Commit | Line | Data |
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fecd2382 | 1 | /* symbols.c -symbol table- |
dacf29ea KR |
2 | Copyright (C) 1987, 1990, 1991, 1992, 1993, 1994 |
3 | Free Software Foundation, Inc. | |
6efd877d | 4 | |
a39116f1 | 5 | This file is part of GAS, the GNU Assembler. |
6efd877d | 6 | |
a39116f1 RP |
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) | |
10 | any later version. | |
6efd877d | 11 | |
a39116f1 RP |
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. | |
6efd877d | 16 | |
a39116f1 RP |
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, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
fecd2382 | 20 | |
58d4951d | 21 | /* #define DEBUG_SYMS / * to debug symbol list maintenance */ |
2b68b820 | 22 | |
6efd877d KR |
23 | #include <ctype.h> |
24 | ||
fecd2382 RP |
25 | #include "as.h" |
26 | ||
27 | #include "obstack.h" /* For "symbols.h" */ | |
28 | #include "subsegs.h" | |
29 | ||
30 | #ifndef WORKING_DOT_WORD | |
31 | extern int new_broken_words; | |
32 | #endif | |
fecd2382 | 33 | |
2b68b820 KR |
34 | /* symbol-name => struct symbol pointer */ |
35 | static struct hash_control *sy_hash; | |
fecd2382 | 36 | |
a39116f1 | 37 | /* Below are commented in "symbols.h". */ |
6efd877d KR |
38 | symbolS *symbol_rootP; |
39 | symbolS *symbol_lastP; | |
40 | symbolS abs_symbol; | |
fecd2382 | 41 | |
dacf29ea KR |
42 | #ifdef DEBUG_SYMS |
43 | #define debug_verify_symchain verify_symbol_chain | |
44 | #else | |
45 | #define debug_verify_symchain (void) | |
46 | #endif | |
47 | ||
6efd877d | 48 | struct obstack notes; |
fecd2382 | 49 | |
85825401 | 50 | static void fb_label_init PARAMS ((void)); |
fecd2382 | 51 | |
dacf29ea KR |
52 | /* symbol_new() |
53 | ||
54 | Return a pointer to a new symbol. Die if we can't make a new | |
55 | symbol. Fill in the symbol's values. Add symbol to end of symbol | |
56 | chain. | |
57 | ||
58 | This function should be called in the general case of creating a | |
59 | symbol. However, if the output file symbol table has already been | |
60 | set, and you are certain that this symbol won't be wanted in the | |
61 | output file, you can call symbol_create. */ | |
fecd2382 | 62 | |
6efd877d | 63 | symbolS * |
604633ae | 64 | symbol_new (name, segment, valu, frag) |
dacf29ea KR |
65 | const char *name; |
66 | segT segment; | |
67 | valueT valu; | |
68 | fragS *frag; | |
69 | { | |
70 | symbolS *symbolP = symbol_create (name, segment, valu, frag); | |
71 | ||
72 | /* | |
73 | * Link to end of symbol chain. | |
74 | */ | |
75 | #ifdef BFD_ASSEMBLER | |
76 | { | |
77 | extern int symbol_table_frozen; | |
78 | if (symbol_table_frozen) | |
79 | abort (); | |
80 | } | |
81 | #endif | |
82 | symbol_append (symbolP, symbol_lastP, &symbol_rootP, &symbol_lastP); | |
83 | debug_verify_symchain (symbol_rootP, symbol_lastP); | |
84 | ||
85 | return symbolP; | |
86 | } | |
87 | ||
88 | symbolS * | |
89 | symbol_create (name, segment, valu, frag) | |
90 | const char *name; /* It is copied, the caller can destroy/modify */ | |
6efd877d | 91 | segT segment; /* Segment identifier (SEG_<something>) */ |
604633ae | 92 | valueT valu; /* Symbol value */ |
6efd877d | 93 | fragS *frag; /* Associated fragment */ |
fecd2382 | 94 | { |
6efd877d KR |
95 | unsigned int name_length; |
96 | char *preserved_copy_of_name; | |
97 | symbolS *symbolP; | |
98 | ||
99 | name_length = strlen (name) + 1; /* +1 for \0 */ | |
100 | obstack_grow (¬es, name, name_length); | |
101 | preserved_copy_of_name = obstack_finish (¬es); | |
2b68b820 KR |
102 | #ifdef STRIP_UNDERSCORE |
103 | if (preserved_copy_of_name[0] == '_') | |
104 | preserved_copy_of_name++; | |
105 | #endif | |
dacf29ea KR |
106 | |
107 | #ifdef tc_canonicalize_symbol_name | |
108 | preserved_copy_of_name = | |
109 | tc_canonicalize_symbol_name (preserved_copy_of_name); | |
110 | #endif | |
111 | ||
6efd877d KR |
112 | symbolP = (symbolS *) obstack_alloc (¬es, sizeof (symbolS)); |
113 | ||
114 | /* symbol must be born in some fixed state. This seems as good as any. */ | |
115 | memset (symbolP, 0, sizeof (symbolS)); | |
116 | ||
2b68b820 KR |
117 | #ifdef BFD_ASSEMBLER |
118 | symbolP->bsym = bfd_make_empty_symbol (stdoutput); | |
119 | assert (symbolP->bsym != 0); | |
120 | symbolP->bsym->udata = (PTR) symbolP; | |
121 | #endif | |
6efd877d | 122 | S_SET_NAME (symbolP, preserved_copy_of_name); |
6efd877d KR |
123 | |
124 | S_SET_SEGMENT (symbolP, segment); | |
604633ae | 125 | S_SET_VALUE (symbolP, valu); |
dacf29ea | 126 | symbol_clear_list_pointers (symbolP); |
6efd877d KR |
127 | |
128 | symbolP->sy_frag = frag; | |
2b68b820 | 129 | #ifndef BFD_ASSEMBLER |
6efd877d | 130 | symbolP->sy_number = ~0; |
0cafaab1 | 131 | symbolP->sy_name_offset = (unsigned int) ~0; |
2b68b820 | 132 | #endif |
6efd877d | 133 | |
6efd877d KR |
134 | obj_symbol_new_hook (symbolP); |
135 | ||
dacf29ea KR |
136 | #ifdef tc_symbol_new_hook |
137 | tc_symbol_new_hook (symbolP); | |
138 | #endif | |
fecd2382 | 139 | |
2b68b820 KR |
140 | return symbolP; |
141 | } | |
fecd2382 | 142 | \f |
6efd877d | 143 | |
fecd2382 RP |
144 | /* |
145 | * colon() | |
146 | * | |
147 | * We have just seen "<name>:". | |
148 | * Creates a struct symbol unless it already exists. | |
149 | * | |
150 | * Gripes if we are redefining a symbol incompatibly (and ignores it). | |
151 | * | |
152 | */ | |
6efd877d KR |
153 | void |
154 | colon (sym_name) /* just seen "x:" - rattle symbols & frags */ | |
155 | register char *sym_name; /* symbol name, as a cannonical string */ | |
156 | /* We copy this string: OK to alter later. */ | |
fecd2382 | 157 | { |
6efd877d KR |
158 | register symbolS *symbolP; /* symbol we are working with */ |
159 | ||
fecd2382 | 160 | #ifdef LOCAL_LABELS_DOLLAR |
2b68b820 KR |
161 | /* Sun local labels go out of scope whenever a non-local symbol is |
162 | defined. */ | |
6efd877d KR |
163 | |
164 | if (*sym_name != 'L') | |
165 | dollar_label_clear (); | |
166 | #endif /* LOCAL_LABELS_DOLLAR */ | |
167 | ||
fecd2382 | 168 | #ifndef WORKING_DOT_WORD |
6efd877d KR |
169 | if (new_broken_words) |
170 | { | |
171 | struct broken_word *a; | |
172 | int possible_bytes; | |
173 | fragS *frag_tmp; | |
174 | char *frag_opcode; | |
175 | ||
2b68b820 KR |
176 | extern const int md_short_jump_size; |
177 | extern const int md_long_jump_size; | |
178 | possible_bytes = (md_short_jump_size | |
179 | + new_broken_words * md_long_jump_size); | |
6efd877d KR |
180 | |
181 | frag_tmp = frag_now; | |
