1 /* read.c - read a source file -
2 Copyright (C) 1986, 1987, 1990, 1991, 1993, 1994
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. */
45 #include "libiberty.h"
49 #ifndef TC_START_LABEL
50 #define TC_START_LABEL(x,y) (x==':')
53 /* The NOP_OPCODE is for the alignment fill value.
54 * fill it a nop instruction so that the disassembler does not choke
58 #define NOP_OPCODE 0x00
61 char *input_line_pointer; /*->next char of source file to parse. */
63 int generate_asm_lineno = 0; /* flag to generate line stab for .s file */
65 #if BITS_PER_CHAR != 8
66 /* The following table is indexed by[(char)] and will break if
67 a char does not have exactly 256 states (hopefully 0:255!)! */
72 /* The m88k unfortunately uses @ as a label beginner. */
77 /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
82 /* The Delta 68k assembler permits % inside label names. */
86 /* used by is_... macros. our ctype[] */
89 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
90 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
91 0, 0, 0, 0, 3, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
92 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
93 LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
94 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
95 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
96 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 0, /* pqrstuvwxyz{|}~. */
97 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
98 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
99 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
100 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
101 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
102 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
103 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
109 * Out: 1 if this character ends a line.
112 char is_end_of_line[256] =
115 _, _, _, _, _, _, _, _, _, _, 99, _, _, 99, _, _, /* @abcdefghijklmno */
117 _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, _, /* @abcdefghijklmno */
119 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
121 _,99, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* _!"#$%&'()*+,-./ */
122 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0123456789:;<=>? */
124 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
125 _, _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, /* 0123456789:;<=>? */
127 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
128 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
129 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
130 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
131 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
132 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
133 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
134 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
135 _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */
139 /* Functions private to this file. */
141 static char *buffer; /* 1st char of each buffer of lines is here. */
142 static char *buffer_limit; /*->1 + last char in buffer. */
144 #ifdef TARGET_BYTES_BIG_ENDIAN
145 /* Hack to deal with tc-*.h defining TARGET_BYTES_BIG_ENDIAN to empty
146 instead of to 0 or 1. */
147 #if 5 - TARGET_BYTES_BIG_ENDIAN - 5 == 10
148 #undef TARGET_BYTES_BIG_ENDIAN
149 #define TARGET_BYTES_BIG_ENDIAN 1
151 int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
153 int target_big_endian /* = 0 */;
156 static char *old_buffer; /* JF a hack */
157 static char *old_input;
158 static char *old_limit;
160 /* Variables for handling include file directory list. */
162 char **include_dirs; /* List of pointers to directories to
163 search for .include's */
164 int include_dir_count; /* How many are in the list */
165 int include_dir_maxlen = 1;/* Length of longest in list */
167 #ifndef WORKING_DOT_WORD
168 struct broken_word *broken_words;
169 int new_broken_words;
172 /* The current offset into the absolute section. We don't try to
173 build frags in the absolute section, since no data can be stored
174 there. We just keep track of the current offset. */
175 addressT abs_section_offset;
177 /* If this line had an MRI style label, it is stored in this variable.
178 This is used by some of the MRI pseudo-ops. */
179 symbolS *mri_line_label;
181 /* This global variable is used to support MRI common sections. We
182 translate such sections into a common symbol. This variable is
183 non-NULL when we are in an MRI common section. */
184 symbolS *mri_common_symbol;
186 /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
187 need to align to an even byte boundary unless the next pseudo-op is
188 dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
190 static int mri_pending_align;
192 static void do_align PARAMS ((int, char *));
193 static int hex_float PARAMS ((int, char *));
194 static void do_org PARAMS ((segT, expressionS *, int));
195 char *demand_copy_string PARAMS ((int *lenP));
196 int is_it_end_of_statement PARAMS ((void));
197 static segT get_segmented_expression PARAMS ((expressionS *expP));
198 static segT get_known_segmented_expression PARAMS ((expressionS * expP));
199 static void pobegin PARAMS ((void));
208 obj_read_begin_hook ();
210 /* Something close -- but not too close -- to a multiple of 1024.
211 The debugging malloc I'm using has 24 bytes of overhead. */
212 obstack_begin (¬es, 5090);
213 obstack_begin (&cond_obstack, 990);
215 /* Use machine dependent syntax */
216 for (p = line_separator_chars; *p; p++)
217 is_end_of_line[(unsigned char) *p] = 1;
218 /* Use more. FIXME-SOMEDAY. */
224 /* set up pseudo-op tables */
226 static struct hash_control *po_hash;
228 static const pseudo_typeS potable[] =
230 {"abort", s_abort, 0},
231 {"align", s_align_ptwo, 0},
232 {"ascii", stringer, 0},
233 {"asciz", stringer, 1},
234 {"balign", s_align_bytes, 0},
238 {"common", s_mri_common, 0},
239 {"common.s", s_mri_common, 1},
243 {"dc.d", float_cons, 'd'},
245 {"dc.s", float_cons, 'f'},
247 {"dc.x", float_cons, 'x'},
249 {"dcb.b", s_space, 1},
250 {"dcb.d", s_float_space, 'd'},
251 {"dcb.l", s_space, 4},
252 {"dcb.s", s_float_space, 'f'},
253 {"dcb.w", s_space, 2},
254 {"dcb.x", s_float_space, 'x'},
256 {"ds.b", s_space, 1},
257 {"ds.d", s_space, 8},
258 {"ds.l", s_space, 4},
259 {"ds.p", s_space, 12},
260 {"ds.s", s_space, 4},
261 {"ds.w", s_space, 2},
262 {"ds.x", s_space, 12},
267 {"double", float_cons, 'd'},
269 {"eject", listing_eject, 0}, /* Formfeed listing */
271 {"elsec", s_else, 0},
273 {"endc", s_endif, 0},
274 {"endif", s_endif, 0},
279 {"extern", s_ignore, 0}, /* We treat all undef as ext */
280 {"appfile", s_app_file, 1},
281 {"appline", s_app_line, 0},
283 {"file", s_app_file, 0},
285 {"float", float_cons, 'f'},
286 {"format", s_ignore, 0},
287 {"global", s_globl, 0},
288 {"globl", s_globl, 0},
290 {"if", s_if, (int) O_ne},
291 {"ifdef", s_ifdef, 0},
292 {"ifeq", s_if, (int) O_eq},
293 {"ifeqs", s_ifeqs, 0},
294 {"ifge", s_if, (int) O_ge},
295 {"ifgt", s_if, (int) O_gt},
296 {"ifle", s_if, (int) O_le},
297 {"iflt", s_if, (int) O_lt},
298 {"ifndef", s_ifdef, 1},
299 {"ifne", s_if, (int) O_ne},
300 {"ifnes", s_ifeqs, 1},
301 {"ifnotdef", s_ifdef, 1},
302 {"include", s_include, 0},
304 {"lcomm", s_lcomm, 0},
305 {"lflags", listing_flags, 0}, /* Listing flags */
306 {"list", listing_list, 1}, /* Turn listing on */
307 {"llen", listing_psize, 1},
310 {"noformat", s_ignore, 0},
311 {"nolist", listing_list, 0}, /* Turn listing off */
312 {"nopage", listing_nopage, 0},
314 {"offset", s_struct, 0},
316 {"p2align", s_align_ptwo, 0},
317 {"page", listing_eject, 0},
318 {"plen", listing_psize, 0},
319 {"psize", listing_psize, 0}, /* set paper size */
322 {"sbttl", listing_title, 1}, /* Subtitle of listing */
327 {"single", float_cons, 'f'},
329 {"space", s_space, 0},
330 {"spc", s_ignore, 0},
331 {"stabd", s_stab, 'd'},
332 {"stabn", s_stab, 'n'},
333 {"stabs", s_stab, 's'},
334 {"string", stringer, 1},
335 {"struct", s_struct, 0},
339 /* This is for gcc to use. It's only just been added (2/94), so gcc
340 won't be able to use it for a while -- probably a year or more.
341 But once this has been released, check with gcc maintainers
342 before deleting it or even changing the spelling. */
343 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
344 /* If we're folding case -- done for some targets, not necessarily
345 all -- the above string in an input file will be converted to
346 this one. Match it either way... */
347 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
349 {"title", listing_title, 0}, /* Listing title */
350 {"ttl", listing_title, 0},
355 {"xdef", s_globl, 0},
356 {"xref", s_ignore, 0},
357 {"xstabs", s_xstab, 's'},
359 {"zero", s_space, 0},
360 {NULL} /* end sentinel */
363 static int pop_override_ok = 0;
364 static const char *pop_table_name;
368 const pseudo_typeS *table;
371 const pseudo_typeS *pop;
372 for (pop = table; pop->poc_name; pop++)
374 errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
375 if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
376 as_fatal ("error constructing %s pseudo-op table", pop_table_name);
380 #ifndef md_pop_insert
381 #define md_pop_insert() pop_insert(md_pseudo_table)
384 #ifndef obj_pop_insert
385 #define obj_pop_insert() pop_insert(obj_pseudo_table)
391 po_hash = hash_new ();
393 /* Do the target-specific pseudo ops. */
394 pop_table_name = "md";
397 /* Now object specific. Skip any that were in the target table. */
398 pop_table_name = "obj";
402 /* Now portable ones. Skip any that we've seen already. */
403 pop_table_name = "standard";
404 pop_insert (potable);
407 #define HANDLE_CONDITIONAL_ASSEMBLY() \
408 if (ignore_input ()) \
410 while (! is_end_of_line[(unsigned char) *input_line_pointer++]) \
411 if (input_line_pointer == buffer_limit) \
417 /* read_a_source_file()
419 * We read the file, putting things into a web that
420 * represents what we have been reading.
