1 /* read.c - read a source file -
2 Copyright (C) 1986, 87, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99,
3 2000 Free Software Foundation, Inc.
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
23 #define MASK_CHAR (0xFF) /* If your chars aren't 8 bits, you will
24 change this a bit. But then, GNU isn't
25 spozed to run on your machine anyway.
26 (RMS is so shortsighted sometimes.)
29 #define MASK_CHAR ((int)(unsigned char)-1)
33 /* This is the largest known floating point format (for now). It will
34 grow when we do 4361 style flonums. */
36 #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
38 /* Routines that read assembler source text to build spagetti in memory.
39 Another group of these functions is in the expr.c module. */
52 #ifndef TC_START_LABEL
53 #define TC_START_LABEL(x,y) (x==':')
56 /* The NOP_OPCODE is for the alignment fill value.
57 * fill it a nop instruction so that the disassembler does not choke
61 #define NOP_OPCODE 0x00
64 char *input_line_pointer; /*->next char of source file to parse. */
66 #if BITS_PER_CHAR != 8
67 /* The following table is indexed by[(char)] and will break if
68 a char does not have exactly 256 states (hopefully 0:255!)! */
73 /* The m88k unfortunately uses @ as a label beginner. */
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. */
97 /* The a29k assembler does not permits labels to start with $. */
102 /* The Delta 68k assembler permits ~ at start of label names. */
106 /* used by is_... macros. our ctype[] */
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
130 * Out: 1 if this character ends a line.
133 char is_end_of_line[256] =
136 99, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, 99, Z_, Z_, 99, Z_, Z_, /* @abcdefghijklmno */
138 99, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, 99, Z_, Z_, Z_, Z_, Z_, /* @abcdefghijklmno */
140 Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */
142 Z_,99, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* _!"#$%&'()*+,-./ */
143 Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* 0123456789:;<=>? */
145 Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */
146 Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, 99, Z_, Z_, Z_, Z_, /* 0123456789:;<=>? */
148 Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */
149 Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */
150 Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */
151 Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */
152 Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */
153 Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */
154 Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */
155 Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */
156 Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */
160 /* Functions private to this file. */
162 static char *buffer; /* 1st char of each buffer of lines is here. */
163 static char *buffer_limit; /*->1 + last char in buffer. */
165 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1 in the
166 tc-<CPU>.h file. See the "Porting GAS" section of the internals manual. */
167 int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
169 static char *old_buffer; /* JF a hack */
170 static char *old_input;
171 static char *old_limit;
173 /* Variables for handling include file directory table. */
175 char **include_dirs; /* Table of pointers to directories to
176 search for .include's */
177 int include_dir_count; /* How many are in the table */
178 int include_dir_maxlen = 1;/* Length of longest in table */
180 #ifndef WORKING_DOT_WORD
181 struct broken_word *broken_words;
182 int new_broken_words;
185 /* The current offset into the absolute section. We don't try to
186 build frags in the absolute section, since no data can be stored
187 there. We just keep track of the current offset. */
188 addressT abs_section_offset;
190 /* If this line had an MRI style label, it is stored in this variable.
191 This is used by some of the MRI pseudo-ops. */
194 /* This global variable is used to support MRI common sections. We
195 translate such sections into a common symbol. This variable is
196 non-NULL when we are in an MRI common section. */
197 symbolS *mri_common_symbol;
199 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
200 need to align to an even byte boundary unless the next pseudo-op is
201 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
203 static int mri_pending_align;
207 /* This variable is set to be non-zero if the next string we see might
208 be the name of the source file in DWARF debugging information. See
209 the comment in emit_expr for the format we look for. */
210 static int dwarf_file_string;
214 static void cons_worker PARAMS ((int, int));
215 static int scrub_from_string PARAMS ((char *, int));
216 static void do_align PARAMS ((int, char *, int, int));
217 static void s_align PARAMS ((int, int));
218 static void s_lcomm_internal PARAMS ((int, int));
219 static int hex_float PARAMS ((int, char *));
220 static inline int sizeof_sleb128 PARAMS ((offsetT));
221 static inline int sizeof_uleb128 PARAMS ((valueT));
222 static inline int output_sleb128 PARAMS ((char *, offsetT));
223 static inline int output_uleb128 PARAMS ((char *, valueT));
224 static inline int output_big_sleb128 PARAMS ((char *, LITTLENUM_TYPE *, int));
225 static inline int output_big_uleb128 PARAMS ((char *, LITTLENUM_TYPE *, int));
226 static int output_big_leb128 PARAMS ((char *, LITTLENUM_TYPE *, int, int));
227 static void do_org PARAMS ((segT, expressionS *, int));
228 char *demand_copy_string PARAMS ((int *lenP));
229 static segT get_segmented_expression PARAMS ((expressionS *expP));
230 static segT get_known_segmented_expression PARAMS ((expressionS * expP));
231 static void pobegin PARAMS ((void));
232 static int get_line_sb PARAMS ((sb *));
233 static void generate_file_debug PARAMS ((void));
242 obj_read_begin_hook ();
244 /* Something close -- but not too close -- to a multiple of 1024.
245 The debugging malloc I'm using has 24 bytes of overhead. */
246 obstack_begin (¬es, chunksize);
247 obstack_begin (&cond_obstack, chunksize);
249 /* Use machine dependent syntax */
250 for (p = line_separator_chars; *p; p++)
251 is_end_of_line[(unsigned char) *p] = 1;
252 /* Use more. FIXME-SOMEDAY. */
258 /* set up pseudo-op tables */
260 static struct hash_control *po_hash;
262 static const pseudo_typeS potable[] =
264 {"abort", s_abort, 0},
265 {"align", s_align_ptwo, 0},
266 {"ascii", stringer, 0},
267 {"asciz", stringer, 1},
268 {"balign", s_align_bytes, 0},
269 {"balignw", s_align_bytes, -2},
270 {"balignl", s_align_bytes, -4},
274 {"common", s_mri_common, 0},
275 {"common.s", s_mri_common, 1},
279 {"dc.d", float_cons, 'd'},
281 {"dc.s", float_cons, 'f'},
283 {"dc.x", float_cons, 'x'},
285 {"dcb.b", s_space, 1},
286 {"dcb.d", s_float_space, 'd'},
287 {"dcb.l", s_space, 4},
288 {"dcb.s", s_float_space, 'f'},
289 {"dcb.w", s_space, 2},
290 {"dcb.x", s_float_space, 'x'},
292 {"ds.b", s_space, 1},
293 {"ds.d", s_space, 8},
294 {"ds.l", s_space, 4},
295 {"ds.p", s_space, 12},
296 {"ds.s", s_space, 4},
297 {"ds.w", s_space, 2},
298 {"ds.x", s_space, 12},
299 {"debug", s_ignore, 0},
304 {"double", float_cons, 'd'},
306 {"eject", listing_eject, 0}, /* Formfeed listing */
308 {"elsec", s_else, 0},
310 {"endc", s_endif, 0},
311 {"endfunc", s_func, 1},
312 {"endif", s_endif, 0},
317 {"exitm", s_mexit, 0},
319 {"extern", s_ignore, 0}, /* We treat all undef as ext */
320 {"appfile", s_app_file, 1},
321 {"appline", s_app_line, 0},
323 {"file", s_app_file, 0},
325 {"float", float_cons, 'f'},
326 {"format", s_ignore, 0},
328 {"global", s_globl, 0},
329 {"globl", s_globl, 0},
331 {"if", s_if, (int) O_ne},
333 {"ifdef", s_ifdef, 0},
334 {"ifeq", s_if, (int) O_eq},
335 {"ifeqs", s_ifeqs, 0},
336 {"ifge", s_if, (int) O_ge},
337 {"ifgt", s_if, (int) O_gt},
338 {"ifle", s_if, (int) O_le},
339 {"iflt", s_if, (int) O_lt},
341 {"ifndef", s_ifdef, 1},
342 {"ifne", s_if, (int) O_ne},
343 {"ifnes", s_ifeqs, 1},
344 {"ifnotdef", s_ifdef, 1},
345 {"include", s_include, 0},
351 {"lcomm", s_lcomm, 0},
352 {"lflags", listing_flags, 0}, /* Listing flags */
353 {"linkonce", s_linkonce, 0},
354 {"list", listing_list, 1}, /* Turn listing on */
355 {"llen", listing_psize, 1},
358 {"macro", s_macro, 0},
359 {"mexit", s_mexit, 0},
361 {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
362 {"name", s_ignore, 0},
363 {"noformat", s_ignore, 0},
364 {"nolist", listing_list, 0}, /* Turn listing off */
365 {"nopage", listing_nopage, 0},
367 {"offset", s_struct, 0},
369 {"p2align", s_align_ptwo, 0},
370 {"p2alignw", s_align_ptwo, -2},
371 {"p2alignl", s_align_ptwo, -4},
372 {"page", listing_eject, 0},
373 {"plen", listing_psize, 0},
374 {"print", s_print, 0},
375 {"psize", listing_psize, 0}, /* set paper size */
376 {"purgem", s_purgem, 0},
381 {"sbttl", listing_title, 1}, /* Subtitle of listing */
386 {"single", float_cons, 'f'},
388 {"space", s_space, 0},
389 {"skip", s_space, 0},
390 {"sleb128", s_leb128, 1},
391 {"spc", s_ignore, 0},
392 {"stabd", s_stab, 'd'},
393 {"stabn", s_stab, 'n'},
394 {"stabs", s_stab, 's'},
395 {"string", stringer, 1},
396 {"struct", s_struct, 0},
400 /* This is for gcc to use. It's only just been added (2/94), so gcc
401 won't be able to use it for a while -- probably a year or more.
402 But once this has been released, check with gcc maintainers
403 before deleting it or even changing the spelling. */
404 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
405 /* If we're folding case -- done for some targets, not necessarily
406 all -- the above string in an input file will be converted to
407 this one. Match it either way... */
408 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
410 {"title", listing_title, 0}, /* Listing title */
411 {"ttl", listing_title, 0},
413 {"uleb128", s_leb128, 0},
417 {"xdef", s_globl, 0},
418 {"xref", s_ignore, 0},
419 {"xstabs", s_xstab, 's'},
421 {"zero", s_space, 0},
422 {NULL, NULL, 0} /* end sentinel */
425 static int pop_override_ok = 0;
426 static const char *pop_table_name;
430 const pseudo_typeS *table;
433 const pseudo_typeS *pop;
434 for (pop = table; pop->poc_name; pop++)
436 errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
437 if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
438 as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name,
443 #ifndef md_pop_insert
444 #define md_pop_insert() pop_insert(md_pseudo_table)
447 #ifndef obj_pop_insert
448 #define obj_pop_insert() pop_insert(obj_pseudo_table)
454 po_hash = hash_new ();
456 /* Do the target-specific pseudo ops. */
457 pop_table_name = "md";
460 /* Now object specific. Skip any that were in the target table. */
461 pop_table_name = "obj";
465 /* Now portable ones. Skip any that we've seen already. */
466 pop_table_name = "standard";
467 pop_insert (potable);
470 #define HANDLE_CONDITIONAL_ASSEMBLY() \
471 if (ignore_input ()) \
473 while (! is_end_of_line[(unsigned char) *input_line_pointer++]) \
474 if (input_line_pointer == buffer_limit) \
480 /* This function is used when scrubbing the characters between #APP
483 static char *scrub_string;
484 static char *scrub_string_end;
487 scrub_from_string (buf, buflen)
493 copy = scrub_string_end - scrub_string;
496 memcpy (buf, scrub_string, copy);
497 scrub_string += copy;
501 /* read_a_source_file()
503 * We read the file, putting things into a web that
504 * represents what we have been reading.
507 read_a_source_file (name)
511 register char *s; /* string of symbol, '\0' appended */
515 buffer = input_scrub_new_file (name);
518 listing_newline (NULL);
519 register_dependency (name);
521 /* Generate debugging information before we've read anything in to denote
522 this file as the "main" source file and not a subordinate one
523 (e.g. N_SO vs N_SOL in stabs). */
524 generate_file_debug ();
526 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
527 { /* We have another line to parse. */
528 know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */
529 contin: /* JF this goto is my fault I admit it.
530 Someone brave please re-write the whole
531 input section here? Pleeze??? */
532 while (input_line_pointer < buffer_limit)
534 /* We have more of this buffer to parse. */
537 * We now have input_line_pointer->1st char of next line.
538 * If input_line_pointer [-1] == '\n' then we just
539 * scanned another line: so bump line counters.
