1 /* read.c - read a source file -
2 Copyright (C) 1986, 87, 90, 91, 92, 93, 94, 95, 1996
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
19 the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 #define MASK_CHAR (0xFF) /* If your chars aren't 8 bits, you will
23 change this a bit. But then, GNU isn't
24 spozed to run on your machine anyway.
25 (RMS is so shortsighted sometimes.)
28 #define MASK_CHAR ((int)(unsigned char)-1)
32 /* This is the largest known floating point format (for now). It will
33 grow when we do 4361 style flonums. */
35 #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
37 /* Routines that read assembler source text to build spagetti in memory.
38 Another group of these functions is in the expr.c module. */
47 #include "libiberty.h"
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 $. */
99 /* used by is_... macros. our ctype[] */
102 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
103 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
104 0, 0, 0, 0, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
105 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
106 LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
107 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
108 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
109 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 0, /* pqrstuvwxyz{|}~. */
110 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
111 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
112 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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,
122 * Out: 1 if this character ends a line.
125 char is_end_of_line[256] =
128 _, _, _, _, _, _, _, _, _, _, 99, _, _, 99, _, _, /* @abcdefghijklmno */
130 _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, _, /* @abcdefghijklmno */
132 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
134 _,99, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* _!"#$%&'()*+,-./ */
135 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0123456789:;<=>? */
137 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
138 _, _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, /* 0123456789:;<=>? */
140 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
141 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
142 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
143 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
144 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
145 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
146 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
147 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
148 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
152 /* Functions private to this file. */
154 static char *buffer; /* 1st char of each buffer of lines is here. */
155 static char *buffer_limit; /*->1 + last char in buffer. */
157 #ifdef TARGET_BYTES_BIG_ENDIAN
158 /* Hack to deal with tc-*.h defining TARGET_BYTES_BIG_ENDIAN to empty
159 instead of to 0 or 1. */
160 #if 5 - TARGET_BYTES_BIG_ENDIAN - 5 == 10
161 #undef TARGET_BYTES_BIG_ENDIAN
162 #define TARGET_BYTES_BIG_ENDIAN 1
164 int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
166 int target_big_endian /* = 0 */;
169 static char *old_buffer; /* JF a hack */
170 static char *old_input;
171 static char *old_limit;
173 /* Variables for handling include file directory list. */
175 char **include_dirs; /* List of pointers to directories to
176 search for .include's */
177 int include_dir_count; /* How many are in the list */
178 int include_dir_maxlen = 1;/* Length of longest in list */
180 #ifndef WORKING_DOT_WORD
181 struct broken_word *broken_words;
182 int new_broken_words;
185 /* The current offset into the absolute section. We don't try to
186 build frags in the absolute section, since no data can be stored
187 there. We just keep track of the current offset. */
188 addressT abs_section_offset;
190 /* If this line had an MRI style label, it is stored in this variable.
191 This is used by some of the MRI pseudo-ops. */
194 /* This global variable is used to support MRI common sections. We
195 translate such sections into a common symbol. This variable is
196 non-NULL when we are in an MRI common section. */
197 symbolS *mri_common_symbol;
199 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
200 need to align to an even byte boundary unless the next pseudo-op is
201 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
203 static int mri_pending_align;
205 static int scrub_from_string PARAMS ((char **));
206 static void do_align PARAMS ((int, char *, int));
207 static int hex_float PARAMS ((int, char *));
208 static void do_org PARAMS ((segT, expressionS *, int));
209 char *demand_copy_string PARAMS ((int *lenP));
210 static segT get_segmented_expression PARAMS ((expressionS *expP));
211 static segT get_known_segmented_expression PARAMS ((expressionS * expP));
212 static void pobegin PARAMS ((void));
213 static int get_line_sb PARAMS ((sb *));
222 obj_read_begin_hook ();
224 /* Something close -- but not too close -- to a multiple of 1024.
225 The debugging malloc I'm using has 24 bytes of overhead. */
226 obstack_begin (¬es, chunksize);
227 obstack_begin (&cond_obstack, chunksize);
229 /* Use machine dependent syntax */
230 for (p = line_separator_chars; *p; p++)
231 is_end_of_line[(unsigned char) *p] = 1;
232 /* Use more. FIXME-SOMEDAY. */
238 /* set up pseudo-op tables */
240 static struct hash_control *po_hash;
242 static const pseudo_typeS potable[] =
244 {"abort", s_abort, 0},
245 {"align", s_align_ptwo, 0},
246 {"ascii", stringer, 0},
247 {"asciz", stringer, 1},
248 {"balign", s_align_bytes, 0},
249 {"balignw", s_align_bytes, -2},
250 {"balignl", s_align_bytes, -4},
254 {"common", s_mri_common, 0},
255 {"common.s", s_mri_common, 1},
259 {"dc.d", float_cons, 'd'},
261 {"dc.s", float_cons, 'f'},
263 {"dc.x", float_cons, 'x'},
265 {"dcb.b", s_space, 1},
266 {"dcb.d", s_float_space, 'd'},
267 {"dcb.l", s_space, 4},
268 {"dcb.s", s_float_space, 'f'},
269 {"dcb.w", s_space, 2},
270 {"dcb.x", s_float_space, 'x'},
272 {"ds.b", s_space, 1},
273 {"ds.d", s_space, 8},
274 {"ds.l", s_space, 4},
275 {"ds.p", s_space, 12},
276 {"ds.s", s_space, 4},
277 {"ds.w", s_space, 2},
278 {"ds.x", s_space, 12},
279 {"debug", s_ignore, 0},
284 {"double", float_cons, 'd'},
286 {"eject", listing_eject, 0}, /* Formfeed listing */
288 {"elsec", s_else, 0},
290 {"endc", s_endif, 0},
291 {"endif", s_endif, 0},
295 {"exitm", s_mexit, 0},
297 {"extern", s_ignore, 0}, /* We treat all undef as ext */
298 {"appfile", s_app_file, 1},
299 {"appline", s_app_line, 0},
301 {"file", s_app_file, 0},
303 {"float", float_cons, 'f'},
304 {"format", s_ignore, 0},
305 {"global", s_globl, 0},
306 {"globl", s_globl, 0},
308 {"if", s_if, (int) O_ne},
310 {"ifdef", s_ifdef, 0},
311 {"ifeq", s_if, (int) O_eq},
312 {"ifeqs", s_ifeqs, 0},
313 {"ifge", s_if, (int) O_ge},
314 {"ifgt", s_if, (int) O_gt},
315 {"ifle", s_if, (int) O_le},
316 {"iflt", s_if, (int) O_lt},
318 {"ifndef", s_ifdef, 1},
319 {"ifne", s_if, (int) O_ne},
320 {"ifnes", s_ifeqs, 1},
321 {"ifnotdef", s_ifdef, 1},
322 {"include", s_include, 0},
328 {"lcomm", s_lcomm, 0},
329 {"lflags", listing_flags, 0}, /* Listing flags */
330 {"linkonce", s_linkonce, 0},
331 {"list", listing_list, 1}, /* Turn listing on */
332 {"llen", listing_psize, 1},
335 {"macro", s_macro, 0},
336 {"mexit", s_mexit, 0},
338 {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
339 {"name", s_ignore, 0},
340 {"noformat", s_ignore, 0},
341 {"nolist", listing_list, 0}, /* Turn listing off */
342 {"nopage", listing_nopage, 0},
344 {"offset", s_struct, 0},
346 {"p2align", s_align_ptwo, 0},
347 {"p2alignw", s_align_ptwo, -2},
348 {"p2alignl", s_align_ptwo, -4},
349 {"page", listing_eject, 0},
350 {"plen", listing_psize, 0},
351 {"print", s_print, 0},
352 {"psize", listing_psize, 0}, /* set paper size */
353 {"purgem", s_purgem, 0},
358 {"sbttl", listing_title, 1}, /* Subtitle of listing */
363 {"single", float_cons, 'f'},
365 {"space", s_space, 0},
366 {"skip", s_space, 0},
367 {"spc", s_ignore, 0},
368 {"stabd", s_stab, 'd'},
369 {"stabn", s_stab, 'n'},
370 {"stabs", s_stab, 's'},
371 {"string", stringer, 1},
372 {"struct", s_struct, 0},
376 /* This is for gcc to use. It's only just been added (2/94), so gcc
377 won't be able to use it for a while -- probably a year or more.
378 But once this has been released, check with gcc maintainers
379 before deleting it or even changing the spelling. */
380 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
381 /* If we're folding case -- done for some targets, not necessarily
382 all -- the above string in an input file will be converted to
383 this one. Match it either way... */
384 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
386 {"title", listing_title, 0}, /* Listing title */
387 {"ttl", listing_title, 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 ("");
492 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
493 { /* We have another line to parse. */
494 know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */
495 contin: /* JF this goto is my fault I admit it.
496 Someone brave please re-write the whole
497 input section here? Pleeze??? */
498 while (input_line_pointer < buffer_limit)
500 /* We have more of this buffer to parse. */
503 * We now have input_line_pointer->1st char of next line.
504 * If input_line_pointer [-1] == '\n' then we just
505 * scanned another line: so bump line counters.
507 if (is_end_of_line[(unsigned char) input_line_pointer[-1]])
509 #ifdef md_start_line_hook
510 md_start_line_hook ();
513 if (input_line_pointer[-1] == '\n')
514 bump_line_counters ();
519 #ifdef LABELS_WITHOUT_COLONS
524 /* Text at the start of a line must be a label, we
525 run down and stick a colon in. */
526 if (is_name_beginner (*input_line_pointer))
528 char *line_start = input_line_pointer;
531 HANDLE_CONDITIONAL_ASSEMBLY ();
533 c = get_symbol_end ();
535 /* In MRI mode, the EQU pseudoop must be
536 handled specially. */
539 char *rest = input_line_pointer + 1;
543 if (*rest == ' ' || *rest == '\t')
545 if ((strncasecmp (rest, "EQU", 3) == 0
546 || strncasecmp (rest, "SET", 3) == 0)
547 && (rest[3] == ' ' || rest[3] == '\t'))
549 input_line_pointer = rest + 3;
555 line_label = colon (line_start);
557 *input_line_pointer = c;
559 input_line_pointer++;
565 * We are at the begining of a line, or similar place.
566 * We expect a well-formed assembler statement.
567 * A "symbol-name:" is a statement.
569 * Depending on what compiler is used, the order of these tests
570 * may vary to catch most common case 1st.
571 * Each test is independent of all other tests at the (top) level.
