projects / deliverable / binutils-gdb.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
gas/
[deliverable/binutils-gdb.git] / gas / symbols.c
CommitLineData
252b5132 1/* symbols.c -symbol table-
f7e42eb4 2 Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
db557034 3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
252b5132
RH		 4 Free Software Foundation, Inc.
5
6 This file is part of GAS, the GNU Assembler.
7
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
ec2655a6 10 the Free Software Foundation; either version 3, or (at your option)
252b5132
RH		 11 any later version.
12
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
4b4da160
NC		 20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
252b5132 22
7c743825 23/* #define DEBUG_SYMS / * to debug symbol list maintenance. */
252b5132 24
252b5132
RH		 25#include "as.h"
26
3882b010 27#include "safe-ctype.h"
252b5132
RH		 28#include "obstack.h" /* For "symbols.h" */
29#include "subsegs.h"
30
49309057
ILT		 31#include "struc-symbol.h"
32
252b5132
RH		 33/* This is non-zero if symbols are case sensitive, which is the
34 default. */
35int symbols_case_sensitive = 1;
36
37#ifndef WORKING_DOT_WORD
38extern int new_broken_words;
39#endif
40
41/* symbol-name => struct symbol pointer */
42static struct hash_control *sy_hash;
43
49309057
ILT		 44/* Table of local symbols. */
45static struct hash_control *local_hash;
46
7c743825 47/* Below are commented in "symbols.h". */
252b5132
RH		 48symbolS *symbol_rootP;
49symbolS *symbol_lastP;
50symbolS abs_symbol;
51
52#ifdef DEBUG_SYMS
53#define debug_verify_symchain verify_symbol_chain
54#else
55#define debug_verify_symchain(root, last) ((void) 0)
56#endif
57
aa257fcd
NC		 58#define DOLLAR_LABEL_CHAR '\001'
59#define LOCAL_LABEL_CHAR '\002'
60
252b5132 61struct obstack notes;
977cdf5a
NC		 62#ifdef USE_UNIQUE
63/* The name of an external symbol which is
64 used to make weak PE symbol names unique. */
65const char * an_external_name;
66#endif
252b5132 67
74937d39
KH		 68static char *save_symbol_name (const char *);
69static void fb_label_init (void);
70static long dollar_label_instance (long);
71static long fb_label_instance (long);
252b5132 72
74937d39
KH		 73static void print_binary (FILE *, const char *, expressionS *);
74static void report_op_error (symbolS *, symbolS *, symbolS *);
252b5132 75
7c743825 76/* Return a pointer to a new symbol. Die if we can't make a new
252b5132
RH		 77 symbol. Fill in the symbol's values. Add symbol to end of symbol
78 chain.
7c743825 79
252b5132
RH		 80 This function should be called in the general case of creating a
81 symbol. However, if the output file symbol table has already been
82 set, and you are certain that this symbol won't be wanted in the
83 output file, you can call symbol_create. */
84
85symbolS *
74937d39 86symbol_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
104static char *
74937d39 105save_symbol_name (const char *name)
252b5132
RH		 106{
107 unsigned int name_length;
49309057 108 char *ret;
252b5132 109
7c743825 110 name_length = strlen (name) + 1; /* +1 for \0. */
252b5132 111 obstack_grow (&notes, name, name_length);
49309057
ILT		 112 ret = obstack_finish (&notes);
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
129symbolS *
74937d39
KH		 130symbol_create (const char *name, /* It is copied, the caller can destroy/modify. */
131 segT segment, /* Segment identifier (SEG_<something>). */
132 valueT valu, /* Symbol value. */
133 fragS *frag /* Associated fragment. */)
49309057
ILT		 134{
135 char *preserved_copy_of_name;
136 symbolS *symbolP;
137
138 preserved_copy_of_name = save_symbol_name (name);
139
252b5132
RH		 140 symbolP = (symbolS *) obstack_alloc (&notes, sizeof (symbolS));
141
7c743825 142 /* symbol must be born in some fixed state. This seems as good as any. */
252b5132
RH		 143 memset (symbolP, 0, sizeof (symbolS));
144
252b5132
RH		 145 symbolP->bsym = bfd_make_empty_symbol (stdoutput);
146 if (symbolP->bsym == NULL)
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 169static symbolS *local_symbol_convert (struct local_symbol *);
49309057
ILT		 170
171/* Used for statistics. */
172
173static unsigned long local_symbol_count;
174static 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) \
181 (s->bsym == NULL \
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
87c245cc 190static struct local_symbol *
74937d39 191local_symbol_make (const char *name, segT section, valueT value, fragS *frag)
49309057
ILT		 192{
193 char *name_copy;
194 struct local_symbol *ret;
195
196 ++local_symbol_count;
197
198 name_copy = save_symbol_name (name);
199
200 ret = (struct local_symbol *) obstack_alloc (&notes, sizeof *ret);
201 ret->lsy_marker = NULL;
202 ret->lsy_name = name_copy;
203 ret->lsy_section = section;
204 local_symbol_set_frag (ret, frag);
bd780143 205 ret->lsy_value = value;
49309057
ILT		 206
207 hash_jam (local_hash, name_copy, (PTR) ret);
208
209 return ret;
210}
211
212/* Convert a local symbol into a real symbol. Note that we do not
213 reclaim the space used by the local symbol. */
214
215static symbolS *
74937d39 216local_symbol_convert (struct local_symbol *locsym)
49309057
ILT		 217{
218 symbolS *ret;
219
220 assert (locsym->lsy_marker == NULL);
221 if (local_symbol_converted_p (locsym))
222 return local_symbol_get_real_symbol (locsym);
223
224 ++local_symbol_conversion_count;
225
bd780143 226 ret = symbol_new (locsym->lsy_name, locsym->lsy_section, locsym->lsy_value,
49309057
ILT		 227 local_symbol_get_frag (locsym));
228
229 if (local_symbol_resolved_p (locsym))
230 ret->sy_resolved = 1;
231
232 /* Local symbols are always either defined or used. */
233 ret->sy_used = 1;
234
8c5e1ccd
AO		 235#ifdef TC_LOCAL_SYMFIELD_CONVERT
236 TC_LOCAL_SYMFIELD_CONVERT (locsym, ret);
237#endif
238
49309057
ILT		 239 symbol_table_insert (ret);
240
241 local_symbol_mark_converted (locsym);
242 local_symbol_set_real_symbol (locsym, ret);
243
244 hash_jam (local_hash, locsym->lsy_name, NULL);
245
246 return ret;
247}
49309057 248\f
7c743825
KH		 249/* We have just seen "<name>:".
250 Creates a struct symbol unless it already exists.
251
252 Gripes if we are redefining a symbol incompatibly (and ignores it). */
252b5132 253
252b5132 254symbolS *
74937d39
KH		 255colon (/* Just seen "x:" - rattle symbols & frags. */
256 const char *sym_name /* Symbol name, as a cannonical string. */
257 /* We copy this string: OK to alter later. */)
252b5132 258{
7c743825 259 register symbolS *symbolP; /* Symbol we are working with. */
252b5132 260
7cf10893 261 /* Sun local labels go out of scope whenever a non-local symbol is
252b5132 262 defined. */
7be1c489
AM		 263 if (LOCAL_LABELS_DOLLAR
264 && !bfd_is_local_label_name (stdoutput, sym_name))
265 dollar_label_clear ();
252b5132
RH		 266
267#ifndef WORKING_DOT_WORD
268 if (new_broken_words)
269 {
270 struct broken_word *a;
271 int possible_bytes;
272 fragS *frag_tmp;
273 char *frag_opcode;
274
7cf10893
NC		 275 if (now_seg == absolute_section)
276 {
277 as_bad (_("cannot define symbol `%s' in absolute section"), sym_name);
278 return NULL;
279 }
1d3b2b27 280
252b5132
RH		 281 possible_bytes = (md_short_jump_size
282 + new_broken_words * md_long_jump_size);
283
284 frag_tmp = frag_now;
285 frag_opcode = frag_var (rs_broken_word,
286 possible_bytes,
287 possible_bytes,
288 (relax_substateT) 0,
289 (symbolS *) broken_words,
290 (offsetT) 0,
291 NULL);
292
7c743825
KH		 293 /* We want to store the pointer to where to insert the jump
294 table in the fr_opcode of the rs_broken_word frag. This
295 requires a little hackery. */
252b5132
RH		 296 while (frag_tmp
297 && (frag_tmp->fr_type != rs_broken_word
298 || frag_tmp->fr_opcode))
299 frag_tmp = frag_tmp->fr_next;
300 know (frag_tmp);
301 frag_tmp->fr_opcode = frag_opcode;
302 new_broken_words = 0;
303
304 for (a = broken_words; a && a->dispfrag == 0; a = a->next_broken_word)
305 a->dispfrag = frag_tmp;
306 }
307#endif /* WORKING_DOT_WORD */
308
309 if ((symbolP = symbol_find (sym_name)) != 0)
310 {
06e77878 311 S_CLEAR_WEAKREFR (symbolP);
252b5132
RH		 312#ifdef RESOLVE_SYMBOL_REDEFINITION
313 if (RESOLVE_SYMBOL_REDEFINITION (symbolP))
314 return symbolP;
315#endif
7c743825 316 /* Now check for undefined symbols. */
49309057
ILT		 317 if (LOCAL_SYMBOL_CHECK (symbolP))
318 {
319 struct local_symbol *locsym = (struct local_symbol *) symbolP;
320
321 if (locsym->lsy_section != undefined_section
322 && (local_symbol_get_frag (locsym) != frag_now
323 || locsym->lsy_section != now_seg
bd780143 324 || locsym->lsy_value != frag_now_fix ()))
49309057 325 {
0e389e77 326 as_bad (_("symbol `%s' is already defined"), sym_name);
49309057
ILT		 327 return symbolP;
328 }
329
330 locsym->lsy_section = now_seg;
331 local_symbol_set_frag (locsym, frag_now);
bd780143 332 locsym->lsy_value = frag_now_fix ();
49309057 333 }
b54788f8 334 else if (!(S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
92757bc9
JB		 335 || S_IS_COMMON (symbolP)
336 || S_IS_VOLATILE (symbolP))
252b5132 337 {
89cdfe57 338 if (S_IS_VOLATILE (symbolP))
92757bc9
JB		 339 {
340 symbolP = symbol_clone (symbolP, 1);
341 S_SET_VALUE (symbolP, 0);
342 S_CLEAR_VOLATILE (symbolP);
343 }
252b5132
RH		 344 if (S_GET_VALUE (symbolP) == 0)
345 {
346 symbolP->sy_frag = frag_now;
347#ifdef OBJ_VMS
7c743825 348 S_SET_OTHER (symbolP, const_flag);
252b5132
RH		 349#endif
350 S_SET_VALUE (symbolP, (valueT) frag_now_fix ());
351 S_SET_SEGMENT (symbolP, now_seg);
352#ifdef N_UNDF
353 know (N_UNDF == 0);
7c743825 354#endif /* if we have one, it better be zero. */
252b5132
RH		 355
356 }
357 else
358 {
7c743825
KH		 359 /* There are still several cases to check:
360
361 A .comm/.lcomm symbol being redefined as initialized
362 data is OK
363
364 A .comm/.lcomm symbol being redefined with a larger
365 size is also OK
366
367 This only used to be allowed on VMS gas, but Sun cc
368 on the sparc also depends on it. */
252b5132
RH		 369
370 if (((!S_IS_DEBUG (symbolP)
371 && (!S_IS_DEFINED (symbolP) || S_IS_COMMON (symbolP))
372 && S_IS_EXTERNAL (symbolP))
373 || S_GET_SEGMENT (symbolP) == bss_section)
374 && (now_seg == data_section
b3ce1bf7 375 || now_seg == bss_section
252b5132
RH		 376 || now_seg == S_GET_SEGMENT (symbolP)))
377 {
7c743825 378 /* Select which of the 2 cases this is. */
252b5132
RH		 379 if (now_seg != data_section)
380 {
7c743825
KH		 381 /* New .comm for prev .comm symbol.