541 if (is_end_of_line[(unsigned char) input_line_pointer[-1]])
543 #ifdef md_start_line_hook
544 md_start_line_hook ();
547 if (input_line_pointer[-1] == '\n')
548 bump_line_counters ();
553 #ifdef LABELS_WITHOUT_COLONS
558 /* Text at the start of a line must be a label, we
559 run down and stick a colon in. */
560 if (is_name_beginner (*input_line_pointer))
562 char *line_start = input_line_pointer;
567 HANDLE_CONDITIONAL_ASSEMBLY ();
569 c = get_symbol_end ();
571 /* In MRI mode, the EQU and MACRO pseudoops must
572 be handled specially. */
576 char *rest = input_line_pointer + 1;
580 if (*rest == ' ' || *rest == '\t')
582 if ((strncasecmp (rest, "EQU", 3) == 0
583 || strncasecmp (rest, "SET", 3) == 0)
584 && (rest[3] == ' ' || rest[3] == '\t'))
586 input_line_pointer = rest + 3;
588 strncasecmp (rest, "SET", 3) == 0);
591 if (strncasecmp (rest, "MACRO", 5) == 0
594 || is_end_of_line[(unsigned char) rest[5]]))
598 /* In MRI mode, we need to handle the MACRO
599 pseudo-op specially: we don't want to put the
600 symbol in the symbol table. */
601 if (! mri_line_macro)
602 line_label = colon (line_start);
604 line_label = symbol_create (line_start,
609 *input_line_pointer = c;
611 input_line_pointer++;
617 * We are at the begining of a line, or similar place.
618 * We expect a well-formed assembler statement.
619 * A "symbol-name:" is a statement.
621 * Depending on what compiler is used, the order of these tests
622 * may vary to catch most common case 1st.
623 * Each test is independent of all other tests at the (top) level.
624 * PLEASE make a compiler that doesn't use this assembler.
625 * It is crufty to waste a compiler's time encoding things for this
626 * assembler, which then wastes more time decoding it.
627 * (And communicating via (linear) files is silly!
628 * If you must pass stuff, please pass a tree!)
630 if ((c = *input_line_pointer++) == '\t'
635 c = *input_line_pointer++;
637 know (c != ' '); /* No further leading whitespace. */
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)
649 /* Find the end of the current expanded macro line. */
650 for (s = input_line_pointer-1; *s ; ++s)
651 if (is_end_of_line[(unsigned char) *s])
654 /* Copy it for safe keeping. Also give an indication of
655 how much macro nesting is involved at this point. */
656 len = s - (input_line_pointer-1);
657 copy = (char *) xmalloc (len + macro_nest + 2);
658 memset (copy, '>', macro_nest);
659 copy[macro_nest] = ' ';
660 memcpy (copy + macro_nest + 1, input_line_pointer-1, len);
661 copy[macro_nest+1+len] = '\0';
663 /* Install the line with the listing facility. */
664 listing_newline (copy);
667 listing_newline (NULL);
672 * C is the 1st significant character.
673 * Input_line_pointer points after that character.
675 if (is_name_beginner (c))
677 /* want user-defined label or pseudo/opcode */
678 HANDLE_CONDITIONAL_ASSEMBLY ();
680 s = --input_line_pointer;
681 c = get_symbol_end (); /* name's delimiter */
683 * C is character after symbol.
684 * That character's place in the input line is now '\0'.
685 * S points to the beginning of the symbol.
686 * [In case of pseudo-op, s->'.'.]
687 * Input_line_pointer->'\0' where c was.
689 if (TC_START_LABEL(c, input_line_pointer))
693 char *rest = input_line_pointer + 1;
695 /* In MRI mode, \tsym: set 0 is permitted. */
699 if (*rest == ' ' || *rest == '\t')
701 if ((strncasecmp (rest, "EQU", 3) == 0
702 || strncasecmp (rest, "SET", 3) == 0)
703 && (rest[3] == ' ' || rest[3] == '\t'))
705 input_line_pointer = rest + 3;
711 line_label = colon (s); /* user-defined label */
712 *input_line_pointer++ = ':'; /* Put ':' back for error messages' sake. */
713 /* Input_line_pointer->after ':'. */
719 || ((c == ' ' || c == '\t')
720 && input_line_pointer[1] == '='
721 #ifdef TC_EQUAL_IN_INSN
722 && ! TC_EQUAL_IN_INSN (c, input_line_pointer)
727 demand_empty_rest_of_line ();
730 { /* expect pseudo-op or machine instruction */
733 #define IGNORE_OPCODE_CASE
734 #ifdef IGNORE_OPCODE_CASE
739 if (isupper ((unsigned char) *s2))
752 /* The MRI assembler and the m88k use pseudo-ops
754 pop = (pseudo_typeS *) hash_find (po_hash, s);
755 if (pop != NULL && pop->poc_handler == NULL)
760 || (! flag_m68k_mri && *s == '.'))
765 * WARNING: c has next char, which may be end-of-line.
766 * We lookup the pseudo-op table with s+1 because we
767 * already know that the pseudo-op begins with a '.'.
771 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
773 /* In MRI mode, we may need to insert an
774 automatic alignment directive. What a hack
776 if (mri_pending_align
778 || ! ((pop->poc_handler == cons
779 && pop->poc_val == 1)
780 || (pop->poc_handler == s_space
781 && pop->poc_val == 1)
782 #ifdef tc_conditional_pseudoop
783 || tc_conditional_pseudoop (pop)
785 || pop->poc_handler == s_if
786 || pop->poc_handler == s_ifdef
787 || pop->poc_handler == s_ifc
788 || pop->poc_handler == s_ifeqs
789 || pop->poc_handler == s_else
790 || pop->poc_handler == s_endif
791 || pop->poc_handler == s_globl
792 || pop->poc_handler == s_ignore)))
794 do_align (1, (char *) NULL, 0, 0);
795 mri_pending_align = 0;
796 if (line_label != NULL)
798 symbol_set_frag (line_label, frag_now);
799 S_SET_VALUE (line_label, frag_now_fix ());
803 /* Print the error msg now, while we still can */
806 as_bad (_("Unknown pseudo-op: `%s'"), s);
807 *input_line_pointer = c;
812 /* Put it back for error messages etc. */
813 *input_line_pointer = c;
814 /* The following skip of whitespace is compulsory.
815 A well shaped space is sometimes all that separates
816 keyword from operands. */
817 if (c == ' ' || c == '\t')
818 input_line_pointer++;
820 * Input_line is restored.
821 * Input_line_pointer->1st non-blank char
822 * after pseudo-operation.
824 (*pop->poc_handler) (pop->poc_val);
826 /* If that was .end, just get out now. */
827 if (pop->poc_handler == s_end)
833 #ifdef QUOTES_IN_INSN
837 /* WARNING: c has char, which may be end-of-line. */
838 /* Also: input_line_pointer->`\0` where c was. */
839 *input_line_pointer = c;
840 while (!is_end_of_line[(unsigned char) *input_line_pointer]
842 #ifdef TC_EOL_IN_INSN
843 || TC_EOL_IN_INSN (input_line_pointer)
847 if (flag_m68k_mri && *input_line_pointer == '\'')
849 #ifdef QUOTES_IN_INSN
852 else if (*input_line_pointer == '"')
854 else if (*input_line_pointer == '\\')
857 input_line_pointer++;
860 c = *input_line_pointer;
861 *input_line_pointer = '\0';
863 generate_lineno_debug ();
870 if (check_macro (s, &out, '\0', &err))
874 *input_line_pointer++ = c;
875 input_scrub_include_sb (&out,
879 input_scrub_next_buffer (&input_line_pointer);
884 if (mri_pending_align)
886 do_align (1, (char *) NULL, 0, 0);
887 mri_pending_align = 0;
888 if (line_label != NULL)
890 symbol_set_frag (line_label, frag_now);
891 S_SET_VALUE (line_label, frag_now_fix ());
895 md_assemble (s); /* Assemble 1 instruction. */
897 *input_line_pointer++ = c;
899 /* We resume loop AFTER the end-of-line from
904 } /* if (is_name_beginner(c) */
907 /* Empty statement? */
908 if (is_end_of_line[(unsigned char) c])
911 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB)
912 && isdigit ((unsigned char) c))
914 /* local label ("4:") */
915 char *backup = input_line_pointer;
917 HANDLE_CONDITIONAL_ASSEMBLY ();
921 while (isdigit ((unsigned char) *input_line_pointer))
923 temp = (temp * 10) + *input_line_pointer - '0';
924 ++input_line_pointer;
925 } /* read the whole number */
927 if (LOCAL_LABELS_DOLLAR
928 && *input_line_pointer == '$'
929 && *(input_line_pointer + 1) == ':')
931 input_line_pointer += 2;
933 if (dollar_label_defined (temp))
935 as_fatal (_("label \"%d$\" redefined"), temp);
938 define_dollar_label (temp);
939 colon (dollar_label_name (temp, 0));
944 && *input_line_pointer++ == ':')
946 fb_label_instance_inc (temp);
947 colon (fb_label_name (temp, 0));
951 input_line_pointer = backup;
952 } /* local label ("4:") */
954 if (c && strchr (line_comment_chars, c))
955 { /* Its a comment. Better say APP or NO_APP */
959 unsigned int new_length;
962 bump_line_counters ();
963 s = input_line_pointer;
964 if (strncmp (s, "APP\n", 4))
965 continue; /* We ignore it */
968 ends = strstr (s, "#NO_APP\n");
972 unsigned int tmp_len;
975 /* The end of the #APP wasn't in this buffer. We
976 keep reading in buffers until we find the #NO_APP
977 that goes with this #APP There is one. The specs
979 tmp_len = buffer_limit - s;
980 tmp_buf = xmalloc (tmp_len + 1);
981 memcpy (tmp_buf, s, tmp_len);
984 new_tmp = input_scrub_next_buffer (&buffer);
988 buffer_limit = new_tmp;
989 input_line_pointer = buffer;
990 ends = strstr (buffer, "#NO_APP\n");
994 num = buffer_limit - buffer;
996 tmp_buf = xrealloc (tmp_buf, tmp_len + num);
997 memcpy (tmp_buf + tmp_len, buffer, num);
1002 input_line_pointer = ends ? ends + 8 : NULL;
1010 input_line_pointer = ends + 8;
1014 scrub_string_end = ends;
1016 new_length = ends - s;
1017 new_buf = (char *) xmalloc (new_length);
1024 space = (new_buf + new_length) - new_tmp;
1025 size = do_scrub_chars (scrub_from_string, new_tmp, space);
1033 new_buf = xrealloc (new_buf, new_length + 100);
1034 new_tmp = new_buf + new_length;
1040 old_buffer = buffer;
1041 old_input = input_line_pointer;
1042 old_limit = buffer_limit;
1044 input_line_pointer = new_buf;
1045 buffer_limit = new_tmp;
1049 HANDLE_CONDITIONAL_ASSEMBLY ();
1051 #ifdef tc_unrecognized_line
1052 if (tc_unrecognized_line (c))
1056 /* as_warn("Junk character %d.",c); Now done by ignore_rest */
1057 input_line_pointer--; /* Report unknown char as ignored. */
1058 ignore_rest_of_line ();
1059 } /* while (input_line_pointer<buffer_limit) */
1061 #ifdef md_after_pass_hook
1062 md_after_pass_hook ();
1068 bump_line_counters ();
1071 buffer = old_buffer;
1072 input_line_pointer = old_input;
1073 buffer_limit = old_limit;
1078 } /* while (more buffers to scan) */
1085 input_scrub_close (); /* Close the input file */
1088 /* For most MRI pseudo-ops, the line actually ends at the first
1089 nonquoted space. This function looks for that point, stuffs a null
1090 in, and sets *STOPCP to the character that used to be there, and
1091 returns the location.
1093 Until I hear otherwise, I am going to assume that this is only true
1094 for the m68k MRI assembler. */
1097 mri_comment_field (stopcp)
1105 know (flag_m68k_mri);
1107 for (s = input_line_pointer;
1108 ((! is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
1113 inquote = ! inquote;
1123 for (s = input_line_pointer; ! is_end_of_line[(unsigned char) *s]; s++)
1133 /* Skip to the end of an MRI comment field. */
1136 mri_comment_end (stop, stopc)
1142 input_line_pointer = stop;
1144 while (! is_end_of_line[(unsigned char) *input_line_pointer])
1145 ++input_line_pointer;
1150 int ignore ATTRIBUTE_UNUSED;
1152 as_fatal (_(".abort detected. Abandoning ship."));
1155 /* Guts of .align directive. N is the power of two to which to align.