182 | frag_opcode = frag_var (rs_broken_word, | |
183 | possible_bytes, | |
184 | possible_bytes, | |
185 | (relax_substateT) 0, | |
186 | (symbolS *) broken_words, | |
187 | 0L, | |
188 | NULL); | |
189 | ||
190 | /* We want to store the pointer to where to insert the jump table in the | |
2b68b820 KR |
191 | fr_opcode of the rs_broken_word frag. This requires a little |
192 | hackery. */ | |
193 | while (frag_tmp | |
194 | && (frag_tmp->fr_type != rs_broken_word | |
195 | || frag_tmp->fr_opcode)) | |
6efd877d KR |
196 | frag_tmp = frag_tmp->fr_next; |
197 | know (frag_tmp); | |
198 | frag_tmp->fr_opcode = frag_opcode; | |
199 | new_broken_words = 0; | |
200 | ||
201 | for (a = broken_words; a && a->dispfrag == 0; a = a->next_broken_word) | |
202 | a->dispfrag = frag_tmp; | |
203 | } | |
204 | #endif /* WORKING_DOT_WORD */ | |
205 | ||
206 | if ((symbolP = symbol_find (sym_name)) != 0) | |
207 | { | |
2b68b820 KR |
208 | #ifdef RESOLVE_SYMBOL_REDEFINITION |
209 | if (RESOLVE_SYMBOL_REDEFINITION (symbolP)) | |
6efd877d | 210 | return; |
2b68b820 | 211 | #endif |
6efd877d | 212 | /* |
2b68b820 KR |
213 | * Now check for undefined symbols |
214 | */ | |
6efd877d KR |
215 | if (!S_IS_DEFINED (symbolP)) |
216 | { | |
217 | if (S_GET_VALUE (symbolP) == 0) | |
218 | { | |
219 | symbolP->sy_frag = frag_now; | |
2b68b820 KR |
220 | #ifdef OBJ_VMS |
221 | S_GET_OTHER(symbolP) = const_flag; | |
fecd2382 | 222 | #endif |
2b68b820 | 223 | S_SET_VALUE (symbolP, (valueT) ((char*)obstack_next_free (&frags) - frag_now->fr_literal)); |
6efd877d | 224 | S_SET_SEGMENT (symbolP, now_seg); |
fecd2382 | 225 | #ifdef N_UNDF |
6efd877d | 226 | know (N_UNDF == 0); |
fecd2382 | 227 | #endif /* if we have one, it better be zero. */ |
6efd877d KR |
228 | |
229 | } | |
230 | else | |
231 | { | |
232 | /* | |
2b68b820 KR |
233 | * There are still several cases to check: |
234 | * A .comm/.lcomm symbol being redefined as | |
235 | * initialized data is OK | |
236 | * A .comm/.lcomm symbol being redefined with | |
237 | * a larger size is also OK | |
238 | * | |
239 | * This only used to be allowed on VMS gas, but Sun cc | |
240 | * on the sparc also depends on it. | |
241 | */ | |
242 | ||
243 | if (((!S_IS_DEBUG (symbolP) | |
244 | && !S_IS_DEFINED (symbolP) | |
245 | && S_IS_EXTERNAL (symbolP)) | |
246 | || S_GET_SEGMENT (symbolP) == bss_section) | |
247 | && (now_seg == data_section | |
248 | || now_seg == S_GET_SEGMENT (symbolP))) | |
6efd877d KR |
249 | { |
250 | /* | |
2b68b820 KR |
251 | * Select which of the 2 cases this is |
252 | */ | |
253 | if (now_seg != data_section) | |
6efd877d KR |
254 | { |
255 | /* | |
2b68b820 KR |
256 | * New .comm for prev .comm symbol. |
257 | * If the new size is larger we just | |
258 | * change its value. If the new size | |
259 | * is smaller, we ignore this symbol | |
260 | */ | |
6efd877d | 261 | if (S_GET_VALUE (symbolP) |
2b68b820 | 262 | < ((unsigned) frag_now_fix ())) |
6efd877d | 263 | { |
2b68b820 | 264 | S_SET_VALUE (symbolP, (valueT) frag_now_fix ()); |
6efd877d KR |
265 | } |
266 | } | |
267 | else | |
268 | { | |
85825401 ILT |
269 | /* It is a .comm/.lcomm being converted to initialized |
270 | data. */ | |
6efd877d | 271 | symbolP->sy_frag = frag_now; |
2b68b820 KR |
272 | #ifdef OBJ_VMS |
273 | S_GET_OTHER(symbolP) = const_flag; | |
274 | #endif /* OBJ_VMS */ | |
275 | S_SET_VALUE (symbolP, (valueT) frag_now_fix ()); | |
6efd877d KR |
276 | S_SET_SEGMENT (symbolP, now_seg); /* keep N_EXT bit */ |
277 | } | |
278 | } | |
279 | else | |
280 | { | |
2b68b820 KR |
281 | #if defined (S_GET_OTHER) && defined (S_GET_DESC) |
282 | as_fatal ("Symbol \"%s\" is already defined as \"%s\"/%d.%d.%ld.", | |
6efd877d KR |
283 | sym_name, |
284 | segment_name (S_GET_SEGMENT (symbolP)), | |
2b68b820 KR |
285 | S_GET_OTHER (symbolP), S_GET_DESC (symbolP), |
286 | (long) S_GET_VALUE (symbolP)); | |
287 | #else | |
58d4951d | 288 | as_fatal ("Symbol \"%s\" is already defined as \"%s\"/%ld.", |
6efd877d KR |
289 | sym_name, |
290 | segment_name (S_GET_SEGMENT (symbolP)), | |
58d4951d | 291 | (long) S_GET_VALUE (symbolP)); |
2b68b820 | 292 | #endif |
6efd877d KR |
293 | } |
294 | } /* if the undefined symbol has no value */ | |
295 | } | |
296 | else | |
297 | { | |
298 | /* Don't blow up if the definition is the same */ | |
299 | if (!(frag_now == symbolP->sy_frag | |
2b68b820 | 300 | && S_GET_VALUE (symbolP) == (char*)obstack_next_free (&frags) - frag_now->fr_literal |
6efd877d KR |
301 | && S_GET_SEGMENT (symbolP) == now_seg)) |
302 | as_fatal ("Symbol %s already defined.", sym_name); | |
303 | } /* if this symbol is not yet defined */ | |
304 | ||
305 | } | |
306 | else | |
307 | { | |
308 | symbolP = symbol_new (sym_name, | |
309 | now_seg, | |
2b68b820 | 310 | (valueT) ((char*)obstack_next_free (&frags) - frag_now->fr_literal), |
6efd877d | 311 | frag_now); |
2b68b820 | 312 | #ifdef OBJ_VMS |
6efd877d | 313 | S_SET_OTHER (symbolP, const_flag); |
2b68b820 | 314 | #endif /* OBJ_VMS */ |
fecd2382 | 315 | |
6efd877d KR |
316 | symbol_table_insert (symbolP); |
317 | } /* if we have seen this symbol before */ | |
1e9cf565 ILT |
318 | |
319 | #ifdef tc_frob_label | |
320 | tc_frob_label (symbolP); | |
2b68b820 | 321 | #endif |
1ecd6c4a | 322 | } |
fecd2382 | 323 | \f |
6efd877d | 324 | |
fecd2382 RP |
325 | /* |
326 | * symbol_table_insert() | |
327 | * | |
328 | * Die if we can't insert the symbol. | |
329 | * | |
330 | */ | |
331 | ||
6efd877d KR |
332 | void |
333 | symbol_table_insert (symbolP) | |
334 | symbolS *symbolP; | |
fecd2382 | 335 | { |
604633ae | 336 | register const char *error_string; |
6efd877d KR |
337 | |
338 | know (symbolP); | |
339 | know (S_GET_NAME (symbolP)); | |
340 | ||
0cafaab1 | 341 | if ((error_string = hash_jam (sy_hash, S_GET_NAME (symbolP), (PTR) symbolP))) |
6efd877d KR |
342 | { |
343 | as_fatal ("Inserting \"%s\" into symbol table failed: %s", | |
344 | S_GET_NAME (symbolP), error_string); | |
345 | } /* on error */ | |
346 | } /* symbol_table_insert() */ | |
fecd2382 RP |
347 | \f |
348 | /* | |
349 | * symbol_find_or_make() | |
350 | * | |
351 | * If a symbol name does not exist, create it as undefined, and insert | |
352 | * it into the symbol table. Return a pointer to it. | |
353 | */ | |
6efd877d KR |
354 | symbolS * |
355 | symbol_find_or_make (name) | |
356 | char *name; | |
fecd2382 | 357 | { |
6efd877d KR |
358 | register symbolS *symbolP; |
359 | ||
360 | symbolP = symbol_find (name); | |
361 | ||
362 | if (symbolP == NULL) | |
