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 int generate_asm_lineno = 0; /* flag to generate line stab for .s file */
68 #if BITS_PER_CHAR != 8
69 /* The following table is indexed by[(char)] and will break if
70 a char does not have exactly 256 states (hopefully 0:255!)! */
75 /* The m88k unfortunately uses @ as a label beginner. */
80 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
85 /* The Delta 68k assembler permits % inside label names. */
90 /* The PowerPC Windows NT assemblers permits ? inside label names. */
95 /* The a29k assembler does not permits labels to start with $. */
100 /* The Delta 68k assembler permits ~ at start of label names. */
104 /* used by is_... macros. our ctype[] */
107 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
108 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
109 0, 0, 0, 0, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
110 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
111 LEX_AT, 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, 0, 3, /* PQRSTUVWXYZ[\]^_ */
113 0, 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, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */
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,
120 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
121 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
127 * Out: 1 if this character ends a line.
130 char is_end_of_line[256] =
133 _, _, _, _, _, _, _, _, _, _, 99, _, _, 99, _, _, /* @abcdefghijklmno */
135 _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, _, /* @abcdefghijklmno */
137 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
139 _,99, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* _!"#$%&'()*+,-./ */
140 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0123456789:;<=>? */
142 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
143 _, _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, /* 0123456789:;<=>? */
145 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
146 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
147 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
148 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
149 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
150 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
151 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
152 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
153 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
157 /* Functions private to this file. */
159 static char *buffer; /* 1st char of each buffer of lines is here. */
160 static char *buffer_limit; /*->1 + last char in buffer. */
162 /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1 in the
163 tc-<CPU>.h file. See the "Porting GAS" section of the internals manual. */
164 int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
166 static char *old_buffer; /* JF a hack */
167 static char *old_input;
168 static char *old_limit;
170 /* Variables for handling include file directory list. */
172 char **include_dirs; /* List of pointers to directories to
173 search for .include's */
174 int include_dir_count; /* How many are in the list */
175 int include_dir_maxlen = 1;/* Length of longest in list */
177 #ifndef WORKING_DOT_WORD
178 struct broken_word *broken_words;
179 int new_broken_words;
182 /* The current offset into the absolute section. We don't try to
183 build frags in the absolute section, since no data can be stored
184 there. We just keep track of the current offset. */
185 addressT abs_section_offset;
187 /* If this line had an MRI style label, it is stored in this variable.
188 This is used by some of the MRI pseudo-ops. */
191 /* This global variable is used to support MRI common sections. We
192 translate such sections into a common symbol. This variable is
193 non-NULL when we are in an MRI common section. */
194 symbolS *mri_common_symbol;
196 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
197 need to align to an even byte boundary unless the next pseudo-op is
198 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
200 static int mri_pending_align;
202 static int scrub_from_string PARAMS ((char **));
203 static void do_align PARAMS ((int, char *, int, int));
204 static void s_align PARAMS ((int, int));
205 static int hex_float PARAMS ((int, char *));
206 static void do_org PARAMS ((segT, expressionS *, int));
207 char *demand_copy_string PARAMS ((int *lenP));
208 static segT get_segmented_expression PARAMS ((expressionS *expP));
209 static segT get_known_segmented_expression PARAMS ((expressionS * expP));
210 static void pobegin PARAMS ((void));
211 static int get_line_sb PARAMS ((sb *));
220 obj_read_begin_hook ();
222 /* Something close -- but not too close -- to a multiple of 1024.
223 The debugging malloc I'm using has 24 bytes of overhead. */
224 obstack_begin (¬es, chunksize);
225 obstack_begin (&cond_obstack, chunksize);
227 /* Use machine dependent syntax */
228 for (p = line_separator_chars; *p; p++)
229 is_end_of_line[(unsigned char) *p] = 1;
230 /* Use more. FIXME-SOMEDAY. */
236 /* set up pseudo-op tables */
238 static struct hash_control *po_hash;
240 static const pseudo_typeS potable[] =
242 {"abort", s_abort, 0},
243 {"align", s_align_ptwo, 0},
244 {"ascii", stringer, 0},
245 {"asciz", stringer, 1},
246 {"balign", s_align_bytes, 0},
247 {"balignw", s_align_bytes, -2},
248 {"balignl", s_align_bytes, -4},
252 {"common", s_mri_common, 0},
253 {"common.s", s_mri_common, 1},
257 {"dc.d", float_cons, 'd'},
259 {"dc.s", float_cons, 'f'},
261 {"dc.x", float_cons, 'x'},
263 {"dcb.b", s_space, 1},
264 {"dcb.d", s_float_space, 'd'},
265 {"dcb.l", s_space, 4},
266 {"dcb.s", s_float_space, 'f'},
267 {"dcb.w", s_space, 2},
268 {"dcb.x", s_float_space, 'x'},
270 {"ds.b", s_space, 1},
271 {"ds.d", s_space, 8},
272 {"ds.l", s_space, 4},
273 {"ds.p", s_space, 12},
274 {"ds.s", s_space, 4},
275 {"ds.w", s_space, 2},
276 {"ds.x", s_space, 12},
277 {"debug", s_ignore, 0},
282 {"double", float_cons, 'd'},
284 {"eject", listing_eject, 0}, /* Formfeed listing */
286 {"elsec", s_else, 0},
288 {"endc", s_endif, 0},
289 {"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 {"spc", s_ignore, 0},
366 {"stabd", s_stab, 'd'},
367 {"stabn", s_stab, 'n'},
368 {"stabs", s_stab, 's'},
369 {"string", stringer, 1},
370 {"struct", s_struct, 0},
374 /* This is for gcc to use. It's only just been added (2/94), so gcc
375 won't be able to use it for a while -- probably a year or more.
376 But once this has been released, check with gcc maintainers
377 before deleting it or even changing the spelling. */
378 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
379 /* If we're folding case -- done for some targets, not necessarily
380 all -- the above string in an input file will be converted to
381 this one. Match it either way... */
382 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
384 {"title", listing_title, 0}, /* Listing title */
385 {"ttl", listing_title, 0},
390 {"xdef", s_globl, 0},
391 {"xref", s_ignore, 0},
392 {"xstabs", s_xstab, 's'},
394 {"zero", s_space, 0},
395 {NULL} /* end sentinel */
398 static int pop_override_ok = 0;
399 static const char *pop_table_name;
403 const pseudo_typeS *table;
406 const pseudo_typeS *pop;
407 for (pop = table; pop->poc_name; pop++)
409 errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
410 if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
411 as_fatal ("error constructing %s pseudo-op table: %s", pop_table_name,
416 #ifndef md_pop_insert
417 #define md_pop_insert() pop_insert(md_pseudo_table)
420 #ifndef obj_pop_insert
421 #define obj_pop_insert() pop_insert(obj_pseudo_table)
427 po_hash = hash_new ();
429 /* Do the target-specific pseudo ops. */
430 pop_table_name = "md";
433 /* Now object specific. Skip any that were in the target table. */
434 pop_table_name = "obj";
438 /* Now portable ones. Skip any that we've seen already. */
439 pop_table_name = "standard";
440 pop_insert (potable);
443 #define HANDLE_CONDITIONAL_ASSEMBLY() \
444 if (ignore_input ()) \
446 while (! is_end_of_line[(unsigned char) *input_line_pointer++]) \
447 if (input_line_pointer == buffer_limit) \
453 /* This function is used when scrubbing the characters between #APP
456 static char *scrub_string;
457 static char *scrub_string_end;
460 scrub_from_string (from)
465 *from = scrub_string;
466 size = scrub_string_end - scrub_string;
467 scrub_string = scrub_string_end;
471 /* read_a_source_file()
473 * We read the file, putting things into a web that
474 * represents what we have been reading.
477 read_a_source_file (name)
481 register char *s; /* string of symbol, '\0' appended */
485 buffer = input_scrub_new_file (name);
488 listing_newline ("");
490 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
491 { /* We have another line to parse. */
492 know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */
493 contin: /* JF this goto is my fault I admit it.
494 Someone brave please re-write the whole
495 input section here? Pleeze??? */
496 while (input_line_pointer < buffer_limit)
498 /* We have more of this buffer to parse. */
501 * We now have input_line_pointer->1st char of next line.
502 * If input_line_pointer [-1] == '\n' then we just
503 * scanned another line: so bump line counters.
505 if (is_end_of_line[(unsigned char) input_line_pointer[-1]])
507 #ifdef md_start_line_hook
508 md_start_line_hook ();
511 if (input_line_pointer[-1] == '\n')
512 bump_line_counters ();
517 #ifdef LABELS_WITHOUT_COLONS
522 /* Text at the start of a line must be a label, we
523 run down and stick a colon in. */
524 if (is_name_beginner (*input_line_pointer))
526 char *line_start = input_line_pointer;
531 HANDLE_CONDITIONAL_ASSEMBLY ();
533 c = get_symbol_end ();
535 /* In MRI mode, the EQU and MACRO pseudoops must
536 be handled specially. */
540 char *rest = input_line_pointer + 1;
544 if (*rest == ' ' || *rest == '\t')
546 if ((strncasecmp (rest, "EQU", 3) == 0
547 || strncasecmp (rest, "SET", 3) == 0)
548 && (rest[3] == ' ' || rest[3] == '\t'))
550 input_line_pointer = rest + 3;
552 strncasecmp (rest, "SET", 3) == 0);
555 if (strncasecmp (rest, "MACRO", 5) == 0
558 || is_end_of_line[(unsigned char) rest[5]]))
562 /* In MRI mode, we need to handle the MACRO
563 pseudo-op specially: we don't want to put the
564 symbol in the symbol table. */
565 if (! mri_line_macro)
566 line_label = colon (line_start);
568 line_label = symbol_create (line_start,
573 *input_line_pointer = c;
575 input_line_pointer++;
581 * We are at the begining of a line, or similar place.
582 * We expect a well-formed assembler statement.
583 * A "symbol-name:" is a statement.
585 * Depending on what compiler is used, the order of these tests
586 * may vary to catch most common case 1st.
587 * Each test is independent of all other tests at the (top) level.
588 * PLEASE make a compiler that doesn't use this assembler.
589 * It is crufty to waste a compiler's time encoding things for this
590 * assembler, which then wastes more time decoding it.
591 * (And communicating via (linear) files is silly!
592 * If you must pass stuff, please pass a tree!)
594 if ((c = *input_line_pointer++) == '\t'
599 c = *input_line_pointer++;
601 know (c != ' '); /* No further leading whitespace. */
604 * C is the 1st significant character.
605 * Input_line_pointer points after that character.
