == '\t'))
783 input_line_pointer
= rest
+ 3;
789 line_label
= colon (s
); /* User-defined label. */
790 /* Put ':' back for error messages' sake. */
791 *input_line_pointer
++ = ':';
792 #ifdef tc_check_label
793 tc_check_label (line_label
);
795 /* Input_line_pointer->after ':'. */
798 else if ((c
== '=' && input_line_pointer
[1] == '=')
799 || ((c
== ' ' || c
== '\t')
800 && input_line_pointer
[1] == '='
801 && input_line_pointer
[2] == '='))
804 demand_empty_rest_of_line ();
807 || ((c
== ' ' || c
== '\t')
808 && input_line_pointer
[1] == '='))
809 #ifdef TC_EQUAL_IN_INSN
810 && !TC_EQUAL_IN_INSN (c
, s
)
815 demand_empty_rest_of_line ();
819 /* Expect pseudo-op or machine instruction. */
822 #ifndef TC_CASE_SENSITIVE
826 strncpy (original_case_string
, s2
, sizeof (original_case_string
));
827 original_case_string
[sizeof (original_case_string
) - 1] = 0;
836 if (NO_PSEUDO_DOT
|| flag_m68k_mri
)
838 /* The MRI assembler uses pseudo-ops without
840 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
);
841 if (pop
!= NULL
&& pop
->poc_handler
== NULL
)
846 || (!flag_m68k_mri
&& *s
== '.'))
850 WARNING: c has next char, which may be end-of-line.
851 We lookup the pseudo-op table with s+1 because we
852 already know that the pseudo-op begins with a '.'. */
855 pop
= (pseudo_typeS
*) hash_find (po_hash
, s
+ 1);
856 if (pop
&& !pop
->poc_handler
)
859 /* In MRI mode, we may need to insert an
860 automatic alignment directive. What a hack
862 if (mri_pending_align
864 || !((pop
->poc_handler
== cons
865 && pop
->poc_val
== 1)
866 || (pop
->poc_handler
== s_space
867 && pop
->poc_val
== 1)
868 #ifdef tc_conditional_pseudoop
869 || tc_conditional_pseudoop (pop
)
871 || pop
->poc_handler
== s_if
872 || pop
->poc_handler
== s_ifdef
873 || pop
->poc_handler
== s_ifc
874 || pop
->poc_handler
== s_ifeqs
875 || pop
->poc_handler
== s_else
876 || pop
->poc_handler
== s_endif
877 || pop
->poc_handler
== s_globl
878 || pop
->poc_handler
== s_ignore
)))
880 do_align (1, (char *) NULL
, 0, 0);
881 mri_pending_align
= 0;
883 if (line_label
!= NULL
)
885 symbol_set_frag (line_label
, frag_now
);
886 S_SET_VALUE (line_label
, frag_now_fix ());
890 /* Print the error msg now, while we still can. */
893 char *end
= input_line_pointer
;
895 *input_line_pointer
= c
;
897 c
= *--input_line_pointer
;
898 *input_line_pointer
= '\0';
899 if (! macro_defined
|| ! try_macro (c
, s
))
902 as_bad (_("unknown pseudo-op: `%s'"), s
);
903 *input_line_pointer
++ = c
;
908 /* Put it back for error messages etc. */
909 *input_line_pointer
= c
;
910 /* The following skip of whitespace is compulsory.
911 A well shaped space is sometimes all that separates
912 keyword from operands. */
913 if (c
== ' ' || c
== '\t')
914 input_line_pointer
++;
916 /* Input_line is restored.
917 Input_line_pointer->1st non-blank char
918 after pseudo-operation. */
919 (*pop
->poc_handler
) (pop
->poc_val
);
921 /* If that was .end, just get out now. */
922 if (pop
->poc_handler
== s_end
)
927 /* WARNING: c has char, which may be end-of-line. */
928 /* Also: input_line_pointer->`\0` where c was. */
929 *input_line_pointer
= c
;
930 input_line_pointer
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 1, 0);
931 c
= *input_line_pointer
;
932 *input_line_pointer
= '\0';
934 generate_lineno_debug ();
936 if (macro_defined
&& try_macro (c
, s
))
939 if (mri_pending_align
)
941 do_align (1, (char *) NULL
, 0, 0);
942 mri_pending_align
= 0;
943 if (line_label
!= NULL
)
945 symbol_set_frag (line_label
, frag_now
);
946 S_SET_VALUE (line_label
, frag_now_fix ());
950 md_assemble (s
); /* Assemble 1 instruction. */
952 *input_line_pointer
++ = c
;
954 /* We resume loop AFTER the end-of-line from
961 /* Empty statement? */
962 if (is_end_of_line
[(unsigned char) c
])
965 if ((LOCAL_LABELS_DOLLAR
|| LOCAL_LABELS_FB
) && ISDIGIT (c
))
967 /* local label ("4:") */
968 char *backup
= input_line_pointer
;
970 HANDLE_CONDITIONAL_ASSEMBLY ();
974 /* Read the whole number. */
975 while (ISDIGIT (*input_line_pointer
))
977 temp
= (temp
* 10) + *input_line_pointer
- '0';
978 ++input_line_pointer
;
981 if (LOCAL_LABELS_DOLLAR
982 && *input_line_pointer
== '$'
983 && *(input_line_pointer
+ 1) == ':')
985 input_line_pointer
+= 2;
987 if (dollar_label_defined (temp
))
989 as_fatal (_("label \"%d$\" redefined"), temp
);
992 define_dollar_label (temp
);
993 colon (dollar_label_name (temp
, 0));
998 && *input_line_pointer
++ == ':')
1000 fb_label_instance_inc (temp
);
1001 colon (fb_label_name (temp
, 0));
1005 input_line_pointer
= backup
;
1006 } /* local label ("4:") */
1008 if (c
&& strchr (line_comment_chars
, c
))
1009 { /* Its a comment. Better say APP or NO_APP. */
1014 unsigned int new_length
;
1017 s
= input_line_pointer
;
1018 if (strncmp (s
, "APP\n", 4))
1021 ignore_rest_of_line ();
1024 bump_line_counters ();
1028 ends
= strstr (s
, "#NO_APP\n");
1032 unsigned int tmp_len
;
1035 /* The end of the #APP wasn't in this buffer. We
1036 keep reading in buffers until we find the #NO_APP
1037 that goes with this #APP There is one. The specs
1039 tmp_len
= buffer_limit
- s
;
1040 tmp_buf
= (char *) xmalloc (tmp_len
+ 1);
1041 memcpy (tmp_buf
, s
, tmp_len
);
1044 new_tmp
= input_scrub_next_buffer (&buffer
);
1048 buffer_limit
= new_tmp
;
1049 input_line_pointer
= buffer
;
1050 ends
= strstr (buffer
, "#NO_APP\n");
1052 num
= ends
- buffer
;
1054 num
= buffer_limit
- buffer
;
1056 tmp_buf
= (char *) xrealloc (tmp_buf
, tmp_len
+ num
);
1057 memcpy (tmp_buf
+ tmp_len
, buffer
, num
);
1062 input_line_pointer
= ends
? ends
+ 8 : NULL
;
1070 input_line_pointer
= ends
+ 8;
1074 scrub_string_end
= ends
;
1076 new_length
= ends
- s
;
1077 new_buf
= (char *) xmalloc (new_length
);
1084 space
= (new_buf
+ new_length
) - new_tmp
;
1085 size
= do_scrub_chars (scrub_from_string
, new_tmp
, space
);
1093 new_buf
= (char *) xrealloc (new_buf
, new_length
+ 100);
1094 new_tmp
= new_buf
+ new_length
;
1101 /* We've "scrubbed" input to the preferred format. In the
1102 process we may have consumed the whole of the remaining
1103 file (and included files). We handle this formatted
1104 input similar to that of macro expansion, letting
1105 actual macro expansion (possibly nested) and other
1106 input expansion work. Beware that in messages, line
1107 numbers and possibly file names will be incorrect. */
1108 sb_add_string (&sbuf
, new_buf
);
1109 input_scrub_include_sb (&sbuf
, input_line_pointer
, 0);
1111 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
1116 HANDLE_CONDITIONAL_ASSEMBLY ();
1118 #ifdef tc_unrecognized_line
1119 if (tc_unrecognized_line (c
))
1122 input_line_pointer
--;
1123 /* Report unknown char as error. */
1124 demand_empty_rest_of_line ();
1127 #ifdef md_after_pass_hook
1128 md_after_pass_hook ();
1131 symbol_set_value_now (&dot_symbol
);
1138 /* Close the input file. */
1139 input_scrub_close ();
1140 #ifdef WARN_COMMENTS
1142 if (warn_comment
&& found_comment
)
1143 as_warn_where (found_comment_file
, found_comment
,
1144 "first comment found here");
1149 /* Convert O_constant expression EXP into the equivalent O_big representation.
1150 Take the sign of the number from X_unsigned rather than X_add_number. */
1153 convert_to_bignum (expressionS
*exp
)
1158 value
= exp
->X_add_number
;
1159 for (i
= 0; i
< sizeof (exp
->X_add_number
) / CHARS_PER_LITTLENUM
; i
++)
1161 generic_bignum
[i
] = value
& LITTLENUM_MASK
;
1162 value
>>= LITTLENUM_NUMBER_OF_BITS
;
1164 /* Add a sequence of sign bits if the top bit of X_add_number is not
1165 the sign of the original value. */
1166 if ((exp
->X_add_number
< 0) != !exp
->X_unsigned
)
1167 generic_bignum
[i
++] = exp
->X_unsigned
? 0 : LITTLENUM_MASK
;
1169 exp
->X_add_number
= i
;
1172 /* For most MRI pseudo-ops, the line actually ends at the first
1173 nonquoted space. This function looks for that point, stuffs a null
1174 in, and sets *STOPCP to the character that used to be there, and
1175 returns the location.
1177 Until I hear otherwise, I am going to assume that this is only true
1178 for the m68k MRI assembler. */
1181 mri_comment_field (char *stopcp
)
1187 know (flag_m68k_mri
);
1189 for (s
= input_line_pointer
;
1190 ((!is_end_of_line
[(unsigned char) *s
] && *s
!= ' ' && *s
!= '\t')
1198 for (s
= input_line_pointer
;
1199 !is_end_of_line
[(unsigned char) *s
];
1209 /* Skip to the end of an MRI comment field. */
1212 mri_comment_end (char *stop
, int stopc
)
1216 input_line_pointer
= stop
;
1218 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
1219 ++input_line_pointer
;
1223 s_abort (int ignore ATTRIBUTE_UNUSED
)
1225 as_fatal (_(".abort detected. Abandoning ship."));
1228 /* Guts of .align directive. N is the power of two to which to align.