1156 FILL may be NULL, or it may point to the bytes of the fill pattern.
1157 LEN is the length of whatever FILL points to, if anything. MAX is
1158 the maximum number of characters to skip when doing the alignment,
1159 or 0 if there is no maximum. */
1162 do_align (n, fill, len, max)
1171 md_do_align (n, fill, len, max, just_record_alignment);
1176 if (subseg_text_p (now_seg))
1177 default_fill = NOP_OPCODE;
1180 fill = &default_fill;
1184 /* Only make a frag if we HAVE to. . . */
1185 if (n != 0 && !need_pass_2)
1188 frag_align (n, *fill, max);
1190 frag_align_pattern (n, fill, len, max);
1194 just_record_alignment:
1197 record_alignment (now_seg, n);
1200 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1201 (in bytes). A negative ARG is the negative of the length of the
1202 fill pattern. BYTES_P is non-zero if the alignment value should be
1203 interpreted as the byte boundary, rather than the power of 2. */
1206 s_align (arg, bytes_p)
1210 register unsigned int align;
1218 stop = mri_comment_field (&stopc);
1220 if (is_end_of_line[(unsigned char) *input_line_pointer])
1225 align = arg; /* Default value from pseudo-op table */
1229 align = get_absolute_expression ();
1235 /* Convert to a power of 2. */
1240 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1243 as_bad (_("Alignment not a power of 2"));
1251 as_bad (_("Alignment too large: %u assumed"), align);
1254 if (*input_line_pointer != ',')
1261 ++input_line_pointer;
1262 if (*input_line_pointer == ',')
1266 fill = get_absolute_expression ();
1271 if (*input_line_pointer != ',')
1275 ++input_line_pointer;
1276 max = get_absolute_expression ();
1283 as_warn (_("expected fill pattern missing"));
1284 do_align (align, (char *) NULL, 0, max);
1299 do_align (align, &fill_char, fill_len, max);
1305 if ((size_t) fill_len > sizeof ab)
1307 md_number_to_chars (ab, fill, fill_len);
1308 do_align (align, ab, fill_len, max);
1312 demand_empty_rest_of_line ();
1315 mri_comment_end (stop, stopc);
1318 /* Handle the .align pseudo-op on machines where ".align 4" means
1319 align to a 4 byte boundary. */
1328 /* Handle the .align pseudo-op on machines where ".align 4" means align
1329 to a 2**4 boundary. */
1340 int ignore ATTRIBUTE_UNUSED;
1342 register char *name;
1346 register symbolS *symbolP;
1351 stop = mri_comment_field (&stopc);
1353 name = input_line_pointer;
1354 c = get_symbol_end ();
1355 /* just after name is now '\0' */
1356 p = input_line_pointer;
1359 if (*input_line_pointer != ',')
1361 as_bad (_("Expected comma after symbol-name: rest of line ignored."));
1362 ignore_rest_of_line ();
1364 mri_comment_end (stop, stopc);
1367 input_line_pointer++; /* skip ',' */
1368 if ((temp = get_absolute_expression ()) < 0)
1370 as_warn (_(".COMMon length (%ld.) <0! Ignored."), (long) temp);
1371 ignore_rest_of_line ();
1373 mri_comment_end (stop, stopc);
1377 symbolP = symbol_find_or_make (name);
1379 if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP))
1381 as_bad (_("Ignoring attempt to re-define symbol `%s'."),
1382 S_GET_NAME (symbolP));
1383 ignore_rest_of_line ();
1385 mri_comment_end (stop, stopc);
1388 if (S_GET_VALUE (symbolP))
1390 if (S_GET_VALUE (symbolP) != (valueT) temp)
1391 as_bad (_("Length of .comm \"%s\" is already %ld. Not changed to %ld."),
1392 S_GET_NAME (symbolP),
1393 (long) S_GET_VALUE (symbolP),
1398 S_SET_VALUE (symbolP, (valueT) temp);
1399 S_SET_EXTERNAL (symbolP);
1403 extern int flag_one;
1404 if ( (!temp) || !flag_one)
1405 S_GET_OTHER(symbolP) = const_flag;
1407 #endif /* not OBJ_VMS */
1408 know (symbolP->sy_frag == &zero_address_frag);
1410 demand_empty_rest_of_line ();
1413 mri_comment_end (stop, stopc);
1416 /* The MRI COMMON pseudo-op. We handle this by creating a common
1417 symbol with the appropriate name. We make s_space do the right
1418 thing by increasing the size. */
1421 s_mri_common (small)
1422 int small ATTRIBUTE_UNUSED;
1438 stop = mri_comment_field (&stopc);
1442 name = input_line_pointer;
1443 if (! isdigit ((unsigned char) *name))
1444 c = get_symbol_end ();
1449 ++input_line_pointer;
1451 while (isdigit ((unsigned char) *input_line_pointer));
1452 c = *input_line_pointer;
1453 *input_line_pointer = '\0';
1455 if (line_label != NULL)
1457 alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
1458 + (input_line_pointer - name)
1460 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1465 sym = symbol_find_or_make (name);
1466 *input_line_pointer = c;
1470 if (*input_line_pointer != ',')
1474 ++input_line_pointer;
1475 align = get_absolute_expression ();
1478 if (S_IS_DEFINED (sym) && ! S_IS_COMMON (sym))
1480 as_bad (_("attempt to re-define symbol `%s'"), S_GET_NAME (sym));
1481 ignore_rest_of_line ();
1482 mri_comment_end (stop, stopc);
1486 S_SET_EXTERNAL (sym);
1487 mri_common_symbol = sym;
1491 S_SET_ALIGN (sym, align);
1494 if (line_label != NULL)
1497 exp.X_op = O_symbol;
1498 exp.X_add_symbol = sym;
1499 exp.X_add_number = 0;
1500 symbol_set_value_expression (line_label, &exp);
1501 symbol_set_frag (line_label, &zero_address_frag);
1502 S_SET_SEGMENT (line_label, expr_section);
1505 /* FIXME: We just ignore the small argument, which distinguishes
1506 COMMON and COMMON.S. I don't know what we can do about it. */
1508 /* Ignore the type and hptype. */
1509 if (*input_line_pointer == ',')
1510 input_line_pointer += 2;
1511 if (*input_line_pointer == ',')
1512 input_line_pointer += 2;
1514 demand_empty_rest_of_line ();
1516 mri_comment_end (stop, stopc);
1521 int ignore ATTRIBUTE_UNUSED;
1526 temp = get_absolute_expression ();
1527 if (flag_readonly_data_in_text)
1529 section = text_section;
1533 section = data_section;
1535 subseg_set (section, (subsegT) temp);
1540 demand_empty_rest_of_line ();
1543 /* Handle the .appfile pseudo-op. This is automatically generated by
1544 do_scrub_chars when a preprocessor # line comment is seen with a
1545 file name. This default definition may be overridden by the object
1546 or CPU specific pseudo-ops. This function is also the default
1547 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1551 s_app_file (appfile)
1557 /* Some assemblers tolerate immediately following '"' */
1558 if ((s = demand_copy_string (&length)) != 0)
1560 /* If this is a fake .appfile, a fake newline was inserted into
1561 the buffer. Passing -2 to new_logical_line tells it to
1564 = (! new_logical_line (s, appfile ? -2 : -1) && appfile);
1566 /* In MRI mode, the preprocessor may have inserted an extraneous
1569 && *input_line_pointer == '\''
1570 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1571 ++input_line_pointer;
1573 demand_empty_rest_of_line ();
1578 listing_source_file (s);
1580 register_dependency (s);
1588 /* Handle the .appline pseudo-op. This is automatically generated by
1589 do_scrub_chars when a preprocessor # line comment is seen. This
1590 default definition may be overridden by the object or CPU specific
1595 int ignore ATTRIBUTE_UNUSED;
1599 /* The given number is that of the next line. */
1600 l = get_absolute_expression () - 1;
1602 /* Some of the back ends can't deal with non-positive line numbers.
1603 Besides, it's silly. */
1604 as_warn (_("Line numbers must be positive; line number %d rejected."), l+1);
1607 new_logical_line ((char *) NULL, l);
1610 listing_source_line (l);
1613 demand_empty_rest_of_line ();
1616 /* Handle the .end pseudo-op. Actually, the real work is done in
1617 read_a_source_file. */
1621 int ignore ATTRIBUTE_UNUSED;
1625 /* The MRI assembler permits the start symbol to follow .end,
1626 but we don't support that. */
1628 if (! is_end_of_line[(unsigned char) *input_line_pointer]
1629 && *input_line_pointer != '*'
1630 && *input_line_pointer != '!')
1631 as_warn (_("start address not supported"));
1635 /* Handle the .err pseudo-op. */
1639 int ignore ATTRIBUTE_UNUSED;
1641 as_bad (_(".err encountered"));
1642 demand_empty_rest_of_line ();
1645 /* Handle the MRI fail pseudo-op. */
1649 int ignore ATTRIBUTE_UNUSED;
1656 stop = mri_comment_field (&stopc);
1658 temp = get_absolute_expression ();
1660 as_warn (_(".fail %ld encountered"), (long) temp);
1662 as_bad (_(".fail %ld encountered"), (long) temp);
1664 demand_empty_rest_of_line ();
1667 mri_comment_end (stop, stopc);
1672 int ignore ATTRIBUTE_UNUSED;
1674 expressionS rep_exp;
1676 register long fill = 0;
1679 #ifdef md_flush_pending_output
1680 md_flush_pending_output ();
1683 get_known_segmented_expression (&rep_exp);
1684 if (*input_line_pointer == ',')
1686 input_line_pointer++;
1687 size = get_absolute_expression ();
1688 if (*input_line_pointer == ',')
1690 input_line_pointer++;
1691 fill = get_absolute_expression ();
1695 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1696 #define BSD_FILL_SIZE_CROCK_8 (8)
1697 if (size > BSD_FILL_SIZE_CROCK_8)
1699 as_warn (_(".fill size clamped to %d."), BSD_FILL_SIZE_CROCK_8);
1700 size = BSD_FILL_SIZE_CROCK_8;
1704 as_warn (_("Size negative: .fill ignored."));
1707 else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
1709 if (rep_exp.X_add_number < 0)
1710 as_warn (_("Repeat < 0, .fill ignored"));
1714 if (size && !need_pass_2)
1716 if (rep_exp.X_op == O_constant)
1718 p = frag_var (rs_fill, (int) size, (int) size,
1719 (relax_substateT) 0, (symbolS *) 0,
1720 (offsetT) rep_exp.X_add_number,
1725 /* We don't have a constant repeat count, so we can't use
1726 rs_fill. We can get the same results out of rs_space,
1727 but its argument is in bytes, so we must multiply the
1728 repeat count by size. */
1731 rep_sym = make_expr_symbol (&rep_exp);
1734 expressionS size_exp;
1735 size_exp.X_op = O_constant;
1736 size_exp.X_add_number = size;
1738 rep_exp.X_op = O_multiply;
1739 rep_exp.X_add_symbol = rep_sym;
1740 rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
1741 rep_exp.X_add_number = 0;
1742 rep_sym = make_expr_symbol (&rep_exp);
1745 p = frag_var (rs_space, (int) size, (int) size,
1746 (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
1748 memset (p, 0, (unsigned int) size);
1749 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1750 * flavoured AS. The following bizzare behaviour is to be
1751 * compatible with above. I guess they tried to take up to 8
1752 * bytes from a 4-byte expression and they forgot to sign
1753 * extend. Un*x Sux. */
1754 #define BSD_FILL_SIZE_CROCK_4 (4)
1755 md_number_to_chars (p, (valueT) fill,
1756 (size > BSD_FILL_SIZE_CROCK_4
1757 ? BSD_FILL_SIZE_CROCK_4
1759 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1760 * but emits no error message because it seems a legal thing to do.
1761 * It is a degenerate case of .fill but could be emitted by a compiler.