423 read_a_source_file (name)
427 register char *s; /* string of symbol, '\0' appended */
431 buffer = input_scrub_new_file (name);
434 listing_newline ("");
436 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
437 { /* We have another line to parse. */
438 know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */
439 contin: /* JF this goto is my fault I admit it.
440 Someone brave please re-write the whole
441 input section here? Pleeze??? */
442 while (input_line_pointer < buffer_limit)
444 /* We have more of this buffer to parse. */
447 * We now have input_line_pointer->1st char of next line.
448 * If input_line_pointer [-1] == '\n' then we just
449 * scanned another line: so bump line counters.
451 if (is_end_of_line[(unsigned char) input_line_pointer[-1]])
453 #ifdef md_start_line_hook
454 md_start_line_hook ();
457 if (input_line_pointer[-1] == '\n')
458 bump_line_counters ();
461 #ifdef LABELS_WITHOUT_COLONS
466 mri_line_label = NULL;
468 /* Text at the start of a line must be a label, we
469 run down and stick a colon in. */
470 if (is_name_beginner (*input_line_pointer))
472 char *line_start = input_line_pointer;
473 char c = get_symbol_end ();
475 if (! ignore_input ())
477 /* In MRI mode, the EQU pseudoop must be
478 handled specially. */
481 if (((strncasecmp (input_line_pointer + 1,
483 || (strncasecmp (input_line_pointer + 1,
485 && (input_line_pointer[4] == ' '
486 || input_line_pointer[4] == '\t'))
488 input_line_pointer += 4;
494 mri_line_label = colon (line_start);
497 *input_line_pointer = c;
499 input_line_pointer++;
505 * We are at the begining of a line, or similar place.
506 * We expect a well-formed assembler statement.
507 * A "symbol-name:" is a statement.
509 * Depending on what compiler is used, the order of these tests
510 * may vary to catch most common case 1st.
511 * Each test is independent of all other tests at the (top) level.
512 * PLEASE make a compiler that doesn't use this assembler.
513 * It is crufty to waste a compiler's time encoding things for this
514 * assembler, which then wastes more time decoding it.
515 * (And communicating via (linear) files is silly!
516 * If you must pass stuff, please pass a tree!)
518 if ((c = *input_line_pointer++) == '\t'
523 c = *input_line_pointer++;
525 know (c != ' '); /* No further leading whitespace. */
528 * C is the 1st significant character.
529 * Input_line_pointer points after that character.
531 if (is_name_beginner (c))
533 /* want user-defined label or pseudo/opcode */
534 HANDLE_CONDITIONAL_ASSEMBLY ();
536 s = --input_line_pointer;
537 c = get_symbol_end (); /* name's delimiter */
539 * C is character after symbol.
540 * That character's place in the input line is now '\0'.
541 * S points to the beginning of the symbol.
542 * [In case of pseudo-op, s->'.'.]
543 * Input_line_pointer->'\0' where c was.
545 if (TC_START_LABEL(c, input_line_pointer))
547 colon (s); /* user-defined label */
548 *input_line_pointer++ = ':'; /* Put ':' back for error messages' sake. */
549 /* Input_line_pointer->after ':'. */
555 || (input_line_pointer[1] == '='
556 #ifdef TC_EQUAL_IN_INSN
557 && ! TC_EQUAL_IN_INSN (c, input_line_pointer)
562 demand_empty_rest_of_line ();
565 { /* expect pseudo-op or machine instruction */
568 #define IGNORE_OPCODE_CASE
569 #ifdef IGNORE_OPCODE_CASE
587 /* The MRI assembler and the m88k use pseudo-ops
589 pop = (pseudo_typeS *) hash_find (po_hash, s);
590 if (pop != NULL && pop->poc_handler == NULL)
594 if (pop != NULL || *s == '.')
599 * WARNING: c has next char, which may be end-of-line.
600 * We lookup the pseudo-op table with s+1 because we
601 * already know that the pseudo-op begins with a '.'.
605 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
607 /* In MRI mode, we may need to insert an
608 automatic alignment directive. What a hack
610 if (mri_pending_align
612 || ! ((pop->poc_handler == cons
613 && pop->poc_val == 1)
614 || (pop->poc_handler == s_space
615 && pop->poc_val == 1))))
617 do_align (1, (char *) NULL);
618 mri_pending_align = 0;
621 /* Print the error msg now, while we still can */
624 as_bad ("Unknown pseudo-op: `%s'", s);
625 *input_line_pointer = c;
630 /* Put it back for error messages etc. */
631 *input_line_pointer = c;
632 /* The following skip of whitespace is compulsory.
633 A well shaped space is sometimes all that separates
634 keyword from operands. */
635 if (c == ' ' || c == '\t')
636 input_line_pointer++;
638 * Input_line is restored.
639 * Input_line_pointer->1st non-blank char
640 * after pseudo-operation.
642 (*pop->poc_handler) (pop->poc_val);
644 /* If that was .end, just get out now. */
645 if (pop->poc_handler == s_end)
649 { /* machine instruction */
650 if (mri_pending_align)
652 do_align (1, (char *) NULL);
653 mri_pending_align = 0;
656 /* WARNING: c has char, which may be end-of-line. */
657 /* Also: input_line_pointer->`\0` where c was. */
658 *input_line_pointer = c;
659 while (!is_end_of_line[(unsigned char) *input_line_pointer]
660 #ifdef TC_EOL_IN_INSN
661 || TC_EOL_IN_INSN (input_line_pointer)
665 input_line_pointer++;
668 c = *input_line_pointer;
669 *input_line_pointer = '\0';
671 #ifdef OBJ_GENERATE_ASM_LINENO
672 if (generate_asm_lineno == 0)
674 if (ecoff_no_current_file ())
675 generate_asm_lineno = 1;
677 if (generate_asm_lineno == 1)
682 as_where (&s, &lineno);
683 OBJ_GENERATE_ASM_LINENO (s, lineno);
687 md_assemble (s); /* Assemble 1 instruction. */
689 *input_line_pointer++ = c;
691 /* We resume loop AFTER the end-of-line from
696 } /* if (is_name_beginner(c) */
699 /* Empty statement? */
700 if (is_end_of_line[(unsigned char) c])
703 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB)
706 /* local label ("4:") */
707 char *backup = input_line_pointer;
709 HANDLE_CONDITIONAL_ASSEMBLY ();
713 while (isdigit (*input_line_pointer))
715 temp = (temp * 10) + *input_line_pointer - '0';
716 ++input_line_pointer;
717 } /* read the whole number */
719 if (LOCAL_LABELS_DOLLAR
720 && *input_line_pointer == '$'
721 && *(input_line_pointer + 1) == ':')
723 input_line_pointer += 2;
725 if (dollar_label_defined (temp))
727 as_fatal ("label \"%d$\" redefined", temp);
730 define_dollar_label (temp);
731 colon (dollar_label_name (temp, 0));
736 && *input_line_pointer++ == ':')
738 fb_label_instance_inc (temp);
739 colon (fb_label_name (temp, 0));
743 input_line_pointer = backup;
744 } /* local label ("4:") */
746 if (c && strchr (line_comment_chars, c))
747 { /* Its a comment. Better say APP or NO_APP */
751 unsigned int new_length;
753 extern char *scrub_string, *scrub_last_string;
755 bump_line_counters ();
756 s = input_line_pointer;
757 if (strncmp (s, "APP\n", 4))
758 continue; /* We ignore it */
761 ends = strstr (s, "#NO_APP\n");
765 unsigned int tmp_len;
768 /* The end of the #APP wasn't in this buffer. We
769 keep reading in buffers until we find the #NO_APP
770 that goes with this #APP There is one. The specs
772 tmp_len = buffer_limit - s;
773 tmp_buf = xmalloc (tmp_len + 1);
774 memcpy (tmp_buf, s, tmp_len);
777 new_tmp = input_scrub_next_buffer (&buffer);
781 buffer_limit = new_tmp;
782 input_line_pointer = buffer;
783 ends = strstr (buffer, "#NO_APP\n");
