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 static 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 */
313 {"offset", s_struct, 0},
315 {"p2align", s_align_ptwo, 0},
316 {"psize", listing_psize, 0}, /* set paper size */
319 {"sbttl", listing_title, 1}, /* Subtitle of listing */
324 {"single", float_cons, 'f'},
326 {"space", s_space, 0},
327 {"stabd", s_stab, 'd'},
328 {"stabn", s_stab, 'n'},
329 {"stabs", s_stab, 's'},
330 {"string", stringer, 1},
331 {"struct", s_struct, 0},
335 /* This is for gcc to use. It's only just been added (2/94), so gcc
336 won't be able to use it for a while -- probably a year or more.
337 But once this has been released, check with gcc maintainers
338 before deleting it or even changing the spelling. */
339 {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
340 /* If we're folding case -- done for some targets, not necessarily
341 all -- the above string in an input file will be converted to
342 this one. Match it either way... */
343 {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
345 {"title", listing_title, 0}, /* Listing title */
349 {"xdef", s_globl, 0},
350 {"xstabs", s_xstab, 's'},
352 {"zero", s_space, 0},
353 {NULL} /* end sentinel */
356 static int pop_override_ok = 0;
357 static const char *pop_table_name;
361 const pseudo_typeS *table;
364 const pseudo_typeS *pop;
365 for (pop = table; pop->poc_name; pop++)
367 errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop);
368 if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists")))
369 as_fatal ("error constructing %s pseudo-op table", pop_table_name);
373 #ifndef md_pop_insert
374 #define md_pop_insert() pop_insert(md_pseudo_table)
377 #ifndef obj_pop_insert
378 #define obj_pop_insert() pop_insert(obj_pseudo_table)
384 po_hash = hash_new ();
386 /* Do the target-specific pseudo ops. */
387 pop_table_name = "md";
390 /* Now object specific. Skip any that were in the target table. */
391 pop_table_name = "obj";
395 /* Now portable ones. Skip any that we've seen already. */
396 pop_table_name = "standard";
397 pop_insert (potable);
400 #define HANDLE_CONDITIONAL_ASSEMBLY() \
401 if (ignore_input ()) \
403 while (! is_end_of_line[(unsigned char) *input_line_pointer++]) \
404 if (input_line_pointer == buffer_limit) \
410 /* read_a_source_file()
412 * We read the file, putting things into a web that
413 * represents what we have been reading.
416 read_a_source_file (name)
420 register char *s; /* string of symbol, '\0' appended */
424 buffer = input_scrub_new_file (name);
427 listing_newline ("");
429 while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
430 { /* We have another line to parse. */
431 know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */
432 contin: /* JF this goto is my fault I admit it.
433 Someone brave please re-write the whole
434 input section here? Pleeze??? */
435 while (input_line_pointer < buffer_limit)
437 /* We have more of this buffer to parse. */
440 * We now have input_line_pointer->1st char of next line.
441 * If input_line_pointer [-1] == '\n' then we just
442 * scanned another line: so bump line counters.
444 if (is_end_of_line[(unsigned char) input_line_pointer[-1]])
446 #ifdef md_start_line_hook
447 md_start_line_hook ();
450 if (input_line_pointer[-1] == '\n')
451 bump_line_counters ();
454 #ifdef LABELS_WITHOUT_COLONS
459 mri_line_label = NULL;
461 /* Text at the start of a line must be a label, we
462 run down and stick a colon in. */
463 if (is_name_beginner (*input_line_pointer))
465 char *line_start = input_line_pointer;
466 char c = get_symbol_end ();
468 if (! ignore_input ())
470 /* In MRI mode, the EQU pseudoop must be
471 handled specially. */
474 if (((strncasecmp (input_line_pointer + 1,
476 || (strncasecmp (input_line_pointer + 1,
478 && (input_line_pointer[4] == ' '
479 || input_line_pointer[4] == '\t'))
481 input_line_pointer += 4;
487 mri_line_label = colon (line_start);
490 *input_line_pointer = c;
492 input_line_pointer++;
498 * We are at the begining of a line, or similar place.
499 * We expect a well-formed assembler statement.
500 * A "symbol-name:" is a statement.
502 * Depending on what compiler is used, the order of these tests
503 * may vary to catch most common case 1st.
504 * Each test is independent of all other tests at the (top) level.
505 * PLEASE make a compiler that doesn't use this assembler.
506 * It is crufty to waste a compiler's time encoding things for this
507 * assembler, which then wastes more time decoding it.
508 * (And communicating via (linear) files is silly!
509 * If you must pass stuff, please pass a tree!)
511 if ((c = *input_line_pointer++) == '\t'
516 c = *input_line_pointer++;
518 know (c != ' '); /* No further leading whitespace. */
521 * C is the 1st significant character.
522 * Input_line_pointer points after that character.
524 if (is_name_beginner (c))
526 /* want user-defined label or pseudo/opcode */
527 HANDLE_CONDITIONAL_ASSEMBLY ();
529 s = --input_line_pointer;
530 c = get_symbol_end (); /* name's delimiter */
532 * C is character after symbol.
533 * That character's place in the input line is now '\0'.
534 * S points to the beginning of the symbol.
535 * [In case of pseudo-op, s->'.'.]
536 * Input_line_pointer->'\0' where c was.
538 if (TC_START_LABEL(c, input_line_pointer))
540 colon (s); /* user-defined label */
541 *input_line_pointer++ = ':'; /* Put ':' back for error messages' sake. */
542 /* Input_line_pointer->after ':'. */
548 || (input_line_pointer[1] == '='
549 #ifdef TC_EQUAL_IN_INSN
550 && ! TC_EQUAL_IN_INSN (c, input_line_pointer)
555 demand_empty_rest_of_line ();
558 { /* expect pseudo-op or machine instruction */
561 #define IGNORE_OPCODE_CASE
562 #ifdef IGNORE_OPCODE_CASE
580 /* The MRI assembler and the m88k use pseudo-ops
582 pop = (pseudo_typeS *) hash_find (po_hash, s);
583 if (pop != NULL && pop->poc_handler == NULL)
587 if (pop != NULL || *s == '.')
592 * WARNING: c has next char, which may be end-of-line.
593 * We lookup the pseudo-op table with s+1 because we
594 * already know that the pseudo-op begins with a '.'.
598 pop = (pseudo_typeS *) hash_find (po_hash, s + 1);
600 /* In MRI mode, we may need to insert an
601 automatic alignment directive. What a hack
603 if (mri_pending_align
605 || ! ((pop->poc_handler == cons
606 && pop->poc_val == 1)
607 || (pop->poc_handler == s_space
608 && pop->poc_val == 1))))
610 do_align (1, (char *) NULL);
611 mri_pending_align = 0;
614 /* Print the error msg now, while we still can */
617 as_bad ("Unknown pseudo-op: `%s'", s);
618 *input_line_pointer = c;
623 /* Put it back for error messages etc. */
624 *input_line_pointer = c;
625 /* The following skip of whitespace is compulsory.
626 A well shaped space is sometimes all that separates
627 keyword from operands. */
628 if (c == ' ' || c == '\t')
629 input_line_pointer++;
631 * Input_line is restored.
632 * Input_line_pointer->1st non-blank char
633 * after pseudo-operation.