382
383 If the new size is larger we just change its
384 value. If the new size is smaller, we ignore
385 this symbol. */
252b5132
RH		 386 if (S_GET_VALUE (symbolP)
387 < ((unsigned) frag_now_fix ()))
388 {
389 S_SET_VALUE (symbolP, (valueT) frag_now_fix ());
390 }
391 }
392 else
393 {
394 /* It is a .comm/.lcomm being converted to initialized
395 data. */
396 symbolP->sy_frag = frag_now;
397#ifdef OBJ_VMS
7c743825 398 S_SET_OTHER (symbolP, const_flag);
252b5132
RH		 399#endif
400 S_SET_VALUE (symbolP, (valueT) frag_now_fix ());
7c743825 401 S_SET_SEGMENT (symbolP, now_seg); /* Keep N_EXT bit. */
252b5132
RH		 402 }
403 }
404 else
405 {
4c63da97
AM		 406#if (!defined (OBJ_AOUT) && !defined (OBJ_MAYBE_AOUT) \
407 && !defined (OBJ_BOUT) && !defined (OBJ_MAYBE_BOUT))
408 static const char *od_buf = "";
252b5132 409#else
4c63da97
AM		 410 char od_buf[100];
411 od_buf[0] = '\0';
4c63da97 412 if (OUTPUT_FLAVOR == bfd_target_aout_flavour)
d1a6c242
KH		 413 sprintf (od_buf, "%d.%d.",
414 S_GET_OTHER (symbolP),
415 S_GET_DESC (symbolP));
4c63da97 416#endif
0e389e77 417 as_bad (_("symbol `%s' is already defined as \"%s\"/%s%ld"),
252b5132
RH		 418 sym_name,
419 segment_name (S_GET_SEGMENT (symbolP)),
4c63da97 420 od_buf,
252b5132 421 (long) S_GET_VALUE (symbolP));
252b5132 422 }
7c743825 423 } /* if the undefined symbol has no value */
252b5132
RH		 424 }
425 else
426 {
7c743825 427 /* Don't blow up if the definition is the same. */
252b5132
RH		 428 if (!(frag_now == symbolP->sy_frag
429 && S_GET_VALUE (symbolP) == frag_now_fix ()
430 && S_GET_SEGMENT (symbolP) == now_seg))
92757bc9
JB		 431 {
432 as_bad (_("symbol `%s' is already defined"), sym_name);
433 symbolP = symbol_clone (symbolP, 0);
434 }
d4887adc 435 }
252b5132
RH		 436
437 }
49309057
ILT		 438 else if (! flag_keep_locals && bfd_is_local_label_name (stdoutput, sym_name))
439 {
440 symbolP = (symbolS *) local_symbol_make (sym_name, now_seg,
441 (valueT) frag_now_fix (),
442 frag_now);
443 }
252b5132
RH		 444 else
445 {
446 symbolP = symbol_new (sym_name, now_seg, (valueT) frag_now_fix (),
447 frag_now);
448#ifdef OBJ_VMS
449 S_SET_OTHER (symbolP, const_flag);
450#endif /* OBJ_VMS */
451
452 symbol_table_insert (symbolP);
d4887adc 453 }
252b5132
RH		 454
455 if (mri_common_symbol != NULL)
456 {
457 /* This symbol is actually being defined within an MRI common
1d3b2b27 458 section. This requires special handling. */
49309057
ILT		 459 if (LOCAL_SYMBOL_CHECK (symbolP))
460 symbolP = local_symbol_convert ((struct local_symbol *) symbolP);
252b5132
RH		 461 symbolP->sy_value.X_op = O_symbol;
462 symbolP->sy_value.X_add_symbol = mri_common_symbol;
463 symbolP->sy_value.X_add_number = S_GET_VALUE (mri_common_symbol);
464 symbolP->sy_frag = &zero_address_frag;
465 S_SET_SEGMENT (symbolP, expr_section);
466 symbolP->sy_mri_common = 1;
467 }
468
469#ifdef tc_frob_label
470 tc_frob_label (symbolP);
471#endif
472#ifdef obj_frob_label
473 obj_frob_label (symbolP);
474#endif
475
476 return symbolP;
477}
478\f
7c743825 479/* Die if we can't insert the symbol. */
252b5132 480
7c743825 481void
74937d39 482symbol_table_insert (symbolS *symbolP)
252b5132
RH		 483{
484 register const char *error_string;
485
486 know (symbolP);
487 know (S_GET_NAME (symbolP));
488
49309057
ILT		 489 if (LOCAL_SYMBOL_CHECK (symbolP))
490 {
491 error_string = hash_jam (local_hash, S_GET_NAME (symbolP),
492 (PTR) symbolP);
493 if (error_string != NULL)
0e389e77 494 as_fatal (_("inserting \"%s\" into symbol table failed: %s"),
49309057
ILT		 495 S_GET_NAME (symbolP), error_string);
496 return;
497 }
498
252b5132
RH		 499 if ((error_string = hash_jam (sy_hash, S_GET_NAME (symbolP), (PTR) symbolP)))
500 {
0e389e77 501 as_fatal (_("inserting \"%s\" into symbol table failed: %s"),
252b5132 502 S_GET_NAME (symbolP), error_string);
7c743825
KH		 503 } /* on error */
504}
252b5132 505\f
7c743825
KH		 506/* If a symbol name does not exist, create it as undefined, and insert
507 it into the symbol table. Return a pointer to it. */
508
252b5132 509symbolS *
74937d39 510symbol_find_or_make (const char *name)
252b5132
RH		 511{
512 register symbolS *symbolP;
513
514 symbolP = symbol_find (name);
515
516 if (symbolP == NULL)
517 {
49309057
ILT		 518 if (! flag_keep_locals && bfd_is_local_label_name (stdoutput, name))
519 {
520 symbolP = md_undefined_symbol ((char *) name);
521 if (symbolP != NULL)
522 return symbolP;
523
524 symbolP = (symbolS *) local_symbol_make (name, undefined_section,
525 (valueT) 0,
526 &zero_address_frag);
527 return symbolP;
528 }
49309057 529
252b5132
RH		 530 symbolP = symbol_make (name);
531
532 symbol_table_insert (symbolP);
533 } /* if symbol wasn't found */
534
535 return (symbolP);
7c743825 536}
252b5132
RH		 537
538symbolS *
74937d39 539symbol_make (const char *name)
252b5132
RH		 540{
541 symbolS *symbolP;
542
7c743825 543 /* Let the machine description default it, e.g. for register names. */
252b5132
RH		 544 symbolP = md_undefined_symbol ((char *) name);
545
546 if (!symbolP)
547 symbolP = symbol_new (name, undefined_section, (valueT) 0, &zero_address_frag);
548
549 return (symbolP);
7c743825 550}
252b5132 551
9497f5ac
NC		 552symbolS *
553symbol_clone (symbolS *orgsymP, int replace)
554{
555 symbolS *newsymP;
6a2b6326 556 asymbol *bsymorg, *bsymnew;
9497f5ac
NC		 557
558 /* Running local_symbol_convert on a clone that's not the one currently
559 in local_hash would incorrectly replace the hash entry. Thus the
560 symbol must be converted here. Note that the rest of the function
561 depends on not encountering an unconverted symbol. */
562 if (LOCAL_SYMBOL_CHECK (orgsymP))
563 orgsymP = local_symbol_convert ((struct local_symbol *) orgsymP);
6a2b6326 564 bsymorg = orgsymP->bsym;
9497f5ac 565
9497f5ac
NC		 566 newsymP = obstack_alloc (&notes, sizeof (*newsymP));
567 *newsymP = *orgsymP;
6a2b6326
JB		 568 bsymnew = bfd_make_empty_symbol (bfd_asymbol_bfd (bsymorg));
569 if (bsymnew == NULL)
885afe7b 570 as_fatal ("bfd_make_empty_symbol: %s", bfd_errmsg (bfd_get_error ()));
6a2b6326
JB		 571 newsymP->bsym = bsymnew;
572 bsymnew->name = bsymorg->name;
573 bsymnew->flags = bsymorg->flags;
574 bsymnew->section = bsymorg->section;
6a2b6326
JB		 575 bfd_copy_private_symbol_data (bfd_asymbol_bfd (bsymorg), bsymorg,
576 bfd_asymbol_bfd (bsymnew), bsymnew);
577
578#ifdef obj_symbol_clone_hook
579 obj_symbol_clone_hook (newsymP, orgsymP);
580#endif
581
582#ifdef tc_symbol_clone_hook
583 tc_symbol_clone_hook (newsymP, orgsymP);
584#endif
9497f5ac
NC		 585
586 if (replace)
587 {
588 if (symbol_rootP == orgsymP)
589 symbol_rootP = newsymP;
590 else if (orgsymP->sy_previous)
591 {
592 orgsymP->sy_previous->sy_next = newsymP;
593 orgsymP->sy_previous = NULL;
594 }
595 if (symbol_lastP == orgsymP)
596 symbol_lastP = newsymP;
597 else if (orgsymP->sy_next)
598 orgsymP->sy_next->sy_previous = newsymP;
bdf128d6 599 orgsymP->sy_previous = orgsymP->sy_next = orgsymP;
9497f5ac
NC		 600 debug_verify_symchain (symbol_rootP, symbol_lastP);
601
602 symbol_table_insert (newsymP);
603 }
bdf128d6
JB		 604 else
605 newsymP->sy_previous = newsymP->sy_next = newsymP;
9497f5ac
NC		 606
607 return newsymP;
608}
609
610/* Referenced symbols, if they are forward references, need to be cloned
611 (without replacing the original) so that the value of the referenced
612 symbols at the point of use . */
613
614#undef symbol_clone_if_forward_ref
615symbolS *
616symbol_clone_if_forward_ref (symbolS *symbolP, int is_forward)
617{
618 if (symbolP && !LOCAL_SYMBOL_CHECK (symbolP))
619 {
620 symbolS *add_symbol = symbolP->sy_value.X_add_symbol;
621 symbolS *op_symbol = symbolP->sy_value.X_op_symbol;
622
623 if (symbolP->sy_forward_ref)
624 is_forward = 1;
625
626 if (is_forward)
627 {
628 /* assign_symbol() clones volatile symbols; pre-existing expressions
629 hold references to the original instance, but want the current
630 value. Just repeat the lookup. */
631 if (add_symbol && S_IS_VOLATILE (add_symbol))
632 add_symbol = symbol_find_exact (S_GET_NAME (add_symbol));
633 if (op_symbol && S_IS_VOLATILE (op_symbol))
634 op_symbol = symbol_find_exact (S_GET_NAME (op_symbol));
635 }
636
637 /* Re-using sy_resolving here, as this routine cannot get called from
638 symbol resolution code. */
639 if (symbolP->bsym->section == expr_section && !symbolP->sy_resolving)
640 {
641 symbolP->sy_resolving = 1;
642 add_symbol = symbol_clone_if_forward_ref (add_symbol, is_forward);
643 op_symbol = symbol_clone_if_forward_ref (op_symbol, is_forward);
644 symbolP->sy_resolving = 0;
645 }
646
647 if (symbolP->sy_forward_ref
648 || add_symbol != symbolP->sy_value.X_add_symbol
649 || op_symbol != symbolP->sy_value.X_op_symbol)
650 symbolP = symbol_clone (symbolP, 0);
651
652 symbolP->sy_value.X_add_symbol = add_symbol;
653 symbolP->sy_value.X_op_symbol = op_symbol;
654 }
655
656 return symbolP;
657}
658
b7d6ed97 659symbolS *
74937d39 660symbol_temp_new (segT seg, valueT ofs, fragS *frag)
b7d6ed97 661{
756d1d01 662 return symbol_new (FAKE_LABEL_NAME, seg, ofs, frag);
b7d6ed97
RH		 663}
664
665symbolS *
74937d39 666symbol_temp_new_now (void)
b7d6ed97
RH		 667{
668 return symbol_temp_new (now_seg, frag_now_fix (), frag_now);
669}
670
671symbolS *
74937d39 672symbol_temp_make (void)
b7d6ed97 673{
756d1d01 674 return symbol_make (FAKE_LABEL_NAME);
b7d6ed97
RH		 675}
676
7c743825
KH		 677/* Implement symbol table lookup.
678 In: A symbol's name as a string: '\0' can't be part of a symbol name.
679 Out: NULL if the name was not in the symbol table, else the address
680 of a struct symbol associated with that name. */
252b5132 681
9758f3fc 682symbolS *
74937d39 683symbol_find_exact (const char *name)
06e77878
AO		 684{
685 return symbol_find_exact_noref (name, 0);
686}
687
688symbolS *
689symbol_find_exact_noref (const char *name, int noref)
9758f3fc 690{
7be1c489 691 struct local_symbol *locsym;
06e77878 692 symbolS* sym;
9758f3fc 693
7be1c489
AM		 694 locsym = (struct local_symbol *) hash_find (local_hash, name);
695 if (locsym != NULL)
696 return (symbolS *) locsym;
9758f3fc 697
06e77878
AO		 698 sym = ((symbolS *) hash_find (sy_hash, name));
699
700 /* Any references to the symbol, except for the reference in
701 .weakref, must clear this flag, such that the symbol does not
702 turn into a weak symbol. Note that we don't have to handle the
703 local_symbol case, since a weakrefd is always promoted out of the
704 local_symbol table when it is turned into a weak symbol. */
705 if (sym && ! noref)
706 S_CLEAR_WEAKREFD (sym);
707
708 return sym;
9758f3fc
AM		 709}
710
252b5132 711symbolS *
91c4c449 712symbol_find (const char *name)
06e77878
AO		 713{
714 return symbol_find_noref (name, 0);
715}
716
717symbolS *
718symbol_find_noref (const char *name, int noref)
252b5132 719{
252b5132
RH		 720#ifdef tc_canonicalize_symbol_name
721 {
722 char *copy;
03987ced 723 size_t len = strlen (name) + 1;
252b5132 724
03987ced
RH		 725 copy = (char *) alloca (len);
726 memcpy (copy, name, len);
252b5132
RH		 727 name = tc_canonicalize_symbol_name (copy);
728 }
729#endif
730
731 if (! symbols_case_sensitive)
732 {
03987ced
RH		 733 char *copy;
734 const char *orig;
735 unsigned char c;
736
737 orig = name;
738 name = copy = (char *) alloca (strlen (name) + 1);
739
740 while ((c = *orig++) != '\0')
741 {
3882b010 742 *copy++ = TOUPPER (c);
03987ced
RH		 743 }
744 *copy = '\0';
252b5132
RH		 745 }
746
06e77878 747 return symbol_find_exact_noref (name, noref);
252b5132
RH		 748}
749
7c743825
KH		 750/* Once upon a time, symbols were kept in a singly linked list. At
751 least coff needs to be able to rearrange them from time to time, for
752 which a doubly linked list is much more convenient. Loic did these
753 as macros which seemed dangerous to me so they're now functions.
