1 /* read.c - read a source file -
2 Copyright (C) 1986, 87, 90, 91, 92, 93, 94, 95, 96, 1997
3 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. */
93 /* The a29k assembler does not permits labels to start with $. */
98 /* The Delta 68k assembler permits ~ at start of label names. */
102 /* used by is_... macros. our ctype[] */
105 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
106 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
107 0, 0, 0, 0, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
108 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
109 LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
110 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
111 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
112 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */
113 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
114 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
115 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
116 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
117 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
118 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
119 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
125 * Out: 1 if this character ends a line.
128 char is_end_of_line[256] =
131 99, _, _, _, _, _, _, _, _, _, 99, _, _, 99, _, _, /* @abcdefghijklmno */
133 99, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, _, /* @abcdefghijklmno */
135 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
137 _,99, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* _!"#$%&'()*+,-./ */
138 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0123456789:;<=>? */
140 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
141 _, _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, /* 0123456789:;<=>? */
143 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
144 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
145 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
146 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
147 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
148 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
149 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
150 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
151 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
155 /* Functions private to this file. */
157 static char *buffer; /* 1st char of each buffer of lines is here. */
158 static char *buffer_limit; /*->1 + last char in buffer. */
160 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1 in the
161 tc-<CPU>.h file. See the "Porting GAS" section of the internals manual. */
162 int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
164 static char *old_buffer; /* JF a hack */
165 static char *old_input;
166 static char *old_limit;
168 /* Variables for handling include file directory list. */
170 char **include_dirs; /* List of pointers to directories to
171 search for .include's */
172 int include_dir_count; /* How many are in the list */
173 int include_dir_maxlen = 1;/* Length of longest in list */
175 #ifndef WORKING_DOT_WORD
176 struct broken_word *broken_words;
177 int new_broken_words;
180 /* The current offset into the absolute section. We don't try to
181 build frags in the absolute section, since no data can be stored
182 there. We just keep track of the current offset. */
183 addressT abs_section_offset;
185 /* If this line had an MRI style label, it is stored in this variable.
186 This is used by some of the MRI pseudo-ops. */
189 /* This global variable is used to support MRI common sections. We
190 translate such sections into a common symbol. This variable is
191 non-NULL when we are in an MRI common section. */
192 symbolS *mri_common_symbol;
194 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
195 need to align to an even byte boundary unless the next pseudo-op is
196 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
198 static int mri_pending_align;
200 static void cons_worker PARAMS ((int, int));
201 static int scrub_from_string PARAMS ((char **));
202 static void do_align PARAMS ((int, char *, int, int));
203 static void s_align PARAMS ((int, int));
204 static int hex_float PARAMS ((int, char *));
205 static void do_org PARAMS ((segT, expressionS *, int));
206 char *demand_copy_string PARAMS ((int *lenP));
207 static segT get_segmented_expression PARAMS ((expressionS *expP));
208 static segT get_known_segmented_expression PARAMS ((expressionS * expP));
209 static void pobegin PARAMS ((void));
210 static int get_line_sb PARAMS ((sb *));
219 obj_read_begin_hook ();
221 /* Something close -- but not too close -- to a multiple of 1024.
222 The debugging malloc I'm using has 24 bytes of overhead. */
223 obstack_begin (¬es, chunksize);
224 obstack_begin (&cond_obstack, chunksize);
226 /* Use machine dependent syntax */
227 for (p = line_separator_chars; *p; p++)
228 is_end_of_line[(unsigned char) *p] = 1;
229 /* Use more. FIXME-SOMEDAY. */
235 /* set up pseudo-op tables */
237 static struct hash_control *po_hash;
239 static const pseudo_typeS potable[] =
241 {"abort", s_abort, 0},
242 {"align", s_align_ptwo, 0},
243 {"ascii", stringer, 0},
244 {"asciz", stringer, 1},
245 {"balign", s_align_bytes, 0},
246 {"balignw", s_align_bytes, -2},
247 {"balignl", s_align_bytes, -4},
251 {"common", s_mri_common, 0},
252 {"common.s", s_mri_common, 1},
256 {"dc.d", float_cons, 'd'},
258 {"dc.s", float_cons, 'f'},
260 {"dc.x", float_cons, 'x'},
262 {"dcb.b", s_space, 1},
263 {"dcb.d", s_float_space, 'd'},
264 {"dcb.l", s_space, 4},
265 {"dcb.s", s_float_space, 'f'},
266 {"dcb.w", s_space, 2},
267 {"dcb.x", s_float_space, 'x'},
269 {"ds.b", s_space, 1},
270 {"ds.d", s_space, 8},
271 {"ds.l", s_space, 4},
272 {"ds.p", s_space, 12},
273 {"ds.s", s_space, 4},
274 {"ds.w", s_space, 2},
275 {"ds.x", s_space, 12},
276 {"debug", s_ignore, 0},
281 {"double", float_cons, 'd'},
283 {"eject", listing_eject, 0}, /* Formfeed listing */
285 {"elsec", s_else, 0},
287 {"endc", s_endif, 0},
288 {"endif", s_endif, 0},
293 {"exitm", s_mexit, 0},
295 {"extern", s_ignore, 0}, /* We treat all undef as ext */
296 {"appfile", s_app_file, 1},
297 {"appline", s_app_line, 0},
299 {"file", s_app_file, 0},
301 {"float", float_cons, 'f'},
302 {"format", s_ignore, 0},
303 {"global", s_globl, 0},
304 {"globl", s_globl, 0},
306 {"if", s_if, (int) O_ne},
308 {"ifdef", s_ifdef, 0},
309 {"ifeq", s_if, (int) O_eq},
310 {"ifeqs", s_ifeqs, 0},
311 {"ifge", s_if, (int) O_ge},
312 {"ifgt", s_if, (int) O_gt},
313 {"ifle", s_if, (int) O_le},
314 {"iflt", s_if, (int) O_lt},
316 {"ifndef", s_ifdef, 1},
317 {"ifne", s_if, (int) O_ne},
318 {"ifnes", s_ifeqs, 1},
319 {"ifnotdef", s_ifdef, 1},
320 {"include", s_include, 0},
326 {"lcomm", s_lcomm, 0},
327 {"lflags", listing_flags, 0}, /* Listing flags */
328 {"linkonce", s_linkonce, 0},
329 {"list", listing_list, 1}, /* Turn listing on */
330 {"llen", listing_psize, 1},
333 {"macro", s_macro, 0},
334 {"mexit", s_mexit, 0},
336 {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
337 {"name", s_ignore, 0},
338 {"noformat", s_ignore, 0},
339 {"nolist", listing_list, 0}, /* Turn listing off */
340 {"nopage", listing_nopage, 0},
342 {"offset", s_struct, 0},
344 {"p2align", s_align_ptwo, 0},
345 {"p2alignw", s_align_ptwo, -2},
346 {"p2alignl", s_align_ptwo, -4},
347 {"page", listing_eject, 0},
348 {"plen", listing_psize, 0},
349 {"print", s_print, 0},
350 {"psize", listing_psize, 0}, /* set paper size */
351 {"purgem", s_purgem, 0},
356 {"sbttl", listing_title, 1}, /* Subtitle of listing */
361 {"single", float_cons, 'f'},
363 {"space", s_space, 0},
364 {"skip", s_space, 0},
365 {"sleb128", s_leb128, 1},
366 {"spc", s_ignore, 0},
367 {"stabd", s_stab, 'd'},
368 {"stabn", s_stab, 'n'},
369 {"stabs", s_stab, 's'},
370 {"string", stringer, 1},
371 {"struct", s_struct, 0},
375 /* This is for gcc to use. It's only just been added (2/94), so gcc
376 won't be able to use it for a while -- probably a year or more.
377 But once this has been released, check with gcc maintainers
378 before deleting it or even changing the spelling. */
379 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
380 /* If we're folding case -- done for some targets, not necessarily
381 all -- the above string in an input file will be converted to
382 this one. Match it either way... */
383 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
385 {"title", listing_title, 0}, /* Listing title */
386 {"ttl", listing_title, 0},
388 {"uleb128", s_leb128, 0},
392 {"xdef", s_globl, 0},
393 {"xref", s_ignore, 0},
394 {"xstabs", s_xstab, 's'},
396 {"zero", s_space, 0},
397 {NULL} /* end sentinel */
400 static int pop_override_ok = 0;
401 static const char *pop_table_name;
405 const pseudo_typeS *table;
408 const pseudo_typeS *pop;
409 for (pop = table; pop->poc_name; pop++)
411 errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
412 if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
413 as_fatal ("error constructing %s pseudo-op table: %s", pop_table_name,
418 #ifndef md_pop_insert
419 #define md_pop_insert() pop_insert(md_pseudo_table)
422 #ifndef obj_pop_insert
423 #define obj_pop_insert() pop_insert(obj_pseudo_table)
429 po_hash = hash_new ();
431 /* Do the target-specific pseudo ops. */
432 pop_table_name = "md";
435 /* Now object specific. Skip any that were in the target table. */
436 pop_table_name = "obj";
440 /* Now portable ones. Skip any that we've seen already. */
441 pop_table_name = "standard";
442 pop_insert (potable);
445 #define HANDLE_CONDITIONAL_ASSEMBLY() \
446 if (ignore_input ()) \
448 while (! is_end_of_line[(unsigned char) *input_line_pointer++]) \
449 if (input_line_pointer == buffer_limit) \
455 /* This function is used when scrubbing the characters between #APP
458 static char *scrub_string;
459 static char *scrub_string_end;
462 scrub_from_string (from)
467 *from = scrub_string;
468 size = scrub_string_end - scrub_string;
469 scrub_string = scrub_string_end;
473 /* read_a_source_file()
475 * We read the file, putting things into a web that
476 * represents what we have been reading.
479 read_a_source_file (name)
483 register char *s; /* string of symbol, '\0' appended */
487 buffer = input_scrub_new_file (name);
490 listing_newline (NULL);
491 register_dependency (name);
493 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
494 { /* We have another line to parse. */
495 know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */
496 contin: /* JF this goto is my fault I admit it.
497 Someone brave please re-write the whole
498 input section here? Pleeze??? */
499 while (input_line_pointer < buffer_limit)
501 /* We have more of this buffer to parse. */
504 * We now have input_line_pointer->1st char of next line.
505 * If input_line_pointer [-1] == '\n' then we just
506 * scanned another line: so bump line counters.
508 if (is_end_of_line[(unsigned char) input_line_pointer[-1]])
510 #ifdef md_start_line_hook
511 md_start_line_hook ();
514 if (input_line_pointer[-1] == '\n')
515 bump_line_counters ();
520 #ifdef LABELS_WITHOUT_COLONS
525 /* Text at the start of a line must be a label, we
526 run down and stick a colon in. */
527 if (is_name_beginner (*input_line_pointer))
529 char *line_start = input_line_pointer;
534 HANDLE_CONDITIONAL_ASSEMBLY ();
536 c = get_symbol_end ();
538 /* In MRI mode, the EQU and MACRO pseudoops must
539 be handled specially. */
543 char *rest = input_line_pointer + 1;
547 if (*rest == ' ' || *rest == '\t')
549 if ((strncasecmp (rest, "EQU", 3) == 0
550 || strncasecmp (rest, "SET", 3) == 0)
551 && (rest[3] == ' ' || rest[3] == '\t'))
553 input_line_pointer = rest + 3;
555 strncasecmp (rest, "SET", 3) == 0);
558 if (strncasecmp (rest, "MACRO", 5) == 0
561 || is_end_of_line[(unsigned char) rest[5]]))
565 /* In MRI mode, we need to handle the MACRO
566 pseudo-op specially: we don't want to put the
567 symbol in the symbol table. */
568 if (! mri_line_macro)
569 line_label = colon (line_start);
571 line_label = symbol_create (line_start,
576 *input_line_pointer = c;
578 input_line_pointer++;
584 * We are at the begining of a line, or similar place.