635 (*pop->poc_handler) (pop->poc_val);
637 /* If that was .end, just get out now. */
638 if (pop->poc_handler == s_end)
642 { /* machine instruction */
643 if (mri_pending_align)
645 do_align (1, (char *) NULL);
646 mri_pending_align = 0;
649 /* WARNING: c has char, which may be end-of-line. */
650 /* Also: input_line_pointer->`\0` where c was. */
651 *input_line_pointer = c;
652 while (!is_end_of_line[(unsigned char) *input_line_pointer]
653 #ifdef TC_EOL_IN_INSN
654 || TC_EOL_IN_INSN (input_line_pointer)
658 input_line_pointer++;
661 c = *input_line_pointer;
662 *input_line_pointer = '\0';
664 #ifdef OBJ_GENERATE_ASM_LINENO
665 if (generate_asm_lineno == 0)
667 if (ecoff_no_current_file ())
668 generate_asm_lineno = 1;
670 if (generate_asm_lineno == 1)
675 as_where (&s, &lineno);
676 OBJ_GENERATE_ASM_LINENO (s, lineno);
680 md_assemble (s); /* Assemble 1 instruction. */
682 *input_line_pointer++ = c;
684 /* We resume loop AFTER the end-of-line from
689 } /* if (is_name_beginner(c) */
692 /* Empty statement? */
693 if (is_end_of_line[(unsigned char) c])
696 if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB)
699 /* local label ("4:") */
700 char *backup = input_line_pointer;
702 HANDLE_CONDITIONAL_ASSEMBLY ();
706 while (isdigit (*input_line_pointer))
708 temp = (temp * 10) + *input_line_pointer - '0';
709 ++input_line_pointer;
710 } /* read the whole number */
712 if (LOCAL_LABELS_DOLLAR
713 && *input_line_pointer == '$'
714 && *(input_line_pointer + 1) == ':')
716 input_line_pointer += 2;
718 if (dollar_label_defined (temp))
720 as_fatal ("label \"%d$\" redefined", temp);
723 define_dollar_label (temp);
724 colon (dollar_label_name (temp, 0));
729 && *input_line_pointer++ == ':')
731 fb_label_instance_inc (temp);
732 colon (fb_label_name (temp, 0));
736 input_line_pointer = backup;
737 } /* local label ("4:") */
739 if (c && strchr (line_comment_chars, c))
740 { /* Its a comment. Better say APP or NO_APP */
744 unsigned int new_length;
746 extern char *scrub_string, *scrub_last_string;
748 bump_line_counters ();
749 s = input_line_pointer;
750 if (strncmp (s, "APP\n", 4))
751 continue; /* We ignore it */
754 ends = strstr (s, "#NO_APP\n");
758 unsigned int tmp_len;
761 /* The end of the #APP wasn't in this buffer. We
762 keep reading in buffers until we find the #NO_APP
763 that goes with this #APP There is one. The specs
765 tmp_len = buffer_limit - s;
766 tmp_buf = xmalloc (tmp_len + 1);
767 memcpy (tmp_buf, s, tmp_len);
770 new_tmp = input_scrub_next_buffer (&buffer);
774 buffer_limit = new_tmp;
775 input_line_pointer = buffer;
776 ends = strstr (buffer, "#NO_APP\n");
780 num = buffer_limit - buffer;
782 tmp_buf = xrealloc (tmp_buf, tmp_len + num);
783 memcpy (tmp_buf + tmp_len, buffer, num);
788 input_line_pointer = ends ? ends + 8 : NULL;
796 input_line_pointer = ends + 8;
798 new_buf = xmalloc (100);
803 scrub_last_string = ends;
808 ch = do_scrub_next_char (scrub_from_string, scrub_to_string);
812 if (new_tmp == new_buf + new_length)
814 new_buf = xrealloc (new_buf, new_length + 100);
815 new_tmp = new_buf + new_length;
823 old_input = input_line_pointer;
824 old_limit = buffer_limit;
826 input_line_pointer = new_buf;
827 buffer_limit = new_tmp;
831 HANDLE_CONDITIONAL_ASSEMBLY ();
833 /* as_warn("Junk character %d.",c); Now done by ignore_rest */
834 input_line_pointer--; /* Report unknown char as ignored. */
835 ignore_rest_of_line ();
836 } /* while (input_line_pointer<buffer_limit) */
838 #ifdef md_after_pass_hook
839 md_after_pass_hook ();
844 bump_line_counters ();
848 input_line_pointer = old_input;
849 buffer_limit = old_limit;
854 } /* while (more buffers to scan) */
857 input_scrub_close (); /* Close the input file */
864 as_fatal (".abort detected. Abandoning ship.");
867 /* Guts of .align directive. */
874 md_do_align (n, fill, just_record_alignment);
878 /* @@ Fix this right for BFD! */
880 static char nop_opcode = NOP_OPCODE;
882 if (now_seg != data_section && now_seg != bss_section)
891 /* Only make a frag if we HAVE to. . . */
892 if (n && !need_pass_2)
893 frag_align (n, *fill);
896 just_record_alignment:
899 record_alignment (now_seg, n);
902 /* For machines where ".align 4" means align to a 4 byte boundary. */
907 register unsigned int temp;
910 unsigned long max_alignment = 1 << 15;
912 if (is_end_of_line[(unsigned char) *input_line_pointer])
913 temp = arg; /* Default value from pseudo-op table */
915 temp = get_absolute_expression ();
917 if (temp > max_alignment)
919 as_bad ("Alignment too large: %d. assumed.", temp = max_alignment);
922 /* For the sparc, `.align (1<<n)' actually means `.align n' so we
923 have to convert it. */
926 for (i = 0; (temp & 1) == 0; temp >>= 1, ++i)
930 as_bad ("Alignment not a power of 2");
933 if (*input_line_pointer == ',')
935 input_line_pointer++;
936 temp_fill = get_absolute_expression ();
937 do_align (temp, &temp_fill);
940 do_align (temp, (char *) 0);
942 demand_empty_rest_of_line ();
945 /* For machines where ".align 4" means align to 2**4 boundary. */
947 s_align_ptwo (ignore)
952 long max_alignment = 15;
954 temp = get_absolute_expression ();
955 if (temp > max_alignment)
956 as_bad ("Alignment too large: %d. assumed.", temp = max_alignment);
959 as_bad ("Alignment negative. 0 assumed.");
962 if (*input_line_pointer == ',')
964 input_line_pointer++;
965 temp_fill = get_absolute_expression ();
966 do_align (temp, &temp_fill);
969 do_align (temp, (char *) 0);
971 demand_empty_rest_of_line ();
982 register symbolS *symbolP;
984 name = input_line_pointer;
985 c = get_symbol_end ();
986 /* just after name is now '\0' */
987 p = input_line_pointer;
990 if (*input_line_pointer != ',')
992 as_bad ("Expected comma after symbol-name: rest of line ignored.");
993 ignore_rest_of_line ();
996 input_line_pointer++; /* skip ',' */
997 if ((temp = get_absolute_expression ()) < 0)
999 as_warn (".COMMon length (%ld.) <0! Ignored.", (long) temp);
1000 ignore_rest_of_line ();
1004 symbolP = symbol_find_or_make (name);
1006 if (S_IS_DEFINED (symbolP))
1008 as_bad ("Ignoring attempt to re-define symbol `%s'.",
