Commit | Line | Data |
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252b5132 | 1 | /* symbols.c -symbol table- |
f7e42eb4 | 2 | Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
a76903bf | 3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005 |
252b5132 RH |
4 | Free Software Foundation, Inc. |
5 | ||
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
252b5132 | 22 | |
7c743825 | 23 | /* #define DEBUG_SYMS / * to debug symbol list maintenance. */ |
252b5132 | 24 | |
252b5132 RH |
25 | #include "as.h" |
26 | ||
3882b010 | 27 | #include "safe-ctype.h" |
252b5132 RH |
28 | #include "obstack.h" /* For "symbols.h" */ |
29 | #include "subsegs.h" | |
30 | ||
49309057 ILT |
31 | #include "struc-symbol.h" |
32 | ||
252b5132 RH |
33 | /* This is non-zero if symbols are case sensitive, which is the |
34 | default. */ | |
35 | int symbols_case_sensitive = 1; | |
36 | ||
37 | #ifndef WORKING_DOT_WORD | |
38 | extern int new_broken_words; | |
39 | #endif | |
40 | ||
41 | /* symbol-name => struct symbol pointer */ | |
42 | static struct hash_control *sy_hash; | |
43 | ||
49309057 ILT |
44 | /* Table of local symbols. */ |
45 | static struct hash_control *local_hash; | |
46 | ||
7c743825 | 47 | /* Below are commented in "symbols.h". */ |
252b5132 RH |
48 | symbolS *symbol_rootP; |
49 | symbolS *symbol_lastP; | |
50 | symbolS abs_symbol; | |
51 | ||
52 | #ifdef DEBUG_SYMS | |
53 | #define debug_verify_symchain verify_symbol_chain | |
54 | #else | |
55 | #define debug_verify_symchain(root, last) ((void) 0) | |
56 | #endif | |
57 | ||
aa257fcd NC |
58 | #define DOLLAR_LABEL_CHAR '\001' |
59 | #define LOCAL_LABEL_CHAR '\002' | |
60 | ||
252b5132 | 61 | struct obstack notes; |
977cdf5a NC |
62 | #ifdef USE_UNIQUE |
63 | /* The name of an external symbol which is | |
64 | used to make weak PE symbol names unique. */ | |
65 | const char * an_external_name; | |
66 | #endif | |
252b5132 | 67 | |
74937d39 KH |
68 | static char *save_symbol_name (const char *); |
69 | static void fb_label_init (void); | |
70 | static long dollar_label_instance (long); | |
71 | static long fb_label_instance (long); | |
252b5132 | 72 | |
74937d39 KH |
73 | static void print_binary (FILE *, const char *, expressionS *); |
74 | static void report_op_error (symbolS *, symbolS *, symbolS *); | |
252b5132 | 75 | |
7c743825 | 76 | /* Return a pointer to a new symbol. Die if we can't make a new |
252b5132 RH |
77 | symbol. Fill in the symbol's values. Add symbol to end of symbol |
78 | chain. | |
7c743825 | 79 | |
252b5132 RH |
80 | This function should be called in the general case of creating a |
81 | symbol. However, if the output file symbol table has already been | |
82 | set, and you are certain that this symbol won't be wanted in the | |
83 | output file, you can call symbol_create. */ | |
84 | ||
85 | symbolS * | |
74937d39 | 86 | symbol_new (const char *name, segT segment, valueT valu, fragS *frag) |
252b5132 RH |
87 | { |
88 | symbolS *symbolP = symbol_create (name, segment, valu, frag); | |
89 | ||
7c743825 | 90 | /* Link to end of symbol chain. */ |
252b5132 RH |
91 | { |
92 | extern int symbol_table_frozen; | |
93 | if (symbol_table_frozen) | |
94 | abort (); | |
95 | } | |
252b5132 RH |
96 | symbol_append (symbolP, symbol_lastP, &symbol_rootP, &symbol_lastP); |
97 | ||
98 | return symbolP; | |
99 | } | |
100 | ||
49309057 ILT |
101 | /* Save a symbol name on a permanent obstack, and convert it according |
102 | to the object file format. */ | |
103 | ||
104 | static char * | |
74937d39 | 105 | save_symbol_name (const char *name) |
252b5132 RH |
106 | { |
107 | unsigned int name_length; | |
49309057 | 108 | char *ret; |
252b5132 | 109 | |
7c743825 | 110 | name_length = strlen (name) + 1; /* +1 for \0. */ |
252b5132 | 111 | obstack_grow (¬es, name, name_length); |
49309057 ILT |
112 | ret = obstack_finish (¬es); |
113 | ||
252b5132 | 114 | #ifdef tc_canonicalize_symbol_name |
49309057 | 115 | ret = tc_canonicalize_symbol_name (ret); |
252b5132 RH |
116 | #endif |
117 | ||
118 | if (! symbols_case_sensitive) | |
119 | { | |
3882b010 | 120 | char *s; |
252b5132 | 121 | |
3882b010 L |
122 | for (s = ret; *s != '\0'; s++) |
123 | *s = TOUPPER (*s); | |
252b5132 RH |
124 | } |
125 | ||
49309057 ILT |
126 | return ret; |
127 | } | |
128 | ||
129 | symbolS * | |
74937d39 KH |
130 | symbol_create (const char *name, /* It is copied, the caller can destroy/modify. */ |
131 | segT segment, /* Segment identifier (SEG_<something>). */ | |
132 | valueT valu, /* Symbol value. */ | |
133 | fragS *frag /* Associated fragment. */) | |
49309057 ILT |
134 | { |
135 | char *preserved_copy_of_name; | |
136 | symbolS *symbolP; | |
137 | ||
138 | preserved_copy_of_name = save_symbol_name (name); | |
139 | ||
252b5132 RH |
140 | symbolP = (symbolS *) obstack_alloc (¬es, sizeof (symbolS)); |
141 | ||
7c743825 | 142 | /* symbol must be born in some fixed state. This seems as good as any. */ |
252b5132 RH |
143 | memset (symbolP, 0, sizeof (symbolS)); |
144 | ||
252b5132 RH |
145 | symbolP->bsym = bfd_make_empty_symbol (stdoutput); |
146 | if (symbolP->bsym == NULL) | |
147 | as_perror ("%s", "bfd_make_empty_symbol"); | |
148 | symbolP->bsym->udata.p = (PTR) symbolP; | |
252b5132 RH |
149 | S_SET_NAME (symbolP, preserved_copy_of_name); |
150 | ||
151 | S_SET_SEGMENT (symbolP, segment); | |
152 | S_SET_VALUE (symbolP, valu); | |
153 | symbol_clear_list_pointers (symbolP); | |
154 | ||
155 | symbolP->sy_frag = frag; | |
252b5132 RH |
156 | |
157 | obj_symbol_new_hook (symbolP); | |
158 | ||
159 | #ifdef tc_symbol_new_hook | |
160 | tc_symbol_new_hook (symbolP); | |
161 | #endif | |
162 | ||
163 | return symbolP; | |
164 | } | |
165 | \f | |
49309057 ILT |
166 | |
167 | /* Local symbol support. If we can get away with it, we keep only a | |
168 | small amount of information for local symbols. */ | |
169 | ||
74937d39 | 170 | static symbolS *local_symbol_convert (struct local_symbol *); |
49309057 ILT |
171 | |
172 | /* Used for statistics. */ | |
173 | ||
174 | static unsigned long local_symbol_count; | |
175 | static unsigned long local_symbol_conversion_count; | |
176 | ||
177 | /* This macro is called with a symbol argument passed by reference. | |
178 | It returns whether this is a local symbol. If necessary, it | |
179 | changes its argument to the real symbol. */ | |
180 | ||
181 | #define LOCAL_SYMBOL_CHECK(s) \ | |
182 | (s->bsym == NULL \ | |
183 | ? (local_symbol_converted_p ((struct local_symbol *) s) \ | |
184 | ? (s = local_symbol_get_real_symbol ((struct local_symbol *) s), \ | |
185 | 0) \ | |
186 | : 1) \ | |
187 | : 0) | |
188 | ||
189 | /* Create a local symbol and insert it into the local hash table. */ | |
190 | ||
87c245cc | 191 | static struct local_symbol * |
74937d39 | 192 | local_symbol_make (const char *name, segT section, valueT value, fragS *frag) |
49309057 ILT |
193 | { |
194 | char *name_copy; | |
195 | struct local_symbol *ret; | |
196 | ||
197 | ++local_symbol_count; | |
198 | ||
199 | name_copy = save_symbol_name (name); | |
200 | ||
201 | ret = (struct local_symbol *) obstack_alloc (¬es, sizeof *ret); | |
202 | ret->lsy_marker = NULL; | |
203 | ret->lsy_name = name_copy; | |
204 | ret->lsy_section = section; | |
205 | local_symbol_set_frag (ret, frag); | |
bd780143 | 206 | ret->lsy_value = value; |
49309057 ILT |
207 | |
208 | hash_jam (local_hash, name_copy, (PTR) ret); | |
209 | ||
210 | return ret; | |
211 | } | |
212 | ||
213 | /* Convert a local symbol into a real symbol. Note that we do not | |
214 | reclaim the space used by the local symbol. */ | |
215 | ||
216 | static symbolS * | |
74937d39 | 217 | local_symbol_convert (struct local_symbol *locsym) |
49309057 ILT |
218 | { |
219 | symbolS *ret; | |
220 | ||
221 | assert (locsym->lsy_marker == NULL); | |
222 | if (local_symbol_converted_p (locsym)) | |
223 | return local_symbol_get_real_symbol (locsym); | |
224 | ||
225 | ++local_symbol_conversion_count; | |
226 | ||
bd780143 | 227 | ret = symbol_new (locsym->lsy_name, locsym->lsy_section, locsym->lsy_value, |
49309057 ILT |
228 | local_symbol_get_frag (locsym)); |
229 | ||
230 | if (local_symbol_resolved_p (locsym)) | |
231 | ret->sy_resolved = 1; | |
232 | ||
233 | /* Local symbols are always either defined or used. */ | |
234 | ret->sy_used = 1; | |
235 | ||
8c5e1ccd AO |
236 | #ifdef TC_LOCAL_SYMFIELD_CONVERT |
237 | TC_LOCAL_SYMFIELD_CONVERT (locsym, ret); | |
238 | #endif | |
239 | ||
49309057 ILT |
240 | symbol_table_insert (ret); |
241 | ||
242 | local_symbol_mark_converted (locsym); | |
243 | local_symbol_set_real_symbol (locsym, ret); | |
244 | ||
245 | hash_jam (local_hash, locsym->lsy_name, NULL); | |
246 | ||
247 | return ret; | |
248 | } | |
49309057 | 249 | \f |
7c743825 KH |
250 | /* We have just seen "<name>:". |
251 | Creates a struct symbol unless it already exists. | |
252 | ||
253 | Gripes if we are redefining a symbol incompatibly (and ignores it). */ | |
252b5132 | 254 | |
252b5132 | 255 | symbolS * |
74937d39 KH |
256 | colon (/* Just seen "x:" - rattle symbols & frags. */ |
257 | const char *sym_name /* Symbol name, as a cannonical string. */ | |
258 | /* We copy this string: OK to alter later. */) | |
252b5132 | 259 | { |
7c743825 | 260 | register symbolS *symbolP; /* Symbol we are working with. */ |
252b5132 | 261 | |
7cf10893 | 262 | /* Sun local labels go out of scope whenever a non-local symbol is |
252b5132 | 263 | defined. */ |
7be1c489 AM |
264 | if (LOCAL_LABELS_DOLLAR |
265 | && !bfd_is_local_label_name (stdoutput, sym_name)) | |
266 | dollar_label_clear (); | |
252b5132 RH |
267 | |
268 | #ifndef WORKING_DOT_WORD | |
269 | if (new_broken_words) | |
270 | { | |
271 | struct broken_word *a; | |
272 | int possible_bytes; | |
273 | fragS *frag_tmp; | |
274 | char *frag_opcode; | |
275 | ||
7cf10893 NC |
276 | if (now_seg == absolute_section) |
277 | { | |
278 | as_bad (_("cannot define symbol `%s' in absolute section"), sym_name); | |
279 | return NULL; | |
280 | } | |
1d3b2b27 | 281 | |
252b5132 RH |
282 | possible_bytes = (md_short_jump_size |
283 | + new_broken_words * md_long_jump_size); | |
284 | ||
285 | frag_tmp = frag_now; | |
286 | frag_opcode = frag_var (rs_broken_word, | |
287 | possible_bytes, | |
288 | possible_bytes, | |
289 | (relax_substateT) 0, | |
290 | (symbolS *) broken_words, | |
291 | (offsetT) 0, | |
292 | NULL); | |
293 | ||
7c743825 KH |
294 | /* We want to store the pointer to where to insert the jump |
295 | table in the fr_opcode of the rs_broken_word frag. This | |
296 | requires a little hackery. */ | |
252b5132 RH |
297 | while (frag_tmp |
298 | && (frag_tmp->fr_type != rs_broken_word | |
299 | || frag_tmp->fr_opcode)) | |
300 | frag_tmp = frag_tmp->fr_next; | |
301 | know (frag_tmp); | |
302 | frag_tmp->fr_opcode = frag_opcode; | |
303 | new_broken_words = 0; | |
304 | ||
305 | for (a = broken_words; a && a->dispfrag == 0; a = a->next_broken_word) | |
306 | a->dispfrag = frag_tmp; | |
307 | } | |
308 | #endif /* WORKING_DOT_WORD */ | |
309 | ||
310 | if ((symbolP = symbol_find (sym_name)) != 0) | |
311 | { | |
312 | #ifdef RESOLVE_SYMBOL_REDEFINITION | |
313 | if (RESOLVE_SYMBOL_REDEFINITION (symbolP)) | |
314 | return symbolP; | |
315 | #endif | |
7c743825 | 316 | /* Now check for undefined symbols. */ |
49309057 ILT |
317 | if (LOCAL_SYMBOL_CHECK (symbolP)) |
318 | { | |
319 | struct local_symbol *locsym = (struct local_symbol *) symbolP; | |
320 | ||
321 | if (locsym->lsy_section != undefined_section | |
322 | && (local_symbol_get_frag (locsym) != frag_now | |
323 | || locsym->lsy_section != now_seg | |
bd780143 | 324 | || locsym->lsy_value != frag_now_fix ())) |
49309057 | 325 | { |
0e389e77 | 326 | as_bad (_("symbol `%s' is already defined"), sym_name); |
49309057 ILT |
327 | return symbolP; |
328 | } | |
329 | ||
330 | locsym->lsy_section = now_seg; | |
331 | local_symbol_set_frag (locsym, frag_now); | |