363 | { | |
364 | symbolP = symbol_make (name); | |
365 | ||
366 | symbol_table_insert (symbolP); | |
367 | } /* if symbol wasn't found */ | |
368 | ||
369 | return (symbolP); | |
370 | } /* symbol_find_or_make() */ | |
371 | ||
372 | symbolS * | |
373 | symbol_make (name) | |
2b68b820 | 374 | CONST char *name; |
fecd2382 | 375 | { |
6efd877d KR |
376 | symbolS *symbolP; |
377 | ||
378 | /* Let the machine description default it, e.g. for register names. */ | |
2b68b820 | 379 | symbolP = md_undefined_symbol ((char *) name); |
6efd877d KR |
380 | |
381 | if (!symbolP) | |
2b68b820 | 382 | symbolP = symbol_new (name, undefined_section, (valueT) 0, &zero_address_frag); |
6efd877d KR |
383 | |
384 | return (symbolP); | |
385 | } /* symbol_make() */ | |
fecd2382 RP |
386 | |
387 | /* | |
388 | * symbol_find() | |
6efd877d | 389 | * |
fecd2382 RP |
390 | * Implement symbol table lookup. |
391 | * In: A symbol's name as a string: '\0' can't be part of a symbol name. | |
392 | * Out: NULL if the name was not in the symbol table, else the address | |
393 | * of a struct symbol associated with that name. | |
394 | */ | |
395 | ||
6efd877d KR |
396 | symbolS * |
397 | symbol_find (name) | |
2b68b820 | 398 | CONST char *name; |
fecd2382 | 399 | { |
a6c6eaf8 | 400 | #ifdef STRIP_UNDERSCORE |
6efd877d | 401 | return (symbol_find_base (name, 1)); |
a6c6eaf8 | 402 | #else /* STRIP_UNDERSCORE */ |
6efd877d | 403 | return (symbol_find_base (name, 0)); |
fecd2382 | 404 | #endif /* STRIP_UNDERSCORE */ |
6efd877d | 405 | } /* symbol_find() */ |
fecd2382 | 406 | |
6efd877d KR |
407 | symbolS * |
408 | symbol_find_base (name, strip_underscore) | |
2b68b820 | 409 | CONST char *name; |
6efd877d | 410 | int strip_underscore; |
fecd2382 | 411 | { |
6efd877d KR |
412 | if (strip_underscore && *name == '_') |
413 | name++; | |
dacf29ea KR |
414 | |
415 | #ifdef tc_canonicalize_symbol_name | |
416 | { | |
417 | char *copy; | |
418 | ||
419 | copy = (char *) alloca (strlen (name) + 1); | |
420 | strcpy (copy, name); | |
421 | name = tc_canonicalize_symbol_name (copy); | |
422 | } | |
423 | #endif | |
424 | ||
6efd877d | 425 | return ((symbolS *) hash_find (sy_hash, name)); |
fecd2382 RP |
426 | } |
427 | ||
428 | /* | |
429 | * Once upon a time, symbols were kept in a singly linked list. At | |
430 | * least coff needs to be able to rearrange them from time to time, for | |
431 | * which a doubly linked list is much more convenient. Loic did these | |
432 | * as macros which seemed dangerous to me so they're now functions. | |
433 | * xoxorich. | |
434 | */ | |
435 | ||
436 | /* Link symbol ADDME after symbol TARGET in the chain. */ | |
6efd877d KR |
437 | void |
438 | symbol_append (addme, target, rootPP, lastPP) | |
439 | symbolS *addme; | |
440 | symbolS *target; | |
441 | symbolS **rootPP; | |
442 | symbolS **lastPP; | |
fecd2382 | 443 | { |
6efd877d KR |
444 | if (target == NULL) |
445 | { | |
446 | know (*rootPP == NULL); | |
447 | know (*lastPP == NULL); | |
448 | *rootPP = addme; | |
449 | *lastPP = addme; | |
450 | return; | |
451 | } /* if the list is empty */ | |
452 | ||
453 | if (target->sy_next != NULL) | |
454 | { | |
fecd2382 | 455 | #ifdef SYMBOLS_NEED_BACKPOINTERS |
6efd877d | 456 | target->sy_next->sy_previous = addme; |
fecd2382 | 457 | #endif /* SYMBOLS_NEED_BACKPOINTERS */ |
6efd877d KR |
458 | } |
459 | else | |
460 | { | |
461 | know (*lastPP == target); | |
462 | *lastPP = addme; | |
463 | } /* if we have a next */ | |
464 | ||
465 | addme->sy_next = target->sy_next; | |
466 | target->sy_next = addme; | |
467 | ||
fecd2382 | 468 | #ifdef SYMBOLS_NEED_BACKPOINTERS |
6efd877d | 469 | addme->sy_previous = target; |
fecd2382 | 470 | #endif /* SYMBOLS_NEED_BACKPOINTERS */ |
2b68b820 | 471 | } |
fecd2382 | 472 | |
dacf29ea KR |
473 | /* Set the chain pointers of SYMBOL to null. */ |
474 | void | |
475 | symbol_clear_list_pointers (symbolP) | |
476 | symbolS *symbolP; | |
477 | { | |
478 | symbolP->sy_next = NULL; | |
479 | #ifdef SYMBOLS_NEED_BACKPOINTERS | |
480 | symbolP->sy_previous = NULL; | |
481 | #endif | |
482 | } | |
483 | ||
fecd2382 RP |
484 | #ifdef SYMBOLS_NEED_BACKPOINTERS |
485 | /* Remove SYMBOLP from the list. */ | |
6efd877d KR |
486 | void |
487 | symbol_remove (symbolP, rootPP, lastPP) | |
488 | symbolS *symbolP; | |
489 | symbolS **rootPP; | |
490 | symbolS **lastPP; | |
fecd2382 | 491 | { |
6efd877d KR |
492 | if (symbolP == *rootPP) |
493 | { | |
494 | *rootPP = symbolP->sy_next; | |
495 | } /* if it was the root */ | |
496 | ||
497 | if (symbolP == *lastPP) | |
498 | { | |
499 | *lastPP = symbolP->sy_previous; | |
500 | } /* if it was the tail */ | |
501 | ||
502 | if (symbolP->sy_next != NULL) | |
503 | { | |
504 | symbolP->sy_next->sy_previous = symbolP->sy_previous; | |
505 | } /* if not last */ | |
506 | ||
507 | if (symbolP->sy_previous != NULL) | |
508 | { | |
509 | symbolP->sy_previous->sy_next = symbolP->sy_next; | |
510 | } /* if not first */ | |
511 | ||
dacf29ea | 512 | debug_verify_symchain (*rootPP, *lastPP); |
2b68b820 | 513 | } |
fecd2382 RP |
514 | |
515 | /* Link symbol ADDME before symbol TARGET in the chain. */ | |
6efd877d KR |
516 | void |
517 | symbol_insert (addme, target, rootPP, lastPP) | |
518 | symbolS *addme; | |
519 | symbolS *target; | |
520 | symbolS **rootPP; | |
521 | symbolS **lastPP; | |
fecd2382 | 522 | { |
6efd877d KR |
523 | if (target->sy_previous != NULL) |
524 | { | |
525 | target->sy_previous->sy_next = addme; | |
526 | } | |
527 | else | |
528 | { | |
529 | know (*rootPP == target); | |
530 | *rootPP = addme; | |
531 | } /* if not first */ | |
532 | ||
533 | addme->sy_previous = target->sy_previous; | |
534 | target->sy_previous = addme; | |
535 | addme->sy_next = target; | |
536 | ||
dacf29ea | 537 | debug_verify_symchain (*rootPP, *lastPP); |
2b68b820 | 538 | } |
6efd877d | 539 | |
fecd2382 RP |
540 | #endif /* SYMBOLS_NEED_BACKPOINTERS */ |
541 | ||
6efd877d KR |
542 | void |
543 | verify_symbol_chain (rootP, lastP) | |
544 | symbolS *rootP; | |
545 | symbolS *lastP; | |
fecd2382 | 546 | { |
6efd877d KR |
547 | symbolS *symbolP = rootP; |
548 | ||
549 | if (symbolP == NULL) | |
2b68b820 | 550 | return; |
6efd877d KR |
551 | |
552 | for (; symbol_next (symbolP) != NULL; symbolP = symbol_next (symbolP)) | |
553 | { | |
fecd2382 | 554 | #ifdef SYMBOLS_NEED_BACKPOINTERS |
6efd877d | 555 | know (symbolP->sy_next->sy_previous == symbolP); |
2b68b820 KR |
556 | #else |
