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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; |
91d6fa6a | 1564 | *valueP = exp.X_add_number; |
9497f5ac NC |
1565 | *segP = symbolP->bsym->section; |
1566 | *fragPP = symbolP->sy_frag; | |
1567 | ||
1568 | if (*segP == expr_section) | |
91d6fa6a | 1569 | switch (exp.X_op) |
9497f5ac NC |
1570 | { |
1571 | case O_constant: *segP = absolute_section; break; | |
1572 | case O_register: *segP = reg_section; break; | |
1573 | default: break; | |
1574 | } | |
1575 | } | |
1576 | ||
1577 | return 1; | |
1578 | } | |
1579 | ||
252b5132 RH |
1580 | /* Dollar labels look like a number followed by a dollar sign. Eg, "42$". |
1581 | They are *really* local. That is, they go out of scope whenever we see a | |
1582 | label that isn't local. Also, like fb labels, there can be multiple | |
1583 | instances of a dollar label. Therefor, we name encode each instance with | |
1584 | the instance number, keep a list of defined symbols separate from the real | |
1585 | symbol table, and we treat these buggers as a sparse array. */ | |
1586 | ||
1587 | static long *dollar_labels; | |
1588 | static long *dollar_label_instances; | |
1589 | static char *dollar_label_defines; | |
1590 | static unsigned long dollar_label_count; | |
1591 | static unsigned long dollar_label_max; | |
1592 | ||
7c743825 | 1593 | int |
74937d39 | 1594 | dollar_label_defined (long label) |
252b5132 RH |
1595 | { |
1596 | long *i; | |
1597 | ||
1598 | know ((dollar_labels != NULL) || (dollar_label_count == 0)); | |
1599 | ||
1600 | for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) | |
1601 | if (*i == label) | |
1602 | return dollar_label_defines[i - dollar_labels]; | |
1603 | ||
7c743825 | 1604 | /* If we get here, label isn't defined. */ |
252b5132 | 1605 | return 0; |
7c743825 | 1606 | } |
252b5132 RH |
1607 | |
1608 | static long | |
74937d39 | 1609 | dollar_label_instance (long label) |
252b5132 RH |
1610 | { |
1611 | long *i; | |
1612 | ||
1613 | know ((dollar_labels != NULL) || (dollar_label_count == 0)); | |
1614 | ||
1615 | for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) | |
1616 | if (*i == label) | |
1617 | return (dollar_label_instances[i - dollar_labels]); | |
1618 | ||
7c743825 KH |
1619 | /* If we get here, we haven't seen the label before. |
1620 | Therefore its instance count is zero. */ | |
252b5132 RH |
1621 | return 0; |
1622 | } | |
1623 | ||
7c743825 | 1624 | void |
74937d39 | 1625 | dollar_label_clear (void) |
252b5132 RH |
1626 | { |
1627 | memset (dollar_label_defines, '\0', (unsigned int) dollar_label_count); | |
1628 | } | |
1629 | ||
1630 | #define DOLLAR_LABEL_BUMP_BY 10 | |
1631 | ||
7c743825 | 1632 | void |
74937d39 | 1633 | define_dollar_label (long label) |
252b5132 RH |
1634 | { |
1635 | long *i; | |
1636 | ||
1637 | for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i) | |
1638 | if (*i == label) | |
1639 | { | |
1640 | ++dollar_label_instances[i - dollar_labels]; | |
1641 | dollar_label_defines[i - dollar_labels] = 1; | |
1642 | return; | |
1643 | } | |
1644 | ||
7c743825 | 1645 | /* If we get to here, we don't have label listed yet. */ |
252b5132 RH |
1646 | |
1647 | if (dollar_labels == NULL) | |
1648 | { | |
325801bd TS |
1649 | dollar_labels = XNEWVEC (long, DOLLAR_LABEL_BUMP_BY); |
1650 | dollar_label_instances = XNEWVEC (long, DOLLAR_LABEL_BUMP_BY); | |
add39d23 | 1651 | dollar_label_defines = XNEWVEC (char, DOLLAR_LABEL_BUMP_BY); |
252b5132 RH |
1652 | dollar_label_max = DOLLAR_LABEL_BUMP_BY; |
1653 | dollar_label_count = 0; | |
1654 | } | |
1655 | else if (dollar_label_count == dollar_label_max) | |
1656 | { | |
1657 | dollar_label_max += DOLLAR_LABEL_BUMP_BY; | |
325801bd TS |
1658 | dollar_labels = XRESIZEVEC (long, dollar_labels, dollar_label_max); |
1659 | dollar_label_instances = XRESIZEVEC (long, dollar_label_instances, | |
1660 | dollar_label_max); | |
add39d23 TS |
1661 | dollar_label_defines = XRESIZEVEC (char, dollar_label_defines, |
1662 | dollar_label_max); | |
7c743825 | 1663 | } /* if we needed to grow */ |
252b5132 RH |
1664 | |
1665 | dollar_labels[dollar_label_count] = label; | |
1666 | dollar_label_instances[dollar_label_count] = 1; | |
1667 | dollar_label_defines[dollar_label_count] = 1; | |
1668 | ++dollar_label_count; | |
1669 | } | |
1670 | ||
7c743825 KH |
1671 | /* Caller must copy returned name: we re-use the area for the next name. |
1672 | ||
2b0f3761 | 1673 | The mth occurrence of label n: is turned into the symbol "Ln^Am" |
7c743825 KH |
1674 | where n is the label number and m is the instance number. "L" makes |
1675 | it a label discarded unless debugging and "^A"('\1') ensures no | |
1676 | ordinary symbol SHOULD get the same name as a local label | |
1677 | symbol. The first "4:" is "L4^A1" - the m numbers begin at 1. | |
1678 | ||
1679 | fb labels get the same treatment, except that ^B is used in place | |
1680 | of ^A. */ | |
1681 | ||
1682 | char * /* Return local label name. */ | |
ed9e98c2 AM |
1683 | dollar_label_name (long n, /* we just saw "n$:" : n a number. */ |
1684 | int augend /* 0 for current instance, 1 for new instance. */) | |
252b5132 RH |
1685 | { |
1686 | long i; | |
7c743825 | 1687 | /* Returned to caller, then copied. Used for created names ("4f"). */ |
252b5132 | 1688 | static char symbol_name_build[24]; |
ed9e98c2 AM |
1689 | char *p; |
1690 | char *q; | |
7c743825 | 1691 | char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */ |
252b5132 RH |
1692 | |
1693 | know (n >= 0); | |
1694 | know (augend == 0 || augend == 1); | |
1695 | p = symbol_name_build; | |
f84dd1f0 NC |
1696 | #ifdef LOCAL_LABEL_PREFIX |
1697 | *p++ = LOCAL_LABEL_PREFIX; | |
1698 | #endif | |
252b5132 RH |
1699 | *p++ = 'L'; |
1700 | ||
7c743825 KH |
1701 | /* Next code just does sprintf( {}, "%d", n); */ |
1702 | /* Label number. */ | |
252b5132 RH |
1703 | q = symbol_name_temporary; |
1704 | for (*q++ = 0, i = n; i; ++q) | |
1705 | { | |
1706 | *q = i % 10 + '0'; | |
1707 | i /= 10; | |
1708 | } | |
1709 | while ((*p = *--q) != '\0') | |
1710 | ++p; | |
1711 | ||
aa257fcd | 1712 | *p++ = DOLLAR_LABEL_CHAR; /* ^A */ |
252b5132 | 1713 | |
7c743825 | 1714 | /* Instance number. */ |
252b5132 RH |
1715 | q = symbol_name_temporary; |
1716 | for (*q++ = 0, i = dollar_label_instance (n) + augend; i; ++q) | |
1717 | { | |
1718 | *q = i % 10 + '0'; | |
1719 | i /= 10; | |
1720 | } | |
5bb3703f | 1721 | while ((*p++ = *--q) != '\0'); |
252b5132 | 1722 | |
7c743825 | 1723 | /* The label, as a '\0' ended string, starts at symbol_name_build. */ |
252b5132 RH |
1724 | return symbol_name_build; |
1725 | } | |
1726 | ||
47eebc20 | 1727 | /* Somebody else's idea of local labels. They are made by "n:" where n |
7c743825 KH |
1728 | is any decimal digit. Refer to them with |
1729 | "nb" for previous (backward) n: | |
1730 | or "nf" for next (forward) n:. | |
1731 | ||
1732 | We do a little better and let n be any number, not just a single digit, but | |
1733 | since the other guy's assembler only does ten, we treat the first ten | |
1734 | specially. | |
1735 | ||
1736 | Like someone else's assembler, we have one set of local label counters for | |
1737 | entire assembly, not one set per (sub)segment like in most assemblers. This | |
1738 | implies that one can refer to a label in another segment, and indeed some | |
1739 | crufty compilers have done just that. | |
1740 | ||
1741 | Since there could be a LOT of these things, treat them as a sparse | |
1742 | array. */ | |
252b5132 RH |
1743 | |
1744 | #define FB_LABEL_SPECIAL (10) | |
1745 | ||
1746 | static long fb_low_counter[FB_LABEL_SPECIAL]; | |
1747 | static long *fb_labels; | |
1748 | static long *fb_label_instances; | |
1749 | static long fb_label_count; | |
1750 | static long fb_label_max; | |
1751 | ||
7c743825 | 1752 | /* This must be more than FB_LABEL_SPECIAL. */ |