572 * PLEASE make a compiler that doesn't use this assembler.
573 * It is crufty to waste a compiler's time encoding things for this
574 * assembler, which then wastes more time decoding it.
575 * (And communicating via (linear) files is silly!
576 * If you must pass stuff, please pass a tree!)
578 if ((c = *input_line_pointer++) == '\t'
583 c = *input_line_pointer++;
585 know (c != ' '); /* No further leading whitespace. */
588 * C is the 1st significant character.
589 * Input_line_pointer points after that character.
591 if (is_name_beginner (c))
593 /* want user-defined label or pseudo/opcode */
594 HANDLE_CONDITIONAL_ASSEMBLY ();
596 s = --input_line_pointer;
597 c = get_symbol_end (); /* name's delimiter */
599 * C is character after symbol.
600 * That character's place in the input line is now '\0'.
601 * S points to the beginning of the symbol.
602 * [In case of pseudo-op, s->'.'.]
603 * Input_line_pointer->'\0' where c was.
605 if (TC_START_LABEL(c, input_line_pointer))
609 char *rest = input_line_pointer + 1;
611 /* In MRI mode, \tsym: set 0 is permitted. */
615 if (*rest == ' ' || *rest == '\t')
617 if ((strncasecmp (rest, "EQU", 3) == 0
618 || strncasecmp (rest, "SET", 3) == 0)
619 && (rest[3] == ' ' || rest[3] == '\t'))
621 input_line_pointer = rest + 3;
627 line_label = colon (s); /* user-defined label */
628 *input_line_pointer++ = ':'; /* Put ':' back for error messages' sake. */
629 /* Input_line_pointer->after ':'. */
635 || (input_line_pointer[1] == '='
636 #ifdef TC_EQUAL_IN_INSN
637 && ! TC_EQUAL_IN_INSN (c, input_line_pointer)
642 demand_empty_rest_of_line ();
645 { /* expect pseudo-op or machine instruction */
648 #define IGNORE_OPCODE_CASE
649 #ifdef IGNORE_OPCODE_CASE
667 /* The MRI assembler and the m88k use pseudo-ops
669 pop = (pseudo_typeS *) hash_find (po_hash, s);
670 if (pop != NULL && pop->poc_handler == NULL)
675 || (! flag_m68k_mri && *s == '.'))
680 * WARNING: c has next char, which may be end-of-line.
681 * We lookup the pseudo-op table with s+1 because we
682 * already know that the pseudo-op begins with a '.'.
686 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
688 /* In MRI mode, we may need to insert an
689 automatic alignment directive. What a hack
691 if (mri_pending_align
693 || ! ((pop->poc_handler == cons
694 && pop->poc_val == 1)
695 || (pop->poc_handler == s_space
696 && pop->poc_val == 1))))
698 do_align (1, (char *) NULL, 0);
699 mri_pending_align = 0;
702 /* Print the error msg now, while we still can */
705 as_bad ("Unknown pseudo-op: `%s'", s);
706 *input_line_pointer = c;
711 /* Put it back for error messages etc. */
712 *input_line_pointer = c;
713 /* The following skip of whitespace is compulsory.
714 A well shaped space is sometimes all that separates
715 keyword from operands. */
716 if (c == ' ' || c == '\t')
717 input_line_pointer++;
719 * Input_line is restored.
720 * Input_line_pointer->1st non-blank char
721 * after pseudo-operation.
723 (*pop->poc_handler) (pop->poc_val);
725 /* If that was .end, just get out now. */
726 if (pop->poc_handler == s_end)
730 { /* machine instruction */
733 if (mri_pending_align)
735 do_align (1, (char *) NULL, 0);
736 mri_pending_align = 0;
739 /* WARNING: c has char, which may be end-of-line. */
740 /* Also: input_line_pointer->`\0` where c was. */
741 *input_line_pointer = c;
742 while (!is_end_of_line[(unsigned char) *input_line_pointer]
744 #ifdef TC_EOL_IN_INSN
745 || TC_EOL_IN_INSN (input_line_pointer)
749 if (flag_m68k_mri && *input_line_pointer == '\'')
751 input_line_pointer++;
754 c = *input_line_pointer;
755 *input_line_pointer = '\0';
757 #ifdef OBJ_GENERATE_ASM_LINENO
758 if (generate_asm_lineno == 0)
760 if (ecoff_no_current_file ())
761 generate_asm_lineno = 1;
763 if (generate_asm_lineno == 1)
768 as_where (&s, &lineno);
769 OBJ_GENERATE_ASM_LINENO (s, lineno);
778 if (check_macro (s, &out, '\0', &err))
782 *input_line_pointer++ = c;
783 input_scrub_include_sb (&out,
787 input_scrub_next_buffer (&input_line_pointer);
792 md_assemble (s); /* Assemble 1 instruction. */
794 *input_line_pointer++ = c;
796 /* We resume loop AFTER the end-of-line from
801 } /* if (is_name_beginner(c) */
804 /* Empty statement? */
805 if (is_end_of_line[(unsigned char) c])
808 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB)
811 /* local label ("4:") */
812 char *backup = input_line_pointer;
814 HANDLE_CONDITIONAL_ASSEMBLY ();
818 while (isdigit (*input_line_pointer))
820 temp = (temp * 10) + *input_line_pointer - '0';
821 ++input_line_pointer;
822 } /* read the whole number */
824 if (LOCAL_LABELS_DOLLAR
825 && *input_line_pointer == '$'
826 && *(input_line_pointer + 1) == ':')
828 input_line_pointer += 2;
830 if (dollar_label_defined (temp))
832 as_fatal ("label \"%d$\" redefined", temp);
835 define_dollar_label (temp);
836 colon (dollar_label_name (temp, 0));
841 && *input_line_pointer++ == ':')
843 fb_label_instance_inc (temp);
844 colon (fb_label_name (temp, 0));
848 input_line_pointer = backup;
849 } /* local label ("4:") */
851 if (c && strchr (line_comment_chars, c))
852 { /* Its a comment. Better say APP or NO_APP */
856 unsigned int new_length;
859 bump_line_counters ();
860 s = input_line_pointer;
861 if (strncmp (s, "APP\n", 4))
862 continue; /* We ignore it */
865 ends = strstr (s, "#NO_APP\n");
869 unsigned int tmp_len;
872 /* The end of the #APP wasn't in this buffer. We
873 keep reading in buffers until we find the #NO_APP
874 that goes with this #APP There is one. The specs
876 tmp_len = buffer_limit - s;
877 tmp_buf = xmalloc (tmp_len + 1);
878 memcpy (tmp_buf, s, tmp_len);
881 new_tmp = input_scrub_next_buffer (&buffer);
885 buffer_limit = new_tmp;
886 input_line_pointer = buffer;
887 ends = strstr (buffer, "#NO_APP\n");
891 num = buffer_limit - buffer;
893 tmp_buf = xrealloc (tmp_buf, tmp_len + num);
894 memcpy (tmp_buf + tmp_len, buffer, num);
899 input_line_pointer = ends ? ends + 8 : NULL;
907 input_line_pointer = ends + 8;
911 scrub_string_end = ends;
913 new_length = ends - s;
914 new_buf = (char *) xmalloc (new_length);
921 space = (new_buf + new_length) - new_tmp;
922 size = do_scrub_chars (scrub_from_string, new_tmp, space);
930 new_buf = xrealloc (new_buf, new_length + 100);
931 new_tmp = new_buf + new_length;
938 old_input = input_line_pointer;
939 old_limit = buffer_limit;
941 input_line_pointer = new_buf;
942 buffer_limit = new_tmp;
946 HANDLE_CONDITIONAL_ASSEMBLY ();
948 #ifdef tc_unrecognized_line
949 if (tc_unrecognized_line (c))
953 /* as_warn("Junk character %d.",c); Now done by ignore_rest */
954 input_line_pointer--; /* Report unknown char as ignored. */
955 ignore_rest_of_line ();
956 } /* while (input_line_pointer<buffer_limit) */
958 #ifdef md_after_pass_hook
959 md_after_pass_hook ();
965 bump_line_counters ();
969 input_line_pointer = old_input;
970 buffer_limit = old_limit;
975 } /* while (more buffers to scan) */
978 input_scrub_close (); /* Close the input file */
981 /* For most MRI pseudo-ops, the line actually ends at the first
982 nonquoted space. This function looks for that point, stuffs a null
983 in, and sets *STOPCP to the character that used to be there, and
984 returns the location.