557 | /* Walk the list anyways, to make sure pointers are still good. */ | |
604633ae | 558 | ; |
fecd2382 | 559 | #endif /* SYMBOLS_NEED_BACKPOINTERS */ |
2b68b820 | 560 | } |
6efd877d | 561 | |
2b68b820 KR |
562 | assert (lastP == symbolP); |
563 | } | |
6efd877d | 564 | |
2b68b820 KR |
565 | void |
566 | verify_symbol_chain_2 (sym) | |
567 | symbolS *sym; | |
568 | { | |
569 | symbolS *p = sym, *n = sym; | |
570 | #ifdef SYMBOLS_NEED_BACKPOINTERS | |
571 | while (symbol_previous (p)) | |
572 | p = symbol_previous (p); | |
573 | #endif | |
574 | while (symbol_next (n)) | |
575 | n = symbol_next (n); | |
576 | verify_symbol_chain (p, n); | |
577 | } | |
6efd877d | 578 | |
5868b1fe ILT |
579 | /* Resolve the value of a symbol. This is called during the final |
580 | pass over the symbol table to resolve any symbols with complex | |
581 | values. */ | |
582 | ||
583 | void | |
584 | resolve_symbol_value (symp) | |
585 | symbolS *symp; | |
586 | { | |
0cafaab1 ILT |
587 | int resolved; |
588 | ||
5868b1fe ILT |
589 | if (symp->sy_resolved) |
590 | return; | |
591 | ||
0cafaab1 ILT |
592 | resolved = 0; |
593 | ||
5868b1fe ILT |
594 | if (symp->sy_resolving) |
595 | { | |
596 | as_bad ("Symbol definition loop encountered at %s", | |
597 | S_GET_NAME (symp)); | |
598 | S_SET_VALUE (symp, (valueT) 0); | |
0cafaab1 | 599 | resolved = 1; |
5868b1fe ILT |
600 | } |
601 | else | |
602 | { | |
5ac34ac3 ILT |
603 | offsetT left, right, val; |
604 | segT seg_left, seg_right; | |
605 | ||
5868b1fe ILT |
606 | symp->sy_resolving = 1; |
607 | ||
e702f6e6 | 608 | reduce: |
5ac34ac3 | 609 | switch (symp->sy_value.X_op) |
5868b1fe | 610 | { |
5ac34ac3 ILT |
611 | case O_absent: |
612 | S_SET_VALUE (symp, 0); | |
613 | /* Fall through. */ | |
614 | case O_constant: | |
615 | S_SET_VALUE (symp, S_GET_VALUE (symp) + symp->sy_frag->fr_address); | |
616 | if (S_GET_SEGMENT (symp) == expr_section) | |
617 | S_SET_SEGMENT (symp, absolute_section); | |
0cafaab1 | 618 | resolved = 1; |
5ac34ac3 ILT |
619 | break; |
620 | ||
621 | case O_symbol: | |
5868b1fe ILT |
622 | resolve_symbol_value (symp->sy_value.X_add_symbol); |
623 | ||
e702f6e6 KR |
624 | if (S_GET_SEGMENT (symp->sy_value.X_add_symbol) != undefined_section |
625 | && S_GET_SEGMENT (symp->sy_value.X_add_symbol) != expr_section) | |
626 | { | |
627 | if (symp->sy_value.X_add_number == 0) | |
628 | copy_symbol_attributes (symp, symp->sy_value.X_add_symbol); | |
629 | ||
630 | S_SET_VALUE (symp, | |
631 | (symp->sy_value.X_add_number | |
632 | + symp->sy_frag->fr_address | |
633 | + S_GET_VALUE (symp->sy_value.X_add_symbol))); | |
634 | if (S_GET_SEGMENT (symp) == expr_section | |
635 | || S_GET_SEGMENT (symp) == undefined_section) | |
636 | S_SET_SEGMENT (symp, | |
637 | S_GET_SEGMENT (symp->sy_value.X_add_symbol)); | |
638 | } | |
0cafaab1 | 639 | resolved = symp->sy_value.X_add_symbol->sy_resolved; |
5ac34ac3 ILT |
640 | break; |
641 | ||
642 | case O_uminus: | |
643 | case O_bit_not: | |
644 | resolve_symbol_value (symp->sy_value.X_add_symbol); | |
645 | if (symp->sy_value.X_op == O_uminus) | |
646 | val = - S_GET_VALUE (symp->sy_value.X_add_symbol); | |
647 | else | |
648 | val = ~ S_GET_VALUE (symp->sy_value.X_add_symbol); | |
649 | S_SET_VALUE (symp, | |
650 | (val | |
651 | + symp->sy_value.X_add_number | |
652 | + symp->sy_frag->fr_address)); | |
653 | if (S_GET_SEGMENT (symp) == expr_section | |
654 | || S_GET_SEGMENT (symp) == undefined_section) | |
655 | S_SET_SEGMENT (symp, absolute_section); | |
0cafaab1 | 656 | resolved = symp->sy_value.X_add_symbol->sy_resolved; |
5ac34ac3 ILT |
657 | break; |
658 | ||
e702f6e6 | 659 | case O_add: |
e702f6e6 KR |
660 | resolve_symbol_value (symp->sy_value.X_add_symbol); |
661 | resolve_symbol_value (symp->sy_value.X_op_symbol); | |
662 | seg_left = S_GET_SEGMENT (symp->sy_value.X_add_symbol); | |
663 | seg_right = S_GET_SEGMENT (symp->sy_value.X_op_symbol); | |
664 | /* This case comes up with PIC support. */ | |
665 | { | |
666 | symbolS *s_left = symp->sy_value.X_add_symbol; | |
667 | symbolS *s_right = symp->sy_value.X_op_symbol; | |
668 | ||
669 | if (seg_left == absolute_section) | |
670 | { | |
671 | symbolS *t; | |
672 | segT ts; | |
673 | t = s_left; | |
674 | s_left = s_right; | |
675 | s_right = t; | |
676 | ts = seg_left; | |
677 | seg_left = seg_right; | |
678 | seg_right = ts; | |
679 | } | |
680 | if (seg_right == absolute_section | |
681 | && s_right->sy_resolved) | |
682 | { | |
683 | symp->sy_value.X_add_number += S_GET_VALUE (s_right); | |
684 | symp->sy_value.X_op_symbol = 0; | |
685 | symp->sy_value.X_add_symbol = s_left; | |
686 | symp->sy_value.X_op = O_symbol; | |
687 | goto reduce; | |
688 | } | |
689 | } | |
e702f6e6 KR |
690 | /* fall through */ |
691 | ||
5ac34ac3 ILT |
692 | case O_multiply: |
693 | case O_divide: | |
694 | case O_modulus: | |
695 | case O_left_shift: | |
696 | case O_right_shift: | |
697 | case O_bit_inclusive_or: | |
698 | case O_bit_or_not: | |
699 | case O_bit_exclusive_or: | |
700 | case O_bit_and: | |
5ac34ac3 | 701 | case O_subtract: |
c978e704 | 702 | resolve_symbol_value (symp->sy_value.X_add_symbol); |
5ac34ac3 ILT |
703 | resolve_symbol_value (symp->sy_value.X_op_symbol); |
704 | seg_left = S_GET_SEGMENT (symp->sy_value.X_add_symbol); | |
705 | seg_right = S_GET_SEGMENT (symp->sy_value.X_op_symbol); | |
706 | if (seg_left != seg_right | |
707 | && seg_left != undefined_section | |
708 | && seg_right != undefined_section) | |
709 | as_bad ("%s is operation on symbols in different sections", | |
c978e704 | 710 | S_GET_NAME (symp)); |
5ac34ac3 ILT |
711 | if ((S_GET_SEGMENT (symp->sy_value.X_add_symbol) |
712 | != absolute_section) | |
713 | && symp->sy_value.X_op != O_subtract) | |
714 | as_bad ("%s is illegal operation on non-absolute symbols", | |
715 | S_GET_NAME (symp)); | |
716 | left = S_GET_VALUE (symp->sy_value.X_add_symbol); | |
717 | right = S_GET_VALUE (symp->sy_value.X_op_symbol); | |
718 | switch (symp->sy_value.X_op) | |
719 | { | |
720 | case O_multiply: val = left * right; break; | |
721 | case O_divide: val = left / right; break; | |
722 | case O_modulus: val = left % right; break; | |
723 | case O_left_shift: val = left << right; break; | |
724 | case O_right_shift: val = left >> right; break; | |
725 | case O_bit_inclusive_or: val = left | right; break; | |
726 | case O_bit_or_not: val = left |~ right; break; | |
727 | case O_bit_exclusive_or: val = left ^ right; break; | |
728 | case O_bit_and: val = left & right; break; | |