252b5132 RH |
1753 | #define FB_LABEL_BUMP_BY (FB_LABEL_SPECIAL + 6) |
1754 | ||
7c743825 | 1755 | static void |
74937d39 | 1756 | fb_label_init (void) |
252b5132 RH |
1757 | { |
1758 | memset ((void *) fb_low_counter, '\0', sizeof (fb_low_counter)); | |
7c743825 | 1759 | } |
252b5132 | 1760 | |
7c743825 KH |
1761 | /* Add one to the instance number of this fb label. */ |
1762 | ||
1763 | void | |
74937d39 | 1764 | fb_label_instance_inc (long label) |
252b5132 RH |
1765 | { |
1766 | long *i; | |
1767 | ||
b4e6cb80 | 1768 | if ((unsigned long) label < FB_LABEL_SPECIAL) |
252b5132 RH |
1769 | { |
1770 | ++fb_low_counter[label]; | |
1771 | return; | |
1772 | } | |
1773 | ||
1774 | if (fb_labels != NULL) | |
1775 | { | |
1776 | for (i = fb_labels + FB_LABEL_SPECIAL; | |
1777 | i < fb_labels + fb_label_count; ++i) | |
1778 | { | |
1779 | if (*i == label) | |
1780 | { | |
1781 | ++fb_label_instances[i - fb_labels]; | |
1782 | return; | |
7c743825 KH |
1783 | } /* if we find it */ |
1784 | } /* for each existing label */ | |
252b5132 RH |
1785 | } |
1786 | ||
7c743825 | 1787 | /* If we get to here, we don't have label listed yet. */ |
252b5132 RH |
1788 | |
1789 | if (fb_labels == NULL) | |
1790 | { | |
325801bd TS |
1791 | fb_labels = XNEWVEC (long, FB_LABEL_BUMP_BY); |
1792 | fb_label_instances = XNEWVEC (long, FB_LABEL_BUMP_BY); | |
252b5132 RH |
1793 | fb_label_max = FB_LABEL_BUMP_BY; |
1794 | fb_label_count = FB_LABEL_SPECIAL; | |
1795 | ||
1796 | } | |
1797 | else if (fb_label_count == fb_label_max) | |
1798 | { | |
1799 | fb_label_max += FB_LABEL_BUMP_BY; | |
325801bd TS |
1800 | fb_labels = XRESIZEVEC (long, fb_labels, fb_label_max); |
1801 | fb_label_instances = XRESIZEVEC (long, fb_label_instances, fb_label_max); | |
7c743825 | 1802 | } /* if we needed to grow */ |
252b5132 RH |
1803 | |
1804 | fb_labels[fb_label_count] = label; | |
1805 | fb_label_instances[fb_label_count] = 1; | |
1806 | ++fb_label_count; | |
1807 | } | |
1808 | ||
7c743825 | 1809 | static long |
74937d39 | 1810 | fb_label_instance (long label) |
252b5132 RH |
1811 | { |
1812 | long *i; | |
1813 | ||
b4e6cb80 | 1814 | if ((unsigned long) label < FB_LABEL_SPECIAL) |
252b5132 RH |
1815 | { |
1816 | return (fb_low_counter[label]); | |
1817 | } | |
1818 | ||
1819 | if (fb_labels != NULL) | |
1820 | { | |
1821 | for (i = fb_labels + FB_LABEL_SPECIAL; | |
1822 | i < fb_labels + fb_label_count; ++i) | |
1823 | { | |
1824 | if (*i == label) | |
1825 | { | |
1826 | return (fb_label_instances[i - fb_labels]); | |
7c743825 KH |
1827 | } /* if we find it */ |
1828 | } /* for each existing label */ | |
252b5132 RH |
1829 | } |
1830 | ||
1831 | /* We didn't find the label, so this must be a reference to the | |
1832 | first instance. */ | |
1833 | return 0; | |
1834 | } | |
1835 | ||
7c743825 KH |
1836 | /* Caller must copy returned name: we re-use the area for the next name. |
1837 | ||
2b0f3761 | 1838 | The mth occurrence of label n: is turned into the symbol "Ln^Bm" |
7c743825 KH |
1839 | where n is the label number and m is the instance number. "L" makes |
1840 | it a label discarded unless debugging and "^B"('\2') ensures no | |
1841 | ordinary symbol SHOULD get the same name as a local label | |
1842 | symbol. The first "4:" is "L4^B1" - the m numbers begin at 1. | |
1843 | ||
1844 | dollar labels get the same treatment, except that ^A is used in | |
1845 | place of ^B. */ | |
1846 | ||
1847 | char * /* Return local label name. */ | |
74937d39 KH |
1848 | fb_label_name (long n, /* We just saw "n:", "nf" or "nb" : n a number. */ |
1849 | long augend /* 0 for nb, 1 for n:, nf. */) | |
252b5132 RH |
1850 | { |
1851 | long i; | |
7c743825 | 1852 | /* Returned to caller, then copied. Used for created names ("4f"). */ |
252b5132 | 1853 | static char symbol_name_build[24]; |
ed9e98c2 AM |
1854 | char *p; |
1855 | char *q; | |
7c743825 | 1856 | char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */ |
252b5132 RH |
1857 | |
1858 | know (n >= 0); | |
a76903bf | 1859 | #ifdef TC_MMIX |
71ba24a1 | 1860 | know ((unsigned long) augend <= 2 /* See mmix_fb_label. */); |
a76903bf | 1861 | #else |
71ba24a1 | 1862 | know ((unsigned long) augend <= 1); |
a76903bf | 1863 | #endif |
252b5132 | 1864 | p = symbol_name_build; |
aa257fcd NC |
1865 | #ifdef LOCAL_LABEL_PREFIX |
1866 | *p++ = LOCAL_LABEL_PREFIX; | |
1867 | #endif | |
252b5132 RH |
1868 | *p++ = 'L'; |
1869 | ||
7c743825 KH |
1870 | /* Next code just does sprintf( {}, "%d", n); */ |
1871 | /* Label number. */ | |
252b5132 RH |
1872 | q = symbol_name_temporary; |
1873 | for (*q++ = 0, i = n; i; ++q) | |
1874 | { | |
1875 | *q = i % 10 + '0'; | |
1876 | i /= 10; | |
1877 | } | |
1878 | while ((*p = *--q) != '\0') | |
1879 | ++p; | |
1880 | ||
aa257fcd | 1881 | *p++ = LOCAL_LABEL_CHAR; /* ^B */ |
252b5132 | 1882 | |
7c743825 | 1883 | /* Instance number. */ |
252b5132 RH |
1884 | q = symbol_name_temporary; |
1885 | for (*q++ = 0, i = fb_label_instance (n) + augend; i; ++q) | |
1886 | { | |
1887 | *q = i % 10 + '0'; | |
1888 | i /= 10; | |
1889 | } | |
5bb3703f | 1890 | while ((*p++ = *--q) != '\0'); |
252b5132 | 1891 | |
7c743825 | 1892 | /* The label, as a '\0' ended string, starts at symbol_name_build. */ |
252b5132 | 1893 | return (symbol_name_build); |
7c743825 | 1894 | } |
252b5132 | 1895 | |
7c743825 KH |
1896 | /* Decode name that may have been generated by foo_label_name() above. |
1897 | If the name wasn't generated by foo_label_name(), then return it | |
1898 | unaltered. This is used for error messages. */ | |
252b5132 RH |
1899 | |
1900 | char * | |
74937d39 | 1901 | decode_local_label_name (char *s) |
252b5132 RH |
1902 | { |
1903 | char *p; | |
1904 | char *symbol_decode; | |
1905 | int label_number; | |
1906 | int instance_number; | |
cd0bbe6e | 1907 | const char *type; |
d95767bf | 1908 | const char *message_format; |
91d6fa6a | 1909 | int lindex = 0; |
43ad3147 | 1910 | |
aa257fcd | 1911 | #ifdef LOCAL_LABEL_PREFIX |
91d6fa6a NC |
1912 | if (s[lindex] == LOCAL_LABEL_PREFIX) |
1913 | ++lindex; | |
aa257fcd | 1914 | #endif |
43ad3147 | 1915 | |
91d6fa6a | 1916 | if (s[lindex] != 'L') |
252b5132 RH |
1917 | return s; |
1918 | ||
91d6fa6a | 1919 | for (label_number = 0, p = s + lindex + 1; ISDIGIT (*p); ++p) |
252b5132 RH |
1920 | label_number = (10 * label_number) + *p - '0'; |
1921 | ||
aa257fcd | 1922 | if (*p == DOLLAR_LABEL_CHAR) |
252b5132 | 1923 | type = "dollar"; |
aa257fcd | 1924 | else if (*p == LOCAL_LABEL_CHAR) |
252b5132 RH |
1925 | type = "fb"; |
1926 | else | |
1927 | return s; | |
1928 | ||
3882b010 | 1929 | for (instance_number = 0, p++; ISDIGIT (*p); ++p) |
252b5132 RH |
1930 | instance_number = (10 * instance_number) + *p - '0'; |
1931 | ||
d95767bf | 1932 | message_format = _("\"%d\" (instance number %d of a %s label)"); |
1e9cc1c2 | 1933 | symbol_decode = (char *) obstack_alloc (¬es, strlen (message_format) + 30); |
252b5132 RH |
1934 | sprintf (symbol_decode, message_format, label_number, instance_number, type); |
1935 | ||
1936 | return symbol_decode; | |
1937 | } | |
1938 | ||
1939 | /* Get the value of a symbol. */ | |
1940 | ||
1941 | valueT | |
74937d39 | 1942 | S_GET_VALUE (symbolS *s) |
252b5132 | 1943 | { |
49309057 | 1944 | if (LOCAL_SYMBOL_CHECK (s)) |
ac62c346 | 1945 | return resolve_symbol_value (s); |
49309057 | 1946 | |
158184ac | 1947 | if (!s->sy_flags.sy_resolved) |
e46d99eb | 1948 | { |
6386f3a7 AM |
1949 | valueT val = resolve_symbol_value (s); |
1950 | if (!finalize_syms) | |
e46d99eb AM |
1951 | return val; |
1952 | } | |
06e77878 AO |
1953 | if (S_IS_WEAKREFR (s)) |
1954 | return S_GET_VALUE (s->sy_value.X_add_symbol); | |
1955 | ||
252b5132 RH |
1956 | if (s->sy_value.X_op != O_constant) |
1957 | { | |
158184ac | 1958 | if (! s->sy_flags.sy_resolved |
252b5132 RH |
1959 | || s->sy_value.X_op != O_symbol |