1009 S_GET_NAME (symbolP));
1010 ignore_rest_of_line ();
1013 if (S_GET_VALUE (symbolP))
1015 if (S_GET_VALUE (symbolP) != (valueT) temp)
1016 as_bad ("Length of .comm \"%s\" is already %ld. Not changed to %ld.",
1017 S_GET_NAME (symbolP),
1018 (long) S_GET_VALUE (symbolP),
1023 S_SET_VALUE (symbolP, (valueT) temp);
1024 S_SET_EXTERNAL (symbolP);
1028 extern int flag_one;
1029 if ( (!temp) || !flag_one)
1030 S_GET_OTHER(symbolP) = const_flag;
1032 #endif /* not OBJ_VMS */
1033 know (symbolP->sy_frag == &zero_address_frag);
1034 demand_empty_rest_of_line ();
1037 /* The MRI COMMON pseudo-op. We handle this by creating a common
1038 symbol with the appropriate name. We make s_space do the right
1039 thing by increasing the size. */
1042 s_mri_common (small)
1059 name = input_line_pointer;
1060 if (! isdigit ((unsigned char) *name))
1061 c = get_symbol_end ();
1066 ++input_line_pointer;
1068 while (isdigit ((unsigned char) *input_line_pointer));
1069 c = *input_line_pointer;
1070 *input_line_pointer = '\0';
1072 if (mri_line_label != NULL)
1074 alc = (char *) xmalloc (strlen (S_GET_NAME (mri_line_label))
1075 + (input_line_pointer - name)
1077 sprintf (alc, "%s%s", name, S_GET_NAME (mri_line_label));
1082 sym = symbol_find_or_make (name);
1083 *input_line_pointer = c;
1087 if (*input_line_pointer != ',')
1091 ++input_line_pointer;
1092 align = get_absolute_expression ();
1095 if (S_IS_DEFINED (sym))
1097 #if defined (S_IS_COMMON) || defined (BFD_ASSEMBLER)
1098 if (! S_IS_COMMON (sym))
1101 as_bad ("attempt to re-define symbol `%s'", S_GET_NAME (sym));
1102 ignore_rest_of_line ();
1107 S_SET_EXTERNAL (sym);
1108 mri_common_symbol = sym;
1112 S_SET_ALIGN (sym, align);
1115 if (mri_line_label != NULL)
1117 mri_line_label->sy_value.X_op = O_symbol;
1118 mri_line_label->sy_value.X_add_symbol = sym;
1119 mri_line_label->sy_value.X_add_number = S_GET_VALUE (sym);
1120 mri_line_label->sy_frag = &zero_address_frag;
1121 S_SET_SEGMENT (mri_line_label, expr_section);
1124 /* FIXME: We just ignore the small argument, which distinguishes
1125 COMMON and COMMON.S. I don't know what we can do about it. */
1127 /* Ignore the type and hptype. */
1128 if (*input_line_pointer == ',')
1129 input_line_pointer += 2;
1130 if (*input_line_pointer == ',')
1131 input_line_pointer += 2;
1132 demand_empty_rest_of_line ();
1142 temp = get_absolute_expression ();
1143 if (flag_readonly_data_in_text)
1145 section = text_section;
1149 section = data_section;
1151 subseg_set (section, (subsegT) temp);
1156 demand_empty_rest_of_line ();
1159 /* Handle the .appfile pseudo-op. This is automatically generated by
1160 do_scrub_next_char when a preprocessor # line comment is seen with
1161 a file name. This default definition may be overridden by the
1162 object or CPU specific pseudo-ops. This function is also the
1163 default definition for .file; the APPFILE argument is 1 for
1164 .appfile, 0 for .file. */
1167 s_app_file (appfile)
1173 /* Some assemblers tolerate immediately following '"' */
1174 if ((s = demand_copy_string (&length)) != 0)
1176 /* If this is a fake .appfile, a fake newline was inserted into
1177 the buffer. Passing -2 to new_logical_line tells it to
1179 new_logical_line (s, appfile ? -2 : -1);
1180 demand_empty_rest_of_line ();
1183 listing_source_file (s);
1191 /* Handle the .appline pseudo-op. This is automatically generated by
1192 do_scrub_next_char when a preprocessor # line comment is seen.
1193 This default definition may be overridden by the object or CPU
1194 specific pseudo-ops. */
1202 /* The given number is that of the next line. */
1203 l = get_absolute_expression () - 1;
1205 /* Some of the back ends can't deal with non-positive line numbers.
1206 Besides, it's silly. */
1207 as_warn ("Line numbers must be positive; line number %d rejected.", l+1);
1210 new_logical_line ((char *) NULL, l);
1213 listing_source_line (l);
1216 demand_empty_rest_of_line ();
1219 /* Handle the .end pseudo-op. Actually, the real work is done in
1220 read_a_source_file. */
1228 /* The MRI assembler permits the start symbol to follow .end,
1229 but we don't support that. */
1231 if (! is_end_of_line[(unsigned char) *input_line_pointer])
1232 as_warn ("start address not supported");
1236 /* Handle the MRI fail pseudo-op. */
1244 temp = get_absolute_expression ();
1246 as_warn (".fail %ld encountered", (long) temp);
1248 as_bad (".fail %ld encountered", (long) temp);
1249 demand_empty_rest_of_line ();
1256 long temp_repeat = 0;
1258 register long temp_fill = 0;
1262 temp_repeat = get_absolute_expression ();
1263 if (*input_line_pointer == ',')
1265 input_line_pointer++;
1266 temp_size = get_absolute_expression ();
1267 if (*input_line_pointer == ',')
1269 input_line_pointer++;
1270 temp_fill = get_absolute_expression ();
1273 /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
1274 #define BSD_FILL_SIZE_CROCK_8 (8)
1275 if (temp_size > BSD_FILL_SIZE_CROCK_8)
1277 as_warn (".fill size clamped to %d.", BSD_FILL_SIZE_CROCK_8);
1278 temp_size = BSD_FILL_SIZE_CROCK_8;
1282 as_warn ("Size negative: .fill ignored.");
1285 else if (temp_repeat <= 0)
1287 as_warn ("Repeat < 0, .fill ignored");
1291 if (temp_size && !need_pass_2)
1293 p = frag_var (rs_fill, (int) temp_size, (int) temp_size, (relax_substateT) 0, (symbolS *) 0, temp_repeat, (char *) 0);
1294 memset (p, 0, (unsigned int) temp_size);
1295 /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
1296 * flavoured AS. The following bizzare behaviour is to be
1297 * compatible with above. I guess they tried to take up to 8
1298 * bytes from a 4-byte expression and they forgot to sign
1299 * extend. Un*x Sux. */
1300 #define BSD_FILL_SIZE_CROCK_4 (4)
1301 md_number_to_chars (p, (valueT) temp_fill,
1302 (temp_size > BSD_FILL_SIZE_CROCK_4
1303 ? BSD_FILL_SIZE_CROCK_4
1304 : (int) temp_size));
1305 /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
1306 * but emits no error message because it seems a legal thing to do.
1307 * It is a degenerate case of .fill but could be emitted by a compiler.