1229 FILL may be NULL, or it may point to the bytes of the fill pattern.
1230 LEN is the length of whatever FILL points to, if anything. MAX is
1231 the maximum number of characters to skip when doing the alignment,
1232 or 0 if there is no maximum. */
1235 do_align (int n
, char *fill
, int len
, int max
)
1237 if (now_seg
== absolute_section
)
1241 if (*fill
++ != '\0')
1243 as_warn (_("ignoring fill value in absolute section"));
1250 #ifdef md_flush_pending_output
1251 md_flush_pending_output ();
1254 md_do_align (n
, fill
, len
, max
, just_record_alignment
);
1257 /* Only make a frag if we HAVE to... */
1258 if (n
!= 0 && !need_pass_2
)
1262 if (subseg_text_p (now_seg
))
1263 frag_align_code (n
, max
);
1265 frag_align (n
, 0, max
);
1268 frag_align (n
, *fill
, max
);
1270 frag_align_pattern (n
, fill
, len
, max
);
1274 just_record_alignment
: ATTRIBUTE_UNUSED_LABEL
1277 record_alignment (now_seg
, n
- OCTETS_PER_BYTE_POWER
);
1280 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1281 (in bytes). A negative ARG is the negative of the length of the
1282 fill pattern. BYTES_P is non-zero if the alignment value should be
1283 interpreted as the byte boundary, rather than the power of 2. */
1284 #ifndef TC_ALIGN_LIMIT
1285 #define TC_ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
1289 s_align (int arg
, int bytes_p
)
1291 unsigned int align_limit
= TC_ALIGN_LIMIT
;
1300 stop
= mri_comment_field (&stopc
);
1302 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
1307 align
= arg
; /* Default value from pseudo-op table. */
1311 align
= get_absolute_expression ();
1317 /* Convert to a power of 2. */
1322 for (i
= 0; (align
& 1) == 0; align
>>= 1, ++i
)
1325 as_bad (_("alignment not a power of 2"));
1331 if (align
> align_limit
)
1333 align
= align_limit
;
1334 as_warn (_("alignment too large: %u assumed"), align
);
1337 if (*input_line_pointer
!= ',')
1344 ++input_line_pointer
;
1345 if (*input_line_pointer
== ',')
1349 fill
= get_absolute_expression ();
1354 if (*input_line_pointer
!= ',')
1358 ++input_line_pointer
;
1359 max
= get_absolute_expression ();
1366 as_warn (_("expected fill pattern missing"));
1367 do_align (align
, (char *) NULL
, 0, max
);
1382 do_align (align
, &fill_char
, fill_len
, max
);
1388 if ((size_t) fill_len
> sizeof ab
)
1390 md_number_to_chars (ab
, fill
, fill_len
);
1391 do_align (align
, ab
, fill_len
, max
);
1395 demand_empty_rest_of_line ();
1398 mri_comment_end (stop
, stopc
);
1401 /* Handle the .align pseudo-op on machines where ".align 4" means
1402 align to a 4 byte boundary. */
1405 s_align_bytes (int arg
)
1410 /* Handle the .align pseudo-op on machines where ".align 4" means align
1411 to a 2**4 boundary. */
1414 s_align_ptwo (int arg
)
1419 /* Switch in and out of alternate macro mode. */
1424 demand_empty_rest_of_line ();
1425 macro_set_alternate (on
);
1429 s_comm_internal (int param
,
1430 symbolS
*(*comm_parse_extra
) (int, symbolS
*, addressT
))
1436 symbolS
*symbolP
= NULL
;
1442 stop
= mri_comment_field (&stopc
);
1444 name
= input_line_pointer
;
1445 c
= get_symbol_end ();
1446 /* Just after name is now '\0'. */
1447 p
= input_line_pointer
;
1452 as_bad (_("expected symbol name"));
1453 ignore_rest_of_line ();
1459 /* Accept an optional comma after the name. The comma used to be
1460 required, but Irix 5 cc does not generate it for .lcomm. */
1461 if (*input_line_pointer
== ',')
1462 input_line_pointer
++;
1464 temp
= get_absolute_expr (&exp
);
1466 size
&= ((offsetT
) 2 << (stdoutput
->arch_info
->bits_per_address
- 1)) - 1;
1467 if (exp
.X_op
== O_absent
)
1469 as_bad (_("missing size expression"));
1470 ignore_rest_of_line ();
1473 else if (temp
!= size
|| !exp
.X_unsigned
)
1475 as_warn (_("size (%ld) out of range, ignored"), (long) temp
);
1476 ignore_rest_of_line ();
1481 symbolP
= symbol_find_or_make (name
);
1482 if ((S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
1483 && !S_IS_COMMON (symbolP
))
1485 if (!S_IS_VOLATILE (symbolP
))
1488 as_bad (_("symbol `%s' is already defined"), name
);
1490 ignore_rest_of_line ();
1493 symbolP
= symbol_clone (symbolP
, 1);
1494 S_SET_SEGMENT (symbolP
, undefined_section
);
1495 S_SET_VALUE (symbolP
, 0);
1496 symbol_set_frag (symbolP
, &zero_address_frag
);
1497 S_CLEAR_VOLATILE (symbolP
);
1500 size
= S_GET_VALUE (symbolP
);
1503 else if (size
!= temp
)
1504 as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
1505 name
, (long) size
, (long) temp
);
1508 if (comm_parse_extra
!= NULL
)
1509 symbolP
= (*comm_parse_extra
) (param
, symbolP
, size
);
1512 S_SET_VALUE (symbolP
, (valueT
) size
);
1513 S_SET_EXTERNAL (symbolP
);
1514 S_SET_SEGMENT (symbolP
, bfd_com_section_ptr
);
1517 extern int flag_one
;
1518 if (size
== 0 || !flag_one
)
1519 S_GET_OTHER (symbolP
) = const_flag
;
1524 demand_empty_rest_of_line ();
1527 mri_comment_end (stop
, stopc
);
1534 s_comm_internal (ignore
, NULL
);
1537 /* The MRI COMMON pseudo-op. We handle this by creating a common
1538 symbol with the appropriate name. We make s_space do the right
1539 thing by increasing the size. */
1542 s_mri_common (int small ATTRIBUTE_UNUSED
)
1558 stop
= mri_comment_field (&stopc
);
1562 name
= input_line_pointer
;
1563 if (!ISDIGIT (*name
))
1564 c
= get_symbol_end ();
1569 ++input_line_pointer
;
1571 while (ISDIGIT (*input_line_pointer
));
1573 c
= *input_line_pointer
;
1574 *input_line_pointer
= '\0';
1576 if (line_label
!= NULL
)
1578 alc
= (char *) xmalloc (strlen (S_GET_NAME (line_label
))
1579 + (input_line_pointer
- name
)
1581 sprintf (alc
, "%s%s", name
, S_GET_NAME (line_label
));
1586 sym
= symbol_find_or_make (name
);
1587 *input_line_pointer
= c
;
1591 if (*input_line_pointer
!= ',')
1595 ++input_line_pointer
;
1596 align
= get_absolute_expression ();
1599 if (S_IS_DEFINED (sym
) && !S_IS_COMMON (sym
))
1601 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym
));
1602 ignore_rest_of_line ();
1603 mri_comment_end (stop
, stopc
);
1607 S_SET_EXTERNAL (sym
);
1608 S_SET_SEGMENT (sym
, bfd_com_section_ptr
);
1609 mri_common_symbol
= sym
;
1613 S_SET_ALIGN (sym
, align
);
1618 if (line_label
!= NULL
)
1621 exp
.X_op
= O_symbol
;
1622 exp
.X_add_symbol
= sym
;
1623 exp
.X_add_number
= 0;
1624 symbol_set_value_expression (line_label
, &exp
);
1625 symbol_set_frag (line_label
, &zero_address_frag
);
1626 S_SET_SEGMENT (line_label
, expr_section
);
1629 /* FIXME: We just ignore the small argument, which distinguishes
1630 COMMON and COMMON.S. I don't know what we can do about it. */
1632 /* Ignore the type and hptype. */
1633 if (*input_line_pointer
== ',')
1634 input_line_pointer
+= 2;
1635 if (*input_line_pointer
== ',')
1636 input_line_pointer
+= 2;
1638 demand_empty_rest_of_line ();
1640 mri_comment_end (stop
, stopc
);
1644 s_data (int ignore ATTRIBUTE_UNUSED
)
1649 temp
= get_absolute_expression ();
1650 if (flag_readonly_data_in_text
)
1652 section
= text_section
;
1656 section
= data_section
;
1658 subseg_set (section
, (subsegT
) temp
);
1663 demand_empty_rest_of_line ();
1666 /* Handle the .appfile pseudo-op. This is automatically generated by
1667 do_scrub_chars when a preprocessor # line comment is seen with a
1668 file name. This default definition may be overridden by the object
1669 or CPU specific pseudo-ops. This function is also the default
1670 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1674 s_app_file_string (char *file
, int appfile ATTRIBUTE_UNUSED
)
1678 listing_source_file (file
);
1680 register_dependency (file
);
1682 obj_app_file (file
, appfile
);
1687 s_app_file (int appfile
)
1692 /* Some assemblers tolerate immediately following '"'. */
1693 if ((s
= demand_copy_string (&length
)) != 0)
1696 = (!new_logical_line_flags (s
, -1, 1) && appfile
);
1698 /* In MRI mode, the preprocessor may have inserted an extraneous
1701 && *input_line_pointer
== '\''
1702 && is_end_of_line
[(unsigned char) input_line_pointer
[1]])
1703 ++input_line_pointer
;
1705 demand_empty_rest_of_line ();
1707 s_app_file_string (s
, appfile
);
1712 get_linefile_number (int *flag
)
1716 if (*input_line_pointer
< '0' || *input_line_pointer
> '9')
1719 *flag
= get_absolute_expression ();
1724 /* Handle the .appline pseudo-op. This is automatically generated by
1725 do_scrub_chars when a preprocessor # line comment is seen. This
1726 default definition may be overridden by the object or CPU specific
1730 s_app_line (int appline
)
1735 /* The given number is that of the next line. */
1737 l
= get_absolute_expression ();
1738 else if (!get_linefile_number (&l
))
1740 ignore_rest_of_line ();
1747 /* Some of the back ends can't deal with non-positive line numbers.
1748 Besides, it's silly. GCC however will generate a line number of
1749 zero when it is pre-processing builtins for assembler-with-cpp files:
1753 We do not want to barf on this, especially since such files are used
1754 in the GCC and GDB testsuites. So we check for negative line numbers
1755 rather than non-positive line numbers. */
1756 as_warn (_("line numbers must be positive; line number %d rejected"),
1767 if (*input_line_pointer
== '"')
1768 file
= demand_copy_string (&length
);
1774 while (get_linefile_number (&this_flag
))
1777 /* From GCC's cpp documentation:
1778 1: start of a new file.
1779 2: returning to a file after having included
1781 3: following text comes from a system header file.
1782 4: following text should be treated as extern "C".
1784 4 is nonsensical for the assembler; 3, we don't
1785 care about, so we ignore it just in case a
1786 system header file is included while
1787 preprocessing assembly. So 1 and 2 are all we
1788 care about, and they are mutually incompatible.
1789 new_logical_line_flags() demands this. */
1792 if (flags
&& flags
!= (1 << this_flag
))
1793 as_warn (_("incompatible flag %i in line directive"),
1796 flags
|= 1 << this_flag
;
1801 /* We ignore these. */
1805 as_warn (_("unsupported flag %i in line directive"),
1810 if (!is_end_of_line
[(unsigned char)*input_line_pointer
])
1815 if (appline
|| file
)
1817 new_logical_line_flags (file
, l
, flags
);
1820 listing_source_line (l
);
1824 if (appline
|| file
)
1825 demand_empty_rest_of_line ();
1827 ignore_rest_of_line ();
1830 /* Handle the .end pseudo-op. Actually, the real work is done in
1831 read_a_source_file. */
1834 s_end (int ignore ATTRIBUTE_UNUSED
)
1838 /* The MRI assembler permits the start symbol to follow .end,
1839 but we don't support that. */
1841 if (!is_end_of_line
[(unsigned char) *input_line_pointer
]
1842 && *input_line_pointer
!= '*'
1843 && *input_line_pointer
!= '!')
1844 as_warn (_("start address not supported"));
1848 /* Handle the .err pseudo-op. */
1851 s_err (int ignore ATTRIBUTE_UNUSED
)
1853 as_bad (_(".err encountered"));
1854 demand_empty_rest_of_line ();
1857 /* Handle the .error and .warning pseudo-ops. */
1863 /* The purpose for the conditional assignment is not to
1864 internationalize the directive itself, but that we need a
1865 self-contained message, one that can be passed like the
1866 demand_copy_C_string return value, and with no assumption on the
1867 location of the name of the directive within the message. */
1869 = (err
? _(".error directive invoked in source file")
1870 : _(".warning directive invoked in source file"));
1872 if (!is_it_end_of_statement ())
1874 if (*input_line_pointer
!= '\"')
1876 as_bad (_("%s argument must be a string"),
1877 err
? ".error" : ".warning");
1878 ignore_rest_of_line ();
1882 msg
= demand_copy_C_string (&len
);
1890 as_warn ("%s", msg
);
1891 demand_empty_rest_of_line ();
1894 /* Handle the MRI fail pseudo-op. */
1897 s_fail (int ignore ATTRIBUTE_UNUSED
)
1904 stop
= mri_comment_field (&stopc
);
1906 temp
= get_absolute_expression ();
1908 as_warn (_(".fail %ld encountered"), (long) temp
);
1910 as_bad (_(".fail %ld encountered"), (long) temp
);
1912 demand_empty_rest_of_line ();
1915 mri_comment_end (stop
, stopc
);
1919 s_fill (int ignore ATTRIBUTE_UNUSED
)
1921 expressionS rep_exp
;
1926 #ifdef md_flush_pending_output
1927 md_flush_pending_output ();
1930 #ifdef md_cons_align
1934 get_known_segmented_expression (&rep_exp
);
1935 if (*input_line_pointer
== ',')
1937 input_line_pointer
++;
1938 size
= get_absolute_expression ();
1939 if (*input_line_pointer
== ',')
1941 input_line_pointer
++;
1942 fill
= get_absolute_expression ();
1946 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1947 #define BSD_FILL_SIZE_CROCK_8 (8)
1948 if (size
> BSD_FILL_SIZE_CROCK_8
)
1950 as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8
);
1951 size
= BSD_FILL_SIZE_CROCK_8
;
1955 as_warn (_("size negative; .fill ignored"));
1958 else if (rep_exp
.X_op
== O_constant
&& rep_exp
.X_add_number
<= 0)
1960 if (rep_exp
.X_add_number
< 0)
1961 as_warn (_("repeat < 0; .fill ignored"));
1965 if (size
&& !need_pass_2
)
1967 if (rep_exp
.X_op
== O_constant
)
1969 p
= frag_var (rs_fill
, (int) size
, (int) size
,
1970 (relax_substateT
) 0, (symbolS
*) 0,
1971 (offsetT
) rep_exp
.X_add_number
,
1976 /* We don't have a constant repeat count, so we can't use
1977 rs_fill. We can get the same results out of rs_space,
1978 but its argument is in bytes, so we must multiply the
1979 repeat count by size. */
1982 rep_sym
= make_expr_symbol (&rep_exp
);
1985 expressionS size_exp
;
1986 size_exp
.X_op
= O_constant
;
1987 size_exp
.X_add_number
= size
;
1989 rep_exp
.X_op
= O_multiply
;
1990 rep_exp
.X_add_symbol
= rep_sym
;
1991 rep_exp
.X_op_symbol
= make_expr_symbol (&size_exp
);
1992 rep_exp
.X_add_number
= 0;
1993 rep_sym
= make_expr_symbol (&rep_exp
);
1996 p
= frag_var (rs_space
, (int) size
, (int) size
,
1997 (relax_substateT
) 0, rep_sym
, (offsetT
) 0, (char *) 0);
2000 memset (p
, 0, (unsigned int) size
);
2002 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
2003 flavoured AS. The following bizarre behaviour is to be
2004 compatible with above. I guess they tried to take up to 8
2005 bytes from a 4-byte expression and they forgot to sign
2007 #define BSD_FILL_SIZE_CROCK_4 (4)
2008 md_number_to_chars (p
, (valueT
) fill
,
2009 (size
> BSD_FILL_SIZE_CROCK_4
2010 ? BSD_FILL_SIZE_CROCK_4
2012 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
2013 but emits no error message because it seems a legal thing to do.
2014 It is a degenerate case of .fill but could be emitted by a
2017 demand_empty_rest_of_line ();
2021 s_globl (int ignore ATTRIBUTE_UNUSED
)
2030 stop
= mri_comment_field (&stopc
);
2034 name
= input_line_pointer
;
2035 c
= get_symbol_end ();
2036 symbolP
= symbol_find_or_make (name
);
2037 S_SET_EXTERNAL (symbolP
);
2039 *input_line_pointer
= c
;
2041 c
= *input_line_pointer
;
2044 input_line_pointer
++;
2046 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
2052 demand_empty_rest_of_line ();
2055 mri_comment_end (stop
, stopc
);
2059 #define skip_whitespace(str) do { if (*(str) == ' ') ++(str); } while (0)
2062 skip_past_char (char ** str
, char c
)
2072 #define skip_past_comma(str) skip_past_char (str, ',')
2074 /* Parse an attribute directive for VENDOR.
