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252b5132 | 1 | /* symbols.c -symbol table- |
2571583a | 2 | Copyright (C) 1987-2017 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 8 | the Free Software Foundation; either version 3, or (at your option) |
252b5132 RH |
9 | any later version. |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to the Free | |
4b4da160 NC |
18 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
19 | 02110-1301, USA. */ | |
252b5132 | 20 | |
7c743825 | 21 | /* #define DEBUG_SYMS / * to debug symbol list maintenance. */ |
252b5132 | 22 | |
252b5132 | 23 | #include "as.h" |
3882b010 | 24 | #include "safe-ctype.h" |
252b5132 RH |
25 | #include "obstack.h" /* For "symbols.h" */ |
26 | #include "subsegs.h" | |
49309057 ILT |
27 | #include "struc-symbol.h" |
28 | ||
252b5132 RH |
29 | /* This is non-zero if symbols are case sensitive, which is the |
30 | default. */ | |
31 | int symbols_case_sensitive = 1; | |
32 | ||
33 | #ifndef WORKING_DOT_WORD | |
34 | extern int new_broken_words; | |
35 | #endif | |
36 | ||
37 | /* symbol-name => struct symbol pointer */ | |
38 | static struct hash_control *sy_hash; | |
39 | ||
49309057 ILT |
40 | /* Table of local symbols. */ |
41 | static struct hash_control *local_hash; | |
42 | ||
7c743825 | 43 | /* Below are commented in "symbols.h". */ |
252b5132 RH |
44 | symbolS *symbol_rootP; |
45 | symbolS *symbol_lastP; | |
46 | symbolS abs_symbol; | |
4a826962 | 47 | symbolS dot_symbol; |
252b5132 RH |
48 | |
49 | #ifdef DEBUG_SYMS | |
50 | #define debug_verify_symchain verify_symbol_chain | |
51 | #else | |
52 | #define debug_verify_symchain(root, last) ((void) 0) | |
53 | #endif | |
54 | ||
aa257fcd NC |
55 | #define DOLLAR_LABEL_CHAR '\001' |
56 | #define LOCAL_LABEL_CHAR '\002' | |
57 | ||
df58fc94 RS |
58 | #ifndef TC_LABEL_IS_LOCAL |
59 | #define TC_LABEL_IS_LOCAL(name) 0 | |
60 | #endif | |
61 | ||
252b5132 | 62 | struct obstack notes; |
22ba0981 | 63 | #ifdef TE_PE |
977cdf5a NC |
64 | /* The name of an external symbol which is |
65 | used to make weak PE symbol names unique. */ | |
66 | const char * an_external_name; | |
67 | #endif | |
252b5132 | 68 | |
b9bb4a93 | 69 | static const char *save_symbol_name (const char *); |
74937d39 KH |
70 | static void fb_label_init (void); |
71 | static long dollar_label_instance (long); | |
72 | static long fb_label_instance (long); | |
252b5132 | 73 | |
74937d39 | 74 | static void print_binary (FILE *, const char *, expressionS *); |
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 | ||
b9bb4a93 | 104 | static const char * |
74937d39 | 105 | save_symbol_name (const char *name) |
252b5132 | 106 | { |
e57e6ddc | 107 | size_t 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); |
1e9cc1c2 | 112 | ret = (char *) obstack_finish (¬es); |
49309057 | 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 | 134 | { |
b9bb4a93 | 135 | const char *preserved_copy_of_name; |
49309057 ILT |
136 | symbolS *symbolP; |
137 | ||
138 | preserved_copy_of_name = save_symbol_name (name); | |
139 | ||
1e9cc1c2 | 140 | symbolP = (symbolS *) obstack_alloc (¬es, sizeof (symbolS)); |
252b5132 | 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) | |
885afe7b | 147 | as_fatal ("bfd_make_empty_symbol: %s", bfd_errmsg (bfd_get_error ())); |
252b5132 RH |
148 | S_SET_NAME (symbolP, preserved_copy_of_name); |
149 | ||
150 | S_SET_SEGMENT (symbolP, segment); | |
151 | S_SET_VALUE (symbolP, valu); | |
152 | symbol_clear_list_pointers (symbolP); | |
153 | ||
154 | symbolP->sy_frag = frag; | |
252b5132 RH |
155 | |
156 | obj_symbol_new_hook (symbolP); | |
157 | ||
158 | #ifdef tc_symbol_new_hook | |
159 | tc_symbol_new_hook (symbolP); | |
160 | #endif | |
161 | ||
162 | return symbolP; | |
163 | } | |
164 | \f | |
49309057 ILT |
165 | |
166 | /* Local symbol support. If we can get away with it, we keep only a | |
167 | small amount of information for local symbols. */ | |
168 | ||
74937d39 | 169 | static symbolS *local_symbol_convert (struct local_symbol *); |
49309057 ILT |
170 | |
171 | /* Used for statistics. */ | |
172 | ||
173 | static unsigned long local_symbol_count; | |
174 | static unsigned long local_symbol_conversion_count; | |
175 | ||
176 | /* This macro is called with a symbol argument passed by reference. | |
177 | It returns whether this is a local symbol. If necessary, it | |
178 | changes its argument to the real symbol. */ | |
179 | ||
180 | #define LOCAL_SYMBOL_CHECK(s) \ | |
158184ac | 181 | (s->sy_flags.sy_local_symbol \ |
49309057 ILT |
182 | ? (local_symbol_converted_p ((struct local_symbol *) s) \ |
183 | ? (s = local_symbol_get_real_symbol ((struct local_symbol *) s), \ | |
184 | 0) \ | |
185 | : 1) \ | |
186 | : 0) | |
187 | ||
188 | /* Create a local symbol and insert it into the local hash table. */ | |
189 | ||
00ce9deb | 190 | struct local_symbol * |
91d6fa6a | 191 | local_symbol_make (const char *name, segT section, valueT val, fragS *frag) |
49309057 | 192 | { |
b9bb4a93 | 193 | const char *name_copy; |
49309057 ILT |
194 | struct local_symbol *ret; |
195 | ||
196 | ++local_symbol_count; | |
197 | ||
198 | name_copy = save_symbol_name (name); | |
199 | ||
1e9cc1c2 | 200 | ret = (struct local_symbol *) obstack_alloc (¬es, sizeof *ret); |
158184ac TG |
201 | ret->lsy_flags.sy_local_symbol = 1; |
202 | ret->lsy_flags.sy_resolved = 0; | |
49309057 ILT |
203 | ret->lsy_name = name_copy; |
204 | ret->lsy_section = section; | |
205 | local_symbol_set_frag (ret, frag); | |
91d6fa6a | 206 | ret->lsy_value = val; |
49309057 | 207 | |
5a49b8ac | 208 | hash_jam (local_hash, name_copy, (void *) ret); |
49309057 ILT |
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 | ||
158184ac | 221 | gas_assert (locsym->lsy_flags.sy_local_symbol); |
49309057 ILT |
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)) | |
158184ac | 231 | ret->sy_flags.sy_resolved = 1; |
49309057 ILT |
232 | |
233 | /* Local symbols are always either defined or used. */ | |
158184ac | 234 | ret->sy_flags.sy_used = 1; |
49309057 | 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 |
a3371076 AM |
250 | static void |
251 | define_sym_at_dot (symbolS *symbolP) | |
252 | { | |
253 | symbolP->sy_frag = frag_now; | |
a3371076 AM |
254 | S_SET_VALUE (symbolP, (valueT) frag_now_fix ()); |
255 | S_SET_SEGMENT (symbolP, now_seg); | |
256 | } | |
257 | ||
7c743825 KH |
258 | /* We have just seen "<name>:". |
259 | Creates a struct symbol unless it already exists. | |
260 | ||
261 | Gripes if we are redefining a symbol incompatibly (and ignores it). */ | |
252b5132 | 262 | |
252b5132 | 263 | symbolS * |
74937d39 | 264 | colon (/* Just seen "x:" - rattle symbols & frags. */ |
2b0f3761 | 265 | const char *sym_name /* Symbol name, as a canonical string. */ |
74937d39 | 266 | /* We copy this string: OK to alter later. */) |
252b5132 | 267 | { |
ed9e98c2 | 268 | symbolS *symbolP; /* Symbol we are working with. */ |
252b5132 | 269 | |
7cf10893 | 270 | /* Sun local labels go out of scope whenever a non-local symbol is |
252b5132 | 271 | defined. */ |
7be1c489 AM |
272 | if (LOCAL_LABELS_DOLLAR |
273 | && !bfd_is_local_label_name (stdoutput, sym_name)) | |
274 | dollar_label_clear (); | |
252b5132 RH |
275 | |
276 | #ifndef WORKING_DOT_WORD | |
277 | if (new_broken_words) | |
278 | { | |
279 | struct broken_word *a; | |
280 | int possible_bytes; | |
281 | fragS *frag_tmp; | |
282 | char *frag_opcode; | |
283 | ||
7cf10893 NC |
284 | if (now_seg == absolute_section) |
285 | { | |
286 | as_bad (_("cannot define symbol `%s' in absolute section"), sym_name); | |
287 | return NULL; | |
288 | } | |
1d3b2b27 | 289 | |
252b5132 RH |
290 | possible_bytes = (md_short_jump_size |
291 | + new_broken_words * md_long_jump_size); | |
292 | ||
293 | frag_tmp = frag_now; | |
294 | frag_opcode = frag_var (rs_broken_word, | |
295 | possible_bytes, | |
296 | possible_bytes, | |
297 | (relax_substateT) 0, | |
298 | (symbolS *) broken_words, | |
299 | (offsetT) 0, | |
300 | NULL); | |
301 | ||
7c743825 KH |
302 | /* We want to store the pointer to where to insert the jump |
303 | table in the fr_opcode of the rs_broken_word frag. This | |
304 | requires a little hackery. */ | |
252b5132 RH |
305 | while (frag_tmp |
306 | && (frag_tmp->fr_type != rs_broken_word | |
307 | || frag_tmp->fr_opcode)) | |
308 | frag_tmp = frag_tmp->fr_next; | |
309 | know (frag_tmp); | |
310 | frag_tmp->fr_opcode = frag_opcode; | |
311 | new_broken_words = 0; | |
312 | ||
313 | for (a = broken_words; a && a->dispfrag == 0; a = a->next_broken_word) | |
314 | a->dispfrag = frag_tmp; | |
315 | } | |
316 | #endif /* WORKING_DOT_WORD */ | |
317 | ||
cdaa5616 IS |
318 | #ifdef obj_frob_colon |
319 | obj_frob_colon (sym_name); | |
320 | #endif | |
321 | ||
252b5132 RH |
322 | if ((symbolP = symbol_find (sym_name)) != 0) |
323 | { | |
06e77878 | 324 | S_CLEAR_WEAKREFR (symbolP); |
252b5132 RH |
325 | #ifdef RESOLVE_SYMBOL_REDEFINITION |
326 | if (RESOLVE_SYMBOL_REDEFINITION (symbolP)) | |
327 | return symbolP; | |
328 | #endif | |
7c743825 | 329 | /* Now check for undefined symbols. */ |
49309057 ILT |
330 | if (LOCAL_SYMBOL_CHECK (symbolP)) |
331 | { | |
332 | struct local_symbol *locsym = (struct local_symbol *) symbolP; | |
333 | ||
334 | if (locsym->lsy_section != undefined_section | |
335 | && (local_symbol_get_frag (locsym) != frag_now | |
336 | || locsym->lsy_section != now_seg | |
bd780143 | 337 | || locsym->lsy_value != frag_now_fix ())) |
49309057 | 338 | { |
0e389e77 | 339 | as_bad (_("symbol `%s' is already defined"), sym_name); |
49309057 ILT |
340 | return symbolP; |
341 | } | |
342 | ||
343 | locsym->lsy_section = now_seg; | |
344 | local_symbol_set_frag (locsym, frag_now); | |
bd780143 | 345 | locsym->lsy_value = frag_now_fix (); |
49309057 | 346 | } |
b54788f8 | 347 | else if (!(S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP)) |
92757bc9 JB |
348 | || S_IS_COMMON (symbolP) |
349 | || S_IS_VOLATILE (symbolP)) | |
252b5132 | 350 | { |
89cdfe57 | 351 | if (S_IS_VOLATILE (symbolP)) |
92757bc9 JB |
352 | { |
353 | symbolP = symbol_clone (symbolP, 1); | |
354 | S_SET_VALUE (symbolP, 0); | |
355 | S_CLEAR_VOLATILE (symbolP); | |
356 | } | |
252b5132 RH |
357 | if (S_GET_VALUE (symbolP) == 0) |
358 | { | |
a3371076 | 359 | define_sym_at_dot (symbolP); |
252b5132 RH |
360 | #ifdef N_UNDF |
361 | know (N_UNDF == 0); | |
7c743825 | 362 | #endif /* if we have one, it better be zero. */ |
252b5132 RH |
363 | |
364 | } | |
365 | else | |
366 | { | |
7c743825 KH |
367 | /* There are still several cases to check: |
368 | ||
369 | A .comm/.lcomm symbol being redefined as initialized | |
370 | data is OK | |
371 | ||
372 | A .comm/.lcomm symbol being redefined with a larger | |
373 | size is also OK | |
374 | ||
375 | This only used to be allowed on VMS gas, but Sun cc | |
376 | on the sparc also depends on it. */ | |
252b5132 RH |
377 | |
378 | if (((!S_IS_DEBUG (symbolP) | |
379 | && (!S_IS_DEFINED (symbolP) || S_IS_COMMON (symbolP)) | |
380 | && S_IS_EXTERNAL (symbolP)) | |
381 | || S_GET_SEGMENT (symbolP) == bss_section) | |
382 | && (now_seg == data_section | |
b3ce1bf7 | 383 | || now_seg == bss_section |
252b5132 RH |
384 | || now_seg == S_GET_SEGMENT (symbolP))) |
385 | { | |
7c743825 | 386 | /* Select which of the 2 cases this is. */ |
252b5132 RH |
387 | if (now_seg != data_section) |
388 | { | |
7c743825 KH |
389 | /* New .comm for prev .comm symbol. |
390 | ||
391 | If the new size is larger we just change its | |
392 | value. If the new size is smaller, we ignore | |
393 | this symbol. */ | |
252b5132 RH |
394 | if (S_GET_VALUE (symbolP) |
395 | < ((unsigned) frag_now_fix ())) | |
396 | { | |
397 | S_SET_VALUE (symbolP, (valueT) frag_now_fix ()); | |
398 | } | |
399 | } | |
400 | else | |
401 | { | |
402 | /* It is a .comm/.lcomm being converted to initialized | |
403 | data. */ | |
a3371076 | 404 | define_sym_at_dot (symbolP); |
252b5132 RH |
405 | } |
406 | } | |
407 | else | |
408 | { | |
4c63da97 AM |
409 | #if (!defined (OBJ_AOUT) && !defined (OBJ_MAYBE_AOUT) \ |
410 | && !defined (OBJ_BOUT) && !defined (OBJ_MAYBE_BOUT)) | |
411 | static const char *od_buf = ""; | |
252b5132 | 412 | #else |
4c63da97 AM |
413 | char od_buf[100]; |
414 | od_buf[0] = '\0'; | |
4c63da97 | 415 | if (OUTPUT_FLAVOR == bfd_target_aout_flavour) |
d1a6c242 KH |
416 | sprintf (od_buf, "%d.%d.", |
417 | S_GET_OTHER (symbolP), | |
418 | S_GET_DESC (symbolP)); | |
4c63da97 | 419 | #endif |
0e389e77 | 420 | as_bad (_("symbol `%s' is already defined as \"%s\"/%s%ld"), |
252b5132 RH |
421 | sym_name, |
422 | segment_name (S_GET_SEGMENT (symbolP)), | |
4c63da97 | 423 | od_buf, |
252b5132 | 424 | (long) S_GET_VALUE (symbolP)); |
252b5132 | 425 | } |
7c743825 | 426 | } /* if the undefined symbol has no value */ |
252b5132 RH |
427 | } |
428 | else | |
429 | { | |
7c743825 | 430 | /* Don't blow up if the definition is the same. */ |
252b5132 RH |
431 | if (!(frag_now == symbolP->sy_frag |
432 | && S_GET_VALUE (symbolP) == frag_now_fix () | |
433 | && S_GET_SEGMENT (symbolP) == now_seg)) | |
92757bc9 JB |
434 | { |
435 | as_bad (_("symbol `%s' is already defined"), sym_name); | |
436 | symbolP = symbol_clone (symbolP, 0); | |
a3371076 | 437 | define_sym_at_dot (symbolP); |
92757bc9 | 438 | } |
d4887adc | 439 | } |
252b5132 RH |
440 | |
441 | } | |
49309057 ILT |
442 | else if (! flag_keep_locals && bfd_is_local_label_name (stdoutput, sym_name)) |
443 | { | |
444 | symbolP = (symbolS *) local_symbol_make (sym_name, now_seg, | |
445 | (valueT) frag_now_fix (), | |
446 | frag_now); | |
447 | } | |
252b5132 RH |
448 | else |
449 | { | |
450 | symbolP = symbol_new (sym_name, now_seg, (valueT) frag_now_fix (), | |
451 | frag_now); | |
252b5132 RH |
452 | |
453 | symbol_table_insert (symbolP); | |
d4887adc | 454 | } |
252b5132 RH |
455 | |
456 | if (mri_common_symbol != NULL) | |
457 | { | |
458 | /* This symbol is actually being defined within an MRI common | |
1d3b2b27 | 459 | section. This requires special handling. */ |
49309057 ILT |
460 | if (LOCAL_SYMBOL_CHECK (symbolP)) |
461 | symbolP = local_symbol_convert ((struct local_symbol *) symbolP); | |
252b5132 RH |
462 | symbolP->sy_value.X_op = O_symbol; |
463 | symbolP->sy_value.X_add_symbol = mri_common_symbol; | |
464 | symbolP->sy_value.X_add_number = S_GET_VALUE (mri_common_symbol); | |
465 | symbolP->sy_frag = &zero_address_frag; | |
466 | S_SET_SEGMENT (symbolP, expr_section); | |
158184ac | 467 | symbolP->sy_flags.sy_mri_common = 1; |
252b5132 RH |
468 | } |
469 | ||
470 | #ifdef tc_frob_label | |
471 | tc_frob_label (symbolP); | |
472 | #endif | |
473 | #ifdef obj_frob_label | |
474 | obj_frob_label (symbolP); | |
475 | #endif | |
476 | ||
477 | return symbolP; | |
478 | } | |
479 | \f | |
7c743825 | 480 | /* Die if we can't insert the symbol. */ |