754 xoxorich. */
755
756/* Link symbol ADDME after symbol TARGET in the chain. */
252b5132 757
7c743825 758void
74937d39
KH		 759symbol_append (symbolS *addme, symbolS *target,
760 symbolS **rootPP, symbolS **lastPP)
252b5132 761{
49309057
ILT		 762 if (LOCAL_SYMBOL_CHECK (addme))
763 abort ();
764 if (target != NULL && LOCAL_SYMBOL_CHECK (target))
765 abort ();
766
252b5132
RH		 767 if (target == NULL)
768 {
769 know (*rootPP == NULL);
770 know (*lastPP == NULL);
771 addme->sy_next = NULL;
252b5132 772 addme->sy_previous = NULL;
252b5132
RH		 773 *rootPP = addme;
774 *lastPP = addme;
775 return;
7c743825 776 } /* if the list is empty */
252b5132
RH		 777
778 if (target->sy_next != NULL)
779 {
252b5132 780 target->sy_next->sy_previous = addme;
252b5132
RH		 781 }
782 else
783 {
784 know (*lastPP == target);
785 *lastPP = addme;
7c743825 786 } /* if we have a next */
252b5132
RH		 787
788 addme->sy_next = target->sy_next;
789 target->sy_next = addme;
252b5132 790 addme->sy_previous = target;
252b5132
RH		 791
792 debug_verify_symchain (symbol_rootP, symbol_lastP);
793}
794
7c743825
KH		 795/* Set the chain pointers of SYMBOL to null. */
796
797void
74937d39 798symbol_clear_list_pointers (symbolS *symbolP)
252b5132 799{
49309057
ILT		 800 if (LOCAL_SYMBOL_CHECK (symbolP))
801 abort ();
252b5132 802 symbolP->sy_next = NULL;
252b5132 803 symbolP->sy_previous = NULL;
252b5132
RH		 804}
805
7c743825
KH		 806/* Remove SYMBOLP from the list. */
807
808void
74937d39 809symbol_remove (symbolS *symbolP, symbolS **rootPP, symbolS **lastPP)
252b5132 810{
49309057
ILT		 811 if (LOCAL_SYMBOL_CHECK (symbolP))
812 abort ();
813
252b5132
RH		 814 if (symbolP == *rootPP)
815 {
816 *rootPP = symbolP->sy_next;
7c743825 817 } /* if it was the root */
252b5132
RH		 818
819 if (symbolP == *lastPP)
820 {
821 *lastPP = symbolP->sy_previous;
7c743825 822 } /* if it was the tail */
252b5132
RH		 823
824 if (symbolP->sy_next != NULL)
825 {
826 symbolP->sy_next->sy_previous = symbolP->sy_previous;
7c743825 827 } /* if not last */
252b5132
RH		 828
829 if (symbolP->sy_previous != NULL)
830 {
831 symbolP->sy_previous->sy_next = symbolP->sy_next;
7c743825 832 } /* if not first */
252b5132
RH		 833
834 debug_verify_symchain (*rootPP, *lastPP);
835}
836
7c743825
KH		 837/* Link symbol ADDME before symbol TARGET in the chain. */
838
839void
74937d39
KH		 840symbol_insert (symbolS *addme, symbolS *target,
841 symbolS **rootPP, symbolS **lastPP ATTRIBUTE_UNUSED)
252b5132 842{
49309057
ILT		 843 if (LOCAL_SYMBOL_CHECK (addme))
844 abort ();
845 if (LOCAL_SYMBOL_CHECK (target))
846 abort ();
847
252b5132
RH		 848 if (target->sy_previous != NULL)
849 {
850 target->sy_previous->sy_next = addme;
851 }
852 else
853 {
854 know (*rootPP == target);
855 *rootPP = addme;
7c743825 856 } /* if not first */
252b5132
RH		 857
858 addme->sy_previous = target->sy_previous;
859 target->sy_previous = addme;
860 addme->sy_next = target;
861
862 debug_verify_symchain (*rootPP, *lastPP);
863}
864
7c743825 865void
74937d39 866verify_symbol_chain (symbolS *rootP, symbolS *lastP)
252b5132
RH		 867{
868 symbolS *symbolP = rootP;
869
870 if (symbolP == NULL)
871 return;
872
873 for (; symbol_next (symbolP) != NULL; symbolP = symbol_next (symbolP))
874 {
49309057 875 assert (symbolP->bsym != NULL);
252b5132 876 assert (symbolP->sy_next->sy_previous == symbolP);
252b5132
RH		 877 }
878
879 assert (lastP == symbolP);
880}
881
280d71bf
DB		 882#ifdef OBJ_COMPLEX_RELC
883
884static int
885use_complex_relocs_for (symbolS * symp)
886{
887 switch (symp->sy_value.X_op)
888 {
889 case O_constant:
890 return 0;
891
892 case O_symbol:
893 case O_symbol_rva:
894 case O_uminus:
895 case O_bit_not:
896 case O_logical_not:
897 if ( (S_IS_COMMON (symp->sy_value.X_add_symbol)
898 || S_IS_LOCAL (symp->sy_value.X_add_symbol))
899 &&
900 (S_IS_DEFINED (symp->sy_value.X_add_symbol)
901 && S_GET_SEGMENT (symp->sy_value.X_add_symbol) != expr_section))
902 return 0;
903 break;
904
905 case O_multiply:
906 case O_divide:
907 case O_modulus:
908 case O_left_shift:
909 case O_right_shift:
910 case O_bit_inclusive_or:
911 case O_bit_or_not:
912 case O_bit_exclusive_or:
913 case O_bit_and:
914 case O_add:
915 case O_subtract:
916 case O_eq:
917 case O_ne:
918 case O_lt:
919 case O_le:
920 case O_ge:
921 case O_gt:
922 case O_logical_and:
923 case O_logical_or:
924
925 if ( (S_IS_COMMON (symp->sy_value.X_add_symbol)
926 || S_IS_LOCAL (symp->sy_value.X_add_symbol))
927 &&
928 (S_IS_COMMON (symp->sy_value.X_op_symbol)
929 || S_IS_LOCAL (symp->sy_value.X_op_symbol))
930
931 && S_IS_DEFINED (symp->sy_value.X_add_symbol)
932 && S_IS_DEFINED (symp->sy_value.X_op_symbol)
933 && S_GET_SEGMENT (symp->sy_value.X_add_symbol) != expr_section
934 && S_GET_SEGMENT (symp->sy_value.X_op_symbol) != expr_section)
935 return 0;
936 break;
937
938 default:
939 break;
940 }
941 return 1;
942}
943#endif
944
0909233e 945static void
74937d39 946report_op_error (symbolS *symp, symbolS *left, symbolS *right)
0909233e
AM		 947{
948 char *file;
949 unsigned int line;
950 segT seg_left = S_GET_SEGMENT (left);
951 segT seg_right = right ? S_GET_SEGMENT (right) : 0;
1d3b2b27 952
0909233e
AM		 953 if (expr_symbol_where (symp, &file, &line))
954 {
955 if (seg_left == undefined_section)
956 as_bad_where (file, line,
957 _("undefined symbol `%s' in operation"),
958 S_GET_NAME (left));
959 if (seg_right == undefined_section)
960 as_bad_where (file, line,
961 _("undefined symbol `%s' in operation"),
962 S_GET_NAME (right));
963 if (seg_left != undefined_section
964 && seg_right != undefined_section)
965 {
966 if (right)
967 as_bad_where (file, line,
968 _("invalid sections for operation on `%s' and `%s'"),
969 S_GET_NAME (left), S_GET_NAME (right));
970 else
971 as_bad_where (file, line,
972 _("invalid section for operation on `%s'"),
973 S_GET_NAME (left));
974 }
1d3b2b27 975
0909233e
AM		 976 }
977 else
978 {
979 if (seg_left == undefined_section)
980 as_bad (_("undefined symbol `%s' in operation setting `%s'"),
981 S_GET_NAME (left), S_GET_NAME (symp));
982 if (seg_right == undefined_section)
983 as_bad (_("undefined symbol `%s' in operation setting `%s'"),
984 S_GET_NAME (right), S_GET_NAME (symp));
985 if (seg_left != undefined_section
986 && seg_right != undefined_section)
987 {
988 if (right)
d9e05e4e
AM		 989 as_bad (_("invalid sections for operation on `%s' and `%s' setting `%s'"),
990 S_GET_NAME (left), S_GET_NAME (right), S_GET_NAME (symp));
0909233e 991 else
d9e05e4e
AM		 992 as_bad (_("invalid section for operation on `%s' setting `%s'"),
993 S_GET_NAME (left), S_GET_NAME (symp));
0909233e
AM		 994 }
995 }
996}
997
252b5132
RH		 998/* Resolve the value of a symbol. This is called during the final
999 pass over the symbol table to resolve any symbols with complex
1000 values. */
1001
1002valueT
74937d39 1003resolve_symbol_value (symbolS *symp)
252b5132
RH		 1004{
1005 int resolved;
03e83a45 1006 valueT final_val = 0;
252b5132
RH		 1007 segT final_seg;
1008
49309057
ILT		 1009 if (LOCAL_SYMBOL_CHECK (symp))
1010 {
1011 struct local_symbol *locsym = (struct local_symbol *) symp;
1012
bd780143 1013 final_val = locsym->lsy_value;
49309057 1014 if (local_symbol_resolved_p (locsym))
bd780143 1015 return final_val;
49309057 1016
bd780143 1017 final_val += local_symbol_get_frag (locsym)->fr_address / OCTETS_PER_BYTE;
49309057 1018
6386f3a7 1019 if (finalize_syms)
49309057 1020 {
bd780143 1021 locsym->lsy_value = final_val;
49309057
ILT		 1022 local_symbol_mark_resolved (locsym);
1023 }
1024
1025 return final_val;
1026 }
1027
252b5132
RH		 1028 if (symp->sy_resolved)
1029 {
1030 if (symp->sy_value.X_op == O_constant)
1031 return (valueT) symp->sy_value.X_add_number;
1032 else
1033 return 0;
1034 }
1035
1036 resolved = 0;
1037 final_seg = S_GET_SEGMENT (symp);
1038
1039 if (symp->sy_resolving)
1040 {
6386f3a7 1041 if (finalize_syms)
0e389e77 1042 as_bad (_("symbol definition loop encountered at `%s'"),
7c743825 1043 S_GET_NAME (symp));
252b5132
RH		 1044 final_val = 0;
1045 resolved = 1;
1046 }
280d71bf
DB		 1047#ifdef OBJ_COMPLEX_RELC
1048 else if (final_seg == expr_section
1049 && use_complex_relocs_for (symp))
1050 {
1051 symbolS * relc_symbol = NULL;
1052 char * relc_symbol_name = NULL;
1053
1054 relc_symbol_name = symbol_relc_make_expr (& symp->sy_value);
1055
1056 /* For debugging, print out conversion input & output. */
1057#ifdef DEBUG_SYMS
1058 print_expr (& symp->sy_value);
1059 if (relc_symbol_name)
1060 fprintf (stderr, "-> relc symbol: %s\n", relc_symbol_name);
1061#endif
1062
1063 if (relc_symbol_name != NULL)
1064 relc_symbol = symbol_new (relc_symbol_name, undefined_section,
1065 0, & zero_address_frag);
1066
1067 if (relc_symbol == NULL)
1068 {
1069 as_bad (_("cannot convert expression symbol %s to complex relocation"),
1070 S_GET_NAME (symp));
1071 resolved = 0;
1072 }
1073 else
1074 {
1075 symbol_table_insert (relc_symbol);
1076
1077 /* S_CLEAR_EXTERNAL (relc_symbol); */
1078 if (symp->bsym->flags & BSF_SRELC)
1079 relc_symbol->bsym->flags |= BSF_SRELC;
1080 else
1081 relc_symbol->bsym->flags |= BSF_RELC;
1082 /* symp->bsym->flags |= BSF_RELC; */
1083 copy_symbol_attributes (symp, relc_symbol);
1084 symp->sy_value.X_op = O_symbol;
1085 symp->sy_value.X_add_symbol = relc_symbol;
1086 symp->sy_value.X_add_number = 0;
1087 resolved = 1;
1088 }
1089
1090 final_seg = undefined_section;
1091 goto exit_dont_set_value;
1092 }
1093#endif
252b5132
RH		 1094 else
1095 {
1096 symbolS *add_symbol, *op_symbol;
1097 offsetT left, right;
1098 segT seg_left, seg_right;
1099 operatorT op;
2d034539 1100 int move_seg_ok;
252b5132
RH		 1101
1102 symp->sy_resolving = 1;
1103
1104 /* Help out with CSE. */
1105 add_symbol = symp->sy_value.X_add_symbol;
1106 op_symbol = symp->sy_value.X_op_symbol;
1107 final_val = symp->sy_value.X_add_number;
1108 op = symp->sy_value.X_op;
1109
1110 switch (op)
1111 {
1112 default:
1113 BAD_CASE (op);
1114 break;
1115
1116 case O_absent:
1117 final_val = 0;
1118 /* Fall through. */
1119
1120 case O_constant:
bea9907b 1121 final_val += symp->sy_frag->fr_address / OCTETS_PER_BYTE;
252b5132
RH		 1122 if (final_seg == expr_section)
1123 final_seg = absolute_section;
db557034
AM		 1124 /* Fall through. */
1125
1126 case O_register:
252b5132
RH		 1127 resolved = 1;
1128 break;
1129
1130 case O_symbol:
1131 case O_symbol_rva:
6386f3a7 1132 left = resolve_symbol_value (add_symbol);
e0890092
AM		 1133 seg_left = S_GET_SEGMENT (add_symbol);
1134 if (finalize_syms)
1135 symp->sy_value.X_op_symbol = NULL;
252b5132 1136
e0890092 1137 do_symbol:
06e77878
AO		 1138 if (S_IS_WEAKREFR (symp))
1139 {
1140 assert (final_val == 0);
1141 if (S_IS_WEAKREFR (add_symbol))
1142 {
1143 assert (add_symbol->sy_value.X_op == O_symbol
1144 && add_symbol->sy_value.X_add_number == 0);
1145 add_symbol = add_symbol->sy_value.X_add_symbol;
1146 assert (! S_IS_WEAKREFR (add_symbol));
1147 symp->sy_value.X_add_symbol = add_symbol;
1148 }
1149 }
1150
252b5132
RH		 1151 if (symp->sy_mri_common)
1152 {
1153 /* This is a symbol inside an MRI common section. The
e0890092
AM		 1154 relocation routines are going to handle it specially.
1155 Don't change the value. */
49309057 1156 resolved = symbol_resolved_p (add_symbol);
252b5132
RH		 1157 break;
1158 }
1159
6386f3a7 1160 if (finalize_syms && final_val == 0)
49309057
ILT		 1161 {
1162 if (LOCAL_SYMBOL_CHECK (add_symbol))
1163 add_symbol = local_symbol_convert ((struct local_symbol *)
1164 add_symbol);
1165 copy_symbol_attributes (symp, add_symbol);
1166 }
252b5132 1167
e0890092
AM		 1168 /* If we have equated this symbol to an undefined or common
1169 symbol, keep X_op set to O_symbol, and don't change
1170 X_add_number. This permits the routine which writes out
1171 relocation to detect this case, and convert the
1172 relocation to be against the symbol to which this symbol
1173 is equated. */
977cdf5a 1174 if (! S_IS_DEFINED (add_symbol)
7be1c489 1175#if defined (OBJ_COFF) && defined (TE_PE)
977cdf5a
NC		 1176 || S_IS_WEAK (add_symbol)
1177#endif
1178 || S_IS_COMMON (add_symbol))
252b5132 1179 {
6386f3a7 1180 if (finalize_syms)
252b5132 1181 {
252b5132
RH		 1182 symp->sy_value.X_op = O_symbol;
1183 symp->sy_value.X_add_symbol = add_symbol;
1184 symp->sy_value.X_add_number = final_val;
e0890092
AM		 1185 /* Use X_op_symbol as a flag. */
1186 symp->sy_value.X_op_symbol = add_symbol;
1187 final_seg = seg_left;
252b5132
RH		 1188 }
1189 final_val = 0;
49309057 1190 resolved = symbol_resolved_p (add_symbol);
c89c8534 1191 symp->sy_resolving = 0;
252b5132
RH		 1192 goto exit_dont_set_value;
1193 }
0023dd27
AM		 1194 else if (finalize_syms
1195 && ((final_seg == expr_section && seg_left != expr_section)
1196 || symbol_shadow_p (symp)))
e0890092
AM		 1197 {
1198 /* If the symbol is an expression symbol, do similarly
1199 as for undefined and common syms above. Handles
1200 "sym +/- expr" where "expr" cannot be evaluated
1201 immediately, and we want relocations to be against
1202 "sym", eg. because it is weak. */
1203 symp->sy_value.X_op = O_symbol;
1204 symp->sy_value.X_add_symbol = add_symbol;
1205 symp->sy_value.X_add_number = final_val;
1206 symp->sy_value.X_op_symbol = add_symbol;
1207 final_seg = seg_left;
1208 final_val += symp->sy_frag->fr_address + left;
1209 resolved = symbol_resolved_p (add_symbol);
1210 symp->sy_resolving = 0;
1211 goto exit_dont_set_value;
1212 }
252b5132
RH		 1213 else
1214 {
1215 final_val += symp->sy_frag->fr_address + left;
1216 if (final_seg == expr_section || final_seg == undefined_section)
e0890092 1217 final_seg = seg_left;
252b5132
RH		 1218 }
1219
49309057 1220 resolved = symbol_resolved_p (add_symbol);
06e77878
AO		 1221 if (S_IS_WEAKREFR (symp))
1222 goto exit_dont_set_value;
252b5132
RH		 1223 break;
1224
1225 case O_uminus:
1226 case O_bit_not:
1227 case O_logical_not:
6386f3a7 1228 left = resolve_symbol_value (add_symbol);
784b640d 1229 seg_left = S_GET_SEGMENT (add_symbol);
252b5132 1230
0909233e
AM		 1231 /* By reducing these to the relevant dyadic operator, we get
1232 !S -> S == 0 permitted on anything,
1233 -S -> 0 - S only permitted on absolute
1234 ~S -> S ^ ~0 only permitted on absolute */
1235 if (op != O_logical_not && seg_left != absolute_section
1236 && finalize_syms)
1237 report_op_error (symp, add_symbol, NULL);
1d3b2b27 1238
0909233e
AM		 1239 if (final_seg == expr_section || final_seg == undefined_section)
1240 final_seg = absolute_section;
1d3b2b27 1241
252b5132
RH		 1242 if (op == O_uminus)
1243 left = -left;
1244 else if (op == O_logical_not)
1245 left = !left;
1246 else
1247 left = ~left;
1248
1249 final_val += left + symp->sy_frag->fr_address;
252b5132 1250
49309057 1251 resolved = symbol_resolved_p (add_symbol);
252b5132
RH		 1252 break;
1253
1254 case O_multiply:
1255 case O_divide:
1256 case O_modulus:
1257 case O_left_shift:
1258 case O_right_shift:
1259 case O_bit_inclusive_or:
1260 case O_bit_or_not:
1261 case O_bit_exclusive_or:
1262 case O_bit_and:
1263 case O_add:
1264 case O_subtract:
1265 case O_eq:
1266 case O_ne:
1267 case O_lt:
1268 case O_le:
1269 case O_ge:
1270 case O_gt:
1271 case O_logical_and:
1272 case O_logical_or:
6386f3a7
AM		 1273 left = resolve_symbol_value (add_symbol);
1274 right = resolve_symbol_value (op_symbol);
252b5132
RH		 1275 seg_left = S_GET_SEGMENT (add_symbol);
1276 seg_right = S_GET_SEGMENT (op_symbol);
1277
1278 /* Simplify addition or subtraction of a constant by folding the
1279 constant into X_add_number. */
e0890092 1280 if (op == O_add)
252b5132
RH		 1281 {
1282 if (seg_right == absolute_section)
1283 {
e0890092 1284 final_val += right;
252b5132
RH		 1285 goto do_symbol;
1286 }
e0890092 1287 else if (seg_left == absolute_section)
252b5132 1288 {
252b5132
RH		 1289 final_val += left;
1290 add_symbol = op_symbol;
1291 left = right;
e0890092
AM		 1292 seg_left = seg_right;
1293 goto do_symbol;
1294 }
1295 }
1296 else if (op == O_subtract)
1297 {
1298 if (seg_right == absolute_section)
1299 {
1300 final_val -= right;
252b5132
RH		 1301 goto do_symbol;
1302 }
1303 }
1304
2d034539 1305 move_seg_ok = 1;
e0890092
AM		 1306 /* Equality and non-equality tests are permitted on anything.