1764 demand_empty_rest_of_line ();
1769 int ignore ATTRIBUTE_UNUSED;
1778 stop = mri_comment_field (&stopc);
1782 name = input_line_pointer;
1783 c = get_symbol_end ();
1784 symbolP = symbol_find_or_make (name);
1785 S_SET_EXTERNAL (symbolP);
1787 *input_line_pointer = c;
1789 c = *input_line_pointer;
1792 input_line_pointer++;
1794 if (*input_line_pointer == '\n')
1800 demand_empty_rest_of_line ();
1803 mri_comment_end (stop, stopc);
1806 /* Handle the MRI IRP and IRPC pseudo-ops. */
1818 as_where (&file, &line);
1821 while (! is_end_of_line[(unsigned char) *input_line_pointer])
1822 sb_add_char (&s, *input_line_pointer++);
1826 err = expand_irp (irpc, 0, &s, &out, get_line_sb, '\0');
1828 as_bad_where (file, line, "%s", err);
1832 input_scrub_include_sb (&out, input_line_pointer);
1834 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1837 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
1838 the section to only be linked once. However, this is not supported
1839 by most object file formats. This takes an optional argument,
1840 which is what to do about duplicates. */
1844 int ignore ATTRIBUTE_UNUSED;
1846 enum linkonce_type type;
1850 type = LINKONCE_DISCARD;
1852 if (! is_end_of_line[(unsigned char) *input_line_pointer])
1857 s = input_line_pointer;
1858 c = get_symbol_end ();
1859 if (strcasecmp (s, "discard") == 0)
1860 type = LINKONCE_DISCARD;
1861 else if (strcasecmp (s, "one_only") == 0)
1862 type = LINKONCE_ONE_ONLY;
1863 else if (strcasecmp (s, "same_size") == 0)
1864 type = LINKONCE_SAME_SIZE;
1865 else if (strcasecmp (s, "same_contents") == 0)
1866 type = LINKONCE_SAME_CONTENTS;
1868 as_warn (_("unrecognized .linkonce type `%s'"), s);
1870 *input_line_pointer = c;
1873 #ifdef obj_handle_link_once
1874 obj_handle_link_once (type);
1875 #else /* ! defined (obj_handle_link_once) */
1876 #ifdef BFD_ASSEMBLER
1880 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
1881 as_warn (_(".linkonce is not supported for this object file format"));
1883 flags = bfd_get_section_flags (stdoutput, now_seg);
1884 flags |= SEC_LINK_ONCE;
1889 case LINKONCE_DISCARD:
1890 flags |= SEC_LINK_DUPLICATES_DISCARD;
1892 case LINKONCE_ONE_ONLY:
1893 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
1895 case LINKONCE_SAME_SIZE:
1896 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
1898 case LINKONCE_SAME_CONTENTS:
1899 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
1902 if (! bfd_set_section_flags (stdoutput, now_seg, flags))
1903 as_bad (_("bfd_set_section_flags: %s"),
1904 bfd_errmsg (bfd_get_error ()));
1906 #else /* ! defined (BFD_ASSEMBLER) */
1907 as_warn (_(".linkonce is not supported for this object file format"));
1908 #endif /* ! defined (BFD_ASSEMBLER) */
1909 #endif /* ! defined (obj_handle_link_once) */
1911 demand_empty_rest_of_line ();
1915 s_lcomm_internal (needs_align, bytes_p)
1916 /* 1 if this was a ".bss" directive, which may require a 3rd argument
1917 (alignment); 0 if it was an ".lcomm" (2 args only) */
1919 /* 1 if the alignment value should be interpreted as the byte boundary,
1920 rather than the power of 2. */
1923 register char *name;
1927 register symbolS *symbolP;
1928 segT current_seg = now_seg;
1929 subsegT current_subseg = now_subseg;
1930 const int max_alignment = 15;
1932 segT bss_seg = bss_section;
1934 name = input_line_pointer;
1935 c = get_symbol_end ();
1936 p = input_line_pointer;
1940 /* Accept an optional comma after the name. The comma used to be
1941 required, but Irix 5 cc does not generate it. */
1942 if (*input_line_pointer == ',')
1944 ++input_line_pointer;
1948 if (*input_line_pointer == '\n')
1950 as_bad (_("Missing size expression"));
1954 if ((temp = get_absolute_expression ()) < 0)
1956 as_warn (_("BSS length (%d.) <0! Ignored."), temp);
1957 ignore_rest_of_line ();
1961 #if defined (TC_MIPS) || defined (TC_ALPHA)
1962 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
1963 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
1965 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
1966 if (temp <= bfd_get_gp_size (stdoutput))
1968 bss_seg = subseg_new (".sbss", 1);
1969 seg_info (bss_seg)->bss = 1;
1970 #ifdef BFD_ASSEMBLER
1971 if (! bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
1972 as_warn (_("error setting flags for \".sbss\": %s"),
1973 bfd_errmsg (bfd_get_error ()));
1980 /* FIXME. This needs to be machine independent. */
1991 /* FIXME: This needs to be done in a more general fashion. */
1995 record_alignment(bss_seg, align);
2002 if (*input_line_pointer != ',')
2004 as_bad (_("Expected comma after size"));
2005 ignore_rest_of_line ();
2008 input_line_pointer++;
2010 if (*input_line_pointer == '\n')
2012 as_bad (_("Missing alignment"));
2015 align = get_absolute_expression ();
2018 /* Convert to a power of 2. */
2023 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
2026 as_bad (_("Alignment not a power of 2"));
2030 if (align > max_alignment)
2032 align = max_alignment;
2033 as_warn (_("Alignment too large: %d. assumed."), align);
2038 as_warn (_("Alignment negative. 0 assumed."));
2040 record_alignment (bss_seg, align);
2041 } /* if needs align */
2044 /* Assume some objects may require alignment on some systems. */
2045 #if defined (TC_ALPHA) && ! defined (VMS)
2048 align = ffs (temp) - 1;
2049 if (temp % (1 << align))
2056 symbolP = symbol_find_or_make (name);
2060 #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT) \
2061 || defined (OBJ_BOUT) || defined (OBJ_MAYBE_BOUT))
2062 #ifdef BFD_ASSEMBLER
2063 (OUTPUT_FLAVOR != bfd_target_aout_flavour
2064 || (S_GET_OTHER (symbolP) == 0 && S_GET_DESC (symbolP) == 0)) &&
2066 (S_GET_OTHER (symbolP) == 0 && S_GET_DESC (symbolP) == 0) &&
2069 (S_GET_SEGMENT (symbolP) == bss_seg
2070 || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0)))
2074 subseg_set (bss_seg, 1);
2077 frag_align (align, 0, 0);
2078 /* detach from old frag */
2079 if (S_GET_SEGMENT (symbolP) == bss_seg)
2080 symbol_get_frag (symbolP)->fr_symbol = NULL;
2082 symbol_set_frag (symbolP, frag_now);
2083 pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP,
2084 (offsetT) temp, (char *) 0);
2087 S_SET_SEGMENT (symbolP, bss_seg);
2090 /* The symbol may already have been created with a preceding
2091 ".globl" directive -- be careful not to step on storage class
2092 in that case. Otherwise, set it to static. */
2093 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
2095 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2097 #endif /* OBJ_COFF */
2100 S_SET_SIZE (symbolP, temp);
2104 as_bad (_("Ignoring attempt to re-define symbol `%s'."),
2105 S_GET_NAME (symbolP));
2107 subseg_set (current_seg, current_subseg);
2109 demand_empty_rest_of_line ();
2110 } /* s_lcomm_internal() */
2113 s_lcomm (needs_align)
2116 s_lcomm_internal (needs_align, 0);
2119 void s_lcomm_bytes (needs_align)
2122 s_lcomm_internal (needs_align, 1);
2127 int ignore ATTRIBUTE_UNUSED;
2129 register char *name;
2133 register symbolS *symbolP;
2135 /* we permit ANY defined expression: BSD4.2 demands constants */
2136 name = input_line_pointer;
2137 c = get_symbol_end ();
2138 p = input_line_pointer;
2141 if (*input_line_pointer != ',')
2144 as_bad (_("Expected comma after name \"%s\""), name);
2146 ignore_rest_of_line ();
2149 input_line_pointer++;
2151 if (exp.X_op != O_constant
2152 && exp.X_op != O_register)
2154 as_bad (_("bad expression"));
2155 ignore_rest_of_line ();
2159 symbolP = symbol_find_or_make (name);
2161 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
2162 symbolP->sy_desc == 0) out of this test because coff doesn't have
2163 those fields, and I can't see when they'd ever be tripped. I
2164 don't think I understand why they were here so I may have
2165 introduced a bug. As recently as 1.37 didn't have this test
2166 anyway. xoxorich. */
2168 if (S_GET_SEGMENT (symbolP) == undefined_section
2169 && S_GET_VALUE (symbolP) == 0)
2171 /* The name might be an undefined .global symbol; be sure to
2172 keep the "external" bit. */
2173 S_SET_SEGMENT (symbolP,
2174 (exp.X_op == O_constant
2177 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2181 as_bad (_("Symbol %s already defined"), name);
2184 demand_empty_rest_of_line ();
2187 /* Read a line into an sb. */
2193 char quote1, quote2, inquote;
2195 if (input_line_pointer[-1] == '\n')
2196 bump_line_counters ();
2198 if (input_line_pointer >= buffer_limit)
2200 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2201 if (buffer_limit == 0)
2205 /* If app.c sets any other characters to LEX_IS_STRINGQUOTE, this
2206 code needs to be changed. */
2207 if (! flag_m68k_mri)
2215 #ifdef LEX_IS_STRINGQUOTE
2220 while (! is_end_of_line[(unsigned char) *input_line_pointer]
2221 || (inquote != '\0' && *input_line_pointer != '\n'))
2223 if (inquote == *input_line_pointer)
2225 else if (inquote == '\0')
2227 if (*input_line_pointer == quote1)
2229 else if (*input_line_pointer == quote2)
2232 sb_add_char (line, *input_line_pointer++);
2234 while (input_line_pointer < buffer_limit
2235 && is_end_of_line[(unsigned char) *input_line_pointer])
2237 if (input_line_pointer[-1] == '\n')
2238 bump_line_counters ();
2239 ++input_line_pointer;
2244 /* Define a macro. This is an interface to macro.c, which is shared
2245 between gas and gasp. */
2249 int ignore ATTRIBUTE_UNUSED;
2258 as_where (&file, &line);
2261 while (! is_end_of_line[(unsigned char) *input_line_pointer])
2262 sb_add_char (&s, *input_line_pointer++);
2265 if (line_label != NULL)
2266 sb_add_string (&label, S_GET_NAME (line_label));
2268 err = define_macro (0, &s, &label, get_line_sb, &name);
2270 as_bad_where (file, line, "%s", err);
2273 if (line_label != NULL)
2275 S_SET_SEGMENT (line_label, undefined_section);
2276 S_SET_VALUE (line_label, 0);
2277 symbol_set_frag (line_label, &zero_address_frag);
2281 #ifdef NO_PSEUDO_DOT
2285 && hash_find (po_hash, name) != NULL)
2288 && hash_find (po_hash, name + 1) != NULL))
2289 as_warn (_("attempt to redefine pseudo-op `%s' ignored"),
2296 /* Handle the .mexit pseudo-op, which immediately exits a macro
2301 int ignore ATTRIBUTE_UNUSED;
2303 cond_exit_macro (macro_nest);
2304 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2307 /* Switch in and out of MRI mode. */
2311 int ignore ATTRIBUTE_UNUSED;
2315 on = get_absolute_expression ();
2316 old_flag = flag_mri;
2332 /* Operator precedence changes in m68k MRI mode, so we need to
2333 update the operator rankings. */
2334 expr_set_precedence ();
2336 #ifdef MRI_MODE_CHANGE
2338 MRI_MODE_CHANGE (on);
2341 demand_empty_rest_of_line ();
2344 /* Handle changing the location counter. */
2347 do_org (segment, exp, fill)
2352 if (segment != now_seg && segment != absolute_section)
2353 as_bad (_("invalid segment \"%s\"; segment \"%s\" assumed"),
2354 segment_name (segment), segment_name (now_seg));
2356 if (now_seg == absolute_section)
2359 as_warn (_("ignoring fill value in absolute section"));
2360 if (exp->X_op != O_constant)
2362 as_bad (_("only constant offsets supported in absolute section"));
2363 exp->X_add_number = 0;
2365 abs_section_offset = exp->X_add_number;
2371 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp->X_add_symbol,
2372 exp->X_add_number, (char *) NULL);
2379 int ignore ATTRIBUTE_UNUSED;
2381 register segT segment;
2383 register long temp_fill;
2385 #ifdef md_flush_pending_output
2386 md_flush_pending_output ();
2389 /* The m68k MRI assembler has a different meaning for .org. It
2390 means to create an absolute section at a given address. We can't
2391 support that--use a linker script instead. */
2394 as_bad (_("MRI style ORG pseudo-op not supported"));
2395 ignore_rest_of_line ();
2399 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2400 thing as a sub-segment-relative origin. Any absolute origin is
2401 given a warning, then assumed to be segment-relative. Any
2402 segmented origin expression ("foo+42") had better be in the right
2403 segment or the .org is ignored.
2405 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2406 we never know sub-segment sizes when we are reading code. BSD
2407 will crash trying to emit negative numbers of filler bytes in
2408 certain .orgs. We don't crash, but see as-write for that code.