252b5132 | 481 | |
7c743825 | 482 | void |
74937d39 | 483 | symbol_table_insert (symbolS *symbolP) |
252b5132 | 484 | { |
ed9e98c2 | 485 | const char *error_string; |
252b5132 RH |
486 | |
487 | know (symbolP); | |
488 | know (S_GET_NAME (symbolP)); | |
489 | ||
49309057 ILT |
490 | if (LOCAL_SYMBOL_CHECK (symbolP)) |
491 | { | |
492 | error_string = hash_jam (local_hash, S_GET_NAME (symbolP), | |
5a49b8ac | 493 | (void *) symbolP); |
49309057 | 494 | if (error_string != NULL) |
0e389e77 | 495 | as_fatal (_("inserting \"%s\" into symbol table failed: %s"), |
49309057 ILT |
496 | S_GET_NAME (symbolP), error_string); |
497 | return; | |
498 | } | |
499 | ||
5a49b8ac | 500 | if ((error_string = hash_jam (sy_hash, S_GET_NAME (symbolP), (void *) symbolP))) |
252b5132 | 501 | { |
0e389e77 | 502 | as_fatal (_("inserting \"%s\" into symbol table failed: %s"), |
252b5132 | 503 | S_GET_NAME (symbolP), error_string); |
7c743825 KH |
504 | } /* on error */ |
505 | } | |
252b5132 | 506 | \f |
7c743825 KH |
507 | /* If a symbol name does not exist, create it as undefined, and insert |
508 | it into the symbol table. Return a pointer to it. */ | |
509 | ||
252b5132 | 510 | symbolS * |
74937d39 | 511 | symbol_find_or_make (const char *name) |
252b5132 | 512 | { |
ed9e98c2 | 513 | symbolS *symbolP; |
252b5132 RH |
514 | |
515 | symbolP = symbol_find (name); | |
516 | ||
517 | if (symbolP == NULL) | |
518 | { | |
49309057 ILT |
519 | if (! flag_keep_locals && bfd_is_local_label_name (stdoutput, name)) |
520 | { | |
521 | symbolP = md_undefined_symbol ((char *) name); | |
522 | if (symbolP != NULL) | |
523 | return symbolP; | |
524 | ||
525 | symbolP = (symbolS *) local_symbol_make (name, undefined_section, | |
526 | (valueT) 0, | |
527 | &zero_address_frag); | |
528 | return symbolP; | |
529 | } | |
49309057 | 530 | |
252b5132 RH |
531 | symbolP = symbol_make (name); |
532 | ||
533 | symbol_table_insert (symbolP); | |
534 | } /* if symbol wasn't found */ | |
535 | ||
536 | return (symbolP); | |
7c743825 | 537 | } |
252b5132 RH |
538 | |
539 | symbolS * | |
74937d39 | 540 | symbol_make (const char *name) |
252b5132 RH |
541 | { |
542 | symbolS *symbolP; | |
543 | ||
7c743825 | 544 | /* Let the machine description default it, e.g. for register names. */ |
252b5132 RH |
545 | symbolP = md_undefined_symbol ((char *) name); |
546 | ||
547 | if (!symbolP) | |
548 | symbolP = symbol_new (name, undefined_section, (valueT) 0, &zero_address_frag); | |
549 | ||
550 | return (symbolP); | |
7c743825 | 551 | } |
252b5132 | 552 | |
9497f5ac NC |
553 | symbolS * |
554 | symbol_clone (symbolS *orgsymP, int replace) | |
555 | { | |
556 | symbolS *newsymP; | |
6a2b6326 | 557 | asymbol *bsymorg, *bsymnew; |
9497f5ac | 558 | |
4a826962 MR |
559 | /* Make sure we never clone the dot special symbol. */ |
560 | gas_assert (orgsymP != &dot_symbol); | |
561 | ||
9497f5ac NC |
562 | /* Running local_symbol_convert on a clone that's not the one currently |
563 | in local_hash would incorrectly replace the hash entry. Thus the | |
564 | symbol must be converted here. Note that the rest of the function | |
565 | depends on not encountering an unconverted symbol. */ | |
566 | if (LOCAL_SYMBOL_CHECK (orgsymP)) | |
567 | orgsymP = local_symbol_convert ((struct local_symbol *) orgsymP); | |
6a2b6326 | 568 | bsymorg = orgsymP->bsym; |
9497f5ac | 569 | |
1e9cc1c2 | 570 | newsymP = (symbolS *) obstack_alloc (¬es, sizeof (*newsymP)); |
9497f5ac | 571 | *newsymP = *orgsymP; |
6a2b6326 JB |
572 | bsymnew = bfd_make_empty_symbol (bfd_asymbol_bfd (bsymorg)); |
573 | if (bsymnew == NULL) | |
885afe7b | 574 | as_fatal ("bfd_make_empty_symbol: %s", bfd_errmsg (bfd_get_error ())); |
6a2b6326 JB |
575 | newsymP->bsym = bsymnew; |
576 | bsymnew->name = bsymorg->name; | |
25313d6a | 577 | bsymnew->flags = bsymorg->flags & ~BSF_SECTION_SYM; |
9d75b288 | 578 | bsymnew->section = bsymorg->section; |
6a2b6326 JB |
579 | bfd_copy_private_symbol_data (bfd_asymbol_bfd (bsymorg), bsymorg, |
580 | bfd_asymbol_bfd (bsymnew), bsymnew); | |
581 | ||
582 | #ifdef obj_symbol_clone_hook | |
583 | obj_symbol_clone_hook (newsymP, orgsymP); | |
584 | #endif | |
585 | ||
586 | #ifdef tc_symbol_clone_hook | |
587 | tc_symbol_clone_hook (newsymP, orgsymP); | |
588 | #endif | |
9497f5ac NC |
589 | |
590 | if (replace) | |
591 | { | |
592 | if (symbol_rootP == orgsymP) | |
593 | symbol_rootP = newsymP; | |
594 | else if (orgsymP->sy_previous) | |
595 | { | |
596 | orgsymP->sy_previous->sy_next = newsymP; | |
597 | orgsymP->sy_previous = NULL; | |
598 | } | |
599 | if (symbol_lastP == orgsymP) | |
600 | symbol_lastP = newsymP; | |
601 | else if (orgsymP->sy_next) | |
602 | orgsymP->sy_next->sy_previous = newsymP; | |
73e24c68 AM |
603 | |
604 | /* Symbols that won't be output can't be external. */ | |
605 | S_CLEAR_EXTERNAL (orgsymP); | |
bdf128d6 | 606 | orgsymP->sy_previous = orgsymP->sy_next = orgsymP; |
9497f5ac NC |
607 | debug_verify_symchain (symbol_rootP, symbol_lastP); |
608 | ||
609 | symbol_table_insert (newsymP); | |
610 | } | |
bdf128d6 | 611 | else |
73e24c68 AM |
612 | { |
613 | /* Symbols that won't be output can't be external. */ | |
614 | S_CLEAR_EXTERNAL (newsymP); | |
615 | newsymP->sy_previous = newsymP->sy_next = newsymP; | |
616 | } | |
9497f5ac NC |
617 | |
618 | return newsymP; | |
619 | } | |
620 | ||
621 | /* Referenced symbols, if they are forward references, need to be cloned | |
622 | (without replacing the original) so that the value of the referenced | |
623 | symbols at the point of use . */ | |
624 | ||
625 | #undef symbol_clone_if_forward_ref | |
626 | symbolS * | |
627 | symbol_clone_if_forward_ref (symbolS *symbolP, int is_forward) | |
628 | { | |
629 | if (symbolP && !LOCAL_SYMBOL_CHECK (symbolP)) | |
630 | { | |
631 | symbolS *add_symbol = symbolP->sy_value.X_add_symbol; | |
632 | symbolS *op_symbol = symbolP->sy_value.X_op_symbol; | |
633 | ||
158184ac | 634 | if (symbolP->sy_flags.sy_forward_ref) |
9497f5ac NC |
635 | is_forward = 1; |
636 | ||
637 | if (is_forward) | |
638 | { | |
639 | /* assign_symbol() clones volatile symbols; pre-existing expressions | |
640 | hold references to the original instance, but want the current | |
641 | value. Just repeat the lookup. */ | |
642 | if (add_symbol && S_IS_VOLATILE (add_symbol)) | |
643 | add_symbol = symbol_find_exact (S_GET_NAME (add_symbol)); | |
644 | if (op_symbol && S_IS_VOLATILE (op_symbol)) | |
645 | op_symbol = symbol_find_exact (S_GET_NAME (op_symbol)); | |
646 | } | |
647 | ||
648 | /* Re-using sy_resolving here, as this routine cannot get called from | |
649 | symbol resolution code. */ | |
158184ac TG |
650 | if ((symbolP->bsym->section == expr_section |
651 | || symbolP->sy_flags.sy_forward_ref) | |
652 | && !symbolP->sy_flags.sy_resolving) | |
9497f5ac | 653 | { |
158184ac | 654 | symbolP->sy_flags.sy_resolving = 1; |
9497f5ac NC |
655 | add_symbol = symbol_clone_if_forward_ref (add_symbol, is_forward); |
656 | op_symbol = symbol_clone_if_forward_ref (op_symbol, is_forward); | |
158184ac | 657 | symbolP->sy_flags.sy_resolving = 0; |
9497f5ac NC |
658 | } |
659 | ||
158184ac | 660 | if (symbolP->sy_flags.sy_forward_ref |
9497f5ac NC |
661 | || add_symbol != symbolP->sy_value.X_add_symbol |
662 | || op_symbol != symbolP->sy_value.X_op_symbol) | |
3df4e177 | 663 | { |
4a826962 MR |
664 | if (symbolP != &dot_symbol) |
665 | { | |
666 | symbolP = symbol_clone (symbolP, 0); | |
158184ac | 667 | symbolP->sy_flags.sy_resolving = 0; |
4a826962 MR |
668 | } |
669 | else | |
a1facbec MR |
670 | { |
671 | symbolP = symbol_temp_new_now (); | |
672 | #ifdef tc_new_dot_label | |
673 | tc_new_dot_label (symbolP); | |
674 | #endif | |
675 | } | |
3df4e177 | 676 | } |
9497f5ac NC |
677 | |
678 | symbolP->sy_value.X_add_symbol = add_symbol; | |
679 | symbolP->sy_value.X_op_symbol = op_symbol; | |
680 | } | |
681 | ||
682 | return symbolP; | |
683 | } | |
684 | ||
b7d6ed97 | 685 | symbolS * |
74937d39 | 686 | symbol_temp_new (segT seg, valueT ofs, fragS *frag) |
b7d6ed97 | 687 | { |
756d1d01 | 688 | return symbol_new (FAKE_LABEL_NAME, seg, ofs, frag); |
b7d6ed97 RH |
689 | } |
690 | ||
691 | symbolS * | |
74937d39 | 692 | symbol_temp_new_now (void) |
b7d6ed97 RH |
693 | { |
694 | return symbol_temp_new (now_seg, frag_now_fix (), frag_now); | |
695 | } | |
696 | ||
697 | symbolS * | |
74937d39 | 698 | symbol_temp_make (void) |
b7d6ed97 | 699 | { |
756d1d01 | 700 | return symbol_make (FAKE_LABEL_NAME); |
b7d6ed97 RH |
701 | } |
702 | ||
7c743825 KH |
703 | /* Implement symbol table lookup. |
704 | In: A symbol's name as a string: '\0' can't be part of a symbol name. | |
705 | Out: NULL if the name was not in the symbol table, else the address | |
706 | of a struct symbol associated with that name. */ | |
252b5132 | 707 | |
9758f3fc | 708 | symbolS * |
74937d39 | 709 | symbol_find_exact (const char *name) |
06e77878 AO |
710 | { |
711 | return symbol_find_exact_noref (name, 0); | |
712 | } | |
713 | ||
714 | symbolS * | |
715 | symbol_find_exact_noref (const char *name, int noref) | |
9758f3fc | 716 | { |
7be1c489 | 717 | struct local_symbol *locsym; |
06e77878 | 718 | symbolS* sym; |
9758f3fc | 719 | |
7be1c489 AM |
720 | locsym = (struct local_symbol *) hash_find (local_hash, name); |
721 | if (locsym != NULL) | |
722 | return (symbolS *) locsym; | |
9758f3fc | 723 | |
06e77878 AO |
724 | sym = ((symbolS *) hash_find (sy_hash, name)); |
725 | ||
726 | /* Any references to the symbol, except for the reference in | |
727 | .weakref, must clear this flag, such that the symbol does not | |
728 | turn into a weak symbol. Note that we don't have to handle the | |
729 | local_symbol case, since a weakrefd is always promoted out of the | |
730 | local_symbol table when it is turned into a weak symbol. */ | |
731 | if (sym && ! noref) | |
732 | S_CLEAR_WEAKREFD (sym); | |
733 | ||
734 | return sym; | |
9758f3fc AM |
735 | } |
736 | ||
252b5132 | 737 | symbolS * |
91c4c449 | 738 | symbol_find (const char *name) |
06e77878 AO |
739 | { |
740 | return symbol_find_noref (name, 0); | |
741 | } | |
742 | ||
743 | symbolS * | |
744 | symbol_find_noref (const char *name, int noref) | |
252b5132 | 745 | { |
e1fa0163 NC |
746 | symbolS * result; |
747 | char * copy = NULL; | |
748 | ||
252b5132 RH |
749 | #ifdef tc_canonicalize_symbol_name |
750 | { | |
e1fa0163 | 751 | copy = xstrdup (name); |
252b5132 RH |
752 | name = tc_canonicalize_symbol_name (copy); |
753 | } | |
754 | #endif | |
755 | ||
756 | if (! symbols_case_sensitive) | |
757 | { | |
03987ced | 758 | const char *orig; |
e1fa0163 | 759 | char *copy2 = NULL; |
03987ced RH |
760 | unsigned char c; |
761 | ||
762 | orig = name; | |
e1fa0163 NC |
763 | if (copy != NULL) |
764 | copy2 = copy; | |
325801bd | 765 | name = copy = XNEWVEC (char, strlen (name) + 1); |
03987ced RH |
766 | |
767 | while ((c = *orig++) != '\0') | |
e1fa0163 | 768 | *copy++ = TOUPPER (c); |
03987ced | 769 | *copy = '\0'; |
e1fa0163 NC |
770 | |
771 | if (copy2 != NULL) | |
772 | free (copy2); | |
773 | copy = (char *) name; | |
252b5132 RH |
774 | } |
775 | ||
e1fa0163 NC |
776 | result = symbol_find_exact_noref (name, noref); |
777 | if (copy != NULL) | |
778 | free (copy); | |
779 | return result; | |
252b5132 RH |
780 | } |
781 | ||
7c743825 KH |
782 | /* Once upon a time, symbols were kept in a singly linked list. At |
783 | least coff needs to be able to rearrange them from time to time, for | |
784 | which a doubly linked list is much more convenient. Loic did these | |
785 | as macros which seemed dangerous to me so they're now functions. | |
786 | xoxorich. */ | |
787 | ||
788 | /* Link symbol ADDME after symbol TARGET in the chain. */ | |
252b5132 | 789 | |
7c743825 | 790 | void |
74937d39 KH |
791 | symbol_append (symbolS *addme, symbolS *target, |
792 | symbolS **rootPP, symbolS **lastPP) | |
252b5132 | 793 | { |
49309057 ILT |
794 | if (LOCAL_SYMBOL_CHECK (addme)) |
795 | abort (); | |
796 | if (target != NULL && LOCAL_SYMBOL_CHECK (target)) | |
797 | abort (); | |
798 | ||
252b5132 RH |
799 | if (target == NULL) |
800 | { | |
801 | know (*rootPP == NULL); | |
802 | know (*lastPP == NULL); | |
803 | addme->sy_next = NULL; | |
252b5132 | 804 | addme->sy_previous = NULL; |
252b5132 RH |
805 | *rootPP = addme; |
806 | *lastPP = addme; | |
807 | return; | |
7c743825 | 808 | } /* if the list is empty */ |
252b5132 RH |
809 | |
810 | if (target->sy_next != NULL) | |
811 | { | |
252b5132 | 812 | target->sy_next->sy_previous = addme; |
252b5132 RH |
813 | } |
814 | else | |
815 | { | |
816 | know (*lastPP == target); | |
817 | *lastPP = addme; | |
7c743825 | 818 | } /* if we have a next */ |
252b5132 RH |
819 | |
820 | addme->sy_next = target->sy_next; | |
821 | target->sy_next = addme; | |
252b5132 | 822 | addme->sy_previous = target; |
252b5132 RH |
823 | |
824 | debug_verify_symchain (symbol_rootP, symbol_lastP); | |
825 | } | |
826 | ||
7c743825 KH |
827 | /* Set the chain pointers of SYMBOL to null. */ |
828 | ||
829 | void | |
74937d39 | 830 | symbol_clear_list_pointers (symbolS *symbolP) |
252b5132 | 831 | { |
49309057 ILT |
832 | if (LOCAL_SYMBOL_CHECK (symbolP)) |
833 | abort (); | |
252b5132 | 834 | symbolP->sy_next = NULL; |
252b5132 | 835 | symbolP->sy_previous = NULL; |
252b5132 RH |
836 | } |
837 | ||
7c743825 KH |
838 | /* Remove SYMBOLP from the list. */ |
839 | ||
840 | void | |
74937d39 | 841 | symbol_remove (symbolS *symbolP, symbolS **rootPP, symbolS **lastPP) |
252b5132 | 842 | { |
49309057 ILT |
843 | if (LOCAL_SYMBOL_CHECK (symbolP)) |
844 | abort (); | |
845 | ||
252b5132 RH |
846 | if (symbolP == *rootPP) |
847 | { | |
848 | *rootPP = symbolP->sy_next; | |
7c743825 | 849 | } /* if it was the root */ |
252b5132 RH |
850 | |
851 | if (symbolP == *lastPP) | |
852 | { | |
853 | *lastPP = symbolP->sy_previous; | |
7c743825 | 854 | } /* if it was the tail */ |
252b5132 RH |
855 | |
856 | if (symbolP->sy_next != NULL) | |
857 | { | |
858 | symbolP->sy_next->sy_previous = symbolP->sy_previous; | |
7c743825 | 859 | } /* if not last */ |
252b5132 RH |
860 | |
861 | if (symbolP->sy_previous != NULL) | |
862 | { | |
863 | symbolP->sy_previous->sy_next = symbolP->sy_next; | |
7c743825 | 864 | } /* if not first */ |
252b5132 RH |
865 | |
866 | debug_verify_symchain (*rootPP, *lastPP); | |
867 | } | |
868 | ||
7c743825 KH |
869 | /* Link symbol ADDME before symbol TARGET in the chain. */ |
870 | ||
871 | void | |
74937d39 KH |
872 | symbol_insert (symbolS *addme, symbolS *target, |
873 | symbolS **rootPP, symbolS **lastPP ATTRIBUTE_UNUSED) | |
252b5132 | 874 | { |
49309057 ILT |
875 | if (LOCAL_SYMBOL_CHECK (addme)) |
876 | abort (); | |
877 | if (LOCAL_SYMBOL_CHECK (target)) | |
878 | abort (); | |
879 | ||
252b5132 RH |
880 | if (target->sy_previous != NULL) |