1310 demand_empty_rest_of_line ();
1323 name = input_line_pointer;
1324 c = get_symbol_end ();
1325 symbolP = symbol_find_or_make (name);
1326 *input_line_pointer = c;
1328 S_SET_EXTERNAL (symbolP);
1331 input_line_pointer++;
1333 if (*input_line_pointer == '\n')
1338 demand_empty_rest_of_line ();
1342 s_lcomm (needs_align)
1343 /* 1 if this was a ".bss" directive, which may require a 3rd argument
1344 (alignment); 0 if it was an ".lcomm" (2 args only) */
1347 register char *name;
1351 register symbolS *symbolP;
1352 segT current_seg = now_seg;
1353 subsegT current_subseg = now_subseg;
1354 const int max_alignment = 15;
1356 segT bss_seg = bss_section;
1358 name = input_line_pointer;
1359 c = get_symbol_end ();
1360 p = input_line_pointer;
1364 /* Accept an optional comma after the name. The comma used to be
1365 required, but Irix 5 cc does not generate it. */
1366 if (*input_line_pointer == ',')
1368 ++input_line_pointer;
1372 if (*input_line_pointer == '\n')
1374 as_bad ("Missing size expression");
1378 if ((temp = get_absolute_expression ()) < 0)
1380 as_warn ("BSS length (%d.) <0! Ignored.", temp);
1381 ignore_rest_of_line ();
1385 #if defined (TC_MIPS) || defined (TC_ALPHA)
1386 if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
1387 || OUTPUT_FLAVOR == bfd_target_elf_flavour)
1389 /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
1390 if (temp <= bfd_get_gp_size (stdoutput))
1392 bss_seg = subseg_new (".sbss", 1);
1393 seg_info (bss_seg)->bss = 1;
1399 /* FIXME. This needs to be machine independent. */
1409 record_alignment(bss_seg, align);
1416 if (*input_line_pointer != ',')
1418 as_bad ("Expected comma after size");
1419 ignore_rest_of_line ();
1422 input_line_pointer++;
1424 if (*input_line_pointer == '\n')
1426 as_bad ("Missing alignment");
1429 align = get_absolute_expression ();
1430 if (align > max_alignment)
1432 align = max_alignment;
1433 as_warn ("Alignment too large: %d. assumed.", align);
1438 as_warn ("Alignment negative. 0 assumed.");
1440 record_alignment (bss_seg, align);
1441 } /* if needs align */
1444 /* Assume some objects may require alignment on some systems. */
1448 align = ffs (temp) - 1;
1449 if (temp % (1 << align))
1456 symbolP = symbol_find_or_make (name);
1460 #if defined(OBJ_AOUT) | defined(OBJ_BOUT)
1461 S_GET_OTHER (symbolP) == 0 &&
1462 S_GET_DESC (symbolP) == 0 &&
1463 #endif /* OBJ_AOUT or OBJ_BOUT */
1464 (S_GET_SEGMENT (symbolP) == bss_seg
1465 || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0)))
1469 subseg_set (bss_seg, 1);
1472 frag_align (align, 0);
1473 /* detach from old frag */
1474 if (S_GET_SEGMENT (symbolP) == bss_seg)
1475 symbolP->sy_frag->fr_symbol = NULL;
1477 symbolP->sy_frag = frag_now;
1478 pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP,
1482 S_SET_SEGMENT (symbolP, bss_seg);
1485 /* The symbol may already have been created with a preceding
1486 ".globl" directive -- be careful not to step on storage class
1487 in that case. Otherwise, set it to static. */
1488 if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
1490 S_SET_STORAGE_CLASS (symbolP, C_STAT);
1492 #endif /* OBJ_COFF */
1495 as_bad ("Ignoring attempt to re-define symbol `%s'.",
1496 S_GET_NAME (symbolP));
1498 subseg_set (current_seg, current_subseg);
1500 demand_empty_rest_of_line ();
1507 register char *name;
1511 register symbolS *symbolP;
1513 /* we permit ANY defined expression: BSD4.2 demands constants */
1514 name = input_line_pointer;
1515 c = get_symbol_end ();
1516 p = input_line_pointer;
1519 if (*input_line_pointer != ',')
1522 as_bad ("Expected comma after name \"%s\"", name);
1524 ignore_rest_of_line ();
1527 input_line_pointer++;
1529 if (exp.X_op != O_constant
1530 && exp.X_op != O_register)
1532 as_bad ("bad expression");
1533 ignore_rest_of_line ();
1537 symbolP = symbol_find_or_make (name);
1539 /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 &&
1540 symbolP->sy_desc == 0) out of this test because coff doesn't have
1541 those fields, and I can't see when they'd ever be tripped. I
1542 don't think I understand why they were here so I may have
1543 introduced a bug. As recently as 1.37 didn't have this test
1544 anyway. xoxorich. */
1546 if (S_GET_SEGMENT (symbolP) == undefined_section
1547 && S_GET_VALUE (symbolP) == 0)
1549 /* The name might be an undefined .global symbol; be sure to
1550 keep the "external" bit. */
1551 S_SET_SEGMENT (symbolP,
1552 (exp.X_op == O_constant
1555 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
1559 as_bad ("Symbol %s already defined", name);
1562 demand_empty_rest_of_line ();
1565 /* Handle changing the location counter. */
1568 do_org (segment, exp, fill)
1573 if (segment != now_seg && segment != absolute_section)
1574 as_bad ("invalid segment \"%s\"; segment \"%s\" assumed",
1575 segment_name (segment), segment_name (now_seg));
1577 if (now_seg == absolute_section)
1580 as_warn ("ignoring fill value in absolute section");
1581 if (exp->X_op != O_constant)
1583 as_bad ("only constant offsets supported in absolute section");
1584 exp->X_add_number = 0;
1586 abs_section_offset = exp->X_add_number;
1592 p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp->X_add_symbol,
1593 exp->X_add_number, (char *) NULL);
1602 register segT segment;
1604 register long temp_fill;
1606 /* Don't believe the documentation of BSD 4.2 AS. There is no such
1607 thing as a sub-segment-relative origin. Any absolute origin is
1608 given a warning, then assumed to be segment-relative. Any
1609 segmented origin expression ("foo+42") had better be in the right
1610 segment or the .org is ignored.
1612 BSD 4.2 AS warns if you try to .org backwards. We cannot because
1613 we never know sub-segment sizes when we are reading code. BSD
1614 will crash trying to emit negative numbers of filler bytes in
1615 certain .orgs. We don't crash, but see as-write for that code.
1617 Don't make frag if need_pass_2==1. */
1618 segment = get_known_segmented_expression (&exp);
1619 if (*input_line_pointer == ',')
1621 input_line_pointer++;
1622 temp_fill = get_absolute_expression ();
1628 do_org (segment, &exp, temp_fill);
1630 demand_empty_rest_of_line ();
1637 register char *name;
1638 register char delim;
1639 register char *end_name;
1640 register symbolS *symbolP;
1643 * Especial apologies for the random logic:
1644 * this just grew, and could be parsed much more simply!
1647 name = input_line_pointer;
1648 delim = get_symbol_end ();
1649 end_name = input_line_pointer;
1653 if (*input_line_pointer != ',')
1656 as_bad ("Expected comma after name \"%s\"", name);
1658 ignore_rest_of_line ();
1662 input_line_pointer++;
1665 if (name[0] == '.' && name[1] == '\0')
1667 /* Turn '. = mumble' into a .org mumble */
1668 register segT segment;
1672 segment = get_known_segmented_expression (&exp);
1675 do_org (segment, &exp, 0);
1681 if ((symbolP = symbol_find (name)) == NULL
1682 && (symbolP = md_undefined_symbol (name)) == NULL)
1684 symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag);