1307 Subtraction, and other comparison operators are permitted if
1308 both operands are in the same section. Otherwise, both
1309 operands must be absolute. We already handled the case of
1310 addition or subtraction of a constant above. This will
1311 probably need to be changed for an object file format which
2d034539
NC		 1312 supports arbitrary expressions, such as IEEE-695. */
1313 if (!(seg_left == absolute_section
0909233e
AM		 1314 && seg_right == absolute_section)
1315 && !(op == O_eq || op == O_ne)
1316 && !((op == O_subtract
1317 || op == O_lt || op == O_le || op == O_ge || op == O_gt)
1318 && seg_left == seg_right
1319 && (seg_left != undefined_section
1320 || add_symbol == op_symbol)))
2d034539
NC		 1321 {
1322 /* Don't emit messages unless we're finalizing the symbol value,
1323 otherwise we may get the same message multiple times. */
1324 if (finalize_syms)
1325 report_op_error (symp, add_symbol, op_symbol);
1326 /* However do not move the symbol into the absolute section
1327 if it cannot currently be resolved - this would confuse
1328 other parts of the assembler into believing that the
1329 expression had been evaluated to zero. */
1330 else
1331 move_seg_ok = 0;
1332 }
1d3b2b27 1333
2d034539
NC		 1334 if (move_seg_ok
1335 && (final_seg == expr_section || final_seg == undefined_section))
0909233e 1336 final_seg = absolute_section;
252b5132
RH		 1337
1338 /* Check for division by zero. */
1339 if ((op == O_divide || op == O_modulus) && right == 0)
1340 {
1341 /* If seg_right is not absolute_section, then we've
e0890092 1342 already issued a warning about using a bad symbol. */
6386f3a7 1343 if (seg_right == absolute_section && finalize_syms)
252b5132
RH		 1344 {
1345 char *file;
1346 unsigned int line;
1347
1348 if (expr_symbol_where (symp, &file, &line))
1349 as_bad_where (file, line, _("division by zero"));
1350 else
0e389e77 1351 as_bad (_("division by zero when setting `%s'"),
252b5132
RH		 1352 S_GET_NAME (symp));
1353 }
1354
1355 right = 1;
1356 }
1357
1358 switch (symp->sy_value.X_op)
1359 {
1360 case O_multiply: left *= right; break;
1361 case O_divide: left /= right; break;
1362 case O_modulus: left %= right; break;
1363 case O_left_shift: left <<= right; break;
1364 case O_right_shift: left >>= right; break;
1365 case O_bit_inclusive_or: left |= right; break;
1366 case O_bit_or_not: left |= ~right; break;
1367 case O_bit_exclusive_or: left ^= right; break;
1368 case O_bit_and: left &= right; break;
1369 case O_add: left += right; break;
1370 case O_subtract: left -= right; break;
e0890092
AM		 1371 case O_eq:
1372 case O_ne:
1373 left = (left == right && seg_left == seg_right
1374 && (seg_left != undefined_section
1375 || add_symbol == op_symbol)
1376 ? ~ (offsetT) 0 : 0);
1377 if (symp->sy_value.X_op == O_ne)
1378 left = ~left;
1379 break;
252b5132
RH		 1380 case O_lt: left = left < right ? ~ (offsetT) 0 : 0; break;
1381 case O_le: left = left <= right ? ~ (offsetT) 0 : 0; break;
1382 case O_ge: left = left >= right ? ~ (offsetT) 0 : 0; break;
1383 case O_gt: left = left > right ? ~ (offsetT) 0 : 0; break;
1384 case O_logical_and: left = left && right; break;
1385 case O_logical_or: left = left || right; break;
1386 default: abort ();
1387 }
1388
1389 final_val += symp->sy_frag->fr_address + left;
1390 if (final_seg == expr_section || final_seg == undefined_section)
784b640d
AM		 1391 {
1392 if (seg_left == undefined_section
1393 || seg_right == undefined_section)
1394 final_seg = undefined_section;
1395 else if (seg_left == absolute_section)
1396 final_seg = seg_right;
1397 else
1398 final_seg = seg_left;
1399 }
49309057
ILT		 1400 resolved = (symbol_resolved_p (add_symbol)
1401 && symbol_resolved_p (op_symbol));
7c743825 1402 break;
252b5132 1403
252b5132
RH		 1404 case O_big:
1405 case O_illegal:
1406 /* Give an error (below) if not in expr_section. We don't
1407 want to worry about expr_section symbols, because they
1408 are fictional (they are created as part of expression
1409 resolution), and any problems may not actually mean
1410 anything. */
1411 break;
1412 }
1413
1414 symp->sy_resolving = 0;
1415 }
1416
6386f3a7 1417 if (finalize_syms)
05bdb37e 1418 S_SET_VALUE (symp, final_val);
252b5132 1419
05bdb37e
AM		 1420exit_dont_set_value:
1421 /* Always set the segment, even if not finalizing the value.
1422 The segment is used to determine whether a symbol is defined. */
05bdb37e 1423 S_SET_SEGMENT (symp, final_seg);
252b5132 1424
252b5132 1425 /* Don't worry if we can't resolve an expr_section symbol. */
6386f3a7 1426 if (finalize_syms)
252b5132
RH		 1427 {
1428 if (resolved)
1429 symp->sy_resolved = 1;
1430 else if (S_GET_SEGMENT (symp) != expr_section)
1431 {
0e389e77 1432 as_bad (_("can't resolve value for symbol `%s'"),
7c743825 1433 S_GET_NAME (symp));
252b5132
RH		 1434 symp->sy_resolved = 1;
1435 }
1436 }
1437
1438 return final_val;
1439}
1440
74937d39 1441static void resolve_local_symbol (const char *, PTR);
49309057
ILT		 1442
1443/* A static function passed to hash_traverse. */
1444
1445static void
74937d39 1446resolve_local_symbol (const char *key ATTRIBUTE_UNUSED, PTR value)
49309057
ILT		 1447{
1448 if (value != NULL)
6386f3a7 1449 resolve_symbol_value (value);
49309057
ILT		 1450}
1451
49309057
ILT		 1452/* Resolve all local symbols. */
1453
1454void
74937d39 1455resolve_local_symbol_values (void)
49309057 1456{
49309057 1457 hash_traverse (local_hash, resolve_local_symbol);
49309057
ILT		 1458}
1459
9497f5ac
NC		 1460/* Obtain the current value of a symbol without changing any
1461 sub-expressions used. */
1462
1463int
2e1e12b1 1464snapshot_symbol (symbolS **symbolPP, valueT *valueP, segT *segP, fragS **fragPP)
9497f5ac 1465{
2e1e12b1
JB		 1466 symbolS *symbolP = *symbolPP;
1467
9497f5ac
NC		 1468 if (LOCAL_SYMBOL_CHECK (symbolP))
1469 {
1470 struct local_symbol *locsym = (struct local_symbol *) symbolP;
1471
1472 *valueP = locsym->lsy_value;
1473 *segP = locsym->lsy_section;
1474 *fragPP = local_symbol_get_frag (locsym);
1475 }
1476 else
1477 {
1478 expressionS expr = symbolP->sy_value;
1479
1480 if (!symbolP->sy_resolved && expr.X_op != O_illegal)
1481 {
1482 int resolved;
1483
1484 if (symbolP->sy_resolving)
1485 return 0;
1486 symbolP->sy_resolving = 1;
1487 resolved = resolve_expression (&expr);
1488 symbolP->sy_resolving = 0;
1489 if (!resolved)
1490 return 0;
1491
1492 switch (expr.X_op)
1493 {
1494 case O_constant:
1495 case O_register:
2e1e12b1 1496 if (!symbol_equated_p (symbolP))
9497f5ac
NC		 1497 break;
1498 /* Fall thru. */
1499 case O_symbol:
1500 case O_symbol_rva:
1501 symbolP = expr.X_add_symbol;
1502 break;
1503 default:
1504 return 0;
1505 }
1506 }
1507
4dcb3903
L		 1508 /* Never change a defined symbol. */
1509 if (symbolP->bsym->section == undefined_section
1510 || symbolP->bsym->section == expr_section)
1511 *symbolPP = symbolP;
9497f5ac
NC		 1512 *valueP = expr.X_add_number;
1513 *segP = symbolP->bsym->section;
1514 *fragPP = symbolP->sy_frag;
1515
1516 if (*segP == expr_section)
1517 switch (expr.X_op)
1518 {
1519 case O_constant: *segP = absolute_section; break;
1520 case O_register: *segP = reg_section; break;
1521 default: break;
1522 }
1523 }
1524
1525 return 1;
1526}
1527
252b5132
RH		 1528/* Dollar labels look like a number followed by a dollar sign. Eg, "42$".
1529 They are *really* local. That is, they go out of scope whenever we see a
1530 label that isn't local. Also, like fb labels, there can be multiple
1531 instances of a dollar label. Therefor, we name encode each instance with
1532 the instance number, keep a list of defined symbols separate from the real
1533 symbol table, and we treat these buggers as a sparse array. */
1534
1535static long *dollar_labels;
1536static long *dollar_label_instances;
1537static char *dollar_label_defines;
1538static unsigned long dollar_label_count;
1539static unsigned long dollar_label_max;
1540
7c743825 1541int
74937d39 1542dollar_label_defined (long label)
252b5132
RH		 1543{
1544 long *i;
1545
1546 know ((dollar_labels != NULL) || (dollar_label_count == 0));
1547
1548 for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
1549 if (*i == label)
1550 return dollar_label_defines[i - dollar_labels];
1551
7c743825 1552 /* If we get here, label isn't defined. */
252b5132 1553 return 0;
7c743825 1554}
252b5132
RH		 1555
1556static long
74937d39 1557dollar_label_instance (long label)
252b5132
RH		 1558{
1559 long *i;
1560
1561 know ((dollar_labels != NULL) || (dollar_label_count == 0));
1562
1563 for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
1564 if (*i == label)
1565 return (dollar_label_instances[i - dollar_labels]);
1566
7c743825
KH		 1567 /* If we get here, we haven't seen the label before.
1568 Therefore its instance count is zero. */
252b5132
RH		 1569 return 0;
1570}
1571
7c743825 1572void
74937d39 1573dollar_label_clear (void)
252b5132
RH		 1574{
1575 memset (dollar_label_defines, '\0', (unsigned int) dollar_label_count);
1576}
1577
1578#define DOLLAR_LABEL_BUMP_BY 10
1579
7c743825 1580void
74937d39 1581define_dollar_label (long label)
252b5132
RH		 1582{
1583 long *i;
1584
1585 for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
1586 if (*i == label)
1587 {
1588 ++dollar_label_instances[i - dollar_labels];
1589 dollar_label_defines[i - dollar_labels] = 1;
1590 return;
1591 }
1592
7c743825 1593 /* If we get to here, we don't have label listed yet. */
252b5132
RH		 1594
1595 if (dollar_labels == NULL)
1596 {
1597 dollar_labels = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long));
1598 dollar_label_instances = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long));
1599 dollar_label_defines = xmalloc (DOLLAR_LABEL_BUMP_BY);
1600 dollar_label_max = DOLLAR_LABEL_BUMP_BY;
1601 dollar_label_count = 0;
1602 }
1603 else if (dollar_label_count == dollar_label_max)
1604 {
1605 dollar_label_max += DOLLAR_LABEL_BUMP_BY;
1606 dollar_labels = (long *) xrealloc ((char *) dollar_labels,
1607 dollar_label_max * sizeof (long));
1608 dollar_label_instances = (long *) xrealloc ((char *) dollar_label_instances,
1609 dollar_label_max * sizeof (long));
1610 dollar_label_defines = xrealloc (dollar_label_defines, dollar_label_max);
7c743825 1611 } /* if we needed to grow */
252b5132
RH		 1612
1613 dollar_labels[dollar_label_count] = label;
1614 dollar_label_instances[dollar_label_count] = 1;
1615 dollar_label_defines[dollar_label_count] = 1;
1616 ++dollar_label_count;
1617}
1618
7c743825
KH		 1619/* Caller must copy returned name: we re-use the area for the next name.
1620
1621 The mth occurence of label n: is turned into the symbol "Ln^Am"
1622 where n is the label number and m is the instance number. "L" makes
1623 it a label discarded unless debugging and "^A"('\1') ensures no
1624 ordinary symbol SHOULD get the same name as a local label
1625 symbol. The first "4:" is "L4^A1" - the m numbers begin at 1.