787 num = buffer_limit - buffer;
789 tmp_buf = xrealloc (tmp_buf, tmp_len + num);
790 memcpy (tmp_buf + tmp_len, buffer, num);
795 input_line_pointer = ends ? ends + 8 : NULL;
803 input_line_pointer = ends + 8;
805 new_buf = xmalloc (100);
810 scrub_last_string = ends;
815 ch = do_scrub_next_char (scrub_from_string, scrub_to_string);
819 if (new_tmp == new_buf + new_length)
821 new_buf = xrealloc (new_buf, new_length + 100);
822 new_tmp = new_buf + new_length;
830 old_input = input_line_pointer;
831 old_limit = buffer_limit;
833 input_line_pointer = new_buf;
834 buffer_limit = new_tmp;
838 HANDLE_CONDITIONAL_ASSEMBLY ();
840 /* as_warn("Junk character %d.",c); Now done by ignore_rest */
841 input_line_pointer--; /* Report unknown char as ignored. */
842 ignore_rest_of_line ();
843 } /* while (input_line_pointer<buffer_limit) */
845 #ifdef md_after_pass_hook
846 md_after_pass_hook ();
851 bump_line_counters ();
855 input_line_pointer = old_input;
856 buffer_limit = old_limit;
861 } /* while (more buffers to scan) */
864 input_scrub_close (); /* Close the input file */
871 as_fatal (".abort detected. Abandoning ship.");
874 /* Guts of .align directive. */
881 md_do_align (n, fill, just_record_alignment);
885 /* @@ Fix this right for BFD! */
887 static char nop_opcode = NOP_OPCODE;
889 if (now_seg != data_section && now_seg != bss_section)
898 /* Only make a frag if we HAVE to. . . */
899 if (n && !need_pass_2)
900 frag_align (n, *fill);
903 just_record_alignment:
906 record_alignment (now_seg, n);
909 /* For machines where ".align 4" means align to a 4 byte boundary. */
914 register unsigned int temp;
917 unsigned long max_alignment = 1 << 15;
919 if (is_end_of_line[(unsigned char) *input_line_pointer])
920 temp = arg; /* Default value from pseudo-op table */
922 temp = get_absolute_expression ();
924 if (temp > max_alignment)
926 as_bad ("Alignment too large: %d. assumed.", temp = max_alignment);
929 /* For the sparc, `.align (1<<n)' actually means `.align n' so we
930 have to convert it. */
933 for (i = 0; (temp & 1) == 0; temp >>= 1, ++i)
937 as_bad ("Alignment not a power of 2");
940 if (*input_line_pointer == ',')
942 input_line_pointer++;
943 temp_fill = get_absolute_expression ();
944 do_align (temp, &temp_fill);
947 do_align (temp, (char *) 0);
949 demand_empty_rest_of_line ();
952 /* For machines where ".align 4" means align to 2**4 boundary. */
954 s_align_ptwo (ignore)
959 long max_alignment = 15;
961 temp = get_absolute_expression ();
962 if (temp > max_alignment)
963 as_bad ("Alignment too large: %d. assumed.", temp = max_alignment);
966 as_bad ("Alignment negative. 0 assumed.");
969 if (*input_line_pointer == ',')
971 input_line_pointer++;
972 temp_fill = get_absolute_expression ();
973 do_align (temp, &temp_fill);
976 do_align (temp, (char *) 0);
978 demand_empty_rest_of_line ();
989 register symbolS *symbolP;
991 name = input_line_pointer;
992 c = get_symbol_end ();
993 /* just after name is now '\0' */
994 p = input_line_pointer;
997 if (*input_line_pointer != ',')
999 as_bad ("Expected comma after symbol-name: rest of line ignored.");
1000 ignore_rest_of_line ();
1003 input_line_pointer++; /* skip ',' */
1004 if ((temp = get_absolute_expression ()) < 0)
1006 as_warn (".COMMon length (%ld.) <0! Ignored.", (long) temp);
1007 ignore_rest_of_line ();
1011 symbolP = symbol_find_or_make (name);
1013 if (S_IS_DEFINED (symbolP))
1015 as_bad ("Ignoring attempt to re-define symbol `%s'.",
1016 S_GET_NAME (symbolP));
1017 ignore_rest_of_line ();
1020 if (S_GET_VALUE (symbolP))
1022 if (S_GET_VALUE (symbolP) != (valueT) temp)
1023 as_bad ("Length of .comm \"%s\" is already %ld. Not changed to %ld.",
1024 S_GET_NAME (symbolP),
1025 (long) S_GET_VALUE (symbolP),
1030 S_SET_VALUE (symbolP, (valueT) temp);
1031 S_SET_EXTERNAL (symbolP);
1035 extern int flag_one;
1036 if ( (!temp) || !flag_one)
1037 S_GET_OTHER(symbolP) = const_flag;
1039 #endif /* not OBJ_VMS */
1040 know (symbolP->sy_frag == &zero_address_frag);
1041 demand_empty_rest_of_line ();
1044 /* The MRI COMMON pseudo-op. We handle this by creating a common
1045 symbol with the appropriate name. We make s_space do the right
1046 thing by increasing the size. */
1049 s_mri_common (small)
1066 name = input_line_pointer;
1067 if (! isdigit ((unsigned char) *name))
1068 c = get_symbol_end ();
1073 ++input_line_pointer;
1075 while (isdigit ((unsigned char) *input_line_pointer));
1076 c = *input_line_pointer;
1077 *input_line_pointer = '\0';
1079 if (mri_line_label != NULL)
1081 alc = (char *) xmalloc (strlen (S_GET_NAME (mri_line_label))
1082 + (input_line_pointer - name)
1084 sprintf (alc, "%s%s", name, S_GET_NAME (mri_line_label));
1089 sym = symbol_find_or_make (name);
1090 *input_line_pointer = c;
1094 if (*input_line_pointer != ',')
1098 ++input_line_pointer;
1099 align = get_absolute_expression ();
1102 if (S_IS_DEFINED (sym))
1104 #if defined (S_IS_COMMON) || defined (BFD_ASSEMBLER)
1105 if (! S_IS_COMMON (sym))
1108 as_bad ("attempt to re-define symbol `%s'", S_GET_NAME (sym));
1109 ignore_rest_of_line ();
1114 S_SET_EXTERNAL (sym);
1115 mri_common_symbol = sym;
1119 S_SET_ALIGN (sym, align);
1122 if (mri_line_label != NULL)
1124 mri_line_label->sy_value.X_op = O_symbol;
1125 mri_line_label->sy_value.X_add_symbol = sym;
1126 mri_line_label->sy_value.X_add_number = S_GET_VALUE (sym);
1127 mri_line_label->sy_frag = &zero_address_frag;
1128 S_SET_SEGMENT (mri_line_label, expr_section);
1131 /* FIXME: We just ignore the small argument, which distinguishes
1132 COMMON and COMMON.S. I don't know what we can do about it. */
1134 /* Ignore the type and hptype. */
1135 if (*input_line_pointer == ',')
1136 input_line_pointer += 2;
1137 if (*input_line_pointer == ',')
1138 input_line_pointer += 2;
1139 demand_empty_rest_of_line ();
1149 temp = get_absolute_expression ();
1150 if (flag_readonly_data_in_text)
1152 section = text_section;
1156 section = data_section;
1158 subseg_set (section, (subsegT) temp);
1163 demand_empty_rest_of_line ();
1166 /* Handle the .appfile pseudo-op. This is automatically generated by
1167 do_scrub_next_char when a preprocessor # line comment is seen with
1168 a file name. This default definition may be overridden by the
1169 object or CPU specific pseudo-ops. This function is also the
1170 default definition for .file; the APPFILE argument is 1 for
1171 .appfile, 0 for .file. */
1174 s_app_file (appfile)
1180 /* Some assemblers tolerate immediately following '"' */
1181 if ((s = demand_copy_string (&length)) != 0)
1183 /* If this is a fake .appfile, a fake newline was inserted into
1184 the buffer. Passing -2 to new_logical_line tells it to
1186 new_logical_line (s, appfile ? -2 : -1);
1187 demand_empty_rest_of_line ();
1190 listing_source_file (s);
1198 /* Handle the .appline pseudo-op. This is automatically generated by
1199 do_scrub_next_char when a preprocessor # line comment is seen.
1200 This default definition may be overridden by the object or CPU
1201 specific pseudo-ops. */
1209 /* The given number is that of the next line. */
1210 l = get_absolute_expression () - 1;
1212 /* Some of the back ends can't deal with non-positive line numbers.