881 | { | |
882 | target->sy_previous->sy_next = addme; | |
883 | } | |
884 | else | |
885 | { | |
886 | know (*rootPP == target); | |
887 | *rootPP = addme; | |
7c743825 | 888 | } /* if not first */ |
252b5132 RH |
889 | |
890 | addme->sy_previous = target->sy_previous; | |
891 | target->sy_previous = addme; | |
892 | addme->sy_next = target; | |
893 | ||
894 | debug_verify_symchain (*rootPP, *lastPP); | |
895 | } | |
896 | ||
7c743825 | 897 | void |
74937d39 | 898 | verify_symbol_chain (symbolS *rootP, symbolS *lastP) |
252b5132 RH |
899 | { |
900 | symbolS *symbolP = rootP; | |
901 | ||
902 | if (symbolP == NULL) | |
903 | return; | |
904 | ||
905 | for (; symbol_next (symbolP) != NULL; symbolP = symbol_next (symbolP)) | |
906 | { | |
9c2799c2 | 907 | gas_assert (symbolP->bsym != NULL); |
158184ac | 908 | gas_assert (symbolP->sy_flags.sy_local_symbol == 0); |
9c2799c2 | 909 | gas_assert (symbolP->sy_next->sy_previous == symbolP); |
252b5132 RH |
910 | } |
911 | ||
9c2799c2 | 912 | gas_assert (lastP == symbolP); |
252b5132 RH |
913 | } |
914 | ||
280d71bf DB |
915 | #ifdef OBJ_COMPLEX_RELC |
916 | ||
917 | static int | |
918 | use_complex_relocs_for (symbolS * symp) | |
919 | { | |
920 | switch (symp->sy_value.X_op) | |
921 | { | |
922 | case O_constant: | |
923 | return 0; | |
924 | ||
925 | case O_symbol: | |
926 | case O_symbol_rva: | |
927 | case O_uminus: | |
928 | case O_bit_not: | |
929 | case O_logical_not: | |
930 | if ( (S_IS_COMMON (symp->sy_value.X_add_symbol) | |
931 | || S_IS_LOCAL (symp->sy_value.X_add_symbol)) | |
932 | && | |
933 | (S_IS_DEFINED (symp->sy_value.X_add_symbol) | |
934 | && S_GET_SEGMENT (symp->sy_value.X_add_symbol) != expr_section)) | |
935 | return 0; | |
936 | break; | |
937 | ||
938 | case O_multiply: | |
939 | case O_divide: | |
940 | case O_modulus: | |
941 | case O_left_shift: | |
942 | case O_right_shift: | |
943 | case O_bit_inclusive_or: | |
944 | case O_bit_or_not: | |
945 | case O_bit_exclusive_or: | |
946 | case O_bit_and: | |
947 | case O_add: | |
948 | case O_subtract: | |
949 | case O_eq: | |
950 | case O_ne: | |
951 | case O_lt: | |
952 | case O_le: | |
953 | case O_ge: | |
954 | case O_gt: | |
955 | case O_logical_and: | |
956 | case O_logical_or: | |
957 | ||
958 | if ( (S_IS_COMMON (symp->sy_value.X_add_symbol) | |
959 | || S_IS_LOCAL (symp->sy_value.X_add_symbol)) | |
34bca508 | 960 | && |
280d71bf DB |
961 | (S_IS_COMMON (symp->sy_value.X_op_symbol) |
962 | || S_IS_LOCAL (symp->sy_value.X_op_symbol)) | |
963 | ||
964 | && S_IS_DEFINED (symp->sy_value.X_add_symbol) | |
965 | && S_IS_DEFINED (symp->sy_value.X_op_symbol) | |
966 | && S_GET_SEGMENT (symp->sy_value.X_add_symbol) != expr_section | |
967 | && S_GET_SEGMENT (symp->sy_value.X_op_symbol) != expr_section) | |
968 | return 0; | |
969 | break; | |
34bca508 | 970 | |
280d71bf DB |
971 | default: |
972 | break; | |
973 | } | |
974 | return 1; | |
975 | } | |
976 | #endif | |
977 | ||
0909233e | 978 | static void |
5a0ade8b | 979 | report_op_error (symbolS *symp, symbolS *left, operatorT op, symbolS *right) |
0909233e | 980 | { |
3b4dbbbf | 981 | const char *file; |
0909233e | 982 | unsigned int line; |
5a0ade8b AM |
983 | segT seg_left = left ? S_GET_SEGMENT (left) : 0; |
984 | segT seg_right = S_GET_SEGMENT (right); | |
985 | const char *opname; | |
986 | ||
987 | switch (op) | |
988 | { | |
989 | default: | |
990 | abort (); | |
991 | return; | |
992 | ||
993 | case O_uminus: opname = "-"; break; | |
994 | case O_bit_not: opname = "~"; break; | |
995 | case O_logical_not: opname = "!"; break; | |
996 | case O_multiply: opname = "*"; break; | |
997 | case O_divide: opname = "/"; break; | |
998 | case O_modulus: opname = "%"; break; | |
999 | case O_left_shift: opname = "<<"; break; | |
1000 | case O_right_shift: opname = ">>"; break; | |
1001 | case O_bit_inclusive_or: opname = "|"; break; | |
1002 | case O_bit_or_not: opname = "|~"; break; | |
1003 | case O_bit_exclusive_or: opname = "^"; break; | |
1004 | case O_bit_and: opname = "&"; break; | |
1005 | case O_add: opname = "+"; break; | |
1006 | case O_subtract: opname = "-"; break; | |
1007 | case O_eq: opname = "=="; break; | |
1008 | case O_ne: opname = "!="; break; | |
1009 | case O_lt: opname = "<"; break; | |
1010 | case O_le: opname = "<="; break; | |
1011 | case O_ge: opname = ">="; break; | |
1012 | case O_gt: opname = ">"; break; | |
1013 | case O_logical_and: opname = "&&"; break; | |
1014 | case O_logical_or: opname = "||"; break; | |
1015 | } | |
1d3b2b27 | 1016 | |
0909233e AM |
1017 | if (expr_symbol_where (symp, &file, &line)) |
1018 | { | |
5a0ade8b | 1019 | if (left) |
0909233e | 1020 | as_bad_where (file, line, |
5a0ade8b AM |
1021 | _("invalid operands (%s and %s sections) for `%s'"), |
1022 | seg_left->name, seg_right->name, opname); | |
1023 | else | |
0909233e | 1024 | as_bad_where (file, line, |
5a0ade8b AM |
1025 | _("invalid operand (%s section) for `%s'"), |
1026 | seg_right->name, opname); | |
0909233e AM |
1027 | } |
1028 | else | |
1029 | { | |
5a0ade8b AM |
1030 | const char *sname = S_GET_NAME (symp); |
1031 | ||
1032 | if (left) | |
1033 | as_bad (_("invalid operands (%s and %s sections) for `%s' when setting `%s'"), | |
1034 | seg_left->name, seg_right->name, opname, sname); | |
1035 | else | |
1036 | as_bad (_("invalid operand (%s section) for `%s' when setting `%s'"), | |
1037 | seg_right->name, opname, sname); | |
0909233e AM |
1038 | } |
1039 | } | |
1040 | ||
252b5132 RH |
1041 | /* Resolve the value of a symbol. This is called during the final |
1042 | pass over the symbol table to resolve any symbols with complex | |
1043 | values. */ | |
1044 | ||
1045 | valueT | |
74937d39 | 1046 | resolve_symbol_value (symbolS *symp) |
252b5132 RH |
1047 | { |
1048 | int resolved; | |
03e83a45 | 1049 | valueT final_val = 0; |
252b5132 RH |
1050 | segT final_seg; |
1051 | ||
49309057 ILT |
1052 | if (LOCAL_SYMBOL_CHECK (symp)) |
1053 | { | |
1054 | struct local_symbol *locsym = (struct local_symbol *) symp; | |
1055 | ||
bd780143 | 1056 | final_val = locsym->lsy_value; |
49309057 | 1057 | if (local_symbol_resolved_p (locsym)) |
bd780143 | 1058 | return final_val; |
49309057 | 1059 | |
bd780143 | 1060 | final_val += local_symbol_get_frag (locsym)->fr_address / OCTETS_PER_BYTE; |
49309057 | 1061 | |
6386f3a7 | 1062 | if (finalize_syms) |
49309057 | 1063 | { |
bd780143 | 1064 | locsym->lsy_value = final_val; |
49309057 ILT |
1065 | local_symbol_mark_resolved (locsym); |
1066 | } | |
1067 | ||
1068 | return final_val; | |
1069 | } | |
1070 | ||
158184ac | 1071 | if (symp->sy_flags.sy_resolved) |
252b5132 RH |
1072 | { |
1073 | if (symp->sy_value.X_op == O_constant) | |
1074 | return (valueT) symp->sy_value.X_add_number; | |
1075 | else | |
1076 | return 0; | |
1077 | } | |
1078 | ||
1079 | resolved = 0; | |
1080 | final_seg = S_GET_SEGMENT (symp); | |
1081 | ||
158184ac | 1082 | if (symp->sy_flags.sy_resolving) |
252b5132 | 1083 | { |
6386f3a7 | 1084 | if (finalize_syms) |
0e389e77 | 1085 | as_bad (_("symbol definition loop encountered at `%s'"), |
7c743825 | 1086 | S_GET_NAME (symp)); |
252b5132 RH |
1087 | final_val = 0; |
1088 | resolved = 1; | |
1089 | } | |
280d71bf DB |
1090 | #ifdef OBJ_COMPLEX_RELC |
1091 | else if (final_seg == expr_section | |
1092 | && use_complex_relocs_for (symp)) | |
1093 | { | |
1094 | symbolS * relc_symbol = NULL; | |
1095 | char * relc_symbol_name = NULL; | |
1096 | ||
1097 | relc_symbol_name = symbol_relc_make_expr (& symp->sy_value); | |
1098 | ||
1099 | /* For debugging, print out conversion input & output. */ | |
1100 | #ifdef DEBUG_SYMS | |
1101 | print_expr (& symp->sy_value); | |
1102 | if (relc_symbol_name) | |
1103 | fprintf (stderr, "-> relc symbol: %s\n", relc_symbol_name); | |
1104 | #endif | |
1105 | ||
1106 | if (relc_symbol_name != NULL) | |
1107 | relc_symbol = symbol_new (relc_symbol_name, undefined_section, | |
1108 | 0, & zero_address_frag); | |
1109 | ||
1110 | if (relc_symbol == NULL) | |
1111 | { | |
1112 | as_bad (_("cannot convert expression symbol %s to complex relocation"), | |
1113 | S_GET_NAME (symp)); | |
1114 | resolved = 0; | |
1115 | } | |
1116 | else | |
1117 | { | |
1118 | symbol_table_insert (relc_symbol); | |
1119 | ||
1120 | /* S_CLEAR_EXTERNAL (relc_symbol); */ | |
1121 | if (symp->bsym->flags & BSF_SRELC) | |
1122 | relc_symbol->bsym->flags |= BSF_SRELC; | |
1123 | else | |
34bca508 | 1124 | relc_symbol->bsym->flags |= BSF_RELC; |
280d71bf DB |
1125 | /* symp->bsym->flags |= BSF_RELC; */ |
1126 | copy_symbol_attributes (symp, relc_symbol); | |
1127 | symp->sy_value.X_op = O_symbol; | |
1128 | symp->sy_value.X_add_symbol = relc_symbol; | |
1129 | symp->sy_value.X_add_number = 0; | |
1130 | resolved = 1; | |
1131 | } | |
1132 | ||
1133 | final_seg = undefined_section; | |
1134 | goto exit_dont_set_value; | |
1135 | } | |
1136 | #endif | |
252b5132 RH |
1137 | else |
1138 | { | |
1139 | symbolS *add_symbol, *op_symbol; | |
1140 | offsetT left, right; | |
1141 | segT seg_left, seg_right; | |
1142 | operatorT op; | |
2d034539 | 1143 | int move_seg_ok; |
252b5132 | 1144 | |
158184ac | 1145 | symp->sy_flags.sy_resolving = 1; |
252b5132 RH |
1146 | |
1147 | /* Help out with CSE. */ | |
1148 | add_symbol = symp->sy_value.X_add_symbol; | |
1149 | op_symbol = symp->sy_value.X_op_symbol; | |
1150 | final_val = symp->sy_value.X_add_number; | |
1151 | op = symp->sy_value.X_op; | |
1152 | ||
1153 | switch (op) | |
1154 | { | |
1155 | default: | |
1156 | BAD_CASE (op); | |
1157 | break; | |
1158 | ||
1159 | case O_absent: | |
1160 | final_val = 0; | |
1161 | /* Fall through. */ | |
1162 | ||
1163 | case O_constant: | |
bea9907b | 1164 | final_val += symp->sy_frag->fr_address / OCTETS_PER_BYTE; |
252b5132 RH |
1165 | if (final_seg == expr_section) |
1166 | final_seg = absolute_section; | |
db557034 AM |
1167 | /* Fall through. */ |
1168 | ||
1169 | case O_register: | |
252b5132 RH |
1170 | resolved = 1; |
1171 | break; | |
1172 | ||
1173 | case O_symbol: | |
1174 | case O_symbol_rva: | |
6386f3a7 | 1175 | left = resolve_symbol_value (add_symbol); |
e0890092 AM |
1176 | seg_left = S_GET_SEGMENT (add_symbol); |
1177 | if (finalize_syms) | |
1178 | symp->sy_value.X_op_symbol = NULL; | |
252b5132 | 1179 | |
e0890092 | 1180 | do_symbol: |
06e77878 AO |
1181 | if (S_IS_WEAKREFR (symp)) |
1182 | { | |
9c2799c2 | 1183 | gas_assert (final_val == 0); |
06e77878 AO |
1184 | if (S_IS_WEAKREFR (add_symbol)) |
1185 | { | |
9c2799c2 | 1186 | gas_assert (add_symbol->sy_value.X_op == O_symbol |
06e77878 AO |
1187 | && add_symbol->sy_value.X_add_number == 0); |
1188 | add_symbol = add_symbol->sy_value.X_add_symbol; | |
9c2799c2 | 1189 | gas_assert (! S_IS_WEAKREFR (add_symbol)); |
06e77878 AO |
1190 | symp->sy_value.X_add_symbol = add_symbol; |
1191 | } | |
1192 | } | |
1193 | ||
158184ac | 1194 | if (symp->sy_flags.sy_mri_common) |
252b5132 RH |
1195 | { |
1196 | /* This is a symbol inside an MRI common section. The | |
e0890092 AM |
1197 | relocation routines are going to handle it specially. |
1198 | Don't change the value. */ | |
49309057 | 1199 | resolved = symbol_resolved_p (add_symbol); |
252b5132 RH |
1200 | break; |
1201 | } | |
1202 | ||
6386f3a7 | 1203 | if (finalize_syms && final_val == 0) |
49309057 ILT |
1204 | { |
1205 | if (LOCAL_SYMBOL_CHECK (add_symbol)) | |
1206 | add_symbol = local_symbol_convert ((struct local_symbol *) | |
1207 | add_symbol); | |
1208 | copy_symbol_attributes (symp, add_symbol); | |
1209 | } | |
252b5132 | 1210 | |
e0890092 AM |
1211 | /* If we have equated this symbol to an undefined or common |
1212 | symbol, keep X_op set to O_symbol, and don't change | |
1213 | X_add_number. This permits the routine which writes out | |
1214 | relocation to detect this case, and convert the | |
1215 | relocation to be against the symbol to which this symbol | |
1216 | is equated. */ | |
977cdf5a | 1217 | if (! S_IS_DEFINED (add_symbol) |
7be1c489 | 1218 | #if defined (OBJ_COFF) && defined (TE_PE) |
977cdf5a NC |
1219 | || S_IS_WEAK (add_symbol) |
1220 | #endif | |
1221 | || S_IS_COMMON (add_symbol)) | |
252b5132 | 1222 | { |
6386f3a7 | 1223 | if (finalize_syms) |
252b5132 | 1224 | { |
252b5132 RH |
1225 | symp->sy_value.X_op = O_symbol; |
1226 | symp->sy_value.X_add_symbol = add_symbol; | |
1227 | symp->sy_value.X_add_number = final_val; | |
e0890092 AM |
1228 | /* Use X_op_symbol as a flag. */ |
1229 | symp->sy_value.X_op_symbol = add_symbol; | |
252b5132 | 1230 | } |
5a0ade8b | 1231 | final_seg = seg_left; |
252b5132 | 1232 | final_val = 0; |
49309057 | 1233 | resolved = symbol_resolved_p (add_symbol); |
158184ac | 1234 | symp->sy_flags.sy_resolving = 0; |
252b5132 RH |
1235 | goto exit_dont_set_value; |
1236 | } | |
0023dd27 AM |
1237 | else if (finalize_syms |
1238 | && ((final_seg == expr_section && seg_left != expr_section) | |
1239 | || symbol_shadow_p (symp))) | |
e0890092 AM |
1240 | { |
1241 | /* If the symbol is an expression symbol, do similarly | |
1242 | as for undefined and common syms above. Handles | |
1243 | "sym +/- expr" where "expr" cannot be evaluated | |
1244 | immediately, and we want relocations to be against | |
1245 | "sym", eg. because it is weak. */ | |
1246 | symp->sy_value.X_op = O_symbol; | |
1247 | symp->sy_value.X_add_symbol = add_symbol; | |
1248 | symp->sy_value.X_add_number = final_val; | |
1249 | symp->sy_value.X_op_symbol = add_symbol; | |
1250 | final_seg = seg_left; | |
1251 | final_val += symp->sy_frag->fr_address + left; | |
1252 | resolved = symbol_resolved_p (add_symbol); | |
158184ac | 1253 | symp->sy_flags.sy_resolving = 0; |
e0890092 AM |
1254 | goto exit_dont_set_value; |
1255 | } | |
252b5132 RH |
1256 | else |
1257 | { | |
1258 | final_val += symp->sy_frag->fr_address + left; | |
1259 | if (final_seg == expr_section || final_seg == undefined_section) | |
e0890092 | 1260 | final_seg = seg_left; |
252b5132 RH |
1261 | } |
1262 | ||
49309057 | 1263 | resolved = symbol_resolved_p (add_symbol); |
06e77878 | 1264 | if (S_IS_WEAKREFR (symp)) |
22987cec AM |
1265 | { |
1266 | symp->sy_flags.sy_resolving = 0; | |
1267 | goto exit_dont_set_value; | |
1268 | } | |
252b5132 RH |
1269 | break; |
1270 | ||
1271 | case O_uminus: | |
1272 | case O_bit_not: | |
1273 | case O_logical_not: | |
6386f3a7 | 1274 | left = resolve_symbol_value (add_symbol); |
784b640d | 1275 | seg_left = S_GET_SEGMENT (add_symbol); |
252b5132 | 1276 | |
0909233e AM |
1277 | /* By reducing these to the relevant dyadic operator, we get |
1278 | !S -> S == 0 permitted on anything, | |
1279 | -S -> 0 - S only permitted on absolute | |
1280 | ~S -> S ^ ~0 only permitted on absolute */ | |
1281 | if (op != O_logical_not && seg_left != absolute_section | |
1282 | && finalize_syms) | |
5a0ade8b | 1283 | report_op_error (symp, NULL, op, add_symbol); |