607 if (is_name_beginner (c))
609 /* want user-defined label or pseudo/opcode */
610 HANDLE_CONDITIONAL_ASSEMBLY ();
612 s = --input_line_pointer;
613 c = get_symbol_end (); /* name's delimiter */
615 * C is character after symbol.
616 * That character's place in the input line is now '\0'.
617 * S points to the beginning of the symbol.
618 * [In case of pseudo-op, s->'.'.]
619 * Input_line_pointer->'\0' where c was.
621 if (TC_START_LABEL(c, input_line_pointer))
625 char *rest = input_line_pointer + 1;
627 /* In MRI mode, \tsym: set 0 is permitted. */
631 if (*rest == ' ' || *rest == '\t')
633 if ((strncasecmp (rest, "EQU", 3) == 0
634 || strncasecmp (rest, "SET", 3) == 0)
635 && (rest[3] == ' ' || rest[3] == '\t'))
637 input_line_pointer = rest + 3;
643 line_label = colon (s); /* user-defined label */
644 *input_line_pointer++ = ':'; /* Put ':' back for error messages' sake. */
645 /* Input_line_pointer->after ':'. */
651 || ((c == ' ' || c == '\t')
652 && input_line_pointer[1] == '='
653 #ifdef TC_EQUAL_IN_INSN
654 && ! TC_EQUAL_IN_INSN (c, input_line_pointer)
659 demand_empty_rest_of_line ();
662 { /* expect pseudo-op or machine instruction */
665 #define IGNORE_OPCODE_CASE
666 #ifdef IGNORE_OPCODE_CASE
684 /* The MRI assembler and the m88k use pseudo-ops
686 pop = (pseudo_typeS *) hash_find (po_hash, s);
687 if (pop != NULL && pop->poc_handler == NULL)
692 || (! flag_m68k_mri && *s == '.'))
697 * WARNING: c has next char, which may be end-of-line.
698 * We lookup the pseudo-op table with s+1 because we
699 * already know that the pseudo-op begins with a '.'.
703 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
705 /* In MRI mode, we may need to insert an
706 automatic alignment directive. What a hack
708 if (mri_pending_align
710 || ! ((pop->poc_handler == cons
711 && pop->poc_val == 1)
712 || (pop->poc_handler == s_space
713 && pop->poc_val == 1)
714 #ifdef tc_conditional_pseudoop
715 || tc_conditional_pseudoop (pop)
717 || pop->poc_handler == s_if
718 || pop->poc_handler == s_ifdef
719 || pop->poc_handler == s_ifc
720 || pop->poc_handler == s_ifeqs
721 || pop->poc_handler == s_else
722 || pop->poc_handler == s_endif
723 || pop->poc_handler == s_globl
724 || pop->poc_handler == s_ignore)))
726 do_align (1, (char *) NULL, 0, 0);
727 mri_pending_align = 0;
728 if (line_label != NULL)
730 line_label->sy_frag = frag_now;
731 S_SET_VALUE (line_label, frag_now_fix ());
735 /* Print the error msg now, while we still can */
738 as_bad ("Unknown pseudo-op: `%s'", s);
739 *input_line_pointer = c;
744 /* Put it back for error messages etc. */
745 *input_line_pointer = c;
746 /* The following skip of whitespace is compulsory.
747 A well shaped space is sometimes all that separates
748 keyword from operands. */
749 if (c == ' ' || c == '\t')
750 input_line_pointer++;
752 * Input_line is restored.
753 * Input_line_pointer->1st non-blank char
754 * after pseudo-operation.
756 (*pop->poc_handler) (pop->poc_val);
758 /* If that was .end, just get out now. */
759 if (pop->poc_handler == s_end)
766 /* WARNING: c has char, which may be end-of-line. */
767 /* Also: input_line_pointer->`\0` where c was. */
768 *input_line_pointer = c;
769 while (!is_end_of_line[(unsigned char) *input_line_pointer]
771 #ifdef TC_EOL_IN_INSN
772 || TC_EOL_IN_INSN (input_line_pointer)
776 if (flag_m68k_mri && *input_line_pointer == '\'')
778 input_line_pointer++;
781 c = *input_line_pointer;
782 *input_line_pointer = '\0';
784 #ifdef OBJ_GENERATE_ASM_LINENO
785 if (generate_asm_lineno == 0)
787 if (ecoff_no_current_file ())
788 generate_asm_lineno = 1;
790 if (generate_asm_lineno == 1)
795 as_where (&s, &lineno);
796 OBJ_GENERATE_ASM_LINENO (s, lineno);
805 if (check_macro (s, &out, '\0', &err))
809 *input_line_pointer++ = c;
810 input_scrub_include_sb (&out,
814 input_scrub_next_buffer (&input_line_pointer);
819 if (mri_pending_align)
821 do_align (1, (char *) NULL, 0, 0);
822 mri_pending_align = 0;
823 if (line_label != NULL)
825 line_label->sy_frag = frag_now;
826 S_SET_VALUE (line_label, frag_now_fix ());
830 md_assemble (s); /* Assemble 1 instruction. */
832 *input_line_pointer++ = c;
834 /* We resume loop AFTER the end-of-line from
839 } /* if (is_name_beginner(c) */
842 /* Empty statement? */
843 if (is_end_of_line[(unsigned char) c])
846 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB)
849 /* local label ("4:") */
850 char *backup = input_line_pointer;
852 HANDLE_CONDITIONAL_ASSEMBLY ();
856 while (isdigit (*input_line_pointer))
858 temp = (temp * 10) + *input_line_pointer - '0';
859 ++input_line_pointer;
860 } /* read the whole number */
862 if (LOCAL_LABELS_DOLLAR
863 && *input_line_pointer == '$'
864 && *(input_line_pointer + 1) == ':')
866 input_line_pointer += 2;
868 if (dollar_label_defined (temp))
870 as_fatal ("label \"%d$\" redefined", temp);
873 define_dollar_label (temp);
874 colon (dollar_label_name (temp, 0));
879 && *input_line_pointer++ == ':')
881 fb_label_instance_inc (temp);
882 colon (fb_label_name (temp, 0));
886 input_line_pointer = backup;
887 } /* local label ("4:") */
889 if (c && strchr (line_comment_chars, c))
890 { /* Its a comment. Better say APP or NO_APP */
894 unsigned int new_length;
897 bump_line_counters ();
898 s = input_line_pointer;
899 if (strncmp (s, "APP\n", 4))
900 continue; /* We ignore it */
903 ends = strstr (s, "#NO_APP\n");
907 unsigned int tmp_len;
910 /* The end of the #APP wasn't in this buffer. We
911 keep reading in buffers until we find the #NO_APP
912 that goes with this #APP There is one. The specs
914 tmp_len = buffer_limit - s;
915 tmp_buf = xmalloc (tmp_len + 1);
916 memcpy (tmp_buf, s, tmp_len);
919 new_tmp = input_scrub_next_buffer (&buffer);
923 buffer_limit = new_tmp;
924 input_line_pointer = buffer;
925 ends = strstr (buffer, "#NO_APP\n");
929 num = buffer_limit - buffer;
931 tmp_buf = xrealloc (tmp_buf, tmp_len + num);
932 memcpy (tmp_buf + tmp_len, buffer, num);
937 input_line_pointer = ends ? ends + 8 : NULL;
945 input_line_pointer = ends + 8;
949 scrub_string_end = ends;
951 new_length = ends - s;
952 new_buf = (char *) xmalloc (new_length);
959 space = (new_buf + new_length) - new_tmp;
960 size = do_scrub_chars (scrub_from_string, new_tmp, space);
968 new_buf = xrealloc (new_buf, new_length + 100);
969 new_tmp = new_buf + new_length;
976 old_input = input_line_pointer;
977 old_limit = buffer_limit;
979 input_line_pointer = new_buf;
980 buffer_limit = new_tmp;
984 HANDLE_CONDITIONAL_ASSEMBLY ();
986 #ifdef tc_unrecognized_line
987 if (tc_unrecognized_line (c))
991 /* as_warn("Junk character %d.",c); Now done by ignore_rest */
992 input_line_pointer--; /* Report unknown char as ignored. */
993 ignore_rest_of_line ();
994 } /* while (input_line_pointer<buffer_limit) */
996 #ifdef md_after_pass_hook
997 md_after_pass_hook ();
1003 bump_line_counters ();
1006 buffer = old_buffer;
1007 input_line_pointer = old_input;
1008 buffer_limit = old_limit;
1013 } /* while (more buffers to scan) */
1020 input_scrub_close (); /* Close the input file */
1023 /* For most MRI pseudo-ops, the line actually ends at the first
1024 nonquoted space. This function looks for that point, stuffs a null
1025 in, and sets *STOPCP to the character that used to be there, and
1026 returns the location.
1028 Until I hear otherwise, I am going to assume that this is only true
1029 for the m68k MRI assembler. */
1032 mri_comment_field (stopcp)
1040 know (flag_m68k_mri);
1042 for (s = input_line_pointer;
1043 ((! is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
1048 inquote = ! inquote;
1058 for (s = input_line_pointer; ! is_end_of_line[(unsigned char) *s]; s++)
1068 /* Skip to the end of an MRI comment field. */
1071 mri_comment_end (stop, stopc)
1077 input_line_pointer = stop;
1079 while (! is_end_of_line[(unsigned char) *input_line_pointer])
1080 ++input_line_pointer;
1087 as_fatal (".abort detected. Abandoning ship.");
1090 /* Guts of .align directive. N is the power of two to which to align.