585 * We expect a well-formed assembler statement.
586 * A "symbol-name:" is a statement.
588 * Depending on what compiler is used, the order of these tests
589 * may vary to catch most common case 1st.
590 * Each test is independent of all other tests at the (top) level.
591 * PLEASE make a compiler that doesn't use this assembler.
592 * It is crufty to waste a compiler's time encoding things for this
593 * assembler, which then wastes more time decoding it.
594 * (And communicating via (linear) files is silly!
595 * If you must pass stuff, please pass a tree!)
597 if ((c = *input_line_pointer++) == '\t'
602 c = *input_line_pointer++;
604 know (c != ' '); /* No further leading whitespace. */
607 /* If listing is on, and we are expanding a macro, then give
608 the listing code the contents of the expanded line. */
611 if ((listing & LISTING_MACEXP) && macro_nest > 0)
616 /* Find the end of the current expanded macro line. */
617 for (s = input_line_pointer-1; *s ; ++s)
618 if (is_end_of_line[(unsigned char) *s])
621 /* Copy it for safe keeping. Also give an indication of
622 how much macro nesting is involved at this point. */
623 len = s - (input_line_pointer-1);
624 copy = (char *) xmalloc (len + macro_nest + 2);
625 memset (copy, '>', macro_nest);
626 copy[macro_nest] = ' ';
627 memcpy (copy + macro_nest + 1, input_line_pointer-1, len);
628 copy[macro_nest+1+len] = '\0';
630 /* Install the line with the listing facility. */
631 listing_newline (copy);
634 listing_newline (NULL);
639 * C is the 1st significant character.
640 * Input_line_pointer points after that character.
642 if (is_name_beginner (c))
644 /* want user-defined label or pseudo/opcode */
645 HANDLE_CONDITIONAL_ASSEMBLY ();
647 s = --input_line_pointer;
648 c = get_symbol_end (); /* name's delimiter */
650 * C is character after symbol.
651 * That character's place in the input line is now '\0'.
652 * S points to the beginning of the symbol.
653 * [In case of pseudo-op, s->'.'.]
654 * Input_line_pointer->'\0' where c was.
656 if (TC_START_LABEL(c, input_line_pointer))
660 char *rest = input_line_pointer + 1;
662 /* In MRI mode, \tsym: set 0 is permitted. */
666 if (*rest == ' ' || *rest == '\t')
668 if ((strncasecmp (rest, "EQU", 3) == 0
669 || strncasecmp (rest, "SET", 3) == 0)
670 && (rest[3] == ' ' || rest[3] == '\t'))
672 input_line_pointer = rest + 3;
678 line_label = colon (s); /* user-defined label */
679 *input_line_pointer++ = ':'; /* Put ':' back for error messages' sake. */
680 /* Input_line_pointer->after ':'. */
686 || ((c == ' ' || c == '\t')
687 && input_line_pointer[1] == '='
688 #ifdef TC_EQUAL_IN_INSN
689 && ! TC_EQUAL_IN_INSN (c, input_line_pointer)
694 demand_empty_rest_of_line ();
697 { /* expect pseudo-op or machine instruction */
700 #define IGNORE_OPCODE_CASE
701 #ifdef IGNORE_OPCODE_CASE
719 /* The MRI assembler and the m88k use pseudo-ops
721 pop = (pseudo_typeS *) hash_find (po_hash, s);
722 if (pop != NULL && pop->poc_handler == NULL)
727 || (! flag_m68k_mri && *s == '.'))
732 * WARNING: c has next char, which may be end-of-line.
733 * We lookup the pseudo-op table with s+1 because we
734 * already know that the pseudo-op begins with a '.'.
738 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
740 /* In MRI mode, we may need to insert an
741 automatic alignment directive. What a hack
743 if (mri_pending_align
745 || ! ((pop->poc_handler == cons
746 && pop->poc_val == 1)
747 || (pop->poc_handler == s_space
748 && pop->poc_val == 1)
749 #ifdef tc_conditional_pseudoop
750 || tc_conditional_pseudoop (pop)
752 || pop->poc_handler == s_if
753 || pop->poc_handler == s_ifdef
754 || pop->poc_handler == s_ifc
755 || pop->poc_handler == s_ifeqs
756 || pop->poc_handler == s_else
757 || pop->poc_handler == s_endif
758 || pop->poc_handler == s_globl
759 || pop->poc_handler == s_ignore)))
761 do_align (1, (char *) NULL, 0, 0);
762 mri_pending_align = 0;
763 if (line_label != NULL)
765 line_label->sy_frag = frag_now;
766 S_SET_VALUE (line_label, frag_now_fix ());
770 /* Print the error msg now, while we still can */
773 as_bad ("Unknown pseudo-op: `%s'", s);
774 *input_line_pointer = c;
779 /* Put it back for error messages etc. */
780 *input_line_pointer = c;
781 /* The following skip of whitespace is compulsory.
782 A well shaped space is sometimes all that separates
783 keyword from operands. */
784 if (c == ' ' || c == '\t')
785 input_line_pointer++;
787 * Input_line is restored.
788 * Input_line_pointer->1st non-blank char
789 * after pseudo-operation.
791 (*pop->poc_handler) (pop->poc_val);
793 /* If that was .end, just get out now. */
794 if (pop->poc_handler == s_end)
801 /* WARNING: c has char, which may be end-of-line. */
802 /* Also: input_line_pointer->`\0` where c was. */
803 *input_line_pointer = c;
804 while (!is_end_of_line[(unsigned char) *input_line_pointer]
806 #ifdef TC_EOL_IN_INSN
807 || TC_EOL_IN_INSN (input_line_pointer)
811 if (flag_m68k_mri && *input_line_pointer == '\'')
813 input_line_pointer++;
816 c = *input_line_pointer;
817 *input_line_pointer = '\0';
819 if (debug_type == DEBUG_STABS)
820 stabs_generate_asm_lineno ();
822 #ifdef OBJ_GENERATE_ASM_LINENO
823 #ifdef ECOFF_DEBUGGING
824 /* ECOFF assemblers automatically generate
825 debugging information. FIXME: This should
826 probably be handled elsewhere. */
827 if (debug_type == DEBUG_NONE)
829 if (ecoff_no_current_file ())
830 debug_type = DEBUG_ECOFF;
833 if (debug_type == DEBUG_ECOFF)
838 as_where (&s, &lineno);
839 OBJ_GENERATE_ASM_LINENO (s, lineno);
849 if (check_macro (s, &out, '\0', &err))
853 *input_line_pointer++ = c;
854 input_scrub_include_sb (&out,
858 input_scrub_next_buffer (&input_line_pointer);
863 if (mri_pending_align)
865 do_align (1, (char *) NULL, 0, 0);
866 mri_pending_align = 0;
867 if (line_label != NULL)
869 line_label->sy_frag = frag_now;
870 S_SET_VALUE (line_label, frag_now_fix ());
874 md_assemble (s); /* Assemble 1 instruction. */
876 *input_line_pointer++ = c;
878 /* We resume loop AFTER the end-of-line from
883 } /* if (is_name_beginner(c) */
886 /* Empty statement? */
887 if (is_end_of_line[(unsigned char) c])
890 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB)
893 /* local label ("4:") */
894 char *backup = input_line_pointer;
896 HANDLE_CONDITIONAL_ASSEMBLY ();
900 while (isdigit (*input_line_pointer))
902 temp = (temp * 10) + *input_line_pointer - '0';
903 ++input_line_pointer;
904 } /* read the whole number */
906 if (LOCAL_LABELS_DOLLAR
907 && *input_line_pointer == '$'
908 && *(input_line_pointer + 1) == ':')
910 input_line_pointer += 2;
912 if (dollar_label_defined (temp))
914 as_fatal ("label \"%d$\" redefined", temp);
917 define_dollar_label (temp);
918 colon (dollar_label_name (temp, 0));
923 && *input_line_pointer++ == ':')
925 fb_label_instance_inc (temp);
926 colon (fb_label_name (temp, 0));
930 input_line_pointer = backup;
931 } /* local label ("4:") */
933 if (c && strchr (line_comment_chars, c))
934 { /* Its a comment. Better say APP or NO_APP */
938 unsigned int new_length;
941 bump_line_counters ();
942 s = input_line_pointer;
943 if (strncmp (s, "APP\n", 4))
944 continue; /* We ignore it */
947 ends = strstr (s, "#NO_APP\n");
951 unsigned int tmp_len;
954 /* The end of the #APP wasn't in this buffer. We
955 keep reading in buffers until we find the #NO_APP
956 that goes with this #APP There is one. The specs
958 tmp_len = buffer_limit - s;
959 tmp_buf = xmalloc (tmp_len + 1);
960 memcpy (tmp_buf, s, tmp_len);
963 new_tmp = input_scrub_next_buffer (&buffer);
967 buffer_limit = new_tmp;
968 input_line_pointer = buffer;
969 ends = strstr (buffer, "#NO_APP\n");
973 num = buffer_limit - buffer;
975 tmp_buf = xrealloc (tmp_buf, tmp_len + num);
976 memcpy (tmp_buf + tmp_len, buffer, num);
981 input_line_pointer = ends ? ends + 8 : NULL;
989 input_line_pointer = ends + 8;
993 scrub_string_end = ends;
995 new_length = ends - s;
996 new_buf = (char *) xmalloc (new_length);
1003 space = (new_buf + new_length) - new_tmp;
1004 size = do_scrub_chars (scrub_from_string, new_tmp, space);
1012 new_buf = xrealloc (new_buf, new_length + 100);
1013 new_tmp = new_buf + new_length;
1019 old_buffer = buffer;
1020 old_input = input_line_pointer;
1021 old_limit = buffer_limit;
1023 input_line_pointer = new_buf;
1024 buffer_limit = new_tmp;
1028 HANDLE_CONDITIONAL_ASSEMBLY ();
1030 #ifdef tc_unrecognized_line
1031 if (tc_unrecognized_line (c))
1035 /* as_warn("Junk character %d.",c); Now done by ignore_rest */
1036 input_line_pointer--; /* Report unknown char as ignored. */
1037 ignore_rest_of_line ();
1038 } /* while (input_line_pointer<buffer_limit) */
1040 #ifdef md_after_pass_hook
1041 md_after_pass_hook ();
1047 bump_line_counters ();
1050 buffer = old_buffer;
1051 input_line_pointer = old_input;
1052 buffer_limit = old_limit;
1057 } /* while (more buffers to scan) */
1064 input_scrub_close (); /* Close the input file */
1067 /* For most MRI pseudo-ops, the line actually ends at the first
1068 nonquoted space. This function looks for that point, stuffs a null
1069 in, and sets *STOPCP to the character that used to be there, and
1070 returns the location.
1072 Until I hear otherwise, I am going to assume that this is only true
1073 for the m68k MRI assembler. */
1076 mri_comment_field (stopcp)
1084 know (flag_m68k_mri);
1086 for (s = input_line_pointer;
1087 ((! is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
1092 inquote = ! inquote;
1102 for (s = input_line_pointer; ! is_end_of_line[(unsigned char) *s]; s++)
1112 /* Skip to the end of an MRI comment field. */
1115 mri_comment_end (stop, stopc)
1121 input_line_pointer = stop;
1123 while (! is_end_of_line[(unsigned char) *input_line_pointer])
1124 ++input_line_pointer;
1131 as_fatal (".abort detected. Abandoning ship.");
1134 /* Guts of .align directive. N is the power of two to which to align.