1626
1627 fb labels get the same treatment, except that ^B is used in place
1628 of ^A. */
1629
1630char * /* Return local label name. */
74937d39
KH		 1631dollar_label_name (register long n, /* we just saw "n$:" : n a number. */
1632 register int augend /* 0 for current instance, 1 for new instance. */)
252b5132
RH		 1633{
1634 long i;
7c743825 1635 /* Returned to caller, then copied. Used for created names ("4f"). */
252b5132
RH		 1636 static char symbol_name_build[24];
1637 register char *p;
1638 register char *q;
7c743825 1639 char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */
252b5132
RH		 1640
1641 know (n >= 0);
1642 know (augend == 0 || augend == 1);
1643 p = symbol_name_build;
f84dd1f0
NC		 1644#ifdef LOCAL_LABEL_PREFIX
1645 *p++ = LOCAL_LABEL_PREFIX;
1646#endif
252b5132
RH		 1647 *p++ = 'L';
1648
7c743825
KH		 1649 /* Next code just does sprintf( {}, "%d", n); */
1650 /* Label number. */
252b5132
RH		 1651 q = symbol_name_temporary;
1652 for (*q++ = 0, i = n; i; ++q)
1653 {
1654 *q = i % 10 + '0';
1655 i /= 10;
1656 }
1657 while ((*p = *--q) != '\0')
1658 ++p;
1659
aa257fcd 1660 *p++ = DOLLAR_LABEL_CHAR; /* ^A */
252b5132 1661
7c743825 1662 /* Instance number. */
252b5132
RH		 1663 q = symbol_name_temporary;
1664 for (*q++ = 0, i = dollar_label_instance (n) + augend; i; ++q)
1665 {
1666 *q = i % 10 + '0';
1667 i /= 10;
1668 }
1669 while ((*p++ = *--q) != '\0');;
1670
7c743825 1671 /* The label, as a '\0' ended string, starts at symbol_name_build. */
252b5132
RH		 1672 return symbol_name_build;
1673}
1674
47eebc20 1675/* Somebody else's idea of local labels. They are made by "n:" where n
7c743825
KH		 1676 is any decimal digit. Refer to them with
1677 "nb" for previous (backward) n:
1678 or "nf" for next (forward) n:.
1679
1680 We do a little better and let n be any number, not just a single digit, but
1681 since the other guy's assembler only does ten, we treat the first ten
1682 specially.
1683
1684 Like someone else's assembler, we have one set of local label counters for
1685 entire assembly, not one set per (sub)segment like in most assemblers. This
1686 implies that one can refer to a label in another segment, and indeed some
1687 crufty compilers have done just that.
1688
1689 Since there could be a LOT of these things, treat them as a sparse
1690 array. */
252b5132
RH		 1691
1692#define FB_LABEL_SPECIAL (10)
1693
1694static long fb_low_counter[FB_LABEL_SPECIAL];
1695static long *fb_labels;
1696static long *fb_label_instances;
1697static long fb_label_count;
1698static long fb_label_max;
1699
7c743825 1700/* This must be more than FB_LABEL_SPECIAL. */
252b5132
RH		 1701#define FB_LABEL_BUMP_BY (FB_LABEL_SPECIAL + 6)
1702
7c743825 1703static void
74937d39 1704fb_label_init (void)
252b5132
RH		 1705{
1706 memset ((void *) fb_low_counter, '\0', sizeof (fb_low_counter));
7c743825 1707}
252b5132 1708
7c743825
KH		 1709/* Add one to the instance number of this fb label. */
1710
1711void
74937d39 1712fb_label_instance_inc (long label)
252b5132
RH		 1713{
1714 long *i;
1715
1716 if (label < FB_LABEL_SPECIAL)
1717 {
1718 ++fb_low_counter[label];
1719 return;
1720 }
1721
1722 if (fb_labels != NULL)
1723 {
1724 for (i = fb_labels + FB_LABEL_SPECIAL;
1725 i < fb_labels + fb_label_count; ++i)
1726 {
1727 if (*i == label)
1728 {
1729 ++fb_label_instances[i - fb_labels];
1730 return;
7c743825
KH		 1731 } /* if we find it */
1732 } /* for each existing label */
252b5132
RH		 1733 }
1734
7c743825 1735 /* If we get to here, we don't have label listed yet. */
252b5132
RH		 1736
1737 if (fb_labels == NULL)
1738 {
1739 fb_labels = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long));
1740 fb_label_instances = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long));
1741 fb_label_max = FB_LABEL_BUMP_BY;
1742 fb_label_count = FB_LABEL_SPECIAL;
1743
1744 }
1745 else if (fb_label_count == fb_label_max)
1746 {
1747 fb_label_max += FB_LABEL_BUMP_BY;
1748 fb_labels = (long *) xrealloc ((char *) fb_labels,
1749 fb_label_max * sizeof (long));
1750 fb_label_instances = (long *) xrealloc ((char *) fb_label_instances,
1751 fb_label_max * sizeof (long));
7c743825 1752 } /* if we needed to grow */
252b5132
RH		 1753
1754 fb_labels[fb_label_count] = label;
1755 fb_label_instances[fb_label_count] = 1;
1756 ++fb_label_count;
1757}
1758
7c743825 1759static long
74937d39 1760fb_label_instance (long label)
252b5132
RH		 1761{
1762 long *i;
1763
1764 if (label < FB_LABEL_SPECIAL)
1765 {
1766 return (fb_low_counter[label]);
1767 }
1768
1769 if (fb_labels != NULL)
1770 {
1771 for (i = fb_labels + FB_LABEL_SPECIAL;
1772 i < fb_labels + fb_label_count; ++i)
1773 {
1774 if (*i == label)
1775 {
1776 return (fb_label_instances[i - fb_labels]);
7c743825
KH		 1777 } /* if we find it */
1778 } /* for each existing label */
252b5132
RH		 1779 }
1780
1781 /* We didn't find the label, so this must be a reference to the
1782 first instance. */
1783 return 0;
1784}
1785
7c743825
KH		 1786/* Caller must copy returned name: we re-use the area for the next name.
1787
1788 The mth occurence of label n: is turned into the symbol "Ln^Bm"
1789 where n is the label number and m is the instance number. "L" makes
1790 it a label discarded unless debugging and "^B"('\2') ensures no
1791 ordinary symbol SHOULD get the same name as a local label
1792 symbol. The first "4:" is "L4^B1" - the m numbers begin at 1.
1793
1794 dollar labels get the same treatment, except that ^A is used in
1795 place of ^B. */
1796
1797char * /* Return local label name. */
74937d39
KH		 1798fb_label_name (long n, /* We just saw "n:", "nf" or "nb" : n a number. */
1799 long augend /* 0 for nb, 1 for n:, nf. */)
252b5132
RH		 1800{
1801 long i;
7c743825 1802 /* Returned to caller, then copied. Used for created names ("4f"). */
252b5132
RH		 1803 static char symbol_name_build[24];
1804 register char *p;
1805 register char *q;
7c743825 1806 char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */
252b5132
RH		 1807
1808 know (n >= 0);
a76903bf 1809#ifdef TC_MMIX
71ba24a1 1810 know ((unsigned long) augend <= 2 /* See mmix_fb_label. */);
a76903bf 1811#else
71ba24a1 1812 know ((unsigned long) augend <= 1);
a76903bf 1813#endif
252b5132 1814 p = symbol_name_build;
aa257fcd
NC		 1815#ifdef LOCAL_LABEL_PREFIX
1816 *p++ = LOCAL_LABEL_PREFIX;
1817#endif
252b5132
RH		 1818 *p++ = 'L';
1819
7c743825
KH		 1820 /* Next code just does sprintf( {}, "%d", n); */
1821 /* Label number. */
252b5132
RH		 1822 q = symbol_name_temporary;
1823 for (*q++ = 0, i = n; i; ++q)
1824 {
1825 *q = i % 10 + '0';
1826 i /= 10;
1827 }
1828 while ((*p = *--q) != '\0')
1829 ++p;
1830
aa257fcd 1831 *p++ = LOCAL_LABEL_CHAR; /* ^B */
252b5132 1832
7c743825 1833 /* Instance number. */
252b5132
RH		 1834 q = symbol_name_temporary;
1835 for (*q++ = 0, i = fb_label_instance (n) + augend; i; ++q)
1836 {
1837 *q = i % 10 + '0';
1838 i /= 10;
1839 }
1840 while ((*p++ = *--q) != '\0');;
1841
7c743825 1842 /* The label, as a '\0' ended string, starts at symbol_name_build. */
252b5132 1843 return (symbol_name_build);
7c743825 1844}
252b5132 1845
7c743825
KH		 1846/* Decode name that may have been generated by foo_label_name() above.
1847 If the name wasn't generated by foo_label_name(), then return it
1848 unaltered. This is used for error messages. */
252b5132
RH		 1849
1850char *
74937d39 1851decode_local_label_name (char *s)
252b5132
RH		 1852{
1853 char *p;
1854 char *symbol_decode;
1855 int label_number;
1856 int instance_number;
1857 char *type;
d95767bf 1858 const char *message_format;
aa257fcd 1859 int index = 0;
43ad3147 1860
aa257fcd
NC		 1861#ifdef LOCAL_LABEL_PREFIX
1862 if (s[index] == LOCAL_LABEL_PREFIX)
1863 ++index;
1864#endif
43ad3147 1865
aa257fcd 1866 if (s[index] != 'L')
252b5132
RH		 1867 return s;
1868
3882b010 1869 for (label_number = 0, p = s + index + 1; ISDIGIT (*p); ++p)
252b5132
RH		 1870 label_number = (10 * label_number) + *p - '0';
1871
aa257fcd 1872 if (*p == DOLLAR_LABEL_CHAR)
252b5132 1873 type = "dollar";
aa257fcd 1874 else if (*p == LOCAL_LABEL_CHAR)
252b5132
RH		 1875 type = "fb";
1876 else
1877 return s;
1878
3882b010 1879 for (instance_number = 0, p++; ISDIGIT (*p); ++p)
252b5132
RH		 1880 instance_number = (10 * instance_number) + *p - '0';
1881
d95767bf 1882 message_format = _("\"%d\" (instance number %d of a %s label)");
252b5132
RH		 1883 symbol_decode = obstack_alloc (&notes, strlen (message_format) + 30);
1884 sprintf (symbol_decode, message_format, label_number, instance_number, type);
1885
1886 return symbol_decode;
1887}
1888
1889/* Get the value of a symbol. */
1890
1891valueT
74937d39 1892S_GET_VALUE (symbolS *s)
252b5132 1893{
49309057 1894 if (LOCAL_SYMBOL_CHECK (s))
ac62c346 1895 return resolve_symbol_value (s);
49309057 1896
ac62c346 1897 if (!s->sy_resolved)
e46d99eb 1898 {
6386f3a7
AM		 1899 valueT val = resolve_symbol_value (s);
1900 if (!finalize_syms)
e46d99eb
AM		 1901 return val;
1902 }
06e77878
AO		 1903 if (S_IS_WEAKREFR (s))
1904 return S_GET_VALUE (s->sy_value.X_add_symbol);
1905
252b5132
RH		 1906 if (s->sy_value.X_op != O_constant)
1907 {
252b5132
RH		 1908 if (! s->sy_resolved
1909 || s->sy_value.X_op != O_symbol
1910 || (S_IS_DEFINED (s) && ! S_IS_COMMON (s)))
0e389e77 1911 as_bad (_("attempt to get value of unresolved symbol `%s'"),
252b5132 1912 S_GET_NAME (s));
252b5132
RH		 1913 }
1914 return (valueT) s->sy_value.X_add_number;
1915}
1916
1917/* Set the value of a symbol. */
1918
1919void
74937d39 1920S_SET_VALUE (symbolS *s, valueT val)
252b5132 1921{
49309057
ILT		 1922 if (LOCAL_SYMBOL_CHECK (s))
1923 {
bd780143 1924 ((struct local_symbol *) s)->lsy_value = val;
49309057
ILT		 1925 return;
1926 }
1927
252b5132
RH		 1928 s->sy_value.X_op = O_constant;
1929 s->sy_value.X_add_number = (offsetT) val;
1930 s->sy_value.X_unsigned = 0;
06e77878 1931 S_CLEAR_WEAKREFR (s);
252b5132
RH		 1932}
1933
1934void
74937d39 1935copy_symbol_attributes (symbolS *dest, symbolS *src)
252b5132 1936{
49309057 1937 if (LOCAL_SYMBOL_CHECK (dest))
7f2f689c 1938 dest = local_symbol_convert ((struct local_symbol *) dest);
49309057 1939 if (LOCAL_SYMBOL_CHECK (src))
7f2f689c 1940 src = local_symbol_convert ((struct local_symbol *) src);
49309057 1941
252b5132
RH		 1942 /* In an expression, transfer the settings of these flags.