1091 FILL may be NULL, or it may point to the bytes of the fill pattern.
1092 LEN is the length of whatever FILL points to, if anything. MAX is
1093 the maximum number of characters to skip when doing the alignment,
1094 or 0 if there is no maximum. */
1097 do_align (n, fill, len, max)
1106 md_do_align (n, fill, len, max, just_record_alignment);
1111 /* FIXME: Fix this right for BFD! */
1112 if (now_seg != data_section && now_seg != bss_section)
1113 default_fill = NOP_OPCODE;
1116 fill = &default_fill;
1120 /* Only make a frag if we HAVE to. . . */
1121 if (n != 0 && !need_pass_2)
1124 frag_align (n, *fill, max);
1126 frag_align_pattern (n, fill, len, max);
1130 just_record_alignment:
1133 record_alignment (now_seg, n);
1136 /* Handle the .align pseudo-op. A positive ARG is a default alignment
1137 (in bytes). A negative ARG is the negative of the length of the
1138 fill pattern. BYTES_P is non-zero if the alignment value should be
1139 interpreted as the byte boundary, rather than the power of 2. */
1142 s_align (arg, bytes_p)
1146 register unsigned int align;
1154 stop = mri_comment_field (&stopc);
1156 if (is_end_of_line[(unsigned char) *input_line_pointer])
1161 align = arg; /* Default value from pseudo-op table */
1165 align = get_absolute_expression ();
1171 /* Convert to a power of 2. */
1176 for (i = 0; (align & 1) == 0; align >>= 1, ++i)
1179 as_bad ("Alignment not a power of 2");
1187 as_bad ("Alignment too large: %u assumed", align);
1190 if (*input_line_pointer != ',')
1197 ++input_line_pointer;
1198 if (*input_line_pointer == ',')
1202 fill = get_absolute_expression ();
1207 if (*input_line_pointer != ',')
1211 ++input_line_pointer;
1212 max = get_absolute_expression ();
1219 as_warn ("expected fill pattern missing");
1220 do_align (align, (char *) NULL, 0, max);
1235 do_align (align, &fill_char, fill_len, max);
1241 if (fill_len > sizeof ab)
1243 md_number_to_chars (ab, fill, fill_len);
1244 do_align (align, ab, fill_len, max);
1249 mri_comment_end (stop, stopc);
1251 demand_empty_rest_of_line ();
1254 /* Handle the .align pseudo-op on machines where ".align 4" means
1255 align to a 4 byte boundary. */
1264 /* Handle the .align pseud-op on machines where ".align 4" means align
1265 to a 2**4 boundary. */
1278 register char *name;
1282 register symbolS *symbolP;
1287 stop = mri_comment_field (&stopc);
1289 name = input_line_pointer;
1290 c = get_symbol_end ();
1291 /* just after name is now '\0' */
1292 p = input_line_pointer;
1295 if (*input_line_pointer != ',')
1297 as_bad ("Expected comma after symbol-name: rest of line ignored.");
1299 mri_comment_end (stop, stopc);
1300 ignore_rest_of_line ();
1303 input_line_pointer++; /* skip ',' */
1304 if ((temp = get_absolute_expression ()) < 0)
1306 as_warn (".COMMon length (%ld.) <0! Ignored.", (long) temp);
1308 mri_comment_end (stop, stopc);
1309 ignore_rest_of_line ();
1313 symbolP = symbol_find_or_make (name);
1315 if (S_IS_DEFINED (symbolP))
1317 as_bad ("Ignoring attempt to re-define symbol `%s'.",
1318 S_GET_NAME (symbolP));
1320 mri_comment_end (stop, stopc);
1321 ignore_rest_of_line ();
1324 if (S_GET_VALUE (symbolP))
1326 if (S_GET_VALUE (symbolP) != (valueT) temp)
1327 as_bad ("Length of .comm \"%s\" is already %ld. Not changed to %ld.",
1328 S_GET_NAME (symbolP),
1329 (long) S_GET_VALUE (symbolP),
1334 S_SET_VALUE (symbolP, (valueT) temp);
1335 S_SET_EXTERNAL (symbolP);
1339 extern int flag_one;
1340 if ( (!temp) || !flag_one)
1341 S_GET_OTHER(symbolP) = const_flag;
1343 #endif /* not OBJ_VMS */
1344 know (symbolP->sy_frag == &zero_address_frag);
1347 mri_comment_end (stop, stopc);
1349 demand_empty_rest_of_line ();
1352 /* The MRI COMMON pseudo-op. We handle this by creating a common
1353 symbol with the appropriate name. We make s_space do the right
1354 thing by increasing the size. */
1357 s_mri_common (small)
1374 stop = mri_comment_field (&stopc);
1378 name = input_line_pointer;
1379 if (! isdigit ((unsigned char) *name))
1380 c = get_symbol_end ();
1385 ++input_line_pointer;
1387 while (isdigit ((unsigned char) *input_line_pointer));
1388 c = *input_line_pointer;
1389 *input_line_pointer = '\0';
1391 if (line_label != NULL)
1393 alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
1394 + (input_line_pointer - name)
1396 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1401 sym = symbol_find_or_make (name);
1402 *input_line_pointer = c;
1406 if (*input_line_pointer != ',')
1410 ++input_line_pointer;
1411 align = get_absolute_expression ();
1414 if (S_IS_DEFINED (sym))
1416 #if defined (S_IS_COMMON) || defined (BFD_ASSEMBLER)
1417 if (! S_IS_COMMON (sym))
1420 as_bad ("attempt to re-define symbol `%s'", S_GET_NAME (sym));
1421 mri_comment_end (stop, stopc);
1422 ignore_rest_of_line ();
1427 S_SET_EXTERNAL (sym);
1428 mri_common_symbol = sym;
1432 S_SET_ALIGN (sym, align);
1435 if (line_label != NULL)
1437 line_label->sy_value.X_op = O_symbol;
1438 line_label->sy_value.X_add_symbol = sym;
1439 line_label->sy_value.X_add_number = S_GET_VALUE (sym);
1440 line_label->sy_frag = &zero_address_frag;
1441 S_SET_SEGMENT (line_label, expr_section);
1444 /* FIXME: We just ignore the small argument, which distinguishes
1445 COMMON and COMMON.S. I don't know what we can do about it. */
1447 /* Ignore the type and hptype. */
1448 if (*input_line_pointer == ',')
1449 input_line_pointer += 2;
1450 if (*input_line_pointer == ',')
1451 input_line_pointer += 2;
1453 mri_comment_end (stop, stopc);
1455 demand_empty_rest_of_line ();
1465 temp = get_absolute_expression ();
1466 if (flag_readonly_data_in_text)
1468 section = text_section;
1472 section = data_section;
1474 subseg_set (section, (subsegT) temp);
1479 demand_empty_rest_of_line ();
1482 /* Handle the .appfile pseudo-op. This is automatically generated by
1483 do_scrub_chars when a preprocessor # line comment is seen with a
1484 file name. This default definition may be overridden by the object
1485 or CPU specific pseudo-ops. This function is also the default
1486 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1490 s_app_file (appfile)
1496 /* Some assemblers tolerate immediately following '"' */
1497 if ((s = demand_copy_string (&length)) != 0)
1499 /* If this is a fake .appfile, a fake newline was inserted into
1500 the buffer. Passing -2 to new_logical_line tells it to
1502 new_logical_line (s, appfile ? -2 : -1);
1504 /* In MRI mode, the preprocessor may have inserted an extraneous
1507 && *input_line_pointer == '\''
1508 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1509 ++input_line_pointer;
1511 demand_empty_rest_of_line ();
1514 listing_source_file (s);
1522 /* Handle the .appline pseudo-op. This is automatically generated by
1523 do_scrub_chars when a preprocessor # line comment is seen. This
1524 default definition may be overridden by the object or CPU specific
1533 /* The given number is that of the next line. */
1534 l = get_absolute_expression () - 1;
1536 /* Some of the back ends can't deal with non-positive line numbers.
1537 Besides, it's silly. */
1538 as_warn ("Line numbers must be positive; line number %d rejected.", l+1);
1541 new_logical_line ((char *) NULL, l);
1544 listing_source_line (l);
1547 demand_empty_rest_of_line ();
1550 /* Handle the .end pseudo-op. Actually, the real work is done in
1551 read_a_source_file. */
1559 /* The MRI assembler permits the start symbol to follow .end,
1560 but we don't support that. */
1562 if (! is_end_of_line[(unsigned char) *input_line_pointer]
1563 && *input_line_pointer != '*'
1564 && *input_line_pointer != '!')
1565 as_warn ("start address not supported");
1569 /* Handle the .err pseudo-op. */
1575 as_bad (".err encountered");
1576 demand_empty_rest_of_line ();
1579 /* Handle the MRI fail pseudo-op. */
1590 stop = mri_comment_field (&stopc);
1592 temp = get_absolute_expression ();
1594 as_warn (".fail %ld encountered", (long) temp);
1596 as_bad (".fail %ld encountered", (long) temp);
1599 mri_comment_end (stop, stopc);
1601 demand_empty_rest_of_line ();
1608 long temp_repeat = 0;
1610 register long temp_fill = 0;
1613 #ifdef md_flush_pending_output
1614 md_flush_pending_output ();
1617 temp_repeat = get_absolute_expression ();
1618 if (*input_line_pointer == ',')
1620 input_line_pointer++;
1621 temp_size = get_absolute_expression ();
1622 if (*input_line_pointer == ',')
1624 input_line_pointer++;
1625 temp_fill = get_absolute_expression ();
1628 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1629 #define BSD_FILL_SIZE_CROCK_8 (8)
1630 if (temp_size > BSD_FILL_SIZE_CROCK_8)
1632 as_warn (".fill size clamped to %d.", BSD_FILL_SIZE_CROCK_8);
1633 temp_size = BSD_FILL_SIZE_CROCK_8;
1637 as_warn ("Size negative: .fill ignored.");
1640 else if (temp_repeat <= 0)
1642 if (temp_repeat < 0)
1643 as_warn ("Repeat < 0, .fill ignored");
1647 if (temp_size && !need_pass_2)
1649 p = frag_var (rs_fill, (int) temp_size, (int) temp_size, (relax_substateT) 0, (symbolS *) 0, temp_repeat, (char *) 0);
1650 memset (p, 0, (unsigned int) temp_size);
1651 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1652 * flavoured AS. The following bizzare behaviour is to be
1653 * compatible with above. I guess they tried to take up to 8
1654 * bytes from a 4-byte expression and they forgot to sign
1655 * extend. Un*x Sux. */
1656 #define BSD_FILL_SIZE_CROCK_4 (4)
1657 md_number_to_chars (p, (valueT) temp_fill,
1658 (temp_size > BSD_FILL_SIZE_CROCK_4
1659 ? BSD_FILL_SIZE_CROCK_4
1660 : (int) temp_size));
1661 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1662 * but emits no error message because it seems a legal thing to do.
1663 * It is a degenerate case of .fill but could be emitted by a compiler.