986 Until I hear otherwise, I am going to assume that this is only true
987 for the m68k MRI assembler. */
990 mri_comment_field (stopcp)
998 know (flag_m68k_mri);
1000 for (s = input_line_pointer;
1001 ((! is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
1006 inquote = ! inquote;
1016 for (s = input_line_pointer; ! is_end_of_line[(unsigned char) *s]; s++)
1026 /* Skip to the end of an MRI comment field. */
1029 mri_comment_end (stop, stopc)
1035 input_line_pointer = stop;
1037 while (! is_end_of_line[(unsigned char) *input_line_pointer])
1038 ++input_line_pointer;
1045 as_fatal (".abort detected. Abandoning ship.");
1048 /* Guts of .align directive. */
1050 do_align (n, fill, len)
1056 md_do_align (n, fill, len, just_record_alignment);
1060 /* @@ Fix this right for BFD! */
1062 static char nop_opcode = NOP_OPCODE;
1064 if (now_seg != data_section && now_seg != bss_section)
1075 /* Only make a frag if we HAVE to. . . */
1076 if (n && !need_pass_2)
1079 frag_align (n, *fill);
1081 frag_align_pattern (n, fill, len);
1085 just_record_alignment:
1088 record_alignment (now_seg, n);
1091 /* For machines where ".align 4" means align to a 4 byte boundary. */
1096 register unsigned int temp;
1099 unsigned long max_alignment = 1 << 15;
1104 stop = mri_comment_field (&stopc);
1106 if (is_end_of_line[(unsigned char) *input_line_pointer])
1111 temp = arg; /* Default value from pseudo-op table */
1114 temp = get_absolute_expression ();
1116 if (temp > max_alignment)
1118 as_bad ("Alignment too large: %d. assumed.", temp = max_alignment);
1121 /* For the sparc, `.align (1<<n)' actually means `.align n' so we
1122 have to convert it. */
1125 for (i = 0; (temp & 1) == 0; temp >>= 1, ++i)
1129 as_bad ("Alignment not a power of 2");
1132 if (*input_line_pointer == ',')
1137 input_line_pointer++;
1138 fillval = get_absolute_expression ();
1145 temp_fill = fillval;
1146 do_align (temp, &temp_fill, len);
1152 if (len > sizeof ab)
1154 md_number_to_chars (ab, fillval, len);
1155 do_align (temp, ab, len);
1161 as_warn ("expected fill pattern missing");
1162 do_align (temp, (char *) NULL, 0);
1166 mri_comment_end (stop, stopc);
1168 demand_empty_rest_of_line ();
1171 /* For machines where ".align 4" means align to 2**4 boundary. */
1178 long max_alignment = 15;
1183 stop = mri_comment_field (&stopc);
1185 temp = get_absolute_expression ();
1186 if (temp > max_alignment)
1187 as_bad ("Alignment too large: %d. assumed.", temp = max_alignment);
1190 as_bad ("Alignment negative. 0 assumed.");
1193 if (*input_line_pointer == ',')
1198 input_line_pointer++;
1199 fillval = get_absolute_expression ();
1206 temp_fill = fillval;
1207 do_align (temp, &temp_fill, len);
1213 if (len > sizeof ab)
1215 md_number_to_chars (ab, fillval, len);
1216 do_align (temp, ab, len);
1222 as_warn ("expected fill pattern missing");
1223 do_align (temp, (char *) NULL, 0);
1227 mri_comment_end (stop, stopc);
1229 demand_empty_rest_of_line ();
1236 register char *name;
1240 register symbolS *symbolP;
1245 stop = mri_comment_field (&stopc);
1247 name = input_line_pointer;
1248 c = get_symbol_end ();
1249 /* just after name is now '\0' */
1250 p = input_line_pointer;
1253 if (*input_line_pointer != ',')
1255 as_bad ("Expected comma after symbol-name: rest of line ignored.");
1257 mri_comment_end (stop, stopc);
1258 ignore_rest_of_line ();
1261 input_line_pointer++; /* skip ',' */
1262 if ((temp = get_absolute_expression ()) < 0)
1264 as_warn (".COMMon length (%ld.) <0! Ignored.", (long) temp);
1266 mri_comment_end (stop, stopc);
1267 ignore_rest_of_line ();
1271 symbolP = symbol_find_or_make (name);
1273 if (S_IS_DEFINED (symbolP))
1275 as_bad ("Ignoring attempt to re-define symbol `%s'.",
1276 S_GET_NAME (symbolP));
1278 mri_comment_end (stop, stopc);
1279 ignore_rest_of_line ();
1282 if (S_GET_VALUE (symbolP))
1284 if (S_GET_VALUE (symbolP) != (valueT) temp)
1285 as_bad ("Length of .comm \"%s\" is already %ld. Not changed to %ld.",
1286 S_GET_NAME (symbolP),
1287 (long) S_GET_VALUE (symbolP),
1292 S_SET_VALUE (symbolP, (valueT) temp);
1293 S_SET_EXTERNAL (symbolP);
1297 extern int flag_one;
1298 if ( (!temp) || !flag_one)
1299 S_GET_OTHER(symbolP) = const_flag;
1301 #endif /* not OBJ_VMS */
1302 know (symbolP->sy_frag == &zero_address_frag);
1305 mri_comment_end (stop, stopc);
1307 demand_empty_rest_of_line ();
1310 /* The MRI COMMON pseudo-op. We handle this by creating a common
1311 symbol with the appropriate name. We make s_space do the right
1312 thing by increasing the size. */
1315 s_mri_common (small)
1332 stop = mri_comment_field (&stopc);
1336 name = input_line_pointer;
1337 if (! isdigit ((unsigned char) *name))
1338 c = get_symbol_end ();
1343 ++input_line_pointer;
1345 while (isdigit ((unsigned char) *input_line_pointer));
1346 c = *input_line_pointer;
1347 *input_line_pointer = '\0';
1349 if (line_label != NULL)
1351 alc = (char *) xmalloc (strlen (S_GET_NAME (line_label))
1352 + (input_line_pointer - name)
1354 sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
1359 sym = symbol_find_or_make (name);
1360 *input_line_pointer = c;
1364 if (*input_line_pointer != ',')
1368 ++input_line_pointer;
1369 align = get_absolute_expression ();
1372 if (S_IS_DEFINED (sym))
1374 #if defined (S_IS_COMMON) || defined (BFD_ASSEMBLER)
1375 if (! S_IS_COMMON (sym))
1378 as_bad ("attempt to re-define symbol `%s'", S_GET_NAME (sym));
1379 mri_comment_end (stop, stopc);
1380 ignore_rest_of_line ();
1385 S_SET_EXTERNAL (sym);
1386 mri_common_symbol = sym;
1390 S_SET_ALIGN (sym, align);
1393 if (line_label != NULL)
1395 line_label->sy_value.X_op = O_symbol;
1396 line_label->sy_value.X_add_symbol = sym;
1397 line_label->sy_value.X_add_number = S_GET_VALUE (sym);
1398 line_label->sy_frag = &zero_address_frag;
1399 S_SET_SEGMENT (line_label, expr_section);
1402 /* FIXME: We just ignore the small argument, which distinguishes
1403 COMMON and COMMON.S. I don't know what we can do about it. */
1405 /* Ignore the type and hptype. */
1406 if (*input_line_pointer == ',')
1407 input_line_pointer += 2;
1408 if (*input_line_pointer == ',')
1409 input_line_pointer += 2;
1411 mri_comment_end (stop, stopc);
1413 demand_empty_rest_of_line ();
1423 temp = get_absolute_expression ();
1424 if (flag_readonly_data_in_text)
1426 section = text_section;
1430 section = data_section;
1432 subseg_set (section, (subsegT) temp);
1437 demand_empty_rest_of_line ();
1440 /* Handle the .appfile pseudo-op. This is automatically generated by
1441 do_scrub_chars when a preprocessor # line comment is seen with a
1442 file name. This default definition may be overridden by the object
1443 or CPU specific pseudo-ops. This function is also the default
1444 definition for .file; the APPFILE argument is 1 for .appfile, 0 for
1448 s_app_file (appfile)
1454 /* Some assemblers tolerate immediately following '"' */
1455 if ((s = demand_copy_string (&length)) != 0)
1457 /* If this is a fake .appfile, a fake newline was inserted into
1458 the buffer. Passing -2 to new_logical_line tells it to
1460 new_logical_line (s, appfile ? -2 : -1);
1462 /* In MRI mode, the preprocessor may have inserted an extraneous
1465 && *input_line_pointer == '\''
1466 && is_end_of_line[(unsigned char) input_line_pointer[1]])
1467 ++input_line_pointer;
1469 demand_empty_rest_of_line ();
1472 listing_source_file (s);
1480 /* Handle the .appline pseudo-op. This is automatically generated by
1481 do_scrub_chars when a preprocessor # line comment is seen. This
1482 default definition may be overridden by the object or CPU specific
1491 /* The given number is that of the next line. */
1492 l = get_absolute_expression () - 1;
1494 /* Some of the back ends can't deal with non-positive line numbers.
1495 Besides, it's silly. */
1496 as_warn ("Line numbers must be positive; line number %d rejected.", l+1);
1499 new_logical_line ((char *) NULL, l);
1502 listing_source_line (l);
1505 demand_empty_rest_of_line ();
1508 /* Handle the .end pseudo-op. Actually, the real work is done in
1509 read_a_source_file. */
1517 /* The MRI assembler permits the start symbol to follow .end,
1518 but we don't support that. */
1520 if (! is_end_of_line[(unsigned char) *input_line_pointer]
1521 && *input_line_pointer != '*'
1522 && *input_line_pointer != '!')
1523 as_warn ("start address not supported");
1527 /* Handle the .err pseudo-op. */
1533 as_bad (".err encountered");
1534 demand_empty_rest_of_line ();
1537 /* Handle the MRI fail pseudo-op. */
1548 stop = mri_comment_field (&stopc);
1550 temp = get_absolute_expression ();
1552 as_warn (".fail %ld encountered", (long) temp);
1554 as_bad (".fail %ld encountered", (long) temp);
1557 mri_comment_end (stop, stopc);
1559 demand_empty_rest_of_line ();
1566 long temp_repeat = 0;
1568 register long temp_fill = 0;
1571 #ifdef md_flush_pending_output
1572 md_flush_pending_output ();
1575 temp_repeat = get_absolute_expression ();
1576 if (*input_line_pointer == ',')
1578 input_line_pointer++;
1579 temp_size = get_absolute_expression ();
1580 if (*input_line_pointer == ',')
1582 input_line_pointer++;
1583 temp_fill = get_absolute_expression ();
1586 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1587 #define BSD_FILL_SIZE_CROCK_8 (8)
1588 if (temp_size > BSD_FILL_SIZE_CROCK_8)
1590 as_warn (".fill size clamped to %d.", BSD_FILL_SIZE_CROCK_8);
1591 temp_size = BSD_FILL_SIZE_CROCK_8;
1595 as_warn ("Size negative: .fill ignored.");
1598 else if (temp_repeat <= 0)
1600 if (temp_repeat < 0)
1601 as_warn ("Repeat < 0, .fill ignored");
1605 if (temp_size && !need_pass_2)
1607 p = frag_var (rs_fill, (int) temp_size, (int) temp_size, (relax_substateT) 0, (symbolS *) 0, temp_repeat, (char *) 0);
1608 memset (p, 0, (unsigned int) temp_size);
1609 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1610 * flavoured AS. The following bizzare behaviour is to be
1611 * compatible with above. I guess they tried to take up to 8
1612 * bytes from a 4-byte expression and they forgot to sign
1613 * extend. Un*x Sux. */
1614 #define BSD_FILL_SIZE_CROCK_4 (4)
1615 md_number_to_chars (p, (valueT) temp_fill,
1616 (temp_size > BSD_FILL_SIZE_CROCK_4
1617 ? BSD_FILL_SIZE_CROCK_4
1618 : (int) temp_size));
1619 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1620 * but emits no error message because it seems a legal thing to do.
1621 * It is a degenerate case of .fill but could be emitted by a compiler.