1686 /* "set" symbols are local unless otherwise specified. */
1687 SF_SET_LOCAL (symbolP);
1688 #endif /* OBJ_COFF */
1690 } /* make a new symbol */
1692 symbol_table_insert (symbolP);
1695 pseudo_set (symbolP);
1696 demand_empty_rest_of_line ();
1707 #ifdef md_flush_pending_output
1708 md_flush_pending_output ();
1711 /* Just like .fill, but temp_size = 1 */
1713 if (exp.X_op == O_constant)
1717 repeat = exp.X_add_number;
1722 as_warn (".space repeat count is %s, ignored",
1723 repeat ? "negative" : "zero");
1724 ignore_rest_of_line ();
1728 /* If we are in the absolute section, just bump the offset. */
1729 if (now_seg == absolute_section)
1731 abs_section_offset += repeat;
1732 demand_empty_rest_of_line ();
1736 /* If we are secretly in an MRI common section, then creating
1737 space just increases the size of the common symbol. */
1738 if (mri_common_symbol != NULL)
1740 S_SET_VALUE (mri_common_symbol,
1741 S_GET_VALUE (mri_common_symbol) + repeat);
1742 demand_empty_rest_of_line ();
1747 p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
1748 repeat, (char *) 0);
1752 if (now_seg == absolute_section)
1754 as_bad ("space allocation too complex in absolute section");
1755 subseg_set (text_section, 0);
1757 if (mri_common_symbol != NULL)
1759 as_bad ("space allocation too complex in common section");
1760 mri_common_symbol = NULL;
1763 p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
1764 make_expr_symbol (&exp), 0L, (char *) 0);
1767 if (*input_line_pointer == ',')
1769 input_line_pointer++;
1770 temp_fill = get_absolute_expression ();
1780 demand_empty_rest_of_line ();
1783 /* This is like s_space, but the value is a floating point number with
1784 the given precision. This is for the MRI dcb.s pseudo-op and
1788 s_float_space (float_type)
1793 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
1795 count = get_absolute_expression ();
1798 if (*input_line_pointer != ',')
1800 as_bad ("missing value");
1801 ignore_rest_of_line ();
1805 ++input_line_pointer;
1809 /* Skip any 0{letter} that may be present. Don't even check if the
1810 * letter is legal. */
1811 if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1]))
1812 input_line_pointer += 2;
1814 /* Accept :xxxx, where the x's are hex digits, for a floating point
1815 with the exact digits specified. */
1816 if (input_line_pointer[0] == ':')
1818 flen = hex_float (float_type, temp);
1821 ignore_rest_of_line ();
1829 err = md_atof (float_type, temp, &flen);
1830 know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
1834 as_bad ("Bad floating literal: %s", err);
1835 ignore_rest_of_line ();
1840 while (--count >= 0)
1844 p = frag_more (flen);
1845 memcpy (p, temp, (unsigned int) flen);
1848 demand_empty_rest_of_line ();
1851 /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
1857 abs_section_offset = get_absolute_expression ();
1858 subseg_set (absolute_section, 0);
1859 demand_empty_rest_of_line ();
1868 temp = get_absolute_expression ();
1869 subseg_set (text_section, (subsegT) temp);
1870 demand_empty_rest_of_line ();
1872 const_flag &= ~IN_DEFAULT_SECTION;
1878 demand_empty_rest_of_line ()
1881 if (is_end_of_line[(unsigned char) *input_line_pointer])
1883 input_line_pointer++;
1887 ignore_rest_of_line ();
1889 /* Return having already swallowed end-of-line. */
1890 } /* Return pointing just after end-of-line. */
1893 ignore_rest_of_line () /* For suspect lines: gives warning. */
1895 if (!is_end_of_line[(unsigned char) *input_line_pointer])
1897 if (isprint (*input_line_pointer))
1898 as_bad ("Rest of line ignored. First ignored character is `%c'.",
1899 *input_line_pointer);
1901 as_bad ("Rest of line ignored. First ignored character valued 0x%x.",
1902 *input_line_pointer);
1903 while (input_line_pointer < buffer_limit
1904 && !is_end_of_line[(unsigned char) *input_line_pointer])
1906 input_line_pointer++;
1909 input_line_pointer++; /* Return pointing just after end-of-line. */
1910 know (is_end_of_line[(unsigned char) input_line_pointer[-1]]);
1916 * In: Pointer to a symbol.
1917 * Input_line_pointer->expression.
1919 * Out: Input_line_pointer->just after any whitespace after expression.
1920 * Tried to set symbol to value of expression.
1921 * Will change symbols type, value, and frag;
1924 pseudo_set (symbolP)
1928 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
1930 #endif /* OBJ_AOUT or OBJ_BOUT */
1932 know (symbolP); /* NULL pointer is logic error. */
1933 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
1934 ext = S_IS_EXTERNAL (symbolP);
1935 #endif /* OBJ_AOUT or OBJ_BOUT */
1937 (void) expression (&exp);
1939 if (exp.X_op == O_illegal)
1940 as_bad ("illegal expression; zero assumed");
1941 else if (exp.X_op == O_absent)
1942 as_bad ("missing expression; zero assumed");
1943 else if (exp.X_op == O_big)
1944 as_bad ("%s number invalid; zero assumed",
1945 exp.X_add_number > 0 ? "bignum" : "floating point");
1946 else if (exp.X_op == O_subtract
1947 && (S_GET_SEGMENT (exp.X_add_symbol)
1948 == S_GET_SEGMENT (exp.X_op_symbol))
1949 && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
1950 && exp.X_add_symbol->sy_frag == exp.X_op_symbol->sy_frag)
1952 exp.X_op = O_constant;
1953 exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
1954 - S_GET_VALUE (exp.X_op_symbol));
1962 exp.X_add_number = 0;
1965 S_SET_SEGMENT (symbolP, absolute_section);
1966 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
1968 S_SET_EXTERNAL (symbolP);
1970 S_CLEAR_EXTERNAL (symbolP);
1971 #endif /* OBJ_AOUT or OBJ_BOUT */
1972 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
1973 symbolP->sy_frag = &zero_address_frag;
1977 S_SET_SEGMENT (symbolP, reg_section);
1978 S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
1979 symbolP->sy_frag = &zero_address_frag;
1983 if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section
1984 || exp.X_add_number != 0)
1985 symbolP->sy_value = exp;
1988 symbolS *s = exp.X_add_symbol;
1990 S_SET_SEGMENT (symbolP, S_GET_SEGMENT (s));
1991 #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER)
1993 S_SET_EXTERNAL (symbolP);
1995 S_CLEAR_EXTERNAL (symbolP);
1996 #endif /* OBJ_AOUT or OBJ_BOUT */
1997 S_SET_VALUE (symbolP,
1998 exp.X_add_number + S_GET_VALUE (s));
1999 symbolP->sy_frag = s->sy_frag;
2000 copy_symbol_attributes (symbolP, s);
2005 /* The value is some complex expression.
2006 FIXME: Should we set the segment to anything? */
2007 symbolP->sy_value = exp;
2015 * CONStruct more frag of .bytes, or .words etc.
2016 * Should need_pass_2 be 1 then emit no frag(s).
2017 * This understands EXPRESSIONS.
2021 * This has a split personality. We use expression() to read the
2022 * value. We can detect if the value won't fit in a byte or word.
2023 * But we can't detect if expression() discarded significant digits
2024 * in the case of a long. Not worth the crocks required to fix it.
2027 /* Select a parser for cons expressions. */
2029 /* Some targets need to parse the expression in various fancy ways.
