Commit | Line | Data |
---|---|---|
fecd2382 | 1 | /* read.c - read a source file - |
f8701a3f | 2 | Copyright (C) 1986, 1987, 1990, 1991 Free Software Foundation, Inc. |
3340f7e5 | 3 | |
f8701a3f SC |
4 | This file is part of GAS, the GNU Assembler. |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
fecd2382 RP |
19 | |
20 | #define MASK_CHAR (0xFF) /* If your chars aren't 8 bits, you will | |
21 | change this a bit. But then, GNU isn't | |
22 | spozed to run on your machine anyway. | |
23 | (RMS is so shortsighted sometimes.) | |
24 | */ | |
25 | ||
26 | #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16) | |
f8701a3f SC |
27 | /* This is the largest known floating point */ |
28 | /* format (for now). It will grow when we */ | |
29 | /* do 4361 style flonums. */ | |
fecd2382 RP |
30 | |
31 | ||
32 | /* Routines that read assembler source text to build spagetti in memory. */ | |
33 | /* Another group of these functions is in the as-expr.c module */ | |
34 | ||
35 | #include "as.h" | |
36 | ||
37 | #include "obstack.h" | |
f8701a3f | 38 | #include "listing.h" |
fecd2382 RP |
39 | char *input_line_pointer; /*->next char of source file to parse. */ |
40 | ||
41 | ||
42 | #if BITS_PER_CHAR != 8 | |
43 | The following table is indexed by [ (char) ] and will break if | |
f8701a3f | 44 | a char does not have exactly 256 states (hopefully 0:255!) ! |
fecd2382 | 45 | #endif |
f8701a3f SC |
46 | |
47 | const char /* used by is_... macros. our ctype[] */ | |
48 | lex_type [256] = { | |
49 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */ | |
50 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */ | |
51 | 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */ | |
52 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */ | |
53 | 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */ | |
54 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0, 0, 3, /* PQRSTUVWXYZ[\]^_ */ | |
55 | 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */ | |
56 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0, 0, 0, /* pqrstuvwxyz{|}~. */ | |
57 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
58 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
59 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
60 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
61 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
62 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
63 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
64 | }; | |
fecd2382 RP |
65 | |
66 | ||
67 | /* | |
68 | * In: a character. | |
69 | * Out: 1 if this character ends a line. | |
70 | */ | |
71 | #define _ (0) | |
72 | char is_end_of_line [256] = { | |
73 | #ifdef CR_EOL | |
f8701a3f | 74 | _, _, _, _, _, _, _, _, _, _,99, _, _, 99, _, _,/* @abcdefghijklmno */ |
fecd2382 | 75 | #else |
f8701a3f | 76 | _, _, _, _, _, _, _, _, _, _,99, _, _, _, _, _, /* @abcdefghijklmno */ |
fecd2382 | 77 | #endif |
f8701a3f SC |
78 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
79 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
80 | _, _, _, _, _, _, _, _, _, _, _,99, _, _, _, _, /* 0123456789:;<=>? */ | |
81 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
82 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
83 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
84 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
85 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
86 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
87 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
88 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
89 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _ /* */ | |
90 | }; | |
fecd2382 RP |
91 | #undef _ |
92 | ||
f8701a3f | 93 | /* Functions private to this file. */ |
fecd2382 RP |
94 | |
95 | char line_comment_chars[1]; | |
96 | char line_separator_chars[1]; | |
97 | ||
98 | static char *buffer; /* 1st char of each buffer of lines is here. */ | |
99 | static char *buffer_limit; /*->1 + last char in buffer. */ | |
100 | ||
101 | static char *bignum_low; /* Lowest char of bignum. */ | |
102 | static char *bignum_limit; /* 1st illegal address of bignum. */ | |
103 | static char *bignum_high; /* Highest char of bignum. */ | |
f8701a3f SC |
104 | /* May point to (bignum_start-1). */ |
105 | /* Never >= bignum_limit. */ | |
fecd2382 RP |
106 | static char *old_buffer = 0; /* JF a hack */ |
107 | static char *old_input; | |
108 | static char *old_limit; | |
109 | ||
110 | /* Variables for handling include file directory list. */ | |
111 | ||
112 | char **include_dirs; /* List of pointers to directories to | |
113 | search for .include's */ | |
114 | int include_dir_count; /* How many are in the list */ | |
115 | int include_dir_maxlen = 1; /* Length of longest in list */ | |
116 | ||
117 | #ifndef WORKING_DOT_WORD | |
118 | struct broken_word *broken_words; | |
119 | int new_broken_words = 0; | |
120 | #endif | |
121 | ||
f8701a3f | 122 | #ifdef __STDC__ |
fecd2382 RP |
123 | |
124 | static char *demand_copy_string(int *lenP); | |
a39116f1 RP |
125 | int is_it_end_of_statement(void); |
126 | unsigned int next_char_of_string(void); | |
fecd2382 RP |
127 | static segT get_known_segmented_expression(expressionS *expP); |
128 | static void grow_bignum(void); | |
129 | static void pobegin(void); | |
f8701a3f | 130 | void stringer(int append_zero); |
fecd2382 RP |
131 | |
132 | #else /* __STDC__ */ | |
133 | ||
134 | static char *demand_copy_string(); | |
a39116f1 RP |
135 | int is_it_end_of_statement(); |
136 | unsigned int next_char_of_string(); | |
fecd2382 RP |
137 | static segT get_known_segmented_expression(); |
138 | static void grow_bignum(); | |
139 | static void pobegin(); | |
f8701a3f | 140 | void stringer(); |
fecd2382 | 141 | |
f8701a3f | 142 | #endif /* __STDC__ */ |
fecd2382 | 143 | |
a39116f1 RP |
144 | extern int listing; |
145 | ||
fecd2382 RP |
146 | \f |
147 | void | |
f8701a3f | 148 | read_begin() |
fecd2382 | 149 | { |
f8701a3f SC |
150 | char *p; |
151 | ||
152 | pobegin(); | |
153 | obj_read_begin_hook(); | |
154 | ||
155 | obstack_begin(¬es, 5000); | |
156 | obstack_begin(&cond_obstack, 960); | |
157 | ||
fecd2382 | 158 | #define BIGNUM_BEGIN_SIZE (16) |
f8701a3f SC |
159 | bignum_low = xmalloc((long)BIGNUM_BEGIN_SIZE); |
160 | bignum_limit = bignum_low + BIGNUM_BEGIN_SIZE; | |
161 | ||
162 | /* Use machine dependent syntax */ | |
163 | for (p = line_separator_chars; *p; p++) | |
164 | is_end_of_line[*p] = 1; | |
165 | /* Use more. FIXME-SOMEDAY. */ | |
fecd2382 RP |
166 | } |
167 | \f | |
168 | /* set up pseudo-op tables */ | |
169 | ||
170 | struct hash_control * | |
f8701a3f SC |
171 | po_hash = NULL; /* use before set up: NULL->address error */ |
172 | ||
173 | #ifdef DONTDEF | |
174 | void s_gdbline(), s_gdblinetab(); | |
175 | void s_gdbbeg(), s_gdbblock(), s_gdbend(), s_gdbsym(); | |
176 | #endif | |
fecd2382 | 177 | |
fecd2382 | 178 | static const pseudo_typeS |
f8701a3f | 179 | potable[] = |
fecd2382 | 180 | { |
f8701a3f SC |
181 | { "abort", s_abort, 0 }, |
182 | { "align", s_align_ptwo, 0 }, | |
183 | { "ascii", stringer, 0 }, | |
184 | { "asciz", stringer, 1 }, | |
185 | /* block */ | |
186 | { "byte", cons, 1 }, | |
187 | { "comm", s_comm, 0 }, | |
188 | { "data", s_data, 0 }, | |
189 | /* dim */ | |
190 | { "double", float_cons, 'd' }, | |
191 | /* dsect */ | |
192 | { "eject", listing_eject, 0 }, /* Formfeed listing */ | |
193 | { "else", s_else, 0 }, | |
194 | { "end", s_end, 0 }, | |
195 | { "endif", s_endif, 0 }, | |
196 | /* endef */ | |
197 | { "equ", s_set, 0 }, | |
198 | /* err */ | |
199 | /* extend */ | |
200 | { "extern", s_ignore, 0 }, /* We treat all undef as ext */ | |
201 | { "app-file", s_app_file, 0 }, | |
202 | { "file", s_app_file, 0 }, | |
203 | { "fill", s_fill, 0 }, | |
204 | { "float", float_cons, 'f' }, | |
205 | #ifdef DONTDEF | |
206 | { "gdbbeg", s_gdbbeg, 0 }, | |
207 | { "gdbblock", s_gdbblock, 0 }, | |
208 | { "gdbend", s_gdbend, 0 }, | |
209 | { "gdbsym", s_gdbsym, 0 }, | |
210 | { "gdbline", s_gdbline, 0 }, | |
211 | { "gdblinetab",s_gdblinetab, 0 }, | |
212 | #endif | |
213 | { "global", s_globl, 0 }, | |
214 | { "globl", s_globl, 0 }, | |
215 | { "hword", cons, 2 }, | |
216 | { "if", s_if, 0 }, | |
217 | { "ifdef", s_ifdef, 0 }, | |
218 | { "ifeqs", s_ifeqs, 0 }, | |
219 | { "ifndef", s_ifdef, 1 }, | |
220 | { "ifnes", s_ifeqs, 1 }, | |
221 | { "ifnotdef", s_ifdef, 1 }, | |
222 | { "include", s_include, 0 }, | |
223 | { "int", cons, 4 }, | |
224 | { "lcomm", s_lcomm, 0 }, | |
225 | { "lflags", listing_flags, 0 }, /* Listing flags */ | |
226 | { "list", listing_list, 1 }, /* Turn listing on */ | |
227 | { "long", cons, 4 }, | |
228 | { "lsym", s_lsym, 0 }, | |
229 | { "nolist", listing_list, 0 }, /* Turn listing off */ | |
230 | { "octa", big_cons, 16 }, | |
231 | { "org", s_org, 0 }, | |
232 | { "psize", listing_psize, 0 }, /* set paper size */ | |
233 | /* print */ | |
234 | { "quad", big_cons, 8 }, | |
235 | { "sbttl", listing_title, 1 }, /* Subtitle of listing */ | |
236 | /* scl */ | |
237 | /* sect */ | |
238 | { "set", s_set, 0 }, | |
239 | { "short", cons, 2 }, | |
240 | { "single", float_cons, 'f' }, | |
241 | /* size */ | |
242 | { "space", s_space, 0 }, | |
243 | /* tag */ | |
244 | { "text", s_text, 0 }, | |
245 | { "title", listing_title, 0 }, /* Listing title */ | |
246 | /* type */ | |
247 | /* use */ | |
248 | /* val */ | |
249 | { "word", cons, 2 }, | |
250 | { NULL} /* end sentinel */ | |
fecd2382 RP |
251 | }; |
252 | ||
253 | static void pobegin() { | |
a39116f1 | 254 | char *errtxt; /* error text */ |
fecd2382 | 255 | const pseudo_typeS * pop; |
f8701a3f | 256 | |
fecd2382 | 257 | po_hash = hash_new(); |
f8701a3f | 258 | |
fecd2382 | 259 | /* Do the target-specific pseudo ops. */ |
a39116f1 RP |
260 | for (pop = md_pseudo_table; pop->poc_name; pop++) { |
261 | errtxt = hash_insert(po_hash, pop->poc_name, (char *)pop); | |
fecd2382 RP |
262 | if (errtxt && *errtxt) { |
263 | as_fatal("error constructing md pseudo-op table"); | |
264 | } /* on error */ | |
265 | } /* for each op */ | |
f8701a3f | 266 | |
fecd2382 RP |
267 | /* Now object specific. Skip any that were in the target table. */ |
268 | for (pop=obj_pseudo_table; pop->poc_name; pop++) { | |
269 | errtxt = hash_insert (po_hash, pop->poc_name, (char *)pop); | |
270 | if (errtxt && *errtxt) { | |
271 | if (!strcmp (errtxt, "exists")) { | |
272 | #ifdef DIE_ON_OVERRIDES | |
273 | as_fatal("pseudo op \".%s\" overridden.\n", pop->poc_name); | |
274 | #endif /* DIE_ON_OVERRIDES */ | |
275 | continue; /* OK if target table overrides. */ | |
276 | } else { | |
277 | as_fatal("error constructing obj pseudo-op table"); | |
278 | } /* if overridden */ | |
279 | } /* on error */ | |
280 | } /* for each op */ | |
f8701a3f | 281 | |
fecd2382 RP |
282 | /* Now portable ones. Skip any that we've seen already. */ |
283 | for (pop=potable; pop->poc_name; pop++) { | |
284 | errtxt = hash_insert (po_hash, pop->poc_name, (char *)pop); | |
285 | if (errtxt && *errtxt) { | |