bd780143 | 332 | locsym->lsy_value = frag_now_fix (); |
49309057 ILT |
333 | } |
334 | else if (!S_IS_DEFINED (symbolP) || S_IS_COMMON (symbolP)) | |
252b5132 RH |
335 | { |
336 | if (S_GET_VALUE (symbolP) == 0) | |
337 | { | |
338 | symbolP->sy_frag = frag_now; | |
339 | #ifdef OBJ_VMS | |
7c743825 | 340 | S_SET_OTHER (symbolP, const_flag); |
252b5132 RH |
341 | #endif |
342 | S_SET_VALUE (symbolP, (valueT) frag_now_fix ()); | |
343 | S_SET_SEGMENT (symbolP, now_seg); | |
344 | #ifdef N_UNDF | |
345 | know (N_UNDF == 0); | |
7c743825 | 346 | #endif /* if we have one, it better be zero. */ |
252b5132 RH |
347 | |
348 | } | |
349 | else | |
350 | { | |
7c743825 KH |
351 | /* There are still several cases to check: |
352 | ||
353 | A .comm/.lcomm symbol being redefined as initialized | |
354 | data is OK | |
355 | ||
356 | A .comm/.lcomm symbol being redefined with a larger | |
357 | size is also OK | |
358 | ||
359 | This only used to be allowed on VMS gas, but Sun cc | |
360 | on the sparc also depends on it. */ | |
252b5132 RH |
361 | |
362 | if (((!S_IS_DEBUG (symbolP) | |
363 | && (!S_IS_DEFINED (symbolP) || S_IS_COMMON (symbolP)) | |
364 | && S_IS_EXTERNAL (symbolP)) | |
365 | || S_GET_SEGMENT (symbolP) == bss_section) | |
366 | && (now_seg == data_section | |
367 | || now_seg == S_GET_SEGMENT (symbolP))) | |
368 | { | |
7c743825 | 369 | /* Select which of the 2 cases this is. */ |
252b5132 RH |
370 | if (now_seg != data_section) |
371 | { | |
7c743825 KH |
372 | /* New .comm for prev .comm symbol. |
373 | ||
374 | If the new size is larger we just change its | |
375 | value. If the new size is smaller, we ignore | |
376 | this symbol. */ | |
252b5132 RH |
377 | if (S_GET_VALUE (symbolP) |
378 | < ((unsigned) frag_now_fix ())) | |
379 | { | |
380 | S_SET_VALUE (symbolP, (valueT) frag_now_fix ()); | |
381 | } | |
382 | } | |
383 | else | |
384 | { | |
385 | /* It is a .comm/.lcomm being converted to initialized | |
386 | data. */ | |
387 | symbolP->sy_frag = frag_now; | |
388 | #ifdef OBJ_VMS | |
7c743825 | 389 | S_SET_OTHER (symbolP, const_flag); |
252b5132 RH |
390 | #endif |
391 | S_SET_VALUE (symbolP, (valueT) frag_now_fix ()); | |
7c743825 | 392 | S_SET_SEGMENT (symbolP, now_seg); /* Keep N_EXT bit. */ |
252b5132 RH |
393 | } |
394 | } | |
395 | else | |
396 | { | |
4c63da97 AM |
397 | #if (!defined (OBJ_AOUT) && !defined (OBJ_MAYBE_AOUT) \ |
398 | && !defined (OBJ_BOUT) && !defined (OBJ_MAYBE_BOUT)) | |
399 | static const char *od_buf = ""; | |
252b5132 | 400 | #else |
4c63da97 AM |
401 | char od_buf[100]; |
402 | od_buf[0] = '\0'; | |
4c63da97 | 403 | if (OUTPUT_FLAVOR == bfd_target_aout_flavour) |
d1a6c242 KH |
404 | sprintf (od_buf, "%d.%d.", |
405 | S_GET_OTHER (symbolP), | |
406 | S_GET_DESC (symbolP)); | |
4c63da97 | 407 | #endif |
0e389e77 | 408 | as_bad (_("symbol `%s' is already defined as \"%s\"/%s%ld"), |
252b5132 RH |
409 | sym_name, |
410 | segment_name (S_GET_SEGMENT (symbolP)), | |
4c63da97 | 411 | od_buf, |
252b5132 | 412 | (long) S_GET_VALUE (symbolP)); |
252b5132 | 413 | } |
7c743825 | 414 | } /* if the undefined symbol has no value */ |
252b5132 RH |
415 | } |
416 | else | |
417 | { | |
7c743825 | 418 | /* Don't blow up if the definition is the same. */ |
252b5132 RH |
419 | if (!(frag_now == symbolP->sy_frag |
420 | && S_GET_VALUE (symbolP) == frag_now_fix () | |
421 | && S_GET_SEGMENT (symbolP) == now_seg)) | |
0e389e77 | 422 | as_bad (_("symbol `%s' is already defined"), sym_name); |
d4887adc | 423 | } |
252b5132 RH |
424 | |
425 | } | |
49309057 ILT |
426 | else if (! flag_keep_locals && bfd_is_local_label_name (stdoutput, sym_name)) |
427 | { | |
428 | symbolP = (symbolS *) local_symbol_make (sym_name, now_seg, | |
429 | (valueT) frag_now_fix (), | |
430 | frag_now); | |
431 | } | |
252b5132 RH |
432 | else |
433 | { | |
434 | symbolP = symbol_new (sym_name, now_seg, (valueT) frag_now_fix (), | |
435 | frag_now); | |
436 | #ifdef OBJ_VMS | |
437 | S_SET_OTHER (symbolP, const_flag); | |
438 | #endif /* OBJ_VMS */ | |
439 | ||
440 | symbol_table_insert (symbolP); | |
d4887adc | 441 | } |
252b5132 RH |
442 | |
443 | if (mri_common_symbol != NULL) | |
444 | { | |
445 | /* This symbol is actually being defined within an MRI common | |
1d3b2b27 | 446 | section. This requires special handling. */ |
49309057 ILT |
447 | if (LOCAL_SYMBOL_CHECK (symbolP)) |
448 | symbolP = local_symbol_convert ((struct local_symbol *) symbolP); | |
252b5132 RH |
449 | symbolP->sy_value.X_op = O_symbol; |
450 | symbolP->sy_value.X_add_symbol = mri_common_symbol; | |
451 | symbolP->sy_value.X_add_number = S_GET_VALUE (mri_common_symbol); | |
452 | symbolP->sy_frag = &zero_address_frag; | |
453 | S_SET_SEGMENT (symbolP, expr_section); | |
454 | symbolP->sy_mri_common = 1; | |
455 | } | |
456 | ||
457 | #ifdef tc_frob_label | |
458 | tc_frob_label (symbolP); | |
459 | #endif | |
460 | #ifdef obj_frob_label | |
461 | obj_frob_label (symbolP); | |
462 | #endif | |
463 | ||
464 | return symbolP; | |
465 | } | |
466 | \f | |
7c743825 | 467 | /* Die if we can't insert the symbol. */ |
252b5132 | 468 | |
7c743825 | 469 | void |
74937d39 | 470 | symbol_table_insert (symbolS *symbolP) |
252b5132 RH |
471 | { |
472 | register const char *error_string; | |
473 | ||
474 | know (symbolP); | |
475 | know (S_GET_NAME (symbolP)); | |
476 | ||
49309057 ILT |
477 | if (LOCAL_SYMBOL_CHECK (symbolP)) |
478 | { | |
479 | error_string = hash_jam (local_hash, S_GET_NAME (symbolP), | |
480 | (PTR) symbolP); | |
481 | if (error_string != NULL) | |
0e389e77 | 482 | as_fatal (_("inserting \"%s\" into symbol table failed: %s"), |
49309057 ILT |
483 | S_GET_NAME (symbolP), error_string); |
484 | return; | |
485 | } | |
486 | ||
252b5132 RH |
487 | if ((error_string = hash_jam (sy_hash, S_GET_NAME (symbolP), (PTR) symbolP))) |
488 | { | |
0e389e77 | 489 | as_fatal (_("inserting \"%s\" into symbol table failed: %s"), |
252b5132 | 490 | S_GET_NAME (symbolP), error_string); |
7c743825 KH |
491 | } /* on error */ |
492 | } | |
252b5132 | 493 | \f |
7c743825 KH |
494 | /* If a symbol name does not exist, create it as undefined, and insert |
495 | it into the symbol table. Return a pointer to it. */ | |
496 | ||
252b5132 | 497 | symbolS * |
74937d39 | 498 | symbol_find_or_make (const char *name) |
252b5132 RH |
499 | { |
500 | register symbolS *symbolP; | |
501 | ||
502 | symbolP = symbol_find (name); | |
503 | ||
504 | if (symbolP == NULL) | |
505 | { | |
49309057 ILT |
506 | if (! flag_keep_locals && bfd_is_local_label_name (stdoutput, name)) |
507 | { | |
508 | symbolP = md_undefined_symbol ((char *) name); | |
509 | if (symbolP != NULL) | |
510 | return symbolP; | |
511 | ||
512 | symbolP = (symbolS *) local_symbol_make (name, undefined_section, | |
513 | (valueT) 0, | |
514 | &zero_address_frag); | |
515 | return symbolP; | |
516 | } | |
49309057 | 517 | |
252b5132 RH |
518 | symbolP = symbol_make (name); |
519 | ||
520 | symbol_table_insert (symbolP); | |
521 | } /* if symbol wasn't found */ | |
522 | ||
523 | return (symbolP); | |
7c743825 | 524 | } |
252b5132 RH |
525 | |
526 | symbolS * | |
74937d39 | 527 | symbol_make (const char *name) |
252b5132 RH |
528 | { |
529 | symbolS *symbolP; | |
530 | ||
7c743825 | 531 | /* Let the machine description default it, e.g. for register names. */ |
252b5132 RH |
532 | symbolP = md_undefined_symbol ((char *) name); |
533 | ||
534 | if (!symbolP) | |
535 | symbolP = symbol_new (name, undefined_section, (valueT) 0, &zero_address_frag); | |
536 | ||
537 | return (symbolP); | |
7c743825 | 538 | } |
252b5132 | 539 | |
9497f5ac NC |
540 | symbolS * |
541 | symbol_clone (symbolS *orgsymP, int replace) | |
542 | { | |
543 | symbolS *newsymP; | |
544 | ||
545 | /* Running local_symbol_convert on a clone that's not the one currently | |
546 | in local_hash would incorrectly replace the hash entry. Thus the | |
547 | symbol must be converted here. Note that the rest of the function | |
548 | depends on not encountering an unconverted symbol. */ | |
549 | if (LOCAL_SYMBOL_CHECK (orgsymP)) | |
550 | orgsymP = local_symbol_convert ((struct local_symbol *) orgsymP); | |
551 | ||
552 | know (S_IS_DEFINED (orgsymP)); | |
553 | ||
554 | newsymP = obstack_alloc (¬es, sizeof (*newsymP)); | |
555 | *newsymP = *orgsymP; | |
556 | ||
557 | if (replace) | |
558 | { | |
559 | if (symbol_rootP == orgsymP) | |
560 | symbol_rootP = newsymP; | |
561 | else if (orgsymP->sy_previous) | |
562 | { | |
563 | orgsymP->sy_previous->sy_next = newsymP; | |
564 | orgsymP->sy_previous = NULL; | |
565 | } | |
566 | if (symbol_lastP == orgsymP) | |
567 | symbol_lastP = newsymP; | |
568 | else if (orgsymP->sy_next) | |
569 | orgsymP->sy_next->sy_previous = newsymP; | |
570 | orgsymP->sy_next = NULL; | |
571 | debug_verify_symchain (symbol_rootP, symbol_lastP); | |
572 | ||
573 | symbol_table_insert (newsymP); | |
574 | } | |
575 | ||
576 | return newsymP; | |
577 | } | |
578 | ||
579 | /* Referenced symbols, if they are forward references, need to be cloned | |
580 | (without replacing the original) so that the value of the referenced | |
581 | symbols at the point of use . */ | |
582 | ||
583 | #undef symbol_clone_if_forward_ref | |
584 | symbolS * | |
585 | symbol_clone_if_forward_ref (symbolS *symbolP, int is_forward) | |
586 | { | |
587 | if (symbolP && !LOCAL_SYMBOL_CHECK (symbolP)) | |
588 | { | |
589 | symbolS *add_symbol = symbolP->sy_value.X_add_symbol; | |
590 | symbolS *op_symbol = symbolP->sy_value.X_op_symbol; | |
591 | ||
592 | if (symbolP->sy_forward_ref) | |
593 | is_forward = 1; | |
594 | ||
595 | if (is_forward) | |
596 | { | |
597 | /* assign_symbol() clones volatile symbols; pre-existing expressions | |
598 | hold references to the original instance, but want the current | |
599 | value. Just repeat the lookup. */ | |
600 | if (add_symbol && S_IS_VOLATILE (add_symbol)) | |
601 | add_symbol = symbol_find_exact (S_GET_NAME (add_symbol)); | |
602 | if (op_symbol && S_IS_VOLATILE (op_symbol)) | |
603 | op_symbol = symbol_find_exact (S_GET_NAME (op_symbol)); | |
604 | } | |
605 | ||
606 | /* Re-using sy_resolving here, as this routine cannot get called from | |
607 | symbol resolution code. */ | |
608 | if (symbolP->bsym->section == expr_section && !symbolP->sy_resolving) | |
609 | { | |
610 | symbolP->sy_resolving = 1; | |
611 | add_symbol = symbol_clone_if_forward_ref (add_symbol, is_forward); | |
612 | op_symbol = symbol_clone_if_forward_ref (op_symbol, is_forward); | |
613 | symbolP->sy_resolving = 0; | |
614 | } | |
615 | ||
616 | if (symbolP->sy_forward_ref | |
617 | || add_symbol != symbolP->sy_value.X_add_symbol | |
618 | || op_symbol != symbolP->sy_value.X_op_symbol) | |
619 | symbolP = symbol_clone (symbolP, 0); | |
620 | ||
621 | symbolP->sy_value.X_add_symbol = add_symbol; | |
622 | symbolP->sy_value.X_op_symbol = op_symbol; | |
623 | } | |
624 | ||
625 | return symbolP; | |
626 | } | |
627 | ||
b7d6ed97 | 628 | symbolS * |
74937d39 | 629 | symbol_temp_new (segT seg, valueT ofs, fragS *frag) |
b7d6ed97 | 630 | { |
756d1d01 | 631 | return symbol_new (FAKE_LABEL_NAME, seg, ofs, frag); |
b7d6ed97 RH |
632 | } |
633 | ||
634 | symbolS * | |
74937d39 | 635 | symbol_temp_new_now (void) |
b7d6ed97 RH |
636 | { |
637 | return symbol_temp_new (now_seg, frag_now_fix (), frag_now); | |
638 | } | |
639 | ||
640 | symbolS * | |
74937d39 | 641 | symbol_temp_make (void) |
b7d6ed97 | 642 | { |
756d1d01 | 643 | return symbol_make (FAKE_LABEL_NAME); |
b7d6ed97 RH |
644 | } |
645 | ||
7c743825 KH |
646 | /* Implement symbol table lookup. |
647 | In: A symbol's name as a string: '\0' can't be part of a symbol name. | |
648 | Out: NULL if the name was not in the symbol table, else the address | |
649 | of a struct symbol associated with that name. */ | |
252b5132 | 650 | |
9758f3fc | 651 | symbolS * |
74937d39 | 652 | symbol_find_exact (const char *name) |
9758f3fc | 653 | { |
7be1c489 | 654 | struct local_symbol *locsym; |
