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Fix a typo.
[deliverable/binutils-gdb.git] / gas / symbols.c
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252b5132 1/* symbols.c -symbol table-
f7e42eb4 2 Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
0af1713e 3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
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
78aff5a5 140 symbolP = obstack_alloc (&notes, sizeof (symbolS));
252b5132 141
7c743825 142 /* symbol must be born in some fixed state. This seems as good as any. */
252b5132
RH		 143 memset (symbolP, 0, sizeof (symbolS));
144
252b5132
RH		 145 symbolP->bsym = bfd_make_empty_symbol (stdoutput);
146 if (symbolP->bsym == NULL)
885afe7b 147 as_fatal ("bfd_make_empty_symbol: %s", bfd_errmsg (bfd_get_error ()));
252b5132
RH		 148 S_SET_NAME (symbolP, preserved_copy_of_name);
149
150 S_SET_SEGMENT (symbolP, segment);
151 S_SET_VALUE (symbolP, valu);
152 symbol_clear_list_pointers (symbolP);
153
154 symbolP->sy_frag = frag;
252b5132
RH		 155
156 obj_symbol_new_hook (symbolP);
157
158#ifdef tc_symbol_new_hook
159 tc_symbol_new_hook (symbolP);
160#endif
161
162 return symbolP;
163}
164\f
49309057
ILT		 165
166/* Local symbol support. If we can get away with it, we keep only a
167 small amount of information for local symbols. */
168
74937d39 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
78aff5a5 200 ret = obstack_alloc (&notes, sizeof *ret);
49309057
ILT		 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 206
5a49b8ac 207 hash_jam (local_hash, name_copy, (void *) ret);
49309057
ILT		 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),
5a49b8ac 492 (void *) symbolP);
49309057 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
5a49b8ac 499 if ((error_string = hash_jam (sy_hash, S_GET_NAME (symbolP), (void *) symbolP)))
252b5132 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;
73e24c68
AM		 599
600 /* Symbols that won't be output can't be external. */
601 S_CLEAR_EXTERNAL (orgsymP);
bdf128d6 602 orgsymP->sy_previous = orgsymP->sy_next = orgsymP;
9497f5ac
NC		 603 debug_verify_symchain (symbol_rootP, symbol_lastP);
604
605 symbol_table_insert (newsymP);
606 }
bdf128d6 607 else
73e24c68
AM		 608 {
609 /* Symbols that won't be output can't be external. */
610 S_CLEAR_EXTERNAL (newsymP);
611 newsymP->sy_previous = newsymP->sy_next = newsymP;
612 }
9497f5ac
NC		 613
614 return newsymP;
615}
616
617/* Referenced symbols, if they are forward references, need to be cloned
618 (without replacing the original) so that the value of the referenced
619 symbols at the point of use . */
620
621#undef symbol_clone_if_forward_ref
622symbolS *
623symbol_clone_if_forward_ref (symbolS *symbolP, int is_forward)
624{
625 if (symbolP && !LOCAL_SYMBOL_CHECK (symbolP))
626 {
627 symbolS *add_symbol = symbolP->sy_value.X_add_symbol;
628 symbolS *op_symbol = symbolP->sy_value.X_op_symbol;
629
630 if (symbolP->sy_forward_ref)
631 is_forward = 1;
632
633 if (is_forward)
634 {
635 /* assign_symbol() clones volatile symbols; pre-existing expressions
636 hold references to the original instance, but want the current
637 value. Just repeat the lookup. */
638 if (add_symbol && S_IS_VOLATILE (add_symbol))
639 add_symbol = symbol_find_exact (S_GET_NAME (add_symbol));
640 if (op_symbol && S_IS_VOLATILE (op_symbol))
641 op_symbol = symbol_find_exact (S_GET_NAME (op_symbol));
642 }
643
644 /* Re-using sy_resolving here, as this routine cannot get called from
645 symbol resolution code. */
646 if (symbolP->bsym->section == expr_section && !symbolP->sy_resolving)
647 {
648 symbolP->sy_resolving = 1;
649 add_symbol = symbol_clone_if_forward_ref (add_symbol, is_forward);
650 op_symbol = symbol_clone_if_forward_ref (op_symbol, is_forward);
651 symbolP->sy_resolving = 0;
652 }
653
654 if (symbolP->sy_forward_ref
655 || add_symbol != symbolP->sy_value.X_add_symbol
656 || op_symbol != symbolP->sy_value.X_op_symbol)
657 symbolP = symbol_clone (symbolP, 0);
658
659 symbolP->sy_value.X_add_symbol = add_symbol;
660 symbolP->sy_value.X_op_symbol = op_symbol;
661 }
662
663 return symbolP;
664}
665
b7d6ed97 666symbolS *
74937d39 667symbol_temp_new (segT seg, valueT ofs, fragS *frag)
b7d6ed97 668{
756d1d01 669 return symbol_new (FAKE_LABEL_NAME, seg, ofs, frag);
b7d6ed97
RH		 670}
671
672symbolS *
74937d39 673symbol_temp_new_now (void)
b7d6ed97
RH		 674{
675 return symbol_temp_new (now_seg, frag_now_fix (), frag_now);
676}
677
678symbolS *
74937d39 679symbol_temp_make (void)
b7d6ed97 680{
756d1d01 681 return symbol_make (FAKE_LABEL_NAME);
b7d6ed97
RH		 682}
683
7c743825
KH		 684/* Implement symbol table lookup.
685 In: A symbol's name as a string: '\0' can't be part of a symbol name.
686 Out: NULL if the name was not in the symbol table, else the address
687 of a struct symbol associated with that name. */
252b5132 688
9758f3fc 689symbolS *
74937d39 690symbol_find_exact (const char *name)
06e77878
AO		 691{
692 return symbol_find_exact_noref (name, 0);
693}
694
695symbolS *
696symbol_find_exact_noref (const char *name, int noref)
9758f3fc 697{
7be1c489 698 struct local_symbol *locsym;
06e77878 699 symbolS* sym;
9758f3fc 700
7be1c489
AM		 701 locsym = (struct local_symbol *) hash_find (local_hash, name);
702 if (locsym != NULL)
703 return (symbolS *) locsym;
9758f3fc 704
06e77878
AO		 705 sym = ((symbolS *) hash_find (sy_hash, name));
706
707 /* Any references to the symbol, except for the reference in
708 .weakref, must clear this flag, such that the symbol does not
709 turn into a weak symbol. Note that we don't have to handle the
710 local_symbol case, since a weakrefd is always promoted out of the
711 local_symbol table when it is turned into a weak symbol. */
712 if (sym && ! noref)
713 S_CLEAR_WEAKREFD (sym);
714
715 return sym;
9758f3fc
AM		 716}
717
252b5132 718symbolS *
91c4c449 719symbol_find (const char *name)
06e77878
AO		 720{
721 return symbol_find_noref (name, 0);
722}
723
724symbolS *
725symbol_find_noref (const char *name, int noref)
252b5132 726{
252b5132
RH		 727#ifdef tc_canonicalize_symbol_name
728 {
729 char *copy;
03987ced 730 size_t len = strlen (name) + 1;
252b5132 731
03987ced
RH		 732 copy = (char *) alloca (len);
733 memcpy (copy, name, len);
252b5132
RH		 734 name = tc_canonicalize_symbol_name (copy);
735 }
736#endif
737
738 if (! symbols_case_sensitive)
739 {
03987ced
RH		 740 char *copy;
741 const char *orig;
742 unsigned char c;
743
744 orig = name;
745 name = copy = (char *) alloca (strlen (name) + 1);
746
747 while ((c = *orig++) != '\0')
748 {
3882b010 749 *copy++ = TOUPPER (c);
03987ced
RH		 750 }
751 *copy = '\0';
252b5132
RH		 752 }
753
06e77878 754 return symbol_find_exact_noref (name, noref);
252b5132
RH		 755}
756
7c743825
KH		 757/* Once upon a time, symbols were kept in a singly linked list. At
758 least coff needs to be able to rearrange them from time to time, for
759 which a doubly linked list is much more convenient. Loic did these
760 as macros which seemed dangerous to me so they're now functions.
761 xoxorich. */
762
763/* Link symbol ADDME after symbol TARGET in the chain. */
252b5132 764
7c743825 765void
74937d39
KH		 766symbol_append (symbolS *addme, symbolS *target,
767 symbolS **rootPP, symbolS **lastPP)
252b5132 768{
49309057
ILT		 769 if (LOCAL_SYMBOL_CHECK (addme))
770 abort ();
771 if (target != NULL && LOCAL_SYMBOL_CHECK (target))
772 abort ();
773
252b5132
RH		 774 if (target == NULL)
775 {
776 know (*rootPP == NULL);
777 know (*lastPP == NULL);
778 addme->sy_next = NULL;
252b5132 779 addme->sy_previous = NULL;
252b5132
RH		 780 *rootPP = addme;
781 *lastPP = addme;
782 return;
7c743825 783 } /* if the list is empty */
252b5132
RH		 784
785 if (target->sy_next != NULL)
786 {
252b5132 787 target->sy_next->sy_previous = addme;
252b5132
RH		 788 }
789 else
790 {
791 know (*lastPP == target);
792 *lastPP = addme;
7c743825 793 } /* if we have a next */
252b5132
RH		 794
795 addme->sy_next = target->sy_next;
796 target->sy_next = addme;
252b5132 797 addme->sy_previous = target;
252b5132
RH		 798
799 debug_verify_symchain (symbol_rootP, symbol_lastP);
800}
801
7c743825
KH		 802/* Set the chain pointers of SYMBOL to null. */
803
804void
74937d39 805symbol_clear_list_pointers (symbolS *symbolP)
252b5132 806{
49309057
ILT		 807 if (LOCAL_SYMBOL_CHECK (symbolP))
808 abort ();
252b5132 809 symbolP->sy_next = NULL;
252b5132 810 symbolP->sy_previous = NULL;
252b5132
RH		 811}
812
7c743825
KH		 813/* Remove SYMBOLP from the list. */
814
815void
74937d39 816symbol_remove (symbolS *symbolP, symbolS **rootPP, symbolS **lastPP)
252b5132 817{
49309057
ILT		 818 if (LOCAL_SYMBOL_CHECK (symbolP))
819 abort ();
820
252b5132
RH		 821 if (symbolP == *rootPP)
822 {
823 *rootPP = symbolP->sy_next;
7c743825 824 } /* if it was the root */
252b5132
RH		 825
826 if (symbolP == *lastPP)
827 {
828 *lastPP = symbolP->sy_previous;
7c743825 829 } /* if it was the tail */
252b5132
RH		 830
831 if (symbolP->sy_next != NULL)
832 {
833 symbolP->sy_next->sy_previous = symbolP->sy_previous;
7c743825 834 } /* if not last */
252b5132
RH		 835
836 if (symbolP->sy_previous != NULL)
837 {
838 symbolP->sy_previous->sy_next = symbolP->sy_next;
7c743825 839 } /* if not first */
252b5132
RH		 840
841 debug_verify_symchain (*rootPP, *lastPP);
842}
843
7c743825
KH		 844/* Link symbol ADDME before symbol TARGET in the chain. */
845
846void
74937d39
KH		 847symbol_insert (symbolS *addme, symbolS *target,
848 symbolS **rootPP, symbolS **lastPP ATTRIBUTE_UNUSED)
252b5132 849{
49309057
ILT		 850 if (LOCAL_SYMBOL_CHECK (addme))
851 abort ();
852 if (LOCAL_SYMBOL_CHECK (target))
853 abort ();
854
252b5132
RH		 855 if (target->sy_previous != NULL)
856 {
857 target->sy_previous->sy_next = addme;
858 }
859 else
860 {
861 know (*rootPP == target);
862 *rootPP = addme;
7c743825 863 } /* if not first */
252b5132
RH		 864
865 addme->sy_previous = target->sy_previous;
866 target->sy_previous = addme;
867 addme->sy_next = target;
868
869 debug_verify_symchain (*rootPP, *lastPP);
870}
871
7c743825 872void
74937d39 873verify_symbol_chain (symbolS *rootP, symbolS *lastP)
252b5132
RH		 874{
875 symbolS *symbolP = rootP;
876
877 if (symbolP == NULL)
878 return;
879
880 for (; symbol_next (symbolP) != NULL; symbolP = symbol_next (symbolP))
881 {
49309057 882 assert (symbolP->bsym != NULL);
252b5132 883 assert (symbolP->sy_next->sy_previous == symbolP);
252b5132
RH		 884 }
885
886 assert (lastP == symbolP);
887}
888
280d71bf
DB		 889#ifdef OBJ_COMPLEX_RELC
890
891static int
892use_complex_relocs_for (symbolS * symp)
893{
894 switch (symp->sy_value.X_op)
895