2030 You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
2031 (for example, the HPPA does this). Otherwise, you can define
2032 BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or
2033 REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
2034 are defined, which is the normal case, then only simple expressions
2038 parse_mri_cons PARAMS ((expressionS *exp, unsigned int nbytes));
2040 #ifndef TC_PARSE_CONS_EXPRESSION
2041 #ifdef BITFIELD_CONS_EXPRESSIONS
2042 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES)
2044 parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes));
2046 #ifdef REPEAT_CONS_EXPRESSIONS
2047 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES)
2049 parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes));
2052 /* If we haven't gotten one yet, just call expression. */
2053 #ifndef TC_PARSE_CONS_EXPRESSION
2054 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP)
2058 /* worker to do .byte etc statements */
2059 /* clobbers input_line_pointer, checks */
2063 register int nbytes; /* 1=.byte, 2=.word, 4=.long */
2068 #ifdef md_flush_pending_output
2069 md_flush_pending_output ();
2072 if (is_it_end_of_statement ())
2074 demand_empty_rest_of_line ();
2082 parse_mri_cons (&exp, (unsigned int) nbytes);
2084 TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
2085 emit_expr (&exp, (unsigned int) nbytes);
2088 while (*input_line_pointer++ == ',');
2090 /* In MRI mode, after an odd number of bytes, we must align to an
2091 even word boundary, unless the next instruction is a dc.b, ds.b
2093 if (flag_mri && nbytes == 1 && (c & 1) != 0)
2094 mri_pending_align = 1;
2096 input_line_pointer--; /* Put terminator back into stream. */
2097 demand_empty_rest_of_line ();
2100 /* Put the contents of expression EXP into the object file using
2101 NBYTES bytes. If need_pass_2 is 1, this does nothing. */
2104 emit_expr (exp, nbytes)
2106 unsigned int nbytes;
2110 valueT extra_digit = 0;
2112 /* Don't do anything if we are going to make another pass. */
2118 /* Allow `.word 0' in the absolute section. */
2119 if (now_seg == absolute_section)
2121 if (op != O_constant || exp->X_add_number != 0)
2122 as_bad ("attempt to store value in absolute section");
2123 abs_section_offset += nbytes;
2127 /* Handle a negative bignum. */
2129 && exp->X_add_number == 0
2130 && exp->X_add_symbol->sy_value.X_op == O_big
2131 && exp->X_add_symbol->sy_value.X_add_number > 0)
2134 unsigned long carry;
2136 exp = &exp->X_add_symbol->sy_value;
2138 /* Negate the bignum: one's complement each digit and add 1. */
2140 for (i = 0; i < exp->X_add_number; i++)
2144 next = (((~ (generic_bignum[i] & LITTLENUM_MASK))
2147 generic_bignum[i] = next & LITTLENUM_MASK;
2148 carry = next >> LITTLENUM_NUMBER_OF_BITS;
2151 /* We can ignore any carry out, because it will be handled by
2152 extra_digit if it is needed. */
2154 extra_digit = (valueT) -1;
2158 if (op == O_absent || op == O_illegal)
2160 as_warn ("zero assumed for missing expression");
2161 exp->X_add_number = 0;
2164 else if (op == O_big && exp->X_add_number <= 0)
2166 as_bad ("floating point number invalid; zero assumed");
2167 exp->X_add_number = 0;
2170 else if (op == O_register)
2172 as_warn ("register value used as expression");
2176 p = frag_more ((int) nbytes);
2178 #ifndef WORKING_DOT_WORD
2179 /* If we have the difference of two symbols in a word, save it on
2180 the broken_words list. See the code in write.c. */
2181 if (op == O_subtract && nbytes == 2)
2183 struct broken_word *x;
2185 x = (struct broken_word *) xmalloc (sizeof (struct broken_word));
2186 x->next_broken_word = broken_words;
2189 x->word_goes_here = p;
2191 x->add = exp->X_add_symbol;
2192 x->sub = exp->X_op_symbol;
2193 x->addnum = exp->X_add_number;
2200 /* If we have an integer, but the number of bytes is too large to
2201 pass to md_number_to_chars, handle it as a bignum. */
2202 if (op == O_constant && nbytes > sizeof (valueT))
2207 if (! exp->X_unsigned && exp->X_add_number < 0)
2208 extra_digit = (valueT) -1;
2209 val = (valueT) exp->X_add_number;
2213 generic_bignum[gencnt] = val & LITTLENUM_MASK;
2214 val >>= LITTLENUM_NUMBER_OF_BITS;
2218 op = exp->X_op = O_big;
2219 exp->X_add_number = gencnt;
2222 if (op == O_constant)
2224 register valueT get;
2225 register valueT use;
2226 register valueT mask;
2227 register valueT unmask;
2229 /* JF << of >= number of bits in the object is undefined. In
2230 particular SPARC (Sun 4) has problems */
2231 if (nbytes >= sizeof (valueT))
2234 mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes); /* Don't store these bits. */
2236 unmask = ~mask; /* Do store these bits. */
2239 "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
2240 mask = ~(unmask >> 1); /* Includes sign bit now. */
2243 get = exp->X_add_number;
2245 if ((get & mask) != 0 && (get & mask) != mask)
2246 { /* Leading bits contain both 0s & 1s. */
2247 as_warn ("Value 0x%lx truncated to 0x%lx.", get, use);
2249 /* put bytes in right order. */
2250 md_number_to_chars (p, use, (int) nbytes);
2252 else if (op == O_big)
2255 LITTLENUM_TYPE *nums;
2257 know (nbytes % CHARS_PER_LITTLENUM == 0);
2259 size = exp->X_add_number * CHARS_PER_LITTLENUM;
2262 as_warn ("Bignum truncated to %d bytes", nbytes);
2266 if (target_big_endian)
2268 while (nbytes > size)
2270 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
2271 nbytes -= CHARS_PER_LITTLENUM;
2272 p += CHARS_PER_LITTLENUM;
2275 nums = generic_bignum + size / CHARS_PER_LITTLENUM;
2279 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
2280 size -= CHARS_PER_LITTLENUM;
2281 p += CHARS_PER_LITTLENUM;
2286 nums = generic_bignum;
2289 md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
2291 size -= CHARS_PER_LITTLENUM;
2292 p += CHARS_PER_LITTLENUM;
2293 nbytes -= CHARS_PER_LITTLENUM;
2298 md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
2299 nbytes -= CHARS_PER_LITTLENUM;
2300 p += CHARS_PER_LITTLENUM;
2306 memset (p, 0, nbytes);
2308 /* Now we need to generate a fixS to record the symbol value.
2309 This is easy for BFD. For other targets it can be more
2310 complex. For very complex cases (currently, the HPPA and
2311 NS32K), you can define TC_CONS_FIX_NEW to do whatever you
2312 want. For simpler cases, you can define TC_CONS_RELOC to be
2313 the name of the reloc code that should be stored in the fixS.
2314 If neither is defined, the code uses NO_RELOC if it is
2315 defined, and otherwise uses 0. */
2317 #ifdef BFD_ASSEMBLER
2318 #ifdef TC_CONS_FIX_NEW
2319 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
2321 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0,
2322 /* @@ Should look at CPU word size. */
2323 nbytes == 2 ? BFD_RELOC_16
2324 : nbytes == 8 ? BFD_RELOC_64
2328 #ifdef TC_CONS_FIX_NEW
2329 TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
2331 /* Figure out which reloc number to use. Use TC_CONS_RELOC if
2332 it is defined, otherwise use NO_RELOC if it is defined,
2334 #ifndef TC_CONS_RELOC
2336 #define TC_CONS_RELOC NO_RELOC
2338 #define TC_CONS_RELOC 0
2341 fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0,
2343 #endif /* TC_CONS_FIX_NEW */
2344 #endif /* BFD_ASSEMBLER */
2348 #ifdef BITFIELD_CONS_EXPRESSIONS
2350 /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as
2351 w:x,y:z, where w and y are bitwidths and x and y are values. They
2352 then pack them all together. We do a little better in that we allow
2353 them in words, longs, etc. and we'll pack them in target byte order
2356 The rules are: pack least significat bit first, if a field doesn't
2357 entirely fit, put it in the next unit. Overflowing the bitfield is
2358 explicitly *not* even a warning. The bitwidth should be considered
2361 To use this function the tc-XXX.h file should define
2362 BITFIELD_CONS_EXPRESSIONS. */
2365 parse_bitfield_cons (exp, nbytes)
2367 unsigned int nbytes;
2369 unsigned int bits_available = BITS_PER_CHAR * nbytes;
2370 char *hold = input_line_pointer;
2372 (void) expression (exp);
2374 if (*input_line_pointer == ':')
2380 unsigned long width;
2382 if (*input_line_pointer != ':')
2384 input_line_pointer = hold;
2386 } /* next piece is not a bitfield */
2388 /* In the general case, we can't allow