286 | if (!strcmp (errtxt, "exists")) { | |
287 | #ifdef DIE_ON_OVERRIDES | |
288 | as_fatal("pseudo op \".%s\" overridden.\n", pop->poc_name); | |
289 | #endif /* DIE_ON_OVERRIDES */ | |
290 | continue; /* OK if target table overrides. */ | |
291 | } else { | |
292 | as_fatal("error constructing obj pseudo-op table"); | |
293 | } /* if overridden */ | |
294 | } /* on error */ | |
295 | } /* for each op */ | |
f8701a3f | 296 | |
fecd2382 RP |
297 | return; |
298 | } /* pobegin() */ | |
299 | \f | |
300 | #define HANDLE_CONDITIONAL_ASSEMBLY() \ | |
f8701a3f SC |
301 | if (ignore_input ()) \ |
302 | { \ | |
303 | while (! is_end_of_line[*input_line_pointer++]) \ | |
304 | if (input_line_pointer == buffer_limit) \ | |
305 | break; \ | |
306 | continue; \ | |
307 | } | |
a39116f1 | 308 | |
fecd2382 RP |
309 | |
310 | /* read_a_source_file() | |
311 | * | |
312 | * We read the file, putting things into a web that | |
313 | * represents what we have been reading. | |
314 | */ | |
315 | void read_a_source_file(name) | |
316 | char *name; | |
317 | { | |
f8701a3f SC |
318 | register char c; |
319 | register char * s; /* string of symbol, '\0' appended */ | |
320 | register int temp; | |
321 | /* register struct frag * fragP; JF unused */ /* a frag we just made */ | |
322 | pseudo_typeS *pop; | |
323 | #ifdef DONTDEF | |
324 | void gdb_block_beg(); | |
325 | void gdb_block_position(); | |
326 | void gdb_block_end(); | |
327 | void gdb_symbols_fixup(); | |
328 | #endif | |
329 | ||
330 | buffer = input_scrub_new_file(name); | |
331 | ||
332 | listing_file(name); | |
333 | listing_newline(""); | |
334 | ||
335 | while ((buffer_limit = input_scrub_next_buffer(&input_line_pointer)) != 0) { /* We have another line to parse. */ | |
336 | know(buffer_limit[-1] == '\n'); /* Must have a sentinel. */ | |
337 | contin: /* JF this goto is my fault I admit it. Someone brave please re-write | |
338 | the whole input section here? Pleeze??? */ | |
339 | while (input_line_pointer < buffer_limit) { /* We have more of this buffer to parse. */ | |
340 | ||
341 | /* | |
342 | * We now have input_line_pointer->1st char of next line. | |
343 | * If input_line_pointer [-1] == '\n' then we just | |
344 | * scanned another line: so bump line counters. | |
345 | */ | |
346 | if (input_line_pointer[-1] == '\n') { | |
347 | bump_line_counters(); | |
348 | ||
349 | #ifdef MRI | |
350 | /* Text at the start of a line must be a label, we run down and stick a colon in */ | |
351 | if (is_name_beginner(*input_line_pointer)) | |
352 | { | |
353 | char *line_start = input_line_pointer; | |
354 | char c = get_symbol_end(); | |
355 | colon(line_start); | |
356 | *input_line_pointer = c; | |
357 | if (c == ':') | |
358 | input_line_pointer++; | |
359 | ||
360 | } | |
361 | #endif | |
362 | } /* just passed a newline */ | |
363 | ||
364 | ||
365 | ||
366 | ||
a39116f1 | 367 | |
f8701a3f SC |
368 | /* |
369 | * We are at the begining of a line, or similar place. | |
370 | * We expect a well-formed assembler statement. | |
371 | * A "symbol-name:" is a statement. | |
372 | * | |
373 | * Depending on what compiler is used, the order of these tests | |
374 | * may vary to catch most common case 1st. | |
375 | * Each test is independent of all other tests at the (top) level. | |
376 | * PLEASE make a compiler that doesn't use this assembler. | |
377 | * It is crufty to waste a compiler's time encoding things for this | |
378 | * assembler, which then wastes more time decoding it. | |
379 | * (And communicating via (linear) files is silly! | |
380 | * If you must pass stuff, please pass a tree!) | |
381 | */ | |
382 | if ((c = *input_line_pointer++) == '\t' || c == ' ' || c=='\f' || c == 0) { | |
383 | c = *input_line_pointer++; | |
384 | } | |
385 | know(c != ' '); /* No further leading whitespace. */ | |
386 | LISTING_NEWLINE(); | |
387 | /* | |
388 | * C is the 1st significant character. | |
389 | * Input_line_pointer points after that character. | |
390 | */ | |
391 | if (is_name_beginner(c)) { /* want user-defined label or pseudo/opcode */ | |
392 | HANDLE_CONDITIONAL_ASSEMBLY(); | |
fecd2382 | 393 | |
f8701a3f SC |
394 | s = --input_line_pointer; |
395 | c = get_symbol_end(); /* name's delimiter */ | |
396 | /* | |
397 | * C is character after symbol. | |
398 | * That character's place in the input line is now '\0'. | |
399 | * S points to the beginning of the symbol. | |
400 | * [In case of pseudo-op, s->'.'.] | |
401 | * Input_line_pointer->'\0' where c was. | |
402 | */ | |
403 | if (c == ':') { | |
404 | colon(s); /* user-defined label */ | |
405 | * input_line_pointer ++ = ':'; /* Put ':' back for error messages' sake. */ | |
406 | /* Input_line_pointer->after ':'. */ | |
407 | SKIP_WHITESPACE(); | |
408 | ||
a39116f1 | 409 | |
f8701a3f SC |
410 | } else if (c == '=' || input_line_pointer[1] == '=') { /* JF deal with FOO=BAR */ |
411 | equals(s); | |
412 | demand_empty_rest_of_line(); | |
413 | } else { /* expect pseudo-op or machine instruction */ | |
414 | #ifdef MRI | |
415 | if(!done_pseudo(s)) | |
416 | ||
417 | #else | |
418 | if (*s == '.') { | |
419 | /* | |
420 | * PSEUDO - OP. | |
421 | * | |
422 | * WARNING: c has next char, which may be end-of-line. | |
423 | * We lookup the pseudo-op table with s+1 because we | |
424 | * already know that the pseudo-op begins with a '.'. | |
425 | */ | |
fecd2382 | 426 | |
f8701a3f | 427 | pop = (pseudo_typeS *) hash_find(po_hash, s+1); |
fecd2382 | 428 | |
f8701a3f SC |
429 | /* Print the error msg now, while we still can */ |
430 | if (!pop) { | |
431 | as_bad("Unknown pseudo-op: `%s'",s); | |
432 | *input_line_pointer = c; | |
433 | s_ignore(0); | |
434 | break; | |
435 | } | |
fecd2382 | 436 | |
f8701a3f SC |
437 | /* Put it back for error messages etc. */ |
438 | *input_line_pointer = c; | |
439 | /* The following skip of whitespace is compulsory. */ | |
440 | /* A well shaped space is sometimes all that separates keyword from operands. */ | |
441 | if (c == ' ' || c == '\t') { | |
442 | input_line_pointer++; | |
443 | } /* Skip seperator after keyword. */ | |
444 | /* | |
445 | * Input_line is restored. | |
446 | * Input_line_pointer->1st non-blank char | |
447 | * after pseudo-operation. | |
448 | */ | |
449 | if (!pop) { | |
450 | ignore_rest_of_line(); | |
451 | break; | |
452 | } else { | |
453 | (*pop->poc_handler)(pop->poc_val); | |
454 | } /* if we have one */ | |
455 | } else | |
456 | #endif | |
457 | { /* machine instruction */ | |
458 | /* WARNING: c has char, which may be end-of-line. */ | |
459 | /* Also: input_line_pointer->`\0` where c was. */ | |
460 | * input_line_pointer = c; | |
461 | while (!is_end_of_line[*input_line_pointer]) { | |
462 | input_line_pointer++; | |
463 | } | |
464 | ||
465 | c = *input_line_pointer; | |
466 | *input_line_pointer = '\0'; | |
467 | ||
468 | md_assemble(s); /* Assemble 1 instruction. */ | |
469 | ||
470 | *input_line_pointer++ = c; | |
471 | ||
472 | /* We resume loop AFTER the end-of-line from this instruction */ | |
473 | } /* if (*s=='.') */ | |
474 | ||
475 | } /* if c==':' */ | |
476 | continue; | |
477 | } /* if (is_name_beginner(c) */ | |
fecd2382 | 478 | |
fecd2382 | 479 | |
f8701a3f SC |
480 | if (is_end_of_line [c]) { |
481 | continue; | |
482 | } /* empty statement */ | |
a39116f1 | 483 | |
f8701a3f SC |
484 | |
485 | #if defined(LOCAL_LABELS_DOLLAR) || defined(LOCAL_LABELS_FB) | |
486 | if (isdigit(c)) { /* local label ("4:") */ | |
487 | char *backup = input_line_pointer; | |
488 | ||
489 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
490 | ||
491 | temp = c - '0'; | |
492 | ||
493 | while (isdigit(*input_line_pointer)) { | |
494 | temp = (temp * 10) + *input_line_pointer - '0'; | |
495 | ++input_line_pointer; | |
496 | } /* read the whole number */ | |
497 | ||
fecd2382 | 498 | #ifdef LOCAL_LABELS_DOLLAR |
f8701a3f SC |
499 | if (*input_line_pointer == '$' |
500 | && *(input_line_pointer + 1) == ':') { | |
501 | input_line_pointer += 2; | |
502 | ||
503 | if (dollar_label_defined(temp)) { | |
504 | as_fatal("label \"%d$\" redefined", temp); | |
505 | } | |
506 | ||
507 | define_dollar_label(temp); | |
508 | colon(dollar_label_name(temp, 0)); | |
509 | continue; | |
510 | } | |
511 | #endif /* LOCAL_LABELS_DOLLAR */ | |
512 | ||
513 | #ifdef LOCAL_LABELS_FB | |
514 | if (*input_line_pointer++ == ':') { | |
515 | fb_label_instance_inc(temp); | |
516 | colon(fb_label_name(temp, 0)); | |
517 | continue; | |
518 | } | |
519 | #endif /* LOCAL_LABELS_FB */ | |
520 | ||
521 | input_line_pointer = backup; | |
522 | } /* local label ("4:") */ | |
523 | #endif /* LOCAL_LABELS_DOLLAR or LOCAL_LABELS_FB */ | |
524 | ||
525 | if (c && strchr(line_comment_chars,c)) { /* Its a comment. Better say APP or NO_APP */ | |
526 | char *ends; | |
527 | char *new_buf; | |
528 | char *new_tmp; | |
529 | int new_length; | |
530 | char *tmp_buf = 0; | |
531 | extern char *scrub_string,*scrub_last_string; | |
fecd2382 | 532 | |
f8701a3f SC |
533 | bump_line_counters(); |
534 | s=input_line_pointer; | |
535 | if (strncmp(s,"APP\n",4)) | |
536 | continue; /* We ignore it */ | |
537 | s+=4; | |
fecd2382 | 538 | |
f8701a3f | 539 | ends=strstr(s,"#NO_APP\n"); |
fecd2382 | 540 | |
f8701a3f SC |
541 | if (!ends) { |
542 | int tmp_len; | |
543 | int num; | |
fecd2382 | 544 | |
f8701a3f SC |
545 | /* The end of the #APP wasn't in this buffer. We |
546 | keep reading in buffers until we find the #NO_APP | |
547 | that goes with this #APP There is one. The specs | |
548 | guarentee it. . . */ | |
549 | tmp_len=buffer_limit-s; | |
550 | tmp_buf=xmalloc(tmp_len); | |
551 | bcopy(s,tmp_buf,tmp_len); | |
552 | do { | |
553 | new_tmp = input_scrub_next_buffer(&buffer); | |
554 | if (!new_tmp) | |
555 | break; | |
556 | else | |
557 | buffer_limit = new_tmp; | |
558 | input_line_pointer = buffer; | |
559 | ends = strstr(buffer,"#NO_APP\n"); | |
560 | if (ends) | |
561 | num=ends-buffer; | |
562 | else | |
563 | num=buffer_limit-buffer; | |
fecd2382 | 564 | |
f8701a3f SC |
565 | tmp_buf = xrealloc(tmp_buf, tmp_len + num); |
566 | bcopy(buffer,tmp_buf+tmp_len,num); | |
567 | tmp_len+=num; | |
568 | } while(!ends); | |
fecd2382 | 569 | |
f8701a3f | 570 | input_line_pointer= ends ? ends+8 : NULL; |
fecd2382 | 571 | |
f8701a3f SC |
572 | s=tmp_buf; |
573 | ends=s+tmp_len; | |
fecd2382 | 574 | |
f8701a3f SC |
575 | } else { |
576 | input_line_pointer=ends+8; | |
577 | } | |
578 | new_buf=xmalloc(100); | |
579 | new_length=100; | |
580 | new_tmp=new_buf; | |
581 | ||
582 | scrub_string=s; | |
583 | scrub_last_string = ends; | |
584 | for(;;) { | |
585 | int ch; | |
586 | ||
587 | ch = do_scrub_next_char(scrub_from_string, scrub_to_string); | |
588 | if (ch==EOF) break; | |
589 | *new_tmp++=ch; | |
590 | if (new_tmp==new_buf+new_length) { | |
591 | new_buf=xrealloc(new_buf,new_length+100); | |
592 | new_tmp=new_buf+new_length; | |
593 | new_length+=100; | |
594 | } | |
fecd2382 | 595 | } |
f8701a3f SC |
596 | |
597 | if (tmp_buf) | |
598 | free(tmp_buf); | |
599 | old_buffer=buffer; | |