1624 demand_empty_rest_of_line ();
1638 stop = mri_comment_field (&stopc);
1642 name = input_line_pointer;
1643 c = get_symbol_end ();
1644 symbolP = symbol_find_or_make (name);
1645 *input_line_pointer = c;
1647 S_SET_EXTERNAL (symbolP);
1650 input_line_pointer++;
1652 if (*input_line_pointer == '\n')
1659 mri_comment_end (stop, stopc);
1661 demand_empty_rest_of_line ();
1664 /* Handle the MRI IRP and IRPC pseudo-ops. */
1676 as_where (&file, &line);
1679 while (! is_end_of_line[(unsigned char) *input_line_pointer])
1680 sb_add_char (&s, *input_line_pointer++);
1684 err = expand_irp (irpc, 0, &s, &out, get_line_sb, '\0');
1686 as_bad_where (file, line, "%s", err);
1690 input_scrub_include_sb (&out, input_line_pointer);
1692 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
1695 /* Handle the .linkonce pseudo-op. This tells the assembler to mark
1696 the section to only be linked once. However, this is not supported
1697 by most object file formats. This takes an optional argument,
1698 which is what to do about duplicates. */
1704 enum linkonce_type type;
1708 type = LINKONCE_DISCARD;
1710 if (! is_end_of_line[(unsigned char) *input_line_pointer])
1715 s = input_line_pointer;
1716 c = get_symbol_end ();
1717 if (strcasecmp (s, "discard") == 0)
1718 type = LINKONCE_DISCARD;
1719 else if (strcasecmp (s, "one_only") == 0)
1720 type = LINKONCE_ONE_ONLY;
1721 else if (strcasecmp (s, "same_size") == 0)
1722 type = LINKONCE_SAME_SIZE;
1723 else if (strcasecmp (s, "same_contents") == 0)
1724 type = LINKONCE_SAME_CONTENTS;
1726 as_warn ("unrecognized .linkonce type `%s'", s);
1728 *input_line_pointer = c;
1731 #ifdef obj_handle_link_once
1732 obj_handle_link_once (type);
1733 #else /* ! defined (obj_handle_link_once) */
1734 #ifdef BFD_ASSEMBLER
1738 if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
1739 as_warn (".linkonce is not supported for this object file format");
1741 flags = bfd_get_section_flags (stdoutput, now_seg);
1742 flags |= SEC_LINK_ONCE;
1747 case LINKONCE_DISCARD:
1748 flags |= SEC_LINK_DUPLICATES_DISCARD;
1750 case LINKONCE_ONE_ONLY:
1751 flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
1753 case LINKONCE_SAME_SIZE:
1754 flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
1756 case LINKONCE_SAME_CONTENTS:
1757 flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
1760 if (! bfd_set_section_flags (stdoutput, now_seg, flags))
1761 as_bad ("bfd_set_section_flags: %s",
1762 bfd_errmsg (bfd_get_error ()));
1764 #else /* ! defined (BFD_ASSEMBLER) */
1765 as_warn (".linkonce is not supported for this object file format");
1766 #endif /* ! defined (BFD_ASSEMBLER) */
1767 #endif /* ! defined (obj_handle_link_once) */
1769 demand_empty_rest_of_line ();
1773 s_lcomm (needs_align)
1774 /* 1 if this was a ".bss" directive, which may require a 3rd argument
1775 (alignment); 0 if it was an ".lcomm" (2 args only) */
1778 register char *name;
1782 register symbolS *symbolP;
1783 segT current_seg = now_seg;
1784 subsegT current_subseg = now_subseg;
1785 const int max_alignment = 15;
1787 segT bss_seg = bss_section;
1789 name = input_line_pointer;
1790 c = get_symbol_end ();
1791 p = input_line_pointer;
1795 /* Accept an optional comma after the name. The comma used to be
1796 required, but Irix 5 cc does not generate it. */
1797 if (*input_line_pointer == ',')
1799 ++input_line_pointer;
1803 if (*input_line_pointer == '\n')
1805 as_bad ("Missing size expression");
1809 if ((temp = get_absolute_expression ()) < 0)
1811 as_warn ("BSS length (%d.) <0! Ignored.", temp);
1812 ignore_rest_of_line ();
1816 #if defined (TC_MIPS) || defined (TC_ALPHA)
1817 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
1818 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
1820 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
1821 if (temp <= bfd_get_gp_size (stdoutput))
1823 bss_seg = subseg_new (".sbss", 1);
1824 seg_info (bss_seg)->bss = 1;
1825 #ifdef BFD_ASSEMBLER
1826 if (! bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC))
1827 as_warn ("error setting flags for \".sbss\": %s",
1828 bfd_errmsg (bfd_get_error ()));
1835 /* FIXME. This needs to be machine independent. */
1846 /* FIXME: This needs to be done in a more general fashion. */
1850 record_alignment(bss_seg, align);
1857 if (*input_line_pointer != ',')
1859 as_bad ("Expected comma after size");
1860 ignore_rest_of_line ();
1863 input_line_pointer++;
1865 if (*input_line_pointer == '\n')
1867 as_bad ("Missing alignment");
1870 align = get_absolute_expression ();
1871 if (align > max_alignment)
1873 align = max_alignment;
1874 as_warn ("Alignment too large: %d. assumed.", align);
1879 as_warn ("Alignment negative. 0 assumed.");
1881 record_alignment (bss_seg, align);
1882 } /* if needs align */
1885 /* Assume some objects may require alignment on some systems. */
1886 #if defined (TC_ALPHA) && ! defined (VMS)
1889 align = ffs (temp) - 1;
1890 if (temp % (1 << align))
1897 symbolP = symbol_find_or_make (name);
1901 #if defined(OBJ_AOUT) | defined(OBJ_BOUT)
1902 S_GET_OTHER (symbolP) == 0 &&
1903 S_GET_DESC (symbolP) == 0 &&
1904 #endif /* OBJ_AOUT or OBJ_BOUT */
1905 (S_GET_SEGMENT (symbolP) == bss_seg
1906 || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0)))
1910 subseg_set (bss_seg, 1);
1913 frag_align (align, 0);
1914 /* detach from old frag */
1915 if (S_GET_SEGMENT (symbolP) == bss_seg)
1916 symbolP->sy_frag->fr_symbol = NULL;
1918 symbolP->sy_frag = frag_now;
1919 pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP,
1923 S_SET_SEGMENT (symbolP, bss_seg);
1926 /* The symbol may already have been created with a preceding
1927 ".globl" directive -- be careful not to step on storage class
1928 in that case. Otherwise, set it to static. */
1929 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
1931 S_SET_STORAGE_CLASS (symbolP, C_STAT);
1933 #endif /* OBJ_COFF */
1936 S_SET_SIZE (symbolP, temp);
1940 as_bad ("Ignoring attempt to re-define symbol `%s'.",
1941 S_GET_NAME (symbolP));
1943 subseg_set (current_seg, current_subseg);
1945 demand_empty_rest_of_line ();
1952 register char *name;
1956 register symbolS *symbolP;
1958 /* we permit ANY defined expression: BSD4.2 demands constants */
1959 name = input_line_pointer;
1960 c = get_symbol_end ();
1961 p = input_line_pointer;
1964 if (*input_line_pointer != ',')
1967 as_bad ("Expected comma after name \"%s\"", name);
1969 ignore_rest_of_line ();
1972 input_line_pointer++;
1974 if (exp.X_op != O_constant
1975 && exp.X_op != O_register)
1977 as_bad ("bad expression");
1978 ignore_rest_of_line ();
1982 symbolP = symbol_find_or_make (name);
1984 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
1985 symbolP->sy_desc == 0) out of this test because coff doesn't have
1986 those fields, and I can't see when they'd ever be tripped. I
1987 don't think I understand why they were here so I may have
1988 introduced a bug. As recently as 1.37 didn't have this test
1989 anyway. xoxorich. */
1991 if (S_GET_SEGMENT (symbolP) == undefined_section
1992 && S_GET_VALUE (symbolP) == 0)
1994 /* The name might be an undefined .global symbol; be sure to
1995 keep the "external" bit. */
1996 S_SET_SEGMENT (symbolP,
1997 (exp.X_op == O_constant
2000 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2004 as_bad ("Symbol %s already defined", name);
2007 demand_empty_rest_of_line ();
2010 /* Read a line into an sb. */
2016 if (input_line_pointer[-1] == '\n')
2017 bump_line_counters ();
2019 if (input_line_pointer >= buffer_limit)
2021 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2022 if (buffer_limit == 0)
2026 while (! is_end_of_line[(unsigned char) *input_line_pointer])
2027 sb_add_char (line, *input_line_pointer++);
2028 while (input_line_pointer < buffer_limit
2029 && is_end_of_line[(unsigned char) *input_line_pointer])
2031 if (input_line_pointer[-1] == '\n')
2032 bump_line_counters ();
2033 ++input_line_pointer;
2038 /* Define a macro. This is an interface to macro.c, which is shared
2039 between gas and gasp. */
2052 as_where (&file, &line);
2055 while (! is_end_of_line[(unsigned char) *input_line_pointer])
2056 sb_add_char (&s, *input_line_pointer++);
2059 if (line_label != NULL)
2060 sb_add_string (&label, S_GET_NAME (line_label));
2062 err = define_macro (0, &s, &label, get_line_sb, &name);
2064 as_bad_where (file, line, "%s", err);
2067 if (line_label != NULL)
2069 S_SET_SEGMENT (line_label, undefined_section);
2070 S_SET_VALUE (line_label, 0);
2071 line_label->sy_frag = &zero_address_frag;
2075 #ifdef NO_PSEUDO_DOT
2079 && hash_find (po_hash, name) != NULL)
2082 && hash_find (po_hash, name + 1) != NULL))
2083 as_warn ("attempt to redefine pseudo-op `%s' ignored",
2090 /* Handle the .mexit pseudo-op, which immediately exits a macro
2097 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2100 /* Switch in and out of MRI mode. */
2108 on = get_absolute_expression ();
2109 old_flag = flag_mri;
2123 #ifdef MRI_MODE_CHANGE
2125 MRI_MODE_CHANGE (on);
2128 demand_empty_rest_of_line ();
2131 /* Handle changing the location counter. */
2134 do_org (segment, exp, fill)
2139 if (segment != now_seg && segment != absolute_section)
2140 as_bad ("invalid segment \"%s\"; segment \"%s\" assumed",
2141 segment_name (segment), segment_name (now_seg));
2143 if (now_seg == absolute_section)
2146 as_warn ("ignoring fill value in absolute section");
2147 if (exp->X_op != O_constant)
2149 as_bad ("only constant offsets supported in absolute section");
2150 exp->X_add_number = 0;
2152 abs_section_offset = exp->X_add_number;
2158 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp->X_add_symbol,
2159 exp->X_add_number, (char *) NULL);
2168 register segT segment;
2170 register long temp_fill;
2172 /* The m68k MRI assembler has a different meaning for .org. It
2173 means to create an absolute section at a given address. We can't
2174 support that--use a linker script instead. */
2177 as_bad ("MRI style ORG pseudo-op not supported");
2178 ignore_rest_of_line ();
2182 /* Don't believe the documentation of BSD 4.2 AS. There is no such
2183 thing as a sub-segment-relative origin. Any absolute origin is
2184 given a warning, then assumed to be segment-relative. Any
2185 segmented origin expression ("foo+42") had better be in the right
2186 segment or the .org is ignored.