1960 | || (S_IS_DEFINED (s) && ! S_IS_COMMON (s))) | |
0e389e77 | 1961 | as_bad (_("attempt to get value of unresolved symbol `%s'"), |
252b5132 | 1962 | S_GET_NAME (s)); |
252b5132 RH |
1963 | } |
1964 | return (valueT) s->sy_value.X_add_number; | |
1965 | } | |
1966 | ||
1967 | /* Set the value of a symbol. */ | |
1968 | ||
1969 | void | |
74937d39 | 1970 | S_SET_VALUE (symbolS *s, valueT val) |
252b5132 | 1971 | { |
49309057 ILT |
1972 | if (LOCAL_SYMBOL_CHECK (s)) |
1973 | { | |
bd780143 | 1974 | ((struct local_symbol *) s)->lsy_value = val; |
49309057 ILT |
1975 | return; |
1976 | } | |
1977 | ||
252b5132 RH |
1978 | s->sy_value.X_op = O_constant; |
1979 | s->sy_value.X_add_number = (offsetT) val; | |
1980 | s->sy_value.X_unsigned = 0; | |
06e77878 | 1981 | S_CLEAR_WEAKREFR (s); |
252b5132 RH |
1982 | } |
1983 | ||
1984 | void | |
74937d39 | 1985 | copy_symbol_attributes (symbolS *dest, symbolS *src) |
252b5132 | 1986 | { |
49309057 | 1987 | if (LOCAL_SYMBOL_CHECK (dest)) |
7f2f689c | 1988 | dest = local_symbol_convert ((struct local_symbol *) dest); |
49309057 | 1989 | if (LOCAL_SYMBOL_CHECK (src)) |
7f2f689c | 1990 | src = local_symbol_convert ((struct local_symbol *) src); |
49309057 | 1991 | |
252b5132 RH |
1992 | /* In an expression, transfer the settings of these flags. |
1993 | The user can override later, of course. */ | |
ad04f5ce L |
1994 | #define COPIED_SYMFLAGS (BSF_FUNCTION | BSF_OBJECT \ |
1995 | | BSF_GNU_INDIRECT_FUNCTION) | |
252b5132 | 1996 | dest->bsym->flags |= src->bsym->flags & COPIED_SYMFLAGS; |
252b5132 RH |
1997 | |
1998 | #ifdef OBJ_COPY_SYMBOL_ATTRIBUTES | |
1999 | OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src); | |
2000 | #endif | |
794ba86a DJ |
2001 | |
2002 | #ifdef TC_COPY_SYMBOL_ATTRIBUTES | |
2003 | TC_COPY_SYMBOL_ATTRIBUTES (dest, src); | |
2004 | #endif | |
252b5132 RH |
2005 | } |
2006 | ||
252b5132 | 2007 | int |
74937d39 | 2008 | S_IS_FUNCTION (symbolS *s) |
252b5132 | 2009 | { |
49309057 ILT |
2010 | flagword flags; |
2011 | ||
2012 | if (LOCAL_SYMBOL_CHECK (s)) | |
2013 | return 0; | |
2014 | ||
2015 | flags = s->bsym->flags; | |
252b5132 RH |
2016 | |
2017 | return (flags & BSF_FUNCTION) != 0; | |
2018 | } | |
2019 | ||
2020 | int | |
74937d39 | 2021 | S_IS_EXTERNAL (symbolS *s) |
252b5132 | 2022 | { |
49309057 ILT |
2023 | flagword flags; |
2024 | ||
2025 | if (LOCAL_SYMBOL_CHECK (s)) | |
2026 | return 0; | |
2027 | ||
2028 | flags = s->bsym->flags; | |
252b5132 | 2029 | |
7c743825 | 2030 | /* Sanity check. */ |
252b5132 RH |
2031 | if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL)) |
2032 | abort (); | |
2033 | ||
2034 | return (flags & BSF_GLOBAL) != 0; | |
2035 | } | |
2036 | ||
2037 | int | |
74937d39 | 2038 | S_IS_WEAK (symbolS *s) |
252b5132 | 2039 | { |
49309057 ILT |
2040 | if (LOCAL_SYMBOL_CHECK (s)) |
2041 | return 0; | |
06e77878 AO |
2042 | /* Conceptually, a weakrefr is weak if the referenced symbol is. We |
2043 | could probably handle a WEAKREFR as always weak though. E.g., if | |
2044 | the referenced symbol has lost its weak status, there's no reason | |
2045 | to keep handling the weakrefr as if it was weak. */ | |
2046 | if (S_IS_WEAKREFR (s)) | |
2047 | return S_IS_WEAK (s->sy_value.X_add_symbol); | |
252b5132 RH |
2048 | return (s->bsym->flags & BSF_WEAK) != 0; |
2049 | } | |
2050 | ||
06e77878 AO |
2051 | int |
2052 | S_IS_WEAKREFR (symbolS *s) | |
2053 | { | |
2054 | if (LOCAL_SYMBOL_CHECK (s)) | |
2055 | return 0; | |
158184ac | 2056 | return s->sy_flags.sy_weakrefr != 0; |
06e77878 AO |
2057 | } |
2058 | ||
2059 | int | |
2060 | S_IS_WEAKREFD (symbolS *s) | |
2061 | { | |
2062 | if (LOCAL_SYMBOL_CHECK (s)) | |
2063 | return 0; | |
158184ac | 2064 | return s->sy_flags.sy_weakrefd != 0; |
06e77878 AO |
2065 | } |
2066 | ||
252b5132 | 2067 | int |
74937d39 | 2068 | S_IS_COMMON (symbolS *s) |
252b5132 | 2069 | { |
49309057 ILT |
2070 | if (LOCAL_SYMBOL_CHECK (s)) |
2071 | return 0; | |
252b5132 RH |
2072 | return bfd_is_com_section (s->bsym->section); |
2073 | } | |
2074 | ||
2075 | int | |
74937d39 | 2076 | S_IS_DEFINED (symbolS *s) |
252b5132 | 2077 | { |
49309057 ILT |
2078 | if (LOCAL_SYMBOL_CHECK (s)) |
2079 | return ((struct local_symbol *) s)->lsy_section != undefined_section; | |
252b5132 RH |
2080 | return s->bsym->section != undefined_section; |
2081 | } | |
2082 | ||
a161fe53 AM |
2083 | |
2084 | #ifndef EXTERN_FORCE_RELOC | |
2085 | #define EXTERN_FORCE_RELOC IS_ELF | |
2086 | #endif | |
2087 | ||
2088 | /* Return true for symbols that should not be reduced to section | |
2089 | symbols or eliminated from expressions, because they may be | |
2090 | overridden by the linker. */ | |
2091 | int | |
74937d39 | 2092 | S_FORCE_RELOC (symbolS *s, int strict) |
a161fe53 AM |
2093 | { |
2094 | if (LOCAL_SYMBOL_CHECK (s)) | |
2095 | return ((struct local_symbol *) s)->lsy_section == undefined_section; | |
2096 | ||
ae6063d4 AM |
2097 | return ((strict |
2098 | && ((s->bsym->flags & BSF_WEAK) != 0 | |
2099 | || (EXTERN_FORCE_RELOC | |
2100 | && (s->bsym->flags & BSF_GLOBAL) != 0))) | |
c969da64 | 2101 | || (s->bsym->flags & BSF_GNU_INDIRECT_FUNCTION) != 0 |
a161fe53 AM |
2102 | || s->bsym->section == undefined_section |
2103 | || bfd_is_com_section (s->bsym->section)); | |
2104 | } | |
2105 | ||
252b5132 | 2106 | int |
74937d39 | 2107 | S_IS_DEBUG (symbolS *s) |
252b5132 | 2108 | { |
49309057 ILT |
2109 | if (LOCAL_SYMBOL_CHECK (s)) |
2110 | return 0; | |
252b5132 RH |
2111 | if (s->bsym->flags & BSF_DEBUGGING) |
2112 | return 1; | |
2113 | return 0; | |
2114 | } | |
2115 | ||
2116 | int | |
74937d39 | 2117 | S_IS_LOCAL (symbolS *s) |
252b5132 | 2118 | { |
49309057 | 2119 | flagword flags; |
252b5132 RH |
2120 | const char *name; |
2121 | ||
49309057 ILT |
2122 | if (LOCAL_SYMBOL_CHECK (s)) |
2123 | return 1; | |
2124 | ||
2125 | flags = s->bsym->flags; | |
2126 | ||
7c743825 | 2127 | /* Sanity check. */ |
252b5132 RH |
2128 | if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL)) |
2129 | abort (); | |
2130 | ||
2131 | if (bfd_get_section (s->bsym) == reg_section) | |
2132 | return 1; | |
2133 | ||
2134 | if (flag_strip_local_absolute | |
bb82af9f NC |
2135 | /* Keep BSF_FILE symbols in order to allow debuggers to identify |
2136 | the source file even when the object file is stripped. */ | |
2137 | && (flags & (BSF_GLOBAL | BSF_FILE)) == 0 | |
252b5132 RH |
2138 | && bfd_get_section (s->bsym) == absolute_section) |
2139 | return 1; | |
2140 | ||
2141 | name = S_GET_NAME (s); | |
2142 | return (name != NULL | |
2143 | && ! S_IS_DEBUG (s) | |
aa257fcd NC |
2144 | && (strchr (name, DOLLAR_LABEL_CHAR) |
2145 | || strchr (name, LOCAL_LABEL_CHAR) | |
df58fc94 | 2146 | || TC_LABEL_IS_LOCAL (name) |
252b5132 RH |
2147 | || (! flag_keep_locals |
2148 | && (bfd_is_local_label (stdoutput, s->bsym) | |
2149 | || (flag_mri | |
2150 | && name[0] == '?' | |
2151 | && name[1] == '?'))))); | |
2152 | } | |
2153 | ||
252b5132 | 2154 | int |
74937d39 | 2155 | S_IS_STABD (symbolS *s) |
252b5132 RH |
2156 | { |
2157 | return S_GET_NAME (s) == 0; | |
2158 | } | |
2159 | ||
6885131b AM |
2160 | int |
2161 | S_CAN_BE_REDEFINED (const symbolS *s) | |
2162 | { | |
2163 | if (LOCAL_SYMBOL_CHECK (s)) | |
2164 | return (local_symbol_get_frag ((struct local_symbol *) s) | |
2165 | == &predefined_address_frag); | |
2166 | /* Permit register names to be redefined. */ | |
2167 | return s->bsym->section == reg_section; | |
2168 | } | |
2169 | ||
9497f5ac NC |
2170 | int |
2171 | S_IS_VOLATILE (const symbolS *s) | |
2172 | { | |
2173 | if (LOCAL_SYMBOL_CHECK (s)) | |
2174 | return 0; | |
158184ac | 2175 | return s->sy_flags.sy_volatile; |
9497f5ac NC |
2176 | } |
2177 | ||
2178 | int | |
2179 | S_IS_FORWARD_REF (const symbolS *s) | |
2180 | { | |
2181 | if (LOCAL_SYMBOL_CHECK (s)) | |
2182 | return 0; | |
158184ac | 2183 | return s->sy_flags.sy_forward_ref; |