9758f3fc | 655 | |
7be1c489 AM |
656 | locsym = (struct local_symbol *) hash_find (local_hash, name); |
657 | if (locsym != NULL) | |
658 | return (symbolS *) locsym; | |
9758f3fc AM |
659 | |
660 | return ((symbolS *) hash_find (sy_hash, name)); | |
661 | } | |
662 | ||
252b5132 | 663 | symbolS * |
91c4c449 | 664 | symbol_find (const char *name) |
252b5132 | 665 | { |
252b5132 RH |
666 | #ifdef tc_canonicalize_symbol_name |
667 | { | |
668 | char *copy; | |
03987ced | 669 | size_t len = strlen (name) + 1; |
252b5132 | 670 | |
03987ced RH |
671 | copy = (char *) alloca (len); |
672 | memcpy (copy, name, len); | |
252b5132 RH |
673 | name = tc_canonicalize_symbol_name (copy); |
674 | } | |
675 | #endif | |
676 | ||
677 | if (! symbols_case_sensitive) | |
678 | { | |
03987ced RH |
679 | char *copy; |
680 | const char *orig; | |
681 | unsigned char c; | |
682 | ||
683 | orig = name; | |
684 | name = copy = (char *) alloca (strlen (name) + 1); | |
685 | ||
686 | while ((c = *orig++) != '\0') | |
687 | { | |
3882b010 | 688 | *copy++ = TOUPPER (c); |
03987ced RH |
689 | } |
690 | *copy = '\0'; | |
252b5132 RH |
691 | } |
692 | ||
9758f3fc | 693 | return symbol_find_exact (name); |
252b5132 RH |
694 | } |
695 | ||
7c743825 KH |
696 | /* Once upon a time, symbols were kept in a singly linked list. At |
697 | least coff needs to be able to rearrange them from time to time, for | |
698 | which a doubly linked list is much more convenient. Loic did these | |
699 | as macros which seemed dangerous to me so they're now functions. | |
700 | xoxorich. */ | |
701 | ||
702 | /* Link symbol ADDME after symbol TARGET in the chain. */ | |
252b5132 | 703 | |
7c743825 | 704 | void |
74937d39 KH |
705 | symbol_append (symbolS *addme, symbolS *target, |
706 | symbolS **rootPP, symbolS **lastPP) | |
252b5132 | 707 | { |
49309057 ILT |
708 | if (LOCAL_SYMBOL_CHECK (addme)) |
709 | abort (); | |
710 | if (target != NULL && LOCAL_SYMBOL_CHECK (target)) | |
711 | abort (); | |
712 | ||
252b5132 RH |
713 | if (target == NULL) |
714 | { | |
715 | know (*rootPP == NULL); | |
716 | know (*lastPP == NULL); | |
717 | addme->sy_next = NULL; | |
252b5132 | 718 | addme->sy_previous = NULL; |
252b5132 RH |
719 | *rootPP = addme; |
720 | *lastPP = addme; | |
721 | return; | |
7c743825 | 722 | } /* if the list is empty */ |
252b5132 RH |
723 | |
724 | if (target->sy_next != NULL) | |
725 | { | |
252b5132 | 726 | target->sy_next->sy_previous = addme; |
252b5132 RH |
727 | } |
728 | else | |
729 | { | |
730 | know (*lastPP == target); | |
731 | *lastPP = addme; | |
7c743825 | 732 | } /* if we have a next */ |
252b5132 RH |
733 | |
734 | addme->sy_next = target->sy_next; | |
735 | target->sy_next = addme; | |
252b5132 | 736 | addme->sy_previous = target; |
252b5132 RH |
737 | |
738 | debug_verify_symchain (symbol_rootP, symbol_lastP); | |
739 | } | |
740 | ||
7c743825 KH |
741 | /* Set the chain pointers of SYMBOL to null. */ |
742 | ||
743 | void | |
74937d39 | 744 | symbol_clear_list_pointers (symbolS *symbolP) |
252b5132 | 745 | { |
49309057 ILT |
746 | if (LOCAL_SYMBOL_CHECK (symbolP)) |
747 | abort (); | |
252b5132 | 748 | symbolP->sy_next = NULL; |
252b5132 | 749 | symbolP->sy_previous = NULL; |
252b5132 RH |
750 | } |
751 | ||
7c743825 KH |
752 | /* Remove SYMBOLP from the list. */ |
753 | ||
754 | void | |
74937d39 | 755 | symbol_remove (symbolS *symbolP, symbolS **rootPP, symbolS **lastPP) |
252b5132 | 756 | { |
49309057 ILT |
757 | if (LOCAL_SYMBOL_CHECK (symbolP)) |
758 | abort (); | |
759 | ||
252b5132 RH |
760 | if (symbolP == *rootPP) |
761 | { | |
762 | *rootPP = symbolP->sy_next; | |
7c743825 | 763 | } /* if it was the root */ |
252b5132 RH |
764 | |
765 | if (symbolP == *lastPP) | |
766 | { | |
767 | *lastPP = symbolP->sy_previous; | |
7c743825 | 768 | } /* if it was the tail */ |
252b5132 RH |
769 | |
770 | if (symbolP->sy_next != NULL) | |
771 | { | |
772 | symbolP->sy_next->sy_previous = symbolP->sy_previous; | |
7c743825 | 773 | } /* if not last */ |
252b5132 RH |
774 | |
775 | if (symbolP->sy_previous != NULL) | |
776 | { | |
777 | symbolP->sy_previous->sy_next = symbolP->sy_next; | |
7c743825 | 778 | } /* if not first */ |
252b5132 RH |
779 | |
780 | debug_verify_symchain (*rootPP, *lastPP); | |
781 | } | |
782 | ||
7c743825 KH |
783 | /* Link symbol ADDME before symbol TARGET in the chain. */ |
784 | ||
785 | void | |
74937d39 KH |
786 | symbol_insert (symbolS *addme, symbolS *target, |
787 | symbolS **rootPP, symbolS **lastPP ATTRIBUTE_UNUSED) | |
252b5132 | 788 | { |
49309057 ILT |
789 | if (LOCAL_SYMBOL_CHECK (addme)) |
790 | abort (); | |
791 | if (LOCAL_SYMBOL_CHECK (target)) | |
792 | abort (); | |
793 | ||
252b5132 RH |
794 | if (target->sy_previous != NULL) |
795 | { | |
796 | target->sy_previous->sy_next = addme; | |
797 | } | |
798 | else | |
799 | { | |
800 | know (*rootPP == target); | |
801 | *rootPP = addme; | |
7c743825 | 802 | } /* if not first */ |
252b5132 RH |
803 | |
804 | addme->sy_previous = target->sy_previous; | |
805 | target->sy_previous = addme; | |
806 | addme->sy_next = target; | |
807 | ||
808 | debug_verify_symchain (*rootPP, *lastPP); | |
809 | } | |
810 | ||
7c743825 | 811 | void |
74937d39 | 812 | verify_symbol_chain (symbolS *rootP, symbolS *lastP) |
252b5132 RH |
813 | { |
814 | symbolS *symbolP = rootP; | |
815 | ||
816 | if (symbolP == NULL) | |
817 | return; | |
818 | ||
819 | for (; symbol_next (symbolP) != NULL; symbolP = symbol_next (symbolP)) | |
820 | { | |
49309057 | 821 | assert (symbolP->bsym != NULL); |
252b5132 | 822 | assert (symbolP->sy_next->sy_previous == symbolP); |
252b5132 RH |
823 | } |
824 | ||
825 | assert (lastP == symbolP); | |
826 | } | |
827 | ||
0909233e | 828 | static void |
74937d39 | 829 | report_op_error (symbolS *symp, symbolS *left, symbolS *right) |
0909233e AM |
830 | { |
831 | char *file; | |
832 | unsigned int line; | |
833 | segT seg_left = S_GET_SEGMENT (left); | |
834 | segT seg_right = right ? S_GET_SEGMENT (right) : 0; | |
1d3b2b27 | 835 | |
0909233e AM |
836 | if (expr_symbol_where (symp, &file, &line)) |
837 | { | |
838 | if (seg_left == undefined_section) | |
839 | as_bad_where (file, line, | |
840 | _("undefined symbol `%s' in operation"), | |
841 | S_GET_NAME (left)); | |
842 | if (seg_right == undefined_section) | |
843 | as_bad_where (file, line, | |
844 | _("undefined symbol `%s' in operation"), | |
845 | S_GET_NAME (right)); | |
846 | if (seg_left != undefined_section | |
847 | && seg_right != undefined_section) | |
848 | { | |
849 | if (right) | |
850 | as_bad_where (file, line, | |
851 | _("invalid sections for operation on `%s' and `%s'"), | |
852 | S_GET_NAME (left), S_GET_NAME (right)); | |
853 | else | |
854 | as_bad_where (file, line, | |
855 | _("invalid section for operation on `%s'"), | |
856 | S_GET_NAME (left)); | |
857 | } | |
1d3b2b27 | 858 | |
0909233e AM |
859 | } |
860 | else | |
861 | { | |
862 | if (seg_left == undefined_section) | |
863 | as_bad (_("undefined symbol `%s' in operation setting `%s'"), | |
864 | S_GET_NAME (left), S_GET_NAME (symp)); | |
865 | if (seg_right == undefined_section) | |
866 | as_bad (_("undefined symbol `%s' in operation setting `%s'"), | |
867 | S_GET_NAME (right), S_GET_NAME (symp)); | |
868 | if (seg_left != undefined_section | |
869 | && seg_right != undefined_section) | |
870 | { | |
871 | if (right) | |
872 | as_bad_where (file, line, | |
873 | _("invalid sections for operation on `%s' and `%s' setting `%s'"), | |
874 | S_GET_NAME (left), S_GET_NAME (right), S_GET_NAME (symp)); | |
875 | else | |
876 | as_bad_where (file, line, | |
877 | _("invalid section for operation on `%s' setting `%s'"), | |
878 | S_GET_NAME (left), S_GET_NAME (symp)); | |
879 | } | |
880 | } | |
881 | } | |
882 | ||
252b5132 RH |
883 | /* Resolve the value of a symbol. This is called during the final |
884 | pass over the symbol table to resolve any symbols with complex | |
885 | values. */ | |
886 | ||
887 | valueT | |
74937d39 | 888 | resolve_symbol_value (symbolS *symp) |
252b5132 RH |
889 | { |
890 | int resolved; | |
03e83a45 | 891 | valueT final_val = 0; |
252b5132 RH |
892 | segT final_seg; |
893 | ||
49309057 ILT |
894 | if (LOCAL_SYMBOL_CHECK (symp)) |
895 | { | |
896 | struct local_symbol *locsym = (struct local_symbol *) symp; | |
897 | ||
bd780143 | 898 | final_val = locsym->lsy_value; |
49309057 | 899 | if (local_symbol_resolved_p (locsym)) |
bd780143 | 900 | return final_val; |
49309057 | 901 | |
bd780143 | 902 | final_val += local_symbol_get_frag (locsym)->fr_address / OCTETS_PER_BYTE; |
49309057 | 903 | |
6386f3a7 | 904 | if (finalize_syms) |
49309057 | 905 | { |
bd780143 | 906 | locsym->lsy_value = final_val; |
49309057 ILT |
907 | local_symbol_mark_resolved (locsym); |
908 | } | |
909 | ||
910 | return final_val; | |
911 | } | |
912 | ||
252b5132 RH |
913 | if (symp->sy_resolved) |
914 | { | |
915 | if (symp->sy_value.X_op == O_constant) | |
916 | return (valueT) symp->sy_value.X_add_number; | |
917 | else | |
918 | return 0; | |
919 | } | |
920 | ||
921 | resolved = 0; | |
922 | final_seg = S_GET_SEGMENT (symp); | |
923 | ||
924 | if (symp->sy_resolving) | |
925 | { | |
6386f3a7 | 926 | if (finalize_syms) |
0e389e77 | 927 | as_bad (_("symbol definition loop encountered at `%s'"), |
7c743825 | 928 | S_GET_NAME (symp)); |
252b5132 RH |
929 | final_val = 0; |
930 | resolved = 1; | |
931 | } | |
932 | else | |
933 | { | |
934 | symbolS *add_symbol, *op_symbol; | |
935 | offsetT left, right; | |
936 | segT seg_left, seg_right; | |
937 | operatorT op; | |
2d034539 | 938 | int move_seg_ok; |
252b5132 RH |
939 | |
940 | symp->sy_resolving = 1; | |
941 | ||
942 | /* Help out with CSE. */ | |
943 | add_symbol = symp->sy_value.X_add_symbol; | |
944 | op_symbol = symp->sy_value.X_op_symbol; | |
945 | final_val = symp->sy_value.X_add_number; | |
946 | op = symp->sy_value.X_op; | |
947 | ||
948 | switch (op) | |
949 | { | |
950 | default: | |
951 | BAD_CASE (op); | |
952 | break; | |
953 | ||
954 | case O_absent: | |
955 | final_val = 0; | |
956 | /* Fall through. */ | |
957 | ||
958 | case O_constant: | |
bea9907b | 959 | final_val += symp->sy_frag->fr_address / OCTETS_PER_BYTE; |
252b5132 RH |
960 | if (final_seg == expr_section) |
961 | final_seg = absolute_section; | |
962 | resolved = 1; | |
963 | break; | |
964 | ||
965 | case O_symbol: | |
966 | case O_symbol_rva: | |
6386f3a7 | 967 | left = resolve_symbol_value (add_symbol); |
e0890092 AM |
968 | seg_left = S_GET_SEGMENT (add_symbol); |
969 | if (finalize_syms) | |
970 | symp->sy_value.X_op_symbol = NULL; | |
252b5132 | 971 | |
e0890092 | 972 | do_symbol: |
252b5132 RH |
973 | if (symp->sy_mri_common) |
974 | { | |
975 | /* This is a symbol inside an MRI common section. The | |
e0890092 AM |
976 | relocation routines are going to handle it specially. |
977 | Don't change the value. */ | |
49309057 | 978 | resolved = symbol_resolved_p (add_symbol); |
252b5132 RH |
979 | break; |
980 | } | |
981 | ||
6386f3a7 | 982 | if (finalize_syms && final_val == 0) |
49309057 ILT |
983 | { |
984 | if (LOCAL_SYMBOL_CHECK (add_symbol)) | |
985 | add_symbol = local_symbol_convert ((struct local_symbol *) | |
986 | add_symbol); | |
987 | copy_symbol_attributes (symp, add_symbol); | |
988 | } | |
252b5132 | 989 | |
e0890092 AM |
990 | /* If we have equated this symbol to an undefined or common |
991 | symbol, keep X_op set to O_symbol, and don't change | |
992 | X_add_number. This permits the routine which writes out | |
993 | relocation to detect this case, and convert the | |
994 | relocation to be against the symbol to which this symbol | |
995 | is equated. */ | |
977cdf5a | 996 | if (! S_IS_DEFINED (add_symbol) |
7be1c489 | 997 | #if defined (OBJ_COFF) && defined (TE_PE) |
977cdf5a NC |
998 | || S_IS_WEAK (add_symbol) |
999 | #endif | |
1000 | || S_IS_COMMON (add_symbol)) | |
252b5132 | 1001 | { |