2188 BSD 4.2 AS warns if you try to .org backwards. We cannot because
2189 we never know sub-segment sizes when we are reading code. BSD
2190 will crash trying to emit negative numbers of filler bytes in
2191 certain .orgs. We don't crash, but see as-write for that code.
2193 Don't make frag if need_pass_2==1. */
2194 segment = get_known_segmented_expression (&exp);
2195 if (*input_line_pointer == ',')
2197 input_line_pointer++;
2198 temp_fill = get_absolute_expression ();
2204 do_org (segment, &exp, temp_fill);
2206 demand_empty_rest_of_line ();
2209 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
2210 called by the obj-format routine which handles section changing
2211 when in MRI mode. It will create a new section, and return it. It
2212 will set *TYPE to the section type: one of 'C' (code), 'D' (data),
2213 'M' (mixed), or 'R' (romable). If BFD_ASSEMBLER is defined, the
2214 flags will be set in the section. */
2228 name = input_line_pointer;
2229 if (! isdigit ((unsigned char) *name))
2230 c = get_symbol_end ();
2235 ++input_line_pointer;
2237 while (isdigit ((unsigned char) *input_line_pointer));
2238 c = *input_line_pointer;
2239 *input_line_pointer = '\0';
2242 name = xstrdup (name);
2244 *input_line_pointer = c;
2246 seg = subseg_new (name, 0);
2248 if (*input_line_pointer == ',')
2252 ++input_line_pointer;
2253 align = get_absolute_expression ();
2254 record_alignment (seg, align);
2258 if (*input_line_pointer == ',')
2260 c = *++input_line_pointer;
2261 c = toupper ((unsigned char) c);
2262 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
2265 as_bad ("unrecognized section type");
2266 ++input_line_pointer;
2268 #ifdef BFD_ASSEMBLER
2272 flags = SEC_NO_FLAGS;
2274 flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
2275 else if (*type == 'D' || *type == 'M')
2276 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
2277 else if (*type == 'R')
2278 flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
2279 if (flags != SEC_NO_FLAGS)
2281 if (! bfd_set_section_flags (stdoutput, seg, flags))
2282 as_warn ("error setting flags for \"%s\": %s",
2283 bfd_section_name (stdoutput, seg),
2284 bfd_errmsg (bfd_get_error ()));
2290 /* Ignore the HP type. */
2291 if (*input_line_pointer == ',')
2292 input_line_pointer += 2;
2294 demand_empty_rest_of_line ();
2296 #else /* ! TC_M68K */
2305 name = input_line_pointer;
2306 c = get_symbol_end ();
2308 name = xstrdup (name);
2310 *input_line_pointer = c;
2312 seg = subseg_new (name, 0);
2314 if (*input_line_pointer != ',')
2320 ++input_line_pointer;
2322 sectype = input_line_pointer;
2323 c = get_symbol_end ();
2324 if (*sectype == '\0')
2326 else if (strcasecmp (sectype, "text") == 0)
2328 else if (strcasecmp (sectype, "data") == 0)
2330 else if (strcasecmp (sectype, "romdata") == 0)
2333 as_warn ("unrecognized section type `%s'", sectype);
2334 *input_line_pointer = c;
2337 if (*input_line_pointer == ',')
2341 ++input_line_pointer;
2343 seccmd = input_line_pointer;
2344 c = get_symbol_end ();
2345 if (strcasecmp (seccmd, "absolute") == 0)
2347 as_bad ("absolute sections are not supported");
2348 *input_line_pointer = c;
2349 ignore_rest_of_line ();
2352 else if (strcasecmp (seccmd, "align") == 0)
2356 *input_line_pointer = c;
2357 align = get_absolute_expression ();
2358 record_alignment (seg, align);
2362 as_warn ("unrecognized section command `%s'", seccmd);
2363 *input_line_pointer = c;
2367 demand_empty_rest_of_line ();
2369 #else /* ! TC_I960 */
2370 /* The MRI assembler seems to use different forms of .sect for
2371 different targets. */
2373 #endif /* ! TC_I960 */
2374 #endif /* ! TC_M68K */
2377 /* Handle the .print pseudo-op. */
2386 s = demand_copy_C_string (&len);
2388 demand_empty_rest_of_line ();
2391 /* Handle the .purgem pseudo-op. */
2397 if (is_it_end_of_statement ())
2399 demand_empty_rest_of_line ();
2409 name = input_line_pointer;
2410 c = get_symbol_end ();
2411 delete_macro (name);
2412 *input_line_pointer = c;
2415 while (*input_line_pointer++ == ',');
2417 --input_line_pointer;
2418 demand_empty_rest_of_line ();
2421 /* Handle the .rept pseudo-op. */
2431 count = get_absolute_expression ();
2434 if (! buffer_and_nest ("REPT", "ENDR", &one, get_line_sb))
2436 as_bad ("rept without endr");
2442 sb_add_sb (&many, &one);
2446 input_scrub_include_sb (&many, input_line_pointer);
2448 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
2455 register char *name;
2456 register char delim;
2457 register char *end_name;
2458 register symbolS *symbolP;
2461 * Especial apologies for the random logic:
2462 * this just grew, and could be parsed much more simply!
2465 name = input_line_pointer;
2466 delim = get_symbol_end ();
2467 end_name = input_line_pointer;
2471 if (*input_line_pointer != ',')
2474 as_bad ("Expected comma after name \"%s\"", name);
2476 ignore_rest_of_line ();
2480 input_line_pointer++;
2483 if (name[0] == '.' && name[1] == '\0')
2485 /* Turn '. = mumble' into a .org mumble */
2486 register segT segment;
2489 segment = get_known_segmented_expression (&exp);
2492 do_org (segment, &exp, 0);
2498 if ((symbolP = symbol_find (name)) == NULL
2499 && (symbolP = md_undefined_symbol (name)) == NULL)
2501 symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag);
2503 /* "set" symbols are local unless otherwise specified. */
2504 SF_SET_LOCAL (symbolP);
2505 #endif /* OBJ_COFF */
2507 } /* make a new symbol */
2509 symbol_table_insert (symbolP);
2512 pseudo_set (symbolP);
2513 demand_empty_rest_of_line ();
2526 #ifdef md_flush_pending_output
2527 md_flush_pending_output ();
2531 stop = mri_comment_field (&stopc);
2533 /* In m68k MRI mode, we need to align to a word boundary, unless
2535 if (flag_m68k_mri && mult > 1)
2537 if (now_seg == absolute_section)
2539 abs_section_offset += abs_section_offset & 1;
2540 if (line_label != NULL)
2541 S_SET_VALUE (line_label, abs_section_offset);
2543 else if (mri_common_symbol != NULL)
2547 val = S_GET_VALUE (mri_common_symbol);
2550 S_SET_VALUE (mri_common_symbol, val + 1);
2551 if (line_label != NULL)
2553 know (line_label->sy_value.X_op == O_symbol);
2554 know (line_label->sy_value.X_add_symbol == mri_common_symbol);
2555 line_label->sy_value.X_add_number += 1;
2561 do_align (1, (char *) NULL, 0);
2562 if (line_label != NULL)
2564 line_label->sy_frag = frag_now;
2565 S_SET_VALUE (line_label, frag_now_fix ());
2573 if (*input_line_pointer == ',')
2575 ++input_line_pointer;
2580 val.X_op = O_constant;
2581 val.X_add_number = 0;
2584 if (val.X_op != O_constant
2585 || val.X_add_number < - 0x80
2586 || val.X_add_number > 0xff
2587 || (mult != 0 && mult != 1 && val.X_add_number != 0))
2589 if (exp.X_op != O_constant)
2590 as_bad ("Unsupported variable size or fill value");
2597 for (i = 0; i < exp.X_add_number; i++)
2598 emit_expr (&val, mult);
2603 if (exp.X_op == O_constant)
2607 repeat = exp.X_add_number;
2612 if (! flag_mri || repeat < 0)
2613 as_warn (".space repeat count is %s, ignored",
2614 repeat ? "negative" : "zero");
2618 /* If we are in the absolute section, just bump the offset. */
2619 if (now_seg == absolute_section)
2621 abs_section_offset += repeat;
2625 /* If we are secretly in an MRI common section, then
2626 creating space just increases the size of the common
2628 if (mri_common_symbol != NULL)
2630 S_SET_VALUE (mri_common_symbol,
2631 S_GET_VALUE (mri_common_symbol) + repeat);
2636 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
2637 repeat, (char *) 0);
2641 if (now_seg == absolute_section)
2643 as_bad ("space allocation too complex in absolute section");
2644 subseg_set (text_section, 0);
2646 if (mri_common_symbol != NULL)
2648 as_bad ("space allocation too complex in common section");
2649 mri_common_symbol = NULL;
2652 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
2653 make_expr_symbol (&exp), 0L, (char *) 0);
2657 *p = val.X_add_number;
2662 mri_comment_end (stop, stopc);
2664 demand_empty_rest_of_line ();
2667 /* This is like s_space, but the value is a floating point number with
2668 the given precision. This is for the MRI dcb.s pseudo-op and
2672 s_float_space (float_type)
2677 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
2682 stop = mri_comment_field (&stopc);
2684 count = get_absolute_expression ();
2687 if (*input_line_pointer != ',')
2689 as_bad ("missing value");
2691 mri_comment_end (stop, stopc);
2692 ignore_rest_of_line ();
2696 ++input_line_pointer;
2700 /* Skip any 0{letter} that may be present. Don't even check if the
2701 * letter is legal. */
2702 if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1]))
2703 input_line_pointer += 2;
2705 /* Accept :xxxx, where the x's are hex digits, for a floating point
2706 with the exact digits specified. */
2707 if (input_line_pointer[0] == ':')
2709 flen = hex_float (float_type, temp);
2713 mri_comment_end (stop, stopc);
2714 ignore_rest_of_line ();
2722 err = md_atof (float_type, temp, &flen);
2723 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
2727 as_bad ("Bad floating literal: %s", err);
2729 mri_comment_end (stop, stopc);
2730 ignore_rest_of_line ();
2735 while (--count >= 0)
2739 p = frag_more (flen);
2740 memcpy (p, temp, (unsigned int) flen);
2744 mri_comment_end (stop, stopc);
2746 demand_empty_rest_of_line ();
2749 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
2759 stop = mri_comment_field (&stopc);
2760 abs_section_offset = get_absolute_expression ();
2761 subseg_set (absolute_section, 0);
2763 mri_comment_end (stop, stopc);
2764 demand_empty_rest_of_line ();
2773 temp = get_absolute_expression ();
2774 subseg_set (text_section, (subsegT) temp);
2775 demand_empty_rest_of_line ();
2777 const_flag &= ~IN_DEFAULT_SECTION;
2783 demand_empty_rest_of_line ()
2786 if (is_end_of_line[(unsigned char) *input_line_pointer])
2788 input_line_pointer++;
2792 ignore_rest_of_line ();
2794 /* Return having already swallowed end-of-line. */
2795 } /* Return pointing just after end-of-line. */
2798 ignore_rest_of_line () /* For suspect lines: gives warning. */
2800 if (!is_end_of_line[(unsigned char) *input_line_pointer])
2802 if (isprint (*input_line_pointer))
2803 as_bad ("Rest of line ignored. First ignored character is `%c'.",
2804 *input_line_pointer);
2806 as_bad ("Rest of line ignored. First ignored character valued 0x%x.",
2807 *input_line_pointer);
2808 while (input_line_pointer < buffer_limit
2809 && !is_end_of_line[(unsigned char) *input_line_pointer])
2811 input_line_pointer++;
2814 input_line_pointer++; /* Return pointing just after end-of-line. */
2815 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
2821 * In: Pointer to a symbol.