2389 full expressions with symbol
2390 differences and such. The relocation
2391 entries for symbols not defined in this
2392 assembly would require arbitrary field
2393 widths, positions, and masks which most
2394 of our current object formats don't
2397 In the specific case where a symbol
2398 *is* defined in this assembly, we
2399 *could* build fixups and track it, but
2400 this could lead to confusion for the
2401 backends. I'm lazy. I'll take any
2402 SEG_ABSOLUTE. I think that means that
2403 you can use a previous .set or
2404 .equ type symbol. xoxorich. */
2406 if (exp->X_op == O_absent)
2408 as_warn ("using a bit field width of zero");
2409 exp->X_add_number = 0;
2410 exp->X_op = O_constant;
2411 } /* implied zero width bitfield */
2413 if (exp->X_op != O_constant)
2415 *input_line_pointer = '\0';
2416 as_bad ("field width \"%s\" too complex for a bitfield", hold);
2417 *input_line_pointer = ':';
2418 demand_empty_rest_of_line ();
2422 if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes))
2424 as_warn ("field width %lu too big to fit in %d bytes: truncated to %d bits",
2425 width, nbytes, (BITS_PER_CHAR * nbytes));
2426 width = BITS_PER_CHAR * nbytes;
2429 if (width > bits_available)
2431 /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */
2432 input_line_pointer = hold;
2433 exp->X_add_number = value;
2437 hold = ++input_line_pointer; /* skip ':' */
2439 (void) expression (exp);
2440 if (exp->X_op != O_constant)
2442 char cache = *input_line_pointer;
2444 *input_line_pointer = '\0';
2445 as_bad ("field value \"%s\" too complex for a bitfield", hold);
2446 *input_line_pointer = cache;
2447 demand_empty_rest_of_line ();
2451 value |= ((~(-1 << width) & exp->X_add_number)
2452 << ((BITS_PER_CHAR * nbytes) - bits_available));
2454 if ((bits_available -= width) == 0
2455 || is_it_end_of_statement ()
2456 || *input_line_pointer != ',')
2459 } /* all the bitfields we're gonna get */
2461 hold = ++input_line_pointer;
2462 (void) expression (exp);
2463 } /* forever loop */
2465 exp->X_add_number = value;
2466 exp->X_op = O_constant;
2467 exp->X_unsigned = 1;
2468 } /* if looks like a bitfield */
2469 } /* parse_bitfield_cons() */
2471 #endif /* BITFIELD_CONS_EXPRESSIONS */
2473 /* Handle an MRI style string expression. */
2476 parse_mri_cons (exp, nbytes)
2478 unsigned int nbytes;
2480 if (*input_line_pointer != '\''
2481 && (input_line_pointer[1] != '\''
2482 || (*input_line_pointer != 'A'
2483 && *input_line_pointer != 'E')))
2484 TC_PARSE_CONS_EXPRESSION (exp, nbytes);
2488 unsigned int result = 0;
2490 /* An MRI style string. Cut into as many bytes as will fit into
2491 a nbyte chunk, left justify if necessary, and separate with
2492 commas so we can try again later. */
2493 if (*input_line_pointer == 'A')
2494 ++input_line_pointer;
2495 else if (*input_line_pointer == 'E')
2497 as_bad ("EBCDIC constants are not supported");
2498 ++input_line_pointer;
2501 input_line_pointer++;
2502 for (scan = 0; scan < nbytes; scan++)
2504 if (*input_line_pointer == '\'')
2506 if (input_line_pointer[1] == '\'')
2508 input_line_pointer++;
2513 result = (result << 8) | (*input_line_pointer++);
2517 while (scan < nbytes)
2522 /* Create correct expression */
2523 exp->X_op = O_constant;
2524 exp->X_add_number = result;
2525 /* Fake it so that we can read the next char too */
2526 if (input_line_pointer[0] != '\'' ||
2527 (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
2529 input_line_pointer -= 2;
2530 input_line_pointer[0] = ',';
2531 input_line_pointer[1] = '\'';
2534 input_line_pointer++;
2538 #ifdef REPEAT_CONS_EXPRESSIONS
2540 /* Parse a repeat expression for cons. This is used by the MIPS
2541 assembler. The format is NUMBER:COUNT; NUMBER appears in the
2542 object file COUNT times.
2544 To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
2547 parse_repeat_cons (exp, nbytes)
2549 unsigned int nbytes;
2556 if (*input_line_pointer != ':')
2558 /* No repeat count. */
2562 ++input_line_pointer;
2563 expression (&count);
2564 if (count.X_op != O_constant
2565 || count.X_add_number <= 0)
2567 as_warn ("Unresolvable or nonpositive repeat count; using 1");
2571 /* The cons function is going to output this expression once. So we
2572 output it count - 1 times. */
2573 for (i = count.X_add_number - 1; i > 0; i--)
2574 emit_expr (exp, nbytes);
2577 #endif /* REPEAT_CONS_EXPRESSIONS */
2579 /* Parse a floating point number represented as a hex constant. This
2580 permits users to specify the exact bits they want in the floating
2584 hex_float (float_type, bytes)
2618 as_bad ("Unknown floating type type '%c'", float_type);
2622 /* It would be nice if we could go through expression to parse the
2623 hex constant, but if we get a bignum it's a pain to sort it into
2624 the buffer correctly. */
2626 while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
2630 /* The MRI assembler accepts arbitrary underscores strewn about
2631 through the hex constant, so we ignore them as well. */
2632 if (*input_line_pointer == '_')
2634 ++input_line_pointer;
2640 as_warn ("Floating point constant too large");
2643 d = hex_value (*input_line_pointer) << 4;
2644 ++input_line_pointer;
2645 while (*input_line_pointer == '_')
2646 ++input_line_pointer;
2647 if (hex_p (*input_line_pointer))
2649 d += hex_value (*input_line_pointer);
2650 ++input_line_pointer;
2656 memset (bytes + i, 0, length - i);
2664 * CONStruct some more frag chars of .floats .ffloats etc.
2665 * Makes 0 or more new frags.
2666 * If need_pass_2 == 1, no frags are emitted.
2667 * This understands only floating literals, not expressions. Sorry.
2669 * A floating constant is defined by atof_generic(), except it is preceded
2670 * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
2671 * reading, I decided to be incompatible. This always tries to give you
2672 * rounded bits to the precision of the pseudo-op. Former AS did premature
2673 * truncatation, restored noisy bits instead of trailing 0s AND gave you
2674 * a choice of 2 flavours of noise according to which of 2 floating-point
2675 * scanners you directed AS to use.
2677 * In: input_line_pointer->whitespace before, or '0' of flonum.
2682 float_cons (float_type)
2683 /* Clobbers input_line-pointer, checks end-of-line. */
2684 register int float_type; /* 'f':.ffloat ... 'F':.float ... */
2687 int length; /* Number of chars in an object. */
2688 register char *err; /* Error from scanning floating literal. */
2689 char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
2691 if (is_it_end_of_statement ())
2693 demand_empty_rest_of_line ();
2699 /* input_line_pointer->1st char of a flonum (we hope!). */
2702 /* Skip any 0{letter} that may be present. Don't even check if the
2703 * letter is legal. Someone may invent a "z" format and this routine
2704 * has no use for such information. Lusers beware: you get
2705 * diagnostics if your input is ill-conditioned.
2707 if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1]))
2708 input_line_pointer += 2;
2710 /* Accept :xxxx, where the x's are hex digits, for a floating
2711 point with the exact digits specified. */
2712 if (input_line_pointer[0] == ':')
2714 ++input_line_pointer;
2715 length = hex_float (float_type, temp);
2718 ignore_rest_of_line ();
2724 err = md_atof (float_type, temp, &length);
2725 know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
2729 as_bad ("Bad floating literal: %s", err);
2730 ignore_rest_of_line ();
2741 #ifdef REPEAT_CONS_EXPRESSIONS
2742 if (*input_line_pointer == ':')
2744 expressionS count_exp;
2746 ++input_line_pointer;
2747 expression (&count_exp);
2748 if (count_exp.X_op != O_constant
2749 || count_exp.X_add_number <= 0)
2751 as_warn ("unresolvable or nonpositive repeat count; using 1");
2754 count = count_exp.X_add_number;
2758 while (--count >= 0)
2760 p = frag_more (length);
2761 memcpy (p, temp, (unsigned int) length);
2766 while (*input_line_pointer++ == ',');
2768 --input_line_pointer; /* Put terminator back into stream. */
2769 demand_empty_rest_of_line ();
2770 } /* float_cons() */
2775 * We read 0 or more ',' seperated, double-quoted strings.
2777 * Caller should have checked need_pass_2 is FALSE because we don't check it.