2410 Don't make frag if need_pass_2==1. */
2411 segment = get_known_segmented_expression (&exp);
2412 if (*input_line_pointer == ',')
2414 input_line_pointer++;
2415 temp_fill = get_absolute_expression ();
2421 do_org (segment, &exp, temp_fill);
2423 demand_empty_rest_of_line ();
2426 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2427 called by the obj-format routine which handles section changing
2428 when in MRI mode. It will create a new section, and return it. It
2429 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2430 'M' (mixed), or 'R' (romable). If BFD_ASSEMBLER is defined, the
2431 flags will be set in the section. */
2435 char *type ATTRIBUTE_UNUSED;
2445 name = input_line_pointer;
2446 if (! isdigit ((unsigned char) *name))
2447 c = get_symbol_end ();
2452 ++input_line_pointer;
2454 while (isdigit ((unsigned char) *input_line_pointer));
2455 c = *input_line_pointer;
2456 *input_line_pointer = '\0';
2459 name = xstrdup (name);
2461 *input_line_pointer = c;
2463 seg = subseg_new (name, 0);
2465 if (*input_line_pointer == ',')
2469 ++input_line_pointer;
2470 align = get_absolute_expression ();
2471 record_alignment (seg, align);
2475 if (*input_line_pointer == ',')
2477 c = *++input_line_pointer;
2478 c = toupper ((unsigned char) c);
2479 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2482 as_bad (_("unrecognized section type"));
2483 ++input_line_pointer;
2485 #ifdef BFD_ASSEMBLER
2489 flags = SEC_NO_FLAGS;
2491 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2492 else if (*type == 'D' || *type == 'M')
2493 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2494 else if (*type == 'R')
2495 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2496 if (flags != SEC_NO_FLAGS)
2498 if (! bfd_set_section_flags (stdoutput, seg, flags))
2499 as_warn (_("error setting flags for \"%s\": %s"),
2500 bfd_section_name (stdoutput, seg),
2501 bfd_errmsg (bfd_get_error ()));
2507 /* Ignore the HP type. */
2508 if (*input_line_pointer == ',')
2509 input_line_pointer += 2;
2511 demand_empty_rest_of_line ();
2513 #else /* ! TC_M68K */
2522 name = input_line_pointer;
2523 c = get_symbol_end ();
2525 name = xstrdup (name);
2527 *input_line_pointer = c;
2529 seg = subseg_new (name, 0);
2531 if (*input_line_pointer != ',')
2537 ++input_line_pointer;
2539 sectype = input_line_pointer;
2540 c = get_symbol_end ();
2541 if (*sectype == '\0')
2543 else if (strcasecmp (sectype, "text") == 0)
2545 else if (strcasecmp (sectype, "data") == 0)
2547 else if (strcasecmp (sectype, "romdata") == 0)
2550 as_warn (_("unrecognized section type `%s'"), sectype);
2551 *input_line_pointer = c;
2554 if (*input_line_pointer == ',')
2558 ++input_line_pointer;
2560 seccmd = input_line_pointer;
2561 c = get_symbol_end ();
2562 if (strcasecmp (seccmd, "absolute") == 0)
2564 as_bad (_("absolute sections are not supported"));
2565 *input_line_pointer = c;
2566 ignore_rest_of_line ();
2569 else if (strcasecmp (seccmd, "align") == 0)
2573 *input_line_pointer = c;
2574 align = get_absolute_expression ();
2575 record_alignment (seg, align);
2579 as_warn (_("unrecognized section command `%s'"), seccmd);
2580 *input_line_pointer = c;
2584 demand_empty_rest_of_line ();
2586 #else /* ! TC_I960 */
2587 /* The MRI assembler seems to use different forms of .sect for
2588 different targets. */
2589 as_bad ("MRI mode not supported for this target");
2590 ignore_rest_of_line ();
2591 #endif /* ! TC_I960 */
2592 #endif /* ! TC_M68K */
2595 /* Handle the .print pseudo-op. */
2599 int ignore ATTRIBUTE_UNUSED;
2604 s = demand_copy_C_string (&len);
2606 demand_empty_rest_of_line ();
2609 /* Handle the .purgem pseudo-op. */
2613 int ignore ATTRIBUTE_UNUSED;
2615 if (is_it_end_of_statement ())
2617 demand_empty_rest_of_line ();
2627 name = input_line_pointer;
2628 c = get_symbol_end ();
2629 delete_macro (name);
2630 *input_line_pointer = c;
2633 while (*input_line_pointer++ == ',');
2635 --input_line_pointer;
2636 demand_empty_rest_of_line ();
2639 /* Handle the .rept pseudo-op. */
2643 int ignore ATTRIBUTE_UNUSED;
2649 count = get_absolute_expression ();
2652 if (! buffer_and_nest ("REPT", "ENDR", &one, get_line_sb))
2654 as_bad (_("rept without endr"));
2660 sb_add_sb (&many, &one);
2664 input_scrub_include_sb (&many, input_line_pointer);
2666 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2669 /* Handle the .equ, .equiv and .set directives. If EQUIV is 1, then
2670 this is .equiv, and it is an error if the symbol is already
2677 register char *name;
2678 register char delim;
2679 register char *end_name;
2680 register symbolS *symbolP;
2683 * Especial apologies for the random logic:
2684 * this just grew, and could be parsed much more simply!
2687 name = input_line_pointer;
2688 delim = get_symbol_end ();
2689 end_name = input_line_pointer;
2693 if (*input_line_pointer != ',')
2696 as_bad (_("Expected comma after name \"%s\""), name);
2698 ignore_rest_of_line ();
2702 input_line_pointer++;
2705 if (name[0] == '.' && name[1] == '\0')
2707 /* Turn '. = mumble' into a .org mumble */
2708 register segT segment;
2711 segment = get_known_segmented_expression (&exp);
2714 do_org (segment, &exp, 0);
2720 if ((symbolP = symbol_find (name)) == NULL
2721 && (symbolP = md_undefined_symbol (name)) == NULL)
2724 /* When doing symbol listings, play games with dummy fragments living
2725 outside the normal fragment chain to record the file and line info
2727 if (listing & LISTING_SYMBOLS)
2729 extern struct list_info_struct *listing_tail;
2730 fragS *dummy_frag = (fragS *) xmalloc (sizeof(fragS));
2731 memset (dummy_frag, 0, sizeof(fragS));
2732 dummy_frag->fr_type = rs_fill;
2733 dummy_frag->line = listing_tail;
2734 symbolP = symbol_new (name, undefined_section, 0, dummy_frag);
2735 dummy_frag->fr_symbol = symbolP;
2739 symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag);
2742 /* "set" symbols are local unless otherwise specified. */
2743 SF_SET_LOCAL (symbolP);
2744 #endif /* OBJ_COFF */
2746 } /* make a new symbol */
2748 symbol_table_insert (symbolP);
2753 && S_IS_DEFINED (symbolP)
2754 && S_GET_SEGMENT (symbolP) != reg_section)
2755 as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP));
2757 pseudo_set (symbolP);
2758 demand_empty_rest_of_line ();
2772 #ifdef md_flush_pending_output
2773 md_flush_pending_output ();
2777 stop = mri_comment_field (&stopc);
2779 /* In m68k MRI mode, we need to align to a word boundary, unless
2781 if (flag_m68k_mri && mult > 1)
2783 if (now_seg == absolute_section)
2785 abs_section_offset += abs_section_offset & 1;
2786 if (line_label != NULL)
2787 S_SET_VALUE (line_label, abs_section_offset);
2789 else if (mri_common_symbol != NULL)
2793 val = S_GET_VALUE (mri_common_symbol);
2796 S_SET_VALUE (mri_common_symbol, val + 1);
2797 if (line_label != NULL)
2799 expressionS *symexp;
2801 symexp = symbol_get_value_expression (line_label);
2802 know (symexp->X_op == O_symbol);
2803 know (symexp->X_add_symbol == mri_common_symbol);
2804 symexp->X_add_number += 1;
2810 do_align (1, (char *) NULL, 0, 0);
2811 if (line_label != NULL)
2813 symbol_set_frag (line_label, frag_now);
2814 S_SET_VALUE (line_label, frag_now_fix ());
2824 if (*input_line_pointer == ',')
2826 ++input_line_pointer;
2831 val.X_op = O_constant;
2832 val.X_add_number = 0;
2835 if (val.X_op != O_constant
2836 || val.X_add_number < - 0x80
2837 || val.X_add_number > 0xff
2838 || (mult != 0 && mult != 1 && val.X_add_number != 0))
2840 if (exp.X_op != O_constant)
2841 as_bad (_("Unsupported variable size or fill value"));
2848 bytes = mult * exp.X_add_number;
2849 for (i = 0; i < exp.X_add_number; i++)
2850 emit_expr (&val, mult);
2855 if (exp.X_op == O_constant)
2859 repeat = exp.X_add_number;
2866 as_warn (_(".space repeat count is zero, ignored"));
2867 else if (repeat < 0)
2868 as_warn (_(".space repeat count is negative, ignored"));
2872 /* If we are in the absolute section, just bump the offset. */
2873 if (now_seg == absolute_section)
2875 abs_section_offset += repeat;
2879 /* If we are secretly in an MRI common section, then
2880 creating space just increases the size of the common
2882 if (mri_common_symbol != NULL)
2884 S_SET_VALUE (mri_common_symbol,
2885 S_GET_VALUE (mri_common_symbol) + repeat);
2890 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
2891 (offsetT) repeat, (char *) 0);
2895 if (now_seg == absolute_section)
2897 as_bad (_("space allocation too complex in absolute section"));
2898 subseg_set (text_section, 0);
2900 if (mri_common_symbol != NULL)
2902 as_bad (_("space allocation too complex in common section"));
2903 mri_common_symbol = NULL;
2906 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
2907 make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
2911 *p = val.X_add_number;
2916 /* In MRI mode, after an odd number of bytes, we must align to an
2917 even word boundary, unless the next instruction is a dc.b, ds.b
2919 if (flag_mri && (bytes & 1) != 0)
2920 mri_pending_align = 1;
2922 demand_empty_rest_of_line ();
2925 mri_comment_end (stop, stopc);
2928 /* This is like s_space, but the value is a floating point number with
2929 the given precision. This is for the MRI dcb.s pseudo-op and
2933 s_float_space (float_type)
2938 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
2943 stop = mri_comment_field (&stopc);
2945 count = get_absolute_expression ();
2948 if (*input_line_pointer != ',')
2950 as_bad (_("missing value"));
2951 ignore_rest_of_line ();
2953 mri_comment_end (stop, stopc);
2957 ++input_line_pointer;
2961 /* Skip any 0{letter} that may be present. Don't even check if the
2962 * letter is legal. */
2963 if (input_line_pointer[0] == '0'
2964 && isalpha ((unsigned char) input_line_pointer[1]))
2965 input_line_pointer += 2;
2967 /* Accept :xxxx, where the x's are hex digits, for a floating point
2968 with the exact digits specified. */
2969 if (input_line_pointer[0] == ':')
2971 flen = hex_float (float_type, temp);
2974 ignore_rest_of_line ();
2976 mri_comment_end (stop, stopc);
2984 err = md_atof (float_type, temp, &flen);
2985 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
2989 as_bad (_("Bad floating literal: %s"), err);
2990 ignore_rest_of_line ();
2992 mri_comment_end (stop, stopc);
2997 while (--count >= 0)
3001 p = frag_more (flen);
3002 memcpy (p, temp, (unsigned int) flen);
3005 demand_empty_rest_of_line ();
3008 mri_comment_end (stop, stopc);
3011 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
3015 int ignore ATTRIBUTE_UNUSED;
3021 stop = mri_comment_field (&stopc);
3022 abs_section_offset = get_absolute_expression ();
3023 subseg_set (absolute_section, 0);
3024 demand_empty_rest_of_line ();
3026 mri_comment_end (stop, stopc);
3031 int ignore ATTRIBUTE_UNUSED;
3035 temp = get_absolute_expression ();
3036 subseg_set (text_section, (subsegT) temp);
3037 demand_empty_rest_of_line ();
3039 const_flag &= ~IN_DEFAULT_SECTION;
3045 demand_empty_rest_of_line ()
3048 if (is_end_of_line[(unsigned char) *input_line_pointer])
3050 input_line_pointer++;
3054 ignore_rest_of_line ();
3056 /* Return having already swallowed end-of-line. */
3057 } /* Return pointing just after end-of-line. */
3060 ignore_rest_of_line () /* For suspect lines: gives warning. */
3062 if (!is_end_of_line[(unsigned char) *input_line_pointer])
3064 if (isprint ((unsigned char) *input_line_pointer))
3065 as_bad (_("Rest of line ignored. First ignored character is `%c'."),
3066 *input_line_pointer);
3068 as_bad (_("Rest of line ignored. First ignored character valued 0x%x."),
3069 *input_line_pointer);
3070 while (input_line_pointer < buffer_limit
3071 && !is_end_of_line[(unsigned char) *input_line_pointer])
3073 input_line_pointer++;
3076 input_line_pointer++; /* Return pointing just after end-of-line. */
3077 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3081 discard_rest_of_line ()
3083 while (input_line_pointer < buffer_limit
3084 && !is_end_of_line[(unsigned char) *input_line_pointer])
3086 input_line_pointer++;
3088 input_line_pointer++; /* Return pointing just after end-of-line. */
3089 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3095 * In: Pointer to a symbol.
3096 * Input_line_pointer->expression.
3098 * Out: Input_line_pointer->just after any whitespace after expression.
3099 * Tried to set symbol to value of expression.