600 | old_input=input_line_pointer; | |
601 | old_limit=buffer_limit; | |
602 | buffer=new_buf; | |
603 | input_line_pointer=new_buf; | |
604 | buffer_limit=new_tmp; | |
605 | continue; | |
606 | } | |
607 | ||
608 | HANDLE_CONDITIONAL_ASSEMBLY(); | |
609 | ||
610 | /* as_warn("Junk character %d.",c); Now done by ignore_rest */ | |
611 | input_line_pointer--; /* Report unknown char as ignored. */ | |
612 | ignore_rest_of_line(); | |
613 | } /* while (input_line_pointer<buffer_limit) */ | |
614 | if (old_buffer) { | |
615 | bump_line_counters(); | |
616 | if (old_input != 0) { | |
617 | buffer=old_buffer; | |
618 | input_line_pointer=old_input; | |
619 | buffer_limit=old_limit; | |
620 | old_buffer = 0; | |
621 | goto contin; | |
622 | } | |
623 | } | |
624 | } /* while (more buffers to scan) */ | |
625 | input_scrub_close(); /* Close the input file */ | |
626 | ||
fecd2382 RP |
627 | } /* read_a_source_file() */ |
628 | ||
629 | void s_abort() { | |
630 | as_fatal(".abort detected. Abandoning ship."); | |
631 | } /* s_abort() */ | |
632 | ||
633 | /* For machines where ".align 4" means align to a 4 byte boundary. */ | |
634 | void s_align_bytes(arg) | |
635 | int arg; | |
636 | { | |
f8701a3f SC |
637 | register unsigned int temp; |
638 | register long temp_fill; | |
639 | unsigned int i = 0; | |
640 | unsigned long max_alignment = 1 << 15; | |
641 | ||
642 | if (is_end_of_line[*input_line_pointer]) | |
643 | temp = arg; /* Default value from pseudo-op table */ | |
644 | else | |
645 | temp = get_absolute_expression (); | |
646 | ||
647 | if (temp > max_alignment) { | |
648 | as_bad("Alignment too large: %d. assumed.", temp = max_alignment); | |
649 | } | |
650 | ||
651 | /* | |
652 | * For the sparc, `.align (1<<n)' actually means `.align n' | |
653 | * so we have to convert it. | |
654 | */ | |
655 | if (temp != 0) { | |
656 | for (i = 0; (temp & 1) == 0; temp >>= 1, ++i) | |
657 | ; | |
658 | } | |
659 | if (temp != 1) | |
660 | as_bad("Alignment not a power of 2"); | |
661 | ||
662 | temp = i; | |
663 | if (*input_line_pointer == ',') { | |
664 | input_line_pointer ++; | |
665 | temp_fill = get_absolute_expression (); | |
666 | } else { | |
667 | temp_fill = 0; | |
668 | } | |
669 | /* Only make a frag if we HAVE to. . . */ | |
670 | if (temp && ! need_pass_2) | |
671 | frag_align(temp, (int)temp_fill); | |
672 | ||
673 | demand_empty_rest_of_line(); | |
fecd2382 RP |
674 | } /* s_align_bytes() */ |
675 | ||
676 | /* For machines where ".align 4" means align to 2**4 boundary. */ | |
677 | void s_align_ptwo() { | |
678 | register int temp; | |
679 | register long temp_fill; | |
680 | long max_alignment = 15; | |
f8701a3f | 681 | |
fecd2382 RP |
682 | temp = get_absolute_expression (); |
683 | if (temp > max_alignment) | |
f8701a3f | 684 | as_bad("Alignment too large: %d. assumed.", temp = max_alignment); |
fecd2382 RP |
685 | else if (temp < 0) { |
686 | as_bad("Alignment negative. 0 assumed."); | |
687 | temp = 0; | |
688 | } | |
689 | if (*input_line_pointer == ',') { | |
690 | input_line_pointer ++; | |
691 | temp_fill = get_absolute_expression (); | |
692 | } else | |
f8701a3f | 693 | temp_fill = 0; |
fecd2382 RP |
694 | /* Only make a frag if we HAVE to. . . */ |
695 | if (temp && ! need_pass_2) | |
f8701a3f SC |
696 | frag_align (temp, (int)temp_fill); |
697 | ||
fecd2382 | 698 | record_alignment(now_seg, temp); |
f8701a3f | 699 | |
fecd2382 RP |
700 | demand_empty_rest_of_line(); |
701 | } /* s_align_ptwo() */ | |
702 | ||
703 | void s_comm() { | |
704 | register char *name; | |
705 | register char c; | |
706 | register char *p; | |
707 | register int temp; | |
708 | register symbolS * symbolP; | |
f8701a3f | 709 | |
fecd2382 RP |
710 | name = input_line_pointer; |
711 | c = get_symbol_end(); | |
712 | /* just after name is now '\0' */ | |
713 | p = input_line_pointer; | |
714 | *p = c; | |
715 | SKIP_WHITESPACE(); | |
716 | if (*input_line_pointer != ',') { | |
717 | as_bad("Expected comma after symbol-name: rest of line ignored."); | |
718 | ignore_rest_of_line(); | |
719 | return; | |
720 | } | |
721 | input_line_pointer ++; /* skip ',' */ | |
722 | if ((temp = get_absolute_expression()) < 0) { | |
723 | as_warn(".COMMon length (%d.) <0! Ignored.", temp); | |
724 | ignore_rest_of_line(); | |
725 | return; | |
726 | } | |
727 | *p = 0; | |
728 | symbolP = symbol_find_or_make(name); | |
729 | *p = c; | |
730 | if (S_IS_DEFINED(symbolP)) { | |
731 | as_bad("Ignoring attempt to re-define symbol"); | |
732 | ignore_rest_of_line(); | |
733 | return; | |
734 | } | |
735 | if (S_GET_VALUE(symbolP)) { | |
736 | if (S_GET_VALUE(symbolP) != temp) | |
f8701a3f SC |
737 | as_bad("Length of .comm \"%s\" is already %d. Not changed to %d.", |
738 | S_GET_NAME(symbolP), | |
739 | S_GET_VALUE(symbolP), | |
740 | temp); | |
fecd2382 RP |
741 | } else { |
742 | S_SET_VALUE(symbolP, temp); | |
743 | S_SET_EXTERNAL(symbolP); | |
744 | } | |
745 | #ifdef VMS | |
746 | if (!temp) | |
f8701a3f | 747 | symbolP->sy_other = const_flag; |
fecd2382 RP |
748 | #endif |
749 | know(symbolP->sy_frag == &zero_address_frag); | |
750 | demand_empty_rest_of_line(); | |
751 | } /* s_comm() */ | |
752 | ||
753 | void | |
f8701a3f | 754 | s_data() |
fecd2382 RP |
755 | { |
756 | register int temp; | |
f8701a3f | 757 | |
fecd2382 | 758 | temp = get_absolute_expression (); |
a39116f1 RP |
759 | #ifdef MANY_SEGMENTS |
760 | subseg_new (SEG_E1, (subsegT)temp); | |
761 | #else | |
fecd2382 | 762 | subseg_new (SEG_DATA, (subsegT)temp); |
a39116f1 | 763 | #endif |
f8701a3f | 764 | |
fecd2382 RP |
765 | #ifdef VMS |
766 | const_flag = 0; | |
767 | #endif | |
768 | demand_empty_rest_of_line(); | |
769 | } | |
770 | ||
771 | void s_app_file() { | |
772 | register char *s; | |
773 | int length; | |
f8701a3f | 774 | |
fecd2382 RP |
775 | /* Some assemblers tolerate immediately following '"' */ |
776 | if ((s = demand_copy_string(&length)) != 0) { | |
777 | new_logical_line(s, -1); | |
778 | demand_empty_rest_of_line(); | |
779 | } | |
780 | #ifdef OBJ_COFF | |
781 | c_dot_file_symbol(s); | |
782 | #endif /* OBJ_COFF */ | |
783 | } /* s_app_file() */ | |
784 | ||
785 | void s_fill() { | |
7c2d4011 SC |
786 | long temp_repeat = 0; |
787 | long temp_size = 1 ; | |
788 | register long temp_fill = 0; | |
fecd2382 | 789 | char *p; |
f8701a3f | 790 | |
7c2d4011 SC |
791 | |
792 | temp_repeat = get_absolute_expression(); | |
793 | if (*input_line_pointer == ',') | |
794 | { | |
795 | input_line_pointer++; | |
796 | temp_size = get_absolute_expression(); | |
797 | if (*input_line_pointer == ',') | |
798 | { | |
799 | input_line_pointer++; | |
800 | temp_fill = get_absolute_expression(); | |
801 | } | |
fecd2382 RP |
802 | } |
803 | /* | |
804 | * This is to be compatible with BSD 4.2 AS, not for any rational reason. | |
805 | */ | |
806 | #define BSD_FILL_SIZE_CROCK_8 (8) | |
807 | if (temp_size > BSD_FILL_SIZE_CROCK_8) { | |
7fd3560a | 808 | as_warn(".fill size clamped to %d.", BSD_FILL_SIZE_CROCK_8); |
fecd2382 RP |
809 | temp_size = BSD_FILL_SIZE_CROCK_8 ; |
810 | } if (temp_size < 0) { | |
811 | as_warn("Size negative: .fill ignored."); | |
812 | temp_size = 0; | |
813 | } else if (temp_repeat <= 0) { | |
814 | as_warn("Repeat < 0, .fill ignored"); | |
815 | temp_size = 0; | |
816 | } | |
7fd3560a | 817 | |
fecd2382 RP |
818 | if (temp_size && !need_pass_2) { |
819 | p = frag_var(rs_fill, (int)temp_size, (int)temp_size, (relax_substateT)0, (symbolS *)0, temp_repeat, (char *)0); | |
f8701a3f SC |
820 | bzero (p, (int)temp_size); |
821 | /* | |
822 | * The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX flavoured AS. | |
823 | * The following bizzare behaviour is to be compatible with above. | |
824 | * I guess they tried to take up to 8 bytes from a 4-byte expression | |
825 | * and they forgot to sign extend. Un*x Sux. | |
826 | */ | |
fecd2382 RP |
827 | #define BSD_FILL_SIZE_CROCK_4 (4) |
828 | md_number_to_chars (p, temp_fill, temp_size > BSD_FILL_SIZE_CROCK_4 ? BSD_FILL_SIZE_CROCK_4 : (int)temp_size); | |
f8701a3f SC |
829 | /* |
830 | * Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes) | |
831 | * but emits no error message because it seems a legal thing to do. | |
832 | * It is a degenerate case of .fill but could be emitted by a compiler. | |
833 | */ | |
834 | } | |
835 | demand_empty_rest_of_line(); | |
836 | } | |
837 | ||
838 | #ifdef DONTDEF | |
839 | void | |
840 | s_gdbbeg() | |
841 | { | |
842 | register int temp; | |
843 | ||
844 | temp = get_absolute_expression (); | |
845 | if (temp < 0) | |
846 | as_warn("Block number <0. Ignored."); | |
847 | else if (flagseen ['G']) | |
848 | gdb_block_beg ((long) temp, frag_now, (long)(obstack_next_free(& frags) - frag_now->fr_literal)); | |
849 | demand_empty_rest_of_line (); | |
850 | } | |
851 | ||
852 | void | |
853 | s_gdbblock() | |
854 | { | |
855 | register int position; | |
856 | int temp; | |
857 | ||
858 | if (get_absolute_expression_and_terminator (&temp) != ',') { | |
859 | as_bad("expected comma before position in .gdbblock"); | |
860 | --input_line_pointer; | |
861 | ignore_rest_of_line (); | |
862 | return; | |
863 | } | |
864 | position = get_absolute_expression (); | |
865 | if (flagseen ['G']) | |
866 | gdb_block_position ((long) temp, (long) position); | |
867 | demand_empty_rest_of_line (); | |
868 | } | |
869 | ||
870 | void | |
871 | s_gdbend() | |
872 | { | |
873 | register int temp; | |
874 | ||
875 | temp = get_absolute_expression (); | |
876 | if (temp < 0) | |
877 | as_warn("Block number <0. Ignored."); | |
878 | else if (flagseen ['G']) | |
879 | gdb_block_end ((long) temp, frag_now, (long)(obstack_next_free(& frags) - frag_now->fr_literal)); | |
880 | demand_empty_rest_of_line (); | |
881 | } | |
882 | ||
883 | void | |
884 | s_gdbsym() | |
885 | { | |
886 | register char *name, | |
887 | *p; | |
888 | register char c; | |
889 | register symbolS * symbolP; | |
890 | register int temp; | |
891 | ||
892 | name = input_line_pointer; | |
893 | c = get_symbol_end(); | |
894 | p = input_line_pointer; | |
895 | symbolP = symbol_find_or_make(name); | |
896 | *p = c; | |
897 | SKIP_WHITESPACE(); | |
898 | if (* input_line_pointer != ',') { | |
899 | as_bad("Expected comma after name"); | |
900 | ignore_rest_of_line(); | |
901 | return; | |
fecd2382 | 902 | } |
f8701a3f SC |
903 | input_line_pointer ++; |
904 | if ((temp = get_absolute_expression ()) < 0) { | |
905 | as_bad("Bad GDB symbol file offset (%d.) <0! Ignored.", temp); | |
906 | ignore_rest_of_line(); | |
907 | return; | |
908 | } | |
909 | if (flagseen ['G']) | |
910 | gdb_symbols_fixup (symbolP, (long)temp); | |
911 | demand_empty_rest_of_line (); | |
912 | } | |
913 | ||
914 | void | |
915 | s_gdbline() | |
916 | { | |
917 | int file_number, | |
918 | lineno; | |
919 | ||
920 | if (get_absolute_expression_and_terminator(&file_number) != ',') { | |
921 | as_bad("expected comman after filenum in .gdbline"); | |
922 | ignore_rest_of_line(); | |
923 | return; | |
924 | } | |
925 | lineno=get_absolute_expression(); | |