2822 * Input_line_pointer->expression.
2824 * Out: Input_line_pointer->just after any whitespace after expression.
2825 * Tried to set symbol to value of expression.
2826 * Will change symbols type, value, and frag;
2829 pseudo_set (symbolP)
2833 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
2835 #endif /* OBJ_AOUT or OBJ_BOUT */
2837 know (symbolP); /* NULL pointer is logic error. */
2838 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
2839 ext = S_IS_EXTERNAL (symbolP);
2840 #endif /* OBJ_AOUT or OBJ_BOUT */
2842 (void) expression (&exp);
2844 if (exp.X_op == O_illegal)
2845 as_bad ("illegal expression; zero assumed");
2846 else if (exp.X_op == O_absent)
2847 as_bad ("missing expression; zero assumed");
2848 else if (exp.X_op == O_big)
2849 as_bad ("%s number invalid; zero assumed",
2850 exp.X_add_number > 0 ? "bignum" : "floating point");
2851 else if (exp.X_op == O_subtract
2852 && (S_GET_SEGMENT (exp.X_add_symbol)
2853 == S_GET_SEGMENT (exp.X_op_symbol))
2854 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
2855 && exp.X_add_symbol->sy_frag == exp.X_op_symbol->sy_frag)
2857 exp.X_op = O_constant;
2858 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
2859 - S_GET_VALUE (exp.X_op_symbol));
2867 exp.X_add_number = 0;
2870 S_SET_SEGMENT (symbolP, absolute_section);
2871 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
2873 S_SET_EXTERNAL (symbolP);
2875 S_CLEAR_EXTERNAL (symbolP);
2876 #endif /* OBJ_AOUT or OBJ_BOUT */
2877 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2878 symbolP->sy_frag = &zero_address_frag;
2882 S_SET_SEGMENT (symbolP, reg_section);
2883 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2884 symbolP->sy_frag = &zero_address_frag;
2888 if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section
2889 || exp.X_add_number != 0)
2890 symbolP->sy_value = exp;
2893 symbolS *s = exp.X_add_symbol;
2895 S_SET_SEGMENT (symbolP, S_GET_SEGMENT (s));
2896 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
2898 S_SET_EXTERNAL (symbolP);
2900 S_CLEAR_EXTERNAL (symbolP);
2901 #endif /* OBJ_AOUT or OBJ_BOUT */
2902 S_SET_VALUE (symbolP,
2903 exp.X_add_number + S_GET_VALUE (s));
2904 symbolP->sy_frag = s->sy_frag;
2905 copy_symbol_attributes (symbolP, s);
2910 /* The value is some complex expression.
2911 FIXME: Should we set the segment to anything? */
2912 symbolP->sy_value = exp;
2920 * CONStruct more frag of .bytes, or .words etc.
2921 * Should need_pass_2 be 1 then emit no frag(s).
2922 * This understands EXPRESSIONS.
2926 * This has a split personality. We use expression() to read the
2927 * value. We can detect if the value won't fit in a byte or word.
2928 * But we can't detect if expression() discarded significant digits
2929 * in the case of a long. Not worth the crocks required to fix it.
2932 /* Select a parser for cons expressions. */
2934 /* Some targets need to parse the expression in various fancy ways.
2935 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
2936 (for example, the HPPA does this). Otherwise, you can define
2937 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
2938 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
2939 are defined, which is the normal case, then only simple expressions
2943 parse_mri_cons PARAMS ((expressionS *exp, unsigned int nbytes));
2945 #ifndef TC_PARSE_CONS_EXPRESSION
2946 #ifdef BITFIELD_CONS_EXPRESSIONS
2947 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
2949 parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes));
2951 #ifdef REPEAT_CONS_EXPRESSIONS
2952 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
2954 parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes));
2957 /* If we haven't gotten one yet, just call expression. */
2958 #ifndef TC_PARSE_CONS_EXPRESSION
2959 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
2963 /* worker to do .byte etc statements */
2964 /* clobbers input_line_pointer, checks */
2967 cons_worker (nbytes, rva)
2968 register int nbytes; /* 1=.byte, 2=.word, 4=.long */
2976 #ifdef md_flush_pending_output
2977 md_flush_pending_output ();
2981 stop = mri_comment_field (&stopc);
2983 if (is_it_end_of_statement ())
2986 mri_comment_end (stop, stopc);
2987 demand_empty_rest_of_line ();
2991 #ifdef md_cons_align
2992 md_cons_align (nbytes);
2999 parse_mri_cons (&exp, (unsigned int) nbytes);
3001 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
3005 if (exp.X_op == O_symbol)
3006 exp.X_op = O_symbol_rva;
3008 as_fatal ("rva without symbol");
3010 emit_expr (&exp, (unsigned int) nbytes);
3013 while (*input_line_pointer++ == ',');
3015 /* In MRI mode, after an odd number of bytes, we must align to an
3016 even word boundary, unless the next instruction is a dc.b, ds.b
3018 if (flag_mri && nbytes == 1 && (c & 1) != 0)
3019 mri_pending_align = 1;
3021 input_line_pointer--; /* Put terminator back into stream. */
3024 mri_comment_end (stop, stopc);
3026 demand_empty_rest_of_line ();
3034 cons_worker (size, 0);
3041 cons_worker (size, 1);
3045 /* Put the contents of expression EXP into the object file using
3046 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
3049 emit_expr (exp, nbytes)
3051 unsigned int nbytes;
3055 valueT extra_digit = 0;
3057 /* Don't do anything if we are going to make another pass. */
3063 /* Allow `.word 0' in the absolute section. */
3064 if (now_seg == absolute_section)
3066 if (op != O_constant || exp->X_add_number != 0)
3067 as_bad ("attempt to store value in absolute section");
3068 abs_section_offset += nbytes;
3072 /* Handle a negative bignum. */
3074 && exp->X_add_number == 0
3075 && exp->X_add_symbol->sy_value.X_op == O_big
3076 && exp->X_add_symbol->sy_value.X_add_number > 0)
3079 unsigned long carry;
3081 exp = &exp->X_add_symbol->sy_value;
3083 /* Negate the bignum: one's complement each digit and add 1. */
3085 for (i = 0; i < exp->X_add_number; i++)
3089 next = (((~ (generic_bignum[i] & LITTLENUM_MASK))
3092 generic_bignum[i] = next & LITTLENUM_MASK;
3093 carry = next >> LITTLENUM_NUMBER_OF_BITS;
3096 /* We can ignore any carry out, because it will be handled by
3097 extra_digit if it is needed. */
3099 extra_digit = (valueT) -1;
3103 if (op == O_absent || op == O_illegal)
3105 as_warn ("zero assumed for missing expression");
3106 exp->X_add_number = 0;
3109 else if (op == O_big && exp->X_add_number <= 0)
3111 as_bad ("floating point number invalid; zero assumed");
3112 exp->X_add_number = 0;
3115 else if (op == O_register)
3117 as_warn ("register value used as expression");
3121 p = frag_more ((int) nbytes);
3123 #ifndef WORKING_DOT_WORD
3124 /* If we have the difference of two symbols in a word, save it on
3125 the broken_words list. See the code in write.c. */
3126 if (op == O_subtract && nbytes == 2)
3128 struct broken_word *x;
3130 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
3131 x->next_broken_word = broken_words;
3134 x->word_goes_here = p;
3136 x->add = exp->X_add_symbol;
3137 x->sub = exp->X_op_symbol;
3138 x->addnum = exp->X_add_number;
3145 /* If we have an integer, but the number of bytes is too large to
3146 pass to md_number_to_chars, handle it as a bignum. */
3147 if (op == O_constant && nbytes > sizeof (valueT))
3152 if (! exp->X_unsigned && exp->X_add_number < 0)
3153 extra_digit = (valueT) -1;
3154 val = (valueT) exp->X_add_number;
3158 generic_bignum[gencnt] = val & LITTLENUM_MASK;
3159 val >>= LITTLENUM_NUMBER_OF_BITS;
3163 op = exp->X_op = O_big;
3164 exp->X_add_number = gencnt;
3167 if (op == O_constant)
3169 register valueT get;
3170 register valueT use;
3171 register valueT mask;
3172 register valueT unmask;
3174 /* JF << of >= number of bits in the object is undefined. In
3175 particular SPARC (Sun 4) has problems */
3176 if (nbytes >= sizeof (valueT))
3179 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes); /* Don't store these bits. */
3181 unmask = ~mask; /* Do store these bits. */
3184 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
3185 mask = ~(unmask >> 1); /* Includes sign bit now. */
3188 get = exp->X_add_number;
3190 if ((get & mask) != 0 && (get & mask) != mask)
3191 { /* Leading bits contain both 0s & 1s. */
3192 as_warn ("Value 0x%lx truncated to 0x%lx.",
3193 (unsigned long) get, (unsigned long) use);
3195 /* put bytes in right order. */
3196 md_number_to_chars (p, use, (int) nbytes);
3198 else if (op == O_big)
3201 LITTLENUM_TYPE *nums;
3203 know (nbytes % CHARS_PER_LITTLENUM == 0);
3205 size = exp->X_add_number * CHARS_PER_LITTLENUM;
3208 as_warn ("Bignum truncated to %d bytes", nbytes);
3212 if (target_big_endian)
3214 while (nbytes > size)
3216 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3217 nbytes -= CHARS_PER_LITTLENUM;
3218 p += CHARS_PER_LITTLENUM;
3221 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
3225 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3226 size -= CHARS_PER_LITTLENUM;
3227 p += CHARS_PER_LITTLENUM;
3232 nums = generic_bignum;
3235 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
3237 size -= CHARS_PER_LITTLENUM;
3238 p += CHARS_PER_LITTLENUM;
3239 nbytes -= CHARS_PER_LITTLENUM;
3244 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
3245 nbytes -= CHARS_PER_LITTLENUM;
3246 p += CHARS_PER_LITTLENUM;
3252 memset (p, 0, nbytes);
3254 /* Now we need to generate a fixS to record the symbol value.