1213 Besides, it's silly. */
1214 as_warn ("Line numbers must be positive; line number %d rejected.", l+1);
1217 new_logical_line ((char *) NULL, l);
1220 listing_source_line (l);
1223 demand_empty_rest_of_line ();
1226 /* Handle the .end pseudo-op. Actually, the real work is done in
1227 read_a_source_file. */
1235 /* The MRI assembler permits the start symbol to follow .end,
1236 but we don't support that. */
1238 if (! is_end_of_line[(unsigned char) *input_line_pointer])
1239 as_warn ("start address not supported");
1243 /* Handle the MRI fail pseudo-op. */
1251 temp = get_absolute_expression ();
1253 as_warn (".fail %ld encountered", (long) temp);
1255 as_bad (".fail %ld encountered", (long) temp);
1256 demand_empty_rest_of_line ();
1263 long temp_repeat = 0;
1265 register long temp_fill = 0;
1269 temp_repeat = get_absolute_expression ();
1270 if (*input_line_pointer == ',')
1272 input_line_pointer++;
1273 temp_size = get_absolute_expression ();
1274 if (*input_line_pointer == ',')
1276 input_line_pointer++;
1277 temp_fill = get_absolute_expression ();
1280 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1281 #define BSD_FILL_SIZE_CROCK_8 (8)
1282 if (temp_size > BSD_FILL_SIZE_CROCK_8)
1284 as_warn (".fill size clamped to %d.", BSD_FILL_SIZE_CROCK_8);
1285 temp_size = BSD_FILL_SIZE_CROCK_8;
1289 as_warn ("Size negative: .fill ignored.");
1292 else if (temp_repeat <= 0)
1294 as_warn ("Repeat < 0, .fill ignored");
1298 if (temp_size && !need_pass_2)
1300 p = frag_var (rs_fill, (int) temp_size, (int) temp_size, (relax_substateT) 0, (symbolS *) 0, temp_repeat, (char *) 0);
1301 memset (p, 0, (unsigned int) temp_size);
1302 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1303 * flavoured AS. The following bizzare behaviour is to be
1304 * compatible with above. I guess they tried to take up to 8
1305 * bytes from a 4-byte expression and they forgot to sign
1306 * extend. Un*x Sux. */
1307 #define BSD_FILL_SIZE_CROCK_4 (4)
1308 md_number_to_chars (p, (valueT) temp_fill,
1309 (temp_size > BSD_FILL_SIZE_CROCK_4
1310 ? BSD_FILL_SIZE_CROCK_4
1311 : (int) temp_size));
1312 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1313 * but emits no error message because it seems a legal thing to do.
1314 * It is a degenerate case of .fill but could be emitted by a compiler.
1317 demand_empty_rest_of_line ();
1330 name = input_line_pointer;
1331 c = get_symbol_end ();
1332 symbolP = symbol_find_or_make (name);
1333 *input_line_pointer = c;
1335 S_SET_EXTERNAL (symbolP);
1338 input_line_pointer++;
1340 if (*input_line_pointer == '\n')
1345 demand_empty_rest_of_line ();
1349 s_lcomm (needs_align)
1350 /* 1 if this was a ".bss" directive, which may require a 3rd argument
1351 (alignment); 0 if it was an ".lcomm" (2 args only) */
1354 register char *name;
1358 register symbolS *symbolP;
1359 segT current_seg = now_seg;
1360 subsegT current_subseg = now_subseg;
1361 const int max_alignment = 15;
1363 segT bss_seg = bss_section;
1365 name = input_line_pointer;
1366 c = get_symbol_end ();
1367 p = input_line_pointer;
1371 /* Accept an optional comma after the name. The comma used to be
1372 required, but Irix 5 cc does not generate it. */
1373 if (*input_line_pointer == ',')
1375 ++input_line_pointer;
1379 if (*input_line_pointer == '\n')
1381 as_bad ("Missing size expression");
1385 if ((temp = get_absolute_expression ()) < 0)
1387 as_warn ("BSS length (%d.) <0! Ignored.", temp);
1388 ignore_rest_of_line ();
1392 #if defined (TC_MIPS) || defined (TC_ALPHA)
1393 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
1394 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
1396 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
1397 if (temp <= bfd_get_gp_size (stdoutput))
1399 bss_seg = subseg_new (".sbss", 1);
1400 seg_info (bss_seg)->bss = 1;
1406 /* FIXME. This needs to be machine independent. */
1416 record_alignment(bss_seg, align);
1423 if (*input_line_pointer != ',')
1425 as_bad ("Expected comma after size");
1426 ignore_rest_of_line ();
1429 input_line_pointer++;
1431 if (*input_line_pointer == '\n')
1433 as_bad ("Missing alignment");
1436 align = get_absolute_expression ();
1437 if (align > max_alignment)
1439 align = max_alignment;
1440 as_warn ("Alignment too large: %d. assumed.", align);
1445 as_warn ("Alignment negative. 0 assumed.");
1447 record_alignment (bss_seg, align);
1448 } /* if needs align */
1451 /* Assume some objects may require alignment on some systems. */
1455 align = ffs (temp) - 1;
1456 if (temp % (1 << align))
1463 symbolP = symbol_find_or_make (name);
1467 #if defined(OBJ_AOUT) | defined(OBJ_BOUT)
1468 S_GET_OTHER (symbolP) == 0 &&
1469 S_GET_DESC (symbolP) == 0 &&
1470 #endif /* OBJ_AOUT or OBJ_BOUT */
1471 (S_GET_SEGMENT (symbolP) == bss_seg
1472 || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0)))
1476 subseg_set (bss_seg, 1);
1479 frag_align (align, 0);
1480 /* detach from old frag */
1481 if (S_GET_SEGMENT (symbolP) == bss_seg)
1482 symbolP->sy_frag->fr_symbol = NULL;
1484 symbolP->sy_frag = frag_now;
1485 pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP,
1489 S_SET_SEGMENT (symbolP, bss_seg);
1492 /* The symbol may already have been created with a preceding
1493 ".globl" directive -- be careful not to step on storage class
1494 in that case. Otherwise, set it to static. */
1495 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
1497 S_SET_STORAGE_CLASS (symbolP, C_STAT);
1499 #endif /* OBJ_COFF */
1502 as_bad ("Ignoring attempt to re-define symbol `%s'.",
1503 S_GET_NAME (symbolP));
1505 subseg_set (current_seg, current_subseg);
1507 demand_empty_rest_of_line ();
1514 register char *name;
1518 register symbolS *symbolP;
1520 /* we permit ANY defined expression: BSD4.2 demands constants */
1521 name = input_line_pointer;
1522 c = get_symbol_end ();
1523 p = input_line_pointer;
1526 if (*input_line_pointer != ',')
1529 as_bad ("Expected comma after name \"%s\"", name);
1531 ignore_rest_of_line ();
1534 input_line_pointer++;
1536 if (exp.X_op != O_constant
1537 && exp.X_op != O_register)
1539 as_bad ("bad expression");
1540 ignore_rest_of_line ();
1544 symbolP = symbol_find_or_make (name);
1546 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
1547 symbolP->sy_desc == 0) out of this test because coff doesn't have
1548 those fields, and I can't see when they'd ever be tripped. I
1549 don't think I understand why they were here so I may have
1550 introduced a bug. As recently as 1.37 didn't have this test
1551 anyway. xoxorich. */
1553 if (S_GET_SEGMENT (symbolP) == undefined_section
1554 && S_GET_VALUE (symbolP) == 0)
1556 /* The name might be an undefined .global symbol; be sure to
1557 keep the "external" bit. */
1558 S_SET_SEGMENT (symbolP,
1559 (exp.X_op == O_constant
1562 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
1566 as_bad ("Symbol %s already defined", name);
1569 demand_empty_rest_of_line ();
1572 /* Handle changing the location counter. */
1575 do_org (segment, exp, fill)
1580 if (segment != now_seg && segment != absolute_section)
1581 as_bad ("invalid segment \"%s\"; segment \"%s\" assumed",
1582 segment_name (segment), segment_name (now_seg));
1584 if (now_seg == absolute_section)
1587 as_warn ("ignoring fill value in absolute section");
1588 if (exp->X_op != O_constant)
1590 as_bad ("only constant offsets supported in absolute section");
1591 exp->X_add_number = 0;
1593 abs_section_offset = exp->X_add_number;
1599 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp->X_add_symbol,
1600 exp->X_add_number, (char *) NULL);
1609 register segT segment;
1611 register long temp_fill;
1613 /* The MRI assembler has a different meaning for .org. It means to
1614 create an absolute section at a given address. We can't support
1615 that--use a linker script instead. */
1618 as_bad ("MRI style ORG pseudo-op not supported");
1619 ignore_rest_of_line ();
1623 /* Don't believe the documentation of BSD 4.2 AS. There is no such
1624 thing as a sub-segment-relative origin. Any absolute origin is
1625 given a warning, then assumed to be segment-relative. Any
1626 segmented origin expression ("foo+42") had better be in the right
1627 segment or the .org is ignored.
1629 BSD 4.2 AS warns if you try to .org backwards. We cannot because
1630 we never know sub-segment sizes when we are reading code. BSD
1631 will crash trying to emit negative numbers of filler bytes in
1632 certain .orgs. We don't crash, but see as-write for that code.