2075 Returns the attribute number read, or zero on error. */
2077 s_vendor_attribute (int vendor
)
2085 /* Read the first number or name. */
2086 skip_whitespace (input_line_pointer
);
2087 s
= input_line_pointer
;
2088 if (ISDIGIT (*input_line_pointer
))
2091 if (exp
.X_op
!= O_constant
)
2093 tag
= exp
.X_add_number
;
2099 /* A name may contain '_', but no other punctuation. */
2100 for (; ISALNUM (*input_line_pointer
) || *input_line_pointer
== '_';
2101 ++input_line_pointer
)
2106 name
= (char *) alloca (i
+ 1);
2107 memcpy (name
, s
, i
);
2110 #ifndef CONVERT_SYMBOLIC_ATTRIBUTE
2111 #define CONVERT_SYMBOLIC_ATTRIBUTE(a) -1
2114 tag
= CONVERT_SYMBOLIC_ATTRIBUTE (name
);
2117 as_bad (_("Attribute name not recognised: %s"), name
);
2118 ignore_rest_of_line ();
2123 type
= _bfd_elf_obj_attrs_arg_type (stdoutput
, vendor
, tag
);
2125 if (skip_past_comma (&input_line_pointer
) == -1)
2130 if (exp
.X_op
!= O_constant
)
2132 as_bad (_("expected numeric constant"));
2133 ignore_rest_of_line ();
2136 i
= exp
.X_add_number
;
2139 && skip_past_comma (&input_line_pointer
) == -1)
2141 as_bad (_("expected comma"));
2142 ignore_rest_of_line ();
2149 skip_whitespace (input_line_pointer
);
2150 if (*input_line_pointer
!= '"')
2152 s
= demand_copy_C_string (&len
);
2158 bfd_elf_add_obj_attr_int_string (stdoutput
, vendor
, tag
, i
, s
);
2161 bfd_elf_add_obj_attr_string (stdoutput
, vendor
, tag
, s
);
2164 bfd_elf_add_obj_attr_int (stdoutput
, vendor
, tag
, i
);
2170 demand_empty_rest_of_line ();
2173 as_bad (_("bad string constant"));
2174 ignore_rest_of_line ();
2177 as_bad (_("expected <tag> , <value>"));
2178 ignore_rest_of_line ();
2182 /* Parse a .gnu_attribute directive. */
2185 s_gnu_attribute (int ignored ATTRIBUTE_UNUSED
)
2187 s_vendor_attribute (OBJ_ATTR_GNU
);
2189 #endif /* OBJ_ELF */
2191 /* Handle the MRI IRP and IRPC pseudo-ops. */
2202 as_where (&file
, &line
);
2205 eol
= find_end_of_line (input_line_pointer
, 0);
2206 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2207 input_line_pointer
= eol
;
2211 err
= expand_irp (irpc
, 0, &s
, &out
, get_non_macro_line_sb
);
2213 as_bad_where (file
, line
, "%s", err
);
2217 input_scrub_include_sb (&out
, input_line_pointer
, 1);
2219 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2222 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
2223 the section to only be linked once. However, this is not supported
2224 by most object file formats. This takes an optional argument,
2225 which is what to do about duplicates. */
2228 s_linkonce (int ignore ATTRIBUTE_UNUSED
)
2230 enum linkonce_type type
;
2234 type
= LINKONCE_DISCARD
;
2236 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
2241 s
= input_line_pointer
;
2242 c
= get_symbol_end ();
2243 if (strcasecmp (s
, "discard") == 0)
2244 type
= LINKONCE_DISCARD
;
2245 else if (strcasecmp (s
, "one_only") == 0)
2246 type
= LINKONCE_ONE_ONLY
;
2247 else if (strcasecmp (s
, "same_size") == 0)
2248 type
= LINKONCE_SAME_SIZE
;
2249 else if (strcasecmp (s
, "same_contents") == 0)
2250 type
= LINKONCE_SAME_CONTENTS
;
2252 as_warn (_("unrecognized .linkonce type `%s'"), s
);
2254 *input_line_pointer
= c
;
2257 #ifdef obj_handle_link_once
2258 obj_handle_link_once (type
);
2259 #else /* ! defined (obj_handle_link_once) */
2263 if ((bfd_applicable_section_flags (stdoutput
) & SEC_LINK_ONCE
) == 0)
2264 as_warn (_(".linkonce is not supported for this object file format"));
2266 flags
= bfd_get_section_flags (stdoutput
, now_seg
);
2267 flags
|= SEC_LINK_ONCE
;
2272 case LINKONCE_DISCARD
:
2273 flags
|= SEC_LINK_DUPLICATES_DISCARD
;
2275 case LINKONCE_ONE_ONLY
:
2276 flags
|= SEC_LINK_DUPLICATES_ONE_ONLY
;
2278 case LINKONCE_SAME_SIZE
:
2279 flags
|= SEC_LINK_DUPLICATES_SAME_SIZE
;
2281 case LINKONCE_SAME_CONTENTS
:
2282 flags
|= SEC_LINK_DUPLICATES_SAME_CONTENTS
;
2285 if (!bfd_set_section_flags (stdoutput
, now_seg
, flags
))
2286 as_bad (_("bfd_set_section_flags: %s"),
2287 bfd_errmsg (bfd_get_error ()));
2289 #endif /* ! defined (obj_handle_link_once) */
2291 demand_empty_rest_of_line ();
2295 bss_alloc (symbolS
*symbolP
, addressT size
, int align
)
2298 segT current_seg
= now_seg
;
2299 subsegT current_subseg
= now_subseg
;
2300 segT bss_seg
= bss_section
;
2302 #if defined (TC_MIPS) || defined (TC_ALPHA)
2303 if (OUTPUT_FLAVOR
== bfd_target_ecoff_flavour
2304 || OUTPUT_FLAVOR
== bfd_target_elf_flavour
)
2306 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
2307 if (size
<= bfd_get_gp_size (stdoutput
))
2309 bss_seg
= subseg_new (".sbss", 1);
2310 seg_info (bss_seg
)->bss
= 1;
2311 if (!bfd_set_section_flags (stdoutput
, bss_seg
, SEC_ALLOC
))
2312 as_warn (_("error setting flags for \".sbss\": %s"),
2313 bfd_errmsg (bfd_get_error ()));
2317 subseg_set (bss_seg
, 1);
2321 record_alignment (bss_seg
, align
);
2322 frag_align (align
, 0, 0);
2325 /* Detach from old frag. */
2326 if (S_GET_SEGMENT (symbolP
) == bss_seg
)
2327 symbol_get_frag (symbolP
)->fr_symbol
= NULL
;
2329 symbol_set_frag (symbolP
, frag_now
);
2330 pfrag
= frag_var (rs_org
, 1, 1, 0, symbolP
, size
, NULL
);
2334 S_SET_SIZE (symbolP
, size
);
2336 S_SET_SEGMENT (symbolP
, bss_seg
);
2339 /* The symbol may already have been created with a preceding
2340 ".globl" directive -- be careful not to step on storage class
2341 in that case. Otherwise, set it to static. */
2342 if (S_GET_STORAGE_CLASS (symbolP
) != C_EXT
)
2343 S_SET_STORAGE_CLASS (symbolP
, C_STAT
);
2344 #endif /* OBJ_COFF */
2346 subseg_set (current_seg
, current_subseg
);
2350 parse_align (int align_bytes
)
2356 if (*input_line_pointer
!= ',')
2359 as_bad (_("expected alignment after size"));
2360 ignore_rest_of_line ();
2364 input_line_pointer
++;
2367 align
= get_absolute_expr (&exp
);
2368 if (exp
.X_op
== O_absent
)
2371 if (!exp
.X_unsigned
)
2373 as_warn (_("alignment negative; 0 assumed"));
2377 if (align_bytes
&& align
!= 0)
2379 /* convert to a power of 2 alignment */
2380 unsigned int alignp2
= 0;
2381 while ((align
& 1) == 0)
2382 align
>>= 1, ++alignp2
;
2385 as_bad (_("alignment not a power of 2"));
2386 ignore_rest_of_line ();
2394 /* Called from s_comm_internal after symbol name and size have been
2395 parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
2396 1 if this was a ".bss" directive which has a 3rd argument
2397 (alignment as a power of 2), or 2 if this was a ".bss" directive
2398 with alignment in bytes. */
2401 s_lcomm_internal (int needs_align
, symbolS
*symbolP
, addressT size
)
2407 align
= parse_align (needs_align
- 1);
2408 if (align
== (addressT
) -1)
2412 /* Assume some objects may require alignment on some systems. */
2413 TC_IMPLICIT_LCOMM_ALIGNMENT (size
, align
);
2415 bss_alloc (symbolP
, size
, align
);
2420 s_lcomm (int needs_align
)
2422 s_comm_internal (needs_align
, s_lcomm_internal
);
2426 s_lcomm_bytes (int needs_align
)
2428 s_comm_internal (needs_align
* 2, s_lcomm_internal
);
2432 s_lsym (int ignore ATTRIBUTE_UNUSED
)
2440 /* We permit ANY defined expression: BSD4.2 demands constants. */
2441 name
= input_line_pointer
;
2442 c
= get_symbol_end ();
2443 p
= input_line_pointer
;
2448 as_bad (_("expected symbol name"));
2449 ignore_rest_of_line ();
2455 if (*input_line_pointer
!= ',')
2458 as_bad (_("expected comma after \"%s\""), name
);
2460 ignore_rest_of_line ();
2464 input_line_pointer
++;
2465 expression_and_evaluate (&exp
);
2467 if (exp
.X_op
!= O_constant
2468 && exp
.X_op
!= O_register
)
2470 as_bad (_("bad expression"));
2471 ignore_rest_of_line ();
2476 symbolP
= symbol_find_or_make (name
);
2478 if (S_GET_SEGMENT (symbolP
) == undefined_section
)
2480 /* The name might be an undefined .global symbol; be sure to
2481 keep the "external" bit. */
2482 S_SET_SEGMENT (symbolP
,
2483 (exp
.X_op
== O_constant
2486 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
2490 as_bad (_("symbol `%s' is already defined"), name
);
2494 demand_empty_rest_of_line ();
2497 /* Read a line into an sb. Returns the character that ended the line
2498 or zero if there are no more lines. */
2501 get_line_sb (sb
*line
, int in_macro
)
2505 if (input_line_pointer
[-1] == '\n')
2506 bump_line_counters ();
2508 if (input_line_pointer
>= buffer_limit
)
2510 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2511 if (buffer_limit
== 0)
2515 eol
= _find_end_of_line (input_line_pointer
, flag_m68k_mri
, 0, in_macro
);
2516 sb_add_buffer (line
, input_line_pointer
, eol
- input_line_pointer
);
2517 input_line_pointer
= eol
;
2519 /* Don't skip multiple end-of-line characters, because that breaks support
2520 for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
2521 characters but isn't. Instead just skip one end of line character and
2522 return the character skipped so that the caller can re-insert it if
2524 return *input_line_pointer
++;
2528 get_non_macro_line_sb (sb
*line
)
2530 return get_line_sb (line
, 0);
2534 get_macro_line_sb (sb
*line
)
2536 return get_line_sb (line
, 1);
2539 /* Define a macro. This is an interface to macro.c. */
2542 s_macro (int ignore ATTRIBUTE_UNUSED
)
2550 as_where (&file
, &line
);
2553 eol
= find_end_of_line (input_line_pointer
, 0);
2554 sb_add_buffer (&s
, input_line_pointer
, eol
- input_line_pointer
);
2555 input_line_pointer
= eol
;
2557 if (line_label
!= NULL
)
2562 sb_add_string (&label
, S_GET_NAME (line_label
));
2563 err
= define_macro (0, &s
, &label
, get_macro_line_sb
, file
, line
, &name
);
2567 err
= define_macro (0, &s
, NULL
, get_macro_line_sb
, file
, line
, &name
);
2569 as_bad_where (file
, line
, err
, name
);
2572 if (line_label
!= NULL
)
2574 S_SET_SEGMENT (line_label
, absolute_section
);
2575 S_SET_VALUE (line_label
, 0);
2576 symbol_set_frag (line_label
, &zero_address_frag
);
2579 if (((NO_PSEUDO_DOT
|| flag_m68k_mri
)
2580 && hash_find (po_hash
, name
) != NULL
)
2583 && hash_find (po_hash
, name
+ 1) != NULL
))
2584 as_warn_where (file
,
2586 _("attempt to redefine pseudo-op `%s' ignored"),
2593 /* Handle the .mexit pseudo-op, which immediately exits a macro
2597 s_mexit (int ignore ATTRIBUTE_UNUSED
)
2601 cond_exit_macro (macro_nest
);
2602 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2605 as_warn (_("ignoring macro exit outside a macro definition."));
2608 /* Switch in and out of MRI mode. */
2611 s_mri (int ignore ATTRIBUTE_UNUSED
)
2614 #ifdef MRI_MODE_CHANGE
2618 on
= get_absolute_expression ();
2619 #ifdef MRI_MODE_CHANGE
2620 old_flag
= flag_mri
;
2639 /* Operator precedence changes in m68k MRI mode, so we need to
2640 update the operator rankings. */
2641 expr_set_precedence ();
2643 #ifdef MRI_MODE_CHANGE
2645 MRI_MODE_CHANGE (on
);
2648 demand_empty_rest_of_line ();
2651 /* Handle changing the location counter. */
2654 do_org (segT segment
, expressionS
*exp
, int fill
)
2656 if (segment
!= now_seg
2657 && segment
!= absolute_section
2658 && segment
!= expr_section
)
2659 as_bad (_("invalid segment \"%s\""), segment_name (segment
));
2661 if (now_seg
== absolute_section
)
2664 as_warn (_("ignoring fill value in absolute section"));
2665 if (exp
->X_op
!= O_constant
)
2667 as_bad (_("only constant offsets supported in absolute section"));
2668 exp
->X_add_number
= 0;
2670 abs_section_offset
= exp
->X_add_number
;
2675 symbolS
*sym
= exp
->X_add_symbol
;
2676 offsetT off
= exp
->X_add_number
* OCTETS_PER_BYTE
;
2678 if (exp
->X_op
!= O_constant
&& exp
->X_op
!= O_symbol
)
2680 /* Handle complex expressions. */
2681 sym
= make_expr_symbol (exp
);
2685 p
= frag_var (rs_org
, 1, 1, (relax_substateT
) 0, sym
, off
, (char *) 0);
2691 s_org (int ignore ATTRIBUTE_UNUSED
)
2697 #ifdef md_flush_pending_output
2698 md_flush_pending_output ();
2701 /* The m68k MRI assembler has a different meaning for .org. It
2702 means to create an absolute section at a given address. We can't
2703 support that--use a linker script instead. */
2706 as_bad (_("MRI style ORG pseudo-op not supported"));
2707 ignore_rest_of_line ();
2711 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2712 thing as a sub-segment-relative origin. Any absolute origin is
2713 given a warning, then assumed to be segment-relative. Any
2714 segmented origin expression ("foo+42") had better be in the right
2715 segment or the .org is ignored.
2717 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2718 we never know sub-segment sizes when we are reading code. BSD
2719 will crash trying to emit negative numbers of filler bytes in
2720 certain .orgs. We don't crash, but see as-write for that code.