926 | if (flagseen['G']) | |
927 | gdb_line(file_number,lineno); | |
fecd2382 RP |
928 | demand_empty_rest_of_line(); |
929 | } | |
930 | ||
f8701a3f SC |
931 | |
932 | void | |
933 | s_gdblinetab() | |
934 | { | |
935 | int file_number, | |
936 | offset; | |
937 | ||
938 | if (get_absolute_expression_and_terminator(&file_number) != ',') { | |
939 | as_bad("expected comma after filenum in .gdblinetab"); | |
940 | ignore_rest_of_line(); | |
941 | return; | |
942 | } | |
943 | offset=get_absolute_expression(); | |
944 | if (flagseen['G']) | |
945 | gdb_line_tab(file_number,offset); | |
946 | demand_empty_rest_of_line(); | |
947 | } | |
948 | #endif | |
949 | ||
fecd2382 RP |
950 | void s_globl() { |
951 | register char *name; | |
952 | register int c; | |
953 | register symbolS * symbolP; | |
f8701a3f | 954 | |
fecd2382 RP |
955 | do { |
956 | name = input_line_pointer; | |
957 | c = get_symbol_end(); | |
958 | symbolP = symbol_find_or_make(name); | |
959 | * input_line_pointer = c; | |
960 | SKIP_WHITESPACE(); | |
961 | S_SET_EXTERNAL(symbolP); | |
962 | if (c==',') { | |
963 | input_line_pointer++; | |
964 | SKIP_WHITESPACE(); | |
965 | if (*input_line_pointer=='\n') | |
f8701a3f | 966 | c='\n'; |
fecd2382 RP |
967 | } |
968 | } while(c==','); | |
969 | demand_empty_rest_of_line(); | |
970 | } /* s_globl() */ | |
971 | ||
972 | void s_lcomm(needs_align) | |
973 | int needs_align; /* 1 if this was a ".bss" directive, which may require | |
974 | * a 3rd argument (alignment). | |
975 | * 0 if it was an ".lcomm" (2 args only) | |
976 | */ | |
977 | { | |
978 | register char *name; | |
979 | register char c; | |
980 | register char *p; | |
981 | register int temp; | |
982 | register symbolS * symbolP; | |
983 | const int max_alignment = 15; | |
a39116f1 | 984 | int align = 0; |
f8701a3f | 985 | |
fecd2382 RP |
986 | name = input_line_pointer; |
987 | c = get_symbol_end(); | |
988 | p = input_line_pointer; | |
989 | *p = c; | |
990 | SKIP_WHITESPACE(); | |
a39116f1 | 991 | if (*input_line_pointer != ',') { |
fecd2382 RP |
992 | as_bad("Expected comma after name"); |
993 | ignore_rest_of_line(); | |
994 | return; | |
995 | } | |
f8701a3f | 996 | |
a39116f1 | 997 | ++input_line_pointer; |
f8701a3f | 998 | |
fecd2382 RP |
999 | if (*input_line_pointer == '\n') { |
1000 | as_bad("Missing size expression"); | |
1001 | return; | |
1002 | } | |
f8701a3f | 1003 | |
fecd2382 RP |
1004 | if ((temp = get_absolute_expression ()) < 0) { |
1005 | as_warn("BSS length (%d.) <0! Ignored.", temp); | |
1006 | ignore_rest_of_line(); | |
1007 | return; | |
1008 | } | |
f8701a3f | 1009 | |
fecd2382 RP |
1010 | if (needs_align) { |
1011 | align = 0; | |
1012 | SKIP_WHITESPACE(); | |
1013 | if (*input_line_pointer != ',') { | |
1014 | as_bad("Expected comma after size"); | |
1015 | ignore_rest_of_line(); | |
1016 | return; | |
1017 | } | |
1018 | input_line_pointer++; | |
1019 | SKIP_WHITESPACE(); | |
1020 | if (*input_line_pointer == '\n') { | |
1021 | as_bad("Missing alignment"); | |
1022 | return; | |
1023 | } | |
1024 | align = get_absolute_expression (); | |
1025 | if (align > max_alignment){ | |
1026 | align = max_alignment; | |
1027 | as_warn("Alignment too large: %d. assumed.", align); | |
1028 | } else if (align < 0) { | |
1029 | align = 0; | |
1030 | as_warn("Alignment negative. 0 assumed."); | |
1031 | } | |
a39116f1 RP |
1032 | #ifdef MANY_SEGMENTS |
1033 | #define SEG_BSS SEG_E2 | |
1034 | record_alignment(SEG_E2, align); | |
1035 | #else | |
fecd2382 | 1036 | record_alignment(SEG_BSS, align); |
a39116f1 | 1037 | #endif |
fecd2382 | 1038 | } /* if needs align */ |
f8701a3f | 1039 | |
fecd2382 RP |
1040 | *p = 0; |
1041 | symbolP = symbol_find_or_make(name); | |
1042 | *p = c; | |
f8701a3f | 1043 | |
fecd2382 RP |
1044 | if ( |
1045 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) | |
1046 | S_GET_OTHER(symbolP) == 0 && | |
1047 | S_GET_DESC(symbolP) == 0 && | |
1048 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
1049 | (((S_GET_SEGMENT(symbolP) == SEG_BSS) && (S_GET_VALUE(symbolP) == local_bss_counter)) | |
1050 | || (!S_IS_DEFINED(symbolP) && S_GET_VALUE(symbolP) == 0))) { | |
1051 | if (needs_align){ | |
1052 | /* Align */ | |
1053 | align = ~ ((~0) << align); /* Convert to a mask */ | |
1054 | local_bss_counter = | |
1055 | (local_bss_counter + align) & (~align); | |
1056 | } | |
f8701a3f | 1057 | |
fecd2382 RP |
1058 | S_SET_VALUE(symbolP,local_bss_counter); |
1059 | S_SET_SEGMENT(symbolP, SEG_BSS); | |
1060 | #ifdef OBJ_COFF | |
1061 | /* The symbol may already have been created with a preceding | |
1062 | * ".globl" directive -- be careful not to step on storage | |
1063 | * class in that case. Otherwise, set it to static. | |
1064 | */ | |
1065 | if (S_GET_STORAGE_CLASS(symbolP) != C_EXT){ | |
1066 | S_SET_STORAGE_CLASS(symbolP, C_STAT); | |
1067 | } | |
1068 | #endif /* OBJ_COFF */ | |
1069 | symbolP->sy_frag = & bss_address_frag; | |
1070 | local_bss_counter += temp; | |
1071 | } else { | |
1072 | as_bad("Ignoring attempt to re-define symbol from %d. to %d.", | |
f8701a3f | 1073 | S_GET_VALUE(symbolP), local_bss_counter); |
fecd2382 RP |
1074 | } |
1075 | demand_empty_rest_of_line(); | |
f8701a3f | 1076 | |
fecd2382 RP |
1077 | return; |
1078 | } /* s_lcomm() */ | |
1079 | ||
1080 | void | |
f8701a3f | 1081 | s_long() |
fecd2382 RP |
1082 | { |
1083 | cons(4); | |
1084 | } | |
1085 | ||
1086 | void | |
f8701a3f | 1087 | s_int() |
fecd2382 RP |
1088 | { |
1089 | cons(4); | |
1090 | } | |
1091 | ||
1092 | void s_lsym() { | |
1093 | register char *name; | |
1094 | register char c; | |
1095 | register char *p; | |
1096 | register segT segment; | |
1097 | expressionS exp; | |
1098 | register symbolS *symbolP; | |
f8701a3f | 1099 | |
fecd2382 RP |
1100 | /* we permit ANY defined expression: BSD4.2 demands constants */ |
1101 | name = input_line_pointer; | |
1102 | c = get_symbol_end(); | |
1103 | p = input_line_pointer; | |
1104 | *p = c; | |
1105 | SKIP_WHITESPACE(); | |
1106 | if (* input_line_pointer != ',') { | |
1107 | *p = 0; | |
1108 | as_bad("Expected comma after name \"%s\"", name); | |
1109 | *p = c; | |
1110 | ignore_rest_of_line(); | |
1111 | return; | |
1112 | } | |
1113 | input_line_pointer ++; | |
1114 | segment = expression(& exp); | |
1115 | if (segment != SEG_ABSOLUTE | |
a39116f1 | 1116 | #ifdef MANY_SEGMENTS |
f8701a3f | 1117 | && ! ( segment >= SEG_E0 && segment <= SEG_UNKNOWN) |
a39116f1 | 1118 | #else |
f8701a3f SC |
1119 | && segment != SEG_DATA |
1120 | && segment != SEG_TEXT | |
1121 | && segment != SEG_BSS | |
a39116f1 | 1122 | #endif |
f8701a3f | 1123 | && segment != SEG_REGISTER) { |
fecd2382 RP |
1124 | as_bad("Bad expression: %s", segment_name(segment)); |
1125 | ignore_rest_of_line(); | |
1126 | return; | |
1127 | } | |
1128 | *p = 0; | |
1129 | symbolP = symbol_find_or_make(name); | |
f8701a3f | 1130 | |
fecd2382 RP |
1131 | /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 |
1132 | && symbolP->sy_desc == 0) out of this test | |
1133 | because coff doesn't have those fields, and I | |
1134 | can't see when they'd ever be tripped. I don't | |
1135 | think I understand why they were here so I may | |
1136 | have introduced a bug. As recently as 1.37 didn't | |
1137 | have this test anyway. xoxorich. */ | |
f8701a3f | 1138 | |
fecd2382 RP |
1139 | if (S_GET_SEGMENT(symbolP) == SEG_UNKNOWN |
1140 | && S_GET_VALUE(symbolP) == 0) { | |
1141 | /* The name might be an undefined .global symbol; be | |
1142 | sure to keep the "external" bit. */ | |
1143 | S_SET_SEGMENT(symbolP, segment); | |
1144 | S_SET_VALUE(symbolP, (valueT)(exp.X_add_number)); | |
1145 | } else { | |
1146 | as_bad("Symbol %s already defined", name); | |
1147 | } | |
1148 | *p = c; | |
1149 | demand_empty_rest_of_line(); | |
1150 | } /* s_lsym() */ | |
1151 | ||
1152 | void s_org() { | |
1153 | register segT segment; | |
1154 | expressionS exp; | |
1155 | register long temp_fill; | |
1156 | register char *p; | |
f8701a3f SC |
1157 | /* |
1158 | * Don't believe the documentation of BSD 4.2 AS. | |
1159 | * There is no such thing as a sub-segment-relative origin. | |
1160 | * Any absolute origin is given a warning, then assumed to be segment-relative. | |
1161 | * Any segmented origin expression ("foo+42") had better be in the right | |
1162 | * segment or the .org is ignored. | |
1163 | * | |
1164 | * BSD 4.2 AS warns if you try to .org backwards. We cannot because we | |
1165 | * never know sub-segment sizes when we are reading code. | |
1166 | * BSD will crash trying to emit -ve numbers of filler bytes in certain | |
1167 | * .orgs. We don't crash, but see as-write for that code. | |
1168 | */ | |
1169 | /* | |
1170 | * Don't make frag if need_pass_2==1. | |
1171 | */ | |
fecd2382 RP |
1172 | segment = get_known_segmented_expression(&exp); |
1173 | if (*input_line_pointer == ',') { | |
1174 | input_line_pointer ++; | |
1175 | temp_fill = get_absolute_expression (); | |
1176 | } else | |
f8701a3f | 1177 | temp_fill = 0; |
fecd2382 RP |
1178 | if (! need_pass_2) { |
1179 | if (segment != now_seg && segment != SEG_ABSOLUTE) | |
1180 | as_bad("Invalid segment \"%s\". Segment \"%s\" assumed.", | |
1181 | segment_name(segment), segment_name(now_seg)); | |
1182 | p = frag_var (rs_org, 1, 1, (relax_substateT)0, exp . X_add_symbol, | |
1183 | exp . X_add_number, (char *)0); | |
1184 | * p = temp_fill; | |
1185 | } /* if (ok to make frag) */ | |
1186 | demand_empty_rest_of_line(); | |
1187 | } /* s_org() */ | |
1188 | ||
1189 | void s_set() { | |
1190 | register char *name; | |
1191 | register char delim; | |
1192 | register char *end_name; | |
1193 | register symbolS *symbolP; | |
f8701a3f | 1194 | |
fecd2382 RP |
1195 | /* |
1196 | * Especial apologies for the random logic: | |
1197 | * this just grew, and could be parsed much more simply! | |
1198 | * Dean in haste. | |
1199 | */ | |
1200 | name = input_line_pointer; | |
1201 | delim = get_symbol_end(); | |
1202 | end_name = input_line_pointer; | |
1203 | *end_name = delim; | |
1204 | SKIP_WHITESPACE(); | |
f8701a3f | 1205 | |
fecd2382 RP |
1206 | if (*input_line_pointer != ',') { |
1207 | *end_name = 0; | |
1208 | as_bad("Expected comma after name \"%s\"", name); | |
1209 | *end_name = delim; | |
1210 | ignore_rest_of_line(); | |
1211 | return; | |
1212 | } | |
f8701a3f | 1213 | |
fecd2382 RP |
1214 | input_line_pointer ++; |
1215 | *end_name = 0; | |
f8701a3f | 1216 | |
fecd2382 RP |
1217 | if (name[0]=='.' && name[1]=='\0') { |
1218 | /* Turn '. = mumble' into a .org mumble */ | |
1219 | register segT segment; | |
1220 | expressionS exp; | |
1221 | register char *ptr; | |
f8701a3f | 1222 | |
fecd2382 | 1223 | segment = get_known_segmented_expression(& exp); |
f8701a3f | 1224 | |
fecd2382 RP |
1225 | if (!need_pass_2) { |
1226 | if (segment != now_seg && segment != SEG_ABSOLUTE) | |
1227 | as_bad("Invalid segment \"%s\". Segment \"%s\" assumed.", | |
f8701a3f SC |
1228 | segment_name(segment), |
1229 | segment_name (now_seg)); | |
fecd2382 RP |