729 | case O_add: val = left + right; break; | |
730 | case O_subtract: val = left - right; break; | |
731 | default: abort (); | |
732 | } | |
c978e704 ILT |
733 | S_SET_VALUE (symp, |
734 | (symp->sy_value.X_add_number | |
735 | + symp->sy_frag->fr_address | |
5ac34ac3 ILT |
736 | + val)); |
737 | if (S_GET_SEGMENT (symp) == expr_section | |
738 | || S_GET_SEGMENT (symp) == undefined_section) | |
739 | S_SET_SEGMENT (symp, absolute_section); | |
0cafaab1 ILT |
740 | resolved = (symp->sy_value.X_add_symbol->sy_resolved |
741 | && symp->sy_value.X_op_symbol->sy_resolved); | |
5ac34ac3 ILT |
742 | break; |
743 | ||
744 | case O_register: | |
745 | case O_big: | |
746 | case O_illegal: | |
0cafaab1 ILT |
747 | /* Give an error (below) if not in expr_section. We don't |
748 | want to worry about expr_section symbols, because they | |
749 | are fictional (they are created as part of expression | |
750 | resolution), and any problems may not actually mean | |
751 | anything. */ | |
5ac34ac3 | 752 | break; |
5868b1fe ILT |
753 | } |
754 | } | |
755 | ||
0cafaab1 ILT |
756 | /* Don't worry if we can't resolve an expr_section symbol. */ |
757 | if (resolved) | |
758 | symp->sy_resolved = 1; | |
759 | else if (S_GET_SEGMENT (symp) != expr_section) | |
760 | { | |
761 | as_bad ("can't resolve value for symbol \"%s\"", S_GET_NAME (symp)); | |
762 | symp->sy_resolved = 1; | |
763 | } | |
5868b1fe ILT |
764 | } |
765 | ||
6efd877d KR |
766 | #ifdef LOCAL_LABELS_DOLLAR |
767 | ||
768 | /* Dollar labels look like a number followed by a dollar sign. Eg, "42$". | |
769 | They are *really* local. That is, they go out of scope whenever we see a | |
770 | label that isn't local. Also, like fb labels, there can be multiple | |
771 | instances of a dollar label. Therefor, we name encode each instance with | |
772 | the instance number, keep a list of defined symbols separate from the real | |
773 | symbol table, and we treat these buggers as a sparse array. */ | |
774 | ||
2b68b820 KR |
775 | static long *dollar_labels; |
776 | static long *dollar_label_instances; | |
777 | static char *dollar_label_defines; | |
778 | static long dollar_label_count; | |
604633ae | 779 | static unsigned long dollar_label_max; |
6efd877d KR |
780 | |
781 | int | |
782 | dollar_label_defined (label) | |
783 | long label; | |
784 | { | |
785 | long *i; | |
786 | ||
787 | know ((dollar_labels != NULL) || (dollar_label_count == 0)); | |
788 | ||
789 | for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) | |
2b68b820 KR |
790 | if (*i == label) |
791 | return dollar_label_defines[i - dollar_labels]; | |
6efd877d KR |
792 | |
793 | /* if we get here, label isn't defined */ | |
2b68b820 | 794 | return 0; |
6efd877d KR |
795 | } /* dollar_label_defined() */ |
796 | ||
797 | static int | |
798 | dollar_label_instance (label) | |
799 | long label; | |
800 | { | |
801 | long *i; | |
802 | ||
803 | know ((dollar_labels != NULL) || (dollar_label_count == 0)); | |
804 | ||
805 | for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) | |
2b68b820 KR |
806 | if (*i == label) |
807 | return (dollar_label_instances[i - dollar_labels]); | |
6efd877d | 808 | |
2b68b820 KR |
809 | /* If we get here, we haven't seen the label before, therefore its instance |
810 | count is zero. */ | |
811 | return 0; | |
812 | } | |
6efd877d KR |
813 | |
814 | void | |
815 | dollar_label_clear () | |
816 | { | |
604633ae | 817 | memset (dollar_label_defines, '\0', (unsigned int) dollar_label_count); |
2b68b820 | 818 | } |
6efd877d KR |
819 | |
820 | #define DOLLAR_LABEL_BUMP_BY 10 | |
821 | ||
822 | void | |
823 | define_dollar_label (label) | |
824 | long label; | |
825 | { | |
826 | long *i; | |
827 | ||
828 | for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) | |
2b68b820 KR |
829 | if (*i == label) |
830 | { | |
831 | ++dollar_label_instances[i - dollar_labels]; | |
832 | dollar_label_defines[i - dollar_labels] = 1; | |
833 | return; | |
834 | } | |
6efd877d KR |
835 | |
836 | /* if we get to here, we don't have label listed yet. */ | |
837 | ||
838 | if (dollar_labels == NULL) | |
839 | { | |
840 | dollar_labels = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long)); | |
841 | dollar_label_instances = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long)); | |
842 | dollar_label_defines = xmalloc (DOLLAR_LABEL_BUMP_BY); | |
843 | dollar_label_max = DOLLAR_LABEL_BUMP_BY; | |
844 | dollar_label_count = 0; | |
6efd877d KR |
845 | } |
846 | else if (dollar_label_count == dollar_label_max) | |
847 | { | |
848 | dollar_label_max += DOLLAR_LABEL_BUMP_BY; | |
849 | dollar_labels = (long *) xrealloc ((char *) dollar_labels, | |
850 | dollar_label_max * sizeof (long)); | |
851 | dollar_label_instances = (long *) xrealloc ((char *) dollar_label_instances, | |
852 | dollar_label_max * sizeof (long)); | |
853 | dollar_label_defines = xrealloc (dollar_label_defines, dollar_label_max); | |
854 | } /* if we needed to grow */ | |
855 | ||
856 | dollar_labels[dollar_label_count] = label; | |
857 | dollar_label_instances[dollar_label_count] = 1; | |
858 | dollar_label_defines[dollar_label_count] = 1; | |
859 | ++dollar_label_count; | |
2b68b820 | 860 | } |
6efd877d KR |
861 | |
862 | /* | |
863 | * dollar_label_name() | |
864 | * | |
865 | * Caller must copy returned name: we re-use the area for the next name. | |
866 | * | |
2b68b820 KR |
867 | * The mth occurence of label n: is turned into the symbol "Ln^Am" |
868 | * where n is the label number and m is the instance number. "L" makes | |
869 | * it a label discarded unless debugging and "^A"('\1') ensures no | |
870 | * ordinary symbol SHOULD get the same name as a local label | |
871 | * symbol. The first "4:" is "L4^A1" - the m numbers begin at 1. | |
6efd877d KR |
872 | * |
873 | * fb labels get the same treatment, except that ^B is used in place of ^A. | |
874 | */ | |
875 | ||
876 | char * /* Return local label name. */ | |
877 | dollar_label_name (n, augend) | |
878 | register long n; /* we just saw "n$:" : n a number */ | |
879 | register int augend; /* 0 for current instance, 1 for new instance */ | |
880 | { | |
881 | long i; | |
882 | /* Returned to caller, then copied. used for created names ("4f") */ | |
883 | static char symbol_name_build[24]; | |
884 | register char *p; | |
885 | register char *q; | |
886 | char symbol_name_temporary[20]; /* build up a number, BACKWARDS */ | |
887 | ||
888 | know (n >= 0); | |
889 | know (augend == 0 || augend == 1); | |