6386f3a7 | 1002 | if (finalize_syms) |
252b5132 | 1003 | { |
252b5132 RH |
1004 | symp->sy_value.X_op = O_symbol; |
1005 | symp->sy_value.X_add_symbol = add_symbol; | |
1006 | symp->sy_value.X_add_number = final_val; | |
e0890092 AM |
1007 | /* Use X_op_symbol as a flag. */ |
1008 | symp->sy_value.X_op_symbol = add_symbol; | |
1009 | final_seg = seg_left; | |
252b5132 RH |
1010 | } |
1011 | final_val = 0; | |
49309057 | 1012 | resolved = symbol_resolved_p (add_symbol); |
c89c8534 | 1013 | symp->sy_resolving = 0; |
252b5132 RH |
1014 | goto exit_dont_set_value; |
1015 | } | |
e0890092 AM |
1016 | else if (finalize_syms && final_seg == expr_section |
1017 | && seg_left != expr_section) | |
1018 | { | |
1019 | /* If the symbol is an expression symbol, do similarly | |
1020 | as for undefined and common syms above. Handles | |
1021 | "sym +/- expr" where "expr" cannot be evaluated | |
1022 | immediately, and we want relocations to be against | |
1023 | "sym", eg. because it is weak. */ | |
1024 | symp->sy_value.X_op = O_symbol; | |
1025 | symp->sy_value.X_add_symbol = add_symbol; | |
1026 | symp->sy_value.X_add_number = final_val; | |
1027 | symp->sy_value.X_op_symbol = add_symbol; | |
1028 | final_seg = seg_left; | |
1029 | final_val += symp->sy_frag->fr_address + left; | |
1030 | resolved = symbol_resolved_p (add_symbol); | |
1031 | symp->sy_resolving = 0; | |
1032 | goto exit_dont_set_value; | |
1033 | } | |
252b5132 RH |
1034 | else |
1035 | { | |
1036 | final_val += symp->sy_frag->fr_address + left; | |
1037 | if (final_seg == expr_section || final_seg == undefined_section) | |
e0890092 | 1038 | final_seg = seg_left; |
252b5132 RH |
1039 | } |
1040 | ||
49309057 | 1041 | resolved = symbol_resolved_p (add_symbol); |
252b5132 RH |
1042 | break; |
1043 | ||
1044 | case O_uminus: | |
1045 | case O_bit_not: | |
1046 | case O_logical_not: | |
6386f3a7 | 1047 | left = resolve_symbol_value (add_symbol); |
784b640d | 1048 | seg_left = S_GET_SEGMENT (add_symbol); |
252b5132 | 1049 | |
0909233e AM |
1050 | /* By reducing these to the relevant dyadic operator, we get |
1051 | !S -> S == 0 permitted on anything, | |
1052 | -S -> 0 - S only permitted on absolute | |
1053 | ~S -> S ^ ~0 only permitted on absolute */ | |
1054 | if (op != O_logical_not && seg_left != absolute_section | |
1055 | && finalize_syms) | |
1056 | report_op_error (symp, add_symbol, NULL); | |
1d3b2b27 | 1057 | |
0909233e AM |
1058 | if (final_seg == expr_section || final_seg == undefined_section) |
1059 | final_seg = absolute_section; | |
1d3b2b27 | 1060 | |
252b5132 RH |
1061 | if (op == O_uminus) |
1062 | left = -left; | |
1063 | else if (op == O_logical_not) | |
1064 | left = !left; | |
1065 | else | |
1066 | left = ~left; | |
1067 | ||
1068 | final_val += left + symp->sy_frag->fr_address; | |
252b5132 | 1069 | |
49309057 | 1070 | resolved = symbol_resolved_p (add_symbol); |
252b5132 RH |
1071 | break; |
1072 | ||
1073 | case O_multiply: | |
1074 | case O_divide: | |
1075 | case O_modulus: | |
1076 | case O_left_shift: | |
1077 | case O_right_shift: | |
1078 | case O_bit_inclusive_or: | |
1079 | case O_bit_or_not: | |
1080 | case O_bit_exclusive_or: | |
1081 | case O_bit_and: | |
1082 | case O_add: | |
1083 | case O_subtract: | |
1084 | case O_eq: | |
1085 | case O_ne: | |
1086 | case O_lt: | |
1087 | case O_le: | |
1088 | case O_ge: | |
1089 | case O_gt: | |
1090 | case O_logical_and: | |
1091 | case O_logical_or: | |
6386f3a7 AM |
1092 | left = resolve_symbol_value (add_symbol); |
1093 | right = resolve_symbol_value (op_symbol); | |
252b5132 RH |
1094 | seg_left = S_GET_SEGMENT (add_symbol); |
1095 | seg_right = S_GET_SEGMENT (op_symbol); | |
1096 | ||
1097 | /* Simplify addition or subtraction of a constant by folding the | |
1098 | constant into X_add_number. */ | |
e0890092 | 1099 | if (op == O_add) |
252b5132 RH |
1100 | { |
1101 | if (seg_right == absolute_section) | |
1102 | { | |
e0890092 | 1103 | final_val += right; |
252b5132 RH |
1104 | goto do_symbol; |
1105 | } | |
e0890092 | 1106 | else if (seg_left == absolute_section) |
252b5132 | 1107 | { |
252b5132 RH |
1108 | final_val += left; |
1109 | add_symbol = op_symbol; | |
1110 | left = right; | |
e0890092 AM |
1111 | seg_left = seg_right; |
1112 | goto do_symbol; | |
1113 | } | |
1114 | } | |
1115 | else if (op == O_subtract) | |
1116 | { | |
1117 | if (seg_right == absolute_section) | |
1118 | { | |
1119 | final_val -= right; | |
252b5132 RH |
1120 | goto do_symbol; |
1121 | } | |
1122 | } | |
1123 | ||
2d034539 | 1124 | move_seg_ok = 1; |
e0890092 AM |
1125 | /* Equality and non-equality tests are permitted on anything. |
1126 | Subtraction, and other comparison operators are permitted if | |
1127 | both operands are in the same section. Otherwise, both | |
1128 | operands must be absolute. We already handled the case of | |
1129 | addition or subtraction of a constant above. This will | |
1130 | probably need to be changed for an object file format which | |
2d034539 NC |
1131 | supports arbitrary expressions, such as IEEE-695. */ |
1132 | if (!(seg_left == absolute_section | |
0909233e AM |
1133 | && seg_right == absolute_section) |
1134 | && !(op == O_eq || op == O_ne) | |
1135 | && !((op == O_subtract | |
1136 | || op == O_lt || op == O_le || op == O_ge || op == O_gt) | |
1137 | && seg_left == seg_right | |
1138 | && (seg_left != undefined_section | |
1139 | || add_symbol == op_symbol))) | |
2d034539 NC |
1140 | { |
1141 | /* Don't emit messages unless we're finalizing the symbol value, | |
1142 | otherwise we may get the same message multiple times. */ | |
1143 | if (finalize_syms) | |
1144 | report_op_error (symp, add_symbol, op_symbol); | |
1145 | /* However do not move the symbol into the absolute section | |
1146 | if it cannot currently be resolved - this would confuse | |
1147 | other parts of the assembler into believing that the | |
1148 | expression had been evaluated to zero. */ | |
1149 | else | |
1150 | move_seg_ok = 0; | |
1151 | } | |
1d3b2b27 | 1152 | |
2d034539 NC |
1153 | if (move_seg_ok |
1154 | && (final_seg == expr_section || final_seg == undefined_section)) | |
0909233e | 1155 | final_seg = absolute_section; |
252b5132 RH |
1156 | |
1157 | /* Check for division by zero. */ | |
1158 | if ((op == O_divide || op == O_modulus) && right == 0) | |
1159 | { | |
1160 | /* If seg_right is not absolute_section, then we've | |
e0890092 | 1161 | already issued a warning about using a bad symbol. */ |
6386f3a7 | 1162 | if (seg_right == absolute_section && finalize_syms) |
252b5132 RH |
1163 | { |
1164 | char *file; | |
1165 | unsigned int line; | |
1166 | ||
1167 | if (expr_symbol_where (symp, &file, &line)) | |
1168 | as_bad_where (file, line, _("division by zero")); | |
1169 | else | |
0e389e77 | 1170 | as_bad (_("division by zero when setting `%s'"), |
252b5132 RH |
1171 | S_GET_NAME (symp)); |
1172 | } | |
1173 | ||
1174 | right = 1; | |
1175 | } | |
1176 | ||
1177 | switch (symp->sy_value.X_op) | |
1178 | { | |
1179 | case O_multiply: left *= right; break; | |
1180 | case O_divide: left /= right; break; | |
1181 | case O_modulus: left %= right; break; | |
1182 | case O_left_shift: left <<= right; break; | |
1183 | case O_right_shift: left >>= right; break; | |
1184 | case O_bit_inclusive_or: left |= right; break; | |
1185 | case O_bit_or_not: left |= ~right; break; | |
1186 | case O_bit_exclusive_or: left ^= right; break; | |
1187 | case O_bit_and: left &= right; break; | |
1188 | case O_add: left += right; break; | |
1189 | case O_subtract: left -= right; break; | |
e0890092 AM |
1190 | case O_eq: |
1191 | case O_ne: | |
1192 | left = (left == right && seg_left == seg_right | |
1193 | && (seg_left != undefined_section | |
1194 | || add_symbol == op_symbol) | |
1195 | ? ~ (offsetT) 0 : 0); | |
1196 | if (symp->sy_value.X_op == O_ne) | |
1197 | left = ~left; | |
1198 | break; | |
252b5132 RH |
1199 | case O_lt: left = left < right ? ~ (offsetT) 0 : 0; break; |
1200 | case O_le: left = left <= right ? ~ (offsetT) 0 : 0; break; | |
1201 | case O_ge: left = left >= right ? ~ (offsetT) 0 : 0; break; | |
1202 | case O_gt: left = left > right ? ~ (offsetT) 0 : 0; break; | |
1203 | case O_logical_and: left = left && right; break; | |
1204 | case O_logical_or: left = left || right; break; | |
1205 | default: abort (); | |
1206 | } | |
1207 | ||
1208 | final_val += symp->sy_frag->fr_address + left; | |
1209 | if (final_seg == expr_section || final_seg == undefined_section) | |
784b640d AM |
1210 | { |
1211 | if (seg_left == undefined_section | |
1212 | || seg_right == undefined_section) | |
1213 | final_seg = undefined_section; | |
1214 | else if (seg_left == absolute_section) | |
1215 | final_seg = seg_right; | |
1216 | else | |
1217 | final_seg = seg_left; | |
1218 | } | |
49309057 ILT |
1219 | resolved = (symbol_resolved_p (add_symbol) |
1220 | && symbol_resolved_p (op_symbol)); | |
7c743825 | 1221 | break; |
252b5132 RH |
1222 | |
1223 | case O_register: | |
1224 | case O_big: | |
1225 | case O_illegal: | |
1226 | /* Give an error (below) if not in expr_section. We don't | |
1227 | want to worry about expr_section symbols, because they | |
1228 | are fictional (they are created as part of expression | |
1229 | resolution), and any problems may not actually mean | |
1230 | anything. */ | |
1231 | break; | |
1232 | } | |
1233 | ||
1234 | symp->sy_resolving = 0; | |
1235 | } | |
1236 | ||
6386f3a7 | 1237 | if (finalize_syms) |
05bdb37e | 1238 | S_SET_VALUE (symp, final_val); |
252b5132 | 1239 | |
05bdb37e AM |
1240 | exit_dont_set_value: |
1241 | /* Always set the segment, even if not finalizing the value. | |
1242 | The segment is used to determine whether a symbol is defined. */ | |
05bdb37e | 1243 | S_SET_SEGMENT (symp, final_seg); |
252b5132 | 1244 | |
252b5132 | 1245 | /* Don't worry if we can't resolve an expr_section symbol. */ |
6386f3a7 | 1246 | if (finalize_syms) |
252b5132 RH |
1247 | { |
1248 | if (resolved) | |
1249 | symp->sy_resolved = 1; | |
1250 | else if (S_GET_SEGMENT (symp) != expr_section) | |
1251 | { | |
0e389e77 | 1252 | as_bad (_("can't resolve value for symbol `%s'"), |
7c743825 | 1253 | S_GET_NAME (symp)); |
252b5132 RH |
1254 | symp->sy_resolved = 1; |
1255 | } | |
1256 | } | |
1257 | ||
1258 | return final_val; | |
1259 | } | |
1260 | ||
74937d39 | 1261 | static void resolve_local_symbol (const char *, PTR); |
49309057 ILT |
1262 | |
1263 | /* A static function passed to hash_traverse. */ | |
1264 | ||
1265 | static void | |
74937d39 | 1266 | resolve_local_symbol (const char *key ATTRIBUTE_UNUSED, PTR value) |
49309057 ILT |
1267 | { |
1268 | if (value != NULL) | |
6386f3a7 | 1269 | resolve_symbol_value (value); |
49309057 ILT |
1270 | } |
1271 | ||
49309057 ILT |
1272 | /* Resolve all local symbols. */ |
1273 | ||
1274 | void | |
74937d39 | 1275 | resolve_local_symbol_values (void) |
49309057 | 1276 | { |
49309057 | 1277 | hash_traverse (local_hash, resolve_local_symbol); |
49309057 ILT |
1278 | } |
1279 | ||
9497f5ac NC |
1280 | /* Obtain the current value of a symbol without changing any |
1281 | sub-expressions used. */ | |
1282 | ||
1283 | int | |
1284 | snapshot_symbol (symbolS *symbolP, valueT *valueP, segT *segP, fragS **fragPP) | |
1285 | { | |
1286 | if (LOCAL_SYMBOL_CHECK (symbolP)) | |
1287 | { | |
1288 | struct local_symbol *locsym = (struct local_symbol *) symbolP; | |
1289 | ||
1290 | *valueP = locsym->lsy_value; | |
1291 | *segP = locsym->lsy_section; | |
1292 | *fragPP = local_symbol_get_frag (locsym); | |
1293 | } | |
1294 | else | |
1295 | { | |
1296 | expressionS expr = symbolP->sy_value; | |
1297 | ||
1298 | if (!symbolP->sy_resolved && expr.X_op != O_illegal) | |
1299 | { | |
1300 | int resolved; | |
1301 | ||
1302 | if (symbolP->sy_resolving) | |
1303 | return 0; | |
1304 | symbolP->sy_resolving = 1; | |
1305 | resolved = resolve_expression (&expr); | |
1306 | symbolP->sy_resolving = 0; | |