1230 | ptr = frag_var(rs_org, 1, 1, (relax_substateT)0, exp.X_add_symbol, |
1231 | exp.X_add_number, (char *)0); | |
1232 | *ptr= 0; | |
1233 | } /* if (ok to make frag) */ | |
f8701a3f | 1234 | |
fecd2382 RP |
1235 | *end_name = delim; |
1236 | return; | |
1237 | } | |
f8701a3f | 1238 | |
fecd2382 RP |
1239 | if ((symbolP = symbol_find(name)) == NULL |
1240 | && (symbolP = md_undefined_symbol(name)) == NULL) { | |
1241 | symbolP = symbol_new(name, | |
1242 | SEG_UNKNOWN, | |
1243 | 0, | |
1244 | &zero_address_frag); | |
1245 | #ifdef OBJ_COFF | |
1246 | /* "set" symbols are local unless otherwise specified. */ | |
1247 | SF_SET_LOCAL(symbolP); | |
1248 | #endif /* OBJ_COFF */ | |
f8701a3f | 1249 | |
fecd2382 | 1250 | } /* make a new symbol */ |
f8701a3f | 1251 | |
fecd2382 | 1252 | symbol_table_insert(symbolP); |
f8701a3f | 1253 | |
fecd2382 RP |
1254 | *end_name = delim; |
1255 | pseudo_set(symbolP); | |
1256 | demand_empty_rest_of_line(); | |
1257 | } /* s_set() */ | |
1258 | ||
b53ccaac ILT |
1259 | void s_space(mult) |
1260 | int mult; | |
1261 | { | |
fecd2382 RP |
1262 | long temp_repeat; |
1263 | register long temp_fill; | |
1264 | register char *p; | |
f8701a3f | 1265 | |
fecd2382 RP |
1266 | /* Just like .fill, but temp_size = 1 */ |
1267 | if (get_absolute_expression_and_terminator(& temp_repeat) == ',') { | |
1268 | temp_fill = get_absolute_expression (); | |
1269 | } else { | |
1270 | input_line_pointer --; /* Backup over what was not a ','. */ | |
1271 | temp_fill = 0; | |
1272 | } | |
b53ccaac ILT |
1273 | if(mult) |
1274 | { | |
1275 | temp_fill *= mult; | |
1276 | } | |
fecd2382 RP |
1277 | if (temp_repeat <= 0) { |
1278 | as_warn("Repeat < 0, .space ignored"); | |
1279 | ignore_rest_of_line(); | |
1280 | return; | |
1281 | } | |
1282 | if (! need_pass_2) { | |
1283 | p = frag_var (rs_fill, 1, 1, (relax_substateT)0, (symbolS *)0, | |
f8701a3f | 1284 | temp_repeat, (char *)0); |
fecd2382 RP |
1285 | * p = temp_fill; |
1286 | } | |
1287 | demand_empty_rest_of_line(); | |
1288 | } /* s_space() */ | |
1289 | ||
1290 | void | |
f8701a3f | 1291 | s_text() |
fecd2382 RP |
1292 | { |
1293 | register int temp; | |
f8701a3f | 1294 | |
fecd2382 | 1295 | temp = get_absolute_expression (); |
a39116f1 RP |
1296 | #ifdef MANY_SEGMENTS |
1297 | subseg_new (SEG_E0, (subsegT)temp); | |
1298 | #else | |
fecd2382 | 1299 | subseg_new (SEG_TEXT, (subsegT)temp); |
a39116f1 | 1300 | #endif |
fecd2382 RP |
1301 | demand_empty_rest_of_line(); |
1302 | } /* s_text() */ | |
1303 | ||
1304 | \f | |
1305 | /*(JF was static, but can't be if machine dependent pseudo-ops are to use it */ | |
1306 | ||
1307 | void demand_empty_rest_of_line() { | |
1308 | SKIP_WHITESPACE(); | |
1309 | if (is_end_of_line [*input_line_pointer]) { | |
1310 | input_line_pointer++; | |
1311 | } else { | |
1312 | ignore_rest_of_line(); | |
1313 | } | |
1314 | /* Return having already swallowed end-of-line. */ | |
1315 | } /* Return pointing just after end-of-line. */ | |
1316 | ||
1317 | void | |
f8701a3f | 1318 | ignore_rest_of_line() /* For suspect lines: gives warning. */ |
fecd2382 | 1319 | { |
f8701a3f SC |
1320 | if (! is_end_of_line [* input_line_pointer]) |
1321 | { | |
1322 | if (isprint(*input_line_pointer)) | |
1323 | as_bad("Rest of line ignored. First ignored character is `%c'.", | |
1324 | *input_line_pointer); | |
1325 | else | |
1326 | as_bad("Rest of line ignored. First ignored character valued 0x%x.", | |
1327 | *input_line_pointer); | |
1328 | while (input_line_pointer < buffer_limit | |
1329 | && ! is_end_of_line [* input_line_pointer]) | |
1330 | { | |
1331 | input_line_pointer ++; | |
1332 | } | |
1333 | } | |
1334 | input_line_pointer ++; /* Return pointing just after end-of-line. */ | |
1335 | know(is_end_of_line [input_line_pointer [-1]]); | |
fecd2382 RP |
1336 | } |
1337 | ||
1338 | /* | |
1339 | * pseudo_set() | |
1340 | * | |
1341 | * In: Pointer to a symbol. | |
1342 | * Input_line_pointer->expression. | |
1343 | * | |
1344 | * Out: Input_line_pointer->just after any whitespace after expression. | |
1345 | * Tried to set symbol to value of expression. | |
1346 | * Will change symbols type, value, and frag; | |
1347 | * May set need_pass_2 == 1. | |
1348 | */ | |
1349 | void | |
f8701a3f SC |
1350 | pseudo_set (symbolP) |
1351 | symbolS * symbolP; | |
fecd2382 | 1352 | { |
f8701a3f SC |
1353 | expressionS exp; |
1354 | register segT segment; | |
fecd2382 | 1355 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) |
f8701a3f | 1356 | int ext; |
fecd2382 | 1357 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
f8701a3f SC |
1358 | |
1359 | know(symbolP); /* NULL pointer is logic error. */ | |
fecd2382 | 1360 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) |
f8701a3f | 1361 | ext=S_IS_EXTERNAL(symbolP); |
fecd2382 | 1362 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
f8701a3f SC |
1363 | |
1364 | if ((segment = expression(& exp)) == SEG_ABSENT) | |
1365 | { | |
1366 | as_bad("Missing expression: absolute 0 assumed"); | |
1367 | exp . X_seg = SEG_ABSOLUTE; | |
1368 | exp . X_add_number = 0; | |
1369 | } | |
1370 | ||
1371 | switch (segment) | |
1372 | { | |
1373 | case SEG_REGISTER: | |
1374 | S_SET_SEGMENT(symbolP, SEG_REGISTER); | |
1375 | S_SET_VALUE(symbolP, exp.X_add_number); | |
1376 | symbolP->sy_frag = & zero_address_frag; | |
1377 | break; | |
1378 | ||
1379 | case SEG_BIG: | |
1380 | as_bad("%s number invalid. Absolute 0 assumed.", | |
1381 | exp . X_add_number > 0 ? "Bignum" : "Floating-Point"); | |
1382 | S_SET_SEGMENT(symbolP, SEG_ABSOLUTE); | |
fecd2382 | 1383 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) |
f8701a3f SC |
1384 | ext ? S_SET_EXTERNAL(symbolP) : |
1385 | S_CLEAR_EXTERNAL(symbolP); | |
fecd2382 | 1386 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
f8701a3f SC |
1387 | S_SET_VALUE(symbolP, 0); |
1388 | symbolP->sy_frag = & zero_address_frag; | |
1389 | break; | |
1390 | ||
1391 | case SEG_ABSENT: | |
1392 | as_warn("No expression: Using absolute 0"); | |
1393 | S_SET_SEGMENT(symbolP, SEG_ABSOLUTE); | |
fecd2382 | 1394 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) |
f8701a3f SC |
1395 | ext ? S_SET_EXTERNAL(symbolP) : |
1396 | S_CLEAR_EXTERNAL(symbolP); | |
fecd2382 | 1397 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
f8701a3f SC |
1398 | S_SET_VALUE(symbolP, 0); |
1399 | symbolP->sy_frag = & zero_address_frag; | |
1400 | break; | |
1401 | ||
1402 | case SEG_DIFFERENCE: | |
1403 | if (exp.X_add_symbol && exp.X_subtract_symbol | |
1404 | && (S_GET_SEGMENT(exp.X_add_symbol) == | |
1405 | S_GET_SEGMENT(exp.X_subtract_symbol))) { | |
1406 | if (exp.X_add_symbol->sy_frag != exp.X_subtract_symbol->sy_frag) { | |
1407 | as_bad("Unknown expression: symbols %s and %s are in different frags.", | |
1408 | S_GET_NAME(exp.X_add_symbol), S_GET_NAME(exp.X_subtract_symbol)); | |
1409 | need_pass_2++; | |
1410 | } | |
1411 | exp.X_add_number+=S_GET_VALUE(exp.X_add_symbol) - | |
1412 | S_GET_VALUE(exp.X_subtract_symbol); | |
1413 | } else | |
1414 | as_bad("Complex expression. Absolute segment assumed."); | |
1415 | case SEG_ABSOLUTE: | |
1416 | S_SET_SEGMENT(symbolP, SEG_ABSOLUTE); | |
fecd2382 | 1417 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) |
f8701a3f SC |
1418 | ext ? S_SET_EXTERNAL(symbolP) : |
1419 | S_CLEAR_EXTERNAL(symbolP); | |
fecd2382 | 1420 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
f8701a3f SC |
1421 | S_SET_VALUE(symbolP, exp.X_add_number); |
1422 | symbolP->sy_frag = & zero_address_frag; | |
1423 | break; | |
1424 | ||
1425 | default: | |
a39116f1 | 1426 | #ifdef MANY_SEGMENTS |
f8701a3f | 1427 | S_SET_SEGMENT(symbolP, segment); |
a39116f1 | 1428 | #else |
f8701a3f SC |
1429 | switch(segment) { |
1430 | case SEG_DATA: S_SET_SEGMENT(symbolP, SEG_DATA); break; | |
1431 | case SEG_TEXT: S_SET_SEGMENT(symbolP, SEG_TEXT); break; | |
1432 | case SEG_BSS: S_SET_SEGMENT(symbolP, SEG_BSS); break; | |
1433 | ||
1434 | default: as_fatal("failed sanity check."); | |
1435 | } /* switch on segment */ | |
a39116f1 | 1436 | #endif |
fecd2382 | 1437 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) |
f8701a3f SC |
1438 | if (ext) { |
1439 | S_SET_EXTERNAL(symbolP); | |
1440 | } else { | |
1441 | S_CLEAR_EXTERNAL(symbolP); | |
1442 | } /* if external */ | |
fecd2382 | 1443 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
f8701a3f SC |
1444 | |
1445 | S_SET_VALUE(symbolP, exp.X_add_number + S_GET_VALUE(exp.X_add_symbol)); | |
1446 | symbolP->sy_frag = exp . X_add_symbol->sy_frag; | |
1447 | break; | |
1448 | ||
1449 | case SEG_PASS1: /* Not an error. Just try another pass. */ | |
1450 | symbolP->sy_forward=exp.X_add_symbol; | |
1451 | as_bad("Unknown expression"); | |
1452 | know(need_pass_2 == 1); | |
1453 | break; | |
1454 | ||
1455 | case SEG_UNKNOWN: | |
1456 | symbolP->sy_forward=exp.X_add_symbol; | |
1457 | /* as_warn("unknown symbol"); */ | |
1458 | /* need_pass_2 = 1; */ | |
1459 | break; | |
1460 | ||
1461 | ||
1462 | ||
1463 | } | |
fecd2382 RP |
1464 | } |
1465 | \f | |
1466 | /* | |
1467 | * cons() | |
1468 | * | |
1469 | * CONStruct more frag of .bytes, or .words etc. | |
1470 | * Should need_pass_2 be 1 then emit no frag(s). | |
1471 | * This understands EXPRESSIONS, as opposed to big_cons(). | |
1472 | * | |
1473 | * Bug (?) | |
1474 | * | |
1475 | * This has a split personality. We use expression() to read the | |
1476 | * value. We can detect if the value won't fit in a byte or word. | |
1477 | * But we can't detect if expression() discarded significant digits | |
1478 | * in the case of a long. Not worth the crocks required to fix it. | |
1479 | */ | |
1480 | ||
f8701a3f SC |
1481 | /* worker to do .byte etc statements */ |
1482 | /* clobbers input_line_pointer, checks */ | |
1483 | /* end-of-line. */ | |
fecd2382 RP |
1484 | void cons(nbytes) |
1485 | register unsigned int nbytes; /* 1=.byte, 2=.word, 4=.long */ | |
1486 | { | |
f8701a3f SC |
1487 | register char c; |
1488 | register long mask; /* High-order bits we will left-truncate, */ | |
1489 | /* but includes sign bit also. */ | |
1490 | register long get; /* what we get */ | |
1491 | register long use; /* get after truncation. */ | |
1492 | register long unmask; /* what bits we will store */ | |
1493 | register char * p; | |
1494 | register segT segment; | |
1495 | expressionS exp; | |
1496 | ||
1497 | /* | |
1498 | * Input_line_pointer->1st char after pseudo-op-code and could legally | |
1499 | * be a end-of-line. (Or, less legally an eof - which we cope with.) | |
1500 | */ | |
1501 | /* JF << of >= number of bits in the object is undefined. In particular | |
1502 | SPARC (Sun 4) has problems */ | |
1503 | ||
1504 | if (nbytes>=sizeof(long)) { | |
1505 | mask = 0; | |
1506 | } else { | |
1507 | mask = ~0 << (BITS_PER_CHAR * nbytes); /* Don't store these bits. */ | |
1508 | } /* bigger than a long */ | |
1509 | ||
1510 | unmask = ~mask; /* Do store these bits. */ | |
1511 | ||
fecd2382 | 1512 | #ifdef NEVER |
f8701a3f SC |
1513 | "Do this mod if you want every overflow check to assume SIGNED 2's complement data."; |