9497f5ac NC |
2184 | } |
2185 | ||
9758f3fc | 2186 | const char * |
74937d39 | 2187 | S_GET_NAME (symbolS *s) |
252b5132 | 2188 | { |
49309057 ILT |
2189 | if (LOCAL_SYMBOL_CHECK (s)) |
2190 | return ((struct local_symbol *) s)->lsy_name; | |
252b5132 RH |
2191 | return s->bsym->name; |
2192 | } | |
2193 | ||
2194 | segT | |
74937d39 | 2195 | S_GET_SEGMENT (symbolS *s) |
252b5132 | 2196 | { |
49309057 ILT |
2197 | if (LOCAL_SYMBOL_CHECK (s)) |
2198 | return ((struct local_symbol *) s)->lsy_section; | |
252b5132 RH |
2199 | return s->bsym->section; |
2200 | } | |
2201 | ||
2202 | void | |
74937d39 | 2203 | S_SET_SEGMENT (symbolS *s, segT seg) |
252b5132 RH |
2204 | { |
2205 | /* Don't reassign section symbols. The direct reason is to prevent seg | |
2206 | faults assigning back to const global symbols such as *ABS*, but it | |
2207 | shouldn't happen anyway. */ | |
2208 | ||
49309057 ILT |
2209 | if (LOCAL_SYMBOL_CHECK (s)) |
2210 | { | |
2211 | if (seg == reg_section) | |
2212 | s = local_symbol_convert ((struct local_symbol *) s); | |
2213 | else | |
2214 | { | |
2215 | ((struct local_symbol *) s)->lsy_section = seg; | |
2216 | return; | |
2217 | } | |
2218 | } | |
2219 | ||
252b5132 RH |
2220 | if (s->bsym->flags & BSF_SECTION_SYM) |
2221 | { | |
2222 | if (s->bsym->section != seg) | |
7c743825 | 2223 | abort (); |
252b5132 RH |
2224 | } |
2225 | else | |
2226 | s->bsym->section = seg; | |
2227 | } | |
2228 | ||
2229 | void | |
74937d39 | 2230 | S_SET_EXTERNAL (symbolS *s) |
252b5132 | 2231 | { |
49309057 ILT |
2232 | if (LOCAL_SYMBOL_CHECK (s)) |
2233 | s = local_symbol_convert ((struct local_symbol *) s); | |
252b5132 RH |
2234 | if ((s->bsym->flags & BSF_WEAK) != 0) |
2235 | { | |
2236 | /* Let .weak override .global. */ | |
2237 | return; | |
2238 | } | |
4d7c34bf NC |
2239 | if (s->bsym->flags & BSF_SECTION_SYM) |
2240 | { | |
4d7c34bf | 2241 | /* Do not reassign section symbols. */ |
3b4dbbbf | 2242 | as_warn (_("section symbols are already global")); |
4d7c34bf NC |
2243 | return; |
2244 | } | |
97c4f2d9 | 2245 | #ifndef TC_GLOBAL_REGISTER_SYMBOL_OK |
d0548f34 L |
2246 | if (S_GET_SEGMENT (s) == reg_section) |
2247 | { | |
2248 | as_bad ("can't make register symbol `%s' global", | |
2249 | S_GET_NAME (s)); | |
2250 | return; | |
2251 | } | |
97c4f2d9 | 2252 | #endif |
252b5132 | 2253 | s->bsym->flags |= BSF_GLOBAL; |
7c743825 | 2254 | s->bsym->flags &= ~(BSF_LOCAL | BSF_WEAK); |
977cdf5a | 2255 | |
22ba0981 | 2256 | #ifdef TE_PE |
977cdf5a NC |
2257 | if (! an_external_name && S_GET_NAME(s)[0] != '.') |
2258 | an_external_name = S_GET_NAME (s); | |
2259 | #endif | |
252b5132 RH |
2260 | } |
2261 | ||
2262 | void | |
74937d39 | 2263 | S_CLEAR_EXTERNAL (symbolS *s) |
252b5132 | 2264 | { |
49309057 ILT |
2265 | if (LOCAL_SYMBOL_CHECK (s)) |
2266 | return; | |
252b5132 RH |
2267 | if ((s->bsym->flags & BSF_WEAK) != 0) |
2268 | { | |
2269 | /* Let .weak override. */ | |
2270 | return; | |
2271 | } | |
2272 | s->bsym->flags |= BSF_LOCAL; | |
7c743825 | 2273 | s->bsym->flags &= ~(BSF_GLOBAL | BSF_WEAK); |
252b5132 RH |
2274 | } |
2275 | ||
2276 | void | |
74937d39 | 2277 | S_SET_WEAK (symbolS *s) |
252b5132 | 2278 | { |
49309057 ILT |
2279 | if (LOCAL_SYMBOL_CHECK (s)) |
2280 | s = local_symbol_convert ((struct local_symbol *) s); | |
06e77878 AO |
2281 | #ifdef obj_set_weak_hook |
2282 | obj_set_weak_hook (s); | |
2283 | #endif | |
252b5132 | 2284 | s->bsym->flags |= BSF_WEAK; |
7c743825 | 2285 | s->bsym->flags &= ~(BSF_GLOBAL | BSF_LOCAL); |
252b5132 RH |
2286 | } |
2287 | ||
06e77878 AO |
2288 | void |
2289 | S_SET_WEAKREFR (symbolS *s) | |
2290 | { | |
2291 | if (LOCAL_SYMBOL_CHECK (s)) | |
2292 | s = local_symbol_convert ((struct local_symbol *) s); | |
158184ac | 2293 | s->sy_flags.sy_weakrefr = 1; |
06e77878 AO |
2294 | /* If the alias was already used, make sure we mark the target as |
2295 | used as well, otherwise it might be dropped from the symbol | |
2296 | table. This may have unintended side effects if the alias is | |
2297 | later redirected to another symbol, such as keeping the unused | |
2298 | previous target in the symbol table. Since it will be weak, it's | |
2299 | not a big deal. */ | |
158184ac | 2300 | if (s->sy_flags.sy_used) |
06e77878 AO |
2301 | symbol_mark_used (s->sy_value.X_add_symbol); |
2302 | } | |
2303 | ||
2304 | void | |
2305 | S_CLEAR_WEAKREFR (symbolS *s) | |
2306 | { | |
2307 | if (LOCAL_SYMBOL_CHECK (s)) | |
2308 | return; | |
158184ac | 2309 | s->sy_flags.sy_weakrefr = 0; |
06e77878 AO |
2310 | } |
2311 | ||
2312 | void | |
2313 | S_SET_WEAKREFD (symbolS *s) | |
2314 | { | |
2315 | if (LOCAL_SYMBOL_CHECK (s)) | |
2316 | s = local_symbol_convert ((struct local_symbol *) s); | |
158184ac | 2317 | s->sy_flags.sy_weakrefd = 1; |
06e77878 AO |
2318 | S_SET_WEAK (s); |
2319 | } | |
2320 | ||
2321 | void | |
2322 | S_CLEAR_WEAKREFD (symbolS *s) | |
2323 | { | |
2324 | if (LOCAL_SYMBOL_CHECK (s)) | |
2325 | return; | |
158184ac | 2326 | if (s->sy_flags.sy_weakrefd) |
06e77878 | 2327 | { |
158184ac | 2328 | s->sy_flags.sy_weakrefd = 0; |
06e77878 AO |
2329 | /* If a weakref target symbol is weak, then it was never |
2330 | referenced directly before, not even in a .global directive, | |
2331 | so decay it to local. If it remains undefined, it will be | |
2332 | later turned into a global, like any other undefined | |
2333 | symbol. */ | |
2334 | if (s->bsym->flags & BSF_WEAK) | |
2335 | { | |
2336 | #ifdef obj_clear_weak_hook | |
2337 | obj_clear_weak_hook (s); | |
2338 | #endif | |
2339 | s->bsym->flags &= ~BSF_WEAK; | |
2340 | s->bsym->flags |= BSF_LOCAL; | |
2341 | } | |
2342 | } | |
2343 | } | |
2344 | ||
00f7efb6 | 2345 | void |
74937d39 | 2346 | S_SET_THREAD_LOCAL (symbolS *s) |
00f7efb6 JJ |
2347 | { |
2348 | if (LOCAL_SYMBOL_CHECK (s)) | |
2349 | s = local_symbol_convert ((struct local_symbol *) s); | |
2350 | if (bfd_is_com_section (s->bsym->section) | |
2351 | && (s->bsym->flags & BSF_THREAD_LOCAL) != 0) | |
2352 | return; | |
2353 | s->bsym->flags |= BSF_THREAD_LOCAL; | |
2354 | if ((s->bsym->flags & BSF_FUNCTION) != 0) | |
2355 | as_bad (_("Accessing function `%s' as thread-local object"), | |
2356 | S_GET_NAME (s)); | |
2357 | else if (! bfd_is_und_section (s->bsym->section) | |
2358 | && (s->bsym->section->flags & SEC_THREAD_LOCAL) == 0) | |
2359 | as_bad (_("Accessing `%s' as thread-local object"), | |
2360 | S_GET_NAME (s)); | |
2361 | } | |
2362 | ||
252b5132 | 2363 | void |
977cdf5a | 2364 | S_SET_NAME (symbolS *s, const char *name) |
252b5132 | 2365 | { |
49309057 ILT |
2366 | if (LOCAL_SYMBOL_CHECK (s)) |
2367 | { | |
2368 | ((struct local_symbol *) s)->lsy_name = name; | |
2369 | return; | |
2370 | } | |
252b5132 RH |
2371 | s->bsym->name = name; |
2372 | } | |
49309057 | 2373 | |
9497f5ac NC |
2374 | void |
2375 | S_SET_VOLATILE (symbolS *s) | |
2376 | { | |
2377 | if (LOCAL_SYMBOL_CHECK (s)) | |
2378 | s = local_symbol_convert ((struct local_symbol *) s); | |
158184ac | 2379 | s->sy_flags.sy_volatile = 1; |
9497f5ac NC |
2380 | } |
2381 | ||
92757bc9 JB |
2382 | void |
2383 | S_CLEAR_VOLATILE (symbolS *s) | |
2384 | { | |
2385 | if (!LOCAL_SYMBOL_CHECK (s)) | |
158184ac | 2386 | s->sy_flags.sy_volatile = 0; |
92757bc9 JB |
2387 | } |
2388 | ||
9497f5ac NC |
2389 | void |
2390 | S_SET_FORWARD_REF (symbolS *s) | |
2391 | { | |
2392 | if (LOCAL_SYMBOL_CHECK (s)) | |
2393 | s = local_symbol_convert ((struct local_symbol *) s); | |
158184ac | 2394 | s->sy_flags.sy_forward_ref = 1; |
9497f5ac NC |
2395 | } |
2396 | ||
49309057 ILT |
2397 | /* Return the previous symbol in a chain. */ |
2398 | ||
2399 | symbolS * | |
74937d39 | 2400 | symbol_previous (symbolS *s) |
49309057 ILT |
2401 | { |
2402 | if (LOCAL_SYMBOL_CHECK (s)) | |
2403 | abort (); | |
2404 | return s->sy_previous; | |
2405 | } | |
2406 | ||
49309057 ILT |