2782 stringer (append_zero) /* Worker to do .ascii etc statements. */
2783 /* Checks end-of-line. */
2784 register int append_zero; /* 0: don't append '\0', else 1 */
2786 register unsigned int c;
2788 #ifdef md_flush_pending_output
2789 md_flush_pending_output ();
2793 * The following awkward logic is to parse ZERO or more strings,
2794 * comma seperated. Recall a string expression includes spaces
2795 * before the opening '\"' and spaces after the closing '\"'.
2796 * We fake a leading ',' if there is (supposed to be)
2797 * a 1st, expression. We keep demanding expressions for each
2800 if (is_it_end_of_statement ())
2802 c = 0; /* Skip loop. */
2803 ++input_line_pointer; /* Compensate for end of loop. */
2807 c = ','; /* Do loop. */
2809 while (c == ',' || c == '<' || c == '"')
2812 switch (*input_line_pointer)
2815 ++input_line_pointer; /*->1st char of string. */
2816 while (is_a_char (c = next_char_of_string ()))
2818 FRAG_APPEND_1_CHAR (c);
2822 FRAG_APPEND_1_CHAR (0);
2824 know (input_line_pointer[-1] == '\"');
2827 input_line_pointer++;
2828 c = get_single_number ();
2829 FRAG_APPEND_1_CHAR (c);
2830 if (*input_line_pointer != '>')
2832 as_bad ("Expected <nn>");
2834 input_line_pointer++;
2837 input_line_pointer++;
2841 c = *input_line_pointer;
2844 demand_empty_rest_of_line ();
2847 /* FIXME-SOMEDAY: I had trouble here on characters with the
2848 high bits set. We'll probably also have trouble with
2849 multibyte chars, wide chars, etc. Also be careful about
2850 returning values bigger than 1 byte. xoxorich. */
2853 next_char_of_string ()
2855 register unsigned int c;
2857 c = *input_line_pointer++ & CHAR_MASK;
2864 #ifndef NO_STRING_ESCAPES
2866 switch (c = *input_line_pointer++)
2894 break; /* As itself. */
2910 for (i = 0, number = 0; isdigit (c) && i < 3; c = *input_line_pointer++, i++)
2912 number = number * 8 + c - '0';
2916 --input_line_pointer;
2925 c = *input_line_pointer++;
2926 while (isxdigit (c))
2929 number = number * 16 + c - '0';
2930 else if (isupper (c))
2931 number = number * 16 + c - 'A' + 10;
2933 number = number * 16 + c - 'a' + 10;
2934 c = *input_line_pointer++;
2937 --input_line_pointer;
2942 /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
2943 as_warn ("Unterminated string: Newline inserted.");
2949 #ifdef ONLY_STANDARD_ESCAPES
2950 as_bad ("Bad escaped character in string, '?' assumed");
2952 #endif /* ONLY_STANDARD_ESCAPES */
2955 } /* switch on escaped char */
2957 #endif /* ! defined (NO_STRING_ESCAPES) */
2961 } /* switch on char */
2963 } /* next_char_of_string() */
2966 get_segmented_expression (expP)
2967 register expressionS *expP;
2969 register segT retval;
2971 retval = expression (expP);
2972 if (expP->X_op == O_illegal
2973 || expP->X_op == O_absent
2974 || expP->X_op == O_big)
2976 as_bad ("expected address expression; zero assumed");
2977 expP->X_op = O_constant;
2978 expP->X_add_number = 0;
2979 retval = absolute_section;
2985 get_known_segmented_expression (expP)
2986 register expressionS *expP;
2988 register segT retval;
2990 if ((retval = get_segmented_expression (expP)) == undefined_section)
2992 /* There is no easy way to extract the undefined symbol from the
2994 if (expP->X_add_symbol != NULL
2995 && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
2996 as_warn ("symbol \"%s\" undefined; zero assumed",
2997 S_GET_NAME (expP->X_add_symbol));
2999 as_warn ("some symbol undefined; zero assumed");
3000 retval = absolute_section;
3001 expP->X_op = O_constant;
3002 expP->X_add_number = 0;
3004 know (retval == absolute_section || SEG_NORMAL (retval));
3006 } /* get_known_segmented_expression() */
3009 get_absolute_expression ()
3014 if (exp.X_op != O_constant)
3016 if (exp.X_op != O_absent)
3017 as_bad ("bad or irreducible absolute expression; zero assumed");
3018 exp.X_add_number = 0;
3020 return exp.X_add_number;
3023 char /* return terminator */
3024 get_absolute_expression_and_terminator (val_pointer)
3025 long *val_pointer; /* return value of expression */
3027 /* FIXME: val_pointer should probably be offsetT *. */
3028 *val_pointer = (long) get_absolute_expression ();
3029 return (*input_line_pointer++);
3033 * demand_copy_C_string()
3035 * Like demand_copy_string, but return NULL if the string contains any '\0's.
3036 * Give a warning if that happens.
3039 demand_copy_C_string (len_pointer)
3044 if ((s = demand_copy_string (len_pointer)) != 0)
3048 for (len = *len_pointer;
3057 as_bad ("This string may not contain \'\\0\'");
3065 * demand_copy_string()
3067 * Demand string, but return a safe (=private) copy of the string.
3068 * Return NULL if we can't read a string here.
3071 demand_copy_string (lenP)
3074 register unsigned int c;
3080 if (*input_line_pointer == '\"')
3082 input_line_pointer++; /* Skip opening quote. */
3084 while (is_a_char (c = next_char_of_string ()))
3086 obstack_1grow (¬es, c);
3089 /* JF this next line is so demand_copy_C_string will return a null
3090 termanated string. */
3091 obstack_1grow (¬es, '\0');
3092 retval = obstack_finish (¬es);
3096 as_warn ("Missing string");
3098 ignore_rest_of_line ();
3102 } /* demand_copy_string() */
3105 * is_it_end_of_statement()
3107 * In: Input_line_pointer->next character.
3109 * Do: Skip input_line_pointer over all whitespace.
3111 * Out: 1 if input_line_pointer->end-of-line.
3114 is_it_end_of_statement ()
3117 return (is_end_of_line[(unsigned char) *input_line_pointer]);
3118 } /* is_it_end_of_statement() */
3124 register symbolS *symbolP; /* symbol we are working with */
3126 input_line_pointer++;
3127 if (*input_line_pointer == '=')
3128 input_line_pointer++;
3130 while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
3131 input_line_pointer++;
3133 if (sym_name[0] == '.' && sym_name[1] == '\0')
3135 /* Turn '. = mumble' into a .org mumble */
3136 register segT segment;
3140 segment = get_known_segmented_expression (&exp);
3142 do_org (segment, &exp, 0);
3146 symbolP = symbol_find_or_make (sym_name);
3147 pseudo_set (symbolP);
3151 /* .include -- include a file at this point. */
3164 filename = demand_copy_string (&i);
3165 demand_empty_rest_of_line ();
3166 path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ );
3167 for (i = 0; i < include_dir_count; i++)
3169 strcpy (path, include_dirs[i]);
3171 strcat (path, filename);
3172 if (0 != (try = fopen (path, "r")))
3181 /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
3182 newbuf = input_scrub_include_file (path, input_line_pointer);
3183 buffer_limit = input_scrub_next_buffer (&input_line_pointer);
3187 add_include_dir (path)
3192 if (include_dir_count == 0)
3194 include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs));
3195 include_dirs[0] = "."; /* Current dir */
3196 include_dir_count = 2;
3200 include_dir_count++;
3201 include_dirs = (char **) realloc (include_dirs,
3202 include_dir_count * sizeof (*include_dirs));
3205 include_dirs[include_dir_count - 1] = path; /* New one */
3208 if (i > include_dir_maxlen)
3209 include_dir_maxlen = i;
3210 } /* add_include_dir() */
3216 while (!is_end_of_line[(unsigned char) *input_line_pointer])
3218 ++input_line_pointer;
3220 ++input_line_pointer;