3255 This is easy for BFD. For other targets it can be more
3256 complex. For very complex cases (currently, the HPPA and
3257 NS32K), you can define TC_CONS_FIX_NEW to do whatever you
3258 want. For simpler cases, you can define TC_CONS_RELOC to be
3259 the name of the reloc code that should be stored in the fixS.
3260 If neither is defined, the code uses NO_RELOC if it is
3261 defined, and otherwise uses 0. */
3263 #ifdef BFD_ASSEMBLER
3264 #ifdef TC_CONS_FIX_NEW
3265 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
3268 bfd_reloc_code_real_type r;
3285 as_bad ("unsupported BFD relocation size %u", nbytes);
3289 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp,
3294 #ifdef TC_CONS_FIX_NEW
3295 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
3297 /* Figure out which reloc number to use. Use TC_CONS_RELOC if
3298 it is defined, otherwise use NO_RELOC if it is defined,
3300 #ifndef TC_CONS_RELOC
3302 #define TC_CONS_RELOC NO_RELOC
3304 #define TC_CONS_RELOC 0
3307 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0,
3309 #endif /* TC_CONS_FIX_NEW */
3310 #endif /* BFD_ASSEMBLER */
3314 #ifdef BITFIELD_CONS_EXPRESSIONS
3316 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
3317 w:x,y:z, where w and y are bitwidths and x and y are values. They
3318 then pack them all together. We do a little better in that we allow
3319 them in words, longs, etc. and we'll pack them in target byte order
3322 The rules are: pack least significat bit first, if a field doesn't
3323 entirely fit, put it in the next unit. Overflowing the bitfield is
3324 explicitly *not* even a warning. The bitwidth should be considered
3327 To use this function the tc-XXX.h file should define
3328 BITFIELD_CONS_EXPRESSIONS. */
3331 parse_bitfield_cons (exp, nbytes)
3333 unsigned int nbytes;
3335 unsigned int bits_available = BITS_PER_CHAR * nbytes;
3336 char *hold = input_line_pointer;
3338 (void) expression (exp);
3340 if (*input_line_pointer == ':')
3346 unsigned long width;
3348 if (*input_line_pointer != ':')
3350 input_line_pointer = hold;
3352 } /* next piece is not a bitfield */
3354 /* In the general case, we can't allow
3355 full expressions with symbol
3356 differences and such. The relocation
3357 entries for symbols not defined in this
3358 assembly would require arbitrary field
3359 widths, positions, and masks which most
3360 of our current object formats don't
3363 In the specific case where a symbol
3364 *is* defined in this assembly, we
3365 *could* build fixups and track it, but
3366 this could lead to confusion for the
3367 backends. I'm lazy. I'll take any
3368 SEG_ABSOLUTE. I think that means that
3369 you can use a previous .set or
3370 .equ type symbol. xoxorich. */
3372 if (exp->X_op == O_absent)
3374 as_warn ("using a bit field width of zero");
3375 exp->X_add_number = 0;
3376 exp->X_op = O_constant;
3377 } /* implied zero width bitfield */
3379 if (exp->X_op != O_constant)
3381 *input_line_pointer = '\0';
3382 as_bad ("field width \"%s\" too complex for a bitfield", hold);
3383 *input_line_pointer = ':';
3384 demand_empty_rest_of_line ();
3388 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
3390 as_warn ("field width %lu too big to fit in %d bytes: truncated to %d bits",
3391 width, nbytes, (BITS_PER_CHAR * nbytes));
3392 width = BITS_PER_CHAR * nbytes;
3395 if (width > bits_available)
3397 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
3398 input_line_pointer = hold;
3399 exp->X_add_number = value;
3403 hold = ++input_line_pointer; /* skip ':' */
3405 (void) expression (exp);
3406 if (exp->X_op != O_constant)
3408 char cache = *input_line_pointer;
3410 *input_line_pointer = '\0';
3411 as_bad ("field value \"%s\" too complex for a bitfield", hold);
3412 *input_line_pointer = cache;
3413 demand_empty_rest_of_line ();
3417 value |= ((~(-1 << width) & exp->X_add_number)
3418 << ((BITS_PER_CHAR * nbytes) - bits_available));
3420 if ((bits_available -= width) == 0
3421 || is_it_end_of_statement ()
3422 || *input_line_pointer != ',')
3425 } /* all the bitfields we're gonna get */
3427 hold = ++input_line_pointer;
3428 (void) expression (exp);
3429 } /* forever loop */
3431 exp->X_add_number = value;
3432 exp->X_op = O_constant;
3433 exp->X_unsigned = 1;
3434 } /* if looks like a bitfield */
3435 } /* parse_bitfield_cons() */
3437 #endif /* BITFIELD_CONS_EXPRESSIONS */
3439 /* Handle an MRI style string expression. */
3442 parse_mri_cons (exp, nbytes)
3444 unsigned int nbytes;
3446 if (*input_line_pointer != '\''
3447 && (input_line_pointer[1] != '\''
3448 || (*input_line_pointer != 'A'
3449 && *input_line_pointer != 'E')))
3450 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
3454 unsigned int result = 0;
3456 /* An MRI style string. Cut into as many bytes as will fit into
3457 a nbyte chunk, left justify if necessary, and separate with
3458 commas so we can try again later. */
3459 if (*input_line_pointer == 'A')
3460 ++input_line_pointer;
3461 else if (*input_line_pointer == 'E')
3463 as_bad ("EBCDIC constants are not supported");
3464 ++input_line_pointer;
3467 input_line_pointer++;
3468 for (scan = 0; scan < nbytes; scan++)
3470 if (*input_line_pointer == '\'')
3472 if (input_line_pointer[1] == '\'')
3474 input_line_pointer++;
3479 result = (result << 8) | (*input_line_pointer++);
3483 while (scan < nbytes)
3488 /* Create correct expression */
3489 exp->X_op = O_constant;
3490 exp->X_add_number = result;
3491 /* Fake it so that we can read the next char too */
3492 if (input_line_pointer[0] != '\'' ||
3493 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
3495 input_line_pointer -= 2;
3496 input_line_pointer[0] = ',';
3497 input_line_pointer[1] = '\'';
3500 input_line_pointer++;
3504 #ifdef REPEAT_CONS_EXPRESSIONS
3506 /* Parse a repeat expression for cons. This is used by the MIPS
3507 assembler. The format is NUMBER:COUNT; NUMBER appears in the
3508 object file COUNT times.
3510 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
3513 parse_repeat_cons (exp, nbytes)
3515 unsigned int nbytes;
3522 if (*input_line_pointer != ':')
3524 /* No repeat count. */
3528 ++input_line_pointer;
3529 expression (&count);
3530 if (count.X_op != O_constant
3531 || count.X_add_number <= 0)
3533 as_warn ("Unresolvable or nonpositive repeat count; using 1");
3537 /* The cons function is going to output this expression once. So we
3538 output it count - 1 times. */
3539 for (i = count.X_add_number - 1; i > 0; i--)
3540 emit_expr (exp, nbytes);
3543 #endif /* REPEAT_CONS_EXPRESSIONS */
3545 /* Parse a floating point number represented as a hex constant. This
3546 permits users to specify the exact bits they want in the floating
3550 hex_float (float_type, bytes)
3584 as_bad ("Unknown floating type type '%c'", float_type);
3588 /* It would be nice if we could go through expression to parse the
3589 hex constant, but if we get a bignum it's a pain to sort it into
3590 the buffer correctly. */
3592 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
3596 /* The MRI assembler accepts arbitrary underscores strewn about
3597 through the hex constant, so we ignore them as well. */
3598 if (*input_line_pointer == '_')
3600 ++input_line_pointer;
3606 as_warn ("Floating point constant too large");
3609 d = hex_value (*input_line_pointer) << 4;
3610 ++input_line_pointer;
3611 while (*input_line_pointer == '_')
3612 ++input_line_pointer;
3613 if (hex_p (*input_line_pointer))
3615 d += hex_value (*input_line_pointer);
3616 ++input_line_pointer;
3618 if (target_big_endian)
3621 bytes[length - i - 1] = d;
3627 if (target_big_endian)
3628 memset (bytes + i, 0, length - i);
3630 memset (bytes, 0, length - i);
3639 * CONStruct some more frag chars of .floats .ffloats etc.
3640 * Makes 0 or more new frags.
3641 * If need_pass_2 == 1, no frags are emitted.
3642 * This understands only floating literals, not expressions. Sorry.
3644 * A floating constant is defined by atof_generic(), except it is preceded
3645 * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
3646 * reading, I decided to be incompatible. This always tries to give you
3647 * rounded bits to the precision of the pseudo-op. Former AS did premature
3648 * truncatation, restored noisy bits instead of trailing 0s AND gave you
3649 * a choice of 2 flavours of noise according to which of 2 floating-point
3650 * scanners you directed AS to use.
3652 * In: input_line_pointer->whitespace before, or '0' of flonum.