1514 | mask = ~ (unmask >> 1); /* Includes sign bit now. */ | |
fecd2382 | 1515 | #endif |
f8701a3f SC |
1516 | |
1517 | /* | |
1518 | * The following awkward logic is to parse ZERO or more expressions, | |
1519 | * comma seperated. Recall an expression includes its leading & | |
1520 | * trailing blanks. We fake a leading ',' if there is (supposed to | |
1521 | * be) a 1st expression, and keep demanding 1 expression for each ','. | |
1522 | */ | |
1523 | if (is_it_end_of_statement()) { | |
1524 | c = 0; /* Skip loop. */ | |
1525 | input_line_pointer++; /* Matches end-of-loop 'correction'. */ | |
1526 | } else { | |
1527 | c = ','; | |
1528 | } /* if the end else fake it */ | |
1529 | ||
1530 | /* Do loop. */ | |
1531 | while (c == ',') { | |
fecd2382 | 1532 | #ifdef WANT_BITFIELDS |
f8701a3f SC |
1533 | unsigned int bits_available = BITS_PER_CHAR * nbytes; |
1534 | /* used for error messages and rescanning */ | |
1535 | char *hold = input_line_pointer; | |
fecd2382 | 1536 | #endif /* WANT_BITFIELDS */ |
f8701a3f SC |
1537 | #ifdef MRI |
1538 | if (*input_line_pointer == '\'') | |
1539 | { | |
1540 | /* An MRI style string, cut into as many bytes as will fit | |
1541 | into a nbyte chunk, left justify if necessary, and sepatate | |
1542 | with commas so we can try again later */ | |
1543 | int scan = 0; | |
1544 | unsigned int result = 0; | |
1545 | input_line_pointer++; | |
1546 | for (scan = 0; scan < nbytes; scan++) | |
1547 | { | |
1548 | if (*input_line_pointer == '\'') | |
1549 | { | |
1550 | if (input_line_pointer[1] == '\'') | |
1551 | { | |
1552 | input_line_pointer++; | |
1553 | } | |
1554 | else | |
1555 | break; | |
1556 | } | |
1557 | result = (result << 8) | (*input_line_pointer++); | |
1558 | } | |
1559 | ||
1560 | /* Left justify */ | |
1561 | while (scan < nbytes) | |
1562 | { | |
1563 | result <<=8; | |
1564 | scan++; | |
1565 | } | |
1566 | /* Create correct expression */ | |
1567 | exp.X_add_symbol = 0; | |
1568 | exp.X_add_number = result; | |
1569 | exp.X_seg = segment = SEG_ABSOLUTE; | |
1570 | /* Fake it so that we can read the next char too */ | |
1571 | if (input_line_pointer[0] != '\'' || | |
1572 | (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\'')) | |
1573 | { | |
1574 | input_line_pointer-=2; | |
1575 | input_line_pointer[0] = ','; | |
1576 | input_line_pointer[1] = '\''; | |
1577 | } | |
1578 | else | |
1579 | input_line_pointer++; | |
1580 | ||
1581 | } | |
1582 | else | |
1583 | #endif | |
1584 | /* At least scan over the expression. */ | |
1585 | segment = expression(&exp); | |
1586 | ||
a39116f1 | 1587 | #ifdef WANT_BITFIELDS |
f8701a3f SC |
1588 | /* Some other assemblers, (eg, asm960), allow |
1589 | bitfields after ".byte" as w:x,y:z, where w and | |
1590 | y are bitwidths and x and y are values. They | |
1591 | then pack them all together. We do a little | |
1592 | better in that we allow them in words, longs, | |
1593 | etc. and we'll pack them in target byte order | |
1594 | for you. | |
1595 | ||
1596 | The rules are: pack least significat bit first, | |
1597 | if a field doesn't entirely fit, put it in the | |
1598 | next unit. Overflowing the bitfield is | |
1599 | explicitly *not* even a warning. The bitwidth | |
1600 | should be considered a "mask". | |
1601 | ||
1602 | FIXME-SOMEDAY: If this is considered generally | |
1603 | useful, this logic should probably be reworked. | |
1604 | xoxorich. */ | |
1605 | ||
1606 | if (*input_line_pointer == ':') { /* bitfields */ | |
1607 | long value = 0; | |
1608 | ||
1609 | for (;;) { | |
1610 | unsigned long width; | |
1611 | ||
1612 | if (*input_line_pointer != ':') { | |
1613 | input_line_pointer = hold; | |
1614 | break; | |
1615 | } /* next piece is not a bitfield */ | |
1616 | ||
1617 | /* In the general case, we can't allow | |
1618 | full expressions with symbol | |
1619 | differences and such. The relocation | |
1620 | entries for symbols not defined in this | |
1621 | assembly would require arbitrary field | |
1622 | widths, positions, and masks which most | |
1623 | of our current object formats don't | |
1624 | support. | |
1625 | ||
1626 | In the specific case where a symbol | |
1627 | *is* defined in this assembly, we | |
1628 | *could* build fixups and track it, but | |
1629 | this could lead to confusion for the | |
1630 | backends. I'm lazy. I'll take any | |
1631 | SEG_ABSOLUTE. I think that means that | |
1632 | you can use a previous .set or | |
1633 | .equ type symbol. xoxorich. */ | |
1634 | ||
1635 | if (segment == SEG_ABSENT) { | |
1636 | as_warn("Using a bit field width of zero."); | |
1637 | exp.X_add_number = 0; | |
1638 | segment = SEG_ABSOLUTE; | |
1639 | } /* implied zero width bitfield */ | |
1640 | ||
1641 | if (segment != SEG_ABSOLUTE) { | |
1642 | *input_line_pointer = '\0'; | |
1643 | as_bad("Field width \"%s\" too complex for a bitfield.\n", hold); | |
1644 | *input_line_pointer = ':'; | |
1645 | demand_empty_rest_of_line(); | |
1646 | return; | |
1647 | } /* too complex */ | |
1648 | ||
1649 | if ((width = exp.X_add_number) > (BITS_PER_CHAR * nbytes)) { | |
1650 | as_warn("Field width %d too big to fit in %d bytes: truncated to %d bits.", | |
1651 | width, nbytes, (BITS_PER_CHAR * nbytes)); | |
1652 | width = BITS_PER_CHAR * nbytes; | |
1653 | } /* too big */ | |
1654 | ||
1655 | if (width > bits_available) { | |
1656 | /* FIXME-SOMEDAY: backing up and | |
1657 | reparsing is wasteful */ | |
1658 | input_line_pointer = hold; | |
1659 | exp.X_add_number = value; | |
1660 | break; | |
1661 | } /* won't fit */ | |
1662 | ||
1663 | hold = ++input_line_pointer; /* skip ':' */ | |
1664 | ||
1665 | if ((segment = expression(&exp)) != SEG_ABSOLUTE) { | |
1666 | char cache = *input_line_pointer; | |
1667 | ||
1668 | *input_line_pointer = '\0'; | |
1669 | as_bad("Field value \"%s\" too complex for a bitfield.\n", hold); | |
1670 | *input_line_pointer = cache; | |
1671 | demand_empty_rest_of_line(); | |
1672 | return; | |
1673 | } /* too complex */ | |
1674 | ||
1675 | value |= (~(-1 << width) & exp.X_add_number) | |
1676 | << ((BITS_PER_CHAR * nbytes) - bits_available); | |
1677 | ||
1678 | if ((bits_available -= width) == 0 | |
1679 | || is_it_end_of_statement() | |
1680 | || *input_line_pointer != ',') { | |
1681 | break; | |
1682 | } /* all the bitfields we're gonna get */ | |
1683 | ||
1684 | hold = ++input_line_pointer; | |
1685 | segment = expression(&exp); | |
1686 | } /* forever loop */ | |
1687 | ||
1688 | exp.X_add_number = value; | |
1689 | segment = SEG_ABSOLUTE; | |
1690 | } /* if looks like a bitfield */ | |
a39116f1 | 1691 | #endif /* WANT_BITFIELDS */ |
f8701a3f SC |
1692 | |
1693 | if (!need_pass_2) { /* Still worthwhile making frags. */ | |
1694 | ||
1695 | /* Don't call this if we are going to junk this pass anyway! */ | |
1696 | know(segment != SEG_PASS1); | |
1697 | ||
1698 | if (segment == SEG_DIFFERENCE && exp.X_add_symbol == NULL) { | |
1699 | as_bad("Subtracting symbol \"%s\"(segment\"%s\") is too hard. Absolute segment assumed.", | |
1700 | S_GET_NAME(exp.X_subtract_symbol), | |
1701 | segment_name(S_GET_SEGMENT(exp.X_subtract_symbol))); | |
1702 | segment = SEG_ABSOLUTE; | |
1703 | /* Leave exp . X_add_number alone. */ | |
1704 | } | |
1705 | p = frag_more(nbytes); | |
1706 | switch (segment) { | |
1707 | case SEG_BIG: | |
1708 | as_bad("%s number invalid. Absolute 0 assumed.", | |
1709 | exp . X_add_number > 0 ? "Bignum" : "Floating-Point"); | |
1710 | md_number_to_chars (p, (long)0, nbytes); | |
1711 | break; | |
1712 | ||
1713 | case SEG_ABSENT: | |
1714 | as_warn("0 assumed for missing expression"); | |
1715 | exp . X_add_number = 0; | |
1716 | know(exp . X_add_symbol == NULL); | |
1717 | /* fall into SEG_ABSOLUTE */ | |
1718 | case SEG_ABSOLUTE: | |
1719 | get = exp . X_add_number; | |
1720 | use = get & unmask; | |
1721 | if ((get & mask) && (get & mask) != mask) | |
1722 | { /* Leading bits contain both 0s & 1s. */ | |
1723 | as_warn("Value 0x%x truncated to 0x%x.", get, use); | |
1724 | } | |
1725 | md_number_to_chars (p, use, nbytes); /* put bytes in right order. */ | |
1726 | break; | |
1727 | ||
1728 | case SEG_DIFFERENCE: | |
fecd2382 | 1729 | #ifndef WORKING_DOT_WORD |
f8701a3f SC |
1730 | if (nbytes==2) { |
1731 | struct broken_word *x; | |
1732 | ||
1733 | x=(struct broken_word *)xmalloc(sizeof(struct broken_word)); | |
1734 | x->next_broken_word=broken_words; | |
1735 | broken_words=x; | |
1736 | x->frag=frag_now; | |
1737 | x->word_goes_here=p; | |
1738 | x->dispfrag=0; | |
1739 | x->add=exp.X_add_symbol; | |
1740 | x->sub=exp.X_subtract_symbol; | |
1741 | x->addnum=exp.X_add_number; | |
1742 | x->added=0; | |
1743 | new_broken_words++; | |
1744 | break; | |
1745 | } | |
1746 | /* Else Fall through into. . . */ | |
fecd2382 | 1747 | #endif |
f8701a3f SC |
1748 | default: |
1749 | case SEG_UNKNOWN: | |
fecd2382 | 1750 | #ifdef TC_NS32K |
f8701a3f SC |
1751 | fix_new_ns32k (frag_now, p - frag_now->fr_literal, nbytes, |
1752 | exp . X_add_symbol, exp . X_subtract_symbol, | |
1753 | exp . X_add_number, 0, 0, 2, 0, 0); | |
fecd2382 | 1754 | #else |
f8701a3f SC |
1755 | # if defined(TC_SPARC) || defined(TC_A29K) |
1756 | fix_new (frag_now, p - frag_now->fr_literal, nbytes, | |
1757 | exp . X_add_symbol, exp . X_subtract_symbol, | |
1758 | exp . X_add_number, 0, RELOC_32); | |
1759 | # else | |
1760 | # if defined(TC_H8300) | |
1761 | fix_new (frag_now, p - frag_now->fr_literal, nbytes, | |
1762 | exp . X_add_symbol, exp . X_subtract_symbol, | |
1763 | exp . X_add_number, 0, R_RELWORD); | |
1764 | ||
1765 | # else | |
1766 | fix_new (frag_now, p - frag_now->fr_literal, nbytes, | |
1767 | exp . X_add_symbol, exp . X_subtract_symbol, | |
1768 | exp . X_add_number, 0, 0); | |
1769 | ||
1770 | # endif /* tc_h8300 */ | |
1771 | # endif /* tc_sparc|tc_a29k */ | |
fecd2382 | 1772 | #endif /* TC_NS32K */ |
f8701a3f SC |
1773 | break; |
1774 | } /* switch(segment) */ | |
1775 | } /* if (!need_pass_2) */ | |
1776 | c = *input_line_pointer++; | |
1777 | } /* while(c==',') */ | |
1778 | input_line_pointer--; /* Put terminator back into stream. */ | |
1779 | demand_empty_rest_of_line(); | |
fecd2382 RP |
1780 | } /* cons() */ |
1781 | \f | |
1782 | /* | |
1783 | * big_cons() | |
1784 | * | |
1785 | * CONStruct more frag(s) of .quads, or .octa etc. | |
1786 | * Makes 0 or more new frags. | |
1787 | * If need_pass_2 == 1, generate no frag. | |
1788 | * This understands only bignums, not expressions. Cons() understands | |
1789 | * expressions. | |
1790 | * | |
1791 | * Constants recognised are '0...'(octal) '0x...'(hex) '...'(decimal). | |
1792 | * | |
1793 | * This creates objects with struct obstack_control objs, destroying | |
1794 | * any context objs held about a partially completed object. Beware! | |
1795 | * | |
1796 | * | |
1797 | * I think it sucks to have 2 different types of integers, with 2 | |
1798 | * routines to read them, store them etc. | |
1799 | * It would be nicer to permit bignums in expressions and only | |