2407 | /* Return the next symbol in a chain. */ |
2408 | ||
2409 | symbolS * | |
74937d39 | 2410 | symbol_next (symbolS *s) |
49309057 ILT |
2411 | { |
2412 | if (LOCAL_SYMBOL_CHECK (s)) | |
2413 | abort (); | |
2414 | return s->sy_next; | |
2415 | } | |
2416 | ||
2417 | /* Return a pointer to the value of a symbol as an expression. */ | |
2418 | ||
2419 | expressionS * | |
74937d39 | 2420 | symbol_get_value_expression (symbolS *s) |
49309057 ILT |
2421 | { |
2422 | if (LOCAL_SYMBOL_CHECK (s)) | |
2423 | s = local_symbol_convert ((struct local_symbol *) s); | |
2424 | return &s->sy_value; | |
2425 | } | |
2426 | ||
2427 | /* Set the value of a symbol to an expression. */ | |
2428 | ||
2429 | void | |
74937d39 | 2430 | symbol_set_value_expression (symbolS *s, const expressionS *exp) |
49309057 ILT |
2431 | { |
2432 | if (LOCAL_SYMBOL_CHECK (s)) | |
2433 | s = local_symbol_convert ((struct local_symbol *) s); | |
2434 | s->sy_value = *exp; | |
06e77878 | 2435 | S_CLEAR_WEAKREFR (s); |
49309057 ILT |
2436 | } |
2437 | ||
087d837e L |
2438 | /* Return whether 2 symbols are the same. */ |
2439 | ||
2440 | int | |
2441 | symbol_same_p (symbolS *s1, symbolS *s2) | |
2442 | { | |
158184ac | 2443 | if (s1->sy_flags.sy_local_symbol |
087d837e L |
2444 | && local_symbol_converted_p ((struct local_symbol *) s1)) |
2445 | s1 = local_symbol_get_real_symbol ((struct local_symbol *) s1); | |
158184ac | 2446 | if (s2->sy_flags.sy_local_symbol |
087d837e L |
2447 | && local_symbol_converted_p ((struct local_symbol *) s2)) |
2448 | s2 = local_symbol_get_real_symbol ((struct local_symbol *) s2); | |
2449 | return s1 == s2; | |
2450 | } | |
2451 | ||
be95a9c1 AM |
2452 | /* Return a pointer to the X_add_number component of a symbol. */ |
2453 | ||
514d955d | 2454 | offsetT * |
be95a9c1 AM |
2455 | symbol_X_add_number (symbolS *s) |
2456 | { | |
be95a9c1 | 2457 | if (LOCAL_SYMBOL_CHECK (s)) |
514d955d | 2458 | return (offsetT *) &((struct local_symbol *) s)->lsy_value; |
be95a9c1 | 2459 | |
514d955d | 2460 | return &s->sy_value.X_add_number; |
be95a9c1 AM |
2461 | } |
2462 | ||
b7d6ed97 RH |
2463 | /* Set the value of SYM to the current position in the current segment. */ |
2464 | ||
2465 | void | |
74937d39 | 2466 | symbol_set_value_now (symbolS *sym) |
b7d6ed97 RH |
2467 | { |
2468 | S_SET_SEGMENT (sym, now_seg); | |
2469 | S_SET_VALUE (sym, frag_now_fix ()); | |
2470 | symbol_set_frag (sym, frag_now); | |
2471 | } | |
2472 | ||
49309057 ILT |
2473 | /* Set the frag of a symbol. */ |
2474 | ||
2475 | void | |
74937d39 | 2476 | symbol_set_frag (symbolS *s, fragS *f) |
49309057 ILT |
2477 | { |
2478 | if (LOCAL_SYMBOL_CHECK (s)) | |
2479 | { | |
2480 | local_symbol_set_frag ((struct local_symbol *) s, f); | |
2481 | return; | |
2482 | } | |
2483 | s->sy_frag = f; | |
06e77878 | 2484 | S_CLEAR_WEAKREFR (s); |
49309057 ILT |
2485 | } |
2486 | ||
2487 | /* Return the frag of a symbol. */ | |
2488 | ||
2489 | fragS * | |
74937d39 | 2490 | symbol_get_frag (symbolS *s) |
49309057 ILT |
2491 | { |
2492 | if (LOCAL_SYMBOL_CHECK (s)) | |
2493 | return local_symbol_get_frag ((struct local_symbol *) s); | |
2494 | return s->sy_frag; | |
2495 | } | |
2496 | ||
2497 | /* Mark a symbol as having been used. */ | |
2498 | ||
2499 | void | |
74937d39 | 2500 | symbol_mark_used (symbolS *s) |
49309057 ILT |
2501 | { |
2502 | if (LOCAL_SYMBOL_CHECK (s)) | |
2503 | return; | |
158184ac | 2504 | s->sy_flags.sy_used = 1; |
06e77878 AO |
2505 | if (S_IS_WEAKREFR (s)) |
2506 | symbol_mark_used (s->sy_value.X_add_symbol); | |
49309057 ILT |
2507 | } |
2508 | ||
2509 | /* Clear the mark of whether a symbol has been used. */ | |
2510 | ||
2511 | void | |
74937d39 | 2512 | symbol_clear_used (symbolS *s) |
49309057 ILT |
2513 | { |
2514 | if (LOCAL_SYMBOL_CHECK (s)) | |
2515 | s = local_symbol_convert ((struct local_symbol *) s); | |
158184ac | 2516 | s->sy_flags.sy_used = 0; |
49309057 ILT |
2517 | } |
2518 | ||
2519 | /* Return whether a symbol has been used. */ | |
2520 | ||
2521 | int | |
74937d39 | 2522 | symbol_used_p (symbolS *s) |
49309057 ILT |
2523 | { |
2524 | if (LOCAL_SYMBOL_CHECK (s)) | |
2525 | return 1; | |
158184ac | 2526 | return s->sy_flags.sy_used; |
49309057 ILT |
2527 | } |
2528 | ||
2529 | /* Mark a symbol as having been used in a reloc. */ | |
2530 | ||
2531 | void | |
74937d39 | 2532 | symbol_mark_used_in_reloc (symbolS *s) |
49309057 ILT |
2533 | { |
2534 | if (LOCAL_SYMBOL_CHECK (s)) | |
2535 | s = local_symbol_convert ((struct local_symbol *) s); | |
158184ac | 2536 | s->sy_flags.sy_used_in_reloc = 1; |
49309057 ILT |
2537 | } |
2538 | ||
2539 | /* Clear the mark of whether a symbol has been used in a reloc. */ | |
2540 | ||
2541 | void | |
74937d39 | 2542 | symbol_clear_used_in_reloc (symbolS *s) |
49309057 ILT |
2543 | { |
2544 | if (LOCAL_SYMBOL_CHECK (s)) | |
2545 | return; | |
158184ac | 2546 | s->sy_flags.sy_used_in_reloc = 0; |
49309057 ILT |
2547 | } |
2548 | ||
2549 | /* Return whether a symbol has been used in a reloc. */ | |
2550 | ||
2551 | int | |
74937d39 | 2552 | symbol_used_in_reloc_p (symbolS *s) |
49309057 ILT |
2553 | { |
2554 | if (LOCAL_SYMBOL_CHECK (s)) | |
2555 | return 0; | |
158184ac | 2556 | return s->sy_flags.sy_used_in_reloc; |
49309057 ILT |
2557 | } |
2558 | ||
2559 | /* Mark a symbol as an MRI common symbol. */ | |
2560 | ||
2561 | void | |
74937d39 | 2562 | symbol_mark_mri_common (symbolS *s) |
49309057 ILT |
2563 | { |
2564 | if (LOCAL_SYMBOL_CHECK (s)) | |
2565 | s = local_symbol_convert ((struct local_symbol *) s); | |
158184ac | 2566 | s->sy_flags.sy_mri_common = 1; |
49309057 ILT |
2567 | } |
2568 | ||
2569 | /* Clear the mark of whether a symbol is an MRI common symbol. */ | |
2570 | ||
2571 | void | |
74937d39 | 2572 | symbol_clear_mri_common (symbolS *s) |
49309057 ILT |
2573 | { |
2574 | if (LOCAL_SYMBOL_CHECK (s)) | |
2575 | return; | |
158184ac | 2576 | s->sy_flags.sy_mri_common = 0; |
49309057 ILT |
2577 | } |
2578 | ||
2579 | /* Return whether a symbol is an MRI common symbol. */ | |
2580 | ||
2581 | int | |
74937d39 | 2582 | symbol_mri_common_p (symbolS *s) |
49309057 ILT |
2583 | { |
2584 | if (LOCAL_SYMBOL_CHECK (s)) | |
2585 | return 0; | |
158184ac | 2586 | return s->sy_flags.sy_mri_common; |
49309057 ILT |
2587 | } |
2588 | ||
2589 | /* Mark a symbol as having been written. */ | |
2590 | ||
2591 | void | |
74937d39 | 2592 | symbol_mark_written (symbolS *s) |
49309057 ILT |
2593 | { |
2594 | if (LOCAL_SYMBOL_CHECK (s)) | |
2595 | return; | |
158184ac | 2596 | s->sy_flags.sy_written = 1; |
49309057 ILT |
2597 | } |
2598 | ||
2599 | /* Clear the mark of whether a symbol has been written. */ | |
2600 | ||
2601 | void | |
74937d39 | 2602 | symbol_clear_written (symbolS *s) |
49309057 ILT |
2603 | { |
2604 | if (LOCAL_SYMBOL_CHECK (s)) | |
2605 | return; | |
158184ac | 2606 | s->sy_flags.sy_written = 0; |
49309057 ILT |
2607 | } |
2608 | ||
2609 | /* Return whether a symbol has been written. */ | |
2610 | ||
2611 | int | |
74937d39 | 2612 | symbol_written_p (symbolS *s) |
49309057 ILT |
2613 | { |
2614 | if (LOCAL_SYMBOL_CHECK (s)) | |
2615 | return 0; | |
158184ac | 2616 | return s->sy_flags.sy_written; |
49309057 ILT |
2617 | } |
2618 | ||
2619 | /* Mark a symbol has having been resolved. */ | |
2620 | ||
2621 | void | |
74937d39 | 2622 | symbol_mark_resolved (symbolS *s) |
49309057 ILT |
2623 | { |
2624 | if (LOCAL_SYMBOL_CHECK (s)) | |
2625 | { | |
2626 | local_symbol_mark_resolved ((struct local_symbol *) s); | |
2627 | return; | |
2628 | } | |
158184ac | 2629 | s->sy_flags.sy_resolved = 1; |
49309057 ILT |
2630 | } |
2631 | ||
2632 | /* Return whether a symbol has been resolved. */ | |
2633 | ||
2634 | int | |
74937d39 | 2635 | symbol_resolved_p (symbolS *s) |
49309057 ILT |
2636 | { |
2637 | if (LOCAL_SYMBOL_CHECK (s)) | |
2638 | return local_symbol_resolved_p ((struct local_symbol *) s); | |