1666 demand_empty_rest_of_line ();
1680 stop = mri_comment_field (&stopc);
1684 name = input_line_pointer;
1685 c = get_symbol_end ();
1686 symbolP = symbol_find_or_make (name);
1687 *input_line_pointer = c;
1689 S_SET_EXTERNAL (symbolP);
1692 input_line_pointer++;
1694 if (*input_line_pointer == '\n')
1701 mri_comment_end (stop, stopc);
1703 demand_empty_rest_of_line ();
1706 /* Handle the MRI IRP and IRPC pseudo-ops. */
1718 as_where (&file, &line);
1721 while (! is_end_of_line[(unsigned char) *input_line_pointer])
1722 sb_add_char (&s, *input_line_pointer++);
1726 err = expand_irp (irpc, 0, &s, &out, get_line_sb, '\0');
1728 as_bad_where (file, line, "%s", err);
1732 input_scrub_include_sb (&out, input_line_pointer);
1734 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1737 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
1738 the section to only be linked once. However, this is not supported
1739 by most object file formats. This takes an optional argument,
1740 which is what to do about duplicates. */
1746 enum linkonce_type type;
1750 type = LINKONCE_DISCARD;
1752 if (! is_end_of_line[(unsigned char) *input_line_pointer])
1757 s = input_line_pointer;
1758 c = get_symbol_end ();
1759 if (strcasecmp (s, "discard") == 0)
1760 type = LINKONCE_DISCARD;
1761 else if (strcasecmp (s, "one_only") == 0)
1762 type = LINKONCE_ONE_ONLY;
1763 else if (strcasecmp (s, "same_size") == 0)
1764 type = LINKONCE_SAME_SIZE;
1765 else if (strcasecmp (s, "same_contents") == 0)
1766 type = LINKONCE_SAME_CONTENTS;
1768 as_warn ("unrecognized .linkonce type `%s'", s);
1770 *input_line_pointer = c;
1773 #ifdef obj_handle_link_once
1774 obj_handle_link_once (type);
1775 #else /* ! defined (obj_handle_link_once) */
1776 #ifdef BFD_ASSEMBLER
1780 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
1781 as_warn (".linkonce is not supported for this object file format");
1783 flags = bfd_get_section_flags (stdoutput, now_seg);
1784 flags |= SEC_LINK_ONCE;
1789 case LINKONCE_DISCARD:
1790 flags |= SEC_LINK_DUPLICATES_DISCARD;
1792 case LINKONCE_ONE_ONLY:
1793 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
1795 case LINKONCE_SAME_SIZE:
1796 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
1798 case LINKONCE_SAME_CONTENTS:
1799 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
1802 if (! bfd_set_section_flags (stdoutput, now_seg, flags))
1803 as_bad ("bfd_set_section_flags: %s",
1804 bfd_errmsg (bfd_get_error ()));
1806 #else /* ! defined (BFD_ASSEMBLER) */
1807 as_warn (".linkonce is not supported for this object file format");
1808 #endif /* ! defined (BFD_ASSEMBLER) */
1809 #endif /* ! defined (obj_handle_link_once) */
1811 demand_empty_rest_of_line ();
1815 s_lcomm (needs_align)
1816 /* 1 if this was a ".bss" directive, which may require a 3rd argument
1817 (alignment); 0 if it was an ".lcomm" (2 args only) */
1820 register char *name;
1824 register symbolS *symbolP;
1825 segT current_seg = now_seg;
1826 subsegT current_subseg = now_subseg;
1827 const int max_alignment = 15;
1829 segT bss_seg = bss_section;
1831 name = input_line_pointer;
1832 c = get_symbol_end ();
1833 p = input_line_pointer;
1837 /* Accept an optional comma after the name. The comma used to be
1838 required, but Irix 5 cc does not generate it. */
1839 if (*input_line_pointer == ',')
1841 ++input_line_pointer;
1845 if (*input_line_pointer == '\n')
1847 as_bad ("Missing size expression");
1851 if ((temp = get_absolute_expression ()) < 0)
1853 as_warn ("BSS length (%d.) <0! Ignored.", temp);
1854 ignore_rest_of_line ();
1858 #if defined (TC_MIPS) || defined (TC_ALPHA)
1859 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
1860 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
1862 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
1863 if (temp <= bfd_get_gp_size (stdoutput))
1865 bss_seg = subseg_new (".sbss", 1);
1866 seg_info (bss_seg)->bss = 1;
1867 #ifdef BFD_ASSEMBLER
1868 if (! bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
1869 as_warn ("error setting flags for \".sbss\": %s",
1870 bfd_errmsg (bfd_get_error ()));
1877 /* FIXME. This needs to be machine independent. */
1888 /* FIXME: This needs to be done in a more general fashion. */
1892 record_alignment(bss_seg, align);
1899 if (*input_line_pointer != ',')
1901 as_bad ("Expected comma after size");
1902 ignore_rest_of_line ();
1905 input_line_pointer++;
1907 if (*input_line_pointer == '\n')
1909 as_bad ("Missing alignment");
1912 align = get_absolute_expression ();
1913 if (align > max_alignment)
1915 align = max_alignment;
1916 as_warn ("Alignment too large: %d. assumed.", align);
1921 as_warn ("Alignment negative. 0 assumed.");
1923 record_alignment (bss_seg, align);
1924 } /* if needs align */
1927 /* Assume some objects may require alignment on some systems. */
1928 #if defined (TC_ALPHA) && ! defined (VMS)
1931 align = ffs (temp) - 1;
1932 if (temp % (1 << align))
1939 symbolP = symbol_find_or_make (name);
1943 #if defined(OBJ_AOUT) | defined(OBJ_BOUT)
1944 S_GET_OTHER (symbolP) == 0 &&
1945 S_GET_DESC (symbolP) == 0 &&
1946 #endif /* OBJ_AOUT or OBJ_BOUT */
1947 (S_GET_SEGMENT (symbolP) == bss_seg
1948 || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0)))
1952 subseg_set (bss_seg, 1);
1955 frag_align (align, 0, 0);
1956 /* detach from old frag */
1957 if (S_GET_SEGMENT (symbolP) == bss_seg)
1958 symbolP->sy_frag->fr_symbol = NULL;
1960 symbolP->sy_frag = frag_now;
1961 pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP,
1965 S_SET_SEGMENT (symbolP, bss_seg);
1968 /* The symbol may already have been created with a preceding
1969 ".globl" directive -- be careful not to step on storage class
1970 in that case. Otherwise, set it to static. */
1971 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
1973 S_SET_STORAGE_CLASS (symbolP, C_STAT);
1975 #endif /* OBJ_COFF */
1978 S_SET_SIZE (symbolP, temp);
1982 as_bad ("Ignoring attempt to re-define symbol `%s'.",
1983 S_GET_NAME (symbolP));
1985 subseg_set (current_seg, current_subseg);
1987 demand_empty_rest_of_line ();
1994 register char *name;
1998 register symbolS *symbolP;
2000 /* we permit ANY defined expression: BSD4.2 demands constants */
2001 name = input_line_pointer;
2002 c = get_symbol_end ();
2003 p = input_line_pointer;
2006 if (*input_line_pointer != ',')
2009 as_bad ("Expected comma after name \"%s\"", name);
2011 ignore_rest_of_line ();
2014 input_line_pointer++;
2016 if (exp.X_op != O_constant
2017 && exp.X_op != O_register)
2019 as_bad ("bad expression");
2020 ignore_rest_of_line ();
2024 symbolP = symbol_find_or_make (name);
2026 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
2027 symbolP->sy_desc == 0) out of this test because coff doesn't have
2028 those fields, and I can't see when they'd ever be tripped. I
2029 don't think I understand why they were here so I may have
2030 introduced a bug. As recently as 1.37 didn't have this test
2031 anyway. xoxorich. */
2033 if (S_GET_SEGMENT (symbolP) == undefined_section
2034 && S_GET_VALUE (symbolP) == 0)
2036 /* The name might be an undefined .global symbol; be sure to
2037 keep the "external" bit. */
2038 S_SET_SEGMENT (symbolP,
2039 (exp.X_op == O_constant
2042 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2046 as_bad ("Symbol %s already defined", name);
2049 demand_empty_rest_of_line ();
2052 /* Read a line into an sb. */
2058 char quote1, quote2, inquote;
2060 if (input_line_pointer[-1] == '\n')
2061 bump_line_counters ();
2063 if (input_line_pointer >= buffer_limit)
2065 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2066 if (buffer_limit == 0)
2070 /* If app.c sets any other characters to LEX_IS_STRINGQUOTE, this
2071 code needs to be changed. */
2072 if (! flag_m68k_mri)
2080 #ifdef LEX_IS_STRINGQUOTE
2085 while (! is_end_of_line[(unsigned char) *input_line_pointer]
2086 || (inquote != '\0' && *input_line_pointer != '\n'))
2088 if (inquote == *input_line_pointer)
2090 else if (inquote == '\0')
2092 if (*input_line_pointer == quote1)
2094 else if (*input_line_pointer == quote2)
2097 sb_add_char (line, *input_line_pointer++);
2099 while (input_line_pointer < buffer_limit && *input_line_pointer == '\n')
2101 if (input_line_pointer[-1] == '\n')
2102 bump_line_counters ();
2103 ++input_line_pointer;
2108 /* Define a macro. This is an interface to macro.c, which is shared
2109 between gas and gasp. */
2122 as_where (&file, &line);
2125 while (! is_end_of_line[(unsigned char) *input_line_pointer])
2126 sb_add_char (&s, *input_line_pointer++);
2129 if (line_label != NULL)
2130 sb_add_string (&label, S_GET_NAME (line_label));
2132 err = define_macro (0, &s, &label, get_line_sb, &name);
2134 as_bad_where (file, line, "%s", err);
2137 if (line_label != NULL)
2139 S_SET_SEGMENT (line_label, undefined_section);
2140 S_SET_VALUE (line_label, 0);
2141 line_label->sy_frag = &zero_address_frag;
2145 #ifdef NO_PSEUDO_DOT
2149 && hash_find (po_hash, name) != NULL)
2152 && hash_find (po_hash, name + 1) != NULL))
2153 as_warn ("attempt to redefine pseudo-op `%s' ignored",
2160 /* Handle the .mexit pseudo-op, which immediately exits a macro
2167 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2170 /* Switch in and out of MRI mode. */
2178 on = get_absolute_expression ();
2179 old_flag = flag_mri;
2193 #ifdef MRI_MODE_CHANGE
2195 MRI_MODE_CHANGE (on);
2198 demand_empty_rest_of_line ();
2201 /* Handle changing the location counter. */
2204 do_org (segment, exp, fill)
2209 if (segment != now_seg && segment != absolute_section)
2210 as_bad ("invalid segment \"%s\"; segment \"%s\" assumed",
2211 segment_name (segment), segment_name (now_seg));
2213 if (now_seg == absolute_section)
2216 as_warn ("ignoring fill value in absolute section");
2217 if (exp->X_op != O_constant)
2219 as_bad ("only constant offsets supported in absolute section");
2220 exp->X_add_number = 0;
2222 abs_section_offset = exp->X_add_number;
2228 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp->X_add_symbol,
2229 exp->X_add_number, (char *) NULL);
2238 register segT segment;
2240 register long temp_fill;
2242 /* The m68k MRI assembler has a different meaning for .org. It
2243 means to create an absolute section at a given address. We can't
2244 support that--use a linker script instead. */
2247 as_bad ("MRI style ORG pseudo-op not supported");
2248 ignore_rest_of_line ();
2252 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2253 thing as a sub-segment-relative origin. Any absolute origin is
2254 given a warning, then assumed to be segment-relative. Any
2255 segmented origin expression ("foo+42") had better be in the right
2256 segment or the .org is ignored.