1307 | if (!resolved) | |
1308 | return 0; | |
1309 | ||
1310 | switch (expr.X_op) | |
1311 | { | |
1312 | case O_constant: | |
1313 | case O_register: | |
1314 | /* This check wouldn't be needed if pseudo_set() didn't set | |
1315 | symbols equated to bare symbols to undefined_section. */ | |
1316 | if (symbolP->bsym->section != undefined_section | |
1317 | || symbolP->sy_value.X_op != O_symbol) | |
1318 | break; | |
1319 | /* Fall thru. */ | |
1320 | case O_symbol: | |
1321 | case O_symbol_rva: | |
1322 | symbolP = expr.X_add_symbol; | |
1323 | break; | |
1324 | default: | |
1325 | return 0; | |
1326 | } | |
1327 | } | |
1328 | ||
1329 | *valueP = expr.X_add_number; | |
1330 | *segP = symbolP->bsym->section; | |
1331 | *fragPP = symbolP->sy_frag; | |
1332 | ||
1333 | if (*segP == expr_section) | |
1334 | switch (expr.X_op) | |
1335 | { | |
1336 | case O_constant: *segP = absolute_section; break; | |
1337 | case O_register: *segP = reg_section; break; | |
1338 | default: break; | |
1339 | } | |
1340 | } | |
1341 | ||
1342 | return 1; | |
1343 | } | |
1344 | ||
252b5132 RH |
1345 | /* Dollar labels look like a number followed by a dollar sign. Eg, "42$". |
1346 | They are *really* local. That is, they go out of scope whenever we see a | |
1347 | label that isn't local. Also, like fb labels, there can be multiple | |
1348 | instances of a dollar label. Therefor, we name encode each instance with | |
1349 | the instance number, keep a list of defined symbols separate from the real | |
1350 | symbol table, and we treat these buggers as a sparse array. */ | |
1351 | ||
1352 | static long *dollar_labels; | |
1353 | static long *dollar_label_instances; | |
1354 | static char *dollar_label_defines; | |
1355 | static unsigned long dollar_label_count; | |
1356 | static unsigned long dollar_label_max; | |
1357 | ||
7c743825 | 1358 | int |
74937d39 | 1359 | dollar_label_defined (long label) |
252b5132 RH |
1360 | { |
1361 | long *i; | |
1362 | ||
1363 | know ((dollar_labels != NULL) || (dollar_label_count == 0)); | |
1364 | ||
1365 | for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) | |
1366 | if (*i == label) | |
1367 | return dollar_label_defines[i - dollar_labels]; | |
1368 | ||
7c743825 | 1369 | /* If we get here, label isn't defined. */ |
252b5132 | 1370 | return 0; |
7c743825 | 1371 | } |
252b5132 RH |
1372 | |
1373 | static long | |
74937d39 | 1374 | dollar_label_instance (long label) |
252b5132 RH |
1375 | { |
1376 | long *i; | |
1377 | ||
1378 | know ((dollar_labels != NULL) || (dollar_label_count == 0)); | |
1379 | ||
1380 | for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) | |
1381 | if (*i == label) | |
1382 | return (dollar_label_instances[i - dollar_labels]); | |
1383 | ||
7c743825 KH |
1384 | /* If we get here, we haven't seen the label before. |
1385 | Therefore its instance count is zero. */ | |
252b5132 RH |
1386 | return 0; |
1387 | } | |
1388 | ||
7c743825 | 1389 | void |
74937d39 | 1390 | dollar_label_clear (void) |
252b5132 RH |
1391 | { |
1392 | memset (dollar_label_defines, '\0', (unsigned int) dollar_label_count); | |
1393 | } | |
1394 | ||
1395 | #define DOLLAR_LABEL_BUMP_BY 10 | |
1396 | ||
7c743825 | 1397 | void |
74937d39 | 1398 | define_dollar_label (long label) |
252b5132 RH |
1399 | { |
1400 | long *i; | |
1401 | ||
1402 | for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) | |
1403 | if (*i == label) | |
1404 | { | |
1405 | ++dollar_label_instances[i - dollar_labels]; | |
1406 | dollar_label_defines[i - dollar_labels] = 1; | |
1407 | return; | |
1408 | } | |
1409 | ||
7c743825 | 1410 | /* If we get to here, we don't have label listed yet. */ |
252b5132 RH |
1411 | |
1412 | if (dollar_labels == NULL) | |
1413 | { | |
1414 | dollar_labels = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long)); | |
1415 | dollar_label_instances = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long)); | |
1416 | dollar_label_defines = xmalloc (DOLLAR_LABEL_BUMP_BY); | |
1417 | dollar_label_max = DOLLAR_LABEL_BUMP_BY; | |
1418 | dollar_label_count = 0; | |
1419 | } | |
1420 | else if (dollar_label_count == dollar_label_max) | |
1421 | { | |
1422 | dollar_label_max += DOLLAR_LABEL_BUMP_BY; | |
1423 | dollar_labels = (long *) xrealloc ((char *) dollar_labels, | |
1424 | dollar_label_max * sizeof (long)); | |
1425 | dollar_label_instances = (long *) xrealloc ((char *) dollar_label_instances, | |
1426 | dollar_label_max * sizeof (long)); | |
1427 | dollar_label_defines = xrealloc (dollar_label_defines, dollar_label_max); | |
7c743825 | 1428 | } /* if we needed to grow */ |
252b5132 RH |
1429 | |
1430 | dollar_labels[dollar_label_count] = label; | |
1431 | dollar_label_instances[dollar_label_count] = 1; | |
1432 | dollar_label_defines[dollar_label_count] = 1; | |
1433 | ++dollar_label_count; | |
1434 | } | |
1435 | ||
7c743825 KH |
1436 | /* Caller must copy returned name: we re-use the area for the next name. |
1437 | ||
1438 | The mth occurence of label n: is turned into the symbol "Ln^Am" | |
1439 | where n is the label number and m is the instance number. "L" makes | |
1440 | it a label discarded unless debugging and "^A"('\1') ensures no | |
1441 | ordinary symbol SHOULD get the same name as a local label | |
1442 | symbol. The first "4:" is "L4^A1" - the m numbers begin at 1. | |
1443 | ||
1444 | fb labels get the same treatment, except that ^B is used in place | |
1445 | of ^A. */ | |
1446 | ||
1447 | char * /* Return local label name. */ | |
74937d39 KH |
1448 | dollar_label_name (register long n, /* we just saw "n$:" : n a number. */ |
1449 | register int augend /* 0 for current instance, 1 for new instance. */) | |
252b5132 RH |
1450 | { |
1451 | long i; | |
7c743825 | 1452 | /* Returned to caller, then copied. Used for created names ("4f"). */ |
252b5132 RH |
1453 | static char symbol_name_build[24]; |
1454 | register char *p; | |
1455 | register char *q; | |
7c743825 | 1456 | char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */ |
252b5132 RH |
1457 | |
1458 | know (n >= 0); | |
1459 | know (augend == 0 || augend == 1); | |
1460 | p = symbol_name_build; | |
f84dd1f0 NC |
1461 | #ifdef LOCAL_LABEL_PREFIX |
1462 | *p++ = LOCAL_LABEL_PREFIX; | |
1463 | #endif | |
252b5132 RH |
1464 | *p++ = 'L'; |
1465 | ||
7c743825 KH |
1466 | /* Next code just does sprintf( {}, "%d", n); */ |
1467 | /* Label number. */ | |
252b5132 RH |
1468 | q = symbol_name_temporary; |
1469 | for (*q++ = 0, i = n; i; ++q) | |
1470 | { | |
1471 | *q = i % 10 + '0'; | |
1472 | i /= 10; | |
1473 | } | |
1474 | while ((*p = *--q) != '\0') | |
1475 | ++p; | |
1476 | ||
aa257fcd | 1477 | *p++ = DOLLAR_LABEL_CHAR; /* ^A */ |
252b5132 | 1478 | |
7c743825 | 1479 | /* Instance number. */ |
252b5132 RH |
1480 | q = symbol_name_temporary; |
1481 | for (*q++ = 0, i = dollar_label_instance (n) + augend; i; ++q) | |
1482 | { | |
1483 | *q = i % 10 + '0'; | |
1484 | i /= 10; | |
1485 | } | |
1486 | while ((*p++ = *--q) != '\0');; | |
1487 | ||
7c743825 | 1488 | /* The label, as a '\0' ended string, starts at symbol_name_build. */ |
252b5132 RH |
1489 | return symbol_name_build; |
1490 | } | |
1491 | ||
47eebc20 | 1492 | /* Somebody else's idea of local labels. They are made by "n:" where n |
7c743825 KH |
1493 | is any decimal digit. Refer to them with |
1494 | "nb" for previous (backward) n: | |
1495 | or "nf" for next (forward) n:. | |
1496 | ||
1497 | We do a little better and let n be any number, not just a single digit, but | |
1498 | since the other guy's assembler only does ten, we treat the first ten | |
1499 | specially. | |
1500 | ||
1501 | Like someone else's assembler, we have one set of local label counters for | |
1502 | entire assembly, not one set per (sub)segment like in most assemblers. This | |
1503 | implies that one can refer to a label in another segment, and indeed some | |
1504 | crufty compilers have done just that. | |
1505 | ||
1506 | Since there could be a LOT of these things, treat them as a sparse | |
1507 | array. */ | |
252b5132 RH |
1508 | |
1509 | #define FB_LABEL_SPECIAL (10) | |
1510 | ||
1511 | static long fb_low_counter[FB_LABEL_SPECIAL]; | |
1512 | static long *fb_labels; | |
1513 | static long *fb_label_instances; | |
1514 | static long fb_label_count; | |
1515 | static long fb_label_max; | |
1516 | ||
7c743825 | 1517 | /* This must be more than FB_LABEL_SPECIAL. */ |
252b5132 RH |
1518 | #define FB_LABEL_BUMP_BY (FB_LABEL_SPECIAL + 6) |
1519 | ||
7c743825 | 1520 | static void |
74937d39 | 1521 | fb_label_init (void) |
252b5132 RH |
1522 | { |
1523 | memset ((void *) fb_low_counter, '\0', sizeof (fb_low_counter)); | |
7c743825 | 1524 | } |
252b5132 | 1525 | |
7c743825 KH |
1526 | /* Add one to the instance number of this fb label. */ |
1527 | ||
1528 | void | |
74937d39 | 1529 | fb_label_instance_inc (long label) |
252b5132 RH |
1530 | { |
1531 | long *i; | |
1532 | ||
1533 | if (label < FB_LABEL_SPECIAL) | |
1534 | { | |
1535 | ++fb_low_counter[label]; | |
1536 | return; | |
1537 | } | |
1538 | ||
1539 | if (fb_labels != NULL) | |
1540 | { | |
1541 | for (i = fb_labels + FB_LABEL_SPECIAL; | |
1542 | i < fb_labels + fb_label_count; ++i) | |
1543 | { | |
1544 | if (*i == label) | |
1545 | { | |
1546 | ++fb_label_instances[i - fb_labels]; | |
1547 | return; | |
7c743825 KH |
1548 | } /* if we find it */ |
1549 | } /* for each existing label */ | |
252b5132 RH |
1550 | } |
1551 | ||
7c743825 | 1552 | /* If we get to here, we don't have label listed yet. */ |
252b5132 RH |
1553 | |
1554 | if (fb_labels == NULL) | |
1555 | { | |
1556 | fb_labels = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long)); | |
1557 | fb_label_instances = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long)); | |
1558 | fb_label_max = FB_LABEL_BUMP_BY; | |
1559 | fb_label_count = FB_LABEL_SPECIAL; | |
1560 | ||
1561 | } | |
1562 | else if (fb_label_count == fb_label_max) | |
1563 | { | |
1564 | fb_label_max += FB_LABEL_BUMP_BY; | |
1565 | fb_labels = (long *) xrealloc ((char *) fb_labels, | |
1566 | fb_label_max * sizeof (long)); | |
1567 | fb_label_instances = (long *) xrealloc ((char *) fb_label_instances, | |
1568 | fb_label_max * sizeof (long)); | |
7c743825 | 1569 | } /* if we needed to grow */ |
252b5132 RH |
1570 | |
1571 | fb_labels[fb_label_count] = label; | |
1572 | fb_label_instances[fb_label_count] = 1; | |
1573 | ++fb_label_count; | |
1574 | } | |
1575 | ||
7c743825 | 1576 | static long |
74937d39 | 1577 | fb_label_instance (long label) |
252b5132 RH |
1578 | { |
1579 | long *i; | |
1580 | ||
1581 | if (label < FB_LABEL_SPECIAL) | |
1582 | { | |
1583 | return (fb_low_counter[label]); | |
1584 | } | |
1585 | ||
1586 | if (fb_labels != NULL) | |
1587 | { | |
1588 | for (i = fb_labels + FB_LABEL_SPECIAL; | |
1589 | i < fb_labels + fb_label_count; ++i) | |
1590 | { | |
1591 | if (*i == label) | |
1592 | { | |
1593 | return (fb_label_instances[i - fb_labels]); | |
7c743825 KH |
1594 | } /* if we find it */ |
1595 | } /* for each existing label */ | |
252b5132 RH |
1596 | } |
1597 | ||
1598 | /* We didn't find the label, so this must be a reference to the | |
1599 | first instance. */ | |
1600 | return 0; | |
1601 | } | |
1602 | ||
7c743825 KH |
1603 | /* Caller must copy returned name: we re-use the area for the next name. |
1604 | ||
1605 | The mth occurence of label n: is turned into the symbol "Ln^Bm" | |
1606 | where n is the label number and m is the instance number. "L" makes | |
1607 | it a label discarded unless debugging and "^B"('\2') ensures no | |
1608 | ordinary symbol SHOULD get the same name as a local label | |
1609 | symbol. The first "4:" is "L4^B1" - the m numbers begin at 1. | |
1610 | ||
1611 | dollar labels get the same treatment, except that ^A is used in | |
1612 | place of ^B. */ | |
1613 | ||
1614 | char * /* Return local label name. */ | |
74937d39 KH |
1615 | fb_label_name (long n, /* We just saw "n:", "nf" or "nb" : n a number. */ |