890 | p = symbol_name_build; | |
891 | *p++ = 'L'; | |
892 | ||
893 | /* Next code just does sprintf( {}, "%d", n); */ | |
894 | /* label number */ | |
895 | q = symbol_name_temporary; | |
896 | for (*q++ = 0, i = n; i; ++q) | |
897 | { | |
898 | *q = i % 10 + '0'; | |
899 | i /= 10; | |
900 | } | |
901 | while ((*p = *--q) != '\0') | |
902 | ++p; | |
903 | ||
904 | *p++ = 1; /* ^A */ | |
905 | ||
906 | /* instance number */ | |
907 | q = symbol_name_temporary; | |
908 | for (*q++ = 0, i = dollar_label_instance (n) + augend; i; ++q) | |
909 | { | |
910 | *q = i % 10 + '0'; | |
911 | i /= 10; | |
912 | } | |
913 | while ((*p++ = *--q) != '\0');; | |
914 | ||
915 | /* The label, as a '\0' ended string, starts at symbol_name_build. */ | |
2b68b820 KR |
916 | return symbol_name_build; |
917 | } | |
6efd877d KR |
918 | |
919 | #endif /* LOCAL_LABELS_DOLLAR */ | |
920 | ||
921 | #ifdef LOCAL_LABELS_FB | |
922 | ||
923 | /* | |
924 | * Sombody else's idea of local labels. They are made by "n:" where n | |
925 | * is any decimal digit. Refer to them with | |
926 | * "nb" for previous (backward) n: | |
927 | * or "nf" for next (forward) n:. | |
928 | * | |
929 | * We do a little better and let n be any number, not just a single digit, but | |
930 | * since the other guy's assembler only does ten, we treat the first ten | |
931 | * specially. | |
932 | * | |
933 | * Like someone else's assembler, we have one set of local label counters for | |
934 | * entire assembly, not one set per (sub)segment like in most assemblers. This | |
935 | * implies that one can refer to a label in another segment, and indeed some | |
936 | * crufty compilers have done just that. | |
937 | * | |
938 | * Since there could be a LOT of these things, treat them as a sparse array. | |
939 | */ | |
940 | ||
941 | #define FB_LABEL_SPECIAL (10) | |
942 | ||
943 | static long fb_low_counter[FB_LABEL_SPECIAL]; | |
944 | static long *fb_labels; | |
945 | static long *fb_label_instances; | |
eec0de3f KR |
946 | static long fb_label_count; |
947 | static long fb_label_max; | |
6efd877d KR |
948 | |
949 | /* this must be more than FB_LABEL_SPECIAL */ | |
950 | #define FB_LABEL_BUMP_BY (FB_LABEL_SPECIAL + 6) | |
951 | ||
952 | static void | |
953 | fb_label_init () | |
954 | { | |
955 | memset ((void *) fb_low_counter, '\0', sizeof (fb_low_counter)); | |
6efd877d KR |
956 | } /* fb_label_init() */ |
957 | ||
958 | /* add one to the instance number of this fb label */ | |
959 | void | |
960 | fb_label_instance_inc (label) | |
961 | long label; | |
962 | { | |
963 | long *i; | |
964 | ||
965 | if (label < FB_LABEL_SPECIAL) | |
966 | { | |
967 | ++fb_low_counter[label]; | |
968 | return; | |
969 | } | |
970 | ||
e154ecf4 | 971 | if (fb_labels != NULL) |
6efd877d | 972 | { |
e154ecf4 ILT |
973 | for (i = fb_labels + FB_LABEL_SPECIAL; |
974 | i < fb_labels + fb_label_count; ++i) | |
6efd877d | 975 | { |
e154ecf4 ILT |
976 | if (*i == label) |
977 | { | |
978 | ++fb_label_instances[i - fb_labels]; | |
979 | return; | |
980 | } /* if we find it */ | |
981 | } /* for each existing label */ | |
982 | } | |
6efd877d KR |
983 | |
984 | /* if we get to here, we don't have label listed yet. */ | |
985 | ||
986 | if (fb_labels == NULL) | |
987 | { | |
988 | fb_labels = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long)); | |
989 | fb_label_instances = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long)); | |
990 | fb_label_max = FB_LABEL_BUMP_BY; | |
991 | fb_label_count = FB_LABEL_SPECIAL; | |
992 | ||
993 | } | |
994 | else if (fb_label_count == fb_label_max) | |
995 | { | |
996 | fb_label_max += FB_LABEL_BUMP_BY; | |
997 | fb_labels = (long *) xrealloc ((char *) fb_labels, | |
998 | fb_label_max * sizeof (long)); | |
999 | fb_label_instances = (long *) xrealloc ((char *) fb_label_instances, | |
1000 | fb_label_max * sizeof (long)); | |
1001 | } /* if we needed to grow */ | |
1002 | ||
1003 | fb_labels[fb_label_count] = label; | |
1004 | fb_label_instances[fb_label_count] = 1; | |
1005 | ++fb_label_count; | |
1ecd6c4a | 1006 | } |
6efd877d KR |
1007 | |
1008 | static long | |
1009 | fb_label_instance (label) | |
1010 | long label; | |
1011 | { | |
1012 | long *i; | |
1013 | ||
1014 | if (label < FB_LABEL_SPECIAL) | |
1015 | { | |
1016 | return (fb_low_counter[label]); | |
1017 | } | |
1018 | ||
e154ecf4 | 1019 | if (fb_labels != NULL) |
6efd877d | 1020 | { |
e154ecf4 ILT |
1021 | for (i = fb_labels + FB_LABEL_SPECIAL; |
1022 | i < fb_labels + fb_label_count; ++i) | |
6efd877d | 1023 | { |
e154ecf4 ILT |
1024 | if (*i == label) |
1025 | { | |
1026 | return (fb_label_instances[i - fb_labels]); | |
1027 | } /* if we find it */ | |
1028 | } /* for each existing label */ | |
1029 | } | |
6efd877d | 1030 | |
e154ecf4 ILT |
1031 | /* We didn't find the label, so this must be a reference to the |
1032 | first instance. */ | |
1033 | return 0; | |
2b68b820 | 1034 | } |
6efd877d KR |
1035 | |
1036 | /* | |
1037 | * fb_label_name() | |
1038 | * | |
1039 | * Caller must copy returned name: we re-use the area for the next name. | |
1040 | * | |
2b68b820 KR |
1041 | * The mth occurence of label n: is turned into the symbol "Ln^Bm" |
1042 | * where n is the label number and m is the instance number. "L" makes | |
1043 | * it a label discarded unless debugging and "^B"('\2') ensures no | |
1044 | * ordinary symbol SHOULD get the same name as a local label | |
1045 | * symbol. The first "4:" is "L4^B1" - the m numbers begin at 1. | |
6efd877d | 1046 | * |
2b68b820 | 1047 | * dollar labels get the same treatment, except that ^A is used in place of ^B. */ |
6efd877d KR |
1048 | |
1049 | char * /* Return local label name. */ | |
1050 | fb_label_name (n, augend) | |
1051 | long n; /* we just saw "n:", "nf" or "nb" : n a number */ | |
1052 | long augend; /* 0 for nb, 1 for n:, nf */ | |
1053 | { | |
1054 | long i; | |
1055 | /* Returned to caller, then copied. used for created names ("4f") */ | |
1056 | static char symbol_name_build[24]; | |
1057 | register char *p; | |
1058 | register char *q; | |
1059 | char symbol_name_temporary[20]; /* build up a number, BACKWARDS */ | |
1060 | ||
1061 | know (n >= 0); | |
1062 | know (augend == 0 || augend == 1); | |
1063 | p = symbol_name_build; | |
1064 | *p++ = 'L'; | |
1065 | ||
1066 | /* Next code just does sprintf( {}, "%d", n); */ | |
1067 | /* label number */ | |
1068 | q = symbol_name_temporary; | |
1069 | for (*q++ = 0, i = n; i; ++q) | |
1070 | { | |
1071 | *q = i % 10 + '0'; | |
1072 | i /= 10; | |