2722 Don't make frag if need_pass_2==1. */
2723 segment
= get_known_segmented_expression (&exp
);
2724 if (*input_line_pointer
== ',')
2726 input_line_pointer
++;
2727 temp_fill
= get_absolute_expression ();
2733 do_org (segment
, &exp
, temp_fill
);
2735 demand_empty_rest_of_line ();
2738 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2739 called by the obj-format routine which handles section changing
2740 when in MRI mode. It will create a new section, and return it. It
2741 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2742 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
2745 s_mri_sect (char *type ATTRIBUTE_UNUSED
)
2755 name
= input_line_pointer
;
2756 if (!ISDIGIT (*name
))
2757 c
= get_symbol_end ();
2762 ++input_line_pointer
;
2764 while (ISDIGIT (*input_line_pointer
));
2766 c
= *input_line_pointer
;
2767 *input_line_pointer
= '\0';
2770 name
= xstrdup (name
);
2772 *input_line_pointer
= c
;
2774 seg
= subseg_new (name
, 0);
2776 if (*input_line_pointer
== ',')
2780 ++input_line_pointer
;
2781 align
= get_absolute_expression ();
2782 record_alignment (seg
, align
);
2786 if (*input_line_pointer
== ',')
2788 c
= *++input_line_pointer
;
2790 if (c
== 'C' || c
== 'D' || c
== 'M' || c
== 'R')
2793 as_bad (_("unrecognized section type"));
2794 ++input_line_pointer
;
2799 flags
= SEC_NO_FLAGS
;
2801 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
;
2802 else if (*type
== 'D' || *type
== 'M')
2803 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
;
2804 else if (*type
== 'R')
2805 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_DATA
| SEC_READONLY
| SEC_ROM
;
2806 if (flags
!= SEC_NO_FLAGS
)
2808 if (!bfd_set_section_flags (stdoutput
, seg
, flags
))
2809 as_warn (_("error setting flags for \"%s\": %s"),
2810 bfd_section_name (stdoutput
, seg
),
2811 bfd_errmsg (bfd_get_error ()));
2816 /* Ignore the HP type. */
2817 if (*input_line_pointer
== ',')
2818 input_line_pointer
+= 2;
2820 demand_empty_rest_of_line ();
2822 #else /* ! TC_M68K */
2831 name
= input_line_pointer
;
2832 c
= get_symbol_end ();
2834 name
= xstrdup (name
);
2836 *input_line_pointer
= c
;
2838 seg
= subseg_new (name
, 0);
2840 if (*input_line_pointer
!= ',')
2846 ++input_line_pointer
;
2848 sectype
= input_line_pointer
;
2849 c
= get_symbol_end ();
2850 if (*sectype
== '\0')
2852 else if (strcasecmp (sectype
, "text") == 0)
2854 else if (strcasecmp (sectype
, "data") == 0)
2856 else if (strcasecmp (sectype
, "romdata") == 0)
2859 as_warn (_("unrecognized section type `%s'"), sectype
);
2860 *input_line_pointer
= c
;
2863 if (*input_line_pointer
== ',')
2867 ++input_line_pointer
;
2869 seccmd
= input_line_pointer
;
2870 c
= get_symbol_end ();
2871 if (strcasecmp (seccmd
, "absolute") == 0)
2873 as_bad (_("absolute sections are not supported"));
2874 *input_line_pointer
= c
;
2875 ignore_rest_of_line ();
2878 else if (strcasecmp (seccmd
, "align") == 0)
2882 *input_line_pointer
= c
;
2883 align
= get_absolute_expression ();
2884 record_alignment (seg
, align
);
2888 as_warn (_("unrecognized section command `%s'"), seccmd
);
2889 *input_line_pointer
= c
;
2893 demand_empty_rest_of_line ();
2895 #else /* ! TC_I960 */
2896 /* The MRI assembler seems to use different forms of .sect for
2897 different targets. */
2898 as_bad ("MRI mode not supported for this target");
2899 ignore_rest_of_line ();
2900 #endif /* ! TC_I960 */
2901 #endif /* ! TC_M68K */
2904 /* Handle the .print pseudo-op. */
2907 s_print (int ignore ATTRIBUTE_UNUSED
)
2912 s
= demand_copy_C_string (&len
);
2915 demand_empty_rest_of_line ();
2918 /* Handle the .purgem pseudo-op. */
2921 s_purgem (int ignore ATTRIBUTE_UNUSED
)
2923 if (is_it_end_of_statement ())
2925 demand_empty_rest_of_line ();
2935 name
= input_line_pointer
;
2936 c
= get_symbol_end ();
2937 delete_macro (name
);
2938 *input_line_pointer
= c
;
2941 while (*input_line_pointer
++ == ',');
2943 --input_line_pointer
;
2944 demand_empty_rest_of_line ();
2947 /* Handle the .endm/.endr pseudo-ops. */
2950 s_bad_end (int endr
)
2952 as_warn (_(".end%c encountered without preceeding %s"),
2954 endr
? ".rept, .irp, or .irpc" : ".macro");
2955 demand_empty_rest_of_line ();
2958 /* Handle the .rept pseudo-op. */
2961 s_rept (int ignore ATTRIBUTE_UNUSED
)
2965 count
= get_absolute_expression ();
2967 do_repeat (count
, "REPT", "ENDR");
2970 /* This function provides a generic repeat block implementation. It allows
2971 different directives to be used as the start/end keys. */
2974 do_repeat (int count
, const char *start
, const char *end
)
2980 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
2982 as_bad (_("%s without %s"), start
, end
);
2988 sb_add_sb (&many
, &one
);
2992 input_scrub_include_sb (&many
, input_line_pointer
, 1);
2994 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
2997 /* Like do_repeat except that any text matching EXPANDER in the
2998 block is replaced by the itteration count. */
3001 do_repeat_with_expander (int count
,
3004 const char * expander
)
3010 if (!buffer_and_nest (start
, end
, &one
, get_non_macro_line_sb
))
3012 as_bad (_("%s without %s"), start
, end
);
3018 if (expander
!= NULL
&& strstr (one
.ptr
, expander
) != NULL
)
3020 while (count
-- > 0)
3026 sb_new (& processed
);
3027 sb_add_sb (& processed
, & one
);
3028 sub
= strstr (processed
.ptr
, expander
);
3029 len
= sprintf (sub
, "%d", count
);
3030 gas_assert (len
< 8);
3031 strcpy (sub
+ len
, sub
+ 8);
3032 processed
.len
-= (8 - len
);
3033 sb_add_sb (& many
, & processed
);
3034 sb_kill (& processed
);
3039 sb_add_sb (&many
, &one
);
3043 input_scrub_include_sb (&many
, input_line_pointer
, 1);
3045 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3048 /* Skip to end of current repeat loop; EXTRA indicates how many additional
3049 input buffers to skip. Assumes that conditionals preceding the loop end
3050 are properly nested.
3052 This function makes it easier to implement a premature "break" out of the
3053 loop. The EXTRA arg accounts for other buffers we might have inserted,
3054 such as line substitutions. */
3057 end_repeat (int extra
)
3059 cond_exit_macro (macro_nest
);
3060 while (extra
-- >= 0)
3061 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
3065 assign_symbol (char *name
, int mode
)
3069 if (name
[0] == '.' && name
[1] == '\0')
3071 /* Turn '. = mumble' into a .org mumble. */
3075 segment
= get_known_segmented_expression (&exp
);
3078 do_org (segment
, &exp
, 0);
3083 if ((symbolP
= symbol_find (name
)) == NULL
3084 && (symbolP
= md_undefined_symbol (name
)) == NULL
)
3086 symbolP
= symbol_find_or_make (name
);
3088 /* When doing symbol listings, play games with dummy fragments living
3089 outside the normal fragment chain to record the file and line info
3091 if (listing
& LISTING_SYMBOLS
)
3093 extern struct list_info_struct
*listing_tail
;
3094 fragS
*dummy_frag
= (fragS
*) xcalloc (1, sizeof (fragS
));
3095 dummy_frag
->line
= listing_tail
;
3096 dummy_frag
->fr_symbol
= symbolP
;
3097 symbol_set_frag (symbolP
, dummy_frag
);
3101 /* "set" symbols are local unless otherwise specified. */
3102 SF_SET_LOCAL (symbolP
);
3106 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3108 /* Permit register names to be redefined. */
3109 if ((mode
!= 0 || !S_IS_VOLATILE (symbolP
))
3110 && S_GET_SEGMENT (symbolP
) != reg_section
)
3112 as_bad (_("symbol `%s' is already defined"), name
);
3113 symbolP
= symbol_clone (symbolP
, 0);
3115 /* If the symbol is volatile, copy the symbol and replace the
3116 original with the copy, so that previous uses of the symbol will
3117 retain the value of the symbol at the point of use. */
3118 else if (S_IS_VOLATILE (symbolP
))
3119 symbolP
= symbol_clone (symbolP
, 1);
3123 S_SET_VOLATILE (symbolP
);
3125 S_SET_FORWARD_REF (symbolP
);
3127 pseudo_set (symbolP
);
3130 /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
3131 then this is .equiv, and it is an error if the symbol is already
3132 defined. If EQUIV is -1, the symbol additionally is a forward
3142 /* Especial apologies for the random logic:
3143 this just grew, and could be parsed much more simply!
3145 name
= input_line_pointer
;
3146 delim
= get_symbol_end ();
3147 end_name
= input_line_pointer
;
3150 if (name
== end_name
)
3152 as_bad (_("expected symbol name"));
3153 ignore_rest_of_line ();
3159 if (*input_line_pointer
!= ',')
3162 as_bad (_("expected comma after \"%s\""), name
);
3164 ignore_rest_of_line ();
3168 input_line_pointer
++;
3171 assign_symbol (name
, equiv
);
3174 demand_empty_rest_of_line ();
3187 #ifdef md_flush_pending_output
3188 md_flush_pending_output ();
3191 #ifdef md_cons_align
3196 stop
= mri_comment_field (&stopc
);
3198 /* In m68k MRI mode, we need to align to a word boundary, unless
3200 if (flag_m68k_mri
&& mult
> 1)
3202 if (now_seg
== absolute_section
)
3204 abs_section_offset
+= abs_section_offset
& 1;
3205 if (line_label
!= NULL
)
3206 S_SET_VALUE (line_label
, abs_section_offset
);
3208 else if (mri_common_symbol
!= NULL
)
3212 mri_val
= S_GET_VALUE (mri_common_symbol
);
3213 if ((mri_val
& 1) != 0)
3215 S_SET_VALUE (mri_common_symbol
, mri_val
+ 1);
3216 if (line_label
!= NULL
)
3218 expressionS
*symexp
;
3220 symexp
= symbol_get_value_expression (line_label
);
3221 know (symexp
->X_op
== O_symbol
);
3222 know (symexp
->X_add_symbol
== mri_common_symbol
);
3223 symexp
->X_add_number
+= 1;
3229 do_align (1, (char *) NULL
, 0, 0);
3230 if (line_label
!= NULL
)
3232 symbol_set_frag (line_label
, frag_now
);
3233 S_SET_VALUE (line_label
, frag_now_fix ());
3243 if (*input_line_pointer
== ',')
3245 ++input_line_pointer
;
3250 val
.X_op
= O_constant
;
3251 val
.X_add_number
= 0;
3254 if (val
.X_op
!= O_constant
3255 || val
.X_add_number
< - 0x80
3256 || val
.X_add_number
> 0xff
3257 || (mult
!= 0 && mult
!= 1 && val
.X_add_number
!= 0))
3259 resolve_expression (&exp
);
3260 if (exp
.X_op
!= O_constant
)
3261 as_bad (_("unsupported variable size or fill value"));
3268 bytes
= mult
* exp
.X_add_number
;
3269 for (i
= 0; i
< exp
.X_add_number
; i
++)
3270 emit_expr (&val
, mult
);
3275 if (now_seg
== absolute_section
|| mri_common_symbol
!= NULL
)
3276 resolve_expression (&exp
);
3278 if (exp
.X_op
== O_constant
)
3282 repeat
= exp
.X_add_number
;
3289 as_warn (_(".space repeat count is zero, ignored"));
3290 else if (repeat
< 0)
3291 as_warn (_(".space repeat count is negative, ignored"));
3295 /* If we are in the absolute section, just bump the offset. */
3296 if (now_seg
== absolute_section
)
3298 abs_section_offset
+= repeat
;
3302 /* If we are secretly in an MRI common section, then
3303 creating space just increases the size of the common
3305 if (mri_common_symbol
!= NULL
)
3307 S_SET_VALUE (mri_common_symbol
,
3308 S_GET_VALUE (mri_common_symbol
) + repeat
);
3313 p
= frag_var (rs_fill
, 1, 1, (relax_substateT
) 0, (symbolS
*) 0,
3314 (offsetT
) repeat
, (char *) 0);
3318 if (now_seg
== absolute_section
)
3320 as_bad (_("space allocation too complex in absolute section"));
3321 subseg_set (text_section
, 0);
3324 if (mri_common_symbol
!= NULL
)