1135 FILL may be NULL, or it may point to the bytes of the fill pattern.
1136 LEN is the length of whatever FILL points to, if anything. MAX is
1137 the maximum number of characters to skip when doing the alignment,
1138 or 0 if there is no maximum. */
1141 do_align (n, fill, len, max)
1150 md_do_align (n, fill, len, max, just_record_alignment);
1157 #ifdef BFD_ASSEMBLER
1158 if ((bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE) != 0)
1163 if (now_seg != data_section && now_seg != bss_section)
1170 default_fill = NOP_OPCODE;
1173 fill = &default_fill;
1177 /* Only make a frag if we HAVE to. . . */
1178 if (n != 0 && !need_pass_2)
1181 frag_align (n, *fill, max);
1183 frag_align_pattern (n, fill, len, max);
1187 just_record_alignment:
1190 record_alignment (now_seg, n);
1193 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1194 (in bytes). A negative ARG is the negative of the length of the
1195 fill pattern. BYTES_P is non-zero if the alignment value should be
1196 interpreted as the byte boundary, rather than the power of 2. */
1199 s_align (arg, bytes_p)
1203 register unsigned int align;
1211 stop = mri_comment_field (&stopc);
1213 if (is_end_of_line[(unsigned char) *input_line_pointer])
1218 align = arg; /* Default value from pseudo-op table */
1222 align = get_absolute_expression ();
1228 /* Convert to a power of 2. */
1233 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1236 as_bad ("Alignment not a power of 2");
1244 as_bad ("Alignment too large: %u assumed", align);
1247 if (*input_line_pointer != ',')
1254 ++input_line_pointer;
1255 if (*input_line_pointer == ',')
1259 fill = get_absolute_expression ();
1264 if (*input_line_pointer != ',')
1268 ++input_line_pointer;
1269 max = get_absolute_expression ();
1276 as_warn ("expected fill pattern missing");
1277 do_align (align, (char *) NULL, 0, max);
1292 do_align (align, &fill_char, fill_len, max);
1298 if (fill_len > sizeof ab)
1300 md_number_to_chars (ab, fill, fill_len);
1301 do_align (align, ab, fill_len, max);
1306 mri_comment_end (stop, stopc);
1308 demand_empty_rest_of_line ();
1311 /* Handle the .align pseudo-op on machines where ".align 4" means
1312 align to a 4 byte boundary. */
1321 /* Handle the .align pseudo-op on machines where ".align 4" means align
1322 to a 2**4 boundary. */
1335 register char *name;
1339 register symbolS *symbolP;
1344 stop = mri_comment_field (&stopc);
1346 name = input_line_pointer;
1347 c = get_symbol_end ();
1348 /* just after name is now '\0' */
1349 p = input_line_pointer;
1352 if (*input_line_pointer != ',')
1354 as_bad ("Expected comma after symbol-name: rest of line ignored.");
1356 mri_comment_end (stop, stopc);
1357 ignore_rest_of_line ();
1360 input_line_pointer++; /* skip ',' */
1361 if ((temp = get_absolute_expression ()) < 0)
1363 as_warn (".COMMon length (%ld.) <0! Ignored.", (long) temp);
1365 mri_comment_end (stop, stopc);
1366 ignore_rest_of_line ();
1370 symbolP = symbol_find_or_make (name);
1372 if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP))
1374 as_bad ("Ignoring attempt to re-define symbol `%s'.",
1375 S_GET_NAME (symbolP));
1377 mri_comment_end (stop, stopc);
1378 ignore_rest_of_line ();
1381 if (S_GET_VALUE (symbolP))
1383 if (S_GET_VALUE (symbolP) != (valueT) temp)
1384 as_bad ("Length of .comm \"%s\" is already %ld. Not changed to %ld.",
1385 S_GET_NAME (symbolP),
1386 (long) S_GET_VALUE (symbolP),
1391 S_SET_VALUE (symbolP, (valueT) temp);
1392 S_SET_EXTERNAL (symbolP);
1396 extern int flag_one;
1397 if ( (!temp) || !flag_one)
1398 S_GET_OTHER(symbolP) = const_flag;
1400 #endif /* not OBJ_VMS */
1401 know (symbolP->sy_frag == &zero_address_frag);
1404 mri_comment_end (stop, stopc);
1406 demand_empty_rest_of_line ();
1409 /* The MRI COMMON pseudo-op. We handle this by creating a common
1410 symbol with the appropriate name. We make s_space do the right
1411 thing by increasing the size. */
1414 s_mri_common (small)
1431 stop = mri_comment_field (&stopc);
1435 name = input_line_pointer;
1436 if (! isdigit ((unsigned char) *name))
1437 c = get_symbol_end ();
1442 ++input_line_pointer;
1444 while (isdigit ((unsigned char) *input_line_pointer));
1445 c = *input_line_pointer;
1446 *input_line_pointer = '\0';
1448 if (line_label != NULL)
1450 alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
1451 + (input_line_pointer - name)
1453 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1458 sym = symbol_find_or_make (name);
1459 *input_line_pointer = c;
1463 if (*input_line_pointer != ',')
1467 ++input_line_pointer;
1468 align = get_absolute_expression ();
1471 if (S_IS_DEFINED (sym) && ! S_IS_COMMON (sym))
1473 as_bad ("attempt to re-define symbol `%s'", S_GET_NAME (sym));
1474 mri_comment_end (stop, stopc);
1475 ignore_rest_of_line ();
1479 S_SET_EXTERNAL (sym);
1480 mri_common_symbol = sym;
1484 S_SET_ALIGN (sym, align);
1487 if (line_label != NULL)
1489 line_label->sy_value.X_op = O_symbol;
1490 line_label->sy_value.X_add_symbol = sym;
1491 line_label->sy_value.X_add_number = S_GET_VALUE (sym);
1492 line_label->sy_frag = &zero_address_frag;
1493 S_SET_SEGMENT (line_label, expr_section);
1496 /* FIXME: We just ignore the small argument, which distinguishes
1497 COMMON and COMMON.S. I don't know what we can do about it. */
1499 /* Ignore the type and hptype. */
1500 if (*input_line_pointer == ',')
1501 input_line_pointer += 2;
1502 if (*input_line_pointer == ',')
1503 input_line_pointer += 2;
1505 mri_comment_end (stop, stopc);
1507 demand_empty_rest_of_line ();
1517 temp = get_absolute_expression ();
1518 if (flag_readonly_data_in_text)
1520 section = text_section;
1524 section = data_section;
1526 subseg_set (section, (subsegT) temp);
1531 demand_empty_rest_of_line ();
1534 /* Handle the .appfile pseudo-op. This is automatically generated by
1535 do_scrub_chars when a preprocessor # line comment is seen with a
1536 file name. This default definition may be overridden by the object
1537 or CPU specific pseudo-ops. This function is also the default
1538 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1542 s_app_file (appfile)
1548 /* Some assemblers tolerate immediately following '"' */
1549 if ((s = demand_copy_string (&length)) != 0)
1551 /* If this is a fake .appfile, a fake newline was inserted into
1552 the buffer. Passing -2 to new_logical_line tells it to
1555 = (! new_logical_line (s, appfile ? -2 : -1) && appfile);
1557 /* In MRI mode, the preprocessor may have inserted an extraneous
1560 && *input_line_pointer == '\''
1561 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1562 ++input_line_pointer;
1564 demand_empty_rest_of_line ();
1569 listing_source_file (s);
1571 register_dependency (s);
1579 /* Handle the .appline pseudo-op. This is automatically generated by
1580 do_scrub_chars when a preprocessor # line comment is seen. This
1581 default definition may be overridden by the object or CPU specific
1590 /* The given number is that of the next line. */
1591 l = get_absolute_expression () - 1;
1593 /* Some of the back ends can't deal with non-positive line numbers.
1594 Besides, it's silly. */
1595 as_warn ("Line numbers must be positive; line number %d rejected.", l+1);
1598 new_logical_line ((char *) NULL, l);
1601 listing_source_line (l);
1604 demand_empty_rest_of_line ();
1607 /* Handle the .end pseudo-op. Actually, the real work is done in
1608 read_a_source_file. */
1616 /* The MRI assembler permits the start symbol to follow .end,
1617 but we don't support that. */
1619 if (! is_end_of_line[(unsigned char) *input_line_pointer]
1620 && *input_line_pointer != '*'
1621 && *input_line_pointer != '!')
1622 as_warn ("start address not supported");
1626 /* Handle the .err pseudo-op. */
1632 as_bad (".err encountered");
1633 demand_empty_rest_of_line ();
1636 /* Handle the MRI fail pseudo-op. */
1647 stop = mri_comment_field (&stopc);
1649 temp = get_absolute_expression ();
1651 as_warn (".fail %ld encountered", (long) temp);
1653 as_bad (".fail %ld encountered", (long) temp);
1656 mri_comment_end (stop, stopc);
1658 demand_empty_rest_of_line ();
1665 long temp_repeat = 0;
1667 register long temp_fill = 0;
1670 #ifdef md_flush_pending_output
1671 md_flush_pending_output ();
1674 temp_repeat = get_absolute_expression ();
1675 if (*input_line_pointer == ',')
1677 input_line_pointer++;
1678 temp_size = get_absolute_expression ();
1679 if (*input_line_pointer == ',')
1681 input_line_pointer++;
1682 temp_fill = get_absolute_expression ();
1685 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1686 #define BSD_FILL_SIZE_CROCK_8 (8)
1687 if (temp_size > BSD_FILL_SIZE_CROCK_8)
1689 as_warn (".fill size clamped to %d.", BSD_FILL_SIZE_CROCK_8);
1690 temp_size = BSD_FILL_SIZE_CROCK_8;
1694 as_warn ("Size negative: .fill ignored.");
1697 else if (temp_repeat <= 0)
1699 if (temp_repeat < 0)
1700 as_warn ("Repeat < 0, .fill ignored");
1704 if (temp_size && !need_pass_2)
1706 p = frag_var (rs_fill, (int) temp_size, (int) temp_size,
1707 (relax_substateT) 0, (symbolS *) 0, (offsetT) temp_repeat,
1709 memset (p, 0, (unsigned int) temp_size);
1710 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1711 * flavoured AS. The following bizzare behaviour is to be
1712 * compatible with above. I guess they tried to take up to 8
1713 * bytes from a 4-byte expression and they forgot to sign
1714 * extend. Un*x Sux. */
1715 #define BSD_FILL_SIZE_CROCK_4 (4)
1716 md_number_to_chars (p, (valueT) temp_fill,
1717 (temp_size > BSD_FILL_SIZE_CROCK_4
1718 ? BSD_FILL_SIZE_CROCK_4
1719 : (int) temp_size));
1720 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1721 * but emits no error message because it seems a legal thing to do.
1722 * It is a degenerate case of .fill but could be emitted by a compiler.