1073 | } | |
1074 | while ((*p = *--q) != '\0') | |
1075 | ++p; | |
1076 | ||
1077 | *p++ = 2; /* ^B */ | |
1078 | ||
1079 | /* instance number */ | |
1080 | q = symbol_name_temporary; | |
1081 | for (*q++ = 0, i = fb_label_instance (n) + augend; i; ++q) | |
1082 | { | |
1083 | *q = i % 10 + '0'; | |
1084 | i /= 10; | |
1085 | } | |
1086 | while ((*p++ = *--q) != '\0');; | |
1087 | ||
1088 | /* The label, as a '\0' ended string, starts at symbol_name_build. */ | |
1089 | return (symbol_name_build); | |
1090 | } /* fb_label_name() */ | |
1091 | ||
1092 | #endif /* LOCAL_LABELS_FB */ | |
fecd2382 RP |
1093 | |
1094 | ||
a6c6eaf8 | 1095 | /* |
6efd877d KR |
1096 | * decode name that may have been generated by foo_label_name() above. If |
1097 | * the name wasn't generated by foo_label_name(), then return it unaltered. | |
a6c6eaf8 RP |
1098 | * This is used for error messages. |
1099 | */ | |
a39116f1 | 1100 | |
6efd877d KR |
1101 | char * |
1102 | decode_local_label_name (s) | |
1103 | char *s; | |
a6c6eaf8 | 1104 | { |
6efd877d KR |
1105 | char *p; |
1106 | char *symbol_decode; | |
1107 | int label_number; | |
1108 | int instance_number; | |
1109 | char *type; | |
1110 | const char *message_format = "\"%d\" (instance number %d of a %s label)"; | |
1111 | ||
1112 | if (s[0] != 'L') | |
1113 | return (s); | |
1114 | ||
1115 | for (label_number = 0, p = s + 1; isdigit (*p); ++p) | |
1116 | { | |
1117 | label_number = (10 * label_number) + *p - '0'; | |
1118 | } | |
1119 | ||
1120 | if (*p == 1) | |
1121 | { | |
1122 | type = "dollar"; | |
1123 | } | |
1124 | else if (*p == 2) | |
1125 | { | |
1126 | type = "fb"; | |
1127 | } | |
1128 | else | |
1129 | { | |
1130 | return (s); | |
1131 | } | |
1132 | ||
1133 | for (instance_number = 0, p = s + 1; isdigit (*p); ++p) | |
1134 | { | |
1135 | instance_number = (10 * instance_number) + *p - '0'; | |
1136 | } | |
1137 | ||
1138 | symbol_decode = obstack_alloc (¬es, strlen (message_format) + 30); | |
1139 | (void) sprintf (symbol_decode, message_format, label_number, | |
1140 | instance_number, type); | |
1141 | ||
1142 | return (symbol_decode); | |
1143 | } /* decode_local_label_name() */ | |
a6c6eaf8 | 1144 | |
85051959 ILT |
1145 | /* Get the value of a symbol. */ |
1146 | ||
1147 | valueT | |
1148 | S_GET_VALUE (s) | |
1149 | symbolS *s; | |
1150 | { | |
e702f6e6 KR |
1151 | if (!s->sy_resolved && !s->sy_resolving && s->sy_value.X_op != O_constant) |
1152 | resolve_symbol_value (s); | |
5ac34ac3 | 1153 | if (s->sy_value.X_op != O_constant) |
5868b1fe | 1154 | as_bad ("Attempt to get value of unresolved symbol %s", S_GET_NAME (s)); |
85051959 ILT |
1155 | return (valueT) s->sy_value.X_add_number; |
1156 | } | |
1157 | ||
1158 | /* Set the value of a symbol. */ | |
1159 | ||
1160 | void | |
1161 | S_SET_VALUE (s, val) | |
1162 | symbolS *s; | |
1163 | valueT val; | |
1164 | { | |
5ac34ac3 | 1165 | s->sy_value.X_op = O_constant; |
85051959 | 1166 | s->sy_value.X_add_number = (offsetT) val; |
0cafaab1 | 1167 | s->sy_value.X_unsigned = 0; |
85051959 ILT |
1168 | } |
1169 | ||
e702f6e6 KR |
1170 | void |
1171 | copy_symbol_attributes (dest, src) | |
1172 | symbolS *dest, *src; | |
1173 | { | |
1174 | #ifdef BFD_ASSEMBLER | |
1175 | /* In an expression, transfer the settings of these flags. | |
1176 | The user can override later, of course. */ | |
1177 | #define COPIED_SYMFLAGS (BSF_FUNCTION) | |
1178 | dest->bsym->flags |= src->bsym->flags & COPIED_SYMFLAGS; | |
1179 | #endif | |
1180 | ||
1181 | #ifdef OBJ_COPY_SYMBOL_ATTRIBUTES | |
1182 | OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src); | |
1183 | #endif | |
1184 | } | |
1185 | ||
2b68b820 KR |
1186 | #ifdef BFD_ASSEMBLER |
1187 | ||
1188 | int | |
1189 | S_IS_EXTERNAL (s) | |
1190 | symbolS *s; | |
1191 | { | |
1192 | flagword flags = s->bsym->flags; | |
1193 | ||
1194 | /* sanity check */ | |
0cafaab1 | 1195 | if (flags & BSF_LOCAL && flags & BSF_GLOBAL) |
2b68b820 KR |
1196 | abort (); |
1197 | ||
0cafaab1 | 1198 | return (flags & BSF_GLOBAL) != 0; |
2b68b820 KR |
1199 | } |
1200 | ||
1201 | int | |
1202 | S_IS_COMMON (s) | |
1203 | symbolS *s; | |
1204 | { | |
0cafaab1 | 1205 | return bfd_is_com_section (s->bsym->section); |
2b68b820 KR |
1206 | } |
1207 | ||
1208 | int | |
1209 | S_IS_DEFINED (s) | |
1210 | symbolS *s; | |
1211 | { | |
1212 | return s->bsym->section != undefined_section; | |
1213 | } | |
1214 | ||
1215 | int | |
1216 | S_IS_DEBUG (s) | |
1217 | symbolS *s; | |
1218 | { | |
1219 | if (s->bsym->flags & BSF_DEBUGGING) | |
1220 | return 1; | |
1221 | return 0; | |
1222 | } | |
1223 | ||
1224 | int | |
1225 | S_IS_LOCAL (s) | |
1226 | symbolS *s; | |
1227 | { | |
1228 | flagword flags = s->bsym->flags; | |
1229 | ||
1230 | /* sanity check */ | |
0cafaab1 | 1231 | if (flags & BSF_LOCAL && flags & BSF_GLOBAL) |
2b68b820 KR |
1232 | abort (); |
1233 | ||
1234 | return (S_GET_NAME (s) | |
1235 | && ! S_IS_DEBUG (s) | |
1236 | && (strchr (S_GET_NAME (s), '\001') | |
1237 | || strchr (S_GET_NAME (s), '\002') | |
1238 | || (S_LOCAL_NAME (s) | |
dacf29ea | 1239 | && !flag_keep_locals))); |
2b68b820 KR |
1240 | } |
1241 | ||
1242 | int | |
1243 | S_IS_EXTERN (s) | |
1244 | symbolS *s; | |
1245 | { | |
1246 | return S_IS_EXTERNAL (s); | |
1247 | } | |
1248 | ||
1249 | int | |
1250 | S_IS_STABD (s) | |
1251 | symbolS *s; | |
1252 | { | |
1253 | return S_GET_NAME (s) == 0; | |
1254 | } | |
1255 | ||
2b68b820 KR |
1256 | CONST char * |
1257 | S_GET_NAME (s) | |
1258 | symbolS *s; | |
1259 | { | |
1260 | return s->bsym->name; | |
1261 | } | |
1262 | ||
1263 | segT | |
1264 | S_GET_SEGMENT (s) | |
1265 | symbolS *s; | |
1266 | { | |
1267 | return s->bsym->section; | |
1268 | } | |
1269 | ||
2b68b820 KR |
1270 | void |
1271 | S_SET_SEGMENT (s, seg) | |
1272 | symbolS *s; | |
1273 | segT seg; | |
1274 | { | |
1275 | s->bsym->section = seg; | |
1276 | } | |
1277 | ||
1278 | void | |
1279 | S_SET_EXTERNAL (s) | |
1280 | symbolS *s; | |
1281 | { | |
1ecd6c4a KR |
1282 | s->bsym->flags |= BSF_GLOBAL; |
1283 | s->bsym->flags &= ~(BSF_LOCAL|BSF_WEAK); | |
2b68b820 KR |
1284 | } |
1285 | ||
1286 | void | |
1287 | S_CLEAR_EXTERNAL (s) | |
1288 | symbolS *s; | |
1289 | { | |
1290 | s->bsym->flags |= BSF_LOCAL; | |
1ecd6c4a KR |
1291 | s->bsym->flags &= ~(BSF_GLOBAL|BSF_WEAK); |
1292 | } | |
1293 | ||
1294 | void | |
1295 | S_SET_WEAK (s) | |
1296 | symbolS *s; | |
1297 | { | |
1298 | s->bsym->flags |= BSF_WEAK; | |
1299 | s->bsym->flags &= ~(BSF_GLOBAL|BSF_LOCAL); | |