3100 * Will change symbols type, value, and frag;
3103 pseudo_set (symbolP)
3107 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3109 #endif /* OBJ_AOUT or OBJ_BOUT */
3111 know (symbolP); /* NULL pointer is logic error. */
3112 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3113 ext = S_IS_EXTERNAL (symbolP);
3114 #endif /* OBJ_AOUT or OBJ_BOUT */
3116 (void) expression (&exp);
3118 if (exp.X_op == O_illegal)
3119 as_bad (_("illegal expression; zero assumed"));
3120 else if (exp.X_op == O_absent)
3121 as_bad (_("missing expression; zero assumed"));
3122 else if (exp.X_op == O_big)
3124 if (exp.X_add_number > 0)
3125 as_bad (_("bignum invalid; zero assumed"));
3127 as_bad (_("floating point number invalid; zero assumed"));
3129 else if (exp.X_op == O_subtract
3130 && (S_GET_SEGMENT (exp.X_add_symbol)
3131 == S_GET_SEGMENT (exp.X_op_symbol))
3132 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
3133 && (symbol_get_frag (exp.X_add_symbol)
3134 == symbol_get_frag (exp.X_op_symbol)))
3136 exp.X_op = O_constant;
3137 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
3138 - S_GET_VALUE (exp.X_op_symbol));
3146 exp.X_add_number = 0;
3149 S_SET_SEGMENT (symbolP, absolute_section);
3150 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3152 S_SET_EXTERNAL (symbolP);
3154 S_CLEAR_EXTERNAL (symbolP);
3155 #endif /* OBJ_AOUT or OBJ_BOUT */
3156 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3157 if (exp.X_op != O_constant)
3158 symbol_set_frag (symbolP, &zero_address_frag);
3162 S_SET_SEGMENT (symbolP, reg_section);
3163 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3164 symbol_set_frag (symbolP, &zero_address_frag);
3168 if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section
3169 || exp.X_add_number != 0)
3170 symbol_set_value_expression (symbolP, &exp);
3171 else if (symbol_section_p (symbolP))
3172 as_bad ("invalid attempt to set value of section symbol");
3175 symbolS *s = exp.X_add_symbol;
3177 S_SET_SEGMENT (symbolP, S_GET_SEGMENT (s));
3178 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3180 S_SET_EXTERNAL (symbolP);
3182 S_CLEAR_EXTERNAL (symbolP);
3183 #endif /* OBJ_AOUT or OBJ_BOUT */
3184 S_SET_VALUE (symbolP,
3185 exp.X_add_number + S_GET_VALUE (s));
3186 symbol_set_frag (symbolP, symbol_get_frag (s));
3187 copy_symbol_attributes (symbolP, s);
3192 /* The value is some complex expression.
3193 FIXME: Should we set the segment to anything? */
3194 symbol_set_value_expression (symbolP, &exp);
3202 * CONStruct more frag of .bytes, or .words etc.
3203 * Should need_pass_2 be 1 then emit no frag(s).
3204 * This understands EXPRESSIONS.
3208 * This has a split personality. We use expression() to read the
3209 * value. We can detect if the value won't fit in a byte or word.
3210 * But we can't detect if expression() discarded significant digits
3211 * in the case of a long. Not worth the crocks required to fix it.
3214 /* Select a parser for cons expressions. */
3216 /* Some targets need to parse the expression in various fancy ways.
3217 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3218 (for example, the HPPA does this). Otherwise, you can define
3219 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3220 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3221 are defined, which is the normal case, then only simple expressions
3225 parse_mri_cons PARAMS ((expressionS *exp, unsigned int nbytes));
3227 #ifndef TC_PARSE_CONS_EXPRESSION
3228 #ifdef BITFIELD_CONS_EXPRESSIONS
3229 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3231 parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes));
3233 #ifdef REPEAT_CONS_EXPRESSIONS
3234 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3236 parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes));
3239 /* If we haven't gotten one yet, just call expression. */
3240 #ifndef TC_PARSE_CONS_EXPRESSION
3241 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3245 /* worker to do .byte etc statements */
3246 /* clobbers input_line_pointer, checks */
3249 cons_worker (nbytes, rva)
3250 register int nbytes; /* 1=.byte, 2=.word, 4=.long */
3258 #ifdef md_flush_pending_output
3259 md_flush_pending_output ();
3263 stop = mri_comment_field (&stopc);
3265 if (is_it_end_of_statement ())
3267 demand_empty_rest_of_line ();
3269 mri_comment_end (stop, stopc);
3273 #ifdef md_cons_align
3274 md_cons_align (nbytes);
3281 parse_mri_cons (&exp, (unsigned int) nbytes);
3283 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3287 if (exp.X_op == O_symbol)
3288 exp.X_op = O_symbol_rva;
3290 as_fatal (_("rva without symbol"));
3292 emit_expr (&exp, (unsigned int) nbytes);
3295 while (*input_line_pointer++ == ',');
3297 /* In MRI mode, after an odd number of bytes, we must align to an
3298 even word boundary, unless the next instruction is a dc.b, ds.b
3300 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3301 mri_pending_align = 1;
3303 input_line_pointer--; /* Put terminator back into stream. */
3305 demand_empty_rest_of_line ();
3308 mri_comment_end (stop, stopc);
3316 cons_worker (size, 0);
3323 cons_worker (size, 1);
3326 /* Put the contents of expression EXP into the object file using
3327 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3330 emit_expr (exp, nbytes)
3332 unsigned int nbytes;
3336 valueT extra_digit = 0;
3338 /* Don't do anything if we are going to make another pass. */
3344 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3345 appear as a four byte positive constant in the .line section,
3346 followed by a 2 byte 0xffff. Look for that case here. */
3348 static int dwarf_line = -1;
3350 if (strcmp (segment_name (now_seg), ".line") != 0)
3352 else if (dwarf_line >= 0
3354 && exp->X_op == O_constant
3355 && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
3356 listing_source_line ((unsigned int) dwarf_line);
3357 else if (nbytes == 4
3358 && exp->X_op == O_constant
3359 && exp->X_add_number >= 0)
3360 dwarf_line = exp->X_add_number;
3365 /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
3366 appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
3367 AT_sibling (0x12) followed by a four byte address of the sibling
3368 followed by a 2 byte AT_name (0x38) followed by the name of the
3369 file. We look for that case here. */
3371 static int dwarf_file = 0;
3373 if (strcmp (segment_name (now_seg), ".debug") != 0)
3375 else if (dwarf_file == 0
3377 && exp->X_op == O_constant
3378 && exp->X_add_number == 0x11)
3380 else if (dwarf_file == 1
3382 && exp->X_op == O_constant
3383 && exp->X_add_number == 0x12)
3385 else if (dwarf_file == 2
3388 else if (dwarf_file == 3
3390 && exp->X_op == O_constant
3391 && exp->X_add_number == 0x38)
3396 /* The variable dwarf_file_string tells stringer that the string
3397 may be the name of the source file. */
3398 if (dwarf_file == 4)
3399 dwarf_file_string = 1;
3401 dwarf_file_string = 0;
3406 if (check_eh_frame (exp, &nbytes))
3411 /* Allow `.word 0' in the absolute section. */
3412 if (now_seg == absolute_section)
3414 if (op != O_constant || exp->X_add_number != 0)
3415 as_bad (_("attempt to store value in absolute section"));
3416 abs_section_offset += nbytes;
3420 /* Handle a negative bignum. */
3422 && exp->X_add_number == 0
3423 && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
3424 && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
3427 unsigned long carry;
3429 exp = symbol_get_value_expression (exp->X_add_symbol);
3431 /* Negate the bignum: one's complement each digit and add 1. */
3433 for (i = 0; i < exp->X_add_number; i++)
3437 next = (((~ (generic_bignum[i] & LITTLENUM_MASK))
3440 generic_bignum[i] = next & LITTLENUM_MASK;
3441 carry = next >> LITTLENUM_NUMBER_OF_BITS;
3444 /* We can ignore any carry out, because it will be handled by
3445 extra_digit if it is needed. */
3447 extra_digit = (valueT) -1;
3451 if (op == O_absent || op == O_illegal)
3453 as_warn (_("zero assumed for missing expression"));
3454 exp->X_add_number = 0;
3457 else if (op == O_big && exp->X_add_number <= 0)
3459 as_bad (_("floating point number invalid; zero assumed"));
3460 exp->X_add_number = 0;
3463 else if (op == O_register)
3465 as_warn (_("register value used as expression"));
3469 p = frag_more ((int) nbytes);
3471 #ifndef WORKING_DOT_WORD
3472 /* If we have the difference of two symbols in a word, save it on
3473 the broken_words list. See the code in write.c. */
3474 if (op == O_subtract && nbytes == 2)
3476 struct broken_word *x;
3478 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
3479 x->next_broken_word = broken_words;
3482 x->subseg = now_subseg;
3484 x->word_goes_here = p;
3486 x->add = exp->X_add_symbol;
3487 x->sub = exp->X_op_symbol;
3488 x->addnum = exp->X_add_number;
3495 /* If we have an integer, but the number of bytes is too large to
3496 pass to md_number_to_chars, handle it as a bignum. */
3497 if (op == O_constant && nbytes > sizeof (valueT))
3502 if (! exp->X_unsigned && exp->X_add_number < 0)
3503 extra_digit = (valueT) -1;
3504 val = (valueT) exp->X_add_number;
3508 generic_bignum[gencnt] = val & LITTLENUM_MASK;
3509 val >>= LITTLENUM_NUMBER_OF_BITS;
3513 op = exp->X_op = O_big;
3514 exp->X_add_number = gencnt;
3517 if (op == O_constant)
3519 register valueT get;
3520 register valueT use;
3521 register valueT mask;
3523 register valueT unmask;
3525 /* JF << of >= number of bits in the object is undefined. In
3526 particular SPARC (Sun 4) has problems */
3527 if (nbytes >= sizeof (valueT))
3530 if (nbytes > sizeof (valueT))
3533 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3537 /* Don't store these bits. */
3538 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
3539 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3542 unmask = ~mask; /* Do store these bits. */
3545 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3546 mask = ~(unmask >> 1); /* Includes sign bit now. */
3549 get = exp->X_add_number;
3551 if ((get & mask) != 0
3552 && ((get & mask) != mask
3553 || (get & hibit) == 0))
3554 { /* Leading bits contain both 0s & 1s. */
3555 as_warn (_("Value 0x%lx truncated to 0x%lx."),
3556 (unsigned long) get, (unsigned long) use);
3558 /* put bytes in right order. */
3559 md_number_to_chars (p, use, (int) nbytes);
3561 else if (op == O_big)
3564 LITTLENUM_TYPE *nums;
3566 know (nbytes % CHARS_PER_LITTLENUM == 0);
3568 size = exp->X_add_number * CHARS_PER_LITTLENUM;
3571 as_warn (_("Bignum truncated to %d bytes"), nbytes);
3575 if (target_big_endian)
3577 while (nbytes > size)
3579 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3580 nbytes -= CHARS_PER_LITTLENUM;
3581 p += CHARS_PER_LITTLENUM;
3584 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
3588 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3589 size -= CHARS_PER_LITTLENUM;
3590 p += CHARS_PER_LITTLENUM;
3595 nums = generic_bignum;
3598 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3600 size -= CHARS_PER_LITTLENUM;
3601 p += CHARS_PER_LITTLENUM;
3602 nbytes -= CHARS_PER_LITTLENUM;
3607 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3608 nbytes -= CHARS_PER_LITTLENUM;
3609 p += CHARS_PER_LITTLENUM;
3615 memset (p, 0, nbytes);
3617 /* Now we need to generate a fixS to record the symbol value.
3618 This is easy for BFD. For other targets it can be more
3619 complex. For very complex cases (currently, the HPPA and
3620 NS32K), you can define TC_CONS_FIX_NEW to do whatever you
3621 want. For simpler cases, you can define TC_CONS_RELOC to be
3622 the name of the reloc code that should be stored in the fixS.