1725 demand_empty_rest_of_line ();
1739 stop = mri_comment_field (&stopc);
1743 name = input_line_pointer;
1744 c = get_symbol_end ();
1745 symbolP = symbol_find_or_make (name);
1746 *input_line_pointer = c;
1748 S_SET_EXTERNAL (symbolP);
1751 input_line_pointer++;
1753 if (*input_line_pointer == '\n')
1760 mri_comment_end (stop, stopc);
1762 demand_empty_rest_of_line ();
1765 /* Handle the MRI IRP and IRPC pseudo-ops. */
1777 as_where (&file, &line);
1780 while (! is_end_of_line[(unsigned char) *input_line_pointer])
1781 sb_add_char (&s, *input_line_pointer++);
1785 err = expand_irp (irpc, 0, &s, &out, get_line_sb, '\0');
1787 as_bad_where (file, line, "%s", err);
1791 input_scrub_include_sb (&out, input_line_pointer);
1793 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1796 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
1797 the section to only be linked once. However, this is not supported
1798 by most object file formats. This takes an optional argument,
1799 which is what to do about duplicates. */
1805 enum linkonce_type type;
1809 type = LINKONCE_DISCARD;
1811 if (! is_end_of_line[(unsigned char) *input_line_pointer])
1816 s = input_line_pointer;
1817 c = get_symbol_end ();
1818 if (strcasecmp (s, "discard") == 0)
1819 type = LINKONCE_DISCARD;
1820 else if (strcasecmp (s, "one_only") == 0)
1821 type = LINKONCE_ONE_ONLY;
1822 else if (strcasecmp (s, "same_size") == 0)
1823 type = LINKONCE_SAME_SIZE;
1824 else if (strcasecmp (s, "same_contents") == 0)
1825 type = LINKONCE_SAME_CONTENTS;
1827 as_warn ("unrecognized .linkonce type `%s'", s);
1829 *input_line_pointer = c;
1832 #ifdef obj_handle_link_once
1833 obj_handle_link_once (type);
1834 #else /* ! defined (obj_handle_link_once) */
1835 #ifdef BFD_ASSEMBLER
1839 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
1840 as_warn (".linkonce is not supported for this object file format");
1842 flags = bfd_get_section_flags (stdoutput, now_seg);
1843 flags |= SEC_LINK_ONCE;
1848 case LINKONCE_DISCARD:
1849 flags |= SEC_LINK_DUPLICATES_DISCARD;
1851 case LINKONCE_ONE_ONLY:
1852 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
1854 case LINKONCE_SAME_SIZE:
1855 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
1857 case LINKONCE_SAME_CONTENTS:
1858 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
1861 if (! bfd_set_section_flags (stdoutput, now_seg, flags))
1862 as_bad ("bfd_set_section_flags: %s",
1863 bfd_errmsg (bfd_get_error ()));
1865 #else /* ! defined (BFD_ASSEMBLER) */
1866 as_warn (".linkonce is not supported for this object file format");
1867 #endif /* ! defined (BFD_ASSEMBLER) */
1868 #endif /* ! defined (obj_handle_link_once) */
1870 demand_empty_rest_of_line ();
1874 s_lcomm_internal (needs_align, bytes_p)
1875 /* 1 if this was a ".bss" directive, which may require a 3rd argument
1876 (alignment); 0 if it was an ".lcomm" (2 args only) */
1878 /* 1 if the alignment value should be interpreted as the byte boundary,
1879 rather than the power of 2. */
1882 register char *name;
1886 register symbolS *symbolP;
1887 segT current_seg = now_seg;
1888 subsegT current_subseg = now_subseg;
1889 const int max_alignment = 15;
1891 segT bss_seg = bss_section;
1893 name = input_line_pointer;
1894 c = get_symbol_end ();
1895 p = input_line_pointer;
1899 /* Accept an optional comma after the name. The comma used to be
1900 required, but Irix 5 cc does not generate it. */
1901 if (*input_line_pointer == ',')
1903 ++input_line_pointer;
1907 if (*input_line_pointer == '\n')
1909 as_bad ("Missing size expression");
1913 if ((temp = get_absolute_expression ()) < 0)
1915 as_warn ("BSS length (%d.) <0! Ignored.", temp);
1916 ignore_rest_of_line ();
1920 #if defined (TC_MIPS) || defined (TC_ALPHA)
1921 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
1922 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
1924 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
1925 if (temp <= bfd_get_gp_size (stdoutput))
1927 bss_seg = subseg_new (".sbss", 1);
1928 seg_info (bss_seg)->bss = 1;
1929 #ifdef BFD_ASSEMBLER
1930 if (! bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
1931 as_warn ("error setting flags for \".sbss\": %s",
1932 bfd_errmsg (bfd_get_error ()));
1939 /* FIXME. This needs to be machine independent. */
1950 /* FIXME: This needs to be done in a more general fashion. */
1954 record_alignment(bss_seg, align);
1961 if (*input_line_pointer != ',')
1963 as_bad ("Expected comma after size");
1964 ignore_rest_of_line ();
1967 input_line_pointer++;
1969 if (*input_line_pointer == '\n')
1971 as_bad ("Missing alignment");
1974 align = get_absolute_expression ();
1977 /* Convert to a power of 2. */
1982 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1985 as_bad ("Alignment not a power of 2");
1989 if (align > max_alignment)
1991 align = max_alignment;
1992 as_warn ("Alignment too large: %d. assumed.", align);
1997 as_warn ("Alignment negative. 0 assumed.");
1999 record_alignment (bss_seg, align);
2000 } /* if needs align */
2003 /* Assume some objects may require alignment on some systems. */
2004 #if defined (TC_ALPHA) && ! defined (VMS)
2007 align = ffs (temp) - 1;
2008 if (temp % (1 << align))
2015 symbolP = symbol_find_or_make (name);
2019 #if defined(OBJ_AOUT) | defined(OBJ_BOUT)
2020 S_GET_OTHER (symbolP) == 0 &&
2021 S_GET_DESC (symbolP) == 0 &&
2022 #endif /* OBJ_AOUT or OBJ_BOUT */
2023 (S_GET_SEGMENT (symbolP) == bss_seg
2024 || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0)))
2028 subseg_set (bss_seg, 1);
2031 frag_align (align, 0, 0);
2032 /* detach from old frag */
2033 if (S_GET_SEGMENT (symbolP) == bss_seg)
2034 symbolP->sy_frag->fr_symbol = NULL;
2036 symbolP->sy_frag = frag_now;
2037 pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP,
2038 (offsetT) temp, (char *) 0);
2041 S_SET_SEGMENT (symbolP, bss_seg);
2044 /* The symbol may already have been created with a preceding
2045 ".globl" directive -- be careful not to step on storage class
2046 in that case. Otherwise, set it to static. */
2047 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
2049 S_SET_STORAGE_CLASS (symbolP, C_STAT);
2051 #endif /* OBJ_COFF */
2054 S_SET_SIZE (symbolP, temp);
2058 as_bad ("Ignoring attempt to re-define symbol `%s'.",
2059 S_GET_NAME (symbolP));
2061 subseg_set (current_seg, current_subseg);
2063 demand_empty_rest_of_line ();
2064 } /* s_lcomm_internal() */
2067 s_lcomm (needs_align)
2070 s_lcomm_internal (needs_align, 0);
2073 void s_lcomm_bytes (needs_align)
2076 s_lcomm_internal (needs_align, 1);
2083 register char *name;
2087 register symbolS *symbolP;
2089 /* we permit ANY defined expression: BSD4.2 demands constants */
2090 name = input_line_pointer;
2091 c = get_symbol_end ();
2092 p = input_line_pointer;
2095 if (*input_line_pointer != ',')
2098 as_bad ("Expected comma after name \"%s\"", name);
2100 ignore_rest_of_line ();
2103 input_line_pointer++;
2105 if (exp.X_op != O_constant
2106 && exp.X_op != O_register)
2108 as_bad ("bad expression");
2109 ignore_rest_of_line ();
2113 symbolP = symbol_find_or_make (name);
2115 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
2116 symbolP->sy_desc == 0) out of this test because coff doesn't have
2117 those fields, and I can't see when they'd ever be tripped. I
2118 don't think I understand why they were here so I may have
2119 introduced a bug. As recently as 1.37 didn't have this test
2120 anyway. xoxorich. */
2122 if (S_GET_SEGMENT (symbolP) == undefined_section
2123 && S_GET_VALUE (symbolP) == 0)
2125 /* The name might be an undefined .global symbol; be sure to
2126 keep the "external" bit. */
2127 S_SET_SEGMENT (symbolP,
2128 (exp.X_op == O_constant
2131 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2135 as_bad ("Symbol %s already defined", name);
2138 demand_empty_rest_of_line ();
2141 /* Read a line into an sb. */
2147 char quote1, quote2, inquote;
2149 if (input_line_pointer[-1] == '\n')
2150 bump_line_counters ();
2152 if (input_line_pointer >= buffer_limit)
2154 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2155 if (buffer_limit == 0)
2159 /* If app.c sets any other characters to LEX_IS_STRINGQUOTE, this
2160 code needs to be changed. */
2161 if (! flag_m68k_mri)
2169 #ifdef LEX_IS_STRINGQUOTE
2174 while (! is_end_of_line[(unsigned char) *input_line_pointer]
2175 || (inquote != '\0' && *input_line_pointer != '\n'))
2177 if (inquote == *input_line_pointer)
2179 else if (inquote == '\0')
2181 if (*input_line_pointer == quote1)
2183 else if (*input_line_pointer == quote2)
2186 sb_add_char (line, *input_line_pointer++);
2188 while (input_line_pointer < buffer_limit
2189 && is_end_of_line[(unsigned char) *input_line_pointer])
2191 if (input_line_pointer[-1] == '\n')
2192 bump_line_counters ();
2193 ++input_line_pointer;
2198 /* Define a macro. This is an interface to macro.c, which is shared
2199 between gas and gasp. */
2212 as_where (&file, &line);
2215 while (! is_end_of_line[(unsigned char) *input_line_pointer])
2216 sb_add_char (&s, *input_line_pointer++);
2219 if (line_label != NULL)
2220 sb_add_string (&label, S_GET_NAME (line_label));
2222 err = define_macro (0, &s, &label, get_line_sb, &name);
2224 as_bad_where (file, line, "%s", err);
2227 if (line_label != NULL)
2229 S_SET_SEGMENT (line_label, undefined_section);
2230 S_SET_VALUE (line_label, 0);
2231 line_label->sy_frag = &zero_address_frag;
2235 #ifdef NO_PSEUDO_DOT
2239 && hash_find (po_hash, name) != NULL)
2242 && hash_find (po_hash, name + 1) != NULL))
2243 as_warn ("attempt to redefine pseudo-op `%s' ignored",
2250 /* Handle the .mexit pseudo-op, which immediately exits a macro
2257 cond_exit_macro (macro_nest);
2258 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2261 /* Switch in and out of MRI mode. */
2269 on = get_absolute_expression ();
2270 old_flag = flag_mri;
2284 #ifdef MRI_MODE_CHANGE
2286 MRI_MODE_CHANGE (on);
2289 demand_empty_rest_of_line ();
2292 /* Handle changing the location counter. */
2295 do_org (segment, exp, fill)
2300 if (segment != now_seg && segment != absolute_section)
2301 as_bad ("invalid segment \"%s\"; segment \"%s\" assumed",
2302 segment_name (segment), segment_name (now_seg));
2304 if (now_seg == absolute_section)
2307 as_warn ("ignoring fill value in absolute section");
2308 if (exp->X_op != O_constant)
2310 as_bad ("only constant offsets supported in absolute section");
2311 exp->X_add_number = 0;
2313 abs_section_offset = exp->X_add_number;
2319 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp->X_add_symbol,
2320 exp->X_add_number, (char *) NULL);
2329 register segT segment;
2331 register long temp_fill;
2333 /* The m68k MRI assembler has a different meaning for .org. It
2334 means to create an absolute section at a given address. We can't
2335 support that--use a linker script instead. */
2338 as_bad ("MRI style ORG pseudo-op not supported");
2339 ignore_rest_of_line ();
2343 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2344 thing as a sub-segment-relative origin. Any absolute origin is
2345 given a warning, then assumed to be segment-relative. Any
2346 segmented origin expression ("foo+42") had better be in the right
2347 segment or the .org is ignored.
2349 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2350 we never know sub-segment sizes when we are reading code. BSD
2351 will crash trying to emit negative numbers of filler bytes in
2352 certain .orgs. We don't crash, but see as-write for that code.