1800 | * complain if the result overflowed. However, due to "efficiency"... | |
1801 | */ | |
1802 | /* worker to do .quad etc statements */ | |
1803 | /* clobbers input_line_pointer, checks */ | |
1804 | /* end-of-line. */ | |
1805 | /* 8=.quad 16=.octa ... */ | |
1806 | ||
1807 | void big_cons(nbytes) | |
f8701a3f | 1808 | register int nbytes; |
fecd2382 | 1809 | { |
f8701a3f SC |
1810 | register char c; /* input_line_pointer->c. */ |
1811 | register int radix; | |
1812 | register long length; /* Number of chars in an object. */ | |
1813 | register int digit; /* Value of 1 digit. */ | |
1814 | register int carry; /* For multi-precision arithmetic. */ | |
1815 | register int work; /* For multi-precision arithmetic. */ | |
1816 | register char * p; /* For multi-precision arithmetic. */ | |
1817 | ||
1818 | extern char hex_value[]; /* In hex_value.c. */ | |
1819 | ||
1820 | /* | |
1821 | * The following awkward logic is to parse ZERO or more strings, | |
1822 | * comma seperated. Recall an expression includes its leading & | |
1823 | * trailing blanks. We fake a leading ',' if there is (supposed to | |
1824 | * be) a 1st expression, and keep demanding 1 expression for each ','. | |
1825 | */ | |
1826 | if (is_it_end_of_statement()) | |
1827 | { | |
1828 | c = 0; /* Skip loop. */ | |
1829 | } | |
1830 | else | |
1831 | { | |
1832 | c = ','; /* Do loop. */ | |
1833 | -- input_line_pointer; | |
1834 | } | |
1835 | while (c == ',') | |
1836 | { | |
1837 | ++ input_line_pointer; | |
1838 | SKIP_WHITESPACE(); | |
1839 | c = * input_line_pointer; | |
1840 | /* C contains 1st non-blank character of what we hope is a number. */ | |
1841 | if (c == '0') | |
1842 | { | |
1843 | c = * ++ input_line_pointer; | |
1844 | if (c == 'x' || c=='X') | |
fecd2382 | 1845 | { |
f8701a3f SC |
1846 | c = * ++ input_line_pointer; |
1847 | radix = 16; | |
fecd2382 | 1848 | } |
f8701a3f | 1849 | else |
fecd2382 | 1850 | { |
f8701a3f | 1851 | radix = 8; |
fecd2382 | 1852 | } |
f8701a3f SC |
1853 | } |
1854 | else | |
1855 | { | |
1856 | radix = 10; | |
1857 | } | |
1858 | /* | |
1859 | * This feature (?) is here to stop people worrying about | |
1860 | * mysterious zero constants: which is what they get when | |
1861 | * they completely omit digits. | |
1862 | */ | |
1863 | if (hex_value[c] >= radix) { | |
1864 | as_bad("Missing digits. 0 assumed."); | |
1865 | } | |
1866 | bignum_high = bignum_low - 1; /* Start constant with 0 chars. */ | |
1867 | for(; (digit = hex_value [c]) < radix; c = * ++ input_line_pointer) | |
1868 | { | |
1869 | /* Multiply existing number by radix, then add digit. */ | |
1870 | carry = digit; | |
1871 | for (p=bignum_low; p <= bignum_high; p++) | |
fecd2382 | 1872 | { |
f8701a3f SC |
1873 | work = (*p & MASK_CHAR) * radix + carry; |
1874 | *p = work & MASK_CHAR; | |
1875 | carry = work >> BITS_PER_CHAR; | |
fecd2382 | 1876 | } |
f8701a3f SC |
1877 | if (carry) |
1878 | { | |
1879 | grow_bignum(); | |
1880 | * bignum_high = carry & MASK_CHAR; | |
1881 | know((carry & ~ MASK_CHAR) == 0); | |
1882 | } | |
1883 | } | |
1884 | length = bignum_high - bignum_low + 1; | |
1885 | if (length > nbytes) | |
1886 | { | |
1887 | as_warn("Most significant bits truncated in integer constant."); | |
1888 | } | |
1889 | else | |
1890 | { | |
1891 | register long leading_zeroes; | |
fecd2382 | 1892 | |
f8701a3f SC |
1893 | for(leading_zeroes = nbytes - length; |
1894 | leading_zeroes; | |
1895 | leading_zeroes --) | |
a39116f1 | 1896 | { |
f8701a3f SC |
1897 | grow_bignum(); |
1898 | * bignum_high = 0; | |
a39116f1 | 1899 | } |
f8701a3f SC |
1900 | } |
1901 | if (! need_pass_2) | |
1902 | { | |
1903 | p = frag_more (nbytes); | |
1904 | bcopy (bignum_low, p, (int)nbytes); | |
1905 | } | |
1906 | /* C contains character after number. */ | |
1907 | SKIP_WHITESPACE(); | |
1908 | c = * input_line_pointer; | |
1909 | /* C contains 1st non-blank character after number. */ | |
1910 | } | |
1911 | demand_empty_rest_of_line(); | |
1912 | } /* big_cons() */ | |
1913 | ||
1914 | /* Extend bignum by 1 char. */ | |
1915 | static void grow_bignum() { | |
1916 | register long length; | |
1917 | ||
1918 | bignum_high ++; | |
1919 | if (bignum_high >= bignum_limit) | |
1920 | { | |
1921 | length = bignum_limit - bignum_low; | |
1922 | bignum_low = xrealloc(bignum_low, length + length); | |
1923 | bignum_high = bignum_low + length; | |
1924 | bignum_limit = bignum_low + length + length; | |
1925 | } | |
fecd2382 RP |
1926 | } /* grow_bignum(); */ |
1927 | \f | |
1928 | /* | |
1929 | * float_cons() | |
1930 | * | |
1931 | * CONStruct some more frag chars of .floats .ffloats etc. | |
1932 | * Makes 0 or more new frags. | |
1933 | * If need_pass_2 == 1, no frags are emitted. | |
1934 | * This understands only floating literals, not expressions. Sorry. | |
1935 | * | |
1936 | * A floating constant is defined by atof_generic(), except it is preceded | |
1937 | * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its | |
1938 | * reading, I decided to be incompatible. This always tries to give you | |
1939 | * rounded bits to the precision of the pseudo-op. Former AS did premature | |
1940 | * truncatation, restored noisy bits instead of trailing 0s AND gave you | |
1941 | * a choice of 2 flavours of noise according to which of 2 floating-point | |
1942 | * scanners you directed AS to use. | |
1943 | * | |
1944 | * In: input_line_pointer->whitespace before, or '0' of flonum. | |
1945 | * | |
1946 | */ | |
1947 | ||
1948 | void /* JF was static, but can't be if VAX.C is goning to use it */ | |
f8701a3f SC |
1949 | float_cons(float_type) /* Worker to do .float etc statements. */ |
1950 | /* Clobbers input_line-pointer, checks end-of-line. */ | |
1951 | register int float_type; /* 'f':.ffloat ... 'F':.float ... */ | |
fecd2382 | 1952 | { |
f8701a3f SC |
1953 | register char * p; |
1954 | register char c; | |
1955 | int length; /* Number of chars in an object. */ | |
1956 | register char * err; /* Error from scanning floating literal. */ | |
1957 | char temp [MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; | |
1958 | ||
1959 | /* | |
1960 | * The following awkward logic is to parse ZERO or more strings, | |
1961 | * comma seperated. Recall an expression includes its leading & | |
1962 | * trailing blanks. We fake a leading ',' if there is (supposed to | |
1963 | * be) a 1st expression, and keep demanding 1 expression for each ','. | |
1964 | */ | |
1965 | if (is_it_end_of_statement()) | |
1966 | { | |
1967 | c = 0; /* Skip loop. */ | |
1968 | ++ input_line_pointer; /*->past termintor. */ | |
1969 | } | |
1970 | else | |
1971 | { | |
1972 | c = ','; /* Do loop. */ | |
1973 | } | |
1974 | while (c == ',') | |
1975 | { | |
1976 | /* input_line_pointer->1st char of a flonum (we hope!). */ | |
1977 | SKIP_WHITESPACE(); | |
1978 | /* Skip any 0{letter} that may be present. Don't even check if the | |
1979 | * letter is legal. Someone may invent a "z" format and this routine | |
1980 | * has no use for such information. Lusers beware: you get | |
1981 | * diagnostics if your input is ill-conditioned. | |
1982 | */ | |
1983 | ||
1984 | if (input_line_pointer[0]=='0' && isalpha(input_line_pointer[1])) | |
1985 | input_line_pointer+=2; | |
1986 | ||
1987 | err = md_atof (float_type, temp, &length); | |
1988 | know(length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); | |
1989 | know(length > 0); | |
1990 | if (* err) | |
1991 | { | |
1992 | as_bad("Bad floating literal: %s", err); | |
1993 | ignore_rest_of_line(); | |
1994 | /* Input_line_pointer->just after end-of-line. */ | |
1995 | c = 0; /* Break out of loop. */ | |
1996 | } | |
1997 | else | |
1998 | { | |
1999 | if (! need_pass_2) | |
a39116f1 | 2000 | { |
f8701a3f SC |
2001 | p = frag_more (length); |
2002 | bcopy (temp, p, length); | |
a39116f1 | 2003 | } |
f8701a3f SC |
2004 | SKIP_WHITESPACE(); |
2005 | c = * input_line_pointer ++; | |
2006 | /* C contains 1st non-white character after number. */ | |
2007 | /* input_line_pointer->just after terminator (c). */ | |
542e1629 | 2008 | } |
f8701a3f SC |
2009 | } |
2010 | -- input_line_pointer; /*->terminator (is not ','). */ | |
2011 | demand_empty_rest_of_line(); | |
2012 | } /* float_cons() */ | |
fecd2382 RP |
2013 | \f |
2014 | /* | |
2015 | * stringer() | |
2016 | * | |
2017 | * We read 0 or more ',' seperated, double-quoted strings. | |
2018 | * | |
2019 | * Caller should have checked need_pass_2 is FALSE because we don't check it. | |
2020 | */ | |
a39116f1 RP |
2021 | |
2022 | ||
2023 | void stringer(append_zero ) /* Worker to do .ascii etc statements. */ | |
f8701a3f SC |
2024 | /* Checks end-of-line. */ |
2025 | register int append_zero; /* 0: don't append '\0', else 1 */ | |
fecd2382 | 2026 | { |
f8701a3f SC |
2027 | /* register char * p; JF unused */ |
2028 | /* register int length; JF unused */ /* Length of string we read, excluding */ | |
2029 | /* trailing '\0' implied by closing quote. */ | |
2030 | /* register char * where; JF unused */ | |
2031 | /* register fragS * fragP; JF unused */ | |
2032 | register unsigned int c; | |
2033 | ||
2034 | /* | |
2035 | * The following awkward logic is to parse ZERO or more strings, | |
2036 | * comma seperated. Recall a string expression includes spaces | |
2037 | * before the opening '\"' and spaces after the closing '\"'. | |
2038 | * We fake a leading ',' if there is (supposed to be) | |
2039 | * a 1st, expression. We keep demanding expressions for each | |
2040 | * ','. | |
2041 | */ | |
2042 | if (is_it_end_of_statement()) | |
2043 | { | |
2044 | c = 0; /* Skip loop. */ | |
2045 | ++ input_line_pointer; /* Compensate for end of loop. */ | |
2046 | } | |
2047 | else | |
2048 | { | |
2049 | c = ','; /* Do loop. */ | |
2050 | } | |
2051 | while (c == ',' || c == '<' || c == '"' ) { | |
2052 | SKIP_WHITESPACE(); | |
2053 | switch (*input_line_pointer) { | |
2054 | case '\"': | |
2055 | ++input_line_pointer; /*->1st char of string. */ | |
2056 | while (is_a_char(c = next_char_of_string())) { | |
2057 | FRAG_APPEND_1_CHAR(c); | |
2058 | } | |
2059 | if (append_zero) { | |
2060 | FRAG_APPEND_1_CHAR(0); | |
2061 | } | |
2062 | know(input_line_pointer [-1] == '\"'); | |
2063 | break; | |
2064 | case '<': | |
2065 | input_line_pointer++; | |
2066 | c =get_single_number(); | |
2067 | FRAG_APPEND_1_CHAR(c); | |
2068 | if(*input_line_pointer != '>') { | |
2069 | as_bad("Expected <nn>"); | |
2070 | } | |
2071 | input_line_pointer++; | |
2072 | break; | |
2073 | case ',': | |
2074 | input_line_pointer++; | |
2075 | break; | |
2076 | } | |
2077 | SKIP_WHITESPACE(); | |
2078 | c = *input_line_pointer; | |
2079 | } | |
2080 | ||
2081 | demand_empty_rest_of_line(); | |
fecd2382 RP |
2082 | } /* stringer() */ |
2083 | \f | |
f8701a3f SC |
2084 | /* FIXME-SOMEDAY: I had trouble here on characters with the |
2085 | high bits set. We'll probably also have trouble with | |
2086 | multibyte chars, wide chars, etc. Also be careful about | |
2087 | returning values bigger than 1 byte. xoxorich. */ | |
fecd2382 | 2088 | |