3657 float_cons (float_type)
3658 /* Clobbers input_line-pointer, checks end-of-line. */
3659 register int float_type; /* 'f':.ffloat ... 'F':.float ... */
3662 int length; /* Number of chars in an object. */
3663 register char *err; /* Error from scanning floating literal. */
3664 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
3666 if (is_it_end_of_statement ())
3668 demand_empty_rest_of_line ();
3672 #ifdef md_flush_pending_output
3673 md_flush_pending_output ();
3678 /* input_line_pointer->1st char of a flonum (we hope!). */
3681 /* Skip any 0{letter} that may be present. Don't even check if the
3682 * letter is legal. Someone may invent a "z" format and this routine
3683 * has no use for such information. Lusers beware: you get
3684 * diagnostics if your input is ill-conditioned.
3686 if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1]))
3687 input_line_pointer += 2;
3689 /* Accept :xxxx, where the x's are hex digits, for a floating
3690 point with the exact digits specified. */
3691 if (input_line_pointer[0] == ':')
3693 ++input_line_pointer;
3694 length = hex_float (float_type, temp);
3697 ignore_rest_of_line ();
3703 err = md_atof (float_type, temp, &length);
3704 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
3708 as_bad ("Bad floating literal: %s", err);
3709 ignore_rest_of_line ();
3720 #ifdef REPEAT_CONS_EXPRESSIONS
3721 if (*input_line_pointer == ':')
3723 expressionS count_exp;
3725 ++input_line_pointer;
3726 expression (&count_exp);
3727 if (count_exp.X_op != O_constant
3728 || count_exp.X_add_number <= 0)
3730 as_warn ("unresolvable or nonpositive repeat count; using 1");
3733 count = count_exp.X_add_number;
3737 while (--count >= 0)
3739 p = frag_more (length);
3740 memcpy (p, temp, (unsigned int) length);
3745 while (*input_line_pointer++ == ',');
3747 --input_line_pointer; /* Put terminator back into stream. */
3748 demand_empty_rest_of_line ();
3749 } /* float_cons() */
3754 * We read 0 or more ',' seperated, double-quoted strings.
3756 * Caller should have checked need_pass_2 is FALSE because we don't check it.
3761 stringer (append_zero) /* Worker to do .ascii etc statements. */
3762 /* Checks end-of-line. */
3763 register int append_zero; /* 0: don't append '\0', else 1 */
3765 register unsigned int c;
3767 #ifdef md_flush_pending_output
3768 md_flush_pending_output ();
3772 * The following awkward logic is to parse ZERO or more strings,
3773 * comma seperated. Recall a string expression includes spaces
3774 * before the opening '\"' and spaces after the closing '\"'.
3775 * We fake a leading ',' if there is (supposed to be)
3776 * a 1st, expression. We keep demanding expressions for each
3779 if (is_it_end_of_statement ())
3781 c = 0; /* Skip loop. */
3782 ++input_line_pointer; /* Compensate for end of loop. */
3786 c = ','; /* Do loop. */
3788 while (c == ',' || c == '<' || c == '"')
3791 switch (*input_line_pointer)
3794 ++input_line_pointer; /*->1st char of string. */
3795 while (is_a_char (c = next_char_of_string ()))
3797 FRAG_APPEND_1_CHAR (c);
3801 FRAG_APPEND_1_CHAR (0);
3803 know (input_line_pointer[-1] == '\"');
3806 input_line_pointer++;
3807 c = get_single_number ();
3808 FRAG_APPEND_1_CHAR (c);
3809 if (*input_line_pointer != '>')
3811 as_bad ("Expected <nn>");
3813 input_line_pointer++;
3816 input_line_pointer++;
3820 c = *input_line_pointer;
3823 demand_empty_rest_of_line ();
3826 /* FIXME-SOMEDAY: I had trouble here on characters with the
3827 high bits set. We'll probably also have trouble with
3828 multibyte chars, wide chars, etc. Also be careful about
3829 returning values bigger than 1 byte. xoxorich. */
3832 next_char_of_string ()
3834 register unsigned int c;
3836 c = *input_line_pointer++ & CHAR_MASK;
3844 as_warn ("Unterminated string: Newline inserted.");
3845 bump_line_counters ();
3848 #ifndef NO_STRING_ESCAPES
3850 switch (c = *input_line_pointer++)
3878 break; /* As itself. */
3894 for (i = 0, number = 0; isdigit (c) && i < 3; c = *input_line_pointer++, i++)
3896 number = number * 8 + c - '0';
3900 --input_line_pointer;
3909 c = *input_line_pointer++;
3910 while (isxdigit (c))
3913 number = number * 16 + c - '0';
3914 else if (isupper (c))
3915 number = number * 16 + c - 'A' + 10;
3917 number = number * 16 + c - 'a' + 10;
3918 c = *input_line_pointer++;
3921 --input_line_pointer;
3926 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
3927 as_warn ("Unterminated string: Newline inserted.");
3929 bump_line_counters ();
3934 #ifdef ONLY_STANDARD_ESCAPES
3935 as_bad ("Bad escaped character in string, '?' assumed");
3937 #endif /* ONLY_STANDARD_ESCAPES */
3940 } /* switch on escaped char */
3942 #endif /* ! defined (NO_STRING_ESCAPES) */
3946 } /* switch on char */
3948 } /* next_char_of_string() */
3951 get_segmented_expression (expP)
3952 register expressionS *expP;
3954 register segT retval;
3956 retval = expression (expP);
3957 if (expP->X_op == O_illegal
3958 || expP->X_op == O_absent
3959 || expP->X_op == O_big)
3961 as_bad ("expected address expression; zero assumed");
3962 expP->X_op = O_constant;
3963 expP->X_add_number = 0;
3964 retval = absolute_section;
3970 get_known_segmented_expression (expP)
3971 register expressionS *expP;
3973 register segT retval;
3975 if ((retval = get_segmented_expression (expP)) == undefined_section)
3977 /* There is no easy way to extract the undefined symbol from the
3979 if (expP->X_add_symbol != NULL
3980 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
3981 as_warn ("symbol \"%s\" undefined; zero assumed",
3982 S_GET_NAME (expP->X_add_symbol));
3984 as_warn ("some symbol undefined; zero assumed");
3985 retval = absolute_section;
3986 expP->X_op = O_constant;
3987 expP->X_add_number = 0;
3989 know (retval == absolute_section || SEG_NORMAL (retval));
3991 } /* get_known_segmented_expression() */
3994 get_absolute_expression ()
3999 if (exp.X_op != O_constant)
4001 if (exp.X_op != O_absent)
4002 as_bad ("bad or irreducible absolute expression; zero assumed");
4003 exp.X_add_number = 0;
4005 return exp.X_add_number;
4008 char /* return terminator */
4009 get_absolute_expression_and_terminator (val_pointer)
4010 long *val_pointer; /* return value of expression */
4012 /* FIXME: val_pointer should probably be offsetT *. */
4013 *val_pointer = (long) get_absolute_expression ();
4014 return (*input_line_pointer++);
4018 * demand_copy_C_string()
4020 * Like demand_copy_string, but return NULL if the string contains any '\0's.
4021 * Give a warning if that happens.
4024 demand_copy_C_string (len_pointer)
4029 if ((s = demand_copy_string (len_pointer)) != 0)
4033 for (len = *len_pointer; len > 0; len--)
4040 as_bad ("This string may not contain \'\\0\'");
4048 * demand_copy_string()
4050 * Demand string, but return a safe (=private) copy of the string.
4051 * Return NULL if we can't read a string here.
4054 demand_copy_string (lenP)
4057 register unsigned int c;
4063 if (*input_line_pointer == '\"')
4065 input_line_pointer++; /* Skip opening quote. */
4067 while (is_a_char (c = next_char_of_string ()))
4069 obstack_1grow (¬es, c);
4072 /* JF this next line is so demand_copy_C_string will return a
4073 null terminated string. */
4074 obstack_1grow (¬es, '\0');
4075 retval = obstack_finish (¬es);
4079 as_warn ("Missing string");
4081 ignore_rest_of_line ();
4085 } /* demand_copy_string() */
4088 * is_it_end_of_statement()
4090 * In: Input_line_pointer->next character.
4092 * Do: Skip input_line_pointer over all whitespace.
4094 * Out: 1 if input_line_pointer->end-of-line.
4097 is_it_end_of_statement ()
4100 return (is_end_of_line[(unsigned char) *input_line_pointer]);
4101 } /* is_it_end_of_statement() */
4107 register symbolS *symbolP; /* symbol we are working with */
4111 input_line_pointer++;
4112 if (*input_line_pointer == '=')
4113 input_line_pointer++;
4115 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
4116 input_line_pointer++;
4119 stop = mri_comment_field (&stopc);
4121 if (sym_name[0] == '.' && sym_name[1] == '\0')
4123 /* Turn '. = mumble' into a .org mumble */
4124 register segT segment;
4127 segment = get_known_segmented_expression (&exp);
4129 do_org (segment, &exp, 0);
4133 symbolP = symbol_find_or_make (sym_name);
4134 pseudo_set (symbolP);
4138 mri_comment_end (stop, stopc);
4141 /* .include -- include a file at this point. */
4154 if (! flag_m68k_mri)
4155 filename = demand_copy_string (&i);
4160 while (! is_end_of_line[(unsigned char) *input_line_pointer]
4161 && *input_line_pointer != ' '
4162 && *input_line_pointer != '\t')
4164 obstack_1grow (¬es, *input_line_pointer);
4165 ++input_line_pointer;
4168 obstack_1grow (¬es, '\0');
4169 filename = obstack_finish (¬es);
4170 while (! is_end_of_line[(unsigned char) *input_line_pointer])
4171 ++input_line_pointer;
4173 demand_empty_rest_of_line ();
4174 path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ );
4175 for (i = 0; i < include_dir_count; i++)
4177 strcpy (path, include_dirs[i]);
4179 strcat (path, filename);
4180 if (0 != (try = fopen (path, "r")))
4189 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
4190 newbuf = input_scrub_include_file (path, input_line_pointer);
4191 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
4195 add_include_dir (path)
4200 if (include_dir_count == 0)
4202 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
4203 include_dirs[0] = "."; /* Current dir */
4204 include_dir_count = 2;
4208 include_dir_count++;
4209 include_dirs = (char **) realloc (include_dirs,
4210 include_dir_count * sizeof (*include_dirs));
4213 include_dirs[include_dir_count - 1] = path; /* New one */
4216 if (i > include_dir_maxlen)
4217 include_dir_maxlen = i;
4218 } /* add_include_dir() */
4224 while (!is_end_of_line[(unsigned char) *input_line_pointer])
4226 ++input_line_pointer;
4228 ++input_line_pointer;
4233 read_print_statistics (file)
4236 hash_print_statistics (file, "pseudo-op table", po_hash);