2258 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2259 we never know sub-segment sizes when we are reading code. BSD
2260 will crash trying to emit negative numbers of filler bytes in
2261 certain .orgs. We don't crash, but see as-write for that code.
2263 Don't make frag if need_pass_2==1. */
2264 segment = get_known_segmented_expression (&exp);
2265 if (*input_line_pointer == ',')
2267 input_line_pointer++;
2268 temp_fill = get_absolute_expression ();
2274 do_org (segment, &exp, temp_fill);
2276 demand_empty_rest_of_line ();
2279 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2280 called by the obj-format routine which handles section changing
2281 when in MRI mode. It will create a new section, and return it. It
2282 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2283 'M' (mixed), or 'R' (romable). If BFD_ASSEMBLER is defined, the
2284 flags will be set in the section. */
2298 name = input_line_pointer;
2299 if (! isdigit ((unsigned char) *name))
2300 c = get_symbol_end ();
2305 ++input_line_pointer;
2307 while (isdigit ((unsigned char) *input_line_pointer));
2308 c = *input_line_pointer;
2309 *input_line_pointer = '\0';
2312 name = xstrdup (name);
2314 *input_line_pointer = c;
2316 seg = subseg_new (name, 0);
2318 if (*input_line_pointer == ',')
2322 ++input_line_pointer;
2323 align = get_absolute_expression ();
2324 record_alignment (seg, align);
2328 if (*input_line_pointer == ',')
2330 c = *++input_line_pointer;
2331 c = toupper ((unsigned char) c);
2332 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2335 as_bad ("unrecognized section type");
2336 ++input_line_pointer;
2338 #ifdef BFD_ASSEMBLER
2342 flags = SEC_NO_FLAGS;
2344 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2345 else if (*type == 'D' || *type == 'M')
2346 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2347 else if (*type == 'R')
2348 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2349 if (flags != SEC_NO_FLAGS)
2351 if (! bfd_set_section_flags (stdoutput, seg, flags))
2352 as_warn ("error setting flags for \"%s\": %s",
2353 bfd_section_name (stdoutput, seg),
2354 bfd_errmsg (bfd_get_error ()));
2360 /* Ignore the HP type. */
2361 if (*input_line_pointer == ',')
2362 input_line_pointer += 2;
2364 demand_empty_rest_of_line ();
2366 #else /* ! TC_M68K */
2375 name = input_line_pointer;
2376 c = get_symbol_end ();
2378 name = xstrdup (name);
2380 *input_line_pointer = c;
2382 seg = subseg_new (name, 0);
2384 if (*input_line_pointer != ',')
2390 ++input_line_pointer;
2392 sectype = input_line_pointer;
2393 c = get_symbol_end ();
2394 if (*sectype == '\0')
2396 else if (strcasecmp (sectype, "text") == 0)
2398 else if (strcasecmp (sectype, "data") == 0)
2400 else if (strcasecmp (sectype, "romdata") == 0)
2403 as_warn ("unrecognized section type `%s'", sectype);
2404 *input_line_pointer = c;
2407 if (*input_line_pointer == ',')
2411 ++input_line_pointer;
2413 seccmd = input_line_pointer;
2414 c = get_symbol_end ();
2415 if (strcasecmp (seccmd, "absolute") == 0)
2417 as_bad ("absolute sections are not supported");
2418 *input_line_pointer = c;
2419 ignore_rest_of_line ();
2422 else if (strcasecmp (seccmd, "align") == 0)
2426 *input_line_pointer = c;
2427 align = get_absolute_expression ();
2428 record_alignment (seg, align);
2432 as_warn ("unrecognized section command `%s'", seccmd);
2433 *input_line_pointer = c;
2437 demand_empty_rest_of_line ();
2439 #else /* ! TC_I960 */
2440 /* The MRI assembler seems to use different forms of .sect for
2441 different targets. */
2443 #endif /* ! TC_I960 */
2444 #endif /* ! TC_M68K */
2447 /* Handle the .print pseudo-op. */
2456 s = demand_copy_C_string (&len);
2458 demand_empty_rest_of_line ();
2461 /* Handle the .purgem pseudo-op. */
2467 if (is_it_end_of_statement ())
2469 demand_empty_rest_of_line ();
2479 name = input_line_pointer;
2480 c = get_symbol_end ();
2481 delete_macro (name);
2482 *input_line_pointer = c;
2485 while (*input_line_pointer++ == ',');
2487 --input_line_pointer;
2488 demand_empty_rest_of_line ();
2491 /* Handle the .rept pseudo-op. */
2501 count = get_absolute_expression ();
2504 if (! buffer_and_nest ("REPT", "ENDR", &one, get_line_sb))
2506 as_bad ("rept without endr");
2512 sb_add_sb (&many, &one);
2516 input_scrub_include_sb (&many, input_line_pointer);
2518 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2525 register char *name;
2526 register char delim;
2527 register char *end_name;
2528 register symbolS *symbolP;
2531 * Especial apologies for the random logic:
2532 * this just grew, and could be parsed much more simply!
2535 name = input_line_pointer;
2536 delim = get_symbol_end ();
2537 end_name = input_line_pointer;
2541 if (*input_line_pointer != ',')
2544 as_bad ("Expected comma after name \"%s\"", name);
2546 ignore_rest_of_line ();
2550 input_line_pointer++;
2553 if (name[0] == '.' && name[1] == '\0')
2555 /* Turn '. = mumble' into a .org mumble */
2556 register segT segment;
2559 segment = get_known_segmented_expression (&exp);
2562 do_org (segment, &exp, 0);
2568 if ((symbolP = symbol_find (name)) == NULL
2569 && (symbolP = md_undefined_symbol (name)) == NULL)
2571 symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag);
2573 /* "set" symbols are local unless otherwise specified. */
2574 SF_SET_LOCAL (symbolP);
2575 #endif /* OBJ_COFF */
2577 } /* make a new symbol */
2579 symbol_table_insert (symbolP);
2582 pseudo_set (symbolP);
2583 demand_empty_rest_of_line ();
2597 #ifdef md_flush_pending_output
2598 md_flush_pending_output ();
2602 stop = mri_comment_field (&stopc);
2604 /* In m68k MRI mode, we need to align to a word boundary, unless
2606 if (flag_m68k_mri && mult > 1)
2608 if (now_seg == absolute_section)
2610 abs_section_offset += abs_section_offset & 1;
2611 if (line_label != NULL)
2612 S_SET_VALUE (line_label, abs_section_offset);
2614 else if (mri_common_symbol != NULL)
2618 val = S_GET_VALUE (mri_common_symbol);
2621 S_SET_VALUE (mri_common_symbol, val + 1);
2622 if (line_label != NULL)
2624 know (line_label->sy_value.X_op == O_symbol);
2625 know (line_label->sy_value.X_add_symbol == mri_common_symbol);
2626 line_label->sy_value.X_add_number += 1;
2632 do_align (1, (char *) NULL, 0, 0);
2633 if (line_label != NULL)
2635 line_label->sy_frag = frag_now;
2636 S_SET_VALUE (line_label, frag_now_fix ());
2646 if (*input_line_pointer == ',')
2648 ++input_line_pointer;
2653 val.X_op = O_constant;
2654 val.X_add_number = 0;
2657 if (val.X_op != O_constant
2658 || val.X_add_number < - 0x80
2659 || val.X_add_number > 0xff
2660 || (mult != 0 && mult != 1 && val.X_add_number != 0))
2662 if (exp.X_op != O_constant)
2663 as_bad ("Unsupported variable size or fill value");
2670 bytes = mult * exp.X_add_number;
2671 for (i = 0; i < exp.X_add_number; i++)
2672 emit_expr (&val, mult);
2677 if (exp.X_op == O_constant)
2681 repeat = exp.X_add_number;
2687 if (! flag_mri || repeat < 0)
2688 as_warn (".space repeat count is %s, ignored",
2689 repeat ? "negative" : "zero");
2693 /* If we are in the absolute section, just bump the offset. */
2694 if (now_seg == absolute_section)
2696 abs_section_offset += repeat;
2700 /* If we are secretly in an MRI common section, then
2701 creating space just increases the size of the common
2703 if (mri_common_symbol != NULL)
2705 S_SET_VALUE (mri_common_symbol,
2706 S_GET_VALUE (mri_common_symbol) + repeat);
2711 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
2712 repeat, (char *) 0);
2716 if (now_seg == absolute_section)
2718 as_bad ("space allocation too complex in absolute section");
2719 subseg_set (text_section, 0);
2721 if (mri_common_symbol != NULL)
2723 as_bad ("space allocation too complex in common section");
2724 mri_common_symbol = NULL;
2727 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
2728 make_expr_symbol (&exp), 0L, (char *) 0);
2732 *p = val.X_add_number;
2737 /* In MRI mode, after an odd number of bytes, we must align to an
2738 even word boundary, unless the next instruction is a dc.b, ds.b
2740 if (flag_mri && (bytes & 1) != 0)
2741 mri_pending_align = 1;
2744 mri_comment_end (stop, stopc);
2746 demand_empty_rest_of_line ();
2749 /* This is like s_space, but the value is a floating point number with
2750 the given precision. This is for the MRI dcb.s pseudo-op and
2754 s_float_space (float_type)
2759 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
2764 stop = mri_comment_field (&stopc);
2766 count = get_absolute_expression ();
2769 if (*input_line_pointer != ',')
2771 as_bad ("missing value");
2773 mri_comment_end (stop, stopc);
2774 ignore_rest_of_line ();
2778 ++input_line_pointer;
2782 /* Skip any 0{letter} that may be present. Don't even check if the
2783 * letter is legal. */
2784 if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1]))
2785 input_line_pointer += 2;
2787 /* Accept :xxxx, where the x's are hex digits, for a floating point
2788 with the exact digits specified. */
2789 if (input_line_pointer[0] == ':')
2791 flen = hex_float (float_type, temp);
2795 mri_comment_end (stop, stopc);
2796 ignore_rest_of_line ();
2804 err = md_atof (float_type, temp, &flen);
2805 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
2809 as_bad ("Bad floating literal: %s", err);
2811 mri_comment_end (stop, stopc);
2812 ignore_rest_of_line ();
2817 while (--count >= 0)
2821 p = frag_more (flen);
2822 memcpy (p, temp, (unsigned int) flen);
2826 mri_comment_end (stop, stopc);
2828 demand_empty_rest_of_line ();
2831 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
2841 stop = mri_comment_field (&stopc);
2842 abs_section_offset = get_absolute_expression ();
2843 subseg_set (absolute_section, 0);
2845 mri_comment_end (stop, stopc);
2846 demand_empty_rest_of_line ();
2855 temp = get_absolute_expression ();
2856 subseg_set (text_section, (subsegT) temp);
2857 demand_empty_rest_of_line ();
2859 const_flag &= ~IN_DEFAULT_SECTION;
2865 demand_empty_rest_of_line ()
2868 if (is_end_of_line[(unsigned char) *input_line_pointer])
2870 input_line_pointer++;
2874 ignore_rest_of_line ();
2876 /* Return having already swallowed end-of-line. */
2877 } /* Return pointing just after end-of-line. */
2880 ignore_rest_of_line () /* For suspect lines: gives warning. */
2882 if (!is_end_of_line[(unsigned char) *input_line_pointer])
2884 if (isprint (*input_line_pointer))
2885 as_bad ("Rest of line ignored. First ignored character is `%c'.",
2886 *input_line_pointer);
2888 as_bad ("Rest of line ignored. First ignored character valued 0x%x.",
2889 *input_line_pointer);
2890 while (input_line_pointer < buffer_limit
2891 && !is_end_of_line[(unsigned char) *input_line_pointer])
2893 input_line_pointer++;
2896 input_line_pointer++; /* Return pointing just after end-of-line. */
2897 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
2903 * In: Pointer to a symbol.