1d3b2b27 | 1284 | |
0909233e AM |
1285 | if (final_seg == expr_section || final_seg == undefined_section) |
1286 | final_seg = absolute_section; | |
1d3b2b27 | 1287 | |
252b5132 RH |
1288 | if (op == O_uminus) |
1289 | left = -left; | |
1290 | else if (op == O_logical_not) | |
1291 | left = !left; | |
1292 | else | |
1293 | left = ~left; | |
1294 | ||
1295 | final_val += left + symp->sy_frag->fr_address; | |
252b5132 | 1296 | |
49309057 | 1297 | resolved = symbol_resolved_p (add_symbol); |
252b5132 RH |
1298 | break; |
1299 | ||
1300 | case O_multiply: | |
1301 | case O_divide: | |
1302 | case O_modulus: | |
1303 | case O_left_shift: | |
1304 | case O_right_shift: | |
1305 | case O_bit_inclusive_or: | |
1306 | case O_bit_or_not: | |
1307 | case O_bit_exclusive_or: | |
1308 | case O_bit_and: | |
1309 | case O_add: | |
1310 | case O_subtract: | |
1311 | case O_eq: | |
1312 | case O_ne: | |
1313 | case O_lt: | |
1314 | case O_le: | |
1315 | case O_ge: | |
1316 | case O_gt: | |
1317 | case O_logical_and: | |
1318 | case O_logical_or: | |
6386f3a7 AM |
1319 | left = resolve_symbol_value (add_symbol); |
1320 | right = resolve_symbol_value (op_symbol); | |
252b5132 RH |
1321 | seg_left = S_GET_SEGMENT (add_symbol); |
1322 | seg_right = S_GET_SEGMENT (op_symbol); | |
1323 | ||
1324 | /* Simplify addition or subtraction of a constant by folding the | |
1325 | constant into X_add_number. */ | |
e0890092 | 1326 | if (op == O_add) |
252b5132 RH |
1327 | { |
1328 | if (seg_right == absolute_section) | |
1329 | { | |
e0890092 | 1330 | final_val += right; |
252b5132 RH |
1331 | goto do_symbol; |
1332 | } | |
e0890092 | 1333 | else if (seg_left == absolute_section) |
252b5132 | 1334 | { |
252b5132 RH |
1335 | final_val += left; |
1336 | add_symbol = op_symbol; | |
1337 | left = right; | |
e0890092 AM |
1338 | seg_left = seg_right; |
1339 | goto do_symbol; | |
1340 | } | |
1341 | } | |
1342 | else if (op == O_subtract) | |
1343 | { | |
1344 | if (seg_right == absolute_section) | |
1345 | { | |
1346 | final_val -= right; | |
252b5132 RH |
1347 | goto do_symbol; |
1348 | } | |
1349 | } | |
1350 | ||
2d034539 | 1351 | move_seg_ok = 1; |
e0890092 AM |
1352 | /* Equality and non-equality tests are permitted on anything. |
1353 | Subtraction, and other comparison operators are permitted if | |
1354 | both operands are in the same section. Otherwise, both | |
1355 | operands must be absolute. We already handled the case of | |
1356 | addition or subtraction of a constant above. This will | |
1357 | probably need to be changed for an object file format which | |
2d034539 NC |
1358 | supports arbitrary expressions, such as IEEE-695. */ |
1359 | if (!(seg_left == absolute_section | |
5a0ade8b | 1360 | && seg_right == absolute_section) |
0909233e AM |
1361 | && !(op == O_eq || op == O_ne) |
1362 | && !((op == O_subtract | |
1363 | || op == O_lt || op == O_le || op == O_ge || op == O_gt) | |
1364 | && seg_left == seg_right | |
1365 | && (seg_left != undefined_section | |
1366 | || add_symbol == op_symbol))) | |
2d034539 NC |
1367 | { |
1368 | /* Don't emit messages unless we're finalizing the symbol value, | |
1369 | otherwise we may get the same message multiple times. */ | |
1370 | if (finalize_syms) | |
5a0ade8b | 1371 | report_op_error (symp, add_symbol, op, op_symbol); |
2d034539 NC |
1372 | /* However do not move the symbol into the absolute section |
1373 | if it cannot currently be resolved - this would confuse | |
1374 | other parts of the assembler into believing that the | |
1375 | expression had been evaluated to zero. */ | |
1376 | else | |
1377 | move_seg_ok = 0; | |
1378 | } | |
1d3b2b27 | 1379 | |
2d034539 NC |
1380 | if (move_seg_ok |
1381 | && (final_seg == expr_section || final_seg == undefined_section)) | |
0909233e | 1382 | final_seg = absolute_section; |
252b5132 RH |
1383 | |
1384 | /* Check for division by zero. */ | |
1385 | if ((op == O_divide || op == O_modulus) && right == 0) | |
1386 | { | |
1387 | /* If seg_right is not absolute_section, then we've | |
e0890092 | 1388 | already issued a warning about using a bad symbol. */ |
6386f3a7 | 1389 | if (seg_right == absolute_section && finalize_syms) |
252b5132 | 1390 | { |
3b4dbbbf | 1391 | const char *file; |
252b5132 RH |
1392 | unsigned int line; |
1393 | ||
1394 | if (expr_symbol_where (symp, &file, &line)) | |
1395 | as_bad_where (file, line, _("division by zero")); | |
1396 | else | |
0e389e77 | 1397 | as_bad (_("division by zero when setting `%s'"), |
252b5132 RH |
1398 | S_GET_NAME (symp)); |
1399 | } | |
1400 | ||
1401 | right = 1; | |
1402 | } | |
1403 | ||
1404 | switch (symp->sy_value.X_op) | |
1405 | { | |
1406 | case O_multiply: left *= right; break; | |
1407 | case O_divide: left /= right; break; | |
1408 | case O_modulus: left %= right; break; | |
1409 | case O_left_shift: left <<= right; break; | |
1410 | case O_right_shift: left >>= right; break; | |
1411 | case O_bit_inclusive_or: left |= right; break; | |
1412 | case O_bit_or_not: left |= ~right; break; | |
1413 | case O_bit_exclusive_or: left ^= right; break; | |
1414 | case O_bit_and: left &= right; break; | |
1415 | case O_add: left += right; break; | |
1416 | case O_subtract: left -= right; break; | |
e0890092 AM |
1417 | case O_eq: |
1418 | case O_ne: | |
1419 | left = (left == right && seg_left == seg_right | |
1420 | && (seg_left != undefined_section | |
1421 | || add_symbol == op_symbol) | |
1422 | ? ~ (offsetT) 0 : 0); | |
1423 | if (symp->sy_value.X_op == O_ne) | |
1424 | left = ~left; | |
1425 | break; | |
252b5132 RH |
1426 | case O_lt: left = left < right ? ~ (offsetT) 0 : 0; break; |
1427 | case O_le: left = left <= right ? ~ (offsetT) 0 : 0; break; | |
1428 | case O_ge: left = left >= right ? ~ (offsetT) 0 : 0; break; | |
1429 | case O_gt: left = left > right ? ~ (offsetT) 0 : 0; break; | |
1430 | case O_logical_and: left = left && right; break; | |
1431 | case O_logical_or: left = left || right; break; | |
6d6ad65b NC |
1432 | |
1433 | case O_illegal: | |
1434 | case O_absent: | |
1435 | case O_constant: | |
1436 | /* See PR 20895 for a reproducer. */ | |
1437 | as_bad (_("Invalid operation on symbol")); | |
1438 | goto exit_dont_set_value; | |
1439 | ||
1440 | default: | |
1441 | abort (); | |
252b5132 RH |
1442 | } |
1443 | ||
1444 | final_val += symp->sy_frag->fr_address + left; | |
1445 | if (final_seg == expr_section || final_seg == undefined_section) | |
784b640d AM |
1446 | { |
1447 | if (seg_left == undefined_section | |
1448 | || seg_right == undefined_section) | |
1449 | final_seg = undefined_section; | |
1450 | else if (seg_left == absolute_section) | |
1451 | final_seg = seg_right; | |
1452 | else | |
1453 | final_seg = seg_left; | |
1454 | } | |
49309057 ILT |
1455 | resolved = (symbol_resolved_p (add_symbol) |
1456 | && symbol_resolved_p (op_symbol)); | |
7c743825 | 1457 | break; |
252b5132 | 1458 | |
252b5132 RH |
1459 | case O_big: |
1460 | case O_illegal: | |
1461 | /* Give an error (below) if not in expr_section. We don't | |
1462 | want to worry about expr_section symbols, because they | |
1463 | are fictional (they are created as part of expression | |
1464 | resolution), and any problems may not actually mean | |
1465 | anything. */ | |
1466 | break; | |
1467 | } | |
1468 | ||
158184ac | 1469 | symp->sy_flags.sy_resolving = 0; |
252b5132 RH |
1470 | } |
1471 | ||
6386f3a7 | 1472 | if (finalize_syms) |
05bdb37e | 1473 | S_SET_VALUE (symp, final_val); |
252b5132 | 1474 | |
05bdb37e AM |
1475 | exit_dont_set_value: |
1476 | /* Always set the segment, even if not finalizing the value. | |
1477 | The segment is used to determine whether a symbol is defined. */ | |
05bdb37e | 1478 | S_SET_SEGMENT (symp, final_seg); |
252b5132 | 1479 | |
252b5132 | 1480 | /* Don't worry if we can't resolve an expr_section symbol. */ |
6386f3a7 | 1481 | if (finalize_syms) |
252b5132 RH |
1482 | { |
1483 | if (resolved) | |
158184ac | 1484 | symp->sy_flags.sy_resolved = 1; |
252b5132 RH |
1485 | else if (S_GET_SEGMENT (symp) != expr_section) |
1486 | { | |
0e389e77 | 1487 | as_bad (_("can't resolve value for symbol `%s'"), |
7c743825 | 1488 | S_GET_NAME (symp)); |
158184ac | 1489 | symp->sy_flags.sy_resolved = 1; |
252b5132 RH |
1490 | } |
1491 | } | |
1492 | ||
1493 | return final_val; | |
1494 | } | |
1495 | ||
5a49b8ac | 1496 | static void resolve_local_symbol (const char *, void *); |
49309057 ILT |
1497 | |
1498 | /* A static function passed to hash_traverse. */ | |
1499 | ||
1500 | static void | |
5a49b8ac | 1501 | resolve_local_symbol (const char *key ATTRIBUTE_UNUSED, void *value) |
49309057 ILT |
1502 | { |
1503 | if (value != NULL) | |
1e9cc1c2 | 1504 | resolve_symbol_value ((symbolS *) value); |
49309057 ILT |
1505 | } |
1506 | ||
49309057 ILT |
1507 | /* Resolve all local symbols. */ |
1508 | ||
1509 | void | |
74937d39 | 1510 | resolve_local_symbol_values (void) |
49309057 | 1511 | { |
49309057 | 1512 | hash_traverse (local_hash, resolve_local_symbol); |
49309057 ILT |
1513 | } |
1514 | ||
9497f5ac NC |
1515 | /* Obtain the current value of a symbol without changing any |
1516 | sub-expressions used. */ | |
1517 | ||
1518 | int | |
2e1e12b1 | 1519 | snapshot_symbol (symbolS **symbolPP, valueT *valueP, segT *segP, fragS **fragPP) |
9497f5ac | 1520 | { |
2e1e12b1 JB |
1521 | symbolS *symbolP = *symbolPP; |
1522 | ||
9497f5ac NC |
1523 | if (LOCAL_SYMBOL_CHECK (symbolP)) |
1524 | { | |
1525 | struct local_symbol *locsym = (struct local_symbol *) symbolP; | |
1526 | ||
1527 | *valueP = locsym->lsy_value; | |
1528 | *segP = locsym->lsy_section; | |
1529 | *fragPP = local_symbol_get_frag (locsym); | |
1530 | } | |
1531 | else | |
1532 | { | |
91d6fa6a | 1533 | expressionS exp = symbolP->sy_value; |
9497f5ac | 1534 | |
158184ac | 1535 | if (!symbolP->sy_flags.sy_resolved && exp.X_op != O_illegal) |
9497f5ac NC |
1536 | { |
1537 | int resolved; | |
1538 | ||
158184ac | 1539 | if (symbolP->sy_flags.sy_resolving) |
9497f5ac | 1540 | return 0; |
158184ac | 1541 | symbolP->sy_flags.sy_resolving = 1; |
91d6fa6a | 1542 | resolved = resolve_expression (&exp); |
158184ac | 1543 | symbolP->sy_flags.sy_resolving = 0; |
9497f5ac NC |
1544 | if (!resolved) |
1545 | return 0; | |
1546 | ||
91d6fa6a | 1547 | switch (exp.X_op) |
9497f5ac NC |
1548 | { |
1549 | case O_constant: | |
1550 | case O_register: | |
2e1e12b1 | 1551 | if (!symbol_equated_p (symbolP)) |
9497f5ac | 1552 | break; |
2b0f3761 | 1553 | /* Fallthru. */ |
9497f5ac NC |
1554 | case O_symbol: |
1555 | case O_symbol_rva: | |
91d6fa6a | 1556 | symbolP = exp.X_add_symbol; |
9497f5ac NC |
1557 | break; |
1558 | default: | |
1559 | return 0; | |
1560 | } | |
1561 | } | |
1562 | ||
d96eea71 | 1563 | *symbolPP = symbolP; |
e78bb25c NC |
1564 | |
1565 | /* A bogus input file can result in resolve_expression() | |
1566 | generating a local symbol, so we have to check again. */ | |
1567 | if (LOCAL_SYMBOL_CHECK (symbolP)) | |
1568 | { | |
1569 | struct local_symbol *locsym = (struct local_symbol *) symbolP; | |
1570 | ||
1571 | *valueP = locsym->lsy_value; | |
1572 | *segP = locsym->lsy_section; | |
1573 | *fragPP = local_symbol_get_frag (locsym); | |
1574 | } | |
1575 | else | |
1576 | { | |
1577 | *valueP = exp.X_add_number; | |
1578 | *segP = symbolP->bsym->section; | |
1579 | *fragPP = symbolP->sy_frag; | |
1580 | } | |
9497f5ac NC |
1581 | |
1582 | if (*segP == expr_section) | |
91d6fa6a | 1583 | switch (exp.X_op) |
9497f5ac NC |
1584 | { |
1585 | case O_constant: *segP = absolute_section; break; | |
1586 | case O_register: *segP = reg_section; break; | |
1587 | default: break; | |
1588 | } | |
1589 | } | |
1590 | ||
1591 | return 1; | |
1592 | } | |
1593 | ||
252b5132 RH |
1594 | /* Dollar labels look like a number followed by a dollar sign. Eg, "42$". |
1595 | They are *really* local. That is, they go out of scope whenever we see a | |
1596 | label that isn't local. Also, like fb labels, there can be multiple | |
1597 | instances of a dollar label. Therefor, we name encode each instance with | |
1598 | the instance number, keep a list of defined symbols separate from the real | |
1599 | symbol table, and we treat these buggers as a sparse array. */ | |
1600 | ||
1601 | static long *dollar_labels; | |
1602 | static long *dollar_label_instances; | |
1603 | static char *dollar_label_defines; | |
1604 | static unsigned long dollar_label_count; | |
1605 | static unsigned long dollar_label_max; | |
1606 | ||
7c743825 | 1607 | int |
74937d39 | 1608 | dollar_label_defined (long label) |
252b5132 RH |
1609 | { |
1610 | long *i; | |
1611 | ||
1612 | know ((dollar_labels != NULL) || (dollar_label_count == 0)); | |
1613 | ||
1614 | for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) | |
1615 | if (*i == label) | |
1616 | return dollar_label_defines[i - dollar_labels]; | |
1617 | ||
7c743825 | 1618 | /* If we get here, label isn't defined. */ |
252b5132 | 1619 | return 0; |
7c743825 | 1620 | } |
252b5132 RH |
1621 | |
1622 | static long | |
74937d39 | 1623 | dollar_label_instance (long label) |
252b5132 RH |
1624 | { |
1625 | long *i; | |
1626 | ||
1627 | know ((dollar_labels != NULL) || (dollar_label_count == 0)); | |
1628 | ||
1629 | for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) | |
1630 | if (*i == label) | |
1631 | return (dollar_label_instances[i - dollar_labels]); | |
1632 | ||
7c743825 KH |
1633 | /* If we get here, we haven't seen the label before. |
1634 | Therefore its instance count is zero. */ | |
252b5132 RH |
1635 | return 0; |
1636 | } | |
1637 | ||
7c743825 | 1638 | void |
74937d39 | 1639 | dollar_label_clear (void) |
252b5132 RH |
1640 | { |
1641 | memset (dollar_label_defines, '\0', (unsigned int) dollar_label_count); | |
1642 | } | |
1643 | ||
1644 | #define DOLLAR_LABEL_BUMP_BY 10 | |
1645 | ||
7c743825 | 1646 | void |
74937d39 | 1647 | define_dollar_label (long label) |
252b5132 RH |
1648 | { |
1649 | long *i; | |
1650 | ||
1651 | for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) | |
1652 | if (*i == label) | |
1653 | { | |
1654 | ++dollar_label_instances[i - dollar_labels]; | |
1655 | dollar_label_defines[i - dollar_labels] = 1; | |
1656 | return; | |
1657 | } | |
1658 | ||
7c743825 | 1659 | /* If we get to here, we don't have label listed yet. */ |
252b5132 RH |
1660 | |
1661 | if (dollar_labels == NULL) | |
1662 | { | |
325801bd TS |
1663 | dollar_labels = XNEWVEC (long, DOLLAR_LABEL_BUMP_BY); |
1664 | dollar_label_instances = XNEWVEC (long, DOLLAR_LABEL_BUMP_BY); | |
add39d23 | 1665 | dollar_label_defines = XNEWVEC (char, DOLLAR_LABEL_BUMP_BY); |
252b5132 RH |
1666 | dollar_label_max = DOLLAR_LABEL_BUMP_BY; |
1667 | dollar_label_count = 0; | |
1668 | } | |
1669 | else if (dollar_label_count == dollar_label_max) | |
1670 | { | |
1671 | dollar_label_max += DOLLAR_LABEL_BUMP_BY; | |