1616 | long augend /* 0 for nb, 1 for n:, nf. */) | |
252b5132 RH |
1617 | { |
1618 | long i; | |
7c743825 | 1619 | /* Returned to caller, then copied. Used for created names ("4f"). */ |
252b5132 RH |
1620 | static char symbol_name_build[24]; |
1621 | register char *p; | |
1622 | register char *q; | |
7c743825 | 1623 | char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */ |
252b5132 RH |
1624 | |
1625 | know (n >= 0); | |
a76903bf | 1626 | #ifdef TC_MMIX |
71ba24a1 | 1627 | know ((unsigned long) augend <= 2 /* See mmix_fb_label. */); |
a76903bf | 1628 | #else |
71ba24a1 | 1629 | know ((unsigned long) augend <= 1); |
a76903bf | 1630 | #endif |
252b5132 | 1631 | p = symbol_name_build; |
aa257fcd NC |
1632 | #ifdef LOCAL_LABEL_PREFIX |
1633 | *p++ = LOCAL_LABEL_PREFIX; | |
1634 | #endif | |
252b5132 RH |
1635 | *p++ = 'L'; |
1636 | ||
7c743825 KH |
1637 | /* Next code just does sprintf( {}, "%d", n); */ |
1638 | /* Label number. */ | |
252b5132 RH |
1639 | q = symbol_name_temporary; |
1640 | for (*q++ = 0, i = n; i; ++q) | |
1641 | { | |
1642 | *q = i % 10 + '0'; | |
1643 | i /= 10; | |
1644 | } | |
1645 | while ((*p = *--q) != '\0') | |
1646 | ++p; | |
1647 | ||
aa257fcd | 1648 | *p++ = LOCAL_LABEL_CHAR; /* ^B */ |
252b5132 | 1649 | |
7c743825 | 1650 | /* Instance number. */ |
252b5132 RH |
1651 | q = symbol_name_temporary; |
1652 | for (*q++ = 0, i = fb_label_instance (n) + augend; i; ++q) | |
1653 | { | |
1654 | *q = i % 10 + '0'; | |
1655 | i /= 10; | |
1656 | } | |
1657 | while ((*p++ = *--q) != '\0');; | |
1658 | ||
7c743825 | 1659 | /* The label, as a '\0' ended string, starts at symbol_name_build. */ |
252b5132 | 1660 | return (symbol_name_build); |
7c743825 | 1661 | } |
252b5132 | 1662 | |
7c743825 KH |
1663 | /* Decode name that may have been generated by foo_label_name() above. |
1664 | If the name wasn't generated by foo_label_name(), then return it | |
1665 | unaltered. This is used for error messages. */ | |
252b5132 RH |
1666 | |
1667 | char * | |
74937d39 | 1668 | decode_local_label_name (char *s) |
252b5132 RH |
1669 | { |
1670 | char *p; | |
1671 | char *symbol_decode; | |
1672 | int label_number; | |
1673 | int instance_number; | |
1674 | char *type; | |
d95767bf | 1675 | const char *message_format; |
aa257fcd | 1676 | int index = 0; |
43ad3147 | 1677 | |
aa257fcd NC |
1678 | #ifdef LOCAL_LABEL_PREFIX |
1679 | if (s[index] == LOCAL_LABEL_PREFIX) | |
1680 | ++index; | |
1681 | #endif | |
43ad3147 | 1682 | |
aa257fcd | 1683 | if (s[index] != 'L') |
252b5132 RH |
1684 | return s; |
1685 | ||
3882b010 | 1686 | for (label_number = 0, p = s + index + 1; ISDIGIT (*p); ++p) |
252b5132 RH |
1687 | label_number = (10 * label_number) + *p - '0'; |
1688 | ||
aa257fcd | 1689 | if (*p == DOLLAR_LABEL_CHAR) |
252b5132 | 1690 | type = "dollar"; |
aa257fcd | 1691 | else if (*p == LOCAL_LABEL_CHAR) |
252b5132 RH |
1692 | type = "fb"; |
1693 | else | |
1694 | return s; | |
1695 | ||
3882b010 | 1696 | for (instance_number = 0, p++; ISDIGIT (*p); ++p) |
252b5132 RH |
1697 | instance_number = (10 * instance_number) + *p - '0'; |
1698 | ||
d95767bf | 1699 | message_format = _("\"%d\" (instance number %d of a %s label)"); |
252b5132 RH |
1700 | symbol_decode = obstack_alloc (¬es, strlen (message_format) + 30); |
1701 | sprintf (symbol_decode, message_format, label_number, instance_number, type); | |
1702 | ||
1703 | return symbol_decode; | |
1704 | } | |
1705 | ||
1706 | /* Get the value of a symbol. */ | |
1707 | ||
1708 | valueT | |
74937d39 | 1709 | S_GET_VALUE (symbolS *s) |
252b5132 | 1710 | { |
49309057 | 1711 | if (LOCAL_SYMBOL_CHECK (s)) |
ac62c346 | 1712 | return resolve_symbol_value (s); |
49309057 | 1713 | |
ac62c346 | 1714 | if (!s->sy_resolved) |
e46d99eb | 1715 | { |
6386f3a7 AM |
1716 | valueT val = resolve_symbol_value (s); |
1717 | if (!finalize_syms) | |
e46d99eb AM |
1718 | return val; |
1719 | } | |
252b5132 RH |
1720 | if (s->sy_value.X_op != O_constant) |
1721 | { | |
1722 | static symbolS *recur; | |
1723 | ||
1724 | /* FIXME: In non BFD assemblers, S_IS_DEFINED and S_IS_COMMON | |
1d3b2b27 AM |
1725 | may call S_GET_VALUE. We use a static symbol to avoid the |
1726 | immediate recursion. */ | |
252b5132 RH |
1727 | if (recur == s) |
1728 | return (valueT) s->sy_value.X_add_number; | |
1729 | recur = s; | |
1730 | if (! s->sy_resolved | |
1731 | || s->sy_value.X_op != O_symbol | |
1732 | || (S_IS_DEFINED (s) && ! S_IS_COMMON (s))) | |
0e389e77 | 1733 | as_bad (_("attempt to get value of unresolved symbol `%s'"), |
252b5132 RH |
1734 | S_GET_NAME (s)); |
1735 | recur = NULL; | |
1736 | } | |
1737 | return (valueT) s->sy_value.X_add_number; | |
1738 | } | |
1739 | ||
1740 | /* Set the value of a symbol. */ | |
1741 | ||
1742 | void | |
74937d39 | 1743 | S_SET_VALUE (symbolS *s, valueT val) |
252b5132 | 1744 | { |
49309057 ILT |
1745 | if (LOCAL_SYMBOL_CHECK (s)) |
1746 | { | |
bd780143 | 1747 | ((struct local_symbol *) s)->lsy_value = val; |
49309057 ILT |
1748 | return; |
1749 | } | |
1750 | ||
252b5132 RH |
1751 | s->sy_value.X_op = O_constant; |
1752 | s->sy_value.X_add_number = (offsetT) val; | |
1753 | s->sy_value.X_unsigned = 0; | |
1754 | } | |
1755 | ||
1756 | void | |
74937d39 | 1757 | copy_symbol_attributes (symbolS *dest, symbolS *src) |
252b5132 | 1758 | { |
49309057 | 1759 | if (LOCAL_SYMBOL_CHECK (dest)) |
7f2f689c | 1760 | dest = local_symbol_convert ((struct local_symbol *) dest); |
49309057 | 1761 | if (LOCAL_SYMBOL_CHECK (src)) |
7f2f689c | 1762 | src = local_symbol_convert ((struct local_symbol *) src); |
49309057 | 1763 | |
252b5132 RH |
1764 | /* In an expression, transfer the settings of these flags. |
1765 | The user can override later, of course. */ | |
1766 | #define COPIED_SYMFLAGS (BSF_FUNCTION | BSF_OBJECT) | |
1767 | dest->bsym->flags |= src->bsym->flags & COPIED_SYMFLAGS; | |
252b5132 RH |
1768 | |
1769 | #ifdef OBJ_COPY_SYMBOL_ATTRIBUTES | |
1770 | OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src); | |
1771 | #endif | |
1772 | } | |
1773 | ||
252b5132 | 1774 | int |
74937d39 | 1775 | S_IS_FUNCTION (symbolS *s) |
252b5132 | 1776 | { |
49309057 ILT |
1777 | flagword flags; |
1778 | ||
1779 | if (LOCAL_SYMBOL_CHECK (s)) | |
1780 | return 0; | |
1781 | ||
1782 | flags = s->bsym->flags; | |
252b5132 RH |
1783 | |
1784 | return (flags & BSF_FUNCTION) != 0; | |
1785 | } | |
1786 | ||
1787 | int | |
74937d39 | 1788 | S_IS_EXTERNAL (symbolS *s) |
252b5132 | 1789 | { |
49309057 ILT |
1790 | flagword flags; |
1791 | ||
1792 | if (LOCAL_SYMBOL_CHECK (s)) | |
1793 | return 0; | |
1794 | ||
1795 | flags = s->bsym->flags; | |
252b5132 | 1796 | |
7c743825 | 1797 | /* Sanity check. */ |
252b5132 RH |
1798 | if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL)) |
1799 | abort (); | |
1800 | ||
1801 | return (flags & BSF_GLOBAL) != 0; | |
1802 | } | |
1803 | ||
1804 | int | |
74937d39 | 1805 | S_IS_WEAK (symbolS *s) |
252b5132 | 1806 | { |
49309057 ILT |
1807 | if (LOCAL_SYMBOL_CHECK (s)) |
1808 | return 0; | |
252b5132 RH |
1809 | return (s->bsym->flags & BSF_WEAK) != 0; |
1810 | } | |
1811 | ||
1812 | int | |
74937d39 | 1813 | S_IS_COMMON (symbolS *s) |
252b5132 | 1814 | { |
49309057 ILT |
1815 | if (LOCAL_SYMBOL_CHECK (s)) |
1816 | return 0; | |
252b5132 RH |
1817 | return bfd_is_com_section (s->bsym->section); |
1818 | } | |
1819 | ||
1820 | int | |
74937d39 | 1821 | S_IS_DEFINED (symbolS *s) |
252b5132 | 1822 | { |
49309057 ILT |
1823 | if (LOCAL_SYMBOL_CHECK (s)) |
1824 | return ((struct local_symbol *) s)->lsy_section != undefined_section; | |
252b5132 RH |
1825 | return s->bsym->section != undefined_section; |
1826 | } | |
1827 | ||
a161fe53 AM |
1828 | |
1829 | #ifndef EXTERN_FORCE_RELOC | |
1830 | #define EXTERN_FORCE_RELOC IS_ELF | |
1831 | #endif | |
1832 | ||
1833 | /* Return true for symbols that should not be reduced to section | |
1834 | symbols or eliminated from expressions, because they may be | |
1835 | overridden by the linker. */ | |
1836 | int | |
74937d39 | 1837 | S_FORCE_RELOC (symbolS *s, int strict) |
a161fe53 AM |
1838 | { |
1839 | if (LOCAL_SYMBOL_CHECK (s)) | |
1840 | return ((struct local_symbol *) s)->lsy_section == undefined_section; | |
1841 | ||
ae6063d4 AM |
1842 | return ((strict |
1843 | && ((s->bsym->flags & BSF_WEAK) != 0 | |
1844 | || (EXTERN_FORCE_RELOC | |
1845 | && (s->bsym->flags & BSF_GLOBAL) != 0))) | |
a161fe53 AM |
1846 | || s->bsym->section == undefined_section |
1847 | || bfd_is_com_section (s->bsym->section)); | |
1848 | } | |
1849 | ||
252b5132 | 1850 | int |
74937d39 | 1851 | S_IS_DEBUG (symbolS *s) |
252b5132 | 1852 | { |
49309057 ILT |
1853 | if (LOCAL_SYMBOL_CHECK (s)) |
1854 | return 0; | |
252b5132 RH |
1855 | if (s->bsym->flags & BSF_DEBUGGING) |
1856 | return 1; | |
1857 | return 0; | |
1858 | } | |
1859 | ||
1860 | int | |
74937d39 | 1861 | S_IS_LOCAL (symbolS *s) |
252b5132 | 1862 | { |
49309057 | 1863 | flagword flags; |
252b5132 RH |
1864 | const char *name; |
1865 | ||
49309057 ILT |
1866 | if (LOCAL_SYMBOL_CHECK (s)) |
1867 | return 1; | |
1868 | ||
1869 | flags = s->bsym->flags; | |
1870 | ||
7c743825 | 1871 | /* Sanity check. */ |
252b5132 RH |
1872 | if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL)) |
1873 | abort (); | |
1874 | ||
1875 | if (bfd_get_section (s->bsym) == reg_section) | |
1876 | return 1; | |
1877 | ||
1878 | if (flag_strip_local_absolute | |
bb82af9f NC |
1879 | /* Keep BSF_FILE symbols in order to allow debuggers to identify |
1880 | the source file even when the object file is stripped. */ | |
1881 | && (flags & (BSF_GLOBAL | BSF_FILE)) == 0 | |
252b5132 RH |
1882 | && bfd_get_section (s->bsym) == absolute_section) |
1883 | return 1; | |
1884 | ||
1885 | name = S_GET_NAME (s); | |
1886 | return (name != NULL | |
1887 | && ! S_IS_DEBUG (s) | |
aa257fcd NC |
1888 | && (strchr (name, DOLLAR_LABEL_CHAR) |
1889 | || strchr (name, LOCAL_LABEL_CHAR) | |
252b5132 RH |
1890 | || (! flag_keep_locals |
1891 | && (bfd_is_local_label (stdoutput, s->bsym) | |
1892 | || (flag_mri | |
1893 | && name[0] == '?' | |
1894 | && name[1] == '?'))))); | |
1895 | } | |
1896 | ||
252b5132 | 1897 | int |
74937d39 | 1898 | S_IS_STABD (symbolS *s) |
252b5132 RH |
1899 | { |
1900 | return S_GET_NAME (s) == 0; | |
1901 | } | |
1902 | ||
9497f5ac NC |
1903 | int |
1904 | S_IS_VOLATILE (const symbolS *s) | |
1905 | { | |
1906 | if (LOCAL_SYMBOL_CHECK (s)) | |
1907 | return 0; | |
1908 | return s->sy_volatile; | |
1909 | } | |
1910 | ||
1911 | int | |
1912 | S_IS_FORWARD_REF (const symbolS *s) | |
1913 | { | |
1914 | if (LOCAL_SYMBOL_CHECK (s)) | |
1915 | return 0; | |
1916 | return s->sy_forward_ref; | |
1917 | } | |
1918 | ||
9758f3fc | 1919 | const char * |
74937d39 | 1920 | S_GET_NAME (symbolS *s) |
252b5132 | 1921 | { |
49309057 ILT |
1922 | if (LOCAL_SYMBOL_CHECK (s)) |
1923 | return ((struct local_symbol *) s)->lsy_name; | |
252b5132 RH |
1924 | return s->bsym->name; |
1925 | } | |
1926 | ||
1927 | segT | |
74937d39 | 1928 | S_GET_SEGMENT (symbolS *s) |
252b5132 | 1929 | { |
49309057 ILT |
1930 | if (LOCAL_SYMBOL_CHECK (s)) |
1931 | return ((struct local_symbol *) s)->lsy_section; | |
252b5132 RH |
1932 | return s->bsym->section; |
1933 | } | |
1934 | ||
1935 | void | |
74937d39 | 1936 | S_SET_SEGMENT (symbolS *s, segT seg) |
252b5132 RH |
1937 | { |
1938 | /* Don't reassign section symbols. The direct reason is to prevent seg | |
1939 | faults assigning back to const global symbols such as *ABS*, but it | |
1940 | shouldn't happen anyway. */ | |
1941 | ||
49309057 ILT |
1942 | if (LOCAL_SYMBOL_CHECK (s)) |
1943 | { | |
1944 | if (seg == reg_section) | |
1945 | s = local_symbol_convert ((struct local_symbol *) s); | |
1946 | else | |
1947 | { | |
1948 | ((struct local_symbol *) s)->lsy_section = seg; | |
1949 | return; | |
1950 | } | |
1951 | } | |
1952 | ||
252b5132 RH |
1953 | if (s->bsym->flags & BSF_SECTION_SYM) |
1954 | { | |
1955 | if (s->bsym->section != seg) | |