1634 Don't make frag if need_pass_2==1. */
1635 segment = get_known_segmented_expression (&exp);
1636 if (*input_line_pointer == ',')
1638 input_line_pointer++;
1639 temp_fill = get_absolute_expression ();
1645 do_org (segment, &exp, temp_fill);
1647 demand_empty_rest_of_line ();
1650 /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
1651 called by the obj-format routine which handles section changing
1652 when in MRI mode. It will create a new section, and return it. It
1653 will set *TYPE to the section type: one of '\0' (unspecified), 'C'
1654 (code), 'D' (data), 'M' (mixed), or 'R' (romable). If
1655 BFD_ASSEMBLER is defined, the flags will be set in the section. */
1667 name = input_line_pointer;
1668 if (! isdigit ((unsigned char) *name))
1669 c = get_symbol_end ();
1674 ++input_line_pointer;
1676 while (isdigit ((unsigned char) *input_line_pointer));
1677 c = *input_line_pointer;
1678 *input_line_pointer = '\0';
1681 name = strdup (name);
1683 as_fatal ("virtual memory exhausted");
1685 *input_line_pointer = c;
1687 seg = subseg_new (name, 0);
1689 if (*input_line_pointer == ',')
1693 ++input_line_pointer;
1694 align = get_absolute_expression ();
1695 record_alignment (seg, align);
1699 if (*input_line_pointer == ',')
1701 c = *++input_line_pointer;
1702 c = toupper ((unsigned char) c);
1703 if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
1706 as_bad ("unrecognized section type");
1707 ++input_line_pointer;
1709 #ifdef BFD_ASSEMBLER
1713 flags = SEC_NO_FLAGS;
1716 else if (type == 'D')
1718 else if (type == 'R')
1720 if (flags != SEC_NO_FLAGS)
1722 if (! bfd_set_section_flags (stdoutput, seg, flags))
1723 as_warn ("error setting flags for \"%s\": %s",
1724 bfd_section_name (stdoutput, sec),
1725 bfd_errmsg (bfd_get_error ()));
1731 /* Ignore the HP type. */
1732 if (*input_line_pointer == ',')
1733 input_line_pointer += 2;
1735 demand_empty_rest_of_line ();
1742 register char *name;
1743 register char delim;
1744 register char *end_name;
1745 register symbolS *symbolP;
1748 * Especial apologies for the random logic:
1749 * this just grew, and could be parsed much more simply!
1752 name = input_line_pointer;
1753 delim = get_symbol_end ();
1754 end_name = input_line_pointer;
1758 if (*input_line_pointer != ',')
1761 as_bad ("Expected comma after name \"%s\"", name);
1763 ignore_rest_of_line ();
1767 input_line_pointer++;
1770 if (name[0] == '.' && name[1] == '\0')
1772 /* Turn '. = mumble' into a .org mumble */
1773 register segT segment;
1776 segment = get_known_segmented_expression (&exp);
1779 do_org (segment, &exp, 0);
1785 if ((symbolP = symbol_find (name)) == NULL
1786 && (symbolP = md_undefined_symbol (name)) == NULL)
1788 symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag);
1790 /* "set" symbols are local unless otherwise specified. */
1791 SF_SET_LOCAL (symbolP);
1792 #endif /* OBJ_COFF */
1794 } /* make a new symbol */
1796 symbol_table_insert (symbolP);
1799 pseudo_set (symbolP);
1800 demand_empty_rest_of_line ();
1811 #ifdef md_flush_pending_output
1812 md_flush_pending_output ();
1815 /* Just like .fill, but temp_size = 1 */
1817 if (exp.X_op == O_constant)
1821 repeat = exp.X_add_number;
1826 as_warn (".space repeat count is %s, ignored",
1827 repeat ? "negative" : "zero");
1828 ignore_rest_of_line ();
1832 /* If we are in the absolute section, just bump the offset. */
1833 if (now_seg == absolute_section)
1835 abs_section_offset += repeat;
1836 demand_empty_rest_of_line ();
1840 /* If we are secretly in an MRI common section, then creating
1841 space just increases the size of the common symbol. */
1842 if (mri_common_symbol != NULL)
1844 S_SET_VALUE (mri_common_symbol,
1845 S_GET_VALUE (mri_common_symbol) + repeat);
1846 demand_empty_rest_of_line ();
1851 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
1852 repeat, (char *) 0);
1856 if (now_seg == absolute_section)
1858 as_bad ("space allocation too complex in absolute section");
1859 subseg_set (text_section, 0);
1861 if (mri_common_symbol != NULL)
1863 as_bad ("space allocation too complex in common section");
1864 mri_common_symbol = NULL;
1867 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
1868 make_expr_symbol (&exp), 0L, (char *) 0);
1871 if (*input_line_pointer == ',')
1873 input_line_pointer++;
1874 temp_fill = get_absolute_expression ();
1884 demand_empty_rest_of_line ();
1887 /* This is like s_space, but the value is a floating point number with
1888 the given precision. This is for the MRI dcb.s pseudo-op and
1892 s_float_space (float_type)
1897 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
1899 count = get_absolute_expression ();
1902 if (*input_line_pointer != ',')
1904 as_bad ("missing value");
1905 ignore_rest_of_line ();
1909 ++input_line_pointer;
1913 /* Skip any 0{letter} that may be present. Don't even check if the
1914 * letter is legal. */
1915 if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1]))
1916 input_line_pointer += 2;
1918 /* Accept :xxxx, where the x's are hex digits, for a floating point
1919 with the exact digits specified. */
1920 if (input_line_pointer[0] == ':')
1922 flen = hex_float (float_type, temp);
1925 ignore_rest_of_line ();
1933 err = md_atof (float_type, temp, &flen);
1934 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
1938 as_bad ("Bad floating literal: %s", err);
1939 ignore_rest_of_line ();
1944 while (--count >= 0)
1948 p = frag_more (flen);
1949 memcpy (p, temp, (unsigned int) flen);
1952 demand_empty_rest_of_line ();
1955 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
1961 abs_section_offset = get_absolute_expression ();
1962 subseg_set (absolute_section, 0);
1963 demand_empty_rest_of_line ();
1972 temp = get_absolute_expression ();
1973 subseg_set (text_section, (subsegT) temp);
1974 demand_empty_rest_of_line ();
1976 const_flag &= ~IN_DEFAULT_SECTION;
1982 demand_empty_rest_of_line ()
1985 if (is_end_of_line[(unsigned char) *input_line_pointer])
1987 input_line_pointer++;
1991 ignore_rest_of_line ();
1993 /* Return having already swallowed end-of-line. */
1994 } /* Return pointing just after end-of-line. */
1997 ignore_rest_of_line () /* For suspect lines: gives warning. */
1999 if (!is_end_of_line[(unsigned char) *input_line_pointer])
2001 if (isprint (*input_line_pointer))
2002 as_bad ("Rest of line ignored. First ignored character is `%c'.",
2003 *input_line_pointer);
2005 as_bad ("Rest of line ignored. First ignored character valued 0x%x.",
2006 *input_line_pointer);
2007 while (input_line_pointer < buffer_limit
2008 && !is_end_of_line[(unsigned char) *input_line_pointer])
2010 input_line_pointer++;
2013 input_line_pointer++; /* Return pointing just after end-of-line. */
2014 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
2020 * In: Pointer to a symbol.
2021 * Input_line_pointer->expression.
2023 * Out: Input_line_pointer->just after any whitespace after expression.
2024 * Tried to set symbol to value of expression.
2025 * Will change symbols type, value, and frag;
2028 pseudo_set (symbolP)
2032 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
2034 #endif /* OBJ_AOUT or OBJ_BOUT */
2036 know (symbolP); /* NULL pointer is logic error. */
2037 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
2038 ext = S_IS_EXTERNAL (symbolP);
2039 #endif /* OBJ_AOUT or OBJ_BOUT */
2041 (void) expression (&exp);
2043 if (exp.X_op == O_illegal)
2044 as_bad ("illegal expression; zero assumed");
2045 else if (exp.X_op == O_absent)
2046 as_bad ("missing expression; zero assumed");
2047 else if (exp.X_op == O_big)
2048 as_bad ("%s number invalid; zero assumed",
2049 exp.X_add_number > 0 ? "bignum" : "floating point");
2050 else if (exp.X_op == O_subtract
2051 && (S_GET_SEGMENT (exp.X_add_symbol)
2052 == S_GET_SEGMENT (exp.X_op_symbol))
2053 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
2054 && exp.X_add_symbol->sy_frag == exp.X_op_symbol->sy_frag)
2056 exp.X_op = O_constant;
2057 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
2058 - S_GET_VALUE (exp.X_op_symbol));
2066 exp.X_add_number = 0;
2069 S_SET_SEGMENT (symbolP, absolute_section);
2070 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
2072 S_SET_EXTERNAL (symbolP);
2074 S_CLEAR_EXTERNAL (symbolP);
2075 #endif /* OBJ_AOUT or OBJ_BOUT */
2076 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2077 symbolP->sy_frag = &zero_address_frag;
2081 S_SET_SEGMENT (symbolP, reg_section);
2082 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
2083 symbolP->sy_frag = &zero_address_frag;
2087 if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section
2088 || exp.X_add_number != 0)
2089 symbolP->sy_value = exp;
2092 symbolS *s = exp.X_add_symbol;
2094 S_SET_SEGMENT (symbolP, S_GET_SEGMENT (s));
2095 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
2097 S_SET_EXTERNAL (symbolP);
2099 S_CLEAR_EXTERNAL (symbolP);
2100 #endif /* OBJ_AOUT or OBJ_BOUT */
2101 S_SET_VALUE (symbolP,
2102 exp.X_add_number + S_GET_VALUE (s));
2103 symbolP->sy_frag = s->sy_frag;
2104 copy_symbol_attributes (symbolP, s);
2109 /* The value is some complex expression.