1943 The user can override later, of course. */
1944#define COPIED_SYMFLAGS (BSF_FUNCTION | BSF_OBJECT)
1945 dest->bsym->flags |= src->bsym->flags & COPIED_SYMFLAGS;
252b5132
RH		 1946
1947#ifdef OBJ_COPY_SYMBOL_ATTRIBUTES
1948 OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src);
1949#endif
794ba86a
DJ		 1950
1951#ifdef TC_COPY_SYMBOL_ATTRIBUTES
1952 TC_COPY_SYMBOL_ATTRIBUTES (dest, src);
1953#endif
252b5132
RH		 1954}
1955
252b5132 1956int
74937d39 1957S_IS_FUNCTION (symbolS *s)
252b5132 1958{
49309057
ILT		 1959 flagword flags;
1960
1961 if (LOCAL_SYMBOL_CHECK (s))
1962 return 0;
1963
1964 flags = s->bsym->flags;
252b5132
RH		 1965
1966 return (flags & BSF_FUNCTION) != 0;
1967}
1968
1969int
74937d39 1970S_IS_EXTERNAL (symbolS *s)
252b5132 1971{
49309057
ILT		 1972 flagword flags;
1973
1974 if (LOCAL_SYMBOL_CHECK (s))
1975 return 0;
1976
1977 flags = s->bsym->flags;
252b5132 1978
7c743825 1979 /* Sanity check. */
252b5132
RH		 1980 if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL))
1981 abort ();
1982
1983 return (flags & BSF_GLOBAL) != 0;
1984}
1985
1986int
74937d39 1987S_IS_WEAK (symbolS *s)
252b5132 1988{
49309057
ILT		 1989 if (LOCAL_SYMBOL_CHECK (s))
1990 return 0;
06e77878
AO		 1991 /* Conceptually, a weakrefr is weak if the referenced symbol is. We
1992 could probably handle a WEAKREFR as always weak though. E.g., if
1993 the referenced symbol has lost its weak status, there's no reason
1994 to keep handling the weakrefr as if it was weak. */
1995 if (S_IS_WEAKREFR (s))
1996 return S_IS_WEAK (s->sy_value.X_add_symbol);
252b5132
RH		 1997 return (s->bsym->flags & BSF_WEAK) != 0;
1998}
1999
06e77878
AO		 2000int
2001S_IS_WEAKREFR (symbolS *s)
2002{
2003 if (LOCAL_SYMBOL_CHECK (s))
2004 return 0;
2005 return s->sy_weakrefr != 0;
2006}
2007
2008int
2009S_IS_WEAKREFD (symbolS *s)
2010{
2011 if (LOCAL_SYMBOL_CHECK (s))
2012 return 0;
2013 return s->sy_weakrefd != 0;
2014}
2015
252b5132 2016int
74937d39 2017S_IS_COMMON (symbolS *s)
252b5132 2018{
49309057
ILT		 2019 if (LOCAL_SYMBOL_CHECK (s))
2020 return 0;
252b5132
RH		 2021 return bfd_is_com_section (s->bsym->section);
2022}
2023
2024int
74937d39 2025S_IS_DEFINED (symbolS *s)
252b5132 2026{
49309057
ILT		 2027 if (LOCAL_SYMBOL_CHECK (s))
2028 return ((struct local_symbol *) s)->lsy_section != undefined_section;
252b5132
RH		 2029 return s->bsym->section != undefined_section;
2030}
2031
a161fe53
AM		 2032
2033#ifndef EXTERN_FORCE_RELOC
2034#define EXTERN_FORCE_RELOC IS_ELF
2035#endif
2036
2037/* Return true for symbols that should not be reduced to section
2038 symbols or eliminated from expressions, because they may be
2039 overridden by the linker. */
2040int
74937d39 2041S_FORCE_RELOC (symbolS *s, int strict)
a161fe53
AM		 2042{
2043 if (LOCAL_SYMBOL_CHECK (s))
2044 return ((struct local_symbol *) s)->lsy_section == undefined_section;
2045
ae6063d4
AM		 2046 return ((strict
2047 && ((s->bsym->flags & BSF_WEAK) != 0
2048 || (EXTERN_FORCE_RELOC
2049 && (s->bsym->flags & BSF_GLOBAL) != 0)))
a161fe53
AM		 2050 || s->bsym->section == undefined_section
2051 || bfd_is_com_section (s->bsym->section));
2052}
2053
252b5132 2054int
74937d39 2055S_IS_DEBUG (symbolS *s)
252b5132 2056{
49309057
ILT		 2057 if (LOCAL_SYMBOL_CHECK (s))
2058 return 0;
252b5132
RH		 2059 if (s->bsym->flags & BSF_DEBUGGING)
2060 return 1;
2061 return 0;
2062}
2063
2064int
74937d39 2065S_IS_LOCAL (symbolS *s)
252b5132 2066{
49309057 2067 flagword flags;
252b5132
RH		 2068 const char *name;
2069
49309057
ILT		 2070 if (LOCAL_SYMBOL_CHECK (s))
2071 return 1;
2072
2073 flags = s->bsym->flags;
2074
7c743825 2075 /* Sanity check. */
252b5132
RH		 2076 if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL))
2077 abort ();
2078
2079 if (bfd_get_section (s->bsym) == reg_section)
2080 return 1;
2081
2082 if (flag_strip_local_absolute
bb82af9f
NC		 2083 /* Keep BSF_FILE symbols in order to allow debuggers to identify
2084 the source file even when the object file is stripped. */
2085 && (flags & (BSF_GLOBAL | BSF_FILE)) == 0
252b5132
RH		 2086 && bfd_get_section (s->bsym) == absolute_section)
2087 return 1;
2088
2089 name = S_GET_NAME (s);
2090 return (name != NULL
2091 && ! S_IS_DEBUG (s)
aa257fcd
NC		 2092 && (strchr (name, DOLLAR_LABEL_CHAR)
2093 || strchr (name, LOCAL_LABEL_CHAR)
252b5132
RH		 2094 || (! flag_keep_locals
2095 && (bfd_is_local_label (stdoutput, s->bsym)
2096 || (flag_mri
2097 && name[0] == '?'
2098 && name[1] == '?')))));
2099}
2100
252b5132 2101int
74937d39 2102S_IS_STABD (symbolS *s)
252b5132
RH		 2103{
2104 return S_GET_NAME (s) == 0;
2105}
2106
9497f5ac
NC		 2107int
2108S_IS_VOLATILE (const symbolS *s)
2109{
2110 if (LOCAL_SYMBOL_CHECK (s))
2111 return 0;
2112 return s->sy_volatile;
2113}
2114
2115int
2116S_IS_FORWARD_REF (const symbolS *s)
2117{
2118 if (LOCAL_SYMBOL_CHECK (s))
2119 return 0;
2120 return s->sy_forward_ref;
2121}
2122
9758f3fc 2123const char *
74937d39 2124S_GET_NAME (symbolS *s)
252b5132 2125{
49309057
ILT		 2126 if (LOCAL_SYMBOL_CHECK (s))
2127 return ((struct local_symbol *) s)->lsy_name;
252b5132
RH		 2128 return s->bsym->name;
2129}
2130
2131segT
74937d39 2132S_GET_SEGMENT (symbolS *s)
252b5132 2133{
49309057
ILT		 2134 if (LOCAL_SYMBOL_CHECK (s))
2135 return ((struct local_symbol *) s)->lsy_section;
252b5132
RH		 2136 return s->bsym->section;
2137}
2138
2139void
74937d39 2140S_SET_SEGMENT (symbolS *s, segT seg)
252b5132
RH		 2141{
2142 /* Don't reassign section symbols. The direct reason is to prevent seg
2143 faults assigning back to const global symbols such as *ABS*, but it
2144 shouldn't happen anyway. */
2145
49309057
ILT		 2146 if (LOCAL_SYMBOL_CHECK (s))
2147 {
2148 if (seg == reg_section)
2149 s = local_symbol_convert ((struct local_symbol *) s);
2150 else
2151 {
2152 ((struct local_symbol *) s)->lsy_section = seg;
2153 return;
2154 }
2155 }
2156
252b5132
RH		 2157 if (s->bsym->flags & BSF_SECTION_SYM)
2158 {
2159 if (s->bsym->section != seg)
7c743825 2160 abort ();
252b5132
RH		 2161 }
2162 else
2163 s->bsym->section = seg;
2164}
2165
2166void
74937d39 2167S_SET_EXTERNAL (symbolS *s)
252b5132 2168{
49309057
ILT		 2169 if (LOCAL_SYMBOL_CHECK (s))
2170 s = local_symbol_convert ((struct local_symbol *) s);
252b5132
RH		 2171 if ((s->bsym->flags & BSF_WEAK) != 0)
2172 {
2173 /* Let .weak override .global. */
2174 return;
2175 }
4d7c34bf
NC		 2176 if (s->bsym->flags & BSF_SECTION_SYM)
2177 {
2178 char * file;
2179 unsigned int line;
d1a6c242 2180
4d7c34bf
NC		 2181 /* Do not reassign section symbols. */
2182 as_where (& file, & line);
2183 as_warn_where (file, line,
0e389e77 2184 _("section symbols are already global"));
4d7c34bf
NC		 2185 return;
2186 }
d0548f34
L		 2187 if (S_GET_SEGMENT (s) == reg_section)
2188 {
2189 as_bad ("can't make register symbol `%s' global",
2190 S_GET_NAME (s));
2191 return;
2192 }
252b5132 2193 s->bsym->flags |= BSF_GLOBAL;
7c743825 2194 s->bsym->flags &= ~(BSF_LOCAL | BSF_WEAK);
977cdf5a
NC		 2195
2196#ifdef USE_UNIQUE
2197 if (! an_external_name && S_GET_NAME(s)[0] != '.')
2198 an_external_name = S_GET_NAME (s);
2199#endif
252b5132
RH		 2200}
2201
2202void
74937d39 2203S_CLEAR_EXTERNAL (symbolS *s)
252b5132 2204{
49309057
ILT		 2205 if (LOCAL_SYMBOL_CHECK (s))
2206 return;
252b5132
RH		 2207 if ((s->bsym->flags & BSF_WEAK) != 0)
2208 {
2209 /* Let .weak override. */
2210 return;
2211 }
2212 s->bsym->flags |= BSF_LOCAL;
7c743825 2213 s->bsym->flags &= ~(BSF_GLOBAL | BSF_WEAK);
252b5132
RH		 2214}
2215
2216void
74937d39 2217S_SET_WEAK (symbolS *s)
252b5132 2218{
49309057
ILT		 2219 if (LOCAL_SYMBOL_CHECK (s))
2220 s = local_symbol_convert ((struct local_symbol *) s);
06e77878
AO		 2221#ifdef obj_set_weak_hook
2222 obj_set_weak_hook (s);
2223#endif
252b5132 2224 s->bsym->flags |= BSF_WEAK;
7c743825 2225 s->bsym->flags &= ~(BSF_GLOBAL | BSF_LOCAL);
252b5132
RH		 2226}
2227
06e77878
AO		 2228void
2229S_SET_WEAKREFR (symbolS *s)
2230{
2231 if (LOCAL_SYMBOL_CHECK (s))
2232 s = local_symbol_convert ((struct local_symbol *) s);
2233 s->sy_weakrefr = 1;
2234 /* If the alias was already used, make sure we mark the target as
2235 used as well, otherwise it might be dropped from the symbol
2236 table. This may have unintended side effects if the alias is
2237 later redirected to another symbol, such as keeping the unused
2238 previous target in the symbol table. Since it will be weak, it's
2239 not a big deal. */
2240 if (s->sy_used)
2241 symbol_mark_used (s->sy_value.X_add_symbol);
2242}
2243
2244void
2245S_CLEAR_WEAKREFR (symbolS *s)
2246{
2247 if (LOCAL_SYMBOL_CHECK (s))
2248 return;
2249 s->sy_weakrefr = 0;
2250}
2251
2252void
2253S_SET_WEAKREFD (symbolS *s)
2254{
2255 if (LOCAL_SYMBOL_CHECK (s))
2256 s = local_symbol_convert ((struct local_symbol *) s);
2257 s->sy_weakrefd = 1;
2258 S_SET_WEAK (s);
2259}
2260
2261void
2262S_CLEAR_WEAKREFD (symbolS *s)
2263{
2264 if (LOCAL_SYMBOL_CHECK (s))
2265 return;
2266 if (s->sy_weakrefd)
2267 {
2268 s->sy_weakrefd = 0;
2269 /* If a weakref target symbol is weak, then it was never
2270 referenced directly before, not even in a .global directive,
2271 so decay it to local. If it remains undefined, it will be
2272 later turned into a global, like any other undefined
2273 symbol. */
2274 if (s->bsym->flags & BSF_WEAK)
2275 {
2276#ifdef obj_clear_weak_hook
2277 obj_clear_weak_hook (s);
2278#endif
2279 s->bsym->flags &= ~BSF_WEAK;
2280 s->bsym->flags |= BSF_LOCAL;
2281 }
2282 }
2283}
2284
00f7efb6 2285void
74937d39 2286S_SET_THREAD_LOCAL (symbolS *s)
00f7efb6
JJ		 2287{
2288 if (LOCAL_SYMBOL_CHECK (s))
2289 s = local_symbol_convert ((struct local_symbol *) s);
2290 if (bfd_is_com_section (s->bsym->section)
2291 && (s->bsym->flags & BSF_THREAD_LOCAL) != 0)
2292 return;
2293 s->bsym->flags |= BSF_THREAD_LOCAL;
2294 if ((s->bsym->flags & BSF_FUNCTION) != 0)
2295 as_bad (_("Accessing function `%s' as thread-local object"),
2296 S_GET_NAME (s));
2297 else if (! bfd_is_und_section (s->bsym->section)
2298 && (s->bsym->section->flags & SEC_THREAD_LOCAL) == 0)
2299 as_bad (_("Accessing `%s' as thread-local object"),
2300 S_GET_NAME (s));
2301}
2302
252b5132 2303void
977cdf5a 2304S_SET_NAME (symbolS *s, const char *name)
252b5132 2305{
49309057
ILT		 2306 if (LOCAL_SYMBOL_CHECK (s))
2307 {
2308 ((struct local_symbol *) s)->lsy_name = name;
2309 return;
2310 }
252b5132
RH		 2311 s->bsym->name = name;
2312}
49309057 2313
9497f5ac
NC		 2314void
2315S_SET_VOLATILE (symbolS *s)
2316{
2317 if (LOCAL_SYMBOL_CHECK (s))
2318 s = local_symbol_convert ((struct local_symbol *) s);
2319 s->sy_volatile = 1;
2320}
2321
92757bc9
JB		 2322void
2323S_CLEAR_VOLATILE (symbolS *s)
2324{
2325 if (!LOCAL_SYMBOL_CHECK (s))
2326 s->sy_volatile = 0;
2327}
2328
9497f5ac
NC		 2329void
2330S_SET_FORWARD_REF (symbolS *s)
2331{
2332 if (LOCAL_SYMBOL_CHECK (s))