158184ac | 2639 | return s->sy_flags.sy_resolved; |
49309057 ILT |
2640 | } |
2641 | ||
2642 | /* Return whether a symbol is a section symbol. */ | |
2643 | ||
2644 | int | |
74937d39 | 2645 | symbol_section_p (symbolS *s ATTRIBUTE_UNUSED) |
49309057 ILT |
2646 | { |
2647 | if (LOCAL_SYMBOL_CHECK (s)) | |
2648 | return 0; | |
49309057 | 2649 | return (s->bsym->flags & BSF_SECTION_SYM) != 0; |
49309057 ILT |
2650 | } |
2651 | ||
2652 | /* Return whether a symbol is equated to another symbol. */ | |
2653 | ||
2654 | int | |
74937d39 | 2655 | symbol_equated_p (symbolS *s) |
49309057 ILT |
2656 | { |
2657 | if (LOCAL_SYMBOL_CHECK (s)) | |
2658 | return 0; | |
2659 | return s->sy_value.X_op == O_symbol; | |
2660 | } | |
2661 | ||
e0890092 AM |
2662 | /* Return whether a symbol is equated to another symbol, and should be |
2663 | treated specially when writing out relocs. */ | |
2664 | ||
2665 | int | |
74937d39 | 2666 | symbol_equated_reloc_p (symbolS *s) |
e0890092 AM |
2667 | { |
2668 | if (LOCAL_SYMBOL_CHECK (s)) | |
2669 | return 0; | |
2670 | /* X_op_symbol, normally not used for O_symbol, is set by | |
2671 | resolve_symbol_value to flag expression syms that have been | |
2672 | equated. */ | |
2673 | return (s->sy_value.X_op == O_symbol | |
7be1c489 | 2674 | #if defined (OBJ_COFF) && defined (TE_PE) |
977cdf5a NC |
2675 | && ! S_IS_WEAK (s) |
2676 | #endif | |
158184ac | 2677 | && ((s->sy_flags.sy_resolved && s->sy_value.X_op_symbol != NULL) |
e0890092 AM |
2678 | || ! S_IS_DEFINED (s) |
2679 | || S_IS_COMMON (s))); | |
2680 | } | |
2681 | ||
49309057 ILT |
2682 | /* Return whether a symbol has a constant value. */ |
2683 | ||
2684 | int | |
74937d39 | 2685 | symbol_constant_p (symbolS *s) |
49309057 ILT |
2686 | { |
2687 | if (LOCAL_SYMBOL_CHECK (s)) | |
2688 | return 1; | |
2689 | return s->sy_value.X_op == O_constant; | |
2690 | } | |
2691 | ||
bdf128d6 JB |
2692 | /* Return whether a symbol was cloned and thus removed from the global |
2693 | symbol list. */ | |
2694 | ||
2695 | int | |
2696 | symbol_shadow_p (symbolS *s) | |
2697 | { | |
2698 | if (LOCAL_SYMBOL_CHECK (s)) | |
2699 | return 0; | |
2700 | return s->sy_next == s; | |
2701 | } | |
2702 | ||
49309057 ILT |
2703 | /* Return the BFD symbol for a symbol. */ |
2704 | ||
2705 | asymbol * | |
74937d39 | 2706 | symbol_get_bfdsym (symbolS *s) |
49309057 ILT |
2707 | { |
2708 | if (LOCAL_SYMBOL_CHECK (s)) | |
2709 | s = local_symbol_convert ((struct local_symbol *) s); | |
2710 | return s->bsym; | |
2711 | } | |
2712 | ||
2713 | /* Set the BFD symbol for a symbol. */ | |
2714 | ||
2715 | void | |
74937d39 | 2716 | symbol_set_bfdsym (symbolS *s, asymbol *bsym) |
49309057 ILT |
2717 | { |
2718 | if (LOCAL_SYMBOL_CHECK (s)) | |
2719 | s = local_symbol_convert ((struct local_symbol *) s); | |
22fe14ad NC |
2720 | /* Usually, it is harmless to reset a symbol to a BFD section |
2721 | symbol. For example, obj_elf_change_section sets the BFD symbol | |
2722 | of an old symbol with the newly created section symbol. But when | |
2723 | we have multiple sections with the same name, the newly created | |
2724 | section may have the same name as an old section. We check if the | |
2725 | old symbol has been already marked as a section symbol before | |
2726 | resetting it. */ | |
2727 | if ((s->bsym->flags & BSF_SECTION_SYM) == 0) | |
2728 | s->bsym = bsym; | |
2729 | /* else XXX - What do we do now ? */ | |
49309057 ILT |
2730 | } |
2731 | ||
49309057 ILT |
2732 | #ifdef OBJ_SYMFIELD_TYPE |
2733 | ||
2734 | /* Get a pointer to the object format information for a symbol. */ | |
2735 | ||
2736 | OBJ_SYMFIELD_TYPE * | |
74937d39 | 2737 | symbol_get_obj (symbolS *s) |
49309057 ILT |
2738 | { |
2739 | if (LOCAL_SYMBOL_CHECK (s)) | |
2740 | s = local_symbol_convert ((struct local_symbol *) s); | |
2741 | return &s->sy_obj; | |
2742 | } | |
2743 | ||
2744 | /* Set the object format information for a symbol. */ | |
2745 | ||
2746 | void | |
74937d39 | 2747 | symbol_set_obj (symbolS *s, OBJ_SYMFIELD_TYPE *o) |
49309057 ILT |
2748 | { |
2749 | if (LOCAL_SYMBOL_CHECK (s)) | |
2750 | s = local_symbol_convert ((struct local_symbol *) s); | |
2751 | s->sy_obj = *o; | |
2752 | } | |
2753 | ||
2754 | #endif /* OBJ_SYMFIELD_TYPE */ | |
2755 | ||
2756 | #ifdef TC_SYMFIELD_TYPE | |
2757 | ||
2758 | /* Get a pointer to the processor information for a symbol. */ | |
2759 | ||
2760 | TC_SYMFIELD_TYPE * | |
74937d39 | 2761 | symbol_get_tc (symbolS *s) |
49309057 ILT |
2762 | { |
2763 | if (LOCAL_SYMBOL_CHECK (s)) | |
2764 | s = local_symbol_convert ((struct local_symbol *) s); | |
2765 | return &s->sy_tc; | |
2766 | } | |
2767 | ||
2768 | /* Set the processor information for a symbol. */ | |
2769 | ||
2770 | void | |
74937d39 | 2771 | symbol_set_tc (symbolS *s, TC_SYMFIELD_TYPE *o) |
49309057 ILT |
2772 | { |
2773 | if (LOCAL_SYMBOL_CHECK (s)) | |
2774 | s = local_symbol_convert ((struct local_symbol *) s); | |
2775 | s->sy_tc = *o; | |
2776 | } | |
2777 | ||
2778 | #endif /* TC_SYMFIELD_TYPE */ | |
2779 | ||
252b5132 | 2780 | void |
74937d39 | 2781 | symbol_begin (void) |
252b5132 RH |
2782 | { |
2783 | symbol_lastP = NULL; | |
7c743825 | 2784 | symbol_rootP = NULL; /* In case we have 0 symbols (!!) */ |
252b5132 | 2785 | sy_hash = hash_new (); |
49309057 | 2786 | local_hash = hash_new (); |
252b5132 RH |
2787 | |
2788 | memset ((char *) (&abs_symbol), '\0', sizeof (abs_symbol)); | |
252b5132 | 2789 | #if defined (EMIT_SECTION_SYMBOLS) || !defined (RELOC_REQUIRES_SYMBOL) |
45dfa85a | 2790 | abs_symbol.bsym = bfd_abs_section_ptr->symbol; |
252b5132 RH |
2791 | #endif |
2792 | abs_symbol.sy_value.X_op = O_constant; | |
2793 | abs_symbol.sy_frag = &zero_address_frag; | |
2794 | ||
2795 | if (LOCAL_LABELS_FB) | |
2796 | fb_label_init (); | |
2797 | } | |
4a826962 MR |
2798 | |
2799 | void | |
2800 | dot_symbol_init (void) | |
2801 | { | |
2802 | dot_symbol.bsym = bfd_make_empty_symbol (stdoutput); | |
2803 | if (dot_symbol.bsym == NULL) | |
2804 | as_fatal ("bfd_make_empty_symbol: %s", bfd_errmsg (bfd_get_error ())); | |
2805 | dot_symbol.bsym->name = "."; | |
158184ac | 2806 | dot_symbol.sy_flags.sy_forward_ref = 1; |
4a826962 MR |
2807 | dot_symbol.sy_value.X_op = O_constant; |
2808 | } | |
252b5132 RH |
2809 | \f |
2810 | int indent_level; | |
2811 | ||
2812 | /* Maximum indent level. | |
2813 | Available for modification inside a gdb session. */ | |
87c245cc | 2814 | static int max_indent_level = 8; |
252b5132 | 2815 | |
252b5132 | 2816 | void |
74937d39 | 2817 | print_symbol_value_1 (FILE *file, symbolS *sym) |
252b5132 RH |
2818 | { |
2819 | const char *name = S_GET_NAME (sym); | |
2820 | if (!name || !name[0]) | |
2821 | name = "(unnamed)"; | |
d2df793a NC |
2822 | fprintf (file, "sym "); |
2823 | fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) sym)); | |
2824 | fprintf (file, " %s", name); | |
49309057 ILT |
2825 | |
2826 | if (LOCAL_SYMBOL_CHECK (sym)) | |
2827 | { | |
2828 | struct local_symbol *locsym = (struct local_symbol *) sym; | |
d2df793a NC |
2829 | |
2830 | if (local_symbol_get_frag (locsym) != & zero_address_frag | |
49309057 | 2831 | && local_symbol_get_frag (locsym) != NULL) |
d2df793a NC |
2832 | { |
2833 | fprintf (file, " frag "); | |
2834 | fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) local_symbol_get_frag (locsym))); | |
2835 | } | |
49309057 ILT |
2836 | if (local_symbol_resolved_p (locsym)) |
2837 | fprintf (file, " resolved"); | |
2838 | fprintf (file, " local"); | |
2839 | } | |
2840 | else | |
2841 | { | |
2842 | if (sym->sy_frag != &zero_address_frag) | |
d2df793a NC |
2843 | { |
2844 | fprintf (file, " frag "); | |
2845 | fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) sym->sy_frag)); | |
2846 | } | |
158184ac | 2847 | if (sym->sy_flags.sy_written) |
49309057 | 2848 | fprintf (file, " written"); |