2110 FIXME: Should we set the segment to anything? */
2111 symbolP->sy_value = exp;
2119 * CONStruct more frag of .bytes, or .words etc.
2120 * Should need_pass_2 be 1 then emit no frag(s).
2121 * This understands EXPRESSIONS.
2125 * This has a split personality. We use expression() to read the
2126 * value. We can detect if the value won't fit in a byte or word.
2127 * But we can't detect if expression() discarded significant digits
2128 * in the case of a long. Not worth the crocks required to fix it.
2131 /* Select a parser for cons expressions. */
2133 /* Some targets need to parse the expression in various fancy ways.
2134 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
2135 (for example, the HPPA does this). Otherwise, you can define
2136 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
2137 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
2138 are defined, which is the normal case, then only simple expressions
2142 parse_mri_cons PARAMS ((expressionS *exp, unsigned int nbytes));
2144 #ifndef TC_PARSE_CONS_EXPRESSION
2145 #ifdef BITFIELD_CONS_EXPRESSIONS
2146 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
2148 parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes));
2150 #ifdef REPEAT_CONS_EXPRESSIONS
2151 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
2153 parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes));
2156 /* If we haven't gotten one yet, just call expression. */
2157 #ifndef TC_PARSE_CONS_EXPRESSION
2158 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
2162 /* worker to do .byte etc statements */
2163 /* clobbers input_line_pointer, checks */
2167 register int nbytes; /* 1=.byte, 2=.word, 4=.long */
2172 #ifdef md_flush_pending_output
2173 md_flush_pending_output ();
2176 if (is_it_end_of_statement ())
2178 demand_empty_rest_of_line ();
2186 parse_mri_cons (&exp, (unsigned int) nbytes);
2188 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
2189 emit_expr (&exp, (unsigned int) nbytes);
2192 while (*input_line_pointer++ == ',');
2194 /* In MRI mode, after an odd number of bytes, we must align to an
2195 even word boundary, unless the next instruction is a dc.b, ds.b
2197 if (flag_mri && nbytes == 1 && (c & 1) != 0)
2198 mri_pending_align = 1;
2200 input_line_pointer--; /* Put terminator back into stream. */
2201 demand_empty_rest_of_line ();
2204 /* Put the contents of expression EXP into the object file using
2205 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
2208 emit_expr (exp, nbytes)
2210 unsigned int nbytes;
2214 valueT extra_digit = 0;
2216 /* Don't do anything if we are going to make another pass. */
2222 /* Allow `.word 0' in the absolute section. */
2223 if (now_seg == absolute_section)
2225 if (op != O_constant || exp->X_add_number != 0)
2226 as_bad ("attempt to store value in absolute section");
2227 abs_section_offset += nbytes;
2231 /* Handle a negative bignum. */
2233 && exp->X_add_number == 0
2234 && exp->X_add_symbol->sy_value.X_op == O_big
2235 && exp->X_add_symbol->sy_value.X_add_number > 0)
2238 unsigned long carry;
2240 exp = &exp->X_add_symbol->sy_value;
2242 /* Negate the bignum: one's complement each digit and add 1. */
2244 for (i = 0; i < exp->X_add_number; i++)
2248 next = (((~ (generic_bignum[i] & LITTLENUM_MASK))
2251 generic_bignum[i] = next & LITTLENUM_MASK;
2252 carry = next >> LITTLENUM_NUMBER_OF_BITS;
2255 /* We can ignore any carry out, because it will be handled by
2256 extra_digit if it is needed. */
2258 extra_digit = (valueT) -1;
2262 if (op == O_absent || op == O_illegal)
2264 as_warn ("zero assumed for missing expression");
2265 exp->X_add_number = 0;
2268 else if (op == O_big && exp->X_add_number <= 0)
2270 as_bad ("floating point number invalid; zero assumed");
2271 exp->X_add_number = 0;
2274 else if (op == O_register)
2276 as_warn ("register value used as expression");
2280 p = frag_more ((int) nbytes);
2282 #ifndef WORKING_DOT_WORD
2283 /* If we have the difference of two symbols in a word, save it on
2284 the broken_words list. See the code in write.c. */
2285 if (op == O_subtract && nbytes == 2)
2287 struct broken_word *x;
2289 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
2290 x->next_broken_word = broken_words;
2293 x->word_goes_here = p;
2295 x->add = exp->X_add_symbol;
2296 x->sub = exp->X_op_symbol;
2297 x->addnum = exp->X_add_number;
2304 /* If we have an integer, but the number of bytes is too large to
2305 pass to md_number_to_chars, handle it as a bignum. */
2306 if (op == O_constant && nbytes > sizeof (valueT))
2311 if (! exp->X_unsigned && exp->X_add_number < 0)
2312 extra_digit = (valueT) -1;
2313 val = (valueT) exp->X_add_number;
2317 generic_bignum[gencnt] = val & LITTLENUM_MASK;
2318 val >>= LITTLENUM_NUMBER_OF_BITS;
2322 op = exp->X_op = O_big;
2323 exp->X_add_number = gencnt;
2326 if (op == O_constant)
2328 register valueT get;
2329 register valueT use;
2330 register valueT mask;
2331 register valueT unmask;
2333 /* JF << of >= number of bits in the object is undefined. In
2334 particular SPARC (Sun 4) has problems */
2335 if (nbytes >= sizeof (valueT))
2338 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes); /* Don't store these bits. */
2340 unmask = ~mask; /* Do store these bits. */
2343 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
2344 mask = ~(unmask >> 1); /* Includes sign bit now. */
2347 get = exp->X_add_number;
2349 if ((get & mask) != 0 && (get & mask) != mask)
2350 { /* Leading bits contain both 0s & 1s. */
2351 as_warn ("Value 0x%lx truncated to 0x%lx.", get, use);
2353 /* put bytes in right order. */
2354 md_number_to_chars (p, use, (int) nbytes);
2356 else if (op == O_big)
2359 LITTLENUM_TYPE *nums;
2361 know (nbytes % CHARS_PER_LITTLENUM == 0);
2363 size = exp->X_add_number * CHARS_PER_LITTLENUM;
2366 as_warn ("Bignum truncated to %d bytes", nbytes);
2370 if (target_big_endian)
2372 while (nbytes > size)
2374 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
2375 nbytes -= CHARS_PER_LITTLENUM;
2376 p += CHARS_PER_LITTLENUM;
2379 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
2383 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
2384 size -= CHARS_PER_LITTLENUM;
2385 p += CHARS_PER_LITTLENUM;
2390 nums = generic_bignum;
2393 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
2395 size -= CHARS_PER_LITTLENUM;
2396 p += CHARS_PER_LITTLENUM;
2397 nbytes -= CHARS_PER_LITTLENUM;
2402 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
2403 nbytes -= CHARS_PER_LITTLENUM;
2404 p += CHARS_PER_LITTLENUM;
2410 memset (p, 0, nbytes);
2412 /* Now we need to generate a fixS to record the symbol value.
2413 This is easy for BFD. For other targets it can be more
2414 complex. For very complex cases (currently, the HPPA and
2415 NS32K), you can define TC_CONS_FIX_NEW to do whatever you
2416 want. For simpler cases, you can define TC_CONS_RELOC to be
2417 the name of the reloc code that should be stored in the fixS.