2354 Don't make frag if need_pass_2==1. */
2355 segment = get_known_segmented_expression (&exp);
2356 if (*input_line_pointer == ',')
2358 input_line_pointer++;
2359 temp_fill = get_absolute_expression ();
2365 do_org (segment, &exp, temp_fill);
2367 demand_empty_rest_of_line ();
2370 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2371 called by the obj-format routine which handles section changing
2372 when in MRI mode. It will create a new section, and return it. It
2373 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2374 'M' (mixed), or 'R' (romable). If BFD_ASSEMBLER is defined, the
2375 flags will be set in the section. */
2389 name = input_line_pointer;
2390 if (! isdigit ((unsigned char) *name))
2391 c = get_symbol_end ();
2396 ++input_line_pointer;
2398 while (isdigit ((unsigned char) *input_line_pointer));
2399 c = *input_line_pointer;
2400 *input_line_pointer = '\0';
2403 name = xstrdup (name);
2405 *input_line_pointer = c;
2407 seg = subseg_new (name, 0);
2409 if (*input_line_pointer == ',')
2413 ++input_line_pointer;
2414 align = get_absolute_expression ();
2415 record_alignment (seg, align);
2419 if (*input_line_pointer == ',')
2421 c = *++input_line_pointer;
2422 c = toupper ((unsigned char) c);
2423 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2426 as_bad ("unrecognized section type");
2427 ++input_line_pointer;
2429 #ifdef BFD_ASSEMBLER
2433 flags = SEC_NO_FLAGS;
2435 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2436 else if (*type == 'D' || *type == 'M')
2437 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2438 else if (*type == 'R')
2439 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2440 if (flags != SEC_NO_FLAGS)
2442 if (! bfd_set_section_flags (stdoutput, seg, flags))
2443 as_warn ("error setting flags for \"%s\": %s",
2444 bfd_section_name (stdoutput, seg),
2445 bfd_errmsg (bfd_get_error ()));
2451 /* Ignore the HP type. */
2452 if (*input_line_pointer == ',')
2453 input_line_pointer += 2;
2455 demand_empty_rest_of_line ();
2457 #else /* ! TC_M68K */
2466 name = input_line_pointer;
2467 c = get_symbol_end ();
2469 name = xstrdup (name);
2471 *input_line_pointer = c;
2473 seg = subseg_new (name, 0);
2475 if (*input_line_pointer != ',')
2481 ++input_line_pointer;
2483 sectype = input_line_pointer;
2484 c = get_symbol_end ();
2485 if (*sectype == '\0')
2487 else if (strcasecmp (sectype, "text") == 0)
2489 else if (strcasecmp (sectype, "data") == 0)
2491 else if (strcasecmp (sectype, "romdata") == 0)
2494 as_warn ("unrecognized section type `%s'", sectype);
2495 *input_line_pointer = c;
2498 if (*input_line_pointer == ',')
2502 ++input_line_pointer;
2504 seccmd = input_line_pointer;
2505 c = get_symbol_end ();
2506 if (strcasecmp (seccmd, "absolute") == 0)
2508 as_bad ("absolute sections are not supported");
2509 *input_line_pointer = c;
2510 ignore_rest_of_line ();
2513 else if (strcasecmp (seccmd, "align") == 0)
2517 *input_line_pointer = c;
2518 align = get_absolute_expression ();
2519 record_alignment (seg, align);
2523 as_warn ("unrecognized section command `%s'", seccmd);
2524 *input_line_pointer = c;
2528 demand_empty_rest_of_line ();
2530 #else /* ! TC_I960 */
2531 /* The MRI assembler seems to use different forms of .sect for
2532 different targets. */
2534 #endif /* ! TC_I960 */
2535 #endif /* ! TC_M68K */
2538 /* Handle the .print pseudo-op. */
2547 s = demand_copy_C_string (&len);
2549 demand_empty_rest_of_line ();
2552 /* Handle the .purgem pseudo-op. */
2558 if (is_it_end_of_statement ())
2560 demand_empty_rest_of_line ();
2570 name = input_line_pointer;
2571 c = get_symbol_end ();
2572 delete_macro (name);
2573 *input_line_pointer = c;
2576 while (*input_line_pointer++ == ',');
2578 --input_line_pointer;
2579 demand_empty_rest_of_line ();
2582 /* Handle the .rept pseudo-op. */
2592 count = get_absolute_expression ();
2595 if (! buffer_and_nest ("REPT", "ENDR", &one, get_line_sb))
2597 as_bad ("rept without endr");
2603 sb_add_sb (&many, &one);
2607 input_scrub_include_sb (&many, input_line_pointer);
2609 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2612 /* Handle the .equ, .equiv and .set directives. If EQUIV is 1, then
2613 this is .equiv, and it is an error if the symbol is already
2620 register char *name;
2621 register char delim;
2622 register char *end_name;
2623 register symbolS *symbolP;
2626 * Especial apologies for the random logic:
2627 * this just grew, and could be parsed much more simply!
2630 name = input_line_pointer;
2631 delim = get_symbol_end ();
2632 end_name = input_line_pointer;
2636 if (*input_line_pointer != ',')
2639 as_bad ("Expected comma after name \"%s\"", name);
2641 ignore_rest_of_line ();
2645 input_line_pointer++;
2648 if (name[0] == '.' && name[1] == '\0')
2650 /* Turn '. = mumble' into a .org mumble */
2651 register segT segment;
2654 segment = get_known_segmented_expression (&exp);
2657 do_org (segment, &exp, 0);
2663 if ((symbolP = symbol_find (name)) == NULL
2664 && (symbolP = md_undefined_symbol (name)) == NULL)
2666 symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag);
2668 /* "set" symbols are local unless otherwise specified. */
2669 SF_SET_LOCAL (symbolP);
2670 #endif /* OBJ_COFF */
2672 } /* make a new symbol */
2674 symbol_table_insert (symbolP);
2679 && S_IS_DEFINED (symbolP)
2680 && S_GET_SEGMENT (symbolP) != reg_section)
2681 as_bad ("symbol `%s' already defined", S_GET_NAME (symbolP));
2683 pseudo_set (symbolP);
2684 demand_empty_rest_of_line ();
2698 #ifdef md_flush_pending_output
2699 md_flush_pending_output ();
2703 stop = mri_comment_field (&stopc);
2705 /* In m68k MRI mode, we need to align to a word boundary, unless
2707 if (flag_m68k_mri && mult > 1)
2709 if (now_seg == absolute_section)
2711 abs_section_offset += abs_section_offset & 1;
2712 if (line_label != NULL)
2713 S_SET_VALUE (line_label, abs_section_offset);
2715 else if (mri_common_symbol != NULL)
2719 val = S_GET_VALUE (mri_common_symbol);
2722 S_SET_VALUE (mri_common_symbol, val + 1);
2723 if (line_label != NULL)
2725 know (line_label->sy_value.X_op == O_symbol);
2726 know (line_label->sy_value.X_add_symbol == mri_common_symbol);
2727 line_label->sy_value.X_add_number += 1;
2733 do_align (1, (char *) NULL, 0, 0);
2734 if (line_label != NULL)
2736 line_label->sy_frag = frag_now;
2737 S_SET_VALUE (line_label, frag_now_fix ());
2747 if (*input_line_pointer == ',')
2749 ++input_line_pointer;
2754 val.X_op = O_constant;
2755 val.X_add_number = 0;
2758 if (val.X_op != O_constant
2759 || val.X_add_number < - 0x80
2760 || val.X_add_number > 0xff
2761 || (mult != 0 && mult != 1 && val.X_add_number != 0))
2763 if (exp.X_op != O_constant)
2764 as_bad ("Unsupported variable size or fill value");
2771 bytes = mult * exp.X_add_number;
2772 for (i = 0; i < exp.X_add_number; i++)
2773 emit_expr (&val, mult);
2778 if (exp.X_op == O_constant)
2782 repeat = exp.X_add_number;
2788 if (! flag_mri || repeat < 0)
2789 as_warn (".space repeat count is %s, ignored",
2790 repeat ? "negative" : "zero");
2794 /* If we are in the absolute section, just bump the offset. */
2795 if (now_seg == absolute_section)
2797 abs_section_offset += repeat;
2801 /* If we are secretly in an MRI common section, then
2802 creating space just increases the size of the common
2804 if (mri_common_symbol != NULL)
2806 S_SET_VALUE (mri_common_symbol,
2807 S_GET_VALUE (mri_common_symbol) + repeat);
2812 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
2813 (offsetT) repeat, (char *) 0);
2817 if (now_seg == absolute_section)
2819 as_bad ("space allocation too complex in absolute section");
2820 subseg_set (text_section, 0);
2822 if (mri_common_symbol != NULL)
2824 as_bad ("space allocation too complex in common section");
2825 mri_common_symbol = NULL;
2828 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
2829 make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
2833 *p = val.X_add_number;
2838 /* In MRI mode, after an odd number of bytes, we must align to an
2839 even word boundary, unless the next instruction is a dc.b, ds.b
2841 if (flag_mri && (bytes & 1) != 0)
2842 mri_pending_align = 1;
2845 mri_comment_end (stop, stopc);
2847 demand_empty_rest_of_line ();
2850 /* This is like s_space, but the value is a floating point number with
2851 the given precision. This is for the MRI dcb.s pseudo-op and
2855 s_float_space (float_type)
2860 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
2865 stop = mri_comment_field (&stopc);
2867 count = get_absolute_expression ();
2870 if (*input_line_pointer != ',')
2872 as_bad ("missing value");
2874 mri_comment_end (stop, stopc);
2875 ignore_rest_of_line ();
2879 ++input_line_pointer;
2883 /* Skip any 0{letter} that may be present. Don't even check if the
2884 * letter is legal. */
2885 if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1]))
2886 input_line_pointer += 2;
2888 /* Accept :xxxx, where the x's are hex digits, for a floating point
2889 with the exact digits specified. */
2890 if (input_line_pointer[0] == ':')
2892 flen = hex_float (float_type, temp);
2896 mri_comment_end (stop, stopc);
2897 ignore_rest_of_line ();
2905 err = md_atof (float_type, temp, &flen);
2906 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
2910 as_bad ("Bad floating literal: %s", err);
2912 mri_comment_end (stop, stopc);
2913 ignore_rest_of_line ();
2918 while (--count >= 0)
2922 p = frag_more (flen);
2923 memcpy (p, temp, (unsigned int) flen);
2927 mri_comment_end (stop, stopc);
2929 demand_empty_rest_of_line ();
2932 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
2942 stop = mri_comment_field (&stopc);
2943 abs_section_offset = get_absolute_expression ();
2944 subseg_set (absolute_section, 0);
2946 mri_comment_end (stop, stopc);
2947 demand_empty_rest_of_line ();
2956 temp = get_absolute_expression ();
2957 subseg_set (text_section, (subsegT) temp);
2958 demand_empty_rest_of_line ();
2960 const_flag &= ~IN_DEFAULT_SECTION;
2966 demand_empty_rest_of_line ()
2969 if (is_end_of_line[(unsigned char) *input_line_pointer])
2971 input_line_pointer++;
2975 ignore_rest_of_line ();
2977 /* Return having already swallowed end-of-line. */
2978 } /* Return pointing just after end-of-line. */
2981 ignore_rest_of_line () /* For suspect lines: gives warning. */
2983 if (!is_end_of_line[(unsigned char) *input_line_pointer])
2985 if (isprint (*input_line_pointer))
2986 as_bad ("Rest of line ignored. First ignored character is `%c'.",
2987 *input_line_pointer);
2989 as_bad ("Rest of line ignored. First ignored character valued 0x%x.",
2990 *input_line_pointer);
2991 while (input_line_pointer < buffer_limit
2992 && !is_end_of_line[(unsigned char) *input_line_pointer])
2994 input_line_pointer++;
2997 input_line_pointer++; /* Return pointing just after end-of-line. */
2998 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
3004 * In: Pointer to a symbol.
3005 * Input_line_pointer->expression.
3007 * Out: Input_line_pointer->just after any whitespace after expression.
3008 * Tried to set symbol to value of expression.