7c743825 | 1956 | abort (); |
252b5132 RH |
1957 | } |
1958 | else | |
1959 | s->bsym->section = seg; | |
1960 | } | |
1961 | ||
1962 | void | |
74937d39 | 1963 | S_SET_EXTERNAL (symbolS *s) |
252b5132 | 1964 | { |
49309057 ILT |
1965 | if (LOCAL_SYMBOL_CHECK (s)) |
1966 | s = local_symbol_convert ((struct local_symbol *) s); | |
252b5132 RH |
1967 | if ((s->bsym->flags & BSF_WEAK) != 0) |
1968 | { | |
1969 | /* Let .weak override .global. */ | |
1970 | return; | |
1971 | } | |
4d7c34bf NC |
1972 | if (s->bsym->flags & BSF_SECTION_SYM) |
1973 | { | |
1974 | char * file; | |
1975 | unsigned int line; | |
d1a6c242 | 1976 | |
4d7c34bf NC |
1977 | /* Do not reassign section symbols. */ |
1978 | as_where (& file, & line); | |
1979 | as_warn_where (file, line, | |
0e389e77 | 1980 | _("section symbols are already global")); |
4d7c34bf NC |
1981 | return; |
1982 | } | |
252b5132 | 1983 | s->bsym->flags |= BSF_GLOBAL; |
7c743825 | 1984 | s->bsym->flags &= ~(BSF_LOCAL | BSF_WEAK); |
977cdf5a NC |
1985 | |
1986 | #ifdef USE_UNIQUE | |
1987 | if (! an_external_name && S_GET_NAME(s)[0] != '.') | |
1988 | an_external_name = S_GET_NAME (s); | |
1989 | #endif | |
252b5132 RH |
1990 | } |
1991 | ||
1992 | void | |
74937d39 | 1993 | S_CLEAR_EXTERNAL (symbolS *s) |
252b5132 | 1994 | { |
49309057 ILT |
1995 | if (LOCAL_SYMBOL_CHECK (s)) |
1996 | return; | |
252b5132 RH |
1997 | if ((s->bsym->flags & BSF_WEAK) != 0) |
1998 | { | |
1999 | /* Let .weak override. */ | |
2000 | return; | |
2001 | } | |
2002 | s->bsym->flags |= BSF_LOCAL; | |
7c743825 | 2003 | s->bsym->flags &= ~(BSF_GLOBAL | BSF_WEAK); |
252b5132 RH |
2004 | } |
2005 | ||
2006 | void | |
74937d39 | 2007 | S_SET_WEAK (symbolS *s) |
252b5132 | 2008 | { |
49309057 ILT |
2009 | if (LOCAL_SYMBOL_CHECK (s)) |
2010 | s = local_symbol_convert ((struct local_symbol *) s); | |
252b5132 | 2011 | s->bsym->flags |= BSF_WEAK; |
7c743825 | 2012 | s->bsym->flags &= ~(BSF_GLOBAL | BSF_LOCAL); |
252b5132 RH |
2013 | } |
2014 | ||
00f7efb6 | 2015 | void |
74937d39 | 2016 | S_SET_THREAD_LOCAL (symbolS *s) |
00f7efb6 JJ |
2017 | { |
2018 | if (LOCAL_SYMBOL_CHECK (s)) | |
2019 | s = local_symbol_convert ((struct local_symbol *) s); | |
2020 | if (bfd_is_com_section (s->bsym->section) | |
2021 | && (s->bsym->flags & BSF_THREAD_LOCAL) != 0) | |
2022 | return; | |
2023 | s->bsym->flags |= BSF_THREAD_LOCAL; | |
2024 | if ((s->bsym->flags & BSF_FUNCTION) != 0) | |
2025 | as_bad (_("Accessing function `%s' as thread-local object"), | |
2026 | S_GET_NAME (s)); | |
2027 | else if (! bfd_is_und_section (s->bsym->section) | |
2028 | && (s->bsym->section->flags & SEC_THREAD_LOCAL) == 0) | |
2029 | as_bad (_("Accessing `%s' as thread-local object"), | |
2030 | S_GET_NAME (s)); | |
2031 | } | |
2032 | ||
252b5132 | 2033 | void |
977cdf5a | 2034 | S_SET_NAME (symbolS *s, const char *name) |
252b5132 | 2035 | { |
49309057 ILT |
2036 | if (LOCAL_SYMBOL_CHECK (s)) |
2037 | { | |
2038 | ((struct local_symbol *) s)->lsy_name = name; | |
2039 | return; | |
2040 | } | |
252b5132 RH |
2041 | s->bsym->name = name; |
2042 | } | |
49309057 | 2043 | |
9497f5ac NC |
2044 | void |
2045 | S_SET_VOLATILE (symbolS *s) | |
2046 | { | |
2047 | if (LOCAL_SYMBOL_CHECK (s)) | |
2048 | s = local_symbol_convert ((struct local_symbol *) s); | |
2049 | s->sy_volatile = 1; | |
2050 | } | |
2051 | ||
2052 | void | |
2053 | S_SET_FORWARD_REF (symbolS *s) | |
2054 | { | |
2055 | if (LOCAL_SYMBOL_CHECK (s)) | |
2056 | s = local_symbol_convert ((struct local_symbol *) s); | |
2057 | s->sy_forward_ref = 1; | |
2058 | } | |
2059 | ||
49309057 ILT |
2060 | /* Return the previous symbol in a chain. */ |
2061 | ||
2062 | symbolS * | |
74937d39 | 2063 | symbol_previous (symbolS *s) |
49309057 ILT |
2064 | { |
2065 | if (LOCAL_SYMBOL_CHECK (s)) | |
2066 | abort (); | |
2067 | return s->sy_previous; | |
2068 | } | |
2069 | ||
49309057 ILT |
2070 | /* Return the next symbol in a chain. */ |
2071 | ||
2072 | symbolS * | |
74937d39 | 2073 | symbol_next (symbolS *s) |
49309057 ILT |
2074 | { |
2075 | if (LOCAL_SYMBOL_CHECK (s)) | |
2076 | abort (); | |
2077 | return s->sy_next; | |
2078 | } | |
2079 | ||
2080 | /* Return a pointer to the value of a symbol as an expression. */ | |
2081 | ||
2082 | expressionS * | |
74937d39 | 2083 | symbol_get_value_expression (symbolS *s) |
49309057 ILT |
2084 | { |
2085 | if (LOCAL_SYMBOL_CHECK (s)) | |
2086 | s = local_symbol_convert ((struct local_symbol *) s); | |
2087 | return &s->sy_value; | |
2088 | } | |
2089 | ||
2090 | /* Set the value of a symbol to an expression. */ | |
2091 | ||
2092 | void | |
74937d39 | 2093 | symbol_set_value_expression (symbolS *s, const expressionS *exp) |
49309057 ILT |
2094 | { |
2095 | if (LOCAL_SYMBOL_CHECK (s)) | |
2096 | s = local_symbol_convert ((struct local_symbol *) s); | |
2097 | s->sy_value = *exp; | |
2098 | } | |
2099 | ||
be95a9c1 AM |
2100 | /* Return a pointer to the X_add_number component of a symbol. */ |
2101 | ||
514d955d | 2102 | offsetT * |
be95a9c1 AM |
2103 | symbol_X_add_number (symbolS *s) |
2104 | { | |
be95a9c1 | 2105 | if (LOCAL_SYMBOL_CHECK (s)) |
514d955d | 2106 | return (offsetT *) &((struct local_symbol *) s)->lsy_value; |
be95a9c1 | 2107 | |
514d955d | 2108 | return &s->sy_value.X_add_number; |
be95a9c1 AM |
2109 | } |
2110 | ||
b7d6ed97 RH |
2111 | /* Set the value of SYM to the current position in the current segment. */ |
2112 | ||
2113 | void | |
74937d39 | 2114 | symbol_set_value_now (symbolS *sym) |
b7d6ed97 RH |
2115 | { |
2116 | S_SET_SEGMENT (sym, now_seg); | |
2117 | S_SET_VALUE (sym, frag_now_fix ()); | |
2118 | symbol_set_frag (sym, frag_now); | |
2119 | } | |
2120 | ||
49309057 ILT |
2121 | /* Set the frag of a symbol. */ |
2122 | ||
2123 | void | |
74937d39 | 2124 | symbol_set_frag (symbolS *s, fragS *f) |
49309057 ILT |
2125 | { |
2126 | if (LOCAL_SYMBOL_CHECK (s)) | |
2127 | { | |
2128 | local_symbol_set_frag ((struct local_symbol *) s, f); | |
2129 | return; | |
2130 | } | |
2131 | s->sy_frag = f; | |
2132 | } | |
2133 | ||
2134 | /* Return the frag of a symbol. */ | |
2135 | ||
2136 | fragS * | |
74937d39 | 2137 | symbol_get_frag (symbolS *s) |
49309057 ILT |
2138 | { |
2139 | if (LOCAL_SYMBOL_CHECK (s)) | |
2140 | return local_symbol_get_frag ((struct local_symbol *) s); | |
2141 | return s->sy_frag; | |
2142 | } | |
2143 | ||
2144 | /* Mark a symbol as having been used. */ | |
2145 | ||
2146 | void | |
74937d39 | 2147 | symbol_mark_used (symbolS *s) |
49309057 ILT |
2148 | { |
2149 | if (LOCAL_SYMBOL_CHECK (s)) | |
2150 | return; | |
2151 | s->sy_used = 1; | |
2152 | } | |
2153 | ||
2154 | /* Clear the mark of whether a symbol has been used. */ | |
2155 | ||
2156 | void | |
74937d39 | 2157 | symbol_clear_used (symbolS *s) |
49309057 ILT |
2158 | { |
2159 | if (LOCAL_SYMBOL_CHECK (s)) | |
2160 | s = local_symbol_convert ((struct local_symbol *) s); | |
2161 | s->sy_used = 0; | |
2162 | } | |
2163 | ||
2164 | /* Return whether a symbol has been used. */ | |
2165 | ||
2166 | int | |
74937d39 | 2167 | symbol_used_p (symbolS *s) |
49309057 ILT |
2168 | { |
2169 | if (LOCAL_SYMBOL_CHECK (s)) | |
2170 | return 1; | |
2171 | return s->sy_used; | |
2172 | } | |
2173 | ||
2174 | /* Mark a symbol as having been used in a reloc. */ | |
2175 | ||
2176 | void | |
74937d39 | 2177 | symbol_mark_used_in_reloc (symbolS *s) |
49309057 ILT |
2178 | { |
2179 | if (LOCAL_SYMBOL_CHECK (s)) | |
2180 | s = local_symbol_convert ((struct local_symbol *) s); | |
2181 | s->sy_used_in_reloc = 1; | |
2182 | } | |
2183 | ||
2184 | /* Clear the mark of whether a symbol has been used in a reloc. */ | |
2185 | ||
2186 | void | |
74937d39 | 2187 | symbol_clear_used_in_reloc (symbolS *s) |
49309057 ILT |
2188 | { |
2189 | if (LOCAL_SYMBOL_CHECK (s)) | |
2190 | return; | |
2191 | s->sy_used_in_reloc = 0; | |
2192 | } | |
2193 | ||
2194 | /* Return whether a symbol has been used in a reloc. */ | |
2195 | ||
2196 | int | |
74937d39 | 2197 | symbol_used_in_reloc_p (symbolS *s) |
49309057 ILT |
2198 | { |
2199 | if (LOCAL_SYMBOL_CHECK (s)) | |
2200 | return 0; | |
2201 | return s->sy_used_in_reloc; | |
2202 | } | |
2203 | ||
2204 | /* Mark a symbol as an MRI common symbol. */ | |
2205 | ||
2206 | void | |
74937d39 | 2207 | symbol_mark_mri_common (symbolS *s) |
49309057 ILT |
2208 | { |
2209 | if (LOCAL_SYMBOL_CHECK (s)) | |
2210 | s = local_symbol_convert ((struct local_symbol *) s); | |
2211 | s->sy_mri_common = 1; | |
2212 | } | |
2213 | ||
2214 | /* Clear the mark of whether a symbol is an MRI common symbol. */ | |
2215 | ||
2216 | void | |
74937d39 | 2217 | symbol_clear_mri_common (symbolS *s) |
49309057 ILT |
2218 | { |
2219 | if (LOCAL_SYMBOL_CHECK (s)) | |
2220 | return; | |
2221 | s->sy_mri_common = 0; | |
2222 | } | |
2223 | ||
2224 | /* Return whether a symbol is an MRI common symbol. */ | |
2225 | ||
2226 | int | |
74937d39 | 2227 | symbol_mri_common_p (symbolS *s) |
49309057 ILT |
2228 | { |
2229 | if (LOCAL_SYMBOL_CHECK (s)) | |
2230 | return 0; | |
2231 | return s->sy_mri_common; | |
2232 | } | |
2233 | ||
2234 | /* Mark a symbol as having been written. */ | |
2235 | ||
2236 | void | |
74937d39 | 2237 | symbol_mark_written (symbolS *s) |
49309057 ILT |
2238 | { |
2239 | if (LOCAL_SYMBOL_CHECK (s)) | |
2240 | return; | |
2241 | s->written = 1; | |
2242 | } | |
2243 | ||
2244 | /* Clear the mark of whether a symbol has been written. */ | |
2245 | ||
2246 | void | |
74937d39 | 2247 | symbol_clear_written (symbolS *s) |
49309057 ILT |
2248 | { |
2249 | if (LOCAL_SYMBOL_CHECK (s)) | |
2250 | return; | |
2251 | s->written = 0; | |
2252 | } | |
2253 | ||
2254 | /* Return whether a symbol has been written. */ | |
2255 | ||
2256 | int | |
74937d39 | 2257 | symbol_written_p (symbolS *s) |
49309057 ILT |
2258 | { |
2259 | if (LOCAL_SYMBOL_CHECK (s)) | |
2260 | return 0; | |
2261 | return s->written; | |
2262 | } | |
2263 | ||
2264 | /* Mark a symbol has having been resolved. */ | |
2265 | ||
2266 | void | |
74937d39 | 2267 | symbol_mark_resolved (symbolS *s) |
49309057 ILT |
2268 | { |
2269 | if (LOCAL_SYMBOL_CHECK (s)) | |
2270 | { | |
2271 | local_symbol_mark_resolved ((struct local_symbol *) s); | |
2272 | return; | |
2273 | } | |
2274 | s->sy_resolved = 1; | |
2275 | } | |
2276 | ||
2277 | /* Return whether a symbol has been resolved. */ | |
2278 | ||
2279 | int | |
74937d39 | 2280 | symbol_resolved_p (symbolS *s) |
49309057 ILT |
2281 | { |
2282 | if (LOCAL_SYMBOL_CHECK (s)) | |
2283 | return local_symbol_resolved_p ((struct local_symbol *) s); | |
2284 | return s->sy_resolved; | |
2285 | } | |
2286 | ||
2287 | /* Return whether a symbol is a section symbol. */ | |
2288 | ||
2289 | int | |
74937d39 | 2290 | symbol_section_p (symbolS *s ATTRIBUTE_UNUSED) |
49309057 ILT |
2291 | { |
2292 | if (LOCAL_SYMBOL_CHECK (s)) | |
2293 | return 0; | |
49309057 | 2294 | return (s->bsym->flags & BSF_SECTION_SYM) != 0; |
49309057 ILT |
2295 | } |
2296 | ||
2297 | /* Return whether a symbol is equated to another symbol. */ | |
2298 | ||
2299 | int | |
74937d39 | 2300 | symbol_equated_p (symbolS *s) |
49309057 ILT |
2301 | { |
2302 | if (LOCAL_SYMBOL_CHECK (s)) | |
2303 | return 0; | |
2304 | return s->sy_value.X_op == O_symbol; | |
2305 | } | |
2306 | ||
e0890092 AM |
2307 | /* Return whether a symbol is equated to another symbol, and should be |
2308 | treated specially when writing out relocs. */ | |
2309 | ||
2310 | int | |
74937d39 | 2311 | symbol_equated_reloc_p (symbolS *s) |
e0890092 AM |
2312 | { |
2313 | if (LOCAL_SYMBOL_CHECK (s)) | |
2314 | return 0; | |
2315 | /* X_op_symbol, normally not used for O_symbol, is set by | |
2316 | resolve_symbol_value to flag expression syms that have been | |
2317 | equated. */ | |
2318 | return (s->sy_value.X_op == O_symbol | |
7be1c489 | 2319 | #if defined (OBJ_COFF) && defined (TE_PE) |
977cdf5a NC |
2320 | && ! S_IS_WEAK (s) |
2321 | #endif | |
e0890092 AM |