f8701a3f | 2089 | unsigned int next_char_of_string() { |
fecd2382 RP |
2090 | register unsigned int c; |
2091 | ||
2092 | c = *input_line_pointer++ & CHAR_MASK; | |
2093 | switch (c) { | |
2094 | case '\"': | |
2095 | c = NOT_A_CHAR; | |
2096 | break; | |
2097 | ||
2098 | case '\\': | |
2099 | switch (c = *input_line_pointer++) { | |
2100 | case 'b': | |
2101 | c = '\b'; | |
2102 | break; | |
2103 | ||
2104 | case 'f': | |
2105 | c = '\f'; | |
2106 | break; | |
2107 | ||
2108 | case 'n': | |
2109 | c = '\n'; | |
2110 | break; | |
2111 | ||
2112 | case 'r': | |
2113 | c = '\r'; | |
2114 | break; | |
2115 | ||
2116 | case 't': | |
2117 | c = '\t'; | |
2118 | break; | |
2119 | ||
2120 | #ifdef BACKSLASH_V | |
2121 | case 'v': | |
2122 | c = '\013'; | |
2123 | break; | |
2124 | #endif | |
2125 | ||
2126 | case '\\': | |
2127 | case '"': | |
2128 | break; /* As itself. */ | |
2129 | ||
2130 | case '0': | |
2131 | case '1': | |
2132 | case '2': | |
2133 | case '3': | |
2134 | case '4': | |
2135 | case '5': | |
2136 | case '6': | |
2137 | case '7': | |
2138 | case '8': | |
2139 | case '9': { | |
2140 | long number; | |
2141 | ||
2142 | for (number = 0; isdigit(c); c = *input_line_pointer++) { | |
2143 | number = number * 8 + c - '0'; | |
2144 | } | |
2145 | c = number & 0xff; | |
2146 | } | |
2147 | --input_line_pointer; | |
2148 | break; | |
2149 | ||
2150 | case '\n': | |
2151 | /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */ | |
2152 | as_warn("Unterminated string: Newline inserted."); | |
2153 | c = '\n'; | |
2154 | break; | |
2155 | ||
2156 | default: | |
2157 | ||
2158 | #ifdef ONLY_STANDARD_ESCAPES | |
2159 | as_bad("Bad escaped character in string, '?' assumed"); | |
2160 | c = '?'; | |
2161 | #endif /* ONLY_STANDARD_ESCAPES */ | |
2162 | ||
2163 | break; | |
2164 | } /* switch on escaped char */ | |
2165 | break; | |
2166 | ||
2167 | default: | |
2168 | break; | |
2169 | } /* switch on char */ | |
2170 | return(c); | |
2171 | } /* next_char_of_string() */ | |
2172 | \f | |
2173 | static segT | |
f8701a3f SC |
2174 | get_segmented_expression (expP) |
2175 | register expressionS * expP; | |
fecd2382 | 2176 | { |
f8701a3f SC |
2177 | register segT retval; |
2178 | ||
2179 | if ((retval = expression(expP)) == SEG_PASS1 || retval == SEG_ABSENT || retval == SEG_BIG) | |
2180 | { | |
2181 | as_bad("Expected address expression: absolute 0 assumed"); | |
2182 | retval = expP->X_seg = SEG_ABSOLUTE; | |
2183 | expP->X_add_number = 0; | |
2184 | expP->X_add_symbol = expP->X_subtract_symbol = 0; | |
2185 | } | |
2186 | return (retval); /* SEG_ ABSOLUTE,UNKNOWN,DATA,TEXT,BSS */ | |
fecd2382 RP |
2187 | } |
2188 | ||
2189 | static segT get_known_segmented_expression(expP) | |
2190 | register expressionS *expP; | |
2191 | { | |
f8701a3f SC |
2192 | register segT retval; |
2193 | register char * name1; | |
2194 | register char * name2; | |
2195 | ||
2196 | if ((retval = get_segmented_expression (expP)) == SEG_UNKNOWN) | |
2197 | { | |
2198 | name1 = expP->X_add_symbol ? S_GET_NAME(expP->X_add_symbol) : ""; | |
2199 | name2 = expP->X_subtract_symbol ? | |
2200 | S_GET_NAME(expP->X_subtract_symbol) : | |
2201 | ""; | |
2202 | if (name1 && name2) | |
2203 | { | |
2204 | as_warn("Symbols \"%s\" \"%s\" are undefined: absolute 0 assumed.", | |
2205 | name1, name2); | |
2206 | } | |
2207 | else | |
2208 | { | |
2209 | as_warn("Symbol \"%s\" undefined: absolute 0 assumed.", | |
2210 | name1 ? name1 : name2); | |
2211 | } | |
2212 | retval = expP->X_seg = SEG_ABSOLUTE; | |
2213 | expP->X_add_number = 0; | |
2214 | expP->X_add_symbol = expP->X_subtract_symbol = NULL; | |
2215 | } | |
a39116f1 | 2216 | #ifndef MANY_SEGMENTS |
f8701a3f | 2217 | know(retval == SEG_ABSOLUTE || retval == SEG_DATA || retval == SEG_TEXT || retval == SEG_BSS || retval == SEG_DIFFERENCE); |
a39116f1 | 2218 | #endif |
f8701a3f SC |
2219 | return (retval); |
2220 | ||
fecd2382 RP |
2221 | } /* get_known_segmented_expression() */ |
2222 | ||
2223 | ||
2224 | ||
2225 | /* static */ long /* JF was static, but can't be if the MD pseudos are to use it */ | |
f8701a3f | 2226 | get_absolute_expression () |
fecd2382 | 2227 | { |
f8701a3f SC |
2228 | expressionS exp; |
2229 | register segT s; | |
2230 | ||
2231 | if ((s = expression(& exp)) != SEG_ABSOLUTE) | |
2232 | { | |
2233 | if (s != SEG_ABSENT) | |
2234 | { | |
2235 | as_bad("Bad Absolute Expression, absolute 0 assumed."); | |
2236 | } | |
2237 | exp . X_add_number = 0; | |
2238 | } | |
2239 | return (exp . X_add_number); | |
fecd2382 RP |
2240 | } |
2241 | ||
2242 | char /* return terminator */ | |
f8701a3f SC |
2243 | get_absolute_expression_and_terminator(val_pointer) |
2244 | long * val_pointer; /* return value of expression */ | |
fecd2382 | 2245 | { |
f8701a3f SC |
2246 | * val_pointer = get_absolute_expression (); |
2247 | return (* input_line_pointer ++); | |
fecd2382 RP |
2248 | } |
2249 | \f | |
2250 | /* | |
2251 | * demand_copy_C_string() | |
2252 | * | |
2253 | * Like demand_copy_string, but return NULL if the string contains any '\0's. | |
2254 | * Give a warning if that happens. | |
2255 | */ | |
2256 | char * | |
f8701a3f SC |
2257 | demand_copy_C_string (len_pointer) |
2258 | int * len_pointer; | |
fecd2382 | 2259 | { |
f8701a3f SC |
2260 | register char * s; |
2261 | ||
2262 | if ((s = demand_copy_string(len_pointer)) != 0) | |
2263 | { | |
2264 | register int len; | |
2265 | ||
2266 | for (len = * len_pointer; | |
2267 | len > 0; | |
2268 | len--) | |
2269 | { | |
2270 | if (* s == 0) | |
fecd2382 | 2271 | { |
f8701a3f SC |
2272 | s = 0; |
2273 | len = 1; | |
2274 | * len_pointer = 0; | |
2275 | as_bad("This string may not contain \'\\0\'"); | |
fecd2382 | 2276 | } |
f8701a3f SC |
2277 | } |
2278 | } | |
2279 | return (s); | |
fecd2382 RP |
2280 | } |
2281 | \f | |
2282 | /* | |
2283 | * demand_copy_string() | |
2284 | * | |
2285 | * Demand string, but return a safe (=private) copy of the string. | |
2286 | * Return NULL if we can't read a string here. | |
2287 | */ | |
2288 | static char *demand_copy_string(lenP) | |
2289 | int *lenP; | |
2290 | { | |
2291 | register unsigned int c; | |
2292 | register int len; | |
2293 | char *retval; | |
2294 | ||
2295 | len = 0; | |
2296 | SKIP_WHITESPACE(); | |
2297 | if (*input_line_pointer == '\"') { | |
2298 | input_line_pointer++; /* Skip opening quote. */ | |
2299 | ||
2300 | while (is_a_char(c = next_char_of_string())) { | |
2301 | obstack_1grow(¬es, c); | |
2302 | len ++; | |
2303 | } | |
2304 | /* JF this next line is so demand_copy_C_string will return a null | |
2305 | termanated string. */ | |
2306 | obstack_1grow(¬es,'\0'); | |
2307 | retval=obstack_finish(¬es); | |
2308 | } else { | |
2309 | as_warn("Missing string"); | |
2310 | retval = NULL; | |
2311 | ignore_rest_of_line(); | |
2312 | } | |
2313 | *lenP = len; | |
2314 | return(retval); | |
2315 | } /* demand_copy_string() */ | |
2316 | \f | |
2317 | /* | |
2318 | * is_it_end_of_statement() | |
2319 | * | |
2320 | * In: Input_line_pointer->next character. | |
2321 | * | |
2322 | * Do: Skip input_line_pointer over all whitespace. | |
2323 | * | |
2324 | * Out: 1 if input_line_pointer->end-of-line. | |
f8701a3f | 2325 | */ |
a39116f1 | 2326 | int is_it_end_of_statement() { |
f8701a3f SC |
2327 | SKIP_WHITESPACE(); |
2328 | return (is_end_of_line [* input_line_pointer]); | |
fecd2382 RP |
2329 | } /* is_it_end_of_statement() */ |
2330 | ||
2331 | void equals(sym_name) | |
2332 | char *sym_name; | |
2333 | { | |
f8701a3f SC |
2334 | register symbolS *symbolP; /* symbol we are working with */ |
2335 | ||
2336 | input_line_pointer++; | |
2337 | if (*input_line_pointer=='=') | |
2338 | input_line_pointer++; | |
2339 | ||
2340 | while(*input_line_pointer==' ' || *input_line_pointer=='\t') | |
2341 | input_line_pointer++; | |
2342 | ||
2343 | if (sym_name[0]=='.' && sym_name[1]=='\0') { | |
2344 | /* Turn '. = mumble' into a .org mumble */ | |
2345 | register segT segment; | |
2346 | expressionS exp; | |
2347 | register char *p; | |
2348 | ||
2349 | segment = get_known_segmented_expression(& exp); | |
2350 | if (! need_pass_2) { | |
2351 | if (segment != now_seg && segment != SEG_ABSOLUTE) | |
2352 | as_warn("Illegal segment \"%s\". Segment \"%s\" assumed.", | |
2353 | segment_name(segment), | |
2354 | segment_name(now_seg)); | |
2355 | p = frag_var(rs_org, 1, 1, (relax_substateT)0, exp.X_add_symbol, | |
2356 | exp.X_add_number, (char *)0); | |
2357 | * p = 0; | |
2358 | } /* if (ok to make frag) */ | |
2359 | } else { | |
2360 | symbolP=symbol_find_or_make(sym_name); | |
2361 | pseudo_set(symbolP); | |
2362 | } | |
fecd2382 RP |
2363 | } /* equals() */ |
2364 | ||
2365 | /* .include -- include a file at this point. */ | |
2366 | ||
2367 | /* ARGSUSED */ | |
2368 | void s_include(arg) | |
2369 | int arg; | |
2370 | { | |
f8701a3f SC |
2371 | char *newbuf; |
2372 | char *filename; | |
2373 | int i; | |
2374 | FILE *try; | |
2375 | char *path; | |
2376 | ||
2377 | filename = demand_copy_string(&i); | |
2378 | demand_empty_rest_of_line(); | |
2379 | path = xmalloc(i + include_dir_maxlen + 5 /* slop */); | |
2380 | for (i = 0; i < include_dir_count; i++) { | |
2381 | strcpy(path, include_dirs[i]); | |
2382 | strcat(path, "/"); | |
2383 | strcat(path, filename); | |
2384 | if (0 != (try = fopen(path, "r"))) | |
2385 | { | |
2386 | fclose (try); | |
2387 | goto gotit; | |
2388 | } | |
2389 | } | |
2390 | free(path); | |
2391 | path = filename; | |
2392 | gotit: | |
2393 | /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */ | |
2394 | newbuf = input_scrub_include_file (path, input_line_pointer); | |
2395 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
fecd2382 RP |
2396 | } /* s_include() */ |
2397 | ||
2398 | void add_include_dir(path) | |
2399 | char *path; | |
2400 | { | |
f8701a3f SC |
2401 | int i; |
2402 | ||
2403 | if (include_dir_count == 0) | |
2404 | { | |
2405 | include_dirs = (char **)xmalloc (2 * sizeof (*include_dirs)); | |
2406 | include_dirs[0] = "."; /* Current dir */ | |
2407 | include_dir_count = 2; | |
2408 | } | |
2409 | else | |
2410 | { | |
2411 | include_dir_count++; | |
2412 | include_dirs = (char **) realloc(include_dirs, | |
2413 | include_dir_count*sizeof (*include_dirs)); | |
2414 | } | |
2415 | ||
2416 | include_dirs[include_dir_count-1] = path; /* New one */ | |
2417 | ||
2418 | i = strlen (path); | |
2419 | if (i > include_dir_maxlen) | |
2420 | include_dir_maxlen = i; | |
fecd2382 RP |
2421 | } /* add_include_dir() */ |
2422 | ||
2423 | void s_ignore(arg) | |
2424 | int arg; | |
2425 | { | |
2426 | extern char is_end_of_line[]; | |
f8701a3f | 2427 | |
fecd2382 RP |
2428 | while (!is_end_of_line[*input_line_pointer]) { |
2429 | ++input_line_pointer; | |
2430 | } | |
2431 | ++input_line_pointer; | |
f8701a3f | 2432 | |
fecd2382 RP |
2433 | return; |
2434 | } /* s_ignore() */ | |
2435 | ||
2436 | /* | |
2437 | * Local Variables: | |
2438 | * comment-column: 0 | |
2439 | * fill-column: 131 | |
2440 | * End: | |
2441 | */ | |
2442 | ||
2443 | /* end of read.c */ |