3623 If neither is defined, the code uses NO_RELOC if it is
3624 defined, and otherwise uses 0. */
3626 #ifdef BFD_ASSEMBLER
3627 #ifdef TC_CONS_FIX_NEW
3628 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
3631 bfd_reloc_code_real_type r;
3648 as_bad (_("unsupported BFD relocation size %u"), nbytes);
3652 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp,
3657 #ifdef TC_CONS_FIX_NEW
3658 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
3660 /* Figure out which reloc number to use. Use TC_CONS_RELOC if
3661 it is defined, otherwise use NO_RELOC if it is defined,
3663 #ifndef TC_CONS_RELOC
3665 #define TC_CONS_RELOC NO_RELOC
3667 #define TC_CONS_RELOC 0
3670 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0,
3672 #endif /* TC_CONS_FIX_NEW */
3673 #endif /* BFD_ASSEMBLER */
3677 #ifdef BITFIELD_CONS_EXPRESSIONS
3679 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3680 w:x,y:z, where w and y are bitwidths and x and y are values. They
3681 then pack them all together. We do a little better in that we allow
3682 them in words, longs, etc. and we'll pack them in target byte order
3685 The rules are: pack least significat bit first, if a field doesn't
3686 entirely fit, put it in the next unit. Overflowing the bitfield is
3687 explicitly *not* even a warning. The bitwidth should be considered
3690 To use this function the tc-XXX.h file should define
3691 BITFIELD_CONS_EXPRESSIONS. */
3694 parse_bitfield_cons (exp, nbytes)
3696 unsigned int nbytes;
3698 unsigned int bits_available = BITS_PER_CHAR * nbytes;
3699 char *hold = input_line_pointer;
3701 (void) expression (exp);
3703 if (*input_line_pointer == ':')
3709 unsigned long width;
3711 if (*input_line_pointer != ':')
3713 input_line_pointer = hold;
3715 } /* next piece is not a bitfield */
3717 /* In the general case, we can't allow
3718 full expressions with symbol
3719 differences and such. The relocation
3720 entries for symbols not defined in this
3721 assembly would require arbitrary field
3722 widths, positions, and masks which most
3723 of our current object formats don't
3726 In the specific case where a symbol
3727 *is* defined in this assembly, we
3728 *could* build fixups and track it, but
3729 this could lead to confusion for the
3730 backends. I'm lazy. I'll take any
3731 SEG_ABSOLUTE. I think that means that
3732 you can use a previous .set or
3733 .equ type symbol. xoxorich. */
3735 if (exp->X_op == O_absent)
3737 as_warn (_("using a bit field width of zero"));
3738 exp->X_add_number = 0;
3739 exp->X_op = O_constant;
3740 } /* implied zero width bitfield */
3742 if (exp->X_op != O_constant)
3744 *input_line_pointer = '\0';
3745 as_bad (_("field width \"%s\" too complex for a bitfield"), hold);
3746 *input_line_pointer = ':';
3747 demand_empty_rest_of_line ();
3751 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
3753 as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"),
3754 width, nbytes, (BITS_PER_CHAR * nbytes));
3755 width = BITS_PER_CHAR * nbytes;
3758 if (width > bits_available)
3760 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
3761 input_line_pointer = hold;
3762 exp->X_add_number = value;
3766 hold = ++input_line_pointer; /* skip ':' */
3768 (void) expression (exp);
3769 if (exp->X_op != O_constant)
3771 char cache = *input_line_pointer;
3773 *input_line_pointer = '\0';
3774 as_bad (_("field value \"%s\" too complex for a bitfield"), hold);
3775 *input_line_pointer = cache;
3776 demand_empty_rest_of_line ();
3780 value |= ((~(-1 << width) & exp->X_add_number)
3781 << ((BITS_PER_CHAR * nbytes) - bits_available));
3783 if ((bits_available -= width) == 0
3784 || is_it_end_of_statement ()
3785 || *input_line_pointer != ',')
3788 } /* all the bitfields we're gonna get */
3790 hold = ++input_line_pointer;
3791 (void) expression (exp);
3792 } /* forever loop */
3794 exp->X_add_number = value;
3795 exp->X_op = O_constant;
3796 exp->X_unsigned = 1;
3797 } /* if looks like a bitfield */
3798 } /* parse_bitfield_cons() */
3800 #endif /* BITFIELD_CONS_EXPRESSIONS */
3802 /* Handle an MRI style string expression. */
3805 parse_mri_cons (exp, nbytes)
3807 unsigned int nbytes;
3809 if (*input_line_pointer != '\''
3810 && (input_line_pointer[1] != '\''
3811 || (*input_line_pointer != 'A'
3812 && *input_line_pointer != 'E')))
3813 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3817 unsigned int result = 0;
3819 /* An MRI style string. Cut into as many bytes as will fit into
3820 a nbyte chunk, left justify if necessary, and separate with
3821 commas so we can try again later. */
3822 if (*input_line_pointer == 'A')
3823 ++input_line_pointer;
3824 else if (*input_line_pointer == 'E')
3826 as_bad (_("EBCDIC constants are not supported"));
3827 ++input_line_pointer;
3830 input_line_pointer++;
3831 for (scan = 0; scan < nbytes; scan++)
3833 if (*input_line_pointer == '\'')
3835 if (input_line_pointer[1] == '\'')
3837 input_line_pointer++;
3842 result = (result << 8) | (*input_line_pointer++);
3846 while (scan < nbytes)
3851 /* Create correct expression */
3852 exp->X_op = O_constant;
3853 exp->X_add_number = result;
3854 /* Fake it so that we can read the next char too */
3855 if (input_line_pointer[0] != '\'' ||
3856 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
3858 input_line_pointer -= 2;
3859 input_line_pointer[0] = ',';
3860 input_line_pointer[1] = '\'';
3863 input_line_pointer++;
3867 #ifdef REPEAT_CONS_EXPRESSIONS
3869 /* Parse a repeat expression for cons. This is used by the MIPS
3870 assembler. The format is NUMBER:COUNT; NUMBER appears in the
3871 object file COUNT times.
3873 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
3876 parse_repeat_cons (exp, nbytes)
3878 unsigned int nbytes;
3885 if (*input_line_pointer != ':')
3887 /* No repeat count. */
3891 ++input_line_pointer;
3892 expression (&count);
3893 if (count.X_op != O_constant
3894 || count.X_add_number <= 0)
3896 as_warn (_("Unresolvable or nonpositive repeat count; using 1"));
3900 /* The cons function is going to output this expression once. So we
3901 output it count - 1 times. */
3902 for (i = count.X_add_number - 1; i > 0; i--)
3903 emit_expr (exp, nbytes);
3906 #endif /* REPEAT_CONS_EXPRESSIONS */
3908 /* Parse a floating point number represented as a hex constant. This
3909 permits users to specify the exact bits they want in the floating
3913 hex_float (float_type, bytes)
3947 as_bad (_("Unknown floating type type '%c'"), float_type);
3951 /* It would be nice if we could go through expression to parse the
3952 hex constant, but if we get a bignum it's a pain to sort it into
3953 the buffer correctly. */
3955 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
3959 /* The MRI assembler accepts arbitrary underscores strewn about
3960 through the hex constant, so we ignore them as well. */
3961 if (*input_line_pointer == '_')
3963 ++input_line_pointer;
3969 as_warn (_("Floating point constant too large"));
3972 d = hex_value (*input_line_pointer) << 4;
3973 ++input_line_pointer;
3974 while (*input_line_pointer == '_')
3975 ++input_line_pointer;
3976 if (hex_p (*input_line_pointer))
3978 d += hex_value (*input_line_pointer);
3979 ++input_line_pointer;
3981 if (target_big_endian)
3984 bytes[length - i - 1] = d;
3990 if (target_big_endian)
3991 memset (bytes + i, 0, length - i);
3993 memset (bytes, 0, length - i);
4002 * CONStruct some more frag chars of .floats .ffloats etc.
4003 * Makes 0 or more new frags.
4004 * If need_pass_2 == 1, no frags are emitted.
4005 * This understands only floating literals, not expressions. Sorry.
4007 * A floating constant is defined by atof_generic(), except it is preceded
4008 * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
4009 * reading, I decided to be incompatible. This always tries to give you
4010 * rounded bits to the precision of the pseudo-op. Former AS did premature
4011 * truncatation, restored noisy bits instead of trailing 0s AND gave you
4012 * a choice of 2 flavours of noise according to which of 2 floating-point
4013 * scanners you directed AS to use.
4015 * In: input_line_pointer->whitespace before, or '0' of flonum.
4020 float_cons (float_type)
4021 /* Clobbers input_line-pointer, checks end-of-line. */
4022 register int float_type; /* 'f':.ffloat ... 'F':.float ... */
4025 int length; /* Number of chars in an object. */
4026 register char *err; /* Error from scanning floating literal. */
4027 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
4029 if (is_it_end_of_statement ())
4031 demand_empty_rest_of_line ();
4035 #ifdef md_flush_pending_output
4036 md_flush_pending_output ();
4041 /* input_line_pointer->1st char of a flonum (we hope!). */
4044 /* Skip any 0{letter} that may be present. Don't even check if the
4045 * letter is legal. Someone may invent a "z" format and this routine
4046 * has no use for such information. Lusers beware: you get
4047 * diagnostics if your input is ill-conditioned.
4049 if (input_line_pointer[0] == '0'
4050 && isalpha ((unsigned char) input_line_pointer[1]))
4051 input_line_pointer += 2;
4053 /* Accept :xxxx, where the x's are hex digits, for a floating
4054 point with the exact digits specified. */
4055 if (input_line_pointer[0] == ':')
4057 ++input_line_pointer;
4058 length = hex_float (float_type, temp);
4061 ignore_rest_of_line ();
4067 err = md_atof (float_type, temp, &length);
4068 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
4072 as_bad (_("Bad floating literal: %s"), err);
4073 ignore_rest_of_line ();
4084 #ifdef REPEAT_CONS_EXPRESSIONS
4085 if (*input_line_pointer == ':')
4087 expressionS count_exp;
4089 ++input_line_pointer;
4090 expression (&count_exp);
4091 if (count_exp.X_op != O_constant
4092 || count_exp.X_add_number <= 0)
4094 as_warn (_("unresolvable or nonpositive repeat count; using 1"));
4097 count = count_exp.X_add_number;
4101 while (--count >= 0)
4103 p = frag_more (length);
4104 memcpy (p, temp, (unsigned int) length);
4109 while (*input_line_pointer++ == ',');
4111 --input_line_pointer; /* Put terminator back into stream. */
4112 demand_empty_rest_of_line ();
4113 } /* float_cons() */
4115 /* Return the size of a LEB128 value */
4118 sizeof_sleb128 (value)
4121 register int size = 0;
4122 register unsigned byte;
4126 byte = (value & 0x7f);
4127 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4128 Fortunately, we can structure things so that the extra work reduces
4129 to a noop on systems that do things "properly". */
4130 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4133 while (!(((value == 0) && ((byte & 0x40) == 0))
4134 || ((value == -1) && ((byte & 0x40) != 0))));
4140 sizeof_uleb128 (value)
4143 register int size = 0;
4144 register unsigned byte;
4148 byte = (value & 0x7f);
4158 sizeof_leb128 (value, sign)
4163 return sizeof_sleb128 ((offsetT) value);
4165 return sizeof_uleb128 (value);
4168 /* Output a LEB128 value. */
4171 output_sleb128 (p, value)
4175 register char *orig = p;
4180 unsigned byte = (value & 0x7f);
4182 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4183 Fortunately, we can structure things so that the extra work reduces
4184 to a noop on systems that do things "properly". */
4185 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4187 more = !((((value == 0) && ((byte & 0x40) == 0))
4188 || ((value == -1) && ((byte & 0x40) != 0))));
4200 output_uleb128 (p, value)
4208 unsigned byte = (value & 0x7f);
4211 /* More bytes to follow. */
4222 output_leb128 (p, value, sign)
4228 return output_sleb128 (p, (offsetT) value);
4230 return output_uleb128 (p, value);
4233 /* Do the same for bignums. We combine sizeof with output here in that
4234 we don't output for NULL values of P. It isn't really as critical as
4235 for "normal" values that this be streamlined. */
4238 output_big_sleb128 (p, bignum, size)
4240 LITTLENUM_TYPE *bignum;
4248 /* Strip leading sign extensions off the bignum. */
4249 while (size > 0 && bignum[size-1] == (LITTLENUM_TYPE)-1)
4254 if (loaded < 7 && size > 0)
4256 val |= (*bignum << loaded);
4257 loaded += 8 * CHARS_PER_LITTLENUM;
4268 if ((val == 0 && (byte & 0x40) == 0)
4269 || (~(val | ~(((valueT)1 << loaded) - 1)) == 0
4270 && (byte & 0x40) != 0))
4278 while (byte & 0x80);
4284 output_big_uleb128 (p, bignum, size)
4286 LITTLENUM_TYPE *bignum;
4294 /* Strip leading zeros off the bignum. */
4295 /* XXX: Is this needed? */
4296 while (size > 0 && bignum[size-1] == 0)
4301 if (loaded < 7 && size > 0)
4303 val |= (*bignum << loaded);
4304 loaded += 8 * CHARS_PER_LITTLENUM;
4313 if (size > 0 || val)
4320 while (byte & 0x80);
4326 output_big_leb128 (p, bignum, size, sign)
4328 LITTLENUM_TYPE *bignum;
4332 return output_big_sleb128 (p, bignum, size);
4334 return output_big_uleb128 (p, bignum, size);
4337 /* Generate the appropriate fragments for a given expression to emit a
4341 emit_leb128_expr(exp, sign)
4345 operatorT op = exp->X_op;
4347 if (op == O_absent || op == O_illegal)
4349 as_warn (_("zero assumed for missing expression"));
4350 exp->X_add_number = 0;
4353 else if (op == O_big && exp->X_add_number <= 0)
4355 as_bad (_("floating point number invalid; zero assumed"));
4356 exp->X_add_number = 0;
4359 else if (op == O_register)
4361 as_warn (_("register value used as expression"));
4365 if (op == O_constant)
4367 /* If we've got a constant, emit the thing directly right now. */
4369 valueT value = exp->X_add_number;
4373 size = sizeof_leb128 (value, sign);
4374 p = frag_more (size);
4375 output_leb128 (p, value, sign);
4377 else if (op == O_big)
4379 /* O_big is a different sort of constant. */
4384 size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
4385 p = frag_more (size);
4386 output_big_leb128 (p, generic_bignum, exp->X_add_number, sign);
4390 /* Otherwise, we have to create a variable sized fragment and
4391 resolve things later. */
4393 frag_var (rs_leb128, sizeof_uleb128 (~(valueT)0), 0, sign,
4394 make_expr_symbol (exp), 0, (char *) NULL);
4398 /* Parse the .sleb128 and .uleb128 pseudos. */
4408 emit_leb128_expr (&exp, sign);
4409 } while (*input_line_pointer++ == ',');
4411 input_line_pointer--;
4412 demand_empty_rest_of_line ();
4418 * We read 0 or more ',' separated, double-quoted strings.