2322 | && ((s->sy_resolved && s->sy_value.X_op_symbol != NULL) |
2323 | || ! S_IS_DEFINED (s) | |
2324 | || S_IS_COMMON (s))); | |
2325 | } | |
2326 | ||
49309057 ILT |
2327 | /* Return whether a symbol has a constant value. */ |
2328 | ||
2329 | int | |
74937d39 | 2330 | symbol_constant_p (symbolS *s) |
49309057 ILT |
2331 | { |
2332 | if (LOCAL_SYMBOL_CHECK (s)) | |
2333 | return 1; | |
2334 | return s->sy_value.X_op == O_constant; | |
2335 | } | |
2336 | ||
49309057 ILT |
2337 | /* Return the BFD symbol for a symbol. */ |
2338 | ||
2339 | asymbol * | |
74937d39 | 2340 | symbol_get_bfdsym (symbolS *s) |
49309057 ILT |
2341 | { |
2342 | if (LOCAL_SYMBOL_CHECK (s)) | |
2343 | s = local_symbol_convert ((struct local_symbol *) s); | |
2344 | return s->bsym; | |
2345 | } | |
2346 | ||
2347 | /* Set the BFD symbol for a symbol. */ | |
2348 | ||
2349 | void | |
74937d39 | 2350 | symbol_set_bfdsym (symbolS *s, asymbol *bsym) |
49309057 ILT |
2351 | { |
2352 | if (LOCAL_SYMBOL_CHECK (s)) | |
2353 | s = local_symbol_convert ((struct local_symbol *) s); | |
22fe14ad NC |
2354 | /* Usually, it is harmless to reset a symbol to a BFD section |
2355 | symbol. For example, obj_elf_change_section sets the BFD symbol | |
2356 | of an old symbol with the newly created section symbol. But when | |
2357 | we have multiple sections with the same name, the newly created | |
2358 | section may have the same name as an old section. We check if the | |
2359 | old symbol has been already marked as a section symbol before | |
2360 | resetting it. */ | |
2361 | if ((s->bsym->flags & BSF_SECTION_SYM) == 0) | |
2362 | s->bsym = bsym; | |
2363 | /* else XXX - What do we do now ? */ | |
49309057 ILT |
2364 | } |
2365 | ||
49309057 ILT |
2366 | #ifdef OBJ_SYMFIELD_TYPE |
2367 | ||
2368 | /* Get a pointer to the object format information for a symbol. */ | |
2369 | ||
2370 | OBJ_SYMFIELD_TYPE * | |
74937d39 | 2371 | symbol_get_obj (symbolS *s) |
49309057 ILT |
2372 | { |
2373 | if (LOCAL_SYMBOL_CHECK (s)) | |
2374 | s = local_symbol_convert ((struct local_symbol *) s); | |
2375 | return &s->sy_obj; | |
2376 | } | |
2377 | ||
2378 | /* Set the object format information for a symbol. */ | |
2379 | ||
2380 | void | |
74937d39 | 2381 | symbol_set_obj (symbolS *s, OBJ_SYMFIELD_TYPE *o) |
49309057 ILT |
2382 | { |
2383 | if (LOCAL_SYMBOL_CHECK (s)) | |
2384 | s = local_symbol_convert ((struct local_symbol *) s); | |
2385 | s->sy_obj = *o; | |
2386 | } | |
2387 | ||
2388 | #endif /* OBJ_SYMFIELD_TYPE */ | |
2389 | ||
2390 | #ifdef TC_SYMFIELD_TYPE | |
2391 | ||
2392 | /* Get a pointer to the processor information for a symbol. */ | |
2393 | ||
2394 | TC_SYMFIELD_TYPE * | |
74937d39 | 2395 | symbol_get_tc (symbolS *s) |
49309057 ILT |
2396 | { |
2397 | if (LOCAL_SYMBOL_CHECK (s)) | |
2398 | s = local_symbol_convert ((struct local_symbol *) s); | |
2399 | return &s->sy_tc; | |
2400 | } | |
2401 | ||
2402 | /* Set the processor information for a symbol. */ | |
2403 | ||
2404 | void | |
74937d39 | 2405 | symbol_set_tc (symbolS *s, TC_SYMFIELD_TYPE *o) |
49309057 ILT |
2406 | { |
2407 | if (LOCAL_SYMBOL_CHECK (s)) | |
2408 | s = local_symbol_convert ((struct local_symbol *) s); | |
2409 | s->sy_tc = *o; | |
2410 | } | |
2411 | ||
2412 | #endif /* TC_SYMFIELD_TYPE */ | |
2413 | ||
252b5132 | 2414 | void |
74937d39 | 2415 | symbol_begin (void) |
252b5132 RH |
2416 | { |
2417 | symbol_lastP = NULL; | |
7c743825 | 2418 | symbol_rootP = NULL; /* In case we have 0 symbols (!!) */ |
252b5132 | 2419 | sy_hash = hash_new (); |
49309057 | 2420 | local_hash = hash_new (); |
252b5132 RH |
2421 | |
2422 | memset ((char *) (&abs_symbol), '\0', sizeof (abs_symbol)); | |
252b5132 RH |
2423 | #if defined (EMIT_SECTION_SYMBOLS) || !defined (RELOC_REQUIRES_SYMBOL) |
2424 | abs_symbol.bsym = bfd_abs_section.symbol; | |
252b5132 RH |
2425 | #endif |
2426 | abs_symbol.sy_value.X_op = O_constant; | |
2427 | abs_symbol.sy_frag = &zero_address_frag; | |
2428 | ||
2429 | if (LOCAL_LABELS_FB) | |
2430 | fb_label_init (); | |
2431 | } | |
252b5132 RH |
2432 | \f |
2433 | int indent_level; | |
2434 | ||
2435 | /* Maximum indent level. | |
2436 | Available for modification inside a gdb session. */ | |
87c245cc | 2437 | static int max_indent_level = 8; |
252b5132 | 2438 | |
252b5132 | 2439 | void |
74937d39 | 2440 | print_symbol_value_1 (FILE *file, symbolS *sym) |
252b5132 RH |
2441 | { |
2442 | const char *name = S_GET_NAME (sym); | |
2443 | if (!name || !name[0]) | |
2444 | name = "(unnamed)"; | |
2445 | fprintf (file, "sym %lx %s", (unsigned long) sym, name); | |
49309057 ILT |
2446 | |
2447 | if (LOCAL_SYMBOL_CHECK (sym)) | |
2448 | { | |
2449 | struct local_symbol *locsym = (struct local_symbol *) sym; | |
2450 | if (local_symbol_get_frag (locsym) != &zero_address_frag | |
2451 | && local_symbol_get_frag (locsym) != NULL) | |
2452 | fprintf (file, " frag %lx", (long) local_symbol_get_frag (locsym)); | |
2453 | if (local_symbol_resolved_p (locsym)) | |
2454 | fprintf (file, " resolved"); | |
2455 | fprintf (file, " local"); | |
2456 | } | |
2457 | else | |
2458 | { | |
2459 | if (sym->sy_frag != &zero_address_frag) | |
2460 | fprintf (file, " frag %lx", (long) sym->sy_frag); | |
2461 | if (sym->written) | |
2462 | fprintf (file, " written"); | |
2463 | if (sym->sy_resolved) | |
2464 | fprintf (file, " resolved"); | |
2465 | else if (sym->sy_resolving) | |
2466 | fprintf (file, " resolving"); | |
2467 | if (sym->sy_used_in_reloc) | |
2468 | fprintf (file, " used-in-reloc"); | |
2469 | if (sym->sy_used) | |
2470 | fprintf (file, " used"); | |
2471 | if (S_IS_LOCAL (sym)) | |
2472 | fprintf (file, " local"); | |
e97b3f28 | 2473 | if (S_IS_EXTERNAL (sym)) |
49309057 ILT |
2474 | fprintf (file, " extern"); |
2475 | if (S_IS_DEBUG (sym)) | |
2476 | fprintf (file, " debug"); | |
2477 | if (S_IS_DEFINED (sym)) | |
2478 | fprintf (file, " defined"); | |
2479 | } | |
252b5132 | 2480 | fprintf (file, " %s", segment_name (S_GET_SEGMENT (sym))); |
49309057 | 2481 | if (symbol_resolved_p (sym)) |
252b5132 RH |
2482 | { |
2483 | segT s = S_GET_SEGMENT (sym); | |
2484 | ||
2485 | if (s != undefined_section | |
411863a4 | 2486 | && s != expr_section) |
252b5132 RH |
2487 | fprintf (file, " %lx", (long) S_GET_VALUE (sym)); |
2488 | } | |
2489 | else if (indent_level < max_indent_level | |
2490 | && S_GET_SEGMENT (sym) != undefined_section) | |
2491 | { | |
2492 | indent_level++; | |
2493 | fprintf (file, "\n%*s<", indent_level * 4, ""); | |
49309057 ILT |
2494 | if (LOCAL_SYMBOL_CHECK (sym)) |
2495 | fprintf (file, "constant %lx", | |
bd780143 | 2496 | (long) ((struct local_symbol *) sym)->lsy_value); |
49309057 ILT |
2497 | else |
2498 | print_expr_1 (file, &sym->sy_value); | |
252b5132 RH |
2499 | fprintf (file, ">"); |
2500 | indent_level--; | |
2501 | } | |
2502 | fflush (file); | |
2503 | } | |
2504 | ||
2505 | void | |
74937d39 | 2506 | print_symbol_value (symbolS *sym) |
252b5132 RH |
2507 | { |
2508 | indent_level = 0; | |
2509 | print_symbol_value_1 (stderr, sym); | |
2510 | fprintf (stderr, "\n"); | |
2511 | } | |
2512 | ||
2513 | static void | |
74937d39 | 2514 | print_binary (FILE *file, const char *name, expressionS *exp) |
252b5132 RH |
2515 | { |
2516 | indent_level++; | |
2517 | fprintf (file, "%s\n%*s<", name, indent_level * 4, ""); | |
2518 | print_symbol_value_1 (file, exp->X_add_symbol); | |
2519 | fprintf (file, ">\n%*s<", indent_level * 4, ""); | |
2520 | print_symbol_value_1 (file, exp->X_op_symbol); | |
2521 | fprintf (file, ">"); | |
2522 | indent_level--; | |
2523 | } | |
2524 | ||
2525 | void | |
74937d39 | 2526 | print_expr_1 (FILE *file, expressionS *exp) |
252b5132 RH |
2527 | { |
2528 | fprintf (file, "expr %lx ", (long) exp); | |
2529 | switch (exp->X_op) | |
2530 | { | |
2531 | case O_illegal: | |
2532 | fprintf (file, "illegal"); | |
2533 | break; | |
2534 | case O_absent: | |
2535 | fprintf (file, "absent"); | |
2536 | break; | |
2537 | case O_constant: | |
2538 | fprintf (file, "constant %lx", (long) exp->X_add_number); | |
2539 | break; | |
2540 | case O_symbol: | |
2541 | indent_level++; | |
2542 | fprintf (file, "symbol\n%*s<", indent_level * 4, ""); | |
2543 | print_symbol_value_1 (file, exp->X_add_symbol); | |
2544 | fprintf (file, ">"); | |
2545 | maybe_print_addnum: | |
2546 | if (exp->X_add_number) | |
2547 | fprintf (file, "\n%*s%lx", indent_level * 4, "", | |
2548 | (long) exp->X_add_number); | |
2549 | indent_level--; | |
2550 | break; | |
2551 | case O_register: | |
2552 | fprintf (file, "register #%d", (int) exp->X_add_number); | |
2553 | break; | |
2554 | case O_big: | |
2555 | fprintf (file, "big"); | |
2556 | break; | |
2557 | case O_uminus: | |
2558 | fprintf (file, "uminus -<"); | |
2559 | indent_level++; | |
2560 | print_symbol_value_1 (file, exp->X_add_symbol); | |
2561 | fprintf (file, ">"); | |
2562 | goto maybe_print_addnum; | |
2563 | case O_bit_not: | |
2564 | fprintf (file, "bit_not"); | |
2565 | break; | |
2566 | case O_multiply: | |
2567 | print_binary (file, "multiply", exp); | |
2568 | break; | |
2569 | case O_divide: | |
2570 | print_binary (file, "divide", exp); | |
2571 | break; | |
2572 | case O_modulus: | |
2573 | print_binary (file, "modulus", exp); | |
2574 | break; | |
2575 | case O_left_shift: | |
2576 | print_binary (file, "lshift", exp); | |
2577 | break; | |
2578 | case O_right_shift: | |
2579 | print_binary (file, "rshift", exp); | |
2580 | break; | |
2581 | case O_bit_inclusive_or: | |
2582 | print_binary (file, "bit_ior", exp); | |
2583 | break; | |
2584 | case O_bit_exclusive_or: | |
2585 | print_binary (file, "bit_xor", exp); | |
2586 | break; | |
2587 | case O_bit_and: | |
2588 | print_binary (file, "bit_and", exp); | |
2589 | break; | |
2590 | case O_eq: | |
2591 | print_binary (file, "eq", exp); | |
2592 | break; | |
2593 | case O_ne: | |
2594 | print_binary (file, "ne", exp); | |
2595 | break; | |
2596 | case O_lt: | |
2597 | print_binary (file, "lt", exp); | |
2598 | break; | |
2599 | case O_le: | |
2600 | print_binary (file, "le", exp); | |
2601 | break; | |
2602 | case O_ge: | |
2603 | print_binary (file, "ge", exp); | |
2604 | break; | |
2605 | case O_gt: | |
2606 | print_binary (file, "gt", exp); | |
2607 | break; | |
2608 | case O_logical_and: | |
2609 | print_binary (file, "logical_and", exp); | |
2610 | break; | |
2611 | case O_logical_or: | |
2612 | print_binary (file, "logical_or", exp); | |
2613 | break; | |
2614 | case O_add: | |
2615 | indent_level++; | |
2616 | fprintf (file, "add\n%*s<", indent_level * 4, ""); | |
2617 | print_symbol_value_1 (file, exp->X_add_symbol); | |
2618 | fprintf (file, ">\n%*s<", indent_level * 4, ""); | |
2619 | print_symbol_value_1 (file, exp->X_op_symbol); | |
2620 | fprintf (file, ">"); | |
2621 | goto maybe_print_addnum; | |
2622 | case O_subtract: | |
2623 | indent_level++; | |
2624 | fprintf (file, "subtract\n%*s<", indent_level * 4, ""); | |
2625 | print_symbol_value_1 (file, exp->X_add_symbol); | |
2626 | fprintf (file, ">\n%*s<", indent_level * 4, ""); | |
2627 | print_symbol_value_1 (file, exp->X_op_symbol); | |
2628 | fprintf (file, ">"); | |
2629 | goto maybe_print_addnum; | |
2630 | default: | |
2631 | fprintf (file, "{unknown opcode %d}", (int) exp->X_op); | |
2632 | break; | |
2633 | } | |
2634 | fflush (stdout); | |
2635 | } | |
2636 | ||
2637 | void | |
74937d39 | 2638 | print_expr (expressionS *exp) |
252b5132 RH |
2639 | { |
2640 | print_expr_1 (stderr, exp); | |
2641 | fprintf (stderr, "\n"); | |
2642 | } | |
2643 | ||
2644 | void | |
74937d39 | 2645 | symbol_print_statistics (FILE *file) |
252b5132 RH |
2646 | { |
2647 | hash_print_statistics (file, "symbol table", sy_hash); | |
49309057 ILT |
2648 | hash_print_statistics (file, "mini local symbol table", local_hash); |
2649 | fprintf (file, "%lu mini local symbols created, %lu converted\n", | |
2650 | local_symbol_count, local_symbol_conversion_count); | |
252b5132 | 2651 | } |