3009 * Will change symbols type, value, and frag;
3012 pseudo_set (symbolP)
3016 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3018 #endif /* OBJ_AOUT or OBJ_BOUT */
3020 know (symbolP); /* NULL pointer is logic error. */
3021 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3022 ext = S_IS_EXTERNAL (symbolP);
3023 #endif /* OBJ_AOUT or OBJ_BOUT */
3025 (void) expression (&exp);
3027 if (exp.X_op == O_illegal)
3028 as_bad ("illegal expression; zero assumed");
3029 else if (exp.X_op == O_absent)
3030 as_bad ("missing expression; zero assumed");
3031 else if (exp.X_op == O_big)
3032 as_bad ("%s number invalid; zero assumed",
3033 exp.X_add_number > 0 ? "bignum" : "floating point");
3034 else if (exp.X_op == O_subtract
3035 && (S_GET_SEGMENT (exp.X_add_symbol)
3036 == S_GET_SEGMENT (exp.X_op_symbol))
3037 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
3038 && exp.X_add_symbol->sy_frag == exp.X_op_symbol->sy_frag)
3040 exp.X_op = O_constant;
3041 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
3042 - S_GET_VALUE (exp.X_op_symbol));
3050 exp.X_add_number = 0;
3053 S_SET_SEGMENT (symbolP, absolute_section);
3054 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3056 S_SET_EXTERNAL (symbolP);
3058 S_CLEAR_EXTERNAL (symbolP);
3059 #endif /* OBJ_AOUT or OBJ_BOUT */
3060 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3061 symbolP->sy_frag = &zero_address_frag;
3065 S_SET_SEGMENT (symbolP, reg_section);
3066 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
3067 symbolP->sy_frag = &zero_address_frag;
3071 if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section
3072 || exp.X_add_number != 0)
3073 symbolP->sy_value = exp;
3076 symbolS *s = exp.X_add_symbol;
3078 S_SET_SEGMENT (symbolP, S_GET_SEGMENT (s));
3079 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
3081 S_SET_EXTERNAL (symbolP);
3083 S_CLEAR_EXTERNAL (symbolP);
3084 #endif /* OBJ_AOUT or OBJ_BOUT */
3085 S_SET_VALUE (symbolP,
3086 exp.X_add_number + S_GET_VALUE (s));
3087 symbolP->sy_frag = s->sy_frag;
3088 copy_symbol_attributes (symbolP, s);
3093 /* The value is some complex expression.
3094 FIXME: Should we set the segment to anything? */
3095 symbolP->sy_value = exp;
3103 * CONStruct more frag of .bytes, or .words etc.
3104 * Should need_pass_2 be 1 then emit no frag(s).
3105 * This understands EXPRESSIONS.
3109 * This has a split personality. We use expression() to read the
3110 * value. We can detect if the value won't fit in a byte or word.
3111 * But we can't detect if expression() discarded significant digits
3112 * in the case of a long. Not worth the crocks required to fix it.
3115 /* Select a parser for cons expressions. */
3117 /* Some targets need to parse the expression in various fancy ways.
3118 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3119 (for example, the HPPA does this). Otherwise, you can define
3120 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3121 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3122 are defined, which is the normal case, then only simple expressions
3126 parse_mri_cons PARAMS ((expressionS *exp, unsigned int nbytes));
3128 #ifndef TC_PARSE_CONS_EXPRESSION
3129 #ifdef BITFIELD_CONS_EXPRESSIONS
3130 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3132 parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes));
3134 #ifdef REPEAT_CONS_EXPRESSIONS
3135 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3137 parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes));
3140 /* If we haven't gotten one yet, just call expression. */
3141 #ifndef TC_PARSE_CONS_EXPRESSION
3142 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3146 /* worker to do .byte etc statements */
3147 /* clobbers input_line_pointer, checks */
3150 cons_worker (nbytes, rva)
3151 register int nbytes; /* 1=.byte, 2=.word, 4=.long */
3159 #ifdef md_flush_pending_output
3160 md_flush_pending_output ();
3164 stop = mri_comment_field (&stopc);
3166 if (is_it_end_of_statement ())
3169 mri_comment_end (stop, stopc);
3170 demand_empty_rest_of_line ();
3174 #ifdef md_cons_align
3175 md_cons_align (nbytes);
3182 parse_mri_cons (&exp, (unsigned int) nbytes);
3184 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3188 if (exp.X_op == O_symbol)
3189 exp.X_op = O_symbol_rva;
3191 as_fatal ("rva without symbol");
3193 emit_expr (&exp, (unsigned int) nbytes);
3196 while (*input_line_pointer++ == ',');
3198 /* In MRI mode, after an odd number of bytes, we must align to an
3199 even word boundary, unless the next instruction is a dc.b, ds.b
3201 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3202 mri_pending_align = 1;
3204 input_line_pointer--; /* Put terminator back into stream. */
3207 mri_comment_end (stop, stopc);
3209 demand_empty_rest_of_line ();
3217 cons_worker (size, 0);
3224 cons_worker (size, 1);
3228 /* Put the contents of expression EXP into the object file using
3229 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3232 emit_expr (exp, nbytes)
3234 unsigned int nbytes;
3238 valueT extra_digit = 0;
3240 /* Don't do anything if we are going to make another pass. */
3246 /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
3247 appear as a four byte positive constant in the .line section,
3248 followed by a 2 byte 0xffff. Look for that case here. */
3250 static int dwarf_line = -1;
3252 if (strcmp (segment_name (now_seg), ".line") != 0)
3254 else if (dwarf_line >= 0
3256 && exp->X_op == O_constant
3257 && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
3258 listing_source_line ((unsigned int) dwarf_line);
3259 else if (nbytes == 4
3260 && exp->X_op == O_constant
3261 && exp->X_add_number >= 0)
3262 dwarf_line = exp->X_add_number;
3271 /* Allow `.word 0' in the absolute section. */
3272 if (now_seg == absolute_section)
3274 if (op != O_constant || exp->X_add_number != 0)
3275 as_bad ("attempt to store value in absolute section");
3276 abs_section_offset += nbytes;
3280 /* Handle a negative bignum. */
3282 && exp->X_add_number == 0
3283 && exp->X_add_symbol->sy_value.X_op == O_big
3284 && exp->X_add_symbol->sy_value.X_add_number > 0)
3287 unsigned long carry;
3289 exp = &exp->X_add_symbol->sy_value;
3291 /* Negate the bignum: one's complement each digit and add 1. */
3293 for (i = 0; i < exp->X_add_number; i++)
3297 next = (((~ (generic_bignum[i] & LITTLENUM_MASK))
3300 generic_bignum[i] = next & LITTLENUM_MASK;
3301 carry = next >> LITTLENUM_NUMBER_OF_BITS;
3304 /* We can ignore any carry out, because it will be handled by
3305 extra_digit if it is needed. */
3307 extra_digit = (valueT) -1;
3311 if (op == O_absent || op == O_illegal)
3313 as_warn ("zero assumed for missing expression");
3314 exp->X_add_number = 0;
3317 else if (op == O_big && exp->X_add_number <= 0)
3319 as_bad ("floating point number invalid; zero assumed");
3320 exp->X_add_number = 0;
3323 else if (op == O_register)
3325 as_warn ("register value used as expression");
3329 p = frag_more ((int) nbytes);
3331 #ifndef WORKING_DOT_WORD
3332 /* If we have the difference of two symbols in a word, save it on
3333 the broken_words list. See the code in write.c. */
3334 if (op == O_subtract && nbytes == 2)
3336 struct broken_word *x;
3338 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
3339 x->next_broken_word = broken_words;
3342 x->word_goes_here = p;
3344 x->add = exp->X_add_symbol;
3345 x->sub = exp->X_op_symbol;
3346 x->addnum = exp->X_add_number;
3353 /* If we have an integer, but the number of bytes is too large to
3354 pass to md_number_to_chars, handle it as a bignum. */
3355 if (op == O_constant && nbytes > sizeof (valueT))
3360 if (! exp->X_unsigned && exp->X_add_number < 0)
3361 extra_digit = (valueT) -1;
3362 val = (valueT) exp->X_add_number;
3366 generic_bignum[gencnt] = val & LITTLENUM_MASK;
3367 val >>= LITTLENUM_NUMBER_OF_BITS;
3371 op = exp->X_op = O_big;
3372 exp->X_add_number = gencnt;
3375 if (op == O_constant)
3377 register valueT get;
3378 register valueT use;
3379 register valueT mask;
3381 register valueT unmask;
3383 /* JF << of >= number of bits in the object is undefined. In
3384 particular SPARC (Sun 4) has problems */
3385 if (nbytes >= sizeof (valueT))
3388 if (nbytes > sizeof (valueT))
3391 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3395 /* Don't store these bits. */
3396 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
3397 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3400 unmask = ~mask; /* Do store these bits. */
3403 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3404 mask = ~(unmask >> 1); /* Includes sign bit now. */
3407 get = exp->X_add_number;
3409 if ((get & mask) != 0
3410 && ((get & mask) != mask
3411 || (get & hibit) == 0))
3412 { /* Leading bits contain both 0s & 1s. */
3413 as_warn ("Value 0x%lx truncated to 0x%lx.",
3414 (unsigned long) get, (unsigned long) use);
3416 /* put bytes in right order. */
3417 md_number_to_chars (p, use, (int) nbytes);
3419 else if (op == O_big)
3422 LITTLENUM_TYPE *nums;
3424 know (nbytes % CHARS_PER_LITTLENUM == 0);
3426 size = exp->X_add_number * CHARS_PER_LITTLENUM;
3429 as_warn ("Bignum truncated to %d bytes", nbytes);
3433 if (target_big_endian)
3435 while (nbytes > size)
3437 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3438 nbytes -= CHARS_PER_LITTLENUM;
3439 p += CHARS_PER_LITTLENUM;
3442 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
3446 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3447 size -= CHARS_PER_LITTLENUM;
3448 p += CHARS_PER_LITTLENUM;
3453 nums = generic_bignum;
3456 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3458 size -= CHARS_PER_LITTLENUM;
3459 p += CHARS_PER_LITTLENUM;
3460 nbytes -= CHARS_PER_LITTLENUM;
3465 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3466 nbytes -= CHARS_PER_LITTLENUM;
3467 p += CHARS_PER_LITTLENUM;
3473 memset (p, 0, nbytes);
3475 /* Now we need to generate a fixS to record the symbol value.
3476 This is easy for BFD. For other targets it can be more
3477 complex. For very complex cases (currently, the HPPA and
3478 NS32K), you can define TC_CONS_FIX_NEW to do whatever you
3479 want. For simpler cases, you can define TC_CONS_RELOC to be
3480 the name of the reloc code that should be stored in the fixS.