2418 If neither is defined, the code uses NO_RELOC if it is
2419 defined, and otherwise uses 0. */
2421 #ifdef BFD_ASSEMBLER
2422 #ifdef TC_CONS_FIX_NEW
2423 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
2425 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0,
2426 /* @@ Should look at CPU word size. */
2427 nbytes == 2 ? BFD_RELOC_16
2428 : nbytes == 8 ? BFD_RELOC_64
2432 #ifdef TC_CONS_FIX_NEW
2433 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
2435 /* Figure out which reloc number to use. Use TC_CONS_RELOC if
2436 it is defined, otherwise use NO_RELOC if it is defined,
2438 #ifndef TC_CONS_RELOC
2440 #define TC_CONS_RELOC NO_RELOC
2442 #define TC_CONS_RELOC 0
2445 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0,
2447 #endif /* TC_CONS_FIX_NEW */
2448 #endif /* BFD_ASSEMBLER */
2452 #ifdef BITFIELD_CONS_EXPRESSIONS
2454 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
2455 w:x,y:z, where w and y are bitwidths and x and y are values. They
2456 then pack them all together. We do a little better in that we allow
2457 them in words, longs, etc. and we'll pack them in target byte order
2460 The rules are: pack least significat bit first, if a field doesn't
2461 entirely fit, put it in the next unit. Overflowing the bitfield is
2462 explicitly *not* even a warning. The bitwidth should be considered
2465 To use this function the tc-XXX.h file should define
2466 BITFIELD_CONS_EXPRESSIONS. */
2469 parse_bitfield_cons (exp, nbytes)
2471 unsigned int nbytes;
2473 unsigned int bits_available = BITS_PER_CHAR * nbytes;
2474 char *hold = input_line_pointer;
2476 (void) expression (exp);
2478 if (*input_line_pointer == ':')
2484 unsigned long width;
2486 if (*input_line_pointer != ':')
2488 input_line_pointer = hold;
2490 } /* next piece is not a bitfield */
2492 /* In the general case, we can't allow
2493 full expressions with symbol
2494 differences and such. The relocation
2495 entries for symbols not defined in this
2496 assembly would require arbitrary field
2497 widths, positions, and masks which most
2498 of our current object formats don't
2501 In the specific case where a symbol
2502 *is* defined in this assembly, we
2503 *could* build fixups and track it, but
2504 this could lead to confusion for the
2505 backends. I'm lazy. I'll take any
2506 SEG_ABSOLUTE. I think that means that
2507 you can use a previous .set or
2508 .equ type symbol. xoxorich. */
2510 if (exp->X_op == O_absent)
2512 as_warn ("using a bit field width of zero");
2513 exp->X_add_number = 0;
2514 exp->X_op = O_constant;
2515 } /* implied zero width bitfield */
2517 if (exp->X_op != O_constant)
2519 *input_line_pointer = '\0';
2520 as_bad ("field width \"%s\" too complex for a bitfield", hold);
2521 *input_line_pointer = ':';
2522 demand_empty_rest_of_line ();
2526 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
2528 as_warn ("field width %lu too big to fit in %d bytes: truncated to %d bits",
2529 width, nbytes, (BITS_PER_CHAR * nbytes));
2530 width = BITS_PER_CHAR * nbytes;
2533 if (width > bits_available)
2535 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
2536 input_line_pointer = hold;
2537 exp->X_add_number = value;
2541 hold = ++input_line_pointer; /* skip ':' */
2543 (void) expression (exp);
2544 if (exp->X_op != O_constant)
2546 char cache = *input_line_pointer;
2548 *input_line_pointer = '\0';
2549 as_bad ("field value \"%s\" too complex for a bitfield", hold);
2550 *input_line_pointer = cache;
2551 demand_empty_rest_of_line ();
2555 value |= ((~(-1 << width) & exp->X_add_number)
2556 << ((BITS_PER_CHAR * nbytes) - bits_available));
2558 if ((bits_available -= width) == 0
2559 || is_it_end_of_statement ()
2560 || *input_line_pointer != ',')
2563 } /* all the bitfields we're gonna get */
2565 hold = ++input_line_pointer;
2566 (void) expression (exp);
2567 } /* forever loop */
2569 exp->X_add_number = value;
2570 exp->X_op = O_constant;
2571 exp->X_unsigned = 1;
2572 } /* if looks like a bitfield */
2573 } /* parse_bitfield_cons() */
2575 #endif /* BITFIELD_CONS_EXPRESSIONS */
2577 /* Handle an MRI style string expression. */
2580 parse_mri_cons (exp, nbytes)
2582 unsigned int nbytes;
2584 if (*input_line_pointer != '\''
2585 && (input_line_pointer[1] != '\''
2586 || (*input_line_pointer != 'A'
2587 && *input_line_pointer != 'E')))
2588 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
2592 unsigned int result = 0;
2594 /* An MRI style string. Cut into as many bytes as will fit into
2595 a nbyte chunk, left justify if necessary, and separate with
2596 commas so we can try again later. */
2597 if (*input_line_pointer == 'A')
2598 ++input_line_pointer;
2599 else if (*input_line_pointer == 'E')
2601 as_bad ("EBCDIC constants are not supported");
2602 ++input_line_pointer;
2605 input_line_pointer++;
2606 for (scan = 0; scan < nbytes; scan++)
2608 if (*input_line_pointer == '\'')
2610 if (input_line_pointer[1] == '\'')
2612 input_line_pointer++;
2617 result = (result << 8) | (*input_line_pointer++);
2621 while (scan < nbytes)
2626 /* Create correct expression */
2627 exp->X_op = O_constant;
2628 exp->X_add_number = result;
2629 /* Fake it so that we can read the next char too */
2630 if (input_line_pointer[0] != '\'' ||
2631 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
2633 input_line_pointer -= 2;
2634 input_line_pointer[0] = ',';
2635 input_line_pointer[1] = '\'';
2638 input_line_pointer++;
2642 #ifdef REPEAT_CONS_EXPRESSIONS
2644 /* Parse a repeat expression for cons. This is used by the MIPS
2645 assembler. The format is NUMBER:COUNT; NUMBER appears in the
2646 object file COUNT times.
2648 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
2651 parse_repeat_cons (exp, nbytes)
2653 unsigned int nbytes;
2660 if (*input_line_pointer != ':')
2662 /* No repeat count. */
2666 ++input_line_pointer;
2667 expression (&count);
2668 if (count.X_op != O_constant
2669 || count.X_add_number <= 0)
2671 as_warn ("Unresolvable or nonpositive repeat count; using 1");
2675 /* The cons function is going to output this expression once. So we
2676 output it count - 1 times. */
2677 for (i = count.X_add_number - 1; i > 0; i--)
2678 emit_expr (exp, nbytes);
2681 #endif /* REPEAT_CONS_EXPRESSIONS */
2683 /* Parse a floating point number represented as a hex constant. This
2684 permits users to specify the exact bits they want in the floating
2688 hex_float (float_type, bytes)
2722 as_bad ("Unknown floating type type '%c'", float_type);
2726 /* It would be nice if we could go through expression to parse the
2727 hex constant, but if we get a bignum it's a pain to sort it into
2728 the buffer correctly. */
2730 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
2734 /* The MRI assembler accepts arbitrary underscores strewn about
2735 through the hex constant, so we ignore them as well. */
2736 if (*input_line_pointer == '_')
2738 ++input_line_pointer;
2744 as_warn ("Floating point constant too large");
2747 d = hex_value (*input_line_pointer) << 4;
2748 ++input_line_pointer;
2749 while (*input_line_pointer == '_')
2750 ++input_line_pointer;
2751 if (hex_p (*input_line_pointer))
2753 d += hex_value (*input_line_pointer);
2754 ++input_line_pointer;
2756 if (target_big_endian)
2759 bytes[length - i - 1] = d;
2765 if (target_big_endian)
2766 memset (bytes + i, 0, length - i);
2768 memset (bytes, 0, length - i);
2777 * CONStruct some more frag chars of .floats .ffloats etc.
2778 * Makes 0 or more new frags.
2779 * If need_pass_2 == 1, no frags are emitted.
2780 * This understands only floating literals, not expressions. Sorry.
2782 * A floating constant is defined by atof_generic(), except it is preceded
2783 * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
2784 * reading, I decided to be incompatible. This always tries to give you
2785 * rounded bits to the precision of the pseudo-op. Former AS did premature
2786 * truncatation, restored noisy bits instead of trailing 0s AND gave you
2787 * a choice of 2 flavours of noise according to which of 2 floating-point
2788 * scanners you directed AS to use.
2790 * In: input_line_pointer->whitespace before, or '0' of flonum.
2795 float_cons (float_type)
2796 /* Clobbers input_line-pointer, checks end-of-line. */
2797 register int float_type; /* 'f':.ffloat ... 'F':.float ... */
2800 int length; /* Number of chars in an object. */
2801 register char *err; /* Error from scanning floating literal. */
2802 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
2804 if (is_it_end_of_statement ())
2806 demand_empty_rest_of_line ();
2812 /* input_line_pointer->1st char of a flonum (we hope!). */
2815 /* Skip any 0{letter} that may be present. Don't even check if the
2816 * letter is legal. Someone may invent a "z" format and this routine
2817 * has no use for such information. Lusers beware: you get
2818 * diagnostics if your input is ill-conditioned.