158184ac | 2849 | if (sym->sy_flags.sy_resolved) |
49309057 | 2850 | fprintf (file, " resolved"); |
158184ac | 2851 | else if (sym->sy_flags.sy_resolving) |
49309057 | 2852 | fprintf (file, " resolving"); |
158184ac | 2853 | if (sym->sy_flags.sy_used_in_reloc) |
49309057 | 2854 | fprintf (file, " used-in-reloc"); |
158184ac | 2855 | if (sym->sy_flags.sy_used) |
49309057 ILT |
2856 | fprintf (file, " used"); |
2857 | if (S_IS_LOCAL (sym)) | |
2858 | fprintf (file, " local"); | |
e97b3f28 | 2859 | if (S_IS_EXTERNAL (sym)) |
49309057 | 2860 | fprintf (file, " extern"); |
06e77878 AO |
2861 | if (S_IS_WEAK (sym)) |
2862 | fprintf (file, " weak"); | |
49309057 ILT |
2863 | if (S_IS_DEBUG (sym)) |
2864 | fprintf (file, " debug"); | |
2865 | if (S_IS_DEFINED (sym)) | |
2866 | fprintf (file, " defined"); | |
2867 | } | |
06e77878 AO |
2868 | if (S_IS_WEAKREFR (sym)) |
2869 | fprintf (file, " weakrefr"); | |
2870 | if (S_IS_WEAKREFD (sym)) | |
2871 | fprintf (file, " weakrefd"); | |
252b5132 | 2872 | fprintf (file, " %s", segment_name (S_GET_SEGMENT (sym))); |
49309057 | 2873 | if (symbol_resolved_p (sym)) |
252b5132 RH |
2874 | { |
2875 | segT s = S_GET_SEGMENT (sym); | |
2876 | ||
2877 | if (s != undefined_section | |
411863a4 | 2878 | && s != expr_section) |
0af1713e | 2879 | fprintf (file, " %lx", (unsigned long) S_GET_VALUE (sym)); |
252b5132 RH |
2880 | } |
2881 | else if (indent_level < max_indent_level | |
2882 | && S_GET_SEGMENT (sym) != undefined_section) | |
2883 | { | |
2884 | indent_level++; | |
2885 | fprintf (file, "\n%*s<", indent_level * 4, ""); | |
49309057 ILT |
2886 | if (LOCAL_SYMBOL_CHECK (sym)) |
2887 | fprintf (file, "constant %lx", | |
0af1713e | 2888 | (unsigned long) ((struct local_symbol *) sym)->lsy_value); |
49309057 ILT |
2889 | else |
2890 | print_expr_1 (file, &sym->sy_value); | |
252b5132 RH |
2891 | fprintf (file, ">"); |
2892 | indent_level--; | |
2893 | } | |
2894 | fflush (file); | |
2895 | } | |
2896 | ||
2897 | void | |
74937d39 | 2898 | print_symbol_value (symbolS *sym) |
252b5132 RH |
2899 | { |
2900 | indent_level = 0; | |
2901 | print_symbol_value_1 (stderr, sym); | |
2902 | fprintf (stderr, "\n"); | |
2903 | } | |
2904 | ||
2905 | static void | |
74937d39 | 2906 | print_binary (FILE *file, const char *name, expressionS *exp) |
252b5132 RH |
2907 | { |
2908 | indent_level++; | |
2909 | fprintf (file, "%s\n%*s<", name, indent_level * 4, ""); | |
2910 | print_symbol_value_1 (file, exp->X_add_symbol); | |
2911 | fprintf (file, ">\n%*s<", indent_level * 4, ""); | |
2912 | print_symbol_value_1 (file, exp->X_op_symbol); | |
2913 | fprintf (file, ">"); | |
2914 | indent_level--; | |
2915 | } | |
2916 | ||
2917 | void | |
74937d39 | 2918 | print_expr_1 (FILE *file, expressionS *exp) |
252b5132 | 2919 | { |
d2df793a NC |
2920 | fprintf (file, "expr "); |
2921 | fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) exp)); | |
2922 | fprintf (file, " "); | |
252b5132 RH |
2923 | switch (exp->X_op) |
2924 | { | |
2925 | case O_illegal: | |
2926 | fprintf (file, "illegal"); | |
2927 | break; | |
2928 | case O_absent: | |
2929 | fprintf (file, "absent"); | |
2930 | break; | |
2931 | case O_constant: | |
0af1713e | 2932 | fprintf (file, "constant %lx", (unsigned long) exp->X_add_number); |
252b5132 RH |
2933 | break; |
2934 | case O_symbol: | |
2935 | indent_level++; | |
2936 | fprintf (file, "symbol\n%*s<", indent_level * 4, ""); | |
2937 | print_symbol_value_1 (file, exp->X_add_symbol); | |
2938 | fprintf (file, ">"); | |
2939 | maybe_print_addnum: | |
2940 | if (exp->X_add_number) | |
2941 | fprintf (file, "\n%*s%lx", indent_level * 4, "", | |
0af1713e | 2942 | (unsigned long) exp->X_add_number); |
252b5132 RH |
2943 | indent_level--; |
2944 | break; | |
2945 | case O_register: | |
2946 | fprintf (file, "register #%d", (int) exp->X_add_number); | |
2947 | break; | |
2948 | case O_big: | |
2949 | fprintf (file, "big"); | |
2950 | break; | |
2951 | case O_uminus: | |
2952 | fprintf (file, "uminus -<"); | |
2953 | indent_level++; | |
2954 | print_symbol_value_1 (file, exp->X_add_symbol); | |
2955 | fprintf (file, ">"); | |
2956 | goto maybe_print_addnum; | |
2957 | case O_bit_not: | |
2958 | fprintf (file, "bit_not"); | |
2959 | break; | |
2960 | case O_multiply: | |
2961 | print_binary (file, "multiply", exp); | |
2962 | break; | |
2963 | case O_divide: | |
2964 | print_binary (file, "divide", exp); | |
2965 | break; | |
2966 | case O_modulus: | |
2967 | print_binary (file, "modulus", exp); | |
2968 | break; | |
2969 | case O_left_shift: | |
2970 | print_binary (file, "lshift", exp); | |
2971 | break; | |
2972 | case O_right_shift: | |
2973 | print_binary (file, "rshift", exp); | |
2974 | break; | |
2975 | case O_bit_inclusive_or: | |
2976 | print_binary (file, "bit_ior", exp); | |
2977 | break; | |
2978 | case O_bit_exclusive_or: | |
2979 | print_binary (file, "bit_xor", exp); | |
2980 | break; | |
2981 | case O_bit_and: | |
2982 | print_binary (file, "bit_and", exp); | |
2983 | break; | |
2984 | case O_eq: | |
2985 | print_binary (file, "eq", exp); | |
2986 | break; | |
2987 | case O_ne: | |
2988 | print_binary (file, "ne", exp); | |
2989 | break; | |
2990 | case O_lt: | |
2991 | print_binary (file, "lt", exp); | |
2992 | break; | |
2993 | case O_le: | |
2994 | print_binary (file, "le", exp); | |
2995 | break; | |
2996 | case O_ge: | |
2997 | print_binary (file, "ge", exp); | |
2998 | break; | |
2999 | case O_gt: | |
3000 | print_binary (file, "gt", exp); | |
3001 | break; | |
3002 | case O_logical_and: | |
3003 | print_binary (file, "logical_and", exp); | |
3004 | break; | |
3005 | case O_logical_or: | |
3006 | print_binary (file, "logical_or", exp); | |
3007 | break; | |
3008 | case O_add: | |
3009 | indent_level++; | |
3010 | fprintf (file, "add\n%*s<", indent_level * 4, ""); | |
3011 | print_symbol_value_1 (file, exp->X_add_symbol); | |
3012 | fprintf (file, ">\n%*s<", indent_level * 4, ""); | |
3013 | print_symbol_value_1 (file, exp->X_op_symbol); | |
3014 | fprintf (file, ">"); | |
3015 | goto maybe_print_addnum; | |
3016 | case O_subtract: | |
3017 | indent_level++; | |
3018 | fprintf (file, "subtract\n%*s<", indent_level * 4, ""); | |
3019 | print_symbol_value_1 (file, exp->X_add_symbol); | |
3020 | fprintf (file, ">\n%*s<", indent_level * 4, ""); | |
3021 | print_symbol_value_1 (file, exp->X_op_symbol); | |
3022 | fprintf (file, ">"); | |
3023 | goto maybe_print_addnum; | |
3024 | default: | |
3025 | fprintf (file, "{unknown opcode %d}", (int) exp->X_op); | |
3026 | break; | |
3027 | } | |
3028 | fflush (stdout); | |
3029 | } | |
3030 | ||
3031 | void | |
74937d39 | 3032 | print_expr (expressionS *exp) |
252b5132 RH |
3033 | { |
3034 | print_expr_1 (stderr, exp); | |
3035 | fprintf (stderr, "\n"); | |
3036 | } | |
3037 | ||
3038 | void | |
74937d39 | 3039 | symbol_print_statistics (FILE *file) |
252b5132 RH |
3040 | { |
3041 | hash_print_statistics (file, "symbol table", sy_hash); | |
49309057 ILT |
3042 | hash_print_statistics (file, "mini local symbol table", local_hash); |
3043 | fprintf (file, "%lu mini local symbols created, %lu converted\n", | |
3044 | local_symbol_count, local_symbol_conversion_count); | |
252b5132 | 3045 | } |
280d71bf DB |
3046 | |
3047 | #ifdef OBJ_COMPLEX_RELC | |
3048 | ||
3049 | /* Convert given symbol to a new complex-relocation symbol name. This | |
6f12865c | 3050 | may be a recursive function, since it might be called for non-leaf |
280d71bf | 3051 | nodes (plain symbols) in the expression tree. The caller owns the |
6f12865c AM |
3052 | returning string, so should free it eventually. Errors are |
3053 | indicated via as_bad and a NULL return value. The given symbol | |
280d71bf DB |
3054 | is marked with sy_used_in_reloc. */ |
3055 | ||
3056 | char * | |
3057 | symbol_relc_make_sym (symbolS * sym) | |
3058 | { | |