3481 If neither is defined, the code uses NO_RELOC if it is
3482 defined, and otherwise uses 0. */
3484 #ifdef BFD_ASSEMBLER
3485 #ifdef TC_CONS_FIX_NEW
3486 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
3489 bfd_reloc_code_real_type r;
3506 as_bad ("unsupported BFD relocation size %u", nbytes);
3510 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp,
3515 #ifdef TC_CONS_FIX_NEW
3516 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
3518 /* Figure out which reloc number to use. Use TC_CONS_RELOC if
3519 it is defined, otherwise use NO_RELOC if it is defined,
3521 #ifndef TC_CONS_RELOC
3523 #define TC_CONS_RELOC NO_RELOC
3525 #define TC_CONS_RELOC 0
3528 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0,
3530 #endif /* TC_CONS_FIX_NEW */
3531 #endif /* BFD_ASSEMBLER */
3535 #ifdef BITFIELD_CONS_EXPRESSIONS
3537 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3538 w:x,y:z, where w and y are bitwidths and x and y are values. They
3539 then pack them all together. We do a little better in that we allow
3540 them in words, longs, etc. and we'll pack them in target byte order
3543 The rules are: pack least significat bit first, if a field doesn't
3544 entirely fit, put it in the next unit. Overflowing the bitfield is
3545 explicitly *not* even a warning. The bitwidth should be considered
3548 To use this function the tc-XXX.h file should define
3549 BITFIELD_CONS_EXPRESSIONS. */
3552 parse_bitfield_cons (exp, nbytes)
3554 unsigned int nbytes;
3556 unsigned int bits_available = BITS_PER_CHAR * nbytes;
3557 char *hold = input_line_pointer;
3559 (void) expression (exp);
3561 if (*input_line_pointer == ':')
3567 unsigned long width;
3569 if (*input_line_pointer != ':')
3571 input_line_pointer = hold;
3573 } /* next piece is not a bitfield */
3575 /* In the general case, we can't allow
3576 full expressions with symbol
3577 differences and such. The relocation
3578 entries for symbols not defined in this
3579 assembly would require arbitrary field
3580 widths, positions, and masks which most
3581 of our current object formats don't
3584 In the specific case where a symbol
3585 *is* defined in this assembly, we
3586 *could* build fixups and track it, but
3587 this could lead to confusion for the
3588 backends. I'm lazy. I'll take any
3589 SEG_ABSOLUTE. I think that means that
3590 you can use a previous .set or
3591 .equ type symbol. xoxorich. */
3593 if (exp->X_op == O_absent)
3595 as_warn ("using a bit field width of zero");
3596 exp->X_add_number = 0;
3597 exp->X_op = O_constant;
3598 } /* implied zero width bitfield */
3600 if (exp->X_op != O_constant)
3602 *input_line_pointer = '\0';
3603 as_bad ("field width \"%s\" too complex for a bitfield", hold);
3604 *input_line_pointer = ':';
3605 demand_empty_rest_of_line ();
3609 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
3611 as_warn ("field width %lu too big to fit in %d bytes: truncated to %d bits",
3612 width, nbytes, (BITS_PER_CHAR * nbytes));
3613 width = BITS_PER_CHAR * nbytes;
3616 if (width > bits_available)
3618 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
3619 input_line_pointer = hold;
3620 exp->X_add_number = value;
3624 hold = ++input_line_pointer; /* skip ':' */
3626 (void) expression (exp);
3627 if (exp->X_op != O_constant)
3629 char cache = *input_line_pointer;
3631 *input_line_pointer = '\0';
3632 as_bad ("field value \"%s\" too complex for a bitfield", hold);
3633 *input_line_pointer = cache;
3634 demand_empty_rest_of_line ();
3638 value |= ((~(-1 << width) & exp->X_add_number)
3639 << ((BITS_PER_CHAR * nbytes) - bits_available));
3641 if ((bits_available -= width) == 0
3642 || is_it_end_of_statement ()
3643 || *input_line_pointer != ',')
3646 } /* all the bitfields we're gonna get */
3648 hold = ++input_line_pointer;
3649 (void) expression (exp);
3650 } /* forever loop */
3652 exp->X_add_number = value;
3653 exp->X_op = O_constant;
3654 exp->X_unsigned = 1;
3655 } /* if looks like a bitfield */
3656 } /* parse_bitfield_cons() */
3658 #endif /* BITFIELD_CONS_EXPRESSIONS */
3660 /* Handle an MRI style string expression. */
3663 parse_mri_cons (exp, nbytes)
3665 unsigned int nbytes;
3667 if (*input_line_pointer != '\''
3668 && (input_line_pointer[1] != '\''
3669 || (*input_line_pointer != 'A'
3670 && *input_line_pointer != 'E')))
3671 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3675 unsigned int result = 0;
3677 /* An MRI style string. Cut into as many bytes as will fit into
3678 a nbyte chunk, left justify if necessary, and separate with
3679 commas so we can try again later. */
3680 if (*input_line_pointer == 'A')
3681 ++input_line_pointer;
3682 else if (*input_line_pointer == 'E')
3684 as_bad ("EBCDIC constants are not supported");
3685 ++input_line_pointer;
3688 input_line_pointer++;
3689 for (scan = 0; scan < nbytes; scan++)
3691 if (*input_line_pointer == '\'')
3693 if (input_line_pointer[1] == '\'')
3695 input_line_pointer++;
3700 result = (result << 8) | (*input_line_pointer++);
3704 while (scan < nbytes)
3709 /* Create correct expression */
3710 exp->X_op = O_constant;
3711 exp->X_add_number = result;
3712 /* Fake it so that we can read the next char too */
3713 if (input_line_pointer[0] != '\'' ||
3714 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
3716 input_line_pointer -= 2;
3717 input_line_pointer[0] = ',';
3718 input_line_pointer[1] = '\'';
3721 input_line_pointer++;
3725 #ifdef REPEAT_CONS_EXPRESSIONS
3727 /* Parse a repeat expression for cons. This is used by the MIPS
3728 assembler. The format is NUMBER:COUNT; NUMBER appears in the
3729 object file COUNT times.
3731 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
3734 parse_repeat_cons (exp, nbytes)
3736 unsigned int nbytes;
3743 if (*input_line_pointer != ':')
3745 /* No repeat count. */
3749 ++input_line_pointer;
3750 expression (&count);
3751 if (count.X_op != O_constant
3752 || count.X_add_number <= 0)
3754 as_warn ("Unresolvable or nonpositive repeat count; using 1");
3758 /* The cons function is going to output this expression once. So we
3759 output it count - 1 times. */
3760 for (i = count.X_add_number - 1; i > 0; i--)
3761 emit_expr (exp, nbytes);
3764 #endif /* REPEAT_CONS_EXPRESSIONS */
3766 /* Parse a floating point number represented as a hex constant. This
3767 permits users to specify the exact bits they want in the floating
3771 hex_float (float_type, bytes)
3805 as_bad ("Unknown floating type type '%c'", float_type);
3809 /* It would be nice if we could go through expression to parse the
3810 hex constant, but if we get a bignum it's a pain to sort it into
3811 the buffer correctly. */
3813 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
3817 /* The MRI assembler accepts arbitrary underscores strewn about
3818 through the hex constant, so we ignore them as well. */
3819 if (*input_line_pointer == '_')
3821 ++input_line_pointer;
3827 as_warn ("Floating point constant too large");
3830 d = hex_value (*input_line_pointer) << 4;
3831 ++input_line_pointer;
3832 while (*input_line_pointer == '_')
3833 ++input_line_pointer;
3834 if (hex_p (*input_line_pointer))
3836 d += hex_value (*input_line_pointer);
3837 ++input_line_pointer;
3839 if (target_big_endian)
3842 bytes[length - i - 1] = d;
3848 if (target_big_endian)
3849 memset (bytes + i, 0, length - i);
3851 memset (bytes, 0, length - i);
3860 * CONStruct some more frag chars of .floats .ffloats etc.
3861 * Makes 0 or more new frags.
3862 * If need_pass_2 == 1, no frags are emitted.
3863 * This understands only floating literals, not expressions. Sorry.
3865 * A floating constant is defined by atof_generic(), except it is preceded
3866 * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
3867 * reading, I decided to be incompatible. This always tries to give you
3868 * rounded bits to the precision of the pseudo-op. Former AS did premature
3869 * truncatation, restored noisy bits instead of trailing 0s AND gave you
3870 * a choice of 2 flavours of noise according to which of 2 floating-point
3871 * scanners you directed AS to use.
3873 * In: input_line_pointer->whitespace before, or '0' of flonum.
3878 float_cons (float_type)
3879 /* Clobbers input_line-pointer, checks end-of-line. */
3880 register int float_type; /* 'f':.ffloat ... 'F':.float ... */
3883 int length; /* Number of chars in an object. */
3884 register char *err; /* Error from scanning floating literal. */
3885 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3887 if (is_it_end_of_statement ())
3889 demand_empty_rest_of_line ();
3893 #ifdef md_flush_pending_output
3894 md_flush_pending_output ();
3899 /* input_line_pointer->1st char of a flonum (we hope!). */
3902 /* Skip any 0{letter} that may be present. Don't even check if the
3903 * letter is legal. Someone may invent a "z" format and this routine
3904 * has no use for such information. Lusers beware: you get
3905 * diagnostics if your input is ill-conditioned.
3907 if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1]))
3908 input_line_pointer += 2;
3910 /* Accept :xxxx, where the x's are hex digits, for a floating
3911 point with the exact digits specified. */
3912 if (input_line_pointer[0] == ':')
3914 ++input_line_pointer;
3915 length = hex_float (float_type, temp);
3918 ignore_rest_of_line ();
3924 err = md_atof (float_type, temp, &length);
3925 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
3929 as_bad ("Bad floating literal: %s", err);
3930 ignore_rest_of_line ();
3941 #ifdef REPEAT_CONS_EXPRESSIONS
3942 if (*input_line_pointer == ':')
3944 expressionS count_exp;
3946 ++input_line_pointer;
3947 expression (&count_exp);
3948 if (count_exp.X_op != O_constant
3949 || count_exp.X_add_number <= 0)
3951 as_warn ("unresolvable or nonpositive repeat count; using 1");
3954 count = count_exp.X_add_number;
3958 while (--count >= 0)
3960 p = frag_more (length);
3961 memcpy (p, temp, (unsigned int) length);
3966 while (*input_line_pointer++ == ',');
3968 --input_line_pointer; /* Put terminator back into stream. */
3969 demand_empty_rest_of_line ();
3970 } /* float_cons() */
3972 /* Return the size of a LEB128 value */
3975 sizeof_sleb128 (value)
3978 register int size = 0;
3979 register unsigned byte;
3983 byte = (value & 0x7f);
3984 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
3985 Fortunately, we can structure things so that the extra work reduces
3986 to a noop on systems that do things "properly". */
3987 value = (value >> 7) | ~(-(offsetT)1 >> 7);
3990 while (!(((value == 0) && ((byte & 0x40) == 0))
3991 || ((value == -1) && ((byte & 0x40) != 0))));
3997 sizeof_uleb128 (value)
4000 register int size = 0;
4001 register unsigned byte;
4005 byte = (value & 0x7f);
4015 sizeof_leb128 (value, sign)
4020 return sizeof_sleb128 ((offsetT) value);
4022 return sizeof_uleb128 (value);
4025 /* Output a LEB128 value. */
4028 output_sleb128 (p, value)
4032 register char *orig = p;
4037 unsigned byte = (value & 0x7f);
4039 /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
4040 Fortunately, we can structure things so that the extra work reduces
4041 to a noop on systems that do things "properly". */
4042 value = (value >> 7) | ~(-(offsetT)1 >> 7);
4044 more = !((((value == 0) && ((byte & 0x40) == 0))
4045 || ((value == -1) && ((byte & 0x40) != 0))));
4057 output_uleb128 (p, value)
4065 unsigned byte = (value & 0x7f);
4068 /* More bytes to follow. */
4079 output_leb128 (p, value, sign)
4085 return output_sleb128 (p, (offsetT) value);
4087 return output_uleb128 (p, value);
4090 /* Do the same for bignums. We combine sizeof with output here in that
4091 we don't output for NULL values of P. It isn't really as critical as
4092 for "normal" values that this be streamlined. */
4095 output_big_sleb128 (p, bignum, size)
4097 LITTLENUM_TYPE *bignum;
4105 /* Strip leading sign extensions off the bignum. */
4106 while (size > 0 && bignum[size-1] == (LITTLENUM_TYPE)-1)
4111 if (loaded < 7 && size > 0)
4113 val |= (*bignum << loaded);
4114 loaded += 8 * CHARS_PER_LITTLENUM;
4125 if ((val == 0 && (byte & 0x40) == 0)
4126 || (~(val | ~(((valueT)1 << loaded) - 1)) == 0
4127 && (byte & 0x40) != 0))
4135 while (byte & 0x80);
4141 output_big_uleb128 (p, bignum, size)
4143 LITTLENUM_TYPE *bignum;
4151 /* Strip leading zeros off the bignum. */
4152 /* XXX: Is this needed? */
4153 while (size > 0 && bignum[size-1] == 0)
4158 if (loaded < 7 && size > 0)
4160 val |= (*bignum << loaded);
4161 loaded += 8 * CHARS_PER_LITTLENUM;
4170 if (size > 0 || val)
4177 while (byte & 0x80);
4183 output_big_leb128 (p, bignum, size, sign)
4185 LITTLENUM_TYPE *bignum;
4189 return output_big_sleb128 (p, bignum, size);
4191 return output_big_uleb128 (p, bignum, size);
4194 /* Generate the appropriate fragments for a given expression to emit a
4198 emit_leb128_expr(exp, sign)
4202 operatorT op = exp->X_op;
4204 if (op == O_absent || op == O_illegal)
4206 as_warn ("zero assumed for missing expression");
4207 exp->X_add_number = 0;
4210 else if (op == O_big && exp->X_add_number <= 0)
4212 as_bad ("floating point number invalid; zero assumed");
4213 exp->X_add_number = 0;
4216 else if (op == O_register)
4218 as_warn ("register value used as expression");
4222 if (op == O_constant)
4224 /* If we've got a constant, emit the thing directly right now. */
4226 valueT value = exp->X_add_number;
4230 size = sizeof_leb128 (value, sign);
4231 p = frag_more (size);
4232 output_leb128 (p, value, sign);
4234 else if (op == O_big)
4236 /* O_big is a different sort of constant. */
4241 size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign);
4242 p = frag_more (size);
4243 output_big_leb128 (p, generic_bignum, exp->X_add_number, sign);
4247 /* Otherwise, we have to create a variable sized fragment and
4248 resolve things later. */
4250 frag_var (rs_leb128, sizeof_uleb128 (~(valueT)0), 0, sign,
4251 make_expr_symbol (exp), 0, (char *) NULL);
4255 /* Parse the .sleb128 and .uleb128 pseudos. */
4265 emit_leb128_expr (&exp, sign);
4266 } while (*input_line_pointer++ == ',');
4268 input_line_pointer--;
4269 demand_empty_rest_of_line ();
4275 * We read 0 or more ',' seperated, double-quoted strings.