325801bd TS |
1672 | dollar_labels = XRESIZEVEC (long, dollar_labels, dollar_label_max); |
1673 | dollar_label_instances = XRESIZEVEC (long, dollar_label_instances, | |
1674 | dollar_label_max); | |
add39d23 TS |
1675 | dollar_label_defines = XRESIZEVEC (char, dollar_label_defines, |
1676 | dollar_label_max); | |
7c743825 | 1677 | } /* if we needed to grow */ |
252b5132 RH |
1678 | |
1679 | dollar_labels[dollar_label_count] = label; | |
1680 | dollar_label_instances[dollar_label_count] = 1; | |
1681 | dollar_label_defines[dollar_label_count] = 1; | |
1682 | ++dollar_label_count; | |
1683 | } | |
1684 | ||
7c743825 KH |
1685 | /* Caller must copy returned name: we re-use the area for the next name. |
1686 | ||
2b0f3761 | 1687 | The mth occurrence of label n: is turned into the symbol "Ln^Am" |
7c743825 KH |
1688 | where n is the label number and m is the instance number. "L" makes |
1689 | it a label discarded unless debugging and "^A"('\1') ensures no | |
1690 | ordinary symbol SHOULD get the same name as a local label | |
1691 | symbol. The first "4:" is "L4^A1" - the m numbers begin at 1. | |
1692 | ||
1693 | fb labels get the same treatment, except that ^B is used in place | |
1694 | of ^A. */ | |
1695 | ||
1696 | char * /* Return local label name. */ | |
ed9e98c2 AM |
1697 | dollar_label_name (long n, /* we just saw "n$:" : n a number. */ |
1698 | int augend /* 0 for current instance, 1 for new instance. */) | |
252b5132 RH |
1699 | { |
1700 | long i; | |
7c743825 | 1701 | /* Returned to caller, then copied. Used for created names ("4f"). */ |
252b5132 | 1702 | static char symbol_name_build[24]; |
ed9e98c2 AM |
1703 | char *p; |
1704 | char *q; | |
7c743825 | 1705 | char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */ |
252b5132 RH |
1706 | |
1707 | know (n >= 0); | |
1708 | know (augend == 0 || augend == 1); | |
1709 | p = symbol_name_build; | |
f84dd1f0 NC |
1710 | #ifdef LOCAL_LABEL_PREFIX |
1711 | *p++ = LOCAL_LABEL_PREFIX; | |
1712 | #endif | |
252b5132 RH |
1713 | *p++ = 'L'; |
1714 | ||
7c743825 KH |
1715 | /* Next code just does sprintf( {}, "%d", n); */ |
1716 | /* Label number. */ | |
252b5132 RH |
1717 | q = symbol_name_temporary; |
1718 | for (*q++ = 0, i = n; i; ++q) | |
1719 | { | |
1720 | *q = i % 10 + '0'; | |
1721 | i /= 10; | |
1722 | } | |
1723 | while ((*p = *--q) != '\0') | |
1724 | ++p; | |
1725 | ||
aa257fcd | 1726 | *p++ = DOLLAR_LABEL_CHAR; /* ^A */ |
252b5132 | 1727 | |
7c743825 | 1728 | /* Instance number. */ |
252b5132 RH |
1729 | q = symbol_name_temporary; |
1730 | for (*q++ = 0, i = dollar_label_instance (n) + augend; i; ++q) | |
1731 | { | |
1732 | *q = i % 10 + '0'; | |
1733 | i /= 10; | |
1734 | } | |
5bb3703f | 1735 | while ((*p++ = *--q) != '\0'); |
252b5132 | 1736 | |
7c743825 | 1737 | /* The label, as a '\0' ended string, starts at symbol_name_build. */ |
252b5132 RH |
1738 | return symbol_name_build; |
1739 | } | |
1740 | ||
47eebc20 | 1741 | /* Somebody else's idea of local labels. They are made by "n:" where n |
7c743825 KH |
1742 | is any decimal digit. Refer to them with |
1743 | "nb" for previous (backward) n: | |
1744 | or "nf" for next (forward) n:. | |
1745 | ||
1746 | We do a little better and let n be any number, not just a single digit, but | |
1747 | since the other guy's assembler only does ten, we treat the first ten | |
1748 | specially. | |
1749 | ||
1750 | Like someone else's assembler, we have one set of local label counters for | |
1751 | entire assembly, not one set per (sub)segment like in most assemblers. This | |
1752 | implies that one can refer to a label in another segment, and indeed some | |
1753 | crufty compilers have done just that. | |
1754 | ||
1755 | Since there could be a LOT of these things, treat them as a sparse | |
1756 | array. */ | |
252b5132 RH |
1757 | |
1758 | #define FB_LABEL_SPECIAL (10) | |
1759 | ||
1760 | static long fb_low_counter[FB_LABEL_SPECIAL]; | |
1761 | static long *fb_labels; | |
1762 | static long *fb_label_instances; | |
1763 | static long fb_label_count; | |
1764 | static long fb_label_max; | |
1765 | ||
7c743825 | 1766 | /* This must be more than FB_LABEL_SPECIAL. */ |
252b5132 RH |
1767 | #define FB_LABEL_BUMP_BY (FB_LABEL_SPECIAL + 6) |
1768 | ||
7c743825 | 1769 | static void |
74937d39 | 1770 | fb_label_init (void) |
252b5132 RH |
1771 | { |
1772 | memset ((void *) fb_low_counter, '\0', sizeof (fb_low_counter)); | |
7c743825 | 1773 | } |
252b5132 | 1774 | |
7c743825 KH |
1775 | /* Add one to the instance number of this fb label. */ |
1776 | ||
1777 | void | |
74937d39 | 1778 | fb_label_instance_inc (long label) |
252b5132 RH |
1779 | { |
1780 | long *i; | |
1781 | ||
b4e6cb80 | 1782 | if ((unsigned long) label < FB_LABEL_SPECIAL) |
252b5132 RH |
1783 | { |
1784 | ++fb_low_counter[label]; | |
1785 | return; | |
1786 | } | |
1787 | ||
1788 | if (fb_labels != NULL) | |
1789 | { | |
1790 | for (i = fb_labels + FB_LABEL_SPECIAL; | |
1791 | i < fb_labels + fb_label_count; ++i) | |
1792 | { | |
1793 | if (*i == label) | |
1794 | { | |
1795 | ++fb_label_instances[i - fb_labels]; | |
1796 | return; | |
7c743825 KH |
1797 | } /* if we find it */ |
1798 | } /* for each existing label */ | |
252b5132 RH |
1799 | } |
1800 | ||
7c743825 | 1801 | /* If we get to here, we don't have label listed yet. */ |
252b5132 RH |
1802 | |
1803 | if (fb_labels == NULL) | |
1804 | { | |
325801bd TS |
1805 | fb_labels = XNEWVEC (long, FB_LABEL_BUMP_BY); |
1806 | fb_label_instances = XNEWVEC (long, FB_LABEL_BUMP_BY); | |
252b5132 RH |
1807 | fb_label_max = FB_LABEL_BUMP_BY; |
1808 | fb_label_count = FB_LABEL_SPECIAL; | |
1809 | ||
1810 | } | |
1811 | else if (fb_label_count == fb_label_max) | |
1812 | { | |
1813 | fb_label_max += FB_LABEL_BUMP_BY; | |
325801bd TS |
1814 | fb_labels = XRESIZEVEC (long, fb_labels, fb_label_max); |
1815 | fb_label_instances = XRESIZEVEC (long, fb_label_instances, fb_label_max); | |
7c743825 | 1816 | } /* if we needed to grow */ |
252b5132 RH |
1817 | |
1818 | fb_labels[fb_label_count] = label; | |
1819 | fb_label_instances[fb_label_count] = 1; | |
1820 | ++fb_label_count; | |
1821 | } | |
1822 | ||
7c743825 | 1823 | static long |
74937d39 | 1824 | fb_label_instance (long label) |
252b5132 RH |
1825 | { |
1826 | long *i; | |
1827 | ||
b4e6cb80 | 1828 | if ((unsigned long) label < FB_LABEL_SPECIAL) |
252b5132 RH |
1829 | { |
1830 | return (fb_low_counter[label]); | |
1831 | } | |
1832 | ||
1833 | if (fb_labels != NULL) | |
1834 | { | |
1835 | for (i = fb_labels + FB_LABEL_SPECIAL; | |
1836 | i < fb_labels + fb_label_count; ++i) | |
1837 | { | |
1838 | if (*i == label) | |
1839 | { | |
1840 | return (fb_label_instances[i - fb_labels]); | |
7c743825 KH |
1841 | } /* if we find it */ |
1842 | } /* for each existing label */ | |
252b5132 RH |
1843 | } |
1844 | ||
1845 | /* We didn't find the label, so this must be a reference to the | |
1846 | first instance. */ | |
1847 | return 0; | |
1848 | } | |
1849 | ||
7c743825 KH |
1850 | /* Caller must copy returned name: we re-use the area for the next name. |
1851 | ||
2b0f3761 | 1852 | The mth occurrence of label n: is turned into the symbol "Ln^Bm" |
7c743825 KH |
1853 | where n is the label number and m is the instance number. "L" makes |
1854 | it a label discarded unless debugging and "^B"('\2') ensures no | |
1855 | ordinary symbol SHOULD get the same name as a local label | |
1856 | symbol. The first "4:" is "L4^B1" - the m numbers begin at 1. | |
1857 | ||
1858 | dollar labels get the same treatment, except that ^A is used in | |
1859 | place of ^B. */ | |
1860 | ||
1861 | char * /* Return local label name. */ | |
74937d39 KH |
1862 | fb_label_name (long n, /* We just saw "n:", "nf" or "nb" : n a number. */ |
1863 | long augend /* 0 for nb, 1 for n:, nf. */) | |
252b5132 RH |
1864 | { |
1865 | long i; | |
7c743825 | 1866 | /* Returned to caller, then copied. Used for created names ("4f"). */ |
252b5132 | 1867 | static char symbol_name_build[24]; |
ed9e98c2 AM |
1868 | char *p; |
1869 | char *q; | |
7c743825 | 1870 | char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */ |
252b5132 RH |
1871 | |
1872 | know (n >= 0); | |
a76903bf | 1873 | #ifdef TC_MMIX |
71ba24a1 | 1874 | know ((unsigned long) augend <= 2 /* See mmix_fb_label. */); |
a76903bf | 1875 | #else |
71ba24a1 | 1876 | know ((unsigned long) augend <= 1); |
a76903bf | 1877 | #endif |
252b5132 | 1878 | p = symbol_name_build; |
aa257fcd NC |
1879 | #ifdef LOCAL_LABEL_PREFIX |
1880 | *p++ = LOCAL_LABEL_PREFIX; | |
1881 | #endif | |
252b5132 RH |
1882 | *p++ = 'L'; |
1883 | ||
7c743825 KH |
1884 | /* Next code just does sprintf( {}, "%d", n); */ |
1885 | /* Label number. */ | |
252b5132 RH |
1886 | q = symbol_name_temporary; |
1887 | for (*q++ = 0, i = n; i; ++q) | |
1888 | { | |
1889 | *q = i % 10 + '0'; | |
1890 | i /= 10; | |
1891 | } | |
1892 | while ((*p = *--q) != '\0') | |
1893 | ++p; | |
1894 | ||
aa257fcd | 1895 | *p++ = LOCAL_LABEL_CHAR; /* ^B */ |
252b5132 | 1896 | |
7c743825 | 1897 | /* Instance number. */ |
252b5132 RH |
1898 | q = symbol_name_temporary; |
1899 | for (*q++ = 0, i = fb_label_instance (n) + augend; i; ++q) | |
1900 | { | |
1901 | *q = i % 10 + '0'; | |
1902 | i /= 10; | |
1903 | } | |
5bb3703f | 1904 | while ((*p++ = *--q) != '\0'); |
252b5132 | 1905 | |
7c743825 | 1906 | /* The label, as a '\0' ended string, starts at symbol_name_build. */ |
252b5132 | 1907 | return (symbol_name_build); |
7c743825 | 1908 | } |
252b5132 | 1909 | |
7c743825 KH |
1910 | /* Decode name that may have been generated by foo_label_name() above. |
1911 | If the name wasn't generated by foo_label_name(), then return it | |
1912 | unaltered. This is used for error messages. */ | |
252b5132 RH |
1913 | |
1914 | char * | |
74937d39 | 1915 | decode_local_label_name (char *s) |
252b5132 RH |
1916 | { |
1917 | char *p; | |
1918 | char *symbol_decode; | |
1919 | int label_number; | |
1920 | int instance_number; | |
cd0bbe6e | 1921 | const char *type; |
d95767bf | 1922 | const char *message_format; |
91d6fa6a | 1923 | int lindex = 0; |
43ad3147 | 1924 | |
aa257fcd | 1925 | #ifdef LOCAL_LABEL_PREFIX |
91d6fa6a NC |
1926 | if (s[lindex] == LOCAL_LABEL_PREFIX) |
1927 | ++lindex; | |
aa257fcd | 1928 | #endif |
43ad3147 | 1929 | |
91d6fa6a | 1930 | if (s[lindex] != 'L') |
252b5132 RH |
1931 | return s; |
1932 | ||
91d6fa6a | 1933 | for (label_number = 0, p = s + lindex + 1; ISDIGIT (*p); ++p) |
252b5132 RH |
1934 | label_number = (10 * label_number) + *p - '0'; |
1935 | ||
aa257fcd | 1936 | if (*p == DOLLAR_LABEL_CHAR) |
252b5132 | 1937 | type = "dollar"; |
aa257fcd | 1938 | else if (*p == LOCAL_LABEL_CHAR) |
252b5132 RH |
1939 | type = "fb"; |
1940 | else | |
1941 | return s; | |
1942 | ||
3882b010 | 1943 | for (instance_number = 0, p++; ISDIGIT (*p); ++p) |
252b5132 RH |
1944 | instance_number = (10 * instance_number) + *p - '0'; |
1945 | ||
d95767bf | 1946 | message_format = _("\"%d\" (instance number %d of a %s label)"); |
1e9cc1c2 | 1947 | symbol_decode = (char *) obstack_alloc (¬es, strlen (message_format) + 30); |
252b5132 RH |
1948 | sprintf (symbol_decode, message_format, label_number, instance_number, type); |
1949 | ||
1950 | return symbol_decode; | |
1951 | } | |
1952 | ||
1953 | /* Get the value of a symbol. */ | |
1954 | ||
1955 | valueT | |
74937d39 | 1956 | S_GET_VALUE (symbolS *s) |
252b5132 | 1957 | { |
49309057 | 1958 | if (LOCAL_SYMBOL_CHECK (s)) |
ac62c346 | 1959 | return resolve_symbol_value (s); |
49309057 | 1960 | |
158184ac | 1961 | if (!s->sy_flags.sy_resolved) |
e46d99eb | 1962 | { |
6386f3a7 AM |
1963 | valueT val = resolve_symbol_value (s); |
1964 | if (!finalize_syms) | |
e46d99eb AM |
1965 | return val; |
1966 | } | |
06e77878 AO |
1967 | if (S_IS_WEAKREFR (s)) |
1968 | return S_GET_VALUE (s->sy_value.X_add_symbol); | |
1969 | ||
252b5132 RH |
1970 | if (s->sy_value.X_op != O_constant) |
1971 | { | |
158184ac | 1972 | if (! s->sy_flags.sy_resolved |
252b5132 RH |
1973 | || s->sy_value.X_op != O_symbol |
1974 | || (S_IS_DEFINED (s) && ! S_IS_COMMON (s))) | |
0e389e77 | 1975 | as_bad (_("attempt to get value of unresolved symbol `%s'"), |
252b5132 | 1976 | S_GET_NAME (s)); |
252b5132 RH |
1977 | } |
1978 | return (valueT) s->sy_value.X_add_number; | |
1979 | } | |
1980 | ||
1981 | /* Set the value of a symbol. */ | |
1982 | ||
1983 | void | |
74937d39 | 1984 | S_SET_VALUE (symbolS *s, valueT val) |
252b5132 | 1985 | { |
49309057 ILT |
1986 | if (LOCAL_SYMBOL_CHECK (s)) |
1987 | { | |
bd780143 | 1988 | ((struct local_symbol *) s)->lsy_value = val; |
49309057 ILT |
1989 | return; |
1990 | } | |
1991 | ||
252b5132 RH |
1992 | s->sy_value.X_op = O_constant; |
1993 | s->sy_value.X_add_number = (offsetT) val; | |
1994 | s->sy_value.X_unsigned = 0; | |
06e77878 | 1995 | S_CLEAR_WEAKREFR (s); |
252b5132 RH |
1996 | } |
1997 | ||
1998 | void | |
74937d39 | 1999 | copy_symbol_attributes (symbolS *dest, symbolS *src) |
252b5132 | 2000 | { |
49309057 | 2001 | if (LOCAL_SYMBOL_CHECK (dest)) |
7f2f689c | 2002 | dest = local_symbol_convert ((struct local_symbol *) dest); |
49309057 | 2003 | if (LOCAL_SYMBOL_CHECK (src)) |
7f2f689c | 2004 | src = local_symbol_convert ((struct local_symbol *) src); |
49309057 | 2005 | |
252b5132 RH |
2006 | /* In an expression, transfer the settings of these flags. |
2007 | The user can override later, of course. */ | |
ad04f5ce L |
2008 | #define COPIED_SYMFLAGS (BSF_FUNCTION | BSF_OBJECT \ |
2009 | | BSF_GNU_INDIRECT_FUNCTION) | |
252b5132 | 2010 | dest->bsym->flags |= src->bsym->flags & COPIED_SYMFLAGS; |
252b5132 RH |
2011 | |
2012 | #ifdef OBJ_COPY_SYMBOL_ATTRIBUTES | |
2013 | OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src); | |
2014 | #endif | |
794ba86a DJ |
2015 | |
2016 | #ifdef TC_COPY_SYMBOL_ATTRIBUTES | |
2017 | TC_COPY_SYMBOL_ATTRIBUTES (dest, src); | |
2018 | #endif | |
252b5132 RH |
2019 | } |
2020 | ||
252b5132 | 2021 | int |
74937d39 | 2022 | S_IS_FUNCTION (symbolS *s) |
252b5132 | 2023 | { |
49309057 ILT |
2024 | flagword flags; |
2025 | ||
2026 | if (LOCAL_SYMBOL_CHECK (s)) | |
2027 | return 0; | |
2028 | ||
2029 | flags = s->bsym->flags; | |
252b5132 RH |
2030 | |
2031 | return (flags & BSF_FUNCTION) != 0; | |
2032 | } | |
2033 | ||
2034 | int | |
74937d39 | 2035 | S_IS_EXTERNAL (symbolS *s) |
252b5132 | 2036 | { |
49309057 ILT |
2037 | flagword flags; |
2038 | ||
2039 | if (LOCAL_SYMBOL_CHECK (s)) | |
2040 | return 0; | |
2041 | ||
2042 | flags = s->bsym->flags; | |
252b5132 | 2043 | |
7c743825 | 2044 | /* Sanity check. */ |
252b5132 RH |
2045 | if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL)) |
2046 | abort (); | |
2047 | ||
2048 | return (flags & BSF_GLOBAL) != 0; | |
2049 | } | |
2050 | ||
2051 | int | |
74937d39 | 2052 | S_IS_WEAK (symbolS *s) |
252b5132 | 2053 | { |
49309057 ILT |