2b68b820 KR |
1300 | } |
1301 | ||
1302 | void | |
1303 | S_SET_NAME (s, name) | |
1304 | symbolS *s; | |
1305 | char *name; | |
1306 | { | |
1307 | s->bsym->name = name; | |
1308 | } | |
1309 | #endif /* BFD_ASSEMBLER */ | |
1310 | ||
eec0de3f KR |
1311 | void |
1312 | symbol_begin () | |
1313 | { | |
1314 | symbol_lastP = NULL; | |
1315 | symbol_rootP = NULL; /* In case we have 0 symbols (!!) */ | |
1316 | sy_hash = hash_new (); | |
dacf29ea | 1317 | |
eec0de3f KR |
1318 | memset ((char *) (&abs_symbol), '\0', sizeof (abs_symbol)); |
1319 | #ifdef BFD_ASSEMBLER | |
dacf29ea | 1320 | #if defined (EMIT_SECTION_SYMBOLS) || !defined (RELOC_REQUIRES_SYMBOL) |
eec0de3f | 1321 | abs_symbol.bsym = bfd_abs_section.symbol; |
dacf29ea | 1322 | #endif |
eec0de3f KR |
1323 | #else |
1324 | /* Can't initialise a union. Sigh. */ | |
1325 | S_SET_SEGMENT (&abs_symbol, absolute_section); | |
1326 | #endif | |
dacf29ea KR |
1327 | abs_symbol.sy_value.X_op = O_constant; |
1328 | ||
eec0de3f KR |
1329 | #ifdef LOCAL_LABELS_FB |
1330 | fb_label_init (); | |
1331 | #endif /* LOCAL_LABELS_FB */ | |
1332 | } | |
1333 | ||
e702f6e6 KR |
1334 | \f |
1335 | int indent_level; | |
dacf29ea KR |
1336 | |
1337 | static void | |
1338 | indent () | |
1339 | { | |
1340 | printf ("%*s", indent_level * 4, ""); | |
1341 | } | |
1342 | ||
1343 | void print_expr_1 PARAMS ((FILE *, expressionS *)); | |
1344 | void print_symbol_value_1 PARAMS ((FILE *, symbolS *)); | |
1345 | ||
1346 | void | |
1347 | print_symbol_value_1 (file, sym) | |
1348 | FILE *file; | |
1349 | symbolS *sym; | |
1350 | { | |
1351 | const char *name = S_GET_NAME (sym); | |
1352 | if (!name || !name[0]) | |
1353 | name = "(unnamed)"; | |
e702f6e6 KR |
1354 | fprintf (file, "sym %lx %s", sym, name); |
1355 | if (sym->sy_frag != &zero_address_frag) | |
1356 | fprintf (file, " frag %lx", (long) sym->sy_frag); | |
dacf29ea KR |
1357 | if (sym->written) |
1358 | fprintf (file, " written"); | |
1359 | if (sym->sy_resolved) | |
1360 | fprintf (file, " resolved"); | |
e702f6e6 | 1361 | else if (sym->sy_resolving) |
dacf29ea KR |
1362 | fprintf (file, " resolving"); |
1363 | if (sym->sy_used_in_reloc) | |
1364 | fprintf (file, " used-in-reloc"); | |
1365 | if (sym->sy_used) | |
1366 | fprintf (file, " used"); | |
e702f6e6 | 1367 | fprintf (file, " %s", segment_name (S_GET_SEGMENT (sym))); |
dacf29ea KR |
1368 | if (sym->sy_resolved) |
1369 | { | |
e702f6e6 KR |
1370 | segT s = S_GET_SEGMENT (sym); |
1371 | ||
1372 | if (s != undefined_section | |
1373 | && s != expr_section) | |
1374 | fprintf (file, " %lx", (long) S_GET_VALUE (sym)); | |
dacf29ea | 1375 | } |
e702f6e6 | 1376 | else if (indent_level < 8 && S_GET_SEGMENT (sym) != undefined_section) |
dacf29ea KR |
1377 | { |
1378 | indent_level++; | |
1379 | fprintf (file, "\n%*s<", indent_level * 4, ""); | |
1380 | print_expr_1 (file, &sym->sy_value); | |
1381 | fprintf (file, ">"); | |
1382 | indent_level--; | |
1383 | } | |
1384 | fflush (file); | |
1385 | } | |
1386 | ||
1387 | void | |
1388 | print_symbol_value (sym) | |
1389 | symbolS *sym; | |
1390 | { | |
1391 | indent_level = 0; | |
1392 | print_symbol_value_1 (stderr, sym); | |
1393 | fprintf (stderr, "\n"); | |
1394 | } | |
1395 | ||
1396 | void | |
1397 | print_expr_1 (file, exp) | |
1398 | FILE *file; | |
1399 | expressionS *exp; | |
1400 | { | |
1401 | fprintf (file, "expr %lx ", (long) exp); | |
1402 | switch (exp->X_op) | |
1403 | { | |
1404 | case O_illegal: | |
1405 | fprintf (file, "illegal"); | |
1406 | break; | |
1407 | case O_absent: | |
1408 | fprintf (file, "absent"); | |
1409 | break; | |
1410 | case O_constant: | |
1411 | fprintf (file, "constant %lx", (long) exp->X_add_number); | |
1412 | break; | |
1413 | case O_symbol: | |
1414 | indent_level++; | |
1415 | fprintf (file, "symbol\n%*s<", indent_level * 4, ""); | |
1416 | print_symbol_value_1 (file, exp->X_add_symbol); | |
1417 | fprintf (file, ">"); | |
1418 | maybe_print_addnum: | |
dacf29ea | 1419 | if (exp->X_add_number) |
e702f6e6 | 1420 | fprintf (file, "\n%*s%lx", indent_level * 4, "", |
dacf29ea | 1421 | (long) exp->X_add_number); |
e702f6e6 | 1422 | indent_level--; |
dacf29ea KR |
1423 | break; |
1424 | case O_register: | |
1425 | fprintf (file, "register #%d", (int) exp->X_add_number); | |
1426 | break; | |
1427 | case O_big: | |
1428 | fprintf (file, "big"); | |
1429 | break; | |
1430 | case O_uminus: | |
1431 | fprintf (file, "uminus -<"); | |
1432 | indent_level++; | |
1433 | print_symbol_value_1 (file, exp->X_add_symbol); | |
1434 | fprintf (file, ">"); | |
1435 | goto maybe_print_addnum; | |
1436 | case O_bit_not: | |
1437 | fprintf (file, "bit_not"); | |
1438 | break; | |
1439 | case O_multiply: | |
1440 | fprintf (file, "multiply"); | |
1441 | break; | |
1442 | case O_divide: | |
1443 | fprintf (file, "divide"); | |
1444 | break; | |
1445 | case O_modulus: | |
1446 | fprintf (file, "modulus"); | |
1447 | break; | |
1448 | case O_left_shift: | |
1449 | fprintf (file, "lshift"); | |
1450 | break; | |
1451 | case O_right_shift: | |
1452 | fprintf (file, "rshift"); | |
1453 | break; | |
1454 | case O_bit_inclusive_or: | |
1455 | fprintf (file, "bit_ior"); | |
1456 | break; | |
1457 | case O_bit_exclusive_or: | |
1458 | fprintf (file, "bit_xor"); | |
1459 | break; | |
1460 | case O_bit_and: | |
1461 | fprintf (file, "bit_and"); | |
1462 | break; | |
1463 | case O_add: | |
1464 | indent_level++; | |
1465 | fprintf (file, "add\n%*s<", indent_level * 4, ""); | |
1466 | print_symbol_value_1 (file, exp->X_add_symbol); | |
1467 | fprintf (file, ">\n%*s<", indent_level * 4, ""); | |
1468 | print_symbol_value_1 (file, exp->X_op_symbol); | |
1469 | fprintf (file, ">"); | |
1470 | goto maybe_print_addnum; | |
1471 | case O_subtract: | |
1472 | indent_level++; | |
1473 | fprintf (file, "subtract\n%*s<", indent_level * 4, ""); | |
1474 | print_symbol_value_1 (file, exp->X_add_symbol); | |
1475 | fprintf (file, ">\n%*s<", indent_level * 4, ""); | |
1476 | print_symbol_value_1 (file, exp->X_op_symbol); | |
1477 | fprintf (file, ">"); | |
1478 | goto maybe_print_addnum; | |
1479 | default: | |
1480 | fprintf (file, "{unknown opcode %d}", (int) exp->X_op); | |
1481 | break; | |
1482 | } | |
1483 | fflush (stdout); | |
1484 | } | |
1485 | ||
1486 | void | |
1487 | print_expr (exp) | |
1488 | expressionS *exp; | |
1489 | { | |
1490 | print_expr_1 (stderr, exp); | |
1491 | fprintf (stderr, "\n"); | |
1492 | } | |
1493 | ||
8b228fe9 | 1494 | /* end of symbols.c */ |