4277 * Caller should have checked need_pass_2 is FALSE because we don't check it.
4282 stringer (append_zero) /* Worker to do .ascii etc statements. */
4283 /* Checks end-of-line. */
4284 register int append_zero; /* 0: don't append '\0', else 1 */
4286 register unsigned int c;
4289 #ifdef md_flush_pending_output
4290 md_flush_pending_output ();
4294 * The following awkward logic is to parse ZERO or more strings,
4295 * comma seperated. Recall a string expression includes spaces
4296 * before the opening '\"' and spaces after the closing '\"'.
4297 * We fake a leading ',' if there is (supposed to be)
4298 * a 1st, expression. We keep demanding expressions for each
4301 if (is_it_end_of_statement ())
4303 c = 0; /* Skip loop. */
4304 ++input_line_pointer; /* Compensate for end of loop. */
4308 c = ','; /* Do loop. */
4310 while (c == ',' || c == '<' || c == '"')
4313 switch (*input_line_pointer)
4316 ++input_line_pointer; /*->1st char of string. */
4317 start = input_line_pointer;
4318 while (is_a_char (c = next_char_of_string ()))
4320 FRAG_APPEND_1_CHAR (c);
4324 FRAG_APPEND_1_CHAR (0);
4326 know (input_line_pointer[-1] == '\"');
4330 /* In ELF, when gcc is emitting DWARF 1 debugging output, it
4331 will emit .string with a filename in the .debug_sfnames
4332 section to indicate a file name. I don't know if this
4333 will work for compilers other than gcc, and I don't know
4334 if it will work for DWARF 2. */
4335 if (strcmp (segment_name (now_seg), ".debug_sfnames") == 0)
4337 c = input_line_pointer[-1];
4338 input_line_pointer[-1] = '\0';
4339 listing_source_file (start);
4340 input_line_pointer[-1] = c;
4347 input_line_pointer++;
4348 c = get_single_number ();
4349 FRAG_APPEND_1_CHAR (c);
4350 if (*input_line_pointer != '>')
4352 as_bad ("Expected <nn>");
4354 input_line_pointer++;
4357 input_line_pointer++;
4361 c = *input_line_pointer;
4364 demand_empty_rest_of_line ();
4367 /* FIXME-SOMEDAY: I had trouble here on characters with the
4368 high bits set. We'll probably also have trouble with
4369 multibyte chars, wide chars, etc. Also be careful about
4370 returning values bigger than 1 byte. xoxorich. */
4373 next_char_of_string ()
4375 register unsigned int c;
4377 c = *input_line_pointer++ & CHAR_MASK;
4385 as_warn ("Unterminated string: Newline inserted.");
4386 bump_line_counters ();
4389 #ifndef NO_STRING_ESCAPES
4391 switch (c = *input_line_pointer++)
4419 break; /* As itself. */
4435 for (i = 0, number = 0; isdigit (c) && i < 3; c = *input_line_pointer++, i++)
4437 number = number * 8 + c - '0';
4441 --input_line_pointer;
4450 c = *input_line_pointer++;
4451 while (isxdigit (c))
4454 number = number * 16 + c - '0';
4455 else if (isupper (c))
4456 number = number * 16 + c - 'A' + 10;
4458 number = number * 16 + c - 'a' + 10;
4459 c = *input_line_pointer++;
4462 --input_line_pointer;
4467 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
4468 as_warn ("Unterminated string: Newline inserted.");
4470 bump_line_counters ();
4475 #ifdef ONLY_STANDARD_ESCAPES
4476 as_bad ("Bad escaped character in string, '?' assumed");
4478 #endif /* ONLY_STANDARD_ESCAPES */
4481 } /* switch on escaped char */
4483 #endif /* ! defined (NO_STRING_ESCAPES) */
4487 } /* switch on char */
4489 } /* next_char_of_string() */
4492 get_segmented_expression (expP)
4493 register expressionS *expP;
4495 register segT retval;
4497 retval = expression (expP);
4498 if (expP->X_op == O_illegal
4499 || expP->X_op == O_absent
4500 || expP->X_op == O_big)
4502 as_bad ("expected address expression; zero assumed");
4503 expP->X_op = O_constant;
4504 expP->X_add_number = 0;
4505 retval = absolute_section;
4511 get_known_segmented_expression (expP)
4512 register expressionS *expP;
4514 register segT retval;
4516 if ((retval = get_segmented_expression (expP)) == undefined_section)
4518 /* There is no easy way to extract the undefined symbol from the
4520 if (expP->X_add_symbol != NULL
4521 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
4522 as_warn ("symbol \"%s\" undefined; zero assumed",
4523 S_GET_NAME (expP->X_add_symbol));
4525 as_warn ("some symbol undefined; zero assumed");
4526 retval = absolute_section;
4527 expP->X_op = O_constant;
4528 expP->X_add_number = 0;
4530 know (retval == absolute_section || SEG_NORMAL (retval));
4532 } /* get_known_segmented_expression() */
4535 get_absolute_expression ()
4540 if (exp.X_op != O_constant)
4542 if (exp.X_op != O_absent)
4543 as_bad ("bad or irreducible absolute expression; zero assumed");
4544 exp.X_add_number = 0;
4546 return exp.X_add_number;
4549 char /* return terminator */
4550 get_absolute_expression_and_terminator (val_pointer)
4551 long *val_pointer; /* return value of expression */
4553 /* FIXME: val_pointer should probably be offsetT *. */
4554 *val_pointer = (long) get_absolute_expression ();
4555 return (*input_line_pointer++);
4559 * demand_copy_C_string()
4561 * Like demand_copy_string, but return NULL if the string contains any '\0's.
4562 * Give a warning if that happens.
4565 demand_copy_C_string (len_pointer)
4570 if ((s = demand_copy_string (len_pointer)) != 0)
4574 for (len = *len_pointer; len > 0; len--)
4581 as_bad ("This string may not contain \'\\0\'");
4589 * demand_copy_string()
4591 * Demand string, but return a safe (=private) copy of the string.
4592 * Return NULL if we can't read a string here.
4595 demand_copy_string (lenP)
4598 register unsigned int c;
4604 if (*input_line_pointer == '\"')
4606 input_line_pointer++; /* Skip opening quote. */
4608 while (is_a_char (c = next_char_of_string ()))
4610 obstack_1grow (¬es, c);
4613 /* JF this next line is so demand_copy_C_string will return a
4614 null terminated string. */
4615 obstack_1grow (¬es, '\0');
4616 retval = obstack_finish (¬es);
4620 as_warn ("Missing string");
4622 ignore_rest_of_line ();
4626 } /* demand_copy_string() */
4629 * is_it_end_of_statement()
4631 * In: Input_line_pointer->next character.
4633 * Do: Skip input_line_pointer over all whitespace.
4635 * Out: 1 if input_line_pointer->end-of-line.
4638 is_it_end_of_statement ()
4641 return (is_end_of_line[(unsigned char) *input_line_pointer]);
4642 } /* is_it_end_of_statement() */
4645 equals (sym_name, reassign)
4649 register symbolS *symbolP; /* symbol we are working with */
4653 input_line_pointer++;
4654 if (*input_line_pointer == '=')
4655 input_line_pointer++;
4657 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
4658 input_line_pointer++;
4661 stop = mri_comment_field (&stopc);
4663 if (sym_name[0] == '.' && sym_name[1] == '\0')
4665 /* Turn '. = mumble' into a .org mumble */
4666 register segT segment;
4669 segment = get_known_segmented_expression (&exp);
4671 do_org (segment, &exp, 0);
4675 symbolP = symbol_find_or_make (sym_name);
4676 /* Permit register names to be redefined. */
4678 && S_IS_DEFINED (symbolP)
4679 && S_GET_SEGMENT (symbolP) != reg_section)
4680 as_bad ("symbol `%s' already defined", S_GET_NAME (symbolP));
4681 pseudo_set (symbolP);
4685 mri_comment_end (stop, stopc);
4688 /* .include -- include a file at this point. */
4701 if (! flag_m68k_mri)
4702 filename = demand_copy_string (&i);
4707 while (! is_end_of_line[(unsigned char) *input_line_pointer]
4708 && *input_line_pointer != ' '
4709 && *input_line_pointer != '\t')
4711 obstack_1grow (¬es, *input_line_pointer);
4712 ++input_line_pointer;
4715 obstack_1grow (¬es, '\0');
4716 filename = obstack_finish (¬es);
4717 while (! is_end_of_line[(unsigned char) *input_line_pointer])
4718 ++input_line_pointer;
4720 demand_empty_rest_of_line ();
4721 path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ );
4722 for (i = 0; i < include_dir_count; i++)
4724 strcpy (path, include_dirs[i]);
4726 strcat (path, filename);
4727 if (0 != (try = fopen (path, "r")))
4736 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
4737 register_dependency (path);
4738 newbuf = input_scrub_include_file (path, input_line_pointer);
4739 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
4743 add_include_dir (path)
4748 if (include_dir_count == 0)
4750 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
4751 include_dirs[0] = "."; /* Current dir */
4752 include_dir_count = 2;
4756 include_dir_count++;
4757 include_dirs = (char **) realloc (include_dirs,
4758 include_dir_count * sizeof (*include_dirs));
4761 include_dirs[include_dir_count - 1] = path; /* New one */
4764 if (i > include_dir_maxlen)
4765 include_dir_maxlen = i;
4766 } /* add_include_dir() */
4772 while (!is_end_of_line[(unsigned char) *input_line_pointer])
4774 ++input_line_pointer;
4776 ++input_line_pointer;
4781 read_print_statistics (file)
4784 hash_print_statistics (file, "pseudo-op table", po_hash);