2054 | if (LOCAL_SYMBOL_CHECK (s)) |
2055 | return 0; | |
06e77878 AO |
2056 | /* Conceptually, a weakrefr is weak if the referenced symbol is. We |
2057 | could probably handle a WEAKREFR as always weak though. E.g., if | |
2058 | the referenced symbol has lost its weak status, there's no reason | |
2059 | to keep handling the weakrefr as if it was weak. */ | |
2060 | if (S_IS_WEAKREFR (s)) | |
2061 | return S_IS_WEAK (s->sy_value.X_add_symbol); | |
252b5132 RH |
2062 | return (s->bsym->flags & BSF_WEAK) != 0; |
2063 | } | |
2064 | ||
06e77878 AO |
2065 | int |
2066 | S_IS_WEAKREFR (symbolS *s) | |
2067 | { | |
2068 | if (LOCAL_SYMBOL_CHECK (s)) | |
2069 | return 0; | |
158184ac | 2070 | return s->sy_flags.sy_weakrefr != 0; |
06e77878 AO |
2071 | } |
2072 | ||
2073 | int | |
2074 | S_IS_WEAKREFD (symbolS *s) | |
2075 | { | |
2076 | if (LOCAL_SYMBOL_CHECK (s)) | |
2077 | return 0; | |
158184ac | 2078 | return s->sy_flags.sy_weakrefd != 0; |
06e77878 AO |
2079 | } |
2080 | ||
252b5132 | 2081 | int |
74937d39 | 2082 | S_IS_COMMON (symbolS *s) |
252b5132 | 2083 | { |
49309057 ILT |
2084 | if (LOCAL_SYMBOL_CHECK (s)) |
2085 | return 0; | |
252b5132 RH |
2086 | return bfd_is_com_section (s->bsym->section); |
2087 | } | |
2088 | ||
2089 | int | |
74937d39 | 2090 | S_IS_DEFINED (symbolS *s) |
252b5132 | 2091 | { |
49309057 ILT |
2092 | if (LOCAL_SYMBOL_CHECK (s)) |
2093 | return ((struct local_symbol *) s)->lsy_section != undefined_section; | |
252b5132 RH |
2094 | return s->bsym->section != undefined_section; |
2095 | } | |
2096 | ||
a161fe53 AM |
2097 | |
2098 | #ifndef EXTERN_FORCE_RELOC | |
2099 | #define EXTERN_FORCE_RELOC IS_ELF | |
2100 | #endif | |
2101 | ||
2102 | /* Return true for symbols that should not be reduced to section | |
2103 | symbols or eliminated from expressions, because they may be | |
2104 | overridden by the linker. */ | |
2105 | int | |
74937d39 | 2106 | S_FORCE_RELOC (symbolS *s, int strict) |
a161fe53 | 2107 | { |
f2d830a5 | 2108 | segT sec; |
a161fe53 | 2109 | if (LOCAL_SYMBOL_CHECK (s)) |
f2d830a5 AM |
2110 | sec = ((struct local_symbol *) s)->lsy_section; |
2111 | else | |
2112 | { | |
2113 | if ((strict | |
ae6063d4 AM |
2114 | && ((s->bsym->flags & BSF_WEAK) != 0 |
2115 | || (EXTERN_FORCE_RELOC | |
2116 | && (s->bsym->flags & BSF_GLOBAL) != 0))) | |
f2d830a5 AM |
2117 | || (s->bsym->flags & BSF_GNU_INDIRECT_FUNCTION) != 0) |
2118 | return TRUE; | |
2119 | sec = s->bsym->section; | |
2120 | } | |
2121 | return bfd_is_und_section (sec) || bfd_is_com_section (sec); | |
a161fe53 AM |
2122 | } |
2123 | ||
252b5132 | 2124 | int |
74937d39 | 2125 | S_IS_DEBUG (symbolS *s) |
252b5132 | 2126 | { |
49309057 ILT |
2127 | if (LOCAL_SYMBOL_CHECK (s)) |
2128 | return 0; | |
252b5132 RH |
2129 | if (s->bsym->flags & BSF_DEBUGGING) |
2130 | return 1; | |
2131 | return 0; | |
2132 | } | |
2133 | ||
2134 | int | |
74937d39 | 2135 | S_IS_LOCAL (symbolS *s) |
252b5132 | 2136 | { |
49309057 | 2137 | flagword flags; |
252b5132 RH |
2138 | const char *name; |
2139 | ||
49309057 ILT |
2140 | if (LOCAL_SYMBOL_CHECK (s)) |
2141 | return 1; | |
2142 | ||
2143 | flags = s->bsym->flags; | |
2144 | ||
7c743825 | 2145 | /* Sanity check. */ |
252b5132 RH |
2146 | if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL)) |
2147 | abort (); | |
2148 | ||
2149 | if (bfd_get_section (s->bsym) == reg_section) | |
2150 | return 1; | |
2151 | ||
2152 | if (flag_strip_local_absolute | |
bb82af9f NC |
2153 | /* Keep BSF_FILE symbols in order to allow debuggers to identify |
2154 | the source file even when the object file is stripped. */ | |
2155 | && (flags & (BSF_GLOBAL | BSF_FILE)) == 0 | |
252b5132 RH |
2156 | && bfd_get_section (s->bsym) == absolute_section) |
2157 | return 1; | |
2158 | ||
2159 | name = S_GET_NAME (s); | |
2160 | return (name != NULL | |
2161 | && ! S_IS_DEBUG (s) | |
aa257fcd NC |
2162 | && (strchr (name, DOLLAR_LABEL_CHAR) |
2163 | || strchr (name, LOCAL_LABEL_CHAR) | |
df58fc94 | 2164 | || TC_LABEL_IS_LOCAL (name) |
252b5132 RH |
2165 | || (! flag_keep_locals |
2166 | && (bfd_is_local_label (stdoutput, s->bsym) | |
2167 | || (flag_mri | |
2168 | && name[0] == '?' | |
2169 | && name[1] == '?'))))); | |
2170 | } | |
2171 | ||
252b5132 | 2172 | int |
74937d39 | 2173 | S_IS_STABD (symbolS *s) |
252b5132 RH |
2174 | { |
2175 | return S_GET_NAME (s) == 0; | |
2176 | } | |
2177 | ||
6885131b AM |
2178 | int |
2179 | S_CAN_BE_REDEFINED (const symbolS *s) | |
2180 | { | |
2181 | if (LOCAL_SYMBOL_CHECK (s)) | |
2182 | return (local_symbol_get_frag ((struct local_symbol *) s) | |
2183 | == &predefined_address_frag); | |
2184 | /* Permit register names to be redefined. */ | |
2185 | return s->bsym->section == reg_section; | |
2186 | } | |
2187 | ||
9497f5ac NC |
2188 | int |
2189 | S_IS_VOLATILE (const symbolS *s) | |
2190 | { | |
2191 | if (LOCAL_SYMBOL_CHECK (s)) | |
2192 | return 0; | |
158184ac | 2193 | return s->sy_flags.sy_volatile; |
9497f5ac NC |
2194 | } |
2195 | ||
2196 | int | |
2197 | S_IS_FORWARD_REF (const symbolS *s) | |
2198 | { | |
2199 | if (LOCAL_SYMBOL_CHECK (s)) | |
2200 | return 0; | |
158184ac | 2201 | return s->sy_flags.sy_forward_ref; |
9497f5ac NC |
2202 | } |
2203 | ||
9758f3fc | 2204 | const char * |
74937d39 | 2205 | S_GET_NAME (symbolS *s) |
252b5132 | 2206 | { |
49309057 ILT |
2207 | if (LOCAL_SYMBOL_CHECK (s)) |
2208 | return ((struct local_symbol *) s)->lsy_name; | |
252b5132 RH |
2209 | return s->bsym->name; |
2210 | } | |
2211 | ||
2212 | segT | |
74937d39 | 2213 | S_GET_SEGMENT (symbolS *s) |
252b5132 | 2214 | { |
49309057 ILT |
2215 | if (LOCAL_SYMBOL_CHECK (s)) |
2216 | return ((struct local_symbol *) s)->lsy_section; | |
252b5132 RH |
2217 | return s->bsym->section; |
2218 | } | |
2219 | ||
2220 | void | |
74937d39 | 2221 | S_SET_SEGMENT (symbolS *s, segT seg) |
252b5132 RH |
2222 | { |
2223 | /* Don't reassign section symbols. The direct reason is to prevent seg | |
2224 | faults assigning back to const global symbols such as *ABS*, but it | |
2225 | shouldn't happen anyway. */ | |
2226 | ||
49309057 ILT |
2227 | if (LOCAL_SYMBOL_CHECK (s)) |
2228 | { | |
2229 | if (seg == reg_section) | |
2230 | s = local_symbol_convert ((struct local_symbol *) s); | |
2231 | else | |
2232 | { | |
2233 | ((struct local_symbol *) s)->lsy_section = seg; | |
2234 | return; | |
2235 | } | |
2236 | } | |
2237 | ||
252b5132 RH |
2238 | if (s->bsym->flags & BSF_SECTION_SYM) |
2239 | { | |
2240 | if (s->bsym->section != seg) | |
7c743825 | 2241 | abort (); |
252b5132 RH |
2242 | } |
2243 | else | |
2244 | s->bsym->section = seg; | |
2245 | } | |
2246 | ||
2247 | void | |
74937d39 | 2248 | S_SET_EXTERNAL (symbolS *s) |
252b5132 | 2249 | { |
49309057 ILT |
2250 | if (LOCAL_SYMBOL_CHECK (s)) |
2251 | s = local_symbol_convert ((struct local_symbol *) s); | |
252b5132 RH |
2252 | if ((s->bsym->flags & BSF_WEAK) != 0) |
2253 | { | |
2254 | /* Let .weak override .global. */ | |
2255 | return; | |
2256 | } | |
4d7c34bf NC |
2257 | if (s->bsym->flags & BSF_SECTION_SYM) |
2258 | { | |
4d7c34bf | 2259 | /* Do not reassign section symbols. */ |
3b4dbbbf | 2260 | as_warn (_("section symbols are already global")); |
4d7c34bf NC |
2261 | return; |
2262 | } | |
97c4f2d9 | 2263 | #ifndef TC_GLOBAL_REGISTER_SYMBOL_OK |
d0548f34 L |
2264 | if (S_GET_SEGMENT (s) == reg_section) |
2265 | { | |
2266 | as_bad ("can't make register symbol `%s' global", | |
2267 | S_GET_NAME (s)); | |
2268 | return; | |
2269 | } | |
97c4f2d9 | 2270 | #endif |
252b5132 | 2271 | s->bsym->flags |= BSF_GLOBAL; |
7c743825 | 2272 | s->bsym->flags &= ~(BSF_LOCAL | BSF_WEAK); |
977cdf5a | 2273 | |
22ba0981 | 2274 | #ifdef TE_PE |
977cdf5a NC |
2275 | if (! an_external_name && S_GET_NAME(s)[0] != '.') |
2276 | an_external_name = S_GET_NAME (s); | |
2277 | #endif | |
252b5132 RH |
2278 | } |
2279 | ||
2280 | void | |
74937d39 | 2281 | S_CLEAR_EXTERNAL (symbolS *s) |
252b5132 | 2282 | { |
49309057 ILT |
2283 | if (LOCAL_SYMBOL_CHECK (s)) |
2284 | return; | |
252b5132 RH |
2285 | if ((s->bsym->flags & BSF_WEAK) != 0) |
2286 | { | |
2287 | /* Let .weak override. */ | |
2288 | return; | |
2289 | } | |
2290 | s->bsym->flags |= BSF_LOCAL; | |
7c743825 | 2291 | s->bsym->flags &= ~(BSF_GLOBAL | BSF_WEAK); |
252b5132 RH |
2292 | } |
2293 | ||
2294 | void | |
74937d39 | 2295 | S_SET_WEAK (symbolS *s) |
252b5132 | 2296 | { |
49309057 ILT |
2297 | if (LOCAL_SYMBOL_CHECK (s)) |
2298 | s = local_symbol_convert ((struct local_symbol *) s); | |
06e77878 AO |
2299 | #ifdef obj_set_weak_hook |
2300 | obj_set_weak_hook (s); | |
2301 | #endif | |
252b5132 | 2302 | s->bsym->flags |= BSF_WEAK; |
7c743825 | 2303 | s->bsym->flags &= ~(BSF_GLOBAL | BSF_LOCAL); |
252b5132 RH |
2304 | } |
2305 | ||
06e77878 AO |
2306 | void |
2307 | S_SET_WEAKREFR (symbolS *s) | |
2308 | { | |
2309 | if (LOCAL_SYMBOL_CHECK (s)) | |
2310 | s = local_symbol_convert ((struct local_symbol *) s); | |
158184ac | 2311 | s->sy_flags.sy_weakrefr = 1; |
06e77878 AO |
2312 | /* If the alias was already used, make sure we mark the target as |
2313 | used as well, otherwise it might be dropped from the symbol | |
2314 | table. This may have unintended side effects if the alias is | |
2315 | later redirected to another symbol, such as keeping the unused | |
2316 | previous target in the symbol table. Since it will be weak, it's | |
2317 | not a big deal. */ | |
158184ac | 2318 | if (s->sy_flags.sy_used) |
06e77878 AO |
2319 | symbol_mark_used (s->sy_value.X_add_symbol); |
2320 | } | |
2321 | ||
2322 | void | |
2323 | S_CLEAR_WEAKREFR (symbolS *s) | |
2324 | { | |
2325 | if (LOCAL_SYMBOL_CHECK (s)) | |
2326 | return; | |
158184ac | 2327 | s->sy_flags.sy_weakrefr = 0; |
06e77878 AO |
2328 | } |
2329 | ||
2330 | void | |
2331 | S_SET_WEAKREFD (symbolS *s) | |
2332 | { | |
2333 | if (LOCAL_SYMBOL_CHECK (s)) | |
2334 | s = local_symbol_convert ((struct local_symbol *) s); | |
158184ac | 2335 | s->sy_flags.sy_weakrefd = 1; |
06e77878 AO |
2336 | S_SET_WEAK (s); |
2337 | } | |
2338 | ||
2339 | void | |
2340 | S_CLEAR_WEAKREFD (symbolS *s) | |
2341 | { | |
2342 | if (LOCAL_SYMBOL_CHECK (s)) | |
2343 | return; | |
158184ac | 2344 | if (s->sy_flags.sy_weakrefd) |
06e77878 | 2345 | { |
158184ac | 2346 | s->sy_flags.sy_weakrefd = 0; |
06e77878 AO |
2347 | /* If a weakref target symbol is weak, then it was never |
2348 | referenced directly before, not even in a .global directive, | |
2349 | so decay it to local. If it remains undefined, it will be | |
2350 | later turned into a global, like any other undefined | |
2351 | symbol. */ | |
2352 | if (s->bsym->flags & BSF_WEAK) | |
2353 | { | |
2354 | #ifdef obj_clear_weak_hook | |
2355 | obj_clear_weak_hook (s); | |
2356 | #endif | |
2357 | s->bsym->flags &= ~BSF_WEAK; | |
2358 | s->bsym->flags |= BSF_LOCAL; | |
2359 | } | |
2360 | } | |
2361 | } | |
2362 | ||
00f7efb6 | 2363 | void |
74937d39 | 2364 | S_SET_THREAD_LOCAL (symbolS *s) |
00f7efb6 JJ |
2365 | { |
2366 | if (LOCAL_SYMBOL_CHECK (s)) | |
2367 | s = local_symbol_convert ((struct local_symbol *) s); | |
2368 | if (bfd_is_com_section (s->bsym->section) | |
2369 | && (s->bsym->flags & BSF_THREAD_LOCAL) != 0) | |
2370 | return; | |
2371 | s->bsym->flags |= BSF_THREAD_LOCAL; | |
2372 | if ((s->bsym->flags & BSF_FUNCTION) != 0) | |
2373 | as_bad (_("Accessing function `%s' as thread-local object"), | |
2374 | S_GET_NAME (s)); | |
2375 | else if (! bfd_is_und_section (s->bsym->section) | |
2376 | && (s->bsym->section->flags & SEC_THREAD_LOCAL) == 0) | |
2377 | as_bad (_("Accessing `%s' as thread-local object"), | |
2378 | S_GET_NAME (s)); | |
2379 | } | |
2380 | ||
252b5132 | 2381 | void |
977cdf5a | 2382 | S_SET_NAME (symbolS *s, const char *name) |
252b5132 | 2383 | { |
49309057 ILT |
2384 | if (LOCAL_SYMBOL_CHECK (s)) |
2385 | { | |
2386 | ((struct local_symbol *) s)->lsy_name = name; | |
2387 | return; | |
2388 | } | |
252b5132 RH |
2389 | s->bsym->name = name; |
2390 | } | |
49309057 | 2391 | |
9497f5ac NC |
2392 | void |
2393 | S_SET_VOLATILE (symbolS *s) | |
2394 | { | |
2395 | if (LOCAL_SYMBOL_CHECK (s)) | |
2396 | s = local_symbol_convert ((struct local_symbol *) s); | |
158184ac | 2397 | s->sy_flags.sy_volatile = 1; |
9497f5ac NC |
2398 | } |
2399 | ||
92757bc9 JB |
2400 | void |
2401 | S_CLEAR_VOLATILE (symbolS *s) | |
2402 | { | |
2403 | if (!LOCAL_SYMBOL_CHECK (s)) | |
158184ac | 2404 | s->sy_flags.sy_volatile = 0; |
92757bc9 JB |
2405 | } |
2406 | ||
9497f5ac NC |
2407 | void |
2408 | S_SET_FORWARD_REF (symbolS *s) | |
2409 | { | |
2410 | if (LOCAL_SYMBOL_CHECK (s)) | |
2411 | s = local_symbol_convert ((struct local_symbol *) s); | |
158184ac | 2412 | s->sy_flags.sy_forward_ref = 1; |
9497f5ac NC |
2413 | } |
2414 | ||
49309057 ILT |
2415 | /* Return the previous symbol in a chain. */ |
2416 | ||
2417 | symbolS * | |
74937d39 | 2418 | symbol_previous (symbolS *s) |
49309057 ILT |
2419 | { |
2420 | if (LOCAL_SYMBOL_CHECK (s)) | |
2421 | abort (); | |
2422 | return s->sy_previous; | |
2423 | } | |
2424 | ||
49309057 ILT |
2425 | /* Return the next symbol in a chain. */ |
2426 | ||
2427 | symbolS * | |
74937d39 | 2428 | symbol_next (symbolS *s) |
49309057 ILT |
2429 | { |
2430 | if (LOCAL_SYMBOL_CHECK (s)) | |
2431 | abort (); | |
2432 | return s->sy_next; | |
2433 | } | |
2434 | ||
2435 | /* Return a pointer to the value of a symbol as an expression. */ | |
2436 | ||
2437 | expressionS * | |
74937d39 | 2438 | symbol_get_value_expression (symbolS *s) |
49309057 ILT |
2439 | { |
2440 | if (LOCAL_SYMBOL_CHECK (s)) | |
2441 | s = local_symbol_convert ((struct local_symbol *) s); | |
2442 | return &s->sy_value; | |
2443 | } | |
2444 | ||
2445 | /* Set the value of a symbol to an expression. */ | |
2446 | ||
2447 | void | |
74937d39 | 2448 | symbol_set_value_expression (symbolS *s, const expressionS *exp) |
49309057 ILT |
2449 | { |
2450 | if (LOCAL_SYMBOL_CHECK (s)) | |
2451 | s = local_symbol_convert ((struct local_symbol *) s); | |
2452 | s->sy_value = *exp; | |
06e77878 | 2453 | S_CLEAR_WEAKREFR (s); |
49309057 ILT |
2454 | } |
2455 | ||
087d837e L |
2456 | /* Return whether 2 symbols are the same. */ |
2457 | ||
2458 | int | |
2459 | symbol_same_p (symbolS *s1, symbolS *s2) | |
2460 | { | |
158184ac | 2461 | if (s1->sy_flags.sy_local_symbol |
087d837e L |
2462 | && local_symbol_converted_p ((struct local_symbol *) s1)) |
2463 | s1 = local_symbol_get_real_symbol ((struct local_symbol *) s1); | |
158184ac | 2464 | if (s2->sy_flags.sy_local_symbol |
087d837e L |
2465 | && local_symbol_converted_p ((struct local_symbol *) s2)) |
2466 | s2 = local_symbol_get_real_symbol ((struct local_symbol *) s2); | |
2467 | return s1 == s2; | |
2468 | } | |
2469 | ||
be95a9c1 AM |
2470 | /* Return a pointer to the X_add_number component of a symbol. */ |
2471 | ||
514d955d | 2472 | offsetT * |
be95a9c1 AM |