3326 as_bad (_("space allocation too complex in common section"));
3327 mri_common_symbol
= NULL
;
3331 p
= frag_var (rs_space
, 1, 1, (relax_substateT
) 0,
3332 make_expr_symbol (&exp
), (offsetT
) 0, (char *) 0);
3336 *p
= val
.X_add_number
;
3341 /* In MRI mode, after an odd number of bytes, we must align to an
3342 even word boundary, unless the next instruction is a dc.b, ds.b
3344 if (flag_mri
&& (bytes
& 1) != 0)
3345 mri_pending_align
= 1;
3347 demand_empty_rest_of_line ();
3350 mri_comment_end (stop
, stopc
);
3353 /* This is like s_space, but the value is a floating point number with
3354 the given precision. This is for the MRI dcb.s pseudo-op and
3358 s_float_space (int float_type
)
3362 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
3366 #ifdef md_cons_align
3371 stop
= mri_comment_field (&stopc
);
3373 count
= get_absolute_expression ();
3376 if (*input_line_pointer
!= ',')
3378 as_bad (_("missing value"));
3379 ignore_rest_of_line ();
3381 mri_comment_end (stop
, stopc
);
3385 ++input_line_pointer
;
3389 /* Skip any 0{letter} that may be present. Don't even check if the
3390 * letter is legal. */
3391 if (input_line_pointer
[0] == '0'
3392 && ISALPHA (input_line_pointer
[1]))
3393 input_line_pointer
+= 2;
3395 /* Accept :xxxx, where the x's are hex digits, for a floating point
3396 with the exact digits specified. */
3397 if (input_line_pointer
[0] == ':')
3399 flen
= hex_float (float_type
, temp
);
3402 ignore_rest_of_line ();
3404 mri_comment_end (stop
, stopc
);
3412 err
= md_atof (float_type
, temp
, &flen
);
3413 know (flen
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
3414 know (err
!= NULL
|| flen
> 0);
3417 as_bad (_("bad floating literal: %s"), err
);
3418 ignore_rest_of_line ();
3420 mri_comment_end (stop
, stopc
);
3425 while (--count
>= 0)
3429 p
= frag_more (flen
);
3430 memcpy (p
, temp
, (unsigned int) flen
);
3433 demand_empty_rest_of_line ();
3436 mri_comment_end (stop
, stopc
);
3439 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3442 s_struct (int ignore ATTRIBUTE_UNUSED
)
3448 stop
= mri_comment_field (&stopc
);
3449 abs_section_offset
= get_absolute_expression ();
3450 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
3451 /* The ELF backend needs to know that we are changing sections, so
3452 that .previous works correctly. */
3454 obj_elf_section_change_hook ();
3456 subseg_set (absolute_section
, 0);
3457 demand_empty_rest_of_line ();
3459 mri_comment_end (stop
, stopc
);
3463 s_text (int ignore ATTRIBUTE_UNUSED
)
3467 temp
= get_absolute_expression ();
3468 subseg_set (text_section
, (subsegT
) temp
);
3469 demand_empty_rest_of_line ();
3471 const_flag
&= ~IN_DEFAULT_SECTION
;
3475 /* .weakref x, y sets x as an alias to y that, as long as y is not
3476 referenced directly, will cause y to become a weak symbol. */
3478 s_weakref (int ignore ATTRIBUTE_UNUSED
)
3487 name
= input_line_pointer
;
3488 delim
= get_symbol_end ();
3489 end_name
= input_line_pointer
;
3491 if (name
== end_name
)
3493 as_bad (_("expected symbol name"));
3495 ignore_rest_of_line ();
3499 symbolP
= symbol_find_or_make (name
);
3501 if (S_IS_DEFINED (symbolP
) || symbol_equated_p (symbolP
))
3503 if (!S_IS_VOLATILE (symbolP
))
3505 as_bad (_("symbol `%s' is already defined"), name
);
3507 ignore_rest_of_line ();
3510 symbolP
= symbol_clone (symbolP
, 1);
3511 S_CLEAR_VOLATILE (symbolP
);
3518 if (*input_line_pointer
!= ',')
3521 as_bad (_("expected comma after \"%s\""), name
);
3523 ignore_rest_of_line ();
3527 input_line_pointer
++;
3531 name
= input_line_pointer
;
3532 delim
= get_symbol_end ();
3533 end_name
= input_line_pointer
;
3535 if (name
== end_name
)
3537 as_bad (_("expected symbol name"));
3538 ignore_rest_of_line ();
3542 if ((symbolP2
= symbol_find_noref (name
, 1)) == NULL
3543 && (symbolP2
= md_undefined_symbol (name
)) == NULL
)
3545 symbolP2
= symbol_find_or_make (name
);
3546 S_SET_WEAKREFD (symbolP2
);
3550 symbolS
*symp
= symbolP2
;
3552 while (S_IS_WEAKREFR (symp
) && symp
!= symbolP
)
3554 expressionS
*expP
= symbol_get_value_expression (symp
);
3556 gas_assert (expP
->X_op
== O_symbol
3557 && expP
->X_add_number
== 0);
3558 symp
= expP
->X_add_symbol
;
3560 if (symp
== symbolP
)
3564 loop
= concat (S_GET_NAME (symbolP
),
3565 " => ", S_GET_NAME (symbolP2
), (const char *) NULL
);
3568 while (symp
!= symbolP
)
3570 char *old_loop
= loop
;
3571 symp
= symbol_get_value_expression (symp
)->X_add_symbol
;
3572 loop
= concat (loop
, " => ", S_GET_NAME (symp
),
3573 (const char *) NULL
);
3577 as_bad (_("%s: would close weakref loop: %s"),
3578 S_GET_NAME (symbolP
), loop
);
3583 ignore_rest_of_line ();
3587 /* Short-circuiting instead of just checking here might speed
3588 things up a tiny little bit, but loop error messages would
3589 miss intermediate links. */
3590 /* symbolP2 = symp; */
3595 memset (&exp
, 0, sizeof (exp
));
3596 exp
.X_op
= O_symbol
;
3597 exp
.X_add_symbol
= symbolP2
;
3599 S_SET_SEGMENT (symbolP
, undefined_section
);
3600 symbol_set_value_expression (symbolP
, &exp
);
3601 symbol_set_frag (symbolP
, &zero_address_frag
);
3602 S_SET_WEAKREFR (symbolP
);
3604 demand_empty_rest_of_line ();
3608 /* Verify that we are at the end of a line. If not, issue an error and
3612 demand_empty_rest_of_line (void)
3615 if (is_end_of_line
[(unsigned char) *input_line_pointer
])
3616 input_line_pointer
++;
3619 if (ISPRINT (*input_line_pointer
))
3620 as_bad (_("junk at end of line, first unrecognized character is `%c'"),
3621 *input_line_pointer
);
3623 as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
3624 *input_line_pointer
);
3625 ignore_rest_of_line ();
3628 /* Return pointing just after end-of-line. */
3629 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3632 /* Silently advance to the end of line. Use this after already having
3633 issued an error about something bad. */
3636 ignore_rest_of_line (void)
3638 while (input_line_pointer
< buffer_limit
3639 && !is_end_of_line
[(unsigned char) *input_line_pointer
])
3640 input_line_pointer
++;
3642 input_line_pointer
++;
3644 /* Return pointing just after end-of-line. */
3645 know (is_end_of_line
[(unsigned char) input_line_pointer
[-1]]);
3648 /* Sets frag for given symbol to zero_address_frag, except when the
3649 symbol frag is already set to a dummy listing frag. */
3652 set_zero_frag (symbolS
*symbolP
)
3654 if (symbol_get_frag (symbolP
)->fr_type
!= rs_dummy
)
3655 symbol_set_frag (symbolP
, &zero_address_frag
);
3658 /* In: Pointer to a symbol.
3659 Input_line_pointer->expression.
3661 Out: Input_line_pointer->just after any whitespace after expression.
3662 Tried to set symbol to value of expression.
3663 Will change symbols type, value, and frag; */
3666 pseudo_set (symbolS
*symbolP
)
3671 know (symbolP
); /* NULL pointer is logic error. */
3673 if (!S_IS_FORWARD_REF (symbolP
))
3674 (void) expression (&exp
);
3676 (void) deferred_expression (&exp
);
3678 if (exp
.X_op
== O_illegal
)
3679 as_bad (_("illegal expression"));
3680 else if (exp
.X_op
== O_absent
)
3681 as_bad (_("missing expression"));
3682 else if (exp
.X_op
== O_big
)
3684 if (exp
.X_add_number
> 0)
3685 as_bad (_("bignum invalid"));
3687 as_bad (_("floating point number invalid"));
3689 else if (exp
.X_op
== O_subtract
3690 && !S_IS_FORWARD_REF (symbolP
)
3691 && SEG_NORMAL (S_GET_SEGMENT (exp
.X_add_symbol
))
3692 && (symbol_get_frag (exp
.X_add_symbol
)
3693 == symbol_get_frag (exp
.X_op_symbol
)))
3695 exp
.X_op
= O_constant
;
3696 exp
.X_add_number
= (S_GET_VALUE (exp
.X_add_symbol
)
3697 - S_GET_VALUE (exp
.X_op_symbol
));
3700 if (symbol_section_p (symbolP
))
3702 as_bad ("attempt to set value of section symbol");
3711 exp
.X_add_number
= 0;
3714 S_SET_SEGMENT (symbolP
, absolute_section
);
3715 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3716 set_zero_frag (symbolP
);
3720 #ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
3721 if (S_IS_EXTERNAL (symbolP
))
3723 as_bad ("can't equate global symbol `%s' with register name",
3724 S_GET_NAME (symbolP
));
3728 S_SET_SEGMENT (symbolP
, reg_section
);
3729 S_SET_VALUE (symbolP
, (valueT
) exp
.X_add_number
);
3730 set_zero_frag (symbolP
);
3731 symbol_get_value_expression (symbolP
)->X_op
= O_register
;
3735 seg
= S_GET_SEGMENT (exp
.X_add_symbol
);
3736 /* For x=undef+const, create an expression symbol.
3737 For x=x+const, just update x except when x is an undefined symbol
3738 For x=defined+const, evaluate x. */
3739 if (symbolP
== exp
.X_add_symbol
3740 && (seg
!= undefined_section
3741 || !symbol_constant_p (symbolP
)))
3743 *symbol_X_add_number (symbolP
) += exp
.X_add_number
;
3746 else if (!S_IS_FORWARD_REF (symbolP
) && seg
!= undefined_section
)
3748 symbolS
*s
= exp
.X_add_symbol
;
3750 if (S_IS_COMMON (s
))
3751 as_bad (_("`%s' can't be equated to common symbol '%s'"),
3752 S_GET_NAME (symbolP
), S_GET_NAME (s
));
3754 S_SET_SEGMENT (symbolP
, seg
);
3755 S_SET_VALUE (symbolP
, exp
.X_add_number
+ S_GET_VALUE (s
));
3756 symbol_set_frag (symbolP
, symbol_get_frag (s
));
3757 copy_symbol_attributes (symbolP
, s
);
3760 S_SET_SEGMENT (symbolP
, undefined_section
);
3761 symbol_set_value_expression (symbolP
, &exp
);
3762 copy_symbol_attributes (symbolP
, exp
.X_add_symbol
);
3763 set_zero_frag (symbolP
);
3767 /* The value is some complex expression. */
3768 S_SET_SEGMENT (symbolP
, expr_section
);
3769 symbol_set_value_expression (symbolP
, &exp
);
3770 set_zero_frag (symbolP
);
3777 CONStruct more frag of .bytes, or .words etc.
3778 Should need_pass_2 be 1 then emit no frag(s).
3779 This understands EXPRESSIONS.
3783 This has a split personality. We use expression() to read the
3784 value. We can detect if the value won't fit in a byte or word.
3785 But we can't detect if expression() discarded significant digits
3786 in the case of a long. Not worth the crocks required to fix it. */
3788 /* Select a parser for cons expressions. */
3790 /* Some targets need to parse the expression in various fancy ways.
3791 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3792 (for example, the HPPA does this). Otherwise, you can define
3793 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3794 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3795 are defined, which is the normal case, then only simple expressions
3800 parse_mri_cons (expressionS
*exp
, unsigned int nbytes
);
3803 #ifndef TC_PARSE_CONS_EXPRESSION
3804 #ifdef BITFIELD_CONS_EXPRESSIONS
3805 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3807 parse_bitfield_cons (expressionS
*exp
, unsigned int nbytes
);
3809 #ifdef REPEAT_CONS_EXPRESSIONS
3810 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3812 parse_repeat_cons (expressionS
*exp
, unsigned int nbytes
);
3815 /* If we haven't gotten one yet, just call expression. */
3816 #ifndef TC_PARSE_CONS_EXPRESSION
3817 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3822 do_parse_cons_expression (expressionS
*exp
,
3823 int nbytes ATTRIBUTE_UNUSED
)
3825 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
3829 /* Worker to do .byte etc statements.