4420 * Caller should have checked need_pass_2 is FALSE because we don't check it.
4425 stringer (append_zero) /* Worker to do .ascii etc statements. */
4426 /* Checks end-of-line. */
4427 register int append_zero; /* 0: don't append '\0', else 1 */
4429 register unsigned int c;
4432 #ifdef md_flush_pending_output
4433 md_flush_pending_output ();
4437 * The following awkward logic is to parse ZERO or more strings,
4438 * comma separated. Recall a string expression includes spaces
4439 * before the opening '\"' and spaces after the closing '\"'.
4440 * We fake a leading ',' if there is (supposed to be)
4441 * a 1st, expression. We keep demanding expressions for each
4444 if (is_it_end_of_statement ())
4446 c = 0; /* Skip loop. */
4447 ++input_line_pointer; /* Compensate for end of loop. */
4451 c = ','; /* Do loop. */
4453 while (c == ',' || c == '<' || c == '"')
4456 switch (*input_line_pointer)
4459 ++input_line_pointer; /*->1st char of string. */
4460 start = input_line_pointer;
4461 while (is_a_char (c = next_char_of_string ()))
4463 FRAG_APPEND_1_CHAR (c);
4467 FRAG_APPEND_1_CHAR (0);
4469 know (input_line_pointer[-1] == '\"');
4473 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
4474 will emit .string with a filename in the .debug section
4475 after a sequence of constants. See the comment in
4476 emit_expr for the sequence. emit_expr will set
4477 dwarf_file_string to non-zero if this string might be a
4478 source file name. */
4479 if (strcmp (segment_name (now_seg), ".debug") != 0)
4480 dwarf_file_string = 0;
4481 else if (dwarf_file_string)
4483 c = input_line_pointer[-1];
4484 input_line_pointer[-1] = '\0';
4485 listing_source_file (start);
4486 input_line_pointer[-1] = c;
4493 input_line_pointer++;
4494 c = get_single_number ();
4495 FRAG_APPEND_1_CHAR (c);
4496 if (*input_line_pointer != '>')
4498 as_bad (_("Expected <nn>"));
4500 input_line_pointer++;
4503 input_line_pointer++;
4507 c = *input_line_pointer;
4510 demand_empty_rest_of_line ();
4513 /* FIXME-SOMEDAY: I had trouble here on characters with the
4514 high bits set. We'll probably also have trouble with
4515 multibyte chars, wide chars, etc. Also be careful about
4516 returning values bigger than 1 byte. xoxorich. */
4519 next_char_of_string ()
4521 register unsigned int c;
4523 c = *input_line_pointer++ & CHAR_MASK;
4531 as_warn (_("Unterminated string: Newline inserted."));
4532 bump_line_counters ();
4535 #ifndef NO_STRING_ESCAPES
4537 switch (c = *input_line_pointer++)
4565 break; /* As itself. */
4581 for (i = 0, number = 0; isdigit (c) && i < 3; c = *input_line_pointer++, i++)
4583 number = number * 8 + c - '0';
4587 --input_line_pointer;
4596 c = *input_line_pointer++;
4597 while (isxdigit (c))
4600 number = number * 16 + c - '0';
4601 else if (isupper (c))
4602 number = number * 16 + c - 'A' + 10;
4604 number = number * 16 + c - 'a' + 10;
4605 c = *input_line_pointer++;
4608 --input_line_pointer;
4613 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
4614 as_warn (_("Unterminated string: Newline inserted."));
4616 bump_line_counters ();
4621 #ifdef ONLY_STANDARD_ESCAPES
4622 as_bad (_("Bad escaped character in string, '?' assumed"));
4624 #endif /* ONLY_STANDARD_ESCAPES */
4627 } /* switch on escaped char */
4629 #endif /* ! defined (NO_STRING_ESCAPES) */
4633 } /* switch on char */
4635 } /* next_char_of_string() */
4638 get_segmented_expression (expP)
4639 register expressionS *expP;
4641 register segT retval;
4643 retval = expression (expP);
4644 if (expP->X_op == O_illegal
4645 || expP->X_op == O_absent
4646 || expP->X_op == O_big)
4648 as_bad (_("expected address expression; zero assumed"));
4649 expP->X_op = O_constant;
4650 expP->X_add_number = 0;
4651 retval = absolute_section;
4657 get_known_segmented_expression (expP)
4658 register expressionS *expP;
4660 register segT retval;
4662 if ((retval = get_segmented_expression (expP)) == undefined_section)
4664 /* There is no easy way to extract the undefined symbol from the
4666 if (expP->X_add_symbol != NULL
4667 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
4668 as_warn (_("symbol \"%s\" undefined; zero assumed"),
4669 S_GET_NAME (expP->X_add_symbol));
4671 as_warn (_("some symbol undefined; zero assumed"));
4672 retval = absolute_section;
4673 expP->X_op = O_constant;
4674 expP->X_add_number = 0;
4676 know (retval == absolute_section || SEG_NORMAL (retval));
4678 } /* get_known_segmented_expression() */
4681 get_absolute_expression ()
4686 if (exp.X_op != O_constant)
4688 if (exp.X_op != O_absent)
4689 as_bad (_("bad or irreducible absolute expression; zero assumed"));
4690 exp.X_add_number = 0;
4692 return exp.X_add_number;
4695 char /* return terminator */
4696 get_absolute_expression_and_terminator (val_pointer)
4697 long *val_pointer; /* return value of expression */
4699 /* FIXME: val_pointer should probably be offsetT *. */
4700 *val_pointer = (long) get_absolute_expression ();
4701 return (*input_line_pointer++);
4705 * demand_copy_C_string()
4707 * Like demand_copy_string, but return NULL if the string contains any '\0's.
4708 * Give a warning if that happens.
4711 demand_copy_C_string (len_pointer)
4716 if ((s = demand_copy_string (len_pointer)) != 0)
4720 for (len = *len_pointer; len > 0; len--)
4727 as_bad (_("This string may not contain \'\\0\'"));
4735 * demand_copy_string()
4737 * Demand string, but return a safe (=private) copy of the string.
4738 * Return NULL if we can't read a string here.
4741 demand_copy_string (lenP)
4744 register unsigned int c;
4750 if (*input_line_pointer == '\"')
4752 input_line_pointer++; /* Skip opening quote. */
4754 while (is_a_char (c = next_char_of_string ()))
4756 obstack_1grow (¬es, c);
4759 /* JF this next line is so demand_copy_C_string will return a
4760 null terminated string. */
4761 obstack_1grow (¬es, '\0');
4762 retval = obstack_finish (¬es);
4766 as_warn (_("Missing string"));
4768 ignore_rest_of_line ();
4772 } /* demand_copy_string() */
4775 * is_it_end_of_statement()
4777 * In: Input_line_pointer->next character.
4779 * Do: Skip input_line_pointer over all whitespace.
4781 * Out: 1 if input_line_pointer->end-of-line.
4784 is_it_end_of_statement ()
4787 return (is_end_of_line[(unsigned char) *input_line_pointer]);
4788 } /* is_it_end_of_statement() */
4791 equals (sym_name, reassign)
4795 register symbolS *symbolP; /* symbol we are working with */
4799 input_line_pointer++;
4800 if (*input_line_pointer == '=')
4801 input_line_pointer++;
4803 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
4804 input_line_pointer++;
4807 stop = mri_comment_field (&stopc);
4809 if (sym_name[0] == '.' && sym_name[1] == '\0')
4811 /* Turn '. = mumble' into a .org mumble */
4812 register segT segment;
4815 segment = get_known_segmented_expression (&exp);
4817 do_org (segment, &exp, 0);
4821 symbolP = symbol_find_or_make (sym_name);
4822 /* Permit register names to be redefined. */
4824 && S_IS_DEFINED (symbolP)
4825 && S_GET_SEGMENT (symbolP) != reg_section)
4826 as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP));
4827 pseudo_set (symbolP);
4832 ignore_rest_of_line (); /* check garbage after the expression */
4833 mri_comment_end (stop, stopc);
4837 /* .include -- include a file at this point. */
4842 int arg ATTRIBUTE_UNUSED;
4850 if (! flag_m68k_mri)
4852 filename = demand_copy_string (&i);
4853 if (filename == NULL)
4855 /* demand_copy_string has already printed an error and
4856 called ignore_rest_of_line. */
4864 while (! is_end_of_line[(unsigned char) *input_line_pointer]
4865 && *input_line_pointer != ' '
4866 && *input_line_pointer != '\t')
4868 obstack_1grow (¬es, *input_line_pointer);
4869 ++input_line_pointer;
4872 obstack_1grow (¬es, '\0');
4873 filename = obstack_finish (¬es);
4874 while (! is_end_of_line[(unsigned char) *input_line_pointer])
4875 ++input_line_pointer;
4877 demand_empty_rest_of_line ();
4878 path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ );
4879 for (i = 0; i < include_dir_count; i++)
4881 strcpy (path, include_dirs[i]);
4883 strcat (path, filename);
4884 if (0 != (try = fopen (path, "r")))
4893 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
4894 register_dependency (path);
4895 newbuf = input_scrub_include_file (path, input_line_pointer);
4896 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
4900 add_include_dir (path)
4905 if (include_dir_count == 0)
4907 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
4908 include_dirs[0] = "."; /* Current dir */
4909 include_dir_count = 2;
4913 include_dir_count++;
4914 include_dirs = (char **) realloc (include_dirs,
4915 include_dir_count * sizeof (*include_dirs));
4918 include_dirs[include_dir_count - 1] = path; /* New one */
4921 if (i > include_dir_maxlen)
4922 include_dir_maxlen = i;
4923 } /* add_include_dir() */
4925 /* Output debugging information to denote the source file. */
4928 generate_file_debug ()
4930 if (debug_type == DEBUG_STABS)
4931 stabs_generate_asm_file ();
4934 /* Output line number debugging information for the current source line. */
4937 generate_lineno_debug ()
4939 #ifdef ECOFF_DEBUGGING
4940 /* ECOFF assemblers automatically generate debugging information.
4941 FIXME: This should probably be handled elsewhere. */
4942 if (debug_type == DEBUG_UNSPECIFIED)
4944 if (ECOFF_DEBUGGING && ecoff_no_current_file ())
4945 debug_type = DEBUG_ECOFF;
4947 debug_type = DEBUG_NONE;
4953 case DEBUG_UNSPECIFIED:
4957 stabs_generate_asm_lineno ();
4960 ecoff_generate_asm_lineno ();
4969 /* Output debugging information to mark a function entry point or end point.
4970 END_P is zero for .func, and non-zero for .endfunc. */
4976 do_s_func (end_p, NULL);
4979 /* Subroutine of s_func so targets can choose a different default prefix.
4980 If DEFAULT_PREFIX is NULL, use the target's "leading char". */
4983 do_s_func (end_p, default_prefix)
4985 const char *default_prefix;
4987 /* Record the current function so that we can issue an error message for
4988 misplaced .func,.endfunc, and also so that .endfunc needs no
4990 static char *current_name;
4991 static char *current_label;
4995 if (current_name == NULL)
4997 as_bad (_("missing .func"));
4998 ignore_rest_of_line ();
5002 if (debug_type == DEBUG_STABS)
5003 stabs_generate_asm_endfunc (current_name, current_label);
5005 current_name = current_label = NULL;
5012 if (current_name != NULL)
5014 as_bad (_(".endfunc missing for previous .func"));
5015 ignore_rest_of_line ();
5019 name = input_line_pointer;
5020 delim1 = get_symbol_end ();
5021 name = xstrdup (name);
5022 *input_line_pointer = delim1;
5024 if (*input_line_pointer != ',')
5027 asprintf (&label, "%s%s", default_prefix, name);
5030 char leading_char = 0;
5031 #ifdef BFD_ASSEMBLER
5032 leading_char = bfd_get_symbol_leading_char (stdoutput);
5034 /* Missing entry point, use function's name with the leading
5037 asprintf (&label, "%c%s", leading_char, name);
5044 ++input_line_pointer;
5046 label = input_line_pointer;
5047 delim2 = get_symbol_end ();
5048 label = xstrdup (label);
5049 *input_line_pointer = delim2;
5052 if (debug_type == DEBUG_STABS)
5053 stabs_generate_asm_func (name, label);
5055 current_name = name;
5056 current_label = label;
5059 demand_empty_rest_of_line ();
5064 int arg ATTRIBUTE_UNUSED;
5066 while (!is_end_of_line[(unsigned char) *input_line_pointer])
5068 ++input_line_pointer;
5070 ++input_line_pointer;
5075 read_print_statistics (file)
5078 hash_print_statistics (file, "pseudo-op table", po_hash);