2473 | symbol_X_add_number (symbolS *s) |
2474 | { | |
be95a9c1 | 2475 | if (LOCAL_SYMBOL_CHECK (s)) |
514d955d | 2476 | return (offsetT *) &((struct local_symbol *) s)->lsy_value; |
be95a9c1 | 2477 | |
514d955d | 2478 | return &s->sy_value.X_add_number; |
be95a9c1 AM |
2479 | } |
2480 | ||
b7d6ed97 RH |
2481 | /* Set the value of SYM to the current position in the current segment. */ |
2482 | ||
2483 | void | |
74937d39 | 2484 | symbol_set_value_now (symbolS *sym) |
b7d6ed97 RH |
2485 | { |
2486 | S_SET_SEGMENT (sym, now_seg); | |
2487 | S_SET_VALUE (sym, frag_now_fix ()); | |
2488 | symbol_set_frag (sym, frag_now); | |
2489 | } | |
2490 | ||
49309057 ILT |
2491 | /* Set the frag of a symbol. */ |
2492 | ||
2493 | void | |
74937d39 | 2494 | symbol_set_frag (symbolS *s, fragS *f) |
49309057 ILT |
2495 | { |
2496 | if (LOCAL_SYMBOL_CHECK (s)) | |
2497 | { | |
2498 | local_symbol_set_frag ((struct local_symbol *) s, f); | |
2499 | return; | |
2500 | } | |
2501 | s->sy_frag = f; | |
06e77878 | 2502 | S_CLEAR_WEAKREFR (s); |
49309057 ILT |
2503 | } |
2504 | ||
2505 | /* Return the frag of a symbol. */ | |
2506 | ||
2507 | fragS * | |
74937d39 | 2508 | symbol_get_frag (symbolS *s) |
49309057 ILT |
2509 | { |
2510 | if (LOCAL_SYMBOL_CHECK (s)) | |
2511 | return local_symbol_get_frag ((struct local_symbol *) s); | |
2512 | return s->sy_frag; | |
2513 | } | |
2514 | ||
2515 | /* Mark a symbol as having been used. */ | |
2516 | ||
2517 | void | |
74937d39 | 2518 | symbol_mark_used (symbolS *s) |
49309057 ILT |
2519 | { |
2520 | if (LOCAL_SYMBOL_CHECK (s)) | |
2521 | return; | |
158184ac | 2522 | s->sy_flags.sy_used = 1; |
06e77878 AO |
2523 | if (S_IS_WEAKREFR (s)) |
2524 | symbol_mark_used (s->sy_value.X_add_symbol); | |
49309057 ILT |
2525 | } |
2526 | ||
2527 | /* Clear the mark of whether a symbol has been used. */ | |
2528 | ||
2529 | void | |
74937d39 | 2530 | symbol_clear_used (symbolS *s) |
49309057 ILT |
2531 | { |
2532 | if (LOCAL_SYMBOL_CHECK (s)) | |
2533 | s = local_symbol_convert ((struct local_symbol *) s); | |
158184ac | 2534 | s->sy_flags.sy_used = 0; |
49309057 ILT |
2535 | } |
2536 | ||
2537 | /* Return whether a symbol has been used. */ | |
2538 | ||
2539 | int | |
74937d39 | 2540 | symbol_used_p (symbolS *s) |
49309057 ILT |
2541 | { |
2542 | if (LOCAL_SYMBOL_CHECK (s)) | |
2543 | return 1; | |
158184ac | 2544 | return s->sy_flags.sy_used; |
49309057 ILT |
2545 | } |
2546 | ||
2547 | /* Mark a symbol as having been used in a reloc. */ | |
2548 | ||
2549 | void | |
74937d39 | 2550 | symbol_mark_used_in_reloc (symbolS *s) |
49309057 ILT |
2551 | { |
2552 | if (LOCAL_SYMBOL_CHECK (s)) | |
2553 | s = local_symbol_convert ((struct local_symbol *) s); | |
158184ac | 2554 | s->sy_flags.sy_used_in_reloc = 1; |
49309057 ILT |
2555 | } |
2556 | ||
2557 | /* Clear the mark of whether a symbol has been used in a reloc. */ | |
2558 | ||
2559 | void | |
74937d39 | 2560 | symbol_clear_used_in_reloc (symbolS *s) |
49309057 ILT |
2561 | { |
2562 | if (LOCAL_SYMBOL_CHECK (s)) | |
2563 | return; | |
158184ac | 2564 | s->sy_flags.sy_used_in_reloc = 0; |
49309057 ILT |
2565 | } |
2566 | ||
2567 | /* Return whether a symbol has been used in a reloc. */ | |
2568 | ||
2569 | int | |
74937d39 | 2570 | symbol_used_in_reloc_p (symbolS *s) |
49309057 ILT |
2571 | { |
2572 | if (LOCAL_SYMBOL_CHECK (s)) | |
2573 | return 0; | |
158184ac | 2574 | return s->sy_flags.sy_used_in_reloc; |
49309057 ILT |
2575 | } |
2576 | ||
2577 | /* Mark a symbol as an MRI common symbol. */ | |
2578 | ||
2579 | void | |
74937d39 | 2580 | symbol_mark_mri_common (symbolS *s) |
49309057 ILT |
2581 | { |
2582 | if (LOCAL_SYMBOL_CHECK (s)) | |
2583 | s = local_symbol_convert ((struct local_symbol *) s); | |
158184ac | 2584 | s->sy_flags.sy_mri_common = 1; |
49309057 ILT |
2585 | } |
2586 | ||
2587 | /* Clear the mark of whether a symbol is an MRI common symbol. */ | |
2588 | ||
2589 | void | |
74937d39 | 2590 | symbol_clear_mri_common (symbolS *s) |
49309057 ILT |
2591 | { |
2592 | if (LOCAL_SYMBOL_CHECK (s)) | |
2593 | return; | |
158184ac | 2594 | s->sy_flags.sy_mri_common = 0; |
49309057 ILT |
2595 | } |
2596 | ||
2597 | /* Return whether a symbol is an MRI common symbol. */ | |
2598 | ||
2599 | int | |
74937d39 | 2600 | symbol_mri_common_p (symbolS *s) |
49309057 ILT |
2601 | { |
2602 | if (LOCAL_SYMBOL_CHECK (s)) | |
2603 | return 0; | |
158184ac | 2604 | return s->sy_flags.sy_mri_common; |
49309057 ILT |
2605 | } |
2606 | ||
2607 | /* Mark a symbol as having been written. */ | |
2608 | ||
2609 | void | |
74937d39 | 2610 | symbol_mark_written (symbolS *s) |
49309057 ILT |
2611 | { |
2612 | if (LOCAL_SYMBOL_CHECK (s)) | |
2613 | return; | |
158184ac | 2614 | s->sy_flags.sy_written = 1; |
49309057 ILT |
2615 | } |
2616 | ||
2617 | /* Clear the mark of whether a symbol has been written. */ | |
2618 | ||
2619 | void | |
74937d39 | 2620 | symbol_clear_written (symbolS *s) |
49309057 ILT |
2621 | { |
2622 | if (LOCAL_SYMBOL_CHECK (s)) | |
2623 | return; | |
158184ac | 2624 | s->sy_flags.sy_written = 0; |
49309057 ILT |
2625 | } |
2626 | ||
2627 | /* Return whether a symbol has been written. */ | |
2628 | ||
2629 | int | |
74937d39 | 2630 | symbol_written_p (symbolS *s) |
49309057 ILT |
2631 | { |
2632 | if (LOCAL_SYMBOL_CHECK (s)) | |
2633 | return 0; | |
158184ac | 2634 | return s->sy_flags.sy_written; |
49309057 ILT |
2635 | } |
2636 | ||
2637 | /* Mark a symbol has having been resolved. */ | |
2638 | ||
2639 | void | |
74937d39 | 2640 | symbol_mark_resolved (symbolS *s) |
49309057 ILT |
2641 | { |
2642 | if (LOCAL_SYMBOL_CHECK (s)) | |
2643 | { | |
2644 | local_symbol_mark_resolved ((struct local_symbol *) s); | |
2645 | return; | |
2646 | } | |
158184ac | 2647 | s->sy_flags.sy_resolved = 1; |
49309057 ILT |
2648 | } |
2649 | ||
2650 | /* Return whether a symbol has been resolved. */ | |
2651 | ||
2652 | int | |
74937d39 | 2653 | symbol_resolved_p (symbolS *s) |
49309057 ILT |
2654 | { |
2655 | if (LOCAL_SYMBOL_CHECK (s)) | |
2656 | return local_symbol_resolved_p ((struct local_symbol *) s); | |
158184ac | 2657 | return s->sy_flags.sy_resolved; |
49309057 ILT |
2658 | } |
2659 | ||
2660 | /* Return whether a symbol is a section symbol. */ | |
2661 | ||
2662 | int | |
74937d39 | 2663 | symbol_section_p (symbolS *s ATTRIBUTE_UNUSED) |
49309057 ILT |
2664 | { |
2665 | if (LOCAL_SYMBOL_CHECK (s)) | |
2666 | return 0; | |
49309057 | 2667 | return (s->bsym->flags & BSF_SECTION_SYM) != 0; |
49309057 ILT |
2668 | } |
2669 | ||
2670 | /* Return whether a symbol is equated to another symbol. */ | |
2671 | ||
2672 | int | |
74937d39 | 2673 | symbol_equated_p (symbolS *s) |
49309057 ILT |
2674 | { |
2675 | if (LOCAL_SYMBOL_CHECK (s)) | |
2676 | return 0; | |
2677 | return s->sy_value.X_op == O_symbol; | |
2678 | } | |
2679 | ||
e0890092 AM |
2680 | /* Return whether a symbol is equated to another symbol, and should be |
2681 | treated specially when writing out relocs. */ | |
2682 | ||
2683 | int | |
74937d39 | 2684 | symbol_equated_reloc_p (symbolS *s) |
e0890092 AM |
2685 | { |
2686 | if (LOCAL_SYMBOL_CHECK (s)) | |
2687 | return 0; | |
2688 | /* X_op_symbol, normally not used for O_symbol, is set by | |
2689 | resolve_symbol_value to flag expression syms that have been | |
2690 | equated. */ | |
2691 | return (s->sy_value.X_op == O_symbol | |
7be1c489 | 2692 | #if defined (OBJ_COFF) && defined (TE_PE) |
977cdf5a NC |
2693 | && ! S_IS_WEAK (s) |
2694 | #endif | |
158184ac | 2695 | && ((s->sy_flags.sy_resolved && s->sy_value.X_op_symbol != NULL) |
e0890092 AM |
2696 | || ! S_IS_DEFINED (s) |
2697 | || S_IS_COMMON (s))); | |
2698 | } | |
2699 | ||
49309057 ILT |
2700 | /* Return whether a symbol has a constant value. */ |
2701 | ||
2702 | int | |
74937d39 | 2703 | symbol_constant_p (symbolS *s) |
49309057 ILT |
2704 | { |
2705 | if (LOCAL_SYMBOL_CHECK (s)) | |
2706 | return 1; | |
2707 | return s->sy_value.X_op == O_constant; | |
2708 | } | |
2709 | ||
bdf128d6 JB |
2710 | /* Return whether a symbol was cloned and thus removed from the global |
2711 | symbol list. */ | |
2712 | ||
2713 | int | |
2714 | symbol_shadow_p (symbolS *s) | |
2715 | { | |
2716 | if (LOCAL_SYMBOL_CHECK (s)) | |
2717 | return 0; | |
2718 | return s->sy_next == s; | |
2719 | } | |
2720 | ||
49309057 ILT |
2721 | /* Return the BFD symbol for a symbol. */ |
2722 | ||
2723 | asymbol * | |
74937d39 | 2724 | symbol_get_bfdsym (symbolS *s) |
49309057 ILT |
2725 | { |
2726 | if (LOCAL_SYMBOL_CHECK (s)) | |
2727 | s = local_symbol_convert ((struct local_symbol *) s); | |
2728 | return s->bsym; | |
2729 | } | |
2730 | ||
2731 | /* Set the BFD symbol for a symbol. */ | |
2732 | ||
2733 | void | |
74937d39 | 2734 | symbol_set_bfdsym (symbolS *s, asymbol *bsym) |
49309057 ILT |
2735 | { |
2736 | if (LOCAL_SYMBOL_CHECK (s)) | |
2737 | s = local_symbol_convert ((struct local_symbol *) s); | |
22fe14ad NC |
2738 | /* Usually, it is harmless to reset a symbol to a BFD section |
2739 | symbol. For example, obj_elf_change_section sets the BFD symbol | |
2740 | of an old symbol with the newly created section symbol. But when | |
2741 | we have multiple sections with the same name, the newly created | |
2742 | section may have the same name as an old section. We check if the | |
2743 | old symbol has been already marked as a section symbol before | |
2744 | resetting it. */ | |
2745 | if ((s->bsym->flags & BSF_SECTION_SYM) == 0) | |
2746 | s->bsym = bsym; | |
2747 | /* else XXX - What do we do now ? */ | |
49309057 ILT |
2748 | } |
2749 | ||
49309057 ILT |
2750 | #ifdef OBJ_SYMFIELD_TYPE |
2751 | ||
2752 | /* Get a pointer to the object format information for a symbol. */ | |
2753 | ||
2754 | OBJ_SYMFIELD_TYPE * | |
74937d39 | 2755 | symbol_get_obj (symbolS *s) |
49309057 ILT |
2756 | { |
2757 | if (LOCAL_SYMBOL_CHECK (s)) | |
2758 | s = local_symbol_convert ((struct local_symbol *) s); | |
2759 | return &s->sy_obj; | |
2760 | } | |
2761 | ||
2762 | /* Set the object format information for a symbol. */ | |
2763 | ||
2764 | void | |
74937d39 | 2765 | symbol_set_obj (symbolS *s, OBJ_SYMFIELD_TYPE *o) |
49309057 ILT |
2766 | { |
2767 | if (LOCAL_SYMBOL_CHECK (s)) | |
2768 | s = local_symbol_convert ((struct local_symbol *) s); | |
2769 | s->sy_obj = *o; | |
2770 | } | |
2771 | ||
2772 | #endif /* OBJ_SYMFIELD_TYPE */ | |
2773 | ||
2774 | #ifdef TC_SYMFIELD_TYPE | |
2775 | ||
2776 | /* Get a pointer to the processor information for a symbol. */ | |
2777 | ||
2778 | TC_SYMFIELD_TYPE * | |
74937d39 | 2779 | symbol_get_tc (symbolS *s) |
49309057 ILT |
2780 | { |
2781 | if (LOCAL_SYMBOL_CHECK (s)) | |
2782 | s = local_symbol_convert ((struct local_symbol *) s); | |
2783 | return &s->sy_tc; | |
2784 | } | |
2785 | ||
2786 | /* Set the processor information for a symbol. */ | |
2787 | ||
2788 | void | |
74937d39 | 2789 | symbol_set_tc (symbolS *s, TC_SYMFIELD_TYPE *o) |
49309057 ILT |
2790 | { |
2791 | if (LOCAL_SYMBOL_CHECK (s)) | |
2792 | s = local_symbol_convert ((struct local_symbol *) s); | |
2793 | s->sy_tc = *o; | |
2794 | } | |
2795 | ||
2796 | #endif /* TC_SYMFIELD_TYPE */ | |
2797 | ||
252b5132 | 2798 | void |
74937d39 | 2799 | symbol_begin (void) |
252b5132 RH |
2800 | { |
2801 | symbol_lastP = NULL; | |
7c743825 | 2802 | symbol_rootP = NULL; /* In case we have 0 symbols (!!) */ |
252b5132 | 2803 | sy_hash = hash_new (); |
49309057 | 2804 | local_hash = hash_new (); |
252b5132 RH |
2805 | |
2806 | memset ((char *) (&abs_symbol), '\0', sizeof (abs_symbol)); | |
252b5132 | 2807 | #if defined (EMIT_SECTION_SYMBOLS) || !defined (RELOC_REQUIRES_SYMBOL) |
45dfa85a | 2808 | abs_symbol.bsym = bfd_abs_section_ptr->symbol; |
252b5132 RH |
2809 | #endif |
2810 | abs_symbol.sy_value.X_op = O_constant; | |
2811 | abs_symbol.sy_frag = &zero_address_frag; | |
2812 | ||
2813 | if (LOCAL_LABELS_FB) | |
2814 | fb_label_init (); | |
2815 | } | |
4a826962 MR |
2816 | |
2817 | void | |
2818 | dot_symbol_init (void) | |
2819 | { | |
2820 | dot_symbol.bsym = bfd_make_empty_symbol (stdoutput); | |
2821 | if (dot_symbol.bsym == NULL) | |
2822 | as_fatal ("bfd_make_empty_symbol: %s", bfd_errmsg (bfd_get_error ())); | |
2823 | dot_symbol.bsym->name = "."; | |
158184ac | 2824 | dot_symbol.sy_flags.sy_forward_ref = 1; |
4a826962 MR |
2825 | dot_symbol.sy_value.X_op = O_constant; |
2826 | } | |
252b5132 RH |
2827 | \f |
2828 | int indent_level; | |
2829 | ||
2830 | /* Maximum indent level. | |
2831 | Available for modification inside a gdb session. */ | |
87c245cc | 2832 | static int max_indent_level = 8; |
252b5132 | 2833 | |
252b5132 | 2834 | void |
74937d39 | 2835 | print_symbol_value_1 (FILE *file, symbolS *sym) |
252b5132 RH |
2836 | { |
2837 | const char *name = S_GET_NAME (sym); | |
2838 | if (!name || !name[0]) | |
2839 | name = "(unnamed)"; | |
d2df793a NC |
2840 | fprintf (file, "sym "); |
2841 | fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) sym)); | |
2842 | fprintf (file, " %s", name); | |
49309057 ILT |
2843 | |
2844 | if (LOCAL_SYMBOL_CHECK (sym)) | |
2845 | { | |
2846 | struct local_symbol *locsym = (struct local_symbol *) sym; | |
d2df793a NC |
2847 | |
2848 | if (local_symbol_get_frag (locsym) != & zero_address_frag | |
49309057 | 2849 | && local_symbol_get_frag (locsym) != NULL) |
d2df793a NC |
2850 | { |
2851 | fprintf (file, " frag "); | |
2852 | fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) local_symbol_get_frag (locsym))); | |
2853 | } | |
49309057 ILT |
2854 | if (local_symbol_resolved_p (locsym)) |
2855 | fprintf (file, " resolved"); | |
2856 | fprintf (file, " local"); | |
2857 | } | |
2858 | else | |
2859 | { | |
2860 | if (sym->sy_frag != &zero_address_frag) | |
d2df793a NC |
2861 | { |
2862 | fprintf (file, " frag "); | |
2863 | fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) sym->sy_frag)); | |
2864 | } | |
158184ac | 2865 | if (sym->sy_flags.sy_written) |
49309057 | 2866 | fprintf (file, " written"); |
158184ac | 2867 | if (sym->sy_flags.sy_resolved) |
49309057 | 2868 | fprintf (file, " resolved"); |
158184ac | 2869 | else if (sym->sy_flags.sy_resolving) |
49309057 | 2870 | fprintf (file, " resolving"); |
158184ac | 2871 | if (sym->sy_flags.sy_used_in_reloc) |
49309057 | 2872 | fprintf (file, " used-in-reloc"); |
158184ac | 2873 | if (sym->sy_flags.sy_used) |
49309057 ILT |
2874 | fprintf (file, " used"); |
2875 | if (S_IS_LOCAL (sym)) | |
2876 | fprintf (file, " local"); | |
e97b3f28 | 2877 | if (S_IS_EXTERNAL (sym)) |
49309057 | 2878 | fprintf (file, " extern"); |
06e77878 AO |
2879 | if (S_IS_WEAK (sym)) |
2880 | fprintf (file, " weak"); | |
49309057 ILT |
2881 | if (S_IS_DEBUG (sym)) |
2882 | fprintf (file, " debug"); | |
2883 | if (S_IS_DEFINED (sym)) | |
2884 | fprintf (file, " defined"); | |
2885 | } | |
06e77878 AO |
2886 | if (S_IS_WEAKREFR (sym)) |
2887 | fprintf (file, " weakrefr"); | |