2904 * Input_line_pointer->expression.
2906 * Out: Input_line_pointer->just after any whitespace after expression.
2907 * Tried to set symbol to value of expression.
2908 * Will change symbols type, value, and frag;
2911 pseudo_set (symbolP)
2915 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
2917 #endif /* OBJ_AOUT or OBJ_BOUT */
2919 know (symbolP); /* NULL pointer is logic error. */
2920 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
2921 ext = S_IS_EXTERNAL (symbolP);
2922 #endif /* OBJ_AOUT or OBJ_BOUT */
2924 (void) expression (&exp);
2926 if (exp.X_op == O_illegal)
2927 as_bad ("illegal expression; zero assumed");
2928 else if (exp.X_op == O_absent)
2929 as_bad ("missing expression; zero assumed");
2930 else if (exp.X_op == O_big)
2931 as_bad ("%s number invalid; zero assumed",
2932 exp.X_add_number > 0 ? "bignum" : "floating point");
2933 else if (exp.X_op == O_subtract
2934 && (S_GET_SEGMENT (exp.X_add_symbol)
2935 == S_GET_SEGMENT (exp.X_op_symbol))
2936 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
2937 && exp.X_add_symbol->sy_frag == exp.X_op_symbol->sy_frag)
2939 exp.X_op = O_constant;
2940 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
2941 - S_GET_VALUE (exp.X_op_symbol));
2949 exp.X_add_number = 0;
2952 S_SET_SEGMENT (symbolP, absolute_section);
2953 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
2955 S_SET_EXTERNAL (symbolP);
2957 S_CLEAR_EXTERNAL (symbolP);
2958 #endif /* OBJ_AOUT or OBJ_BOUT */
2959 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2960 symbolP->sy_frag = &zero_address_frag;
2964 S_SET_SEGMENT (symbolP, reg_section);
2965 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2966 symbolP->sy_frag = &zero_address_frag;
2970 if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section
2971 || exp.X_add_number != 0)
2972 symbolP->sy_value = exp;
2975 symbolS *s = exp.X_add_symbol;
2977 S_SET_SEGMENT (symbolP, S_GET_SEGMENT (s));
2978 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
2980 S_SET_EXTERNAL (symbolP);
2982 S_CLEAR_EXTERNAL (symbolP);
2983 #endif /* OBJ_AOUT or OBJ_BOUT */
2984 S_SET_VALUE (symbolP,
2985 exp.X_add_number + S_GET_VALUE (s));
2986 symbolP->sy_frag = s->sy_frag;
2987 copy_symbol_attributes (symbolP, s);
2992 /* The value is some complex expression.
2993 FIXME: Should we set the segment to anything? */
2994 symbolP->sy_value = exp;
3002 * CONStruct more frag of .bytes, or .words etc.
3003 * Should need_pass_2 be 1 then emit no frag(s).
3004 * This understands EXPRESSIONS.
3008 * This has a split personality. We use expression() to read the
3009 * value. We can detect if the value won't fit in a byte or word.
3010 * But we can't detect if expression() discarded significant digits
3011 * in the case of a long. Not worth the crocks required to fix it.
3014 /* Select a parser for cons expressions. */
3016 /* Some targets need to parse the expression in various fancy ways.
3017 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
3018 (for example, the HPPA does this). Otherwise, you can define
3019 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
3020 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
3021 are defined, which is the normal case, then only simple expressions
3025 parse_mri_cons PARAMS ((expressionS *exp, unsigned int nbytes));
3027 #ifndef TC_PARSE_CONS_EXPRESSION
3028 #ifdef BITFIELD_CONS_EXPRESSIONS
3029 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
3031 parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes));
3033 #ifdef REPEAT_CONS_EXPRESSIONS
3034 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
3036 parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes));
3039 /* If we haven't gotten one yet, just call expression. */
3040 #ifndef TC_PARSE_CONS_EXPRESSION
3041 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
3045 /* worker to do .byte etc statements */
3046 /* clobbers input_line_pointer, checks */
3049 cons_worker (nbytes, rva)
3050 register int nbytes; /* 1=.byte, 2=.word, 4=.long */
3058 #ifdef md_flush_pending_output
3059 md_flush_pending_output ();
3063 stop = mri_comment_field (&stopc);
3065 if (is_it_end_of_statement ())
3068 mri_comment_end (stop, stopc);
3069 demand_empty_rest_of_line ();
3073 #ifdef md_cons_align
3074 md_cons_align (nbytes);
3081 parse_mri_cons (&exp, (unsigned int) nbytes);
3083 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3087 if (exp.X_op == O_symbol)
3088 exp.X_op = O_symbol_rva;
3090 as_fatal ("rva without symbol");
3092 emit_expr (&exp, (unsigned int) nbytes);
3095 while (*input_line_pointer++ == ',');
3097 /* In MRI mode, after an odd number of bytes, we must align to an
3098 even word boundary, unless the next instruction is a dc.b, ds.b
3100 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3101 mri_pending_align = 1;
3103 input_line_pointer--; /* Put terminator back into stream. */
3106 mri_comment_end (stop, stopc);
3108 demand_empty_rest_of_line ();
3116 cons_worker (size, 0);
3123 cons_worker (size, 1);
3127 /* Put the contents of expression EXP into the object file using
3128 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3131 emit_expr (exp, nbytes)
3133 unsigned int nbytes;
3137 valueT extra_digit = 0;
3139 /* Don't do anything if we are going to make another pass. */
3145 /* Allow `.word 0' in the absolute section. */
3146 if (now_seg == absolute_section)
3148 if (op != O_constant || exp->X_add_number != 0)
3149 as_bad ("attempt to store value in absolute section");
3150 abs_section_offset += nbytes;
3154 /* Handle a negative bignum. */
3156 && exp->X_add_number == 0
3157 && exp->X_add_symbol->sy_value.X_op == O_big
3158 && exp->X_add_symbol->sy_value.X_add_number > 0)
3161 unsigned long carry;
3163 exp = &exp->X_add_symbol->sy_value;
3165 /* Negate the bignum: one's complement each digit and add 1. */
3167 for (i = 0; i < exp->X_add_number; i++)
3171 next = (((~ (generic_bignum[i] & LITTLENUM_MASK))
3174 generic_bignum[i] = next & LITTLENUM_MASK;
3175 carry = next >> LITTLENUM_NUMBER_OF_BITS;
3178 /* We can ignore any carry out, because it will be handled by
3179 extra_digit if it is needed. */
3181 extra_digit = (valueT) -1;
3185 if (op == O_absent || op == O_illegal)
3187 as_warn ("zero assumed for missing expression");
3188 exp->X_add_number = 0;
3191 else if (op == O_big && exp->X_add_number <= 0)
3193 as_bad ("floating point number invalid; zero assumed");
3194 exp->X_add_number = 0;
3197 else if (op == O_register)
3199 as_warn ("register value used as expression");
3203 p = frag_more ((int) nbytes);
3205 #ifndef WORKING_DOT_WORD
3206 /* If we have the difference of two symbols in a word, save it on
3207 the broken_words list. See the code in write.c. */
3208 if (op == O_subtract && nbytes == 2)
3210 struct broken_word *x;
3212 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
3213 x->next_broken_word = broken_words;
3216 x->word_goes_here = p;
3218 x->add = exp->X_add_symbol;
3219 x->sub = exp->X_op_symbol;
3220 x->addnum = exp->X_add_number;
3227 /* If we have an integer, but the number of bytes is too large to
3228 pass to md_number_to_chars, handle it as a bignum. */
3229 if (op == O_constant && nbytes > sizeof (valueT))
3234 if (! exp->X_unsigned && exp->X_add_number < 0)
3235 extra_digit = (valueT) -1;
3236 val = (valueT) exp->X_add_number;
3240 generic_bignum[gencnt] = val & LITTLENUM_MASK;
3241 val >>= LITTLENUM_NUMBER_OF_BITS;
3245 op = exp->X_op = O_big;
3246 exp->X_add_number = gencnt;
3249 if (op == O_constant)
3251 register valueT get;
3252 register valueT use;
3253 register valueT mask;
3255 register valueT unmask;
3257 /* JF << of >= number of bits in the object is undefined. In
3258 particular SPARC (Sun 4) has problems */
3259 if (nbytes >= sizeof (valueT))
3262 if (nbytes > sizeof (valueT))
3265 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3269 /* Don't store these bits. */
3270 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
3271 hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1);
3274 unmask = ~mask; /* Do store these bits. */
3277 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3278 mask = ~(unmask >> 1); /* Includes sign bit now. */
3281 get = exp->X_add_number;
3283 if ((get & mask) != 0
3284 && ((get & mask) != mask
3285 || (get & hibit) == 0))
3286 { /* Leading bits contain both 0s & 1s. */
3287 as_warn ("Value 0x%lx truncated to 0x%lx.",
3288 (unsigned long) get, (unsigned long) use);
3290 /* put bytes in right order. */
3291 md_number_to_chars (p, use, (int) nbytes);
3293 else if (op == O_big)
3296 LITTLENUM_TYPE *nums;
3298 know (nbytes % CHARS_PER_LITTLENUM == 0);
3300 size = exp->X_add_number * CHARS_PER_LITTLENUM;
3303 as_warn ("Bignum truncated to %d bytes", nbytes);
3307 if (target_big_endian)
3309 while (nbytes > size)
3311 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3312 nbytes -= CHARS_PER_LITTLENUM;
3313 p += CHARS_PER_LITTLENUM;
3316 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
3320 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3321 size -= CHARS_PER_LITTLENUM;
3322 p += CHARS_PER_LITTLENUM;
3327 nums = generic_bignum;
3330 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3332 size -= CHARS_PER_LITTLENUM;
3333 p += CHARS_PER_LITTLENUM;
3334 nbytes -= CHARS_PER_LITTLENUM;
3339 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3340 nbytes -= CHARS_PER_LITTLENUM;
3341 p += CHARS_PER_LITTLENUM;
3347 memset (p, 0, nbytes);
3349 /* Now we need to generate a fixS to record the symbol value.