3830 Clobbers input_line_pointer and checks end-of-line. */
3833 cons_worker (int nbytes
, /* 1=.byte, 2=.word, 4=.long. */
3841 #ifdef md_flush_pending_output
3842 md_flush_pending_output ();
3846 stop
= mri_comment_field (&stopc
);
3848 if (is_it_end_of_statement ())
3850 demand_empty_rest_of_line ();
3852 mri_comment_end (stop
, stopc
);
3856 #ifdef TC_ADDRESS_BYTES
3858 nbytes
= TC_ADDRESS_BYTES ();
3861 #ifdef md_cons_align
3862 md_cons_align (nbytes
);
3870 parse_mri_cons (&exp
, (unsigned int) nbytes
);
3874 if (*input_line_pointer
== '"')
3876 as_bad (_("unexpected `\"' in expression"));
3877 ignore_rest_of_line ();
3880 TC_PARSE_CONS_EXPRESSION (&exp
, (unsigned int) nbytes
);
3885 if (exp
.X_op
== O_symbol
)
3886 exp
.X_op
= O_symbol_rva
;
3888 as_fatal (_("rva without symbol"));
3890 emit_expr (&exp
, (unsigned int) nbytes
);
3893 while (*input_line_pointer
++ == ',');
3895 /* In MRI mode, after an odd number of bytes, we must align to an
3896 even word boundary, unless the next instruction is a dc.b, ds.b
3898 if (flag_mri
&& nbytes
== 1 && (c
& 1) != 0)
3899 mri_pending_align
= 1;
3901 input_line_pointer
--; /* Put terminator back into stream. */
3903 demand_empty_rest_of_line ();
3906 mri_comment_end (stop
, stopc
);
3912 cons_worker (size
, 0);
3918 cons_worker (size
, 1);
3921 /* .reloc offset, reloc_name, symbol+addend. */
3924 s_reloc (int ignore ATTRIBUTE_UNUSED
)
3931 struct reloc_list
*reloc
;
3933 reloc
= (struct reloc_list
*) xmalloc (sizeof (*reloc
));
3936 stop
= mri_comment_field (&stopc
);
3945 as_bad (_("missing or bad offset expression"));
3948 exp
.X_add_symbol
= section_symbol (now_seg
);
3949 exp
.X_op
= O_symbol
;
3952 if (exp
.X_add_number
== 0)
3954 reloc
->u
.a
.offset_sym
= exp
.X_add_symbol
;
3959 reloc
->u
.a
.offset_sym
= make_expr_symbol (&exp
);
3964 if (*input_line_pointer
!= ',')
3966 as_bad (_("missing reloc type"));
3970 ++input_line_pointer
;
3972 r_name
= input_line_pointer
;
3973 c
= get_symbol_end ();
3974 reloc
->u
.a
.howto
= bfd_reloc_name_lookup (stdoutput
, r_name
);
3975 *input_line_pointer
= c
;
3976 if (reloc
->u
.a
.howto
== NULL
)
3978 as_bad (_("unrecognized reloc type"));
3982 exp
.X_op
= O_absent
;
3984 if (*input_line_pointer
== ',')
3986 ++input_line_pointer
;
3994 as_bad (_("bad reloc expression"));
3996 ignore_rest_of_line ();
3999 mri_comment_end (stop
, stopc
);
4002 reloc
->u
.a
.sym
= NULL
;
4003 reloc
->u
.a
.addend
= 0;
4006 reloc
->u
.a
.sym
= NULL
;
4007 reloc
->u
.a
.addend
= exp
.X_add_number
;
4010 reloc
->u
.a
.sym
= exp
.X_add_symbol
;
4011 reloc
->u
.a
.addend
= exp
.X_add_number
;
4014 reloc
->u
.a
.sym
= make_expr_symbol (&exp
);
4015 reloc
->u
.a
.addend
= 0;
4019 as_where (&reloc
->file
, &reloc
->line
);
4020 reloc
->next
= reloc_list
;
4023 demand_empty_rest_of_line ();
4025 mri_comment_end (stop
, stopc
);
4028 /* Put the contents of expression EXP into the object file using
4029 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
4032 emit_expr (expressionS
*exp
, unsigned int nbytes
)
4036 valueT extra_digit
= 0;
4038 /* Don't do anything if we are going to make another pass. */
4042 /* Grow the current frag now so that dot_value does not get invalidated
4043 if the frag were to fill up in the frag_more() call below. */
4045 dot_value
= frag_now_fix ();
4049 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
4050 appear as a four byte positive constant in the .line section,
4051 followed by a 2 byte 0xffff. Look for that case here. */
4053 static int dwarf_line
= -1;
4055 if (strcmp (segment_name (now_seg
), ".line") != 0)
4057 else if (dwarf_line
>= 0
4059 && exp
->X_op
== O_constant
4060 && (exp
->X_add_number
== -1 || exp
->X_add_number
== 0xffff))
4061 listing_source_line ((unsigned int) dwarf_line
);
4062 else if (nbytes
== 4
4063 && exp
->X_op
== O_constant
4064 && exp
->X_add_number
>= 0)
4065 dwarf_line
= exp
->X_add_number
;
4070 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
4071 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
4072 AT_sibling (0x12) followed by a four byte address of the sibling
4073 followed by a 2 byte AT_name (0x38) followed by the name of the
4074 file. We look for that case here. */
4076 static int dwarf_file
= 0;
4078 if (strcmp (segment_name (now_seg
), ".debug") != 0)
4080 else if (dwarf_file
== 0
4082 && exp
->X_op
== O_constant
4083 && exp
->X_add_number
== 0x11)
4085 else if (dwarf_file
== 1
4087 && exp
->X_op
== O_constant
4088 && exp
->X_add_number
== 0x12)
4090 else if (dwarf_file
== 2
4093 else if (dwarf_file
== 3
4095 && exp
->X_op
== O_constant
4096 && exp
->X_add_number
== 0x38)
4101 /* The variable dwarf_file_string tells stringer that the string
4102 may be the name of the source file. */
4103 if (dwarf_file
== 4)
4104 dwarf_file_string
= 1;
4106 dwarf_file_string
= 0;
4111 if (check_eh_frame (exp
, &nbytes
))
4116 /* Allow `.word 0' in the absolute section. */
4117 if (now_seg
== absolute_section
)
4119 if (op
!= O_constant
|| exp
->X_add_number
!= 0)
4120 as_bad (_("attempt to store value in absolute section"));
4121 abs_section_offset
+= nbytes
;
4125 /* Handle a negative bignum. */
4127 && exp
->X_add_number
== 0
4128 && symbol_get_value_expression (exp
->X_add_symbol
)->X_op
== O_big
4129 && symbol_get_value_expression (exp
->X_add_symbol
)->X_add_number
> 0)
4132 unsigned long carry
;
4134 exp
= symbol_get_value_expression (exp
->X_add_symbol
);
4136 /* Negate the bignum: one's complement each digit and add 1. */
4138 for (i
= 0; i
< exp
->X_add_number
; i
++)
4142 next
= (((~(generic_bignum
[i
] & LITTLENUM_MASK
))
4145 generic_bignum
[i
] = next
& LITTLENUM_MASK
;
4146 carry
= next
>> LITTLENUM_NUMBER_OF_BITS
;
4149 /* We can ignore any carry out, because it will be handled by
4150 extra_digit if it is needed. */
4152 extra_digit
= (valueT
) -1;
4156 if (op
== O_absent
|| op
== O_illegal
)
4158 as_warn (_("zero assumed for missing expression"));
4159 exp
->X_add_number
= 0;
4162 else if (op
== O_big
&& exp
->X_add_number
<= 0)
4164 as_bad (_("floating point number invalid"));
4165 exp
->X_add_number
= 0;
4168 else if (op
== O_register
)
4170 as_warn (_("register value used as expression"));
4174 p
= frag_more ((int) nbytes
);
4176 #ifndef WORKING_DOT_WORD
4177 /* If we have the difference of two symbols in a word, save it on
4178 the broken_words list. See the code in write.c. */
4179 if (op
== O_subtract
&& nbytes
== 2)
4181 struct broken_word
*x
;
4183 x
= (struct broken_word
*) xmalloc (sizeof (struct broken_word
));
4184 x
->next_broken_word
= broken_words
;
4187 x
->subseg
= now_subseg
;
4189 x
->word_goes_here
= p
;
4191 x
->add
= exp
->X_add_symbol
;
4192 x
->sub
= exp
->X_op_symbol
;
4193 x
->addnum
= exp
->X_add_number
;
4201 /* If we have an integer, but the number of bytes is too large to
4202 pass to md_number_to_chars, handle it as a bignum. */
4203 if (op
== O_constant
&& nbytes
> sizeof (valueT
))
4205 extra_digit
= exp
->X_unsigned
? 0 : -1;
4206 convert_to_bignum (exp
);
4210 if (op
== O_constant
)
4218 /* JF << of >= number of bits in the object is undefined. In
4219 particular SPARC (Sun 4) has problems. */
4220 if (nbytes
>= sizeof (valueT
))
4223 if (nbytes
> sizeof (valueT
))
4226 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
4230 /* Don't store these bits. */
4231 mask
= ~(valueT
) 0 << (BITS_PER_CHAR
* nbytes
);
4232 hibit
= (valueT
) 1 << (nbytes
* BITS_PER_CHAR
- 1);
4235 unmask
= ~mask
; /* Do store these bits. */
4238 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
4239 mask
= ~(unmask
>> 1); /* Includes sign bit now. */
4242 get
= exp
->X_add_number
;
4244 if ((get
& mask
) != 0
4245 && ((get
& mask
) != mask
4246 || (get
& hibit
) == 0))
4247 { /* Leading bits contain both 0s & 1s. */
4248 #if defined (BFD64) && BFD_HOST_64BIT_LONG_LONG
4250 as_warn (_("value 0x%llx truncated to 0x%llx"),
4251 (unsigned long long) get
, (unsigned long long) use
);
4253 as_warn (_("value 0x%I64x truncated to 0x%I64x"),
4254 (unsigned long long) get
, (unsigned long long) use
);
4257 as_warn (_("value 0x%lx truncated to 0x%lx"),
4258 (unsigned long) get
, (unsigned long) use
);
4261 /* Put bytes in right order. */
4262 md_number_to_chars (p
, use
, (int) nbytes
);
4264 else if (op
== O_big
)
4267 LITTLENUM_TYPE
*nums
;
4269 size
= exp
->X_add_number
* CHARS_PER_LITTLENUM
;
4272 int i
= nbytes
/ CHARS_PER_LITTLENUM
;
4275 LITTLENUM_TYPE sign
= 0;
4276 if ((generic_bignum
[--i
]
4277 & (1 << (LITTLENUM_NUMBER_OF_BITS
- 1))) != 0)
4278 sign
= ~(LITTLENUM_TYPE
) 0;
4279 while (++i
< exp
->X_add_number
)
4280 if (generic_bignum
[i
] != sign
)
4283 if (i
< exp
->X_add_number
)
4284 as_warn (_("bignum truncated to %d bytes"), nbytes
);
4290 md_number_to_chars (p
, (valueT
) generic_bignum
[0], 1);
4293 know (nbytes
% CHARS_PER_LITTLENUM
== 0);
4295 if (target_big_endian
)
4297 while (nbytes
> size
)
4299 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4300 nbytes
-= CHARS_PER_LITTLENUM
;
4301 p
+= CHARS_PER_LITTLENUM
;
4304 nums
= generic_bignum
+ size
/ CHARS_PER_LITTLENUM
;
4305 while (size
>= CHARS_PER_LITTLENUM
)
4308 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4309 size
-= CHARS_PER_LITTLENUM
;
4310 p
+= CHARS_PER_LITTLENUM
;
4315 nums
= generic_bignum
;
4316 while (size
>= CHARS_PER_LITTLENUM
)
4318 md_number_to_chars (p
, (valueT
) *nums
, CHARS_PER_LITTLENUM
);
4320 size
-= CHARS_PER_LITTLENUM
;
4321 p
+= CHARS_PER_LITTLENUM
;
4322 nbytes
-= CHARS_PER_LITTLENUM
;
4325 while (nbytes
>= CHARS_PER_LITTLENUM
)
4327 md_number_to_chars (p
, extra_digit
, CHARS_PER_LITTLENUM
);
4328 nbytes
-= CHARS_PER_LITTLENUM
;
4329 p
+= CHARS_PER_LITTLENUM
;
4334 emit_expr_fix (exp
, nbytes
, frag_now
, p
);
4338 emit_expr_fix (expressionS
*exp
, unsigned int nbytes
, fragS
*frag
, char *p
)
4340 memset (p
, 0, nbytes
);
4342 /* Generate a fixS to record the symbol value. */
4344 #ifdef TC_CONS_FIX_NEW
4345 TC_CONS_FIX_NEW (frag
, p
- frag
->fr_literal
, nbytes
, exp
);
4348 bfd_reloc_code_real_type r
;
4368 as_bad (_("unsupported BFD relocation size %u"), nbytes
);
4372 fix_new_exp (frag
, p
- frag
->fr_literal
, (int) nbytes
, exp
,
4378 #ifdef BITFIELD_CONS_EXPRESSIONS
4380 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
4381 w:x,y:z, where w and y are bitwidths and x and y are values. They
4382 then pack them all together. We do a little better in that we allow
4383 them in words, longs, etc. and we'll pack them in target byte order
4386 The rules are: pack least significant bit first, if a field doesn't
4387 entirely fit, put it in the next unit. Overflowing the bitfield is
4388 explicitly *not* even a warning. The bitwidth should be considered
4391 To use this function the tc-XXX.h file should define
4392 BITFIELD_CONS_EXPRESSIONS. */
4395 parse_bitfield_cons (exp
, nbytes
)
4397 unsigned int nbytes
;
4399 unsigned int bits_available
= BITS_PER_CHAR
* nbytes
;
4400 char *hold
= input_line_pointer
;
4402 (void) expression (exp
);
4404 if (*input_line_pointer
== ':')
4411 unsigned long width
;
4413 if (*input_line_pointer
!= ':')
4415 input_line_pointer
= hold
;
4417 } /* Next piece is not a bitfield. */
4419 /* In the general case, we can't allow
4420 full expressions with symbol
4421 differences and such. The relocation
4422 entries for symbols not defined in this
4423 assembly would require arbitrary field
4424 widths, positions, and masks which most
4425 of our current object formats don't
4428 In the specific case where a symbol
4429 *is* defined in this assembly, we
4430 *could* build fixups and track it, but
4431 this could lead to confusion for the
4432 backends. I'm lazy. I'll take any
4433 SEG_ABSOLUTE. I think that means that
4434 you can use a previous .set or
4435 .equ type symbol. xoxorich. */
4437 if (exp
->X_op
== O_absent
)
4439 as_warn (_("using a bit field width of zero"));
4440 exp
->X_add_number
= 0;
4441 exp
->X_op
= O_constant
;
4442 } /* Implied zero width bitfield. */
4444 if (exp
->X_op
!= O_constant
)
4446 *input_line_pointer
= '\0';
4447 as_bad (_("field width \"%s\" too complex for a bitfield"), hold
);
4448 *input_line_pointer
= ':';
4449 demand_empty_rest_of_line ();
4451 } /* Too complex. */
4453 if ((width
= exp
->X_add_number
) > (BITS_PER_CHAR
* nbytes
))
4455 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
4456 width
, nbytes
, (BITS_PER_CHAR
* nbytes
));
4457 width
= BITS_PER_CHAR
* nbytes
;
4460 if (width
> bits_available
)
4462 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
4463 input_line_pointer
= hold
;
4464 exp
->X_add_number
= value
;
4469 hold
= ++input_line_pointer
;
4471 (void) expression (exp
);
4472 if (exp
->X_op
!= O_constant
)
4474 char cache
= *input_line_pointer
;
4476 *input_line_pointer
= '\0';
4477 as_bad (_("field value \"%s\" too complex for a bitfield"), hold
);
4478 *input_line_pointer
= cache
;
4479 demand_empty_rest_of_line ();
4481 } /* Too complex. */
4483 value
|= ((~(-1 << width
) & exp
->X_add_number
)
4484 << ((BITS_PER_CHAR
* nbytes
) - bits_available
));
4486 if ((bits_available
-= width
) == 0
4487 || is_it_end_of_statement ()
4488 || *input_line_pointer
!= ',')
4491 } /* All the bitfields we're gonna get. */
4493 hold
= ++input_line_pointer
;
4494 (void) expression (exp
);
4497 exp
->X_add_number
= value
;
4498 exp
->X_op
= O_constant
;
4499 exp
->X_unsigned
= 1;
4503 #endif /* BITFIELD_CONS_EXPRESSIONS */
4505 /* Handle an MRI style string expression. */
4509 parse_mri_cons (exp
, nbytes
)
4511 unsigned int nbytes
;
4513 if (*input_line_pointer
!= '\''
4514 && (input_line_pointer
[1] != '\''
4515 || (*input_line_pointer
!= 'A'
4516 && *input_line_pointer
!= 'E')))
4517 TC_PARSE_CONS_EXPRESSION (exp
, nbytes
);
4521 unsigned int result
= 0;
4523 /* An MRI style string. Cut into as many bytes as will fit into
4524 a nbyte chunk, left justify if necessary, and separate with
4525 commas so we can try again later. */
4526 if (*input_line_pointer
== 'A')
4527 ++input_line_pointer
;
4528 else if (*input_line_pointer
== 'E')
4530 as_bad (_("EBCDIC constants are not supported"));
4531 ++input_line_pointer
;
4534 input_line_pointer
++;
4535 for (scan
= 0; scan
< nbytes
; scan
++)
4537 if (*input_line_pointer
== '\'')
4539 if (input_line_pointer
[1] == '\'')
4541 input_line_pointer
++;
4546 result
= (result
<< 8) | (*input_line_pointer
++);
4550 while (scan
< nbytes
)
4556 /* Create correct expression. */
4557 exp
->X_op
= O_constant
;
4558 exp
->X_add_number
= result
;
4560 /* Fake it so that we can read the next char too. */
4561 if (input_line_pointer
[0] != '\'' ||
4562 (input_line_pointer
[0] == '\'' && input_line_pointer
[1] == '\''))
4564 input_line_pointer
-= 2;
4565 input_line_pointer
[0] = ',';
4566 input_line_pointer
[1] = '\'';
4569 input_line_pointer
++;
4572 #endif /* TC_M68K */
4574 #ifdef REPEAT_CONS_EXPRESSIONS
4576 /* Parse a repeat expression for cons. This is used by the MIPS
4577 assembler. The format is NUMBER:COUNT; NUMBER appears in the
4578 object file COUNT times.