2333 s = local_symbol_convert ((struct local_symbol *) s);
2334 s->sy_forward_ref = 1;
2335}
2336
49309057
ILT		 2337/* Return the previous symbol in a chain. */
2338
2339symbolS *
74937d39 2340symbol_previous (symbolS *s)
49309057
ILT		 2341{
2342 if (LOCAL_SYMBOL_CHECK (s))
2343 abort ();
2344 return s->sy_previous;
2345}
2346
49309057
ILT		 2347/* Return the next symbol in a chain. */
2348
2349symbolS *
74937d39 2350symbol_next (symbolS *s)
49309057
ILT		 2351{
2352 if (LOCAL_SYMBOL_CHECK (s))
2353 abort ();
2354 return s->sy_next;
2355}
2356
2357/* Return a pointer to the value of a symbol as an expression. */
2358
2359expressionS *
74937d39 2360symbol_get_value_expression (symbolS *s)
49309057
ILT		 2361{
2362 if (LOCAL_SYMBOL_CHECK (s))
2363 s = local_symbol_convert ((struct local_symbol *) s);
2364 return &s->sy_value;
2365}
2366
2367/* Set the value of a symbol to an expression. */
2368
2369void
74937d39 2370symbol_set_value_expression (symbolS *s, const expressionS *exp)
49309057
ILT		 2371{
2372 if (LOCAL_SYMBOL_CHECK (s))
2373 s = local_symbol_convert ((struct local_symbol *) s);
2374 s->sy_value = *exp;
06e77878 2375 S_CLEAR_WEAKREFR (s);
49309057
ILT		 2376}
2377
be95a9c1
AM		 2378/* Return a pointer to the X_add_number component of a symbol. */
2379
514d955d 2380offsetT *
be95a9c1
AM		 2381symbol_X_add_number (symbolS *s)
2382{
be95a9c1 2383 if (LOCAL_SYMBOL_CHECK (s))
514d955d 2384 return (offsetT *) &((struct local_symbol *) s)->lsy_value;
be95a9c1 2385
514d955d 2386 return &s->sy_value.X_add_number;
be95a9c1
AM		 2387}
2388
b7d6ed97
RH		 2389/* Set the value of SYM to the current position in the current segment. */
2390
2391void
74937d39 2392symbol_set_value_now (symbolS *sym)
b7d6ed97
RH		 2393{
2394 S_SET_SEGMENT (sym, now_seg);
2395 S_SET_VALUE (sym, frag_now_fix ());
2396 symbol_set_frag (sym, frag_now);
2397}
2398
49309057
ILT		 2399/* Set the frag of a symbol. */
2400
2401void
74937d39 2402symbol_set_frag (symbolS *s, fragS *f)
49309057
ILT		 2403{
2404 if (LOCAL_SYMBOL_CHECK (s))
2405 {
2406 local_symbol_set_frag ((struct local_symbol *) s, f);
2407 return;
2408 }
2409 s->sy_frag = f;
06e77878 2410 S_CLEAR_WEAKREFR (s);
49309057
ILT		 2411}
2412
2413/* Return the frag of a symbol. */
2414
2415fragS *
74937d39 2416symbol_get_frag (symbolS *s)
49309057
ILT		 2417{
2418 if (LOCAL_SYMBOL_CHECK (s))
2419 return local_symbol_get_frag ((struct local_symbol *) s);
2420 return s->sy_frag;
2421}
2422
2423/* Mark a symbol as having been used. */
2424
2425void
74937d39 2426symbol_mark_used (symbolS *s)
49309057
ILT		 2427{
2428 if (LOCAL_SYMBOL_CHECK (s))
2429 return;
2430 s->sy_used = 1;
06e77878
AO		 2431 if (S_IS_WEAKREFR (s))
2432 symbol_mark_used (s->sy_value.X_add_symbol);
49309057
ILT		 2433}
2434
2435/* Clear the mark of whether a symbol has been used. */
2436
2437void
74937d39 2438symbol_clear_used (symbolS *s)
49309057
ILT		 2439{
2440 if (LOCAL_SYMBOL_CHECK (s))
2441 s = local_symbol_convert ((struct local_symbol *) s);
2442 s->sy_used = 0;
2443}
2444
2445/* Return whether a symbol has been used. */
2446
2447int
74937d39 2448symbol_used_p (symbolS *s)
49309057
ILT		 2449{
2450 if (LOCAL_SYMBOL_CHECK (s))
2451 return 1;
2452 return s->sy_used;
2453}
2454
2455/* Mark a symbol as having been used in a reloc. */
2456
2457void
74937d39 2458symbol_mark_used_in_reloc (symbolS *s)
49309057
ILT		 2459{
2460 if (LOCAL_SYMBOL_CHECK (s))
2461 s = local_symbol_convert ((struct local_symbol *) s);
2462 s->sy_used_in_reloc = 1;
2463}
2464
2465/* Clear the mark of whether a symbol has been used in a reloc. */
2466
2467void
74937d39 2468symbol_clear_used_in_reloc (symbolS *s)
49309057
ILT		 2469{
2470 if (LOCAL_SYMBOL_CHECK (s))
2471 return;
2472 s->sy_used_in_reloc = 0;
2473}
2474
2475/* Return whether a symbol has been used in a reloc. */
2476
2477int
74937d39 2478symbol_used_in_reloc_p (symbolS *s)
49309057
ILT		 2479{
2480 if (LOCAL_SYMBOL_CHECK (s))
2481 return 0;
2482 return s->sy_used_in_reloc;
2483}
2484
2485/* Mark a symbol as an MRI common symbol. */
2486
2487void
74937d39 2488symbol_mark_mri_common (symbolS *s)
49309057
ILT		 2489{
2490 if (LOCAL_SYMBOL_CHECK (s))
2491 s = local_symbol_convert ((struct local_symbol *) s);
2492 s->sy_mri_common = 1;
2493}
2494
2495/* Clear the mark of whether a symbol is an MRI common symbol. */
2496
2497void
74937d39 2498symbol_clear_mri_common (symbolS *s)
49309057
ILT		 2499{
2500 if (LOCAL_SYMBOL_CHECK (s))
2501 return;
2502 s->sy_mri_common = 0;
2503}
2504
2505/* Return whether a symbol is an MRI common symbol. */
2506
2507int
74937d39 2508symbol_mri_common_p (symbolS *s)
49309057
ILT		 2509{
2510 if (LOCAL_SYMBOL_CHECK (s))
2511 return 0;
2512 return s->sy_mri_common;
2513}
2514
2515/* Mark a symbol as having been written. */
2516
2517void
74937d39 2518symbol_mark_written (symbolS *s)
49309057
ILT		 2519{
2520 if (LOCAL_SYMBOL_CHECK (s))
2521 return;
2522 s->written = 1;
2523}
2524
2525/* Clear the mark of whether a symbol has been written. */
2526
2527void
74937d39 2528symbol_clear_written (symbolS *s)
49309057
ILT		 2529{
2530 if (LOCAL_SYMBOL_CHECK (s))
2531 return;
2532 s->written = 0;
2533}
2534
2535/* Return whether a symbol has been written. */
2536
2537int
74937d39 2538symbol_written_p (symbolS *s)
49309057
ILT		 2539{
2540 if (LOCAL_SYMBOL_CHECK (s))
2541 return 0;
2542 return s->written;
2543}
2544
2545/* Mark a symbol has having been resolved. */
2546
2547void
74937d39 2548symbol_mark_resolved (symbolS *s)
49309057
ILT		 2549{
2550 if (LOCAL_SYMBOL_CHECK (s))
2551 {
2552 local_symbol_mark_resolved ((struct local_symbol *) s);
2553 return;
2554 }
2555 s->sy_resolved = 1;
2556}
2557
2558/* Return whether a symbol has been resolved. */
2559
2560int
74937d39 2561symbol_resolved_p (symbolS *s)
49309057
ILT		 2562{
2563 if (LOCAL_SYMBOL_CHECK (s))
2564 return local_symbol_resolved_p ((struct local_symbol *) s);
2565 return s->sy_resolved;
2566}
2567
2568/* Return whether a symbol is a section symbol. */
2569
2570int
74937d39 2571symbol_section_p (symbolS *s ATTRIBUTE_UNUSED)
49309057
ILT		 2572{
2573 if (LOCAL_SYMBOL_CHECK (s))
2574 return 0;
49309057 2575 return (s->bsym->flags & BSF_SECTION_SYM) != 0;
49309057
ILT		 2576}
2577
2578/* Return whether a symbol is equated to another symbol. */
2579
2580int
74937d39 2581symbol_equated_p (symbolS *s)
49309057
ILT		 2582{
2583 if (LOCAL_SYMBOL_CHECK (s))
2584 return 0;
2585 return s->sy_value.X_op == O_symbol;
2586}
2587
e0890092
AM		 2588/* Return whether a symbol is equated to another symbol, and should be
2589 treated specially when writing out relocs. */
2590
2591int
74937d39 2592symbol_equated_reloc_p (symbolS *s)
e0890092
AM		 2593{
2594 if (LOCAL_SYMBOL_CHECK (s))
2595 return 0;
2596 /* X_op_symbol, normally not used for O_symbol, is set by
2597 resolve_symbol_value to flag expression syms that have been
2598 equated. */
2599 return (s->sy_value.X_op == O_symbol
7be1c489 2600#if defined (OBJ_COFF) && defined (TE_PE)
977cdf5a
NC		 2601 && ! S_IS_WEAK (s)
2602#endif
e0890092
AM		 2603 && ((s->sy_resolved && s->sy_value.X_op_symbol != NULL)
2604 || ! S_IS_DEFINED (s)
2605 || S_IS_COMMON (s)));
2606}
2607
49309057
ILT		 2608/* Return whether a symbol has a constant value. */
2609
2610int
74937d39 2611symbol_constant_p (symbolS *s)
49309057
ILT		 2612{
2613 if (LOCAL_SYMBOL_CHECK (s))
2614 return 1;
2615 return s->sy_value.X_op == O_constant;
2616}
2617
bdf128d6
JB		 2618/* Return whether a symbol was cloned and thus removed from the global
2619 symbol list. */
2620
2621int
2622symbol_shadow_p (symbolS *s)
2623{
2624 if (LOCAL_SYMBOL_CHECK (s))
2625 return 0;
2626 return s->sy_next == s;
2627}
2628
49309057
ILT		 2629/* Return the BFD symbol for a symbol. */
2630
2631asymbol *
74937d39 2632symbol_get_bfdsym (symbolS *s)
49309057
ILT		 2633{
2634 if (LOCAL_SYMBOL_CHECK (s))
2635 s = local_symbol_convert ((struct local_symbol *) s);
2636 return s->bsym;
2637}
2638
2639/* Set the BFD symbol for a symbol. */
2640
2641void
74937d39 2642symbol_set_bfdsym (symbolS *s, asymbol *bsym)
49309057
ILT		 2643{
2644 if (LOCAL_SYMBOL_CHECK (s))
2645 s = local_symbol_convert ((struct local_symbol *) s);
22fe14ad
NC		 2646 /* Usually, it is harmless to reset a symbol to a BFD section
2647 symbol. For example, obj_elf_change_section sets the BFD symbol
2648 of an old symbol with the newly created section symbol. But when
2649 we have multiple sections with the same name, the newly created
2650 section may have the same name as an old section. We check if the
2651 old symbol has been already marked as a section symbol before
2652 resetting it. */
2653 if ((s->bsym->flags & BSF_SECTION_SYM) == 0)
2654 s->bsym = bsym;
2655 /* else XXX - What do we do now ? */
49309057
ILT		 2656}
2657
49309057
ILT		 2658#ifdef OBJ_SYMFIELD_TYPE
2659
2660/* Get a pointer to the object format information for a symbol. */
2661
2662OBJ_SYMFIELD_TYPE *
74937d39 2663symbol_get_obj (symbolS *s)
49309057
ILT		 2664{
2665 if (LOCAL_SYMBOL_CHECK (s))
2666 s = local_symbol_convert ((struct local_symbol *) s);
2667 return &s->sy_obj;
2668}
2669
2670/* Set the object format information for a symbol. */
2671
2672void
74937d39 2673symbol_set_obj (symbolS *s, OBJ_SYMFIELD_TYPE *o)
49309057
ILT		 2674{
2675 if (LOCAL_SYMBOL_CHECK (s))
2676 s = local_symbol_convert ((struct local_symbol *) s);
2677 s->sy_obj = *o;
2678}
2679
2680#endif /* OBJ_SYMFIELD_TYPE */
2681
2682#ifdef TC_SYMFIELD_TYPE
2683
2684/* Get a pointer to the processor information for a symbol. */
2685
2686TC_SYMFIELD_TYPE *
74937d39 2687symbol_get_tc (symbolS *s)
49309057
ILT		 2688{
2689 if (LOCAL_SYMBOL_CHECK (s))
2690 s = local_symbol_convert ((struct local_symbol *) s);
2691 return &s->sy_tc;
2692}
2693
2694/* Set the processor information for a symbol. */
2695
2696void
74937d39 2697symbol_set_tc (symbolS *s, TC_SYMFIELD_TYPE *o)
49309057
ILT		 2698{
2699 if (LOCAL_SYMBOL_CHECK (s))
2700 s = local_symbol_convert ((struct local_symbol *) s);
2701 s->sy_tc = *o;
2702}
2703
2704#endif /* TC_SYMFIELD_TYPE */
2705
252b5132 2706void
74937d39 2707symbol_begin (void)
252b5132
RH		 2708{
2709 symbol_lastP = NULL;
7c743825 2710 symbol_rootP = NULL; /* In case we have 0 symbols (!!) */
252b5132 2711 sy_hash = hash_new ();
49309057 2712 local_hash = hash_new ();
252b5132
RH		 2713
2714 memset ((char *) (&abs_symbol), '\0', sizeof (abs_symbol));
252b5132
RH		 2715#if defined (EMIT_SECTION_SYMBOLS) || !defined (RELOC_REQUIRES_SYMBOL)
2716 abs_symbol.bsym = bfd_abs_section.symbol;
252b5132
RH		 2717#endif
2718 abs_symbol.sy_value.X_op = O_constant;
2719 abs_symbol.sy_frag = &zero_address_frag;
2720
2721 if (LOCAL_LABELS_FB)
2722 fb_label_init ();
2723}
252b5132
RH		 2724\f
2725int indent_level;
2726
2727/* Maximum indent level.