3350 This is easy for BFD. For other targets it can be more
3351 complex. For very complex cases (currently, the HPPA and
3352 NS32K), you can define TC_CONS_FIX_NEW to do whatever you
3353 want. For simpler cases, you can define TC_CONS_RELOC to be
3354 the name of the reloc code that should be stored in the fixS.
3355 If neither is defined, the code uses NO_RELOC if it is
3356 defined, and otherwise uses 0. */
3358 #ifdef BFD_ASSEMBLER
3359 #ifdef TC_CONS_FIX_NEW
3360 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
3363 bfd_reloc_code_real_type r;
3380 as_bad ("unsupported BFD relocation size %u", nbytes);
3384 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp,
3389 #ifdef TC_CONS_FIX_NEW
3390 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
3392 /* Figure out which reloc number to use. Use TC_CONS_RELOC if
3393 it is defined, otherwise use NO_RELOC if it is defined,
3395 #ifndef TC_CONS_RELOC
3397 #define TC_CONS_RELOC NO_RELOC
3399 #define TC_CONS_RELOC 0
3402 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0,
3404 #endif /* TC_CONS_FIX_NEW */
3405 #endif /* BFD_ASSEMBLER */
3409 #ifdef BITFIELD_CONS_EXPRESSIONS
3411 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3412 w:x,y:z, where w and y are bitwidths and x and y are values. They
3413 then pack them all together. We do a little better in that we allow
3414 them in words, longs, etc. and we'll pack them in target byte order
3417 The rules are: pack least significat bit first, if a field doesn't
3418 entirely fit, put it in the next unit. Overflowing the bitfield is
3419 explicitly *not* even a warning. The bitwidth should be considered
3422 To use this function the tc-XXX.h file should define
3423 BITFIELD_CONS_EXPRESSIONS. */
3426 parse_bitfield_cons (exp, nbytes)
3428 unsigned int nbytes;
3430 unsigned int bits_available = BITS_PER_CHAR * nbytes;
3431 char *hold = input_line_pointer;
3433 (void) expression (exp);
3435 if (*input_line_pointer == ':')
3441 unsigned long width;
3443 if (*input_line_pointer != ':')
3445 input_line_pointer = hold;
3447 } /* next piece is not a bitfield */
3449 /* In the general case, we can't allow
3450 full expressions with symbol
3451 differences and such. The relocation
3452 entries for symbols not defined in this
3453 assembly would require arbitrary field
3454 widths, positions, and masks which most
3455 of our current object formats don't
3458 In the specific case where a symbol
3459 *is* defined in this assembly, we
3460 *could* build fixups and track it, but
3461 this could lead to confusion for the
3462 backends. I'm lazy. I'll take any
3463 SEG_ABSOLUTE. I think that means that
3464 you can use a previous .set or
3465 .equ type symbol. xoxorich. */
3467 if (exp->X_op == O_absent)
3469 as_warn ("using a bit field width of zero");
3470 exp->X_add_number = 0;
3471 exp->X_op = O_constant;
3472 } /* implied zero width bitfield */
3474 if (exp->X_op != O_constant)
3476 *input_line_pointer = '\0';
3477 as_bad ("field width \"%s\" too complex for a bitfield", hold);
3478 *input_line_pointer = ':';
3479 demand_empty_rest_of_line ();
3483 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
3485 as_warn ("field width %lu too big to fit in %d bytes: truncated to %d bits",
3486 width, nbytes, (BITS_PER_CHAR * nbytes));
3487 width = BITS_PER_CHAR * nbytes;
3490 if (width > bits_available)
3492 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
3493 input_line_pointer = hold;
3494 exp->X_add_number = value;
3498 hold = ++input_line_pointer; /* skip ':' */
3500 (void) expression (exp);
3501 if (exp->X_op != O_constant)
3503 char cache = *input_line_pointer;
3505 *input_line_pointer = '\0';
3506 as_bad ("field value \"%s\" too complex for a bitfield", hold);
3507 *input_line_pointer = cache;
3508 demand_empty_rest_of_line ();
3512 value |= ((~(-1 << width) & exp->X_add_number)
3513 << ((BITS_PER_CHAR * nbytes) - bits_available));
3515 if ((bits_available -= width) == 0
3516 || is_it_end_of_statement ()
3517 || *input_line_pointer != ',')
3520 } /* all the bitfields we're gonna get */
3522 hold = ++input_line_pointer;
3523 (void) expression (exp);
3524 } /* forever loop */
3526 exp->X_add_number = value;
3527 exp->X_op = O_constant;
3528 exp->X_unsigned = 1;
3529 } /* if looks like a bitfield */
3530 } /* parse_bitfield_cons() */
3532 #endif /* BITFIELD_CONS_EXPRESSIONS */
3534 /* Handle an MRI style string expression. */
3537 parse_mri_cons (exp, nbytes)
3539 unsigned int nbytes;
3541 if (*input_line_pointer != '\''
3542 && (input_line_pointer[1] != '\''
3543 || (*input_line_pointer != 'A'
3544 && *input_line_pointer != 'E')))
3545 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3549 unsigned int result = 0;
3551 /* An MRI style string. Cut into as many bytes as will fit into
3552 a nbyte chunk, left justify if necessary, and separate with
3553 commas so we can try again later. */
3554 if (*input_line_pointer == 'A')
3555 ++input_line_pointer;
3556 else if (*input_line_pointer == 'E')
3558 as_bad ("EBCDIC constants are not supported");
3559 ++input_line_pointer;
3562 input_line_pointer++;
3563 for (scan = 0; scan < nbytes; scan++)
3565 if (*input_line_pointer == '\'')
3567 if (input_line_pointer[1] == '\'')
3569 input_line_pointer++;
3574 result = (result << 8) | (*input_line_pointer++);
3578 while (scan < nbytes)
3583 /* Create correct expression */
3584 exp->X_op = O_constant;
3585 exp->X_add_number = result;
3586 /* Fake it so that we can read the next char too */
3587 if (input_line_pointer[0] != '\'' ||
3588 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
3590 input_line_pointer -= 2;
3591 input_line_pointer[0] = ',';
3592 input_line_pointer[1] = '\'';
3595 input_line_pointer++;
3599 #ifdef REPEAT_CONS_EXPRESSIONS
3601 /* Parse a repeat expression for cons. This is used by the MIPS
3602 assembler. The format is NUMBER:COUNT; NUMBER appears in the
3603 object file COUNT times.
3605 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
3608 parse_repeat_cons (exp, nbytes)
3610 unsigned int nbytes;
3617 if (*input_line_pointer != ':')
3619 /* No repeat count. */
3623 ++input_line_pointer;
3624 expression (&count);
3625 if (count.X_op != O_constant
3626 || count.X_add_number <= 0)
3628 as_warn ("Unresolvable or nonpositive repeat count; using 1");
3632 /* The cons function is going to output this expression once. So we
3633 output it count - 1 times. */
3634 for (i = count.X_add_number - 1; i > 0; i--)
3635 emit_expr (exp, nbytes);
3638 #endif /* REPEAT_CONS_EXPRESSIONS */
3640 /* Parse a floating point number represented as a hex constant. This
3641 permits users to specify the exact bits they want in the floating
3645 hex_float (float_type, bytes)
3679 as_bad ("Unknown floating type type '%c'", float_type);
3683 /* It would be nice if we could go through expression to parse the
3684 hex constant, but if we get a bignum it's a pain to sort it into
3685 the buffer correctly. */
3687 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
3691 /* The MRI assembler accepts arbitrary underscores strewn about
3692 through the hex constant, so we ignore them as well. */
3693 if (*input_line_pointer == '_')
3695 ++input_line_pointer;
3701 as_warn ("Floating point constant too large");
3704 d = hex_value (*input_line_pointer) << 4;
3705 ++input_line_pointer;
3706 while (*input_line_pointer == '_')
3707 ++input_line_pointer;
3708 if (hex_p (*input_line_pointer))
3710 d += hex_value (*input_line_pointer);
3711 ++input_line_pointer;
3713 if (target_big_endian)
3716 bytes[length - i - 1] = d;
3722 if (target_big_endian)
3723 memset (bytes + i, 0, length - i);
3725 memset (bytes, 0, length - i);
3734 * CONStruct some more frag chars of .floats .ffloats etc.
3735 * Makes 0 or more new frags.
3736 * If need_pass_2 == 1, no frags are emitted.
3737 * This understands only floating literals, not expressions. Sorry.
3739 * A floating constant is defined by atof_generic(), except it is preceded
3740 * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
3741 * reading, I decided to be incompatible. This always tries to give you
3742 * rounded bits to the precision of the pseudo-op. Former AS did premature
3743 * truncatation, restored noisy bits instead of trailing 0s AND gave you
3744 * a choice of 2 flavours of noise according to which of 2 floating-point
3745 * scanners you directed AS to use.
3747 * In: input_line_pointer->whitespace before, or '0' of flonum.
3752 float_cons (float_type)
3753 /* Clobbers input_line-pointer, checks end-of-line. */
3754 register int float_type; /* 'f':.ffloat ... 'F':.float ... */
3757 int length; /* Number of chars in an object. */
3758 register char *err; /* Error from scanning floating literal. */
3759 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3761 if (is_it_end_of_statement ())
3763 demand_empty_rest_of_line ();
3767 #ifdef md_flush_pending_output
3768 md_flush_pending_output ();
3773 /* input_line_pointer->1st char of a flonum (we hope!). */
3776 /* Skip any 0{letter} that may be present. Don't even check if the
3777 * letter is legal. Someone may invent a "z" format and this routine
3778 * has no use for such information. Lusers beware: you get
3779 * diagnostics if your input is ill-conditioned.