2888 | if (S_IS_WEAKREFD (sym)) | |
2889 | fprintf (file, " weakrefd"); | |
252b5132 | 2890 | fprintf (file, " %s", segment_name (S_GET_SEGMENT (sym))); |
49309057 | 2891 | if (symbol_resolved_p (sym)) |
252b5132 RH |
2892 | { |
2893 | segT s = S_GET_SEGMENT (sym); | |
2894 | ||
2895 | if (s != undefined_section | |
411863a4 | 2896 | && s != expr_section) |
0af1713e | 2897 | fprintf (file, " %lx", (unsigned long) S_GET_VALUE (sym)); |
252b5132 RH |
2898 | } |
2899 | else if (indent_level < max_indent_level | |
2900 | && S_GET_SEGMENT (sym) != undefined_section) | |
2901 | { | |
2902 | indent_level++; | |
2903 | fprintf (file, "\n%*s<", indent_level * 4, ""); | |
49309057 ILT |
2904 | if (LOCAL_SYMBOL_CHECK (sym)) |
2905 | fprintf (file, "constant %lx", | |
0af1713e | 2906 | (unsigned long) ((struct local_symbol *) sym)->lsy_value); |
49309057 ILT |
2907 | else |
2908 | print_expr_1 (file, &sym->sy_value); | |
252b5132 RH |
2909 | fprintf (file, ">"); |
2910 | indent_level--; | |
2911 | } | |
2912 | fflush (file); | |
2913 | } | |
2914 | ||
2915 | void | |
74937d39 | 2916 | print_symbol_value (symbolS *sym) |
252b5132 RH |
2917 | { |
2918 | indent_level = 0; | |
2919 | print_symbol_value_1 (stderr, sym); | |
2920 | fprintf (stderr, "\n"); | |
2921 | } | |
2922 | ||
2923 | static void | |
74937d39 | 2924 | print_binary (FILE *file, const char *name, expressionS *exp) |
252b5132 RH |
2925 | { |
2926 | indent_level++; | |
2927 | fprintf (file, "%s\n%*s<", name, indent_level * 4, ""); | |
2928 | print_symbol_value_1 (file, exp->X_add_symbol); | |
2929 | fprintf (file, ">\n%*s<", indent_level * 4, ""); | |
2930 | print_symbol_value_1 (file, exp->X_op_symbol); | |
2931 | fprintf (file, ">"); | |
2932 | indent_level--; | |
2933 | } | |
2934 | ||
2935 | void | |
74937d39 | 2936 | print_expr_1 (FILE *file, expressionS *exp) |
252b5132 | 2937 | { |
d2df793a NC |
2938 | fprintf (file, "expr "); |
2939 | fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) exp)); | |
2940 | fprintf (file, " "); | |
252b5132 RH |
2941 | switch (exp->X_op) |
2942 | { | |
2943 | case O_illegal: | |
2944 | fprintf (file, "illegal"); | |
2945 | break; | |
2946 | case O_absent: | |
2947 | fprintf (file, "absent"); | |
2948 | break; | |
2949 | case O_constant: | |
0af1713e | 2950 | fprintf (file, "constant %lx", (unsigned long) exp->X_add_number); |
252b5132 RH |
2951 | break; |
2952 | case O_symbol: | |
2953 | indent_level++; | |
2954 | fprintf (file, "symbol\n%*s<", indent_level * 4, ""); | |
2955 | print_symbol_value_1 (file, exp->X_add_symbol); | |
2956 | fprintf (file, ">"); | |
2957 | maybe_print_addnum: | |
2958 | if (exp->X_add_number) | |
2959 | fprintf (file, "\n%*s%lx", indent_level * 4, "", | |
0af1713e | 2960 | (unsigned long) exp->X_add_number); |
252b5132 RH |
2961 | indent_level--; |
2962 | break; | |
2963 | case O_register: | |
2964 | fprintf (file, "register #%d", (int) exp->X_add_number); | |
2965 | break; | |
2966 | case O_big: | |
2967 | fprintf (file, "big"); | |
2968 | break; | |
2969 | case O_uminus: | |
2970 | fprintf (file, "uminus -<"); | |
2971 | indent_level++; | |
2972 | print_symbol_value_1 (file, exp->X_add_symbol); | |
2973 | fprintf (file, ">"); | |
2974 | goto maybe_print_addnum; | |
2975 | case O_bit_not: | |
2976 | fprintf (file, "bit_not"); | |
2977 | break; | |
2978 | case O_multiply: | |
2979 | print_binary (file, "multiply", exp); | |
2980 | break; | |
2981 | case O_divide: | |
2982 | print_binary (file, "divide", exp); | |
2983 | break; | |
2984 | case O_modulus: | |
2985 | print_binary (file, "modulus", exp); | |
2986 | break; | |
2987 | case O_left_shift: | |
2988 | print_binary (file, "lshift", exp); | |
2989 | break; | |
2990 | case O_right_shift: | |
2991 | print_binary (file, "rshift", exp); | |
2992 | break; | |
2993 | case O_bit_inclusive_or: | |
2994 | print_binary (file, "bit_ior", exp); | |
2995 | break; | |
2996 | case O_bit_exclusive_or: | |
2997 | print_binary (file, "bit_xor", exp); | |
2998 | break; | |
2999 | case O_bit_and: | |
3000 | print_binary (file, "bit_and", exp); | |
3001 | break; | |
3002 | case O_eq: | |
3003 | print_binary (file, "eq", exp); | |
3004 | break; | |
3005 | case O_ne: | |
3006 | print_binary (file, "ne", exp); | |
3007 | break; | |
3008 | case O_lt: | |
3009 | print_binary (file, "lt", exp); | |
3010 | break; | |
3011 | case O_le: | |
3012 | print_binary (file, "le", exp); | |
3013 | break; | |
3014 | case O_ge: | |
3015 | print_binary (file, "ge", exp); | |
3016 | break; | |
3017 | case O_gt: | |
3018 | print_binary (file, "gt", exp); | |
3019 | break; | |
3020 | case O_logical_and: | |
3021 | print_binary (file, "logical_and", exp); | |
3022 | break; | |
3023 | case O_logical_or: | |
3024 | print_binary (file, "logical_or", exp); | |
3025 | break; | |
3026 | case O_add: | |
3027 | indent_level++; | |
3028 | fprintf (file, "add\n%*s<", indent_level * 4, ""); | |
3029 | print_symbol_value_1 (file, exp->X_add_symbol); | |
3030 | fprintf (file, ">\n%*s<", indent_level * 4, ""); | |
3031 | print_symbol_value_1 (file, exp->X_op_symbol); | |
3032 | fprintf (file, ">"); | |
3033 | goto maybe_print_addnum; | |
3034 | case O_subtract: | |
3035 | indent_level++; | |
3036 | fprintf (file, "subtract\n%*s<", indent_level * 4, ""); | |
3037 | print_symbol_value_1 (file, exp->X_add_symbol); | |
3038 | fprintf (file, ">\n%*s<", indent_level * 4, ""); | |
3039 | print_symbol_value_1 (file, exp->X_op_symbol); | |
3040 | fprintf (file, ">"); | |
3041 | goto maybe_print_addnum; | |
3042 | default: | |
3043 | fprintf (file, "{unknown opcode %d}", (int) exp->X_op); | |
3044 | break; | |
3045 | } | |
3046 | fflush (stdout); | |
3047 | } | |
3048 | ||
3049 | void | |
74937d39 | 3050 | print_expr (expressionS *exp) |
252b5132 RH |
3051 | { |
3052 | print_expr_1 (stderr, exp); | |
3053 | fprintf (stderr, "\n"); | |
3054 | } | |
3055 | ||
3056 | void | |
74937d39 | 3057 | symbol_print_statistics (FILE *file) |
252b5132 RH |
3058 | { |
3059 | hash_print_statistics (file, "symbol table", sy_hash); | |
49309057 ILT |
3060 | hash_print_statistics (file, "mini local symbol table", local_hash); |
3061 | fprintf (file, "%lu mini local symbols created, %lu converted\n", | |
3062 | local_symbol_count, local_symbol_conversion_count); | |
252b5132 | 3063 | } |
280d71bf DB |
3064 | |
3065 | #ifdef OBJ_COMPLEX_RELC | |
3066 | ||
3067 | /* Convert given symbol to a new complex-relocation symbol name. This | |
6f12865c | 3068 | may be a recursive function, since it might be called for non-leaf |
280d71bf | 3069 | nodes (plain symbols) in the expression tree. The caller owns the |
6f12865c AM |
3070 | returning string, so should free it eventually. Errors are |
3071 | indicated via as_bad and a NULL return value. The given symbol | |
280d71bf DB |
3072 | is marked with sy_used_in_reloc. */ |
3073 | ||
3074 | char * | |
3075 | symbol_relc_make_sym (symbolS * sym) | |
3076 | { | |
3077 | char * terminal = NULL; | |
3078 | const char * sname; | |
3079 | char typetag; | |
3080 | int sname_len; | |
3081 | ||
9c2799c2 | 3082 | gas_assert (sym != NULL); |
280d71bf DB |
3083 | |
3084 | /* Recurse to symbol_relc_make_expr if this symbol | |
3085 | is defined as an expression or a plain value. */ | |
3086 | if ( S_GET_SEGMENT (sym) == expr_section | |
3087 | || S_GET_SEGMENT (sym) == absolute_section) | |
3088 | return symbol_relc_make_expr (& sym->sy_value); | |
3089 | ||
3090 | /* This may be a "fake symbol" L0\001, referring to ".". | |
3091 | Write out a special null symbol to refer to this position. */ | |
3092 | if (! strcmp (S_GET_NAME (sym), FAKE_LABEL_NAME)) | |
3093 | return xstrdup ("."); | |
3094 | ||
3095 | /* We hope this is a plain leaf symbol. Construct the encoding | |
3096 | as {S,s}II...:CCCCCCC.... | |
3097 | where 'S'/'s' means section symbol / plain symbol | |
3098 | III is decimal for the symbol name length | |
3099 | CCC is the symbol name itself. */ | |
3100 | symbol_mark_used_in_reloc (sym); | |
3101 | ||
3102 | sname = S_GET_NAME (sym); | |
3103 | sname_len = strlen (sname); | |
3104 | typetag = symbol_section_p (sym) ? 'S' : 's'; | |
3105 | ||
add39d23 TS |
3106 | terminal = XNEWVEC (char, (1 /* S or s */ |
3107 | + 8 /* sname_len in decimal */ | |
3108 | + 1 /* _ spacer */ | |
3109 | + sname_len /* name itself */ | |
3110 | + 1 /* \0 */ )); | |
280d71bf DB |
3111 | |
3112 | sprintf (terminal, "%c%d:%s", typetag, sname_len, sname); | |
3113 | return terminal; | |
3114 | } | |
3115 | ||
3116 | /* Convert given value to a new complex-relocation symbol name. This | |
3117 | is a non-recursive function, since it is be called for leaf nodes | |
3118 | (plain values) in the expression tree. The caller owns the | |
3119 | returning string, so should free() it eventually. No errors. */ | |
3120 | ||
3121 | char * | |
3122 | symbol_relc_make_value (offsetT val) | |
3123 | { | |
325801bd | 3124 | char * terminal = XNEWVEC (char, 28); /* Enough for long long. */ |
280d71bf DB |
3125 | |
3126 | terminal[0] = '#'; | |
1a412f5f | 3127 | bfd_sprintf_vma (stdoutput, terminal + 1, val); |
280d71bf DB |
3128 | return terminal; |
3129 | } | |
3130 | ||
3131 | /* Convert given expression to a new complex-relocation symbol name. | |
3132 | This is a recursive function, since it traverses the entire given | |
3133 | expression tree. The caller owns the returning string, so should | |
3134 | free() it eventually. Errors are indicated via as_bad() and a NULL | |
3135 | return value. */ | |
3136 | ||
3137 | char * | |
3138 | symbol_relc_make_expr (expressionS * exp) | |
3139 | { | |
b9bb4a93 | 3140 | const char * opstr = NULL; /* Operator prefix string. */ |
280d71bf DB |
3141 | int arity = 0; /* Arity of this operator. */ |
3142 | char * operands[3]; /* Up to three operands. */ | |
3143 | char * concat_string = NULL; | |
3144 | ||
3145 | operands[0] = operands[1] = operands[2] = NULL; | |
3146 | ||
9c2799c2 | 3147 | gas_assert (exp != NULL); |
280d71bf DB |
3148 | |
3149 | /* Match known operators -> fill in opstr, arity, operands[] and fall | |
34bca508 | 3150 | through to construct subexpression fragments; may instead return |
280d71bf DB |
3151 | string directly for leaf nodes. */ |
3152 | ||
34bca508 | 3153 | /* See expr.h for the meaning of all these enums. Many operators |
280d71bf DB |
3154 | have an unnatural arity (X_add_number implicitly added). The |
3155 | conversion logic expands them to explicit "+" subexpressions. */ | |
3156 | ||
3157 | switch (exp->X_op) | |
3158 | { | |
3159 | default: | |
3160 | as_bad ("Unknown expression operator (enum %d)", exp->X_op); | |
3161 | break; | |
3162 | ||
3163 | /* Leaf nodes. */ | |
3164 | case O_constant: | |
3165 | return symbol_relc_make_value (exp->X_add_number); | |
3166 | ||
3167 | case O_symbol: | |
34bca508 L |
3168 | if (exp->X_add_number) |
3169 | { | |
3170 | arity = 2; | |
3171 | opstr = "+"; | |
280d71bf DB |
3172 | operands[0] = symbol_relc_make_sym (exp->X_add_symbol); |
3173 | operands[1] = symbol_relc_make_value (exp->X_add_number); | |
3174 | break; | |
3175 | } | |
3176 | else | |
3177 | return symbol_relc_make_sym (exp->X_add_symbol); | |
3178 | ||
3179 | /* Helper macros for nesting nodes. */ | |
3180 | ||
3181 | #define HANDLE_XADD_OPT1(str_) \ | |
3182 | if (exp->X_add_number) \ | |
3183 | { \ | |
3184 | arity = 2; \ | |
3185 | opstr = "+:" str_; \ | |
3186 | operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \ | |
3187 | operands[1] = symbol_relc_make_value (exp->X_add_number); \ | |
3188 | break; \ | |
3189 | } \ | |
3190 | else \ | |
3191 | { \ | |
3192 | arity = 1; \ | |
3193 | opstr = str_; \ | |
3194 | operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \ | |
3195 | } \ | |
3196 | break | |
34bca508 | 3197 | |
280d71bf DB |
3198 | #define HANDLE_XADD_OPT2(str_) \ |
3199 | if (exp->X_add_number) \ | |
3200 | { \ | |
3201 | arity = 3; \ | |
3202 | opstr = "+:" str_; \ | |
3203 | operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \ | |
3204 | operands[1] = symbol_relc_make_sym (exp->X_op_symbol); \ | |
3205 | operands[2] = symbol_relc_make_value (exp->X_add_number); \ | |
3206 | } \ | |
3207 | else \ | |
3208 | { \ | |
3209 | arity = 2; \ | |
3210 | opstr = str_; \ | |
3211 | operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \ | |
3212 | operands[1] = symbol_relc_make_sym (exp->X_op_symbol); \ | |
3213 | } \ | |
3214 | break | |
3215 | ||
3216 | /* Nesting nodes. */ | |
3217 | ||
3218 | case O_uminus: HANDLE_XADD_OPT1 ("0-"); | |
3219 | case O_bit_not: HANDLE_XADD_OPT1 ("~"); | |
3220 | case O_logical_not: HANDLE_XADD_OPT1 ("!"); | |
3221 | case O_multiply: HANDLE_XADD_OPT2 ("*"); | |
3222 | case O_divide: HANDLE_XADD_OPT2 ("/"); | |
3223 | case O_modulus: HANDLE_XADD_OPT2 ("%"); | |
3224 | case O_left_shift: HANDLE_XADD_OPT2 ("<<"); | |
3225 | case O_right_shift: HANDLE_XADD_OPT2 (">>"); | |
3226 | case O_bit_inclusive_or: HANDLE_XADD_OPT2 ("|"); | |
3227 | case O_bit_exclusive_or: HANDLE_XADD_OPT2 ("^"); | |
3228 | case O_bit_and: HANDLE_XADD_OPT2 ("&"); | |
3229 | case O_add: HANDLE_XADD_OPT2 ("+"); | |
3230 | case O_subtract: HANDLE_XADD_OPT2 ("-"); | |
3231 | case O_eq: HANDLE_XADD_OPT2 ("=="); | |
3232 | case O_ne: HANDLE_XADD_OPT2 ("!="); | |
3233 | case O_lt: HANDLE_XADD_OPT2 ("<"); | |
3234 | case O_le: HANDLE_XADD_OPT2 ("<="); | |
3235 | case O_ge: HANDLE_XADD_OPT2 (">="); | |
3236 | case O_gt: HANDLE_XADD_OPT2 (">"); | |
3237 | case O_logical_and: HANDLE_XADD_OPT2 ("&&"); | |
3238 | case O_logical_or: HANDLE_XADD_OPT2 ("||"); | |
3239 | } | |
3240 | ||
3241 | /* Validate & reject early. */ | |
3242 | if (arity >= 1 && ((operands[0] == NULL) || (strlen (operands[0]) == 0))) | |
3243 | opstr = NULL; | |
3244 | if (arity >= 2 && ((operands[1] == NULL) || (strlen (operands[1]) == 0))) | |
3245 | opstr = NULL; | |
3246 | if (arity >= 3 && ((operands[2] == NULL) || (strlen (operands[2]) == 0))) | |
3247 | opstr = NULL; | |
3248 | ||
3249 | if (opstr == NULL) | |
3250 | concat_string = NULL; | |
29a2809e TS |
3251 | else if (arity == 0) |
3252 | concat_string = xstrdup (opstr); | |
3253 | else if (arity == 1) | |
3254 | concat_string = concat (opstr, ":", operands[0], (char *) NULL); | |
3255 | else if (arity == 2) | |
3256 | concat_string = concat (opstr, ":", operands[0], ":", operands[1], | |
3257 | (char *) NULL); | |
280d71bf | 3258 | else |
29a2809e TS |
3259 | concat_string = concat (opstr, ":", operands[0], ":", operands[1], ":", |
3260 | operands[2], (char *) NULL); | |
280d71bf DB |
3261 | |
3262 | /* Free operand strings (not opstr). */ | |
3263 | if (arity >= 1) xfree (operands[0]); | |
3264 | if (arity >= 2) xfree (operands[1]); | |
3265 | if (arity >= 3) xfree (operands[2]); | |
3266 | ||
3267 | return concat_string; | |
3268 | } | |
3269 | ||
3270 | #endif |