2728 Available for modification inside a gdb session. */
87c245cc 2729static int max_indent_level = 8;
252b5132 2730
252b5132 2731void
74937d39 2732print_symbol_value_1 (FILE *file, symbolS *sym)
252b5132
RH		 2733{
2734 const char *name = S_GET_NAME (sym);
2735 if (!name || !name[0])
2736 name = "(unnamed)";
d2df793a
NC		 2737 fprintf (file, "sym ");
2738 fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) sym));
2739 fprintf (file, " %s", name);
49309057
ILT		 2740
2741 if (LOCAL_SYMBOL_CHECK (sym))
2742 {
2743 struct local_symbol *locsym = (struct local_symbol *) sym;
d2df793a
NC		 2744
2745 if (local_symbol_get_frag (locsym) != & zero_address_frag
49309057 2746 && local_symbol_get_frag (locsym) != NULL)
d2df793a
NC		 2747 {
2748 fprintf (file, " frag ");
2749 fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) local_symbol_get_frag (locsym)));
2750 }
49309057
ILT		 2751 if (local_symbol_resolved_p (locsym))
2752 fprintf (file, " resolved");
2753 fprintf (file, " local");
2754 }
2755 else
2756 {
2757 if (sym->sy_frag != &zero_address_frag)
d2df793a
NC		 2758 {
2759 fprintf (file, " frag ");
2760 fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) sym->sy_frag));
2761 }
49309057
ILT		 2762 if (sym->written)
2763 fprintf (file, " written");
2764 if (sym->sy_resolved)
2765 fprintf (file, " resolved");
2766 else if (sym->sy_resolving)
2767 fprintf (file, " resolving");
2768 if (sym->sy_used_in_reloc)
2769 fprintf (file, " used-in-reloc");
2770 if (sym->sy_used)
2771 fprintf (file, " used");
2772 if (S_IS_LOCAL (sym))
2773 fprintf (file, " local");
e97b3f28 2774 if (S_IS_EXTERNAL (sym))
49309057 2775 fprintf (file, " extern");
06e77878
AO		 2776 if (S_IS_WEAK (sym))
2777 fprintf (file, " weak");
49309057
ILT		 2778 if (S_IS_DEBUG (sym))
2779 fprintf (file, " debug");
2780 if (S_IS_DEFINED (sym))
2781 fprintf (file, " defined");
2782 }
06e77878
AO		 2783 if (S_IS_WEAKREFR (sym))
2784 fprintf (file, " weakrefr");
2785 if (S_IS_WEAKREFD (sym))
2786 fprintf (file, " weakrefd");
252b5132 2787 fprintf (file, " %s", segment_name (S_GET_SEGMENT (sym)));
49309057 2788 if (symbol_resolved_p (sym))
252b5132
RH		 2789 {
2790 segT s = S_GET_SEGMENT (sym);
2791
2792 if (s != undefined_section
411863a4 2793 && s != expr_section)
252b5132
RH		 2794 fprintf (file, " %lx", (long) S_GET_VALUE (sym));
2795 }
2796 else if (indent_level < max_indent_level
2797 && S_GET_SEGMENT (sym) != undefined_section)
2798 {
2799 indent_level++;
2800 fprintf (file, "\n%*s<", indent_level * 4, "");
49309057
ILT		 2801 if (LOCAL_SYMBOL_CHECK (sym))
2802 fprintf (file, "constant %lx",
bd780143 2803 (long) ((struct local_symbol *) sym)->lsy_value);
49309057
ILT		 2804 else
2805 print_expr_1 (file, &sym->sy_value);
252b5132
RH		 2806 fprintf (file, ">");
2807 indent_level--;
2808 }
2809 fflush (file);
2810}
2811
2812void
74937d39 2813print_symbol_value (symbolS *sym)
252b5132
RH		 2814{
2815 indent_level = 0;
2816 print_symbol_value_1 (stderr, sym);
2817 fprintf (stderr, "\n");
2818}
2819
2820static void
74937d39 2821print_binary (FILE *file, const char *name, expressionS *exp)
252b5132
RH		 2822{
2823 indent_level++;
2824 fprintf (file, "%s\n%*s<", name, indent_level * 4, "");
2825 print_symbol_value_1 (file, exp->X_add_symbol);
2826 fprintf (file, ">\n%*s<", indent_level * 4, "");
2827 print_symbol_value_1 (file, exp->X_op_symbol);
2828 fprintf (file, ">");
2829 indent_level--;
2830}
2831
2832void
74937d39 2833print_expr_1 (FILE *file, expressionS *exp)
252b5132 2834{
d2df793a
NC		 2835 fprintf (file, "expr ");
2836 fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) exp));
2837 fprintf (file, " ");
252b5132
RH		 2838 switch (exp->X_op)
2839 {
2840 case O_illegal:
2841 fprintf (file, "illegal");
2842 break;
2843 case O_absent:
2844 fprintf (file, "absent");
2845 break;
2846 case O_constant:
2847 fprintf (file, "constant %lx", (long) exp->X_add_number);
2848 break;
2849 case O_symbol:
2850 indent_level++;
2851 fprintf (file, "symbol\n%*s<", indent_level * 4, "");
2852 print_symbol_value_1 (file, exp->X_add_symbol);
2853 fprintf (file, ">");
2854 maybe_print_addnum:
2855 if (exp->X_add_number)
2856 fprintf (file, "\n%*s%lx", indent_level * 4, "",
2857 (long) exp->X_add_number);
2858 indent_level--;
2859 break;
2860 case O_register:
2861 fprintf (file, "register #%d", (int) exp->X_add_number);
2862 break;
2863 case O_big:
2864 fprintf (file, "big");
2865 break;
2866 case O_uminus:
2867 fprintf (file, "uminus -<");
2868 indent_level++;
2869 print_symbol_value_1 (file, exp->X_add_symbol);
2870 fprintf (file, ">");
2871 goto maybe_print_addnum;
2872 case O_bit_not:
2873 fprintf (file, "bit_not");
2874 break;
2875 case O_multiply:
2876 print_binary (file, "multiply", exp);
2877 break;
2878 case O_divide:
2879 print_binary (file, "divide", exp);
2880 break;
2881 case O_modulus:
2882 print_binary (file, "modulus", exp);
2883 break;
2884 case O_left_shift:
2885 print_binary (file, "lshift", exp);
2886 break;
2887 case O_right_shift:
2888 print_binary (file, "rshift", exp);
2889 break;
2890 case O_bit_inclusive_or:
2891 print_binary (file, "bit_ior", exp);
2892 break;
2893 case O_bit_exclusive_or:
2894 print_binary (file, "bit_xor", exp);
2895 break;
2896 case O_bit_and:
2897 print_binary (file, "bit_and", exp);
2898 break;
2899 case O_eq:
2900 print_binary (file, "eq", exp);
2901 break;
2902 case O_ne:
2903 print_binary (file, "ne", exp);
2904 break;
2905 case O_lt:
2906 print_binary (file, "lt", exp);
2907 break;
2908 case O_le:
2909 print_binary (file, "le", exp);
2910 break;
2911 case O_ge:
2912 print_binary (file, "ge", exp);
2913 break;
2914 case O_gt:
2915 print_binary (file, "gt", exp);
2916 break;
2917 case O_logical_and:
2918 print_binary (file, "logical_and", exp);
2919 break;
2920 case O_logical_or:
2921 print_binary (file, "logical_or", exp);
2922 break;
2923 case O_add:
2924 indent_level++;
2925 fprintf (file, "add\n%*s<", indent_level * 4, "");
2926 print_symbol_value_1 (file, exp->X_add_symbol);
2927 fprintf (file, ">\n%*s<", indent_level * 4, "");
2928 print_symbol_value_1 (file, exp->X_op_symbol);
2929 fprintf (file, ">");
2930 goto maybe_print_addnum;
2931 case O_subtract:
2932 indent_level++;
2933 fprintf (file, "subtract\n%*s<", indent_level * 4, "");
2934 print_symbol_value_1 (file, exp->X_add_symbol);
2935 fprintf (file, ">\n%*s<", indent_level * 4, "");
2936 print_symbol_value_1 (file, exp->X_op_symbol);
2937 fprintf (file, ">");
2938 goto maybe_print_addnum;
2939 default:
2940 fprintf (file, "{unknown opcode %d}", (int) exp->X_op);
2941 break;
2942 }
2943 fflush (stdout);
2944}
2945
2946void
74937d39 2947print_expr (expressionS *exp)
252b5132
RH		 2948{
2949 print_expr_1 (stderr, exp);
2950 fprintf (stderr, "\n");
2951}
2952
2953void
74937d39 2954symbol_print_statistics (FILE *file)
252b5132
RH		 2955{
2956 hash_print_statistics (file, "symbol table", sy_hash);
49309057
ILT		 2957 hash_print_statistics (file, "mini local symbol table", local_hash);
2958 fprintf (file, "%lu mini local symbols created, %lu converted\n",
2959 local_symbol_count, local_symbol_conversion_count);
252b5132 2960}
280d71bf
DB		 2961
2962#ifdef OBJ_COMPLEX_RELC
2963
2964/* Convert given symbol to a new complex-relocation symbol name. This
6f12865c 2965 may be a recursive function, since it might be called for non-leaf
280d71bf 2966 nodes (plain symbols) in the expression tree. The caller owns the
6f12865c
AM		 2967 returning string, so should free it eventually. Errors are
2968 indicated via as_bad and a NULL return value. The given symbol
280d71bf
DB		 2969 is marked with sy_used_in_reloc. */
2970
2971char *
2972symbol_relc_make_sym (symbolS * sym)
2973{
2974 char * terminal = NULL;
2975 const char * sname;
2976 char typetag;
2977 int sname_len;
2978
2979 assert (sym != NULL);
2980
2981 /* Recurse to symbol_relc_make_expr if this symbol
2982 is defined as an expression or a plain value. */
2983 if ( S_GET_SEGMENT (sym) == expr_section
2984 || S_GET_SEGMENT (sym) == absolute_section)
2985 return symbol_relc_make_expr (& sym->sy_value);
2986
2987 /* This may be a "fake symbol" L0\001, referring to ".".
2988 Write out a special null symbol to refer to this position. */
2989 if (! strcmp (S_GET_NAME (sym), FAKE_LABEL_NAME))
2990 return xstrdup (".");
2991
2992 /* We hope this is a plain leaf symbol. Construct the encoding
2993 as {S,s}II...:CCCCCCC....
2994 where 'S'/'s' means section symbol / plain symbol
2995 III is decimal for the symbol name length
2996 CCC is the symbol name itself. */
2997 symbol_mark_used_in_reloc (sym);
2998
2999 sname = S_GET_NAME (sym);
3000 sname_len = strlen (sname);
3001 typetag = symbol_section_p (sym) ? 'S' : 's';
3002
3003 terminal = xmalloc (1 /* S or s */
3004 + 8 /* sname_len in decimal */
3005 + 1 /* _ spacer */
3006 + sname_len /* name itself */
3007 + 1 /* \0 */ );
3008
3009 sprintf (terminal, "%c%d:%s", typetag, sname_len, sname);
3010 return terminal;
3011}
3012
3013/* Convert given value to a new complex-relocation symbol name. This
3014 is a non-recursive function, since it is be called for leaf nodes
3015 (plain values) in the expression tree. The caller owns the
3016 returning string, so should free() it eventually. No errors. */
3017
3018char *
3019symbol_relc_make_value (offsetT val)
3020{
3021 char * terminal = xmalloc (28); /* Enough for long long. */
3022
3023 terminal[0] = '#';
1a412f5f 3024 bfd_sprintf_vma (stdoutput, terminal + 1, val);
280d71bf
DB		 3025 return terminal;
3026}
3027
3028/* Convert given expression to a new complex-relocation symbol name.
3029 This is a recursive function, since it traverses the entire given
3030 expression tree. The caller owns the returning string, so should
3031 free() it eventually. Errors are indicated via as_bad() and a NULL
3032 return value. */
3033
3034char *
3035symbol_relc_make_expr (expressionS * exp)
3036{
3037 char * opstr = NULL; /* Operator prefix string. */
3038 int arity = 0; /* Arity of this operator. */
3039 char * operands[3]; /* Up to three operands. */
3040 char * concat_string = NULL;
3041
3042 operands[0] = operands[1] = operands[2] = NULL;
3043
3044 assert (exp != NULL);
3045
3046 /* Match known operators -> fill in opstr, arity, operands[] and fall
3047 through to construct subexpression fragments; may instead return
3048 string directly for leaf nodes. */
3049
3050 /* See expr.h for the meaning of all these enums. Many operators
3051 have an unnatural arity (X_add_number implicitly added). The
3052 conversion logic expands them to explicit "+" subexpressions. */
3053
3054 switch (exp->X_op)
3055 {
3056 default:
3057 as_bad ("Unknown expression operator (enum %d)", exp->X_op);
3058 break;
3059
3060 /* Leaf nodes. */
3061 case O_constant:
3062 return symbol_relc_make_value (exp->X_add_number);
3063
3064 case O_symbol:
3065 if (exp->X_add_number)
3066 {
3067 arity = 2;
3068 opstr = "+";
3069 operands[0] = symbol_relc_make_sym (exp->X_add_symbol);
3070 operands[1] = symbol_relc_make_value (exp->X_add_number);
3071 break;
3072 }
3073 else
3074 return symbol_relc_make_sym (exp->X_add_symbol);
3075
3076 /* Helper macros for nesting nodes. */
3077
3078#define HANDLE_XADD_OPT1(str_) \
3079 if (exp->X_add_number) \
3080 { \
3081 arity = 2; \
3082 opstr = "+:" str_; \
3083 operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \
3084 operands[1] = symbol_relc_make_value (exp->X_add_number); \
3085 break; \
3086 } \
3087 else \
3088 { \
3089 arity = 1; \
3090 opstr = str_; \
3091 operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \
3092 } \
3093 break
3094
3095#define HANDLE_XADD_OPT2(str_) \
3096 if (exp->X_add_number) \
3097 { \
3098 arity = 3; \
3099 opstr = "+:" str_; \
3100 operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \
3101 operands[1] = symbol_relc_make_sym (exp->X_op_symbol); \
3102 operands[2] = symbol_relc_make_value (exp->X_add_number); \
3103 } \
3104 else \
3105 { \
3106 arity = 2; \
3107 opstr = str_; \
3108 operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \
3109 operands[1] = symbol_relc_make_sym (exp->X_op_symbol); \
3110 } \
3111 break
3112
3113 /* Nesting nodes. */
3114
3115 case O_uminus: HANDLE_XADD_OPT1 ("0-");
3116 case O_bit_not: HANDLE_XADD_OPT1 ("~");
3117 case O_logical_not: HANDLE_XADD_OPT1 ("!");
3118 case O_multiply: HANDLE_XADD_OPT2 ("*");
3119 case O_divide: HANDLE_XADD_OPT2 ("/");
3120 case O_modulus: HANDLE_XADD_OPT2 ("%");
3121 case O_left_shift: HANDLE_XADD_OPT2 ("<<");
3122 case O_right_shift: HANDLE_XADD_OPT2 (">>");
3123 case O_bit_inclusive_or: HANDLE_XADD_OPT2 ("|");
3124 case O_bit_exclusive_or: HANDLE_XADD_OPT2 ("^");
3125 case O_bit_and: HANDLE_XADD_OPT2 ("&");
3126 case O_add: HANDLE_XADD_OPT2 ("+");
3127 case O_subtract: HANDLE_XADD_OPT2 ("-");
3128 case O_eq: HANDLE_XADD_OPT2 ("==");
3129 case O_ne: HANDLE_XADD_OPT2 ("!=");
3130 case O_lt: HANDLE_XADD_OPT2 ("<");
3131 case O_le: HANDLE_XADD_OPT2 ("<=");
3132 case O_ge: HANDLE_XADD_OPT2 (">=");
3133 case O_gt: HANDLE_XADD_OPT2 (">");
3134 case O_logical_and: HANDLE_XADD_OPT2 ("&&");
3135 case O_logical_or: HANDLE_XADD_OPT2 ("||");
3136 }
3137
3138 /* Validate & reject early. */
3139 if (arity >= 1 && ((operands[0] == NULL) || (strlen (operands[0]) == 0)))
3140 opstr = NULL;
3141 if (arity >= 2 && ((operands[1] == NULL) || (strlen (operands[1]) == 0)))
3142 opstr = NULL;
3143 if (arity >= 3 && ((operands[2] == NULL) || (strlen (operands[2]) == 0)))
3144 opstr = NULL;
3145
3146 if (opstr == NULL)
3147 concat_string = NULL;
3148 else
3149 {
3150 /* Allocate new string; include inter-operand padding gaps etc. */
3151 concat_string = xmalloc (strlen (opstr)
3152 + 1
3153 + (arity >= 1 ? (strlen (operands[0]) + 1 ) : 0)
3154 + (arity >= 2 ? (strlen (operands[1]) + 1 ) : 0)
3155 + (arity >= 3 ? (strlen (operands[2]) + 0 ) : 0)
3156 + 1);
3157 assert (concat_string != NULL);
3158
3159 /* Format the thing. */
3160 sprintf (concat_string,
3161 (arity == 0 ? "%s" :
3162 arity == 1 ? "%s:%s" :
3163 arity == 2 ? "%s:%s:%s" :
3164 /* arity == 3 */ "%s:%s:%s:%s"),
3165 opstr, operands[0], operands[1], operands[2]);
3166 }
3167
3168 /* Free operand strings (not opstr). */
3169 if (arity >= 1) xfree (operands[0]);
3170 if (arity >= 2) xfree (operands[1]);
3171 if (arity >= 3) xfree (operands[2]);
3172
3173 return concat_string;
3174}
3175
3176#endif
GDB Binutils - Deliverables
This page took 0.642063 seconds and 4 git commands to generate.