3781 if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1]))
3782 input_line_pointer += 2;
3784 /* Accept :xxxx, where the x's are hex digits, for a floating
3785 point with the exact digits specified. */
3786 if (input_line_pointer[0] == ':')
3788 ++input_line_pointer;
3789 length = hex_float (float_type, temp);
3792 ignore_rest_of_line ();
3798 err = md_atof (float_type, temp, &length);
3799 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
3803 as_bad ("Bad floating literal: %s", err);
3804 ignore_rest_of_line ();
3815 #ifdef REPEAT_CONS_EXPRESSIONS
3816 if (*input_line_pointer == ':')
3818 expressionS count_exp;
3820 ++input_line_pointer;
3821 expression (&count_exp);
3822 if (count_exp.X_op != O_constant
3823 || count_exp.X_add_number <= 0)
3825 as_warn ("unresolvable or nonpositive repeat count; using 1");
3828 count = count_exp.X_add_number;
3832 while (--count >= 0)
3834 p = frag_more (length);
3835 memcpy (p, temp, (unsigned int) length);
3840 while (*input_line_pointer++ == ',');
3842 --input_line_pointer; /* Put terminator back into stream. */
3843 demand_empty_rest_of_line ();
3844 } /* float_cons() */
3849 * We read 0 or more ',' seperated, double-quoted strings.
3851 * Caller should have checked need_pass_2 is FALSE because we don't check it.
3856 stringer (append_zero) /* Worker to do .ascii etc statements. */
3857 /* Checks end-of-line. */
3858 register int append_zero; /* 0: don't append '\0', else 1 */
3860 register unsigned int c;
3862 #ifdef md_flush_pending_output
3863 md_flush_pending_output ();
3867 * The following awkward logic is to parse ZERO or more strings,
3868 * comma seperated. Recall a string expression includes spaces
3869 * before the opening '\"' and spaces after the closing '\"'.
3870 * We fake a leading ',' if there is (supposed to be)
3871 * a 1st, expression. We keep demanding expressions for each
3874 if (is_it_end_of_statement ())
3876 c = 0; /* Skip loop. */
3877 ++input_line_pointer; /* Compensate for end of loop. */
3881 c = ','; /* Do loop. */
3883 while (c == ',' || c == '<' || c == '"')
3886 switch (*input_line_pointer)
3889 ++input_line_pointer; /*->1st char of string. */
3890 while (is_a_char (c = next_char_of_string ()))
3892 FRAG_APPEND_1_CHAR (c);
3896 FRAG_APPEND_1_CHAR (0);
3898 know (input_line_pointer[-1] == '\"');
3901 input_line_pointer++;
3902 c = get_single_number ();
3903 FRAG_APPEND_1_CHAR (c);
3904 if (*input_line_pointer != '>')
3906 as_bad ("Expected <nn>");
3908 input_line_pointer++;
3911 input_line_pointer++;
3915 c = *input_line_pointer;
3918 demand_empty_rest_of_line ();
3921 /* FIXME-SOMEDAY: I had trouble here on characters with the
3922 high bits set. We'll probably also have trouble with
3923 multibyte chars, wide chars, etc. Also be careful about
3924 returning values bigger than 1 byte. xoxorich. */
3927 next_char_of_string ()
3929 register unsigned int c;
3931 c = *input_line_pointer++ & CHAR_MASK;
3939 as_warn ("Unterminated string: Newline inserted.");
3940 bump_line_counters ();
3943 #ifndef NO_STRING_ESCAPES
3945 switch (c = *input_line_pointer++)
3973 break; /* As itself. */
3989 for (i = 0, number = 0; isdigit (c) && i < 3; c = *input_line_pointer++, i++)
3991 number = number * 8 + c - '0';
3995 --input_line_pointer;
4004 c = *input_line_pointer++;
4005 while (isxdigit (c))
4008 number = number * 16 + c - '0';
4009 else if (isupper (c))
4010 number = number * 16 + c - 'A' + 10;
4012 number = number * 16 + c - 'a' + 10;
4013 c = *input_line_pointer++;
4016 --input_line_pointer;
4021 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
4022 as_warn ("Unterminated string: Newline inserted.");
4024 bump_line_counters ();
4029 #ifdef ONLY_STANDARD_ESCAPES
4030 as_bad ("Bad escaped character in string, '?' assumed");
4032 #endif /* ONLY_STANDARD_ESCAPES */
4035 } /* switch on escaped char */
4037 #endif /* ! defined (NO_STRING_ESCAPES) */
4041 } /* switch on char */
4043 } /* next_char_of_string() */
4046 get_segmented_expression (expP)
4047 register expressionS *expP;
4049 register segT retval;
4051 retval = expression (expP);
4052 if (expP->X_op == O_illegal
4053 || expP->X_op == O_absent
4054 || expP->X_op == O_big)
4056 as_bad ("expected address expression; zero assumed");
4057 expP->X_op = O_constant;
4058 expP->X_add_number = 0;
4059 retval = absolute_section;
4065 get_known_segmented_expression (expP)
4066 register expressionS *expP;
4068 register segT retval;
4070 if ((retval = get_segmented_expression (expP)) == undefined_section)
4072 /* There is no easy way to extract the undefined symbol from the
4074 if (expP->X_add_symbol != NULL
4075 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
4076 as_warn ("symbol \"%s\" undefined; zero assumed",
4077 S_GET_NAME (expP->X_add_symbol));
4079 as_warn ("some symbol undefined; zero assumed");
4080 retval = absolute_section;
4081 expP->X_op = O_constant;
4082 expP->X_add_number = 0;
4084 know (retval == absolute_section || SEG_NORMAL (retval));
4086 } /* get_known_segmented_expression() */
4089 get_absolute_expression ()
4094 if (exp.X_op != O_constant)
4096 if (exp.X_op != O_absent)
4097 as_bad ("bad or irreducible absolute expression; zero assumed");
4098 exp.X_add_number = 0;
4100 return exp.X_add_number;
4103 char /* return terminator */
4104 get_absolute_expression_and_terminator (val_pointer)
4105 long *val_pointer; /* return value of expression */
4107 /* FIXME: val_pointer should probably be offsetT *. */
4108 *val_pointer = (long) get_absolute_expression ();
4109 return (*input_line_pointer++);
4113 * demand_copy_C_string()
4115 * Like demand_copy_string, but return NULL if the string contains any '\0's.
4116 * Give a warning if that happens.
4119 demand_copy_C_string (len_pointer)
4124 if ((s = demand_copy_string (len_pointer)) != 0)
4128 for (len = *len_pointer; len > 0; len--)
4135 as_bad ("This string may not contain \'\\0\'");
4143 * demand_copy_string()
4145 * Demand string, but return a safe (=private) copy of the string.
4146 * Return NULL if we can't read a string here.
4149 demand_copy_string (lenP)
4152 register unsigned int c;
4158 if (*input_line_pointer == '\"')
4160 input_line_pointer++; /* Skip opening quote. */
4162 while (is_a_char (c = next_char_of_string ()))
4164 obstack_1grow (¬es, c);
4167 /* JF this next line is so demand_copy_C_string will return a
4168 null terminated string. */
4169 obstack_1grow (¬es, '\0');
4170 retval = obstack_finish (¬es);
4174 as_warn ("Missing string");
4176 ignore_rest_of_line ();
4180 } /* demand_copy_string() */
4183 * is_it_end_of_statement()
4185 * In: Input_line_pointer->next character.
4187 * Do: Skip input_line_pointer over all whitespace.
4189 * Out: 1 if input_line_pointer->end-of-line.
4192 is_it_end_of_statement ()
4195 return (is_end_of_line[(unsigned char) *input_line_pointer]);
4196 } /* is_it_end_of_statement() */
4199 equals (sym_name, reassign)
4203 register symbolS *symbolP; /* symbol we are working with */
4207 input_line_pointer++;
4208 if (*input_line_pointer == '=')
4209 input_line_pointer++;
4211 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
4212 input_line_pointer++;
4215 stop = mri_comment_field (&stopc);
4217 if (sym_name[0] == '.' && sym_name[1] == '\0')
4219 /* Turn '. = mumble' into a .org mumble */
4220 register segT segment;
4223 segment = get_known_segmented_expression (&exp);
4225 do_org (segment, &exp, 0);
4229 symbolP = symbol_find_or_make (sym_name);
4230 /* Permit register names to be redefined. */
4232 && S_IS_DEFINED (symbolP)
4233 && S_GET_SEGMENT (symbolP) != reg_section)
4234 as_bad ("symbol `%s' already defined", S_GET_NAME (symbolP));
4235 pseudo_set (symbolP);
4239 mri_comment_end (stop, stopc);
4242 /* .include -- include a file at this point. */
4255 if (! flag_m68k_mri)
4256 filename = demand_copy_string (&i);
4261 while (! is_end_of_line[(unsigned char) *input_line_pointer]
4262 && *input_line_pointer != ' '
4263 && *input_line_pointer != '\t')
4265 obstack_1grow (¬es, *input_line_pointer);
4266 ++input_line_pointer;
4269 obstack_1grow (¬es, '\0');
4270 filename = obstack_finish (¬es);
4271 while (! is_end_of_line[(unsigned char) *input_line_pointer])
4272 ++input_line_pointer;
4274 demand_empty_rest_of_line ();
4275 path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ );
4276 for (i = 0; i < include_dir_count; i++)
4278 strcpy (path, include_dirs[i]);
4280 strcat (path, filename);
4281 if (0 != (try = fopen (path, "r")))
4290 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
4291 newbuf = input_scrub_include_file (path, input_line_pointer);
4292 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
4296 add_include_dir (path)
4301 if (include_dir_count == 0)
4303 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
4304 include_dirs[0] = "."; /* Current dir */
4305 include_dir_count = 2;
4309 include_dir_count++;
4310 include_dirs = (char **) realloc (include_dirs,
4311 include_dir_count * sizeof (*include_dirs));
4314 include_dirs[include_dir_count - 1] = path; /* New one */
4317 if (i > include_dir_maxlen)
4318 include_dir_maxlen = i;
4319 } /* add_include_dir() */
4325 while (!is_end_of_line[(unsigned char) *input_line_pointer])
4327 ++input_line_pointer;
4329 ++input_line_pointer;
4334 read_print_statistics (file)
4337 hash_print_statistics (file, "pseudo-op table", po_hash);