4580 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
4583 parse_repeat_cons (exp
, nbytes
)
4585 unsigned int nbytes
;
4592 if (*input_line_pointer
!= ':')
4594 /* No repeat count. */
4598 ++input_line_pointer
;
4599 expression (&count
);
4600 if (count
.X_op
!= O_constant
4601 || count
.X_add_number
<= 0)
4603 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4607 /* The cons function is going to output this expression once. So we
4608 output it count - 1 times. */
4609 for (i
= count
.X_add_number
- 1; i
> 0; i
--)
4610 emit_expr (exp
, nbytes
);
4613 #endif /* REPEAT_CONS_EXPRESSIONS */
4615 /* Parse a floating point number represented as a hex constant. This
4616 permits users to specify the exact bits they want in the floating
4620 hex_float (int float_type
, char *bytes
)
4652 as_bad (_("unknown floating type type '%c'"), float_type
);
4656 /* It would be nice if we could go through expression to parse the
4657 hex constant, but if we get a bignum it's a pain to sort it into
4658 the buffer correctly. */
4660 while (hex_p (*input_line_pointer
) || *input_line_pointer
== '_')
4664 /* The MRI assembler accepts arbitrary underscores strewn about
4665 through the hex constant, so we ignore them as well. */
4666 if (*input_line_pointer
== '_')
4668 ++input_line_pointer
;
4674 as_warn (_("floating point constant too large"));
4677 d
= hex_value (*input_line_pointer
) << 4;
4678 ++input_line_pointer
;
4679 while (*input_line_pointer
== '_')
4680 ++input_line_pointer
;
4681 if (hex_p (*input_line_pointer
))
4683 d
+= hex_value (*input_line_pointer
);
4684 ++input_line_pointer
;
4686 if (target_big_endian
)
4689 bytes
[length
- i
- 1] = d
;
4695 if (target_big_endian
)
4696 memset (bytes
+ i
, 0, length
- i
);
4698 memset (bytes
, 0, length
- i
);
4706 CONStruct some more frag chars of .floats .ffloats etc.
4707 Makes 0 or more new frags.
4708 If need_pass_2 == 1, no frags are emitted.
4709 This understands only floating literals, not expressions. Sorry.
4711 A floating constant is defined by atof_generic(), except it is preceded
4712 by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4713 reading, I decided to be incompatible. This always tries to give you
4714 rounded bits to the precision of the pseudo-op. Former AS did premature
4715 truncation, restored noisy bits instead of trailing 0s AND gave you
4716 a choice of 2 flavours of noise according to which of 2 floating-point
4717 scanners you directed AS to use.
4719 In: input_line_pointer->whitespace before, or '0' of flonum. */
4722 float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
4723 int float_type
/* 'f':.ffloat ... 'F':.float ... */)
4726 int length
; /* Number of chars in an object. */
4727 char *err
; /* Error from scanning floating literal. */
4728 char temp
[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
];
4730 if (is_it_end_of_statement ())
4732 demand_empty_rest_of_line ();
4736 #ifdef md_flush_pending_output
4737 md_flush_pending_output ();
4740 #ifdef md_cons_align
4746 /* input_line_pointer->1st char of a flonum (we hope!). */
4749 /* Skip any 0{letter} that may be present. Don't even check if the
4750 letter is legal. Someone may invent a "z" format and this routine
4751 has no use for such information. Lusers beware: you get
4752 diagnostics if your input is ill-conditioned. */
4753 if (input_line_pointer
[0] == '0'
4754 && ISALPHA (input_line_pointer
[1]))
4755 input_line_pointer
+= 2;
4757 /* Accept :xxxx, where the x's are hex digits, for a floating
4758 point with the exact digits specified. */
4759 if (input_line_pointer
[0] == ':')
4761 ++input_line_pointer
;
4762 length
= hex_float (float_type
, temp
);
4765 ignore_rest_of_line ();
4771 err
= md_atof (float_type
, temp
, &length
);
4772 know (length
<= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT
);
4773 know (err
!= NULL
|| length
> 0);
4776 as_bad (_("bad floating literal: %s"), err
);
4777 ignore_rest_of_line ();
4788 #ifdef REPEAT_CONS_EXPRESSIONS
4789 if (*input_line_pointer
== ':')
4791 expressionS count_exp
;
4793 ++input_line_pointer
;
4794 expression (&count_exp
);
4796 if (count_exp
.X_op
!= O_constant
4797 || count_exp
.X_add_number
<= 0)
4798 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4800 count
= count_exp
.X_add_number
;
4804 while (--count
>= 0)
4806 p
= frag_more (length
);
4807 memcpy (p
, temp
, (unsigned int) length
);
4812 while (*input_line_pointer
++ == ',');
4814 /* Put terminator back into stream. */
4815 --input_line_pointer
;
4816 demand_empty_rest_of_line ();
4819 /* Return the size of a LEB128 value. */
4822 sizeof_sleb128 (offsetT value
)
4829 byte
= (value
& 0x7f);
4830 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4831 Fortunately, we can structure things so that the extra work reduces
4832 to a noop on systems that do things "properly". */
4833 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4836 while (!(((value
== 0) && ((byte
& 0x40) == 0))
4837 || ((value
== -1) && ((byte
& 0x40) != 0))));
4843 sizeof_uleb128 (valueT value
)
4858 sizeof_leb128 (valueT value
, int sign
)
4861 return sizeof_sleb128 ((offsetT
) value
);
4863 return sizeof_uleb128 (value
);
4866 /* Output a LEB128 value. */
4869 output_sleb128 (char *p
, offsetT value
)
4876 unsigned byte
= (value
& 0x7f);
4878 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4879 Fortunately, we can structure things so that the extra work reduces
4880 to a noop on systems that do things "properly". */
4881 value
= (value
>> 7) | ~(-(offsetT
)1 >> 7);
4883 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
4884 || ((value
== -1) && ((byte
& 0x40) != 0))));
4896 output_uleb128 (char *p
, valueT value
)
4902 unsigned byte
= (value
& 0x7f);
4905 /* More bytes to follow. */
4916 output_leb128 (char *p
, valueT value
, int sign
)
4919 return output_sleb128 (p
, (offsetT
) value
);
4921 return output_uleb128 (p
, value
);
4924 /* Do the same for bignums. We combine sizeof with output here in that
4925 we don't output for NULL values of P. It isn't really as critical as
4926 for "normal" values that this be streamlined. */
4929 output_big_sleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4936 /* Strip leading sign extensions off the bignum. */
4938 && bignum
[size
- 1] == LITTLENUM_MASK
4939 && bignum
[size
- 2] > LITTLENUM_MASK
/ 2)
4944 /* OR in the next part of the littlenum. */
4945 val
|= (*bignum
<< loaded
);
4946 loaded
+= LITTLENUM_NUMBER_OF_BITS
;
4950 /* Add bytes until there are less than 7 bits left in VAL
4951 or until every non-sign bit has been written. */
4958 || val
!= ((byte
& 0x40) == 0 ? 0 : ((valueT
) 1 << loaded
) - 1))
4965 while ((byte
& 0x80) != 0 && loaded
>= 7);
4969 /* Mop up any left-over bits (of which there will be less than 7). */
4970 if ((byte
& 0x80) != 0)
4972 /* Sign-extend VAL. */
4973 if (val
& (1 << (loaded
- 1)))
4974 val
|= ~0 << loaded
;
4984 output_big_uleb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
)
4991 /* Strip leading zeros off the bignum. */
4992 /* XXX: Is this needed? */
4993 while (size
> 0 && bignum
[size
- 1] == 0)
4998 if (loaded
< 7 && size
> 0)
5000 val
|= (*bignum
<< loaded
);
5001 loaded
+= 8 * CHARS_PER_LITTLENUM
;
5010 if (size
> 0 || val
)
5017 while (byte
& 0x80);
5023 output_big_leb128 (char *p
, LITTLENUM_TYPE
*bignum
, int size
, int sign
)
5026 return output_big_sleb128 (p
, bignum
, size
);
5028 return output_big_uleb128 (p
, bignum
, size
);
5031 /* Generate the appropriate fragments for a given expression to emit a
5035 emit_leb128_expr (expressionS
*exp
, int sign
)
5037 operatorT op
= exp
->X_op
;
5038 unsigned int nbytes
;
5040 if (op
== O_absent
|| op
== O_illegal
)
5042 as_warn (_("zero assumed for missing expression"));
5043 exp
->X_add_number
= 0;
5046 else if (op
== O_big
&& exp
->X_add_number
<= 0)
5048 as_bad (_("floating point number invalid"));
5049 exp
->X_add_number
= 0;
5052 else if (op
== O_register
)
5054 as_warn (_("register value used as expression"));
5057 else if (op
== O_constant
5059 && (exp
->X_add_number
< 0) != !exp
->X_unsigned
)
5061 /* We're outputting a signed leb128 and the sign of X_add_number
5062 doesn't reflect the sign of the original value. Convert EXP
5063 to a correctly-extended bignum instead. */
5064 convert_to_bignum (exp
);
5068 /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
5069 a signal that this is leb128 data. It shouldn't optimize this away. */
5070 nbytes
= (unsigned int) -1;
5071 if (check_eh_frame (exp
, &nbytes
))
5074 /* Let the backend know that subsequent data may be byte aligned. */
5075 #ifdef md_cons_align
5079 if (op
== O_constant
)
5081 /* If we've got a constant, emit the thing directly right now. */
5083 valueT value
= exp
->X_add_number
;
5087 size
= sizeof_leb128 (value
, sign
);
5088 p
= frag_more (size
);
5089 output_leb128 (p
, value
, sign
);
5091 else if (op
== O_big
)
5093 /* O_big is a different sort of constant. */
5098 size
= output_big_leb128 (NULL
, generic_bignum
, exp
->X_add_number
, sign
);
5099 p
= frag_more (size
);
5100 output_big_leb128 (p
, generic_bignum
, exp
->X_add_number
, sign
);
5104 /* Otherwise, we have to create a variable sized fragment and
5105 resolve things later. */
5107 frag_var (rs_leb128
, sizeof_uleb128 (~(valueT
) 0), 0, sign
,
5108 make_expr_symbol (exp
), 0, (char *) NULL
);
5112 /* Parse the .sleb128 and .uleb128 pseudos. */
5119 #ifdef md_flush_pending_output
5120 md_flush_pending_output ();
5126 emit_leb128_expr (&exp
, sign
);
5128 while (*input_line_pointer
++ == ',');
5130 input_line_pointer
--;
5131 demand_empty_rest_of_line ();
5135 stringer_append_char (int c
, int bitsize
)
5137 if (!target_big_endian
)
5138 FRAG_APPEND_1_CHAR (c
);
5143 FRAG_APPEND_1_CHAR (0);
5144 FRAG_APPEND_1_CHAR (0);
5145 FRAG_APPEND_1_CHAR (0);
5146 FRAG_APPEND_1_CHAR (0);
5149 FRAG_APPEND_1_CHAR (0);
5150 FRAG_APPEND_1_CHAR (0);
5153 FRAG_APPEND_1_CHAR (0);
5158 /* Called with invalid bitsize argument. */
5162 if (target_big_endian
)
5163 FRAG_APPEND_1_CHAR (c
);
5166 /* Worker to do .ascii etc statements.
5167 Reads 0 or more ',' separated, double-quoted strings.
5168 Caller should have checked need_pass_2 is FALSE because we don't
5170 Checks for end-of-line.
5171 BITS_APPENDZERO says how many bits are in a target char.
5172 The bottom bit is set if a NUL char should be appended to the strings. */
5175 stringer (int bits_appendzero
)
5177 const int bitsize
= bits_appendzero
& ~7;
5178 const int append_zero
= bits_appendzero
& 1;
5180 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5184 #ifdef md_flush_pending_output
5185 md_flush_pending_output ();
5188 #ifdef md_cons_align
5192 /* The following awkward logic is to parse ZERO or more strings,
5193 comma separated. Recall a string expression includes spaces
5194 before the opening '\"' and spaces after the closing '\"'.