2820 if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1]))
2821 input_line_pointer += 2;
2823 /* Accept :xxxx, where the x's are hex digits, for a floating
2824 point with the exact digits specified. */
2825 if (input_line_pointer[0] == ':')
2827 ++input_line_pointer;
2828 length = hex_float (float_type, temp);
2831 ignore_rest_of_line ();
2837 err = md_atof (float_type, temp, &length);
2838 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
2842 as_bad ("Bad floating literal: %s", err);
2843 ignore_rest_of_line ();
2854 #ifdef REPEAT_CONS_EXPRESSIONS
2855 if (*input_line_pointer == ':')
2857 expressionS count_exp;
2859 ++input_line_pointer;
2860 expression (&count_exp);
2861 if (count_exp.X_op != O_constant
2862 || count_exp.X_add_number <= 0)
2864 as_warn ("unresolvable or nonpositive repeat count; using 1");
2867 count = count_exp.X_add_number;
2871 while (--count >= 0)
2873 p = frag_more (length);
2874 memcpy (p, temp, (unsigned int) length);
2879 while (*input_line_pointer++ == ',');
2881 --input_line_pointer; /* Put terminator back into stream. */
2882 demand_empty_rest_of_line ();
2883 } /* float_cons() */
2888 * We read 0 or more ',' seperated, double-quoted strings.
2890 * Caller should have checked need_pass_2 is FALSE because we don't check it.
2895 stringer (append_zero) /* Worker to do .ascii etc statements. */
2896 /* Checks end-of-line. */
2897 register int append_zero; /* 0: don't append '\0', else 1 */
2899 register unsigned int c;
2901 #ifdef md_flush_pending_output
2902 md_flush_pending_output ();
2906 * The following awkward logic is to parse ZERO or more strings,
2907 * comma seperated. Recall a string expression includes spaces
2908 * before the opening '\"' and spaces after the closing '\"'.
2909 * We fake a leading ',' if there is (supposed to be)
2910 * a 1st, expression. We keep demanding expressions for each
2913 if (is_it_end_of_statement ())
2915 c = 0; /* Skip loop. */
2916 ++input_line_pointer; /* Compensate for end of loop. */
2920 c = ','; /* Do loop. */
2922 while (c == ',' || c == '<' || c == '"')
2925 switch (*input_line_pointer)
2928 ++input_line_pointer; /*->1st char of string. */
2929 while (is_a_char (c = next_char_of_string ()))
2931 FRAG_APPEND_1_CHAR (c);
2935 FRAG_APPEND_1_CHAR (0);
2937 know (input_line_pointer[-1] == '\"');
2940 input_line_pointer++;
2941 c = get_single_number ();
2942 FRAG_APPEND_1_CHAR (c);
2943 if (*input_line_pointer != '>')
2945 as_bad ("Expected <nn>");
2947 input_line_pointer++;
2950 input_line_pointer++;
2954 c = *input_line_pointer;
2957 demand_empty_rest_of_line ();
2960 /* FIXME-SOMEDAY: I had trouble here on characters with the
2961 high bits set. We'll probably also have trouble with
2962 multibyte chars, wide chars, etc. Also be careful about
2963 returning values bigger than 1 byte. xoxorich. */
2966 next_char_of_string ()
2968 register unsigned int c;
2970 c = *input_line_pointer++ & CHAR_MASK;
2977 #ifndef NO_STRING_ESCAPES
2979 switch (c = *input_line_pointer++)
3007 break; /* As itself. */
3023 for (i = 0, number = 0; isdigit (c) && i < 3; c = *input_line_pointer++, i++)
3025 number = number * 8 + c - '0';
3029 --input_line_pointer;
3038 c = *input_line_pointer++;
3039 while (isxdigit (c))
3042 number = number * 16 + c - '0';
3043 else if (isupper (c))
3044 number = number * 16 + c - 'A' + 10;
3046 number = number * 16 + c - 'a' + 10;
3047 c = *input_line_pointer++;
3050 --input_line_pointer;
3055 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
3056 as_warn ("Unterminated string: Newline inserted.");
3062 #ifdef ONLY_STANDARD_ESCAPES
3063 as_bad ("Bad escaped character in string, '?' assumed");
3065 #endif /* ONLY_STANDARD_ESCAPES */
3068 } /* switch on escaped char */
3070 #endif /* ! defined (NO_STRING_ESCAPES) */
3074 } /* switch on char */
3076 } /* next_char_of_string() */
3079 get_segmented_expression (expP)
3080 register expressionS *expP;
3082 register segT retval;
3084 retval = expression (expP);
3085 if (expP->X_op == O_illegal
3086 || expP->X_op == O_absent
3087 || expP->X_op == O_big)
3089 as_bad ("expected address expression; zero assumed");
3090 expP->X_op = O_constant;
3091 expP->X_add_number = 0;
3092 retval = absolute_section;
3098 get_known_segmented_expression (expP)
3099 register expressionS *expP;
3101 register segT retval;
3103 if ((retval = get_segmented_expression (expP)) == undefined_section)
3105 /* There is no easy way to extract the undefined symbol from the
3107 if (expP->X_add_symbol != NULL
3108 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
3109 as_warn ("symbol \"%s\" undefined; zero assumed",
3110 S_GET_NAME (expP->X_add_symbol));
3112 as_warn ("some symbol undefined; zero assumed");
3113 retval = absolute_section;
3114 expP->X_op = O_constant;
3115 expP->X_add_number = 0;
3117 know (retval == absolute_section || SEG_NORMAL (retval));
3119 } /* get_known_segmented_expression() */
3122 get_absolute_expression ()
3127 if (exp.X_op != O_constant)
3129 if (exp.X_op != O_absent)
3130 as_bad ("bad or irreducible absolute expression; zero assumed");
3131 exp.X_add_number = 0;
3133 return exp.X_add_number;
3136 char /* return terminator */
3137 get_absolute_expression_and_terminator (val_pointer)
3138 long *val_pointer; /* return value of expression */
3140 /* FIXME: val_pointer should probably be offsetT *. */
3141 *val_pointer = (long) get_absolute_expression ();
3142 return (*input_line_pointer++);
3146 * demand_copy_C_string()
3148 * Like demand_copy_string, but return NULL if the string contains any '\0's.
3149 * Give a warning if that happens.
3152 demand_copy_C_string (len_pointer)
3157 if ((s = demand_copy_string (len_pointer)) != 0)
3161 for (len = *len_pointer;
3170 as_bad ("This string may not contain \'\\0\'");
3178 * demand_copy_string()
3180 * Demand string, but return a safe (=private) copy of the string.
3181 * Return NULL if we can't read a string here.
3184 demand_copy_string (lenP)
3187 register unsigned int c;
3193 if (*input_line_pointer == '\"')
3195 input_line_pointer++; /* Skip opening quote. */
3197 while (is_a_char (c = next_char_of_string ()))
3199 obstack_1grow (¬es, c);
3202 /* JF this next line is so demand_copy_C_string will return a null
3203 termanated string. */
3204 obstack_1grow (¬es, '\0');
3205 retval = obstack_finish (¬es);
3209 as_warn ("Missing string");
3211 ignore_rest_of_line ();
3215 } /* demand_copy_string() */
3218 * is_it_end_of_statement()
3220 * In: Input_line_pointer->next character.
3222 * Do: Skip input_line_pointer over all whitespace.
3224 * Out: 1 if input_line_pointer->end-of-line.
3227 is_it_end_of_statement ()
3230 return (is_end_of_line[(unsigned char) *input_line_pointer]);
3231 } /* is_it_end_of_statement() */
3237 register symbolS *symbolP; /* symbol we are working with */
3239 input_line_pointer++;
3240 if (*input_line_pointer == '=')
3241 input_line_pointer++;
3243 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
3244 input_line_pointer++;
3246 if (sym_name[0] == '.' && sym_name[1] == '\0')
3248 /* Turn '. = mumble' into a .org mumble */
3249 register segT segment;
3252 segment = get_known_segmented_expression (&exp);
3254 do_org (segment, &exp, 0);
3258 symbolP = symbol_find_or_make (sym_name);
3259 pseudo_set (symbolP);
3263 /* .include -- include a file at this point. */
3276 filename = demand_copy_string (&i);
3277 demand_empty_rest_of_line ();
3278 path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ );
3279 for (i = 0; i < include_dir_count; i++)
3281 strcpy (path, include_dirs[i]);
3283 strcat (path, filename);
3284 if (0 != (try = fopen (path, "r")))
3293 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
3294 newbuf = input_scrub_include_file (path, input_line_pointer);
3295 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
3299 add_include_dir (path)
3304 if (include_dir_count == 0)
3306 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
3307 include_dirs[0] = "."; /* Current dir */
3308 include_dir_count = 2;
3312 include_dir_count++;
3313 include_dirs = (char **) realloc (include_dirs,
3314 include_dir_count * sizeof (*include_dirs));
3317 include_dirs[include_dir_count - 1] = path; /* New one */
3320 if (i > include_dir_maxlen)
3321 include_dir_maxlen = i;
3322 } /* add_include_dir() */
3328 while (!is_end_of_line[(unsigned char) *input_line_pointer])
3330 ++input_line_pointer;
3332 ++input_line_pointer;