3059 | char * terminal = NULL; | |
3060 | const char * sname; | |
3061 | char typetag; | |
3062 | int sname_len; | |
3063 | ||
9c2799c2 | 3064 | gas_assert (sym != NULL); |
280d71bf DB |
3065 | |
3066 | /* Recurse to symbol_relc_make_expr if this symbol | |
3067 | is defined as an expression or a plain value. */ | |
3068 | if ( S_GET_SEGMENT (sym) == expr_section | |
3069 | || S_GET_SEGMENT (sym) == absolute_section) | |
3070 | return symbol_relc_make_expr (& sym->sy_value); | |
3071 | ||
3072 | /* This may be a "fake symbol" L0\001, referring to ".". | |
3073 | Write out a special null symbol to refer to this position. */ | |
3074 | if (! strcmp (S_GET_NAME (sym), FAKE_LABEL_NAME)) | |
3075 | return xstrdup ("."); | |
3076 | ||
3077 | /* We hope this is a plain leaf symbol. Construct the encoding | |
3078 | as {S,s}II...:CCCCCCC.... | |
3079 | where 'S'/'s' means section symbol / plain symbol | |
3080 | III is decimal for the symbol name length | |
3081 | CCC is the symbol name itself. */ | |
3082 | symbol_mark_used_in_reloc (sym); | |
3083 | ||
3084 | sname = S_GET_NAME (sym); | |
3085 | sname_len = strlen (sname); | |
3086 | typetag = symbol_section_p (sym) ? 'S' : 's'; | |
3087 | ||
add39d23 TS |
3088 | terminal = XNEWVEC (char, (1 /* S or s */ |
3089 | + 8 /* sname_len in decimal */ | |
3090 | + 1 /* _ spacer */ | |
3091 | + sname_len /* name itself */ | |
3092 | + 1 /* \0 */ )); | |
280d71bf DB |
3093 | |
3094 | sprintf (terminal, "%c%d:%s", typetag, sname_len, sname); | |
3095 | return terminal; | |
3096 | } | |
3097 | ||
3098 | /* Convert given value to a new complex-relocation symbol name. This | |
3099 | is a non-recursive function, since it is be called for leaf nodes | |
3100 | (plain values) in the expression tree. The caller owns the | |
3101 | returning string, so should free() it eventually. No errors. */ | |
3102 | ||
3103 | char * | |
3104 | symbol_relc_make_value (offsetT val) | |
3105 | { | |
325801bd | 3106 | char * terminal = XNEWVEC (char, 28); /* Enough for long long. */ |
280d71bf DB |
3107 | |
3108 | terminal[0] = '#'; | |
1a412f5f | 3109 | bfd_sprintf_vma (stdoutput, terminal + 1, val); |
280d71bf DB |
3110 | return terminal; |
3111 | } | |
3112 | ||
3113 | /* Convert given expression to a new complex-relocation symbol name. | |
3114 | This is a recursive function, since it traverses the entire given | |
3115 | expression tree. The caller owns the returning string, so should | |
3116 | free() it eventually. Errors are indicated via as_bad() and a NULL | |
3117 | return value. */ | |
3118 | ||
3119 | char * | |
3120 | symbol_relc_make_expr (expressionS * exp) | |
3121 | { | |
b9bb4a93 | 3122 | const char * opstr = NULL; /* Operator prefix string. */ |
280d71bf DB |
3123 | int arity = 0; /* Arity of this operator. */ |
3124 | char * operands[3]; /* Up to three operands. */ | |
3125 | char * concat_string = NULL; | |
3126 | ||
3127 | operands[0] = operands[1] = operands[2] = NULL; | |
3128 | ||
9c2799c2 | 3129 | gas_assert (exp != NULL); |
280d71bf DB |
3130 | |
3131 | /* Match known operators -> fill in opstr, arity, operands[] and fall | |
34bca508 | 3132 | through to construct subexpression fragments; may instead return |
280d71bf DB |
3133 | string directly for leaf nodes. */ |
3134 | ||
34bca508 | 3135 | /* See expr.h for the meaning of all these enums. Many operators |
280d71bf DB |
3136 | have an unnatural arity (X_add_number implicitly added). The |
3137 | conversion logic expands them to explicit "+" subexpressions. */ | |
3138 | ||
3139 | switch (exp->X_op) | |
3140 | { | |
3141 | default: | |
3142 | as_bad ("Unknown expression operator (enum %d)", exp->X_op); | |
3143 | break; | |
3144 | ||
3145 | /* Leaf nodes. */ | |
3146 | case O_constant: | |
3147 | return symbol_relc_make_value (exp->X_add_number); | |
3148 | ||
3149 | case O_symbol: | |
34bca508 L |
3150 | if (exp->X_add_number) |
3151 | { | |
3152 | arity = 2; | |
3153 | opstr = "+"; | |
280d71bf DB |
3154 | operands[0] = symbol_relc_make_sym (exp->X_add_symbol); |
3155 | operands[1] = symbol_relc_make_value (exp->X_add_number); | |
3156 | break; | |
3157 | } | |
3158 | else | |
3159 | return symbol_relc_make_sym (exp->X_add_symbol); | |
3160 | ||
3161 | /* Helper macros for nesting nodes. */ | |
3162 | ||
3163 | #define HANDLE_XADD_OPT1(str_) \ | |
3164 | if (exp->X_add_number) \ | |
3165 | { \ | |
3166 | arity = 2; \ | |
3167 | opstr = "+:" str_; \ | |
3168 | operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \ | |
3169 | operands[1] = symbol_relc_make_value (exp->X_add_number); \ | |
3170 | break; \ | |
3171 | } \ | |
3172 | else \ | |
3173 | { \ | |
3174 | arity = 1; \ | |
3175 | opstr = str_; \ | |
3176 | operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \ | |
3177 | } \ | |
3178 | break | |
34bca508 | 3179 | |
280d71bf DB |
3180 | #define HANDLE_XADD_OPT2(str_) \ |
3181 | if (exp->X_add_number) \ | |
3182 | { \ | |
3183 | arity = 3; \ | |
3184 | opstr = "+:" str_; \ | |
3185 | operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \ | |
3186 | operands[1] = symbol_relc_make_sym (exp->X_op_symbol); \ | |
3187 | operands[2] = symbol_relc_make_value (exp->X_add_number); \ | |
3188 | } \ | |
3189 | else \ | |
3190 | { \ | |
3191 | arity = 2; \ | |
3192 | opstr = str_; \ | |
3193 | operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \ | |
3194 | operands[1] = symbol_relc_make_sym (exp->X_op_symbol); \ | |
3195 | } \ | |
3196 | break | |
3197 | ||
3198 | /* Nesting nodes. */ | |
3199 | ||
3200 | case O_uminus: HANDLE_XADD_OPT1 ("0-"); | |
3201 | case O_bit_not: HANDLE_XADD_OPT1 ("~"); | |
3202 | case O_logical_not: HANDLE_XADD_OPT1 ("!"); | |
3203 | case O_multiply: HANDLE_XADD_OPT2 ("*"); | |
3204 | case O_divide: HANDLE_XADD_OPT2 ("/"); | |
3205 | case O_modulus: HANDLE_XADD_OPT2 ("%"); | |
3206 | case O_left_shift: HANDLE_XADD_OPT2 ("<<"); | |
3207 | case O_right_shift: HANDLE_XADD_OPT2 (">>"); | |
3208 | case O_bit_inclusive_or: HANDLE_XADD_OPT2 ("|"); | |
3209 | case O_bit_exclusive_or: HANDLE_XADD_OPT2 ("^"); | |
3210 | case O_bit_and: HANDLE_XADD_OPT2 ("&"); | |
3211 | case O_add: HANDLE_XADD_OPT2 ("+"); | |
3212 | case O_subtract: HANDLE_XADD_OPT2 ("-"); | |
3213 | case O_eq: HANDLE_XADD_OPT2 ("=="); | |
3214 | case O_ne: HANDLE_XADD_OPT2 ("!="); | |
3215 | case O_lt: HANDLE_XADD_OPT2 ("<"); | |
3216 | case O_le: HANDLE_XADD_OPT2 ("<="); | |
3217 | case O_ge: HANDLE_XADD_OPT2 (">="); | |
3218 | case O_gt: HANDLE_XADD_OPT2 (">"); | |
3219 | case O_logical_and: HANDLE_XADD_OPT2 ("&&"); | |
3220 | case O_logical_or: HANDLE_XADD_OPT2 ("||"); | |
3221 | } | |
3222 | ||
3223 | /* Validate & reject early. */ | |
3224 | if (arity >= 1 && ((operands[0] == NULL) || (strlen (operands[0]) == 0))) | |
3225 | opstr = NULL; | |
3226 | if (arity >= 2 && ((operands[1] == NULL) || (strlen (operands[1]) == 0))) | |
3227 | opstr = NULL; | |
3228 | if (arity >= 3 && ((operands[2] == NULL) || (strlen (operands[2]) == 0))) | |
3229 | opstr = NULL; | |
3230 | ||
3231 | if (opstr == NULL) | |
3232 | concat_string = NULL; | |
29a2809e TS |
3233 | else if (arity == 0) |
3234 | concat_string = xstrdup (opstr); | |
3235 | else if (arity == 1) | |
3236 | concat_string = concat (opstr, ":", operands[0], (char *) NULL); | |
3237 | else if (arity == 2) | |
3238 | concat_string = concat (opstr, ":", operands[0], ":", operands[1], | |
3239 | (char *) NULL); | |
280d71bf | 3240 | else |
29a2809e TS |
3241 | concat_string = concat (opstr, ":", operands[0], ":", operands[1], ":", |
3242 | operands[2], (char *) NULL); | |
280d71bf DB |
3243 | |
3244 | /* Free operand strings (not opstr). */ | |
3245 | if (arity >= 1) xfree (operands[0]); | |
3246 | if (arity >= 2) xfree (operands[1]); | |
3247 | if (arity >= 3) xfree (operands[2]); | |
3248 | ||
3249 | return concat_string; | |
3250 | } | |
3251 | ||
3252 | #endif |