5195 We fake a leading ',' if there is (supposed to be)
5196 a 1st, expression. We keep demanding expressions for each ','. */
5197 if (is_it_end_of_statement ())
5199 c
= 0; /* Skip loop. */
5200 ++input_line_pointer
; /* Compensate for end of loop. */
5204 c
= ','; /* Do loop. */
5206 /* If we have been switched into the abs_section then we
5207 will not have an obstack onto which we can hang strings. */
5208 if (now_seg
== absolute_section
)
5210 as_bad (_("strings must be placed into a section"));
5212 ignore_rest_of_line ();
5215 while (c
== ',' || c
== '<' || c
== '"')
5218 switch (*input_line_pointer
)
5221 ++input_line_pointer
; /*->1st char of string. */
5222 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5223 start
= input_line_pointer
;
5226 while (is_a_char (c
= next_char_of_string ()))
5227 stringer_append_char (c
, bitsize
);
5230 stringer_append_char (0, bitsize
);
5232 know (input_line_pointer
[-1] == '\"');
5234 #if !defined(NO_LISTING) && defined (OBJ_ELF)
5235 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
5236 will emit .string with a filename in the .debug section
5237 after a sequence of constants. See the comment in
5238 emit_expr for the sequence. emit_expr will set
5239 dwarf_file_string to non-zero if this string might be a
5240 source file name. */
5241 if (strcmp (segment_name (now_seg
), ".debug") != 0)
5242 dwarf_file_string
= 0;
5243 else if (dwarf_file_string
)
5245 c
= input_line_pointer
[-1];
5246 input_line_pointer
[-1] = '\0';
5247 listing_source_file (start
);
5248 input_line_pointer
[-1] = c
;
5254 input_line_pointer
++;
5255 c
= get_single_number ();
5256 stringer_append_char (c
, bitsize
);
5257 if (*input_line_pointer
!= '>')
5258 as_bad (_("expected <nn>"));
5260 input_line_pointer
++;
5263 input_line_pointer
++;
5267 c
= *input_line_pointer
;
5270 demand_empty_rest_of_line ();
5273 /* FIXME-SOMEDAY: I had trouble here on characters with the
5274 high bits set. We'll probably also have trouble with
5275 multibyte chars, wide chars, etc. Also be careful about
5276 returning values bigger than 1 byte. xoxorich. */
5279 next_char_of_string (void)
5283 c
= *input_line_pointer
++ & CHAR_MASK
;
5291 as_warn (_("unterminated string; newline inserted"));
5292 bump_line_counters ();
5295 #ifndef NO_STRING_ESCAPES
5297 switch (c
= *input_line_pointer
++)
5325 break; /* As itself. */
5341 for (i
= 0, number
= 0;
5342 ISDIGIT (c
) && i
< 3;
5343 c
= *input_line_pointer
++, i
++)
5345 number
= number
* 8 + c
- '0';
5350 --input_line_pointer
;
5359 c
= *input_line_pointer
++;
5360 while (ISXDIGIT (c
))
5363 number
= number
* 16 + c
- '0';
5364 else if (ISUPPER (c
))
5365 number
= number
* 16 + c
- 'A' + 10;
5367 number
= number
* 16 + c
- 'a' + 10;
5368 c
= *input_line_pointer
++;
5371 --input_line_pointer
;
5376 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
5377 as_warn (_("unterminated string; newline inserted"));
5379 bump_line_counters ();
5384 #ifdef ONLY_STANDARD_ESCAPES
5385 as_bad (_("bad escaped character in string"));
5387 #endif /* ONLY_STANDARD_ESCAPES */
5392 #endif /* ! defined (NO_STRING_ESCAPES) */
5401 get_segmented_expression (expressionS
*expP
)
5405 retval
= expression (expP
);
5406 if (expP
->X_op
== O_illegal
5407 || expP
->X_op
== O_absent
5408 || expP
->X_op
== O_big
)
5410 as_bad (_("expected address expression"));
5411 expP
->X_op
= O_constant
;
5412 expP
->X_add_number
= 0;
5413 retval
= absolute_section
;
5419 get_known_segmented_expression (expressionS
*expP
)
5421 segT retval
= get_segmented_expression (expP
);
5423 if (retval
== undefined_section
)
5425 /* There is no easy way to extract the undefined symbol from the
5427 if (expP
->X_add_symbol
!= NULL
5428 && S_GET_SEGMENT (expP
->X_add_symbol
) != expr_section
)
5429 as_warn (_("symbol \"%s\" undefined; zero assumed"),
5430 S_GET_NAME (expP
->X_add_symbol
));
5432 as_warn (_("some symbol undefined; zero assumed"));
5433 retval
= absolute_section
;
5434 expP
->X_op
= O_constant
;
5435 expP
->X_add_number
= 0;
5440 char /* Return terminator. */
5441 get_absolute_expression_and_terminator (long *val_pointer
/* Return value of expression. */)
5443 /* FIXME: val_pointer should probably be offsetT *. */
5444 *val_pointer
= (long) get_absolute_expression ();
5445 return (*input_line_pointer
++);
5448 /* Like demand_copy_string, but return NULL if the string contains any '\0's.
5449 Give a warning if that happens. */
5452 demand_copy_C_string (int *len_pointer
)
5456 if ((s
= demand_copy_string (len_pointer
)) != 0)
5460 for (len
= *len_pointer
; len
> 0; len
--)
5467 as_bad (_("this string may not contain \'\\0\'"));
5475 /* Demand string, but return a safe (=private) copy of the string.
5476 Return NULL if we can't read a string here. */
5479 demand_copy_string (int *lenP
)
5487 if (*input_line_pointer
== '\"')
5489 input_line_pointer
++; /* Skip opening quote. */
5491 while (is_a_char (c
= next_char_of_string ()))
5493 obstack_1grow (¬es
, c
);
5496 /* JF this next line is so demand_copy_C_string will return a
5497 null terminated string. */
5498 obstack_1grow (¬es
, '\0');
5499 retval
= (char *) obstack_finish (¬es
);
5503 as_bad (_("missing string"));
5505 ignore_rest_of_line ();
5511 /* In: Input_line_pointer->next character.
5513 Do: Skip input_line_pointer over all whitespace.
5515 Out: 1 if input_line_pointer->end-of-line. */
5518 is_it_end_of_statement (void)
5521 return (is_end_of_line
[(unsigned char) *input_line_pointer
]);
5525 equals (char *sym_name
, int reassign
)
5530 input_line_pointer
++;
5531 if (*input_line_pointer
== '=')
5532 input_line_pointer
++;
5533 if (reassign
< 0 && *input_line_pointer
== '=')
5534 input_line_pointer
++;
5536 while (*input_line_pointer
== ' ' || *input_line_pointer
== '\t')
5537 input_line_pointer
++;
5540 stop
= mri_comment_field (&stopc
);
5542 assign_symbol (sym_name
, reassign
>= 0 ? !reassign
: reassign
);
5546 demand_empty_rest_of_line ();
5547 mri_comment_end (stop
, stopc
);
5551 /* .incbin -- include a file verbatim at the current location. */
5554 s_incbin (int x ATTRIBUTE_UNUSED
)
5565 #ifdef md_flush_pending_output
5566 md_flush_pending_output ();
5569 #ifdef md_cons_align
5574 filename
= demand_copy_string (& len
);
5575 if (filename
== NULL
)
5580 /* Look for optional skip and count. */
5581 if (* input_line_pointer
== ',')
5583 ++ input_line_pointer
;
5584 skip
= get_absolute_expression ();
5588 if (* input_line_pointer
== ',')
5590 ++ input_line_pointer
;
5592 count
= get_absolute_expression ();
5594 as_warn (_(".incbin count zero, ignoring `%s'"), filename
);
5600 demand_empty_rest_of_line ();
5602 /* Try opening absolute path first, then try include dirs. */
5603 binfile
= fopen (filename
, FOPEN_RB
);
5604 if (binfile
== NULL
)
5608 path
= (char *) xmalloc ((unsigned long) len
+ include_dir_maxlen
+ 5);
5610 for (i
= 0; i
< include_dir_count
; i
++)
5612 sprintf (path
, "%s/%s", include_dirs
[i
], filename
);
5614 binfile
= fopen (path
, FOPEN_RB
);
5615 if (binfile
!= NULL
)
5619 if (binfile
== NULL
)
5620 as_bad (_("file not found: %s"), filename
);
5623 path
= xstrdup (filename
);
5629 register_dependency (path
);
5631 /* Compute the length of the file. */
5632 if (fseek (binfile
, 0, SEEK_END
) != 0)
5634 as_bad (_("seek to end of .incbin file failed `%s'"), path
);
5637 file_len
= ftell (binfile
);
5639 /* If a count was not specified use the remainder of the file. */
5641 count
= file_len
- skip
;
5643 if (skip
< 0 || count
< 0 || file_len
< 0 || skip
+ count
> file_len
)
5645 as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
5646 skip
, count
, file_len
);
5650 if (fseek (binfile
, skip
, SEEK_SET
) != 0)
5652 as_bad (_("could not skip to %ld in file `%s'"), skip
, path
);
5656 /* Allocate frag space and store file contents in it. */
5657 binfrag
= frag_more (count
);
5659 bytes
= fread (binfrag
, 1, count
, binfile
);
5661 as_warn (_("truncated file `%s', %ld of %ld bytes read"),
5662 path
, bytes
, count
);
5665 if (binfile
!= NULL
)
5671 /* .include -- include a file at this point. */
5674 s_include (int arg ATTRIBUTE_UNUSED
)
5683 filename
= demand_copy_string (&i
);
5684 if (filename
== NULL
)
5686 /* demand_copy_string has already printed an error and
5687 called ignore_rest_of_line. */
5695 while (!is_end_of_line
[(unsigned char) *input_line_pointer
]
5696 && *input_line_pointer
!= ' '
5697 && *input_line_pointer
!= '\t')
5699 obstack_1grow (¬es
, *input_line_pointer
);
5700 ++input_line_pointer
;
5704 obstack_1grow (¬es
, '\0');
5705 filename
= (char *) obstack_finish (¬es
);
5706 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
5707 ++input_line_pointer
;
5710 demand_empty_rest_of_line ();
5711 path
= (char *) xmalloc ((unsigned long) i
5712 + include_dir_maxlen
+ 5 /* slop */ );
5714 for (i
= 0; i
< include_dir_count
; i
++)
5716 strcpy (path
, include_dirs
[i
]);
5718 strcat (path
, filename
);
5719 if (0 != (try_file
= fopen (path
, FOPEN_RT
)))
5729 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
5730 register_dependency (path
);
5731 input_scrub_insert_file (path
);
5735 add_include_dir (char *path
)
5739 if (include_dir_count
== 0)
5741 include_dirs
= (char **) xmalloc (2 * sizeof (*include_dirs
));
5742 include_dirs
[0] = "."; /* Current dir. */
5743 include_dir_count
= 2;
5747 include_dir_count
++;
5749 (char **) realloc (include_dirs
,
5750 include_dir_count
* sizeof (*include_dirs
));
5753 include_dirs
[include_dir_count
- 1] = path
; /* New one. */
5756 if (i
> include_dir_maxlen
)
5757 include_dir_maxlen
= i
;
5760 /* Output debugging information to denote the source file. */
5763 generate_file_debug (void)
5765 if (debug_type
== DEBUG_STABS
)
5766 stabs_generate_asm_file ();
5769 /* Output line number debugging information for the current source line. */
5772 generate_lineno_debug (void)
5776 case DEBUG_UNSPECIFIED
:
5781 stabs_generate_asm_lineno ();
5784 ecoff_generate_asm_lineno ();
5787 /* ??? We could here indicate to dwarf2dbg.c that something
5788 has changed. However, since there is additional backend
5789 support that is required (calling dwarf2_emit_insn), we
5790 let dwarf2dbg.c call as_where on its own. */
5795 /* Output debugging information to mark a function entry point or end point.
5796 END_P is zero for .func, and non-zero for .endfunc. */
5801 do_s_func (end_p
, NULL
);
5804 /* Subroutine of s_func so targets can choose a different default prefix.
5805 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
5808 do_s_func (int end_p
, const char *default_prefix
)
5810 /* Record the current function so that we can issue an error message for
5811 misplaced .func,.endfunc, and also so that .endfunc needs no
5813 static char *current_name
;
5814 static char *current_label
;
5818 if (current_name
== NULL
)
5820 as_bad (_("missing .func"));
5821 ignore_rest_of_line ();
5825 if (debug_type
== DEBUG_STABS
)
5826 stabs_generate_asm_endfunc (current_name
, current_label
);
5828 current_name
= current_label
= NULL
;
5833 char delim1
, delim2
;
5835 if (current_name
!= NULL
)
5837 as_bad (_(".endfunc missing for previous .func"));
5838 ignore_rest_of_line ();
5842 name
= input_line_pointer
;
5843 delim1
= get_symbol_end ();
5844 name
= xstrdup (name
);
5845 *input_line_pointer
= delim1
;
5847 if (*input_line_pointer
!= ',')
5851 if (asprintf (&label
, "%s%s", default_prefix
, name
) == -1)
5852 as_fatal ("%s", xstrerror (errno
));
5856 char leading_char
= bfd_get_symbol_leading_char (stdoutput
);
5857 /* Missing entry point, use function's name with the leading
5861 if (asprintf (&label
, "%c%s", leading_char
, name
) == -1)
5862 as_fatal ("%s", xstrerror (errno
));
5870 ++input_line_pointer
;
5872 label
= input_line_pointer
;
5873 delim2
= get_symbol_end ();
5874 label
= xstrdup (label
);
5875 *input_line_pointer
= delim2
;
5878 if (debug_type
== DEBUG_STABS
)
5879 stabs_generate_asm_func (name
, label
);
5881 current_name
= name
;
5882 current_label
= label
;
5885 demand_empty_rest_of_line ();
5889 s_ignore (int arg ATTRIBUTE_UNUSED
)
5891 ignore_rest_of_line ();
5895 read_print_statistics (FILE *file
)
5897 hash_print_statistics (file
, "pseudo-op table", po_hash
);
5900 /* Inserts the given line into the input stream.
5902 This call avoids macro/conditionals nesting checking, since the contents of
5903 the line are assumed to replace the contents of a line already scanned.
5905 An appropriate use of this function would be substitution of input lines when
5906 called by md_start_line_hook(). The given line is assumed to already be
5907 properly scrubbed. */
5910 input_scrub_insert_line (const char *line
)
5914 sb_add_string (&newline
, line
);
5915 input_scrub_include_sb (&newline
, input_line_pointer
, 0);
5917 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5920 /* Insert a file into the input stream; the path must resolve to an actual
5921 file; no include path searching or dependency registering is performed. */
5924 input_scrub_insert_file (char *path
)
5926 input_scrub_include_file (path
, input_line_pointer
);
5927 buffer_limit
= input_scrub_next_buffer (&input_line_pointer
);
5930 /* Find the end of a line, considering quotation and escaping of quotes. */
5932 #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
5933 # define TC_SINGLE_QUOTE_STRINGS 1
5937 _find_end_of_line (char *s
, int mri_string
, int insn ATTRIBUTE_UNUSED
,
5940 char inquote
= '\0';
5943 while (!is_end_of_line
[(unsigned char) *s
]
5944 || (inquote
&& !ISCNTRL (*s
))
5945 || (inquote
== '\'' && flag_mri
)
5946 #ifdef TC_EOL_IN_INSN
5947 || (insn
&& TC_EOL_IN_INSN (s
))
5949 /* PR 6926: When we are parsing the body of a macro the sequence
5950 \@ is special - it refers to the invocation count. If the @
5951 character happens to be registered as a line-separator character
5952 by the target, then the is_end_of_line[] test above will have
5953 returned true, but we need to ignore the line separating
5954 semantics in this particular case. */
5955 || (in_macro
&& inescape
&& *s
== '@')
5958 if (mri_string
&& *s
== '\'')
5962 else if (*s
== '\\')
5966 #ifdef TC_SINGLE_QUOTE_STRINGS
5967 || (TC_SINGLE_QUOTE_STRINGS
&& *s
== '\'')
5974 as_warn (_("missing closing `%c'"), inquote
);
5976 as_warn (_("stray `\\'"));
5981 find_end_of_line (char *s
, int mri_string
)
5983 return _find_end_of_line (s
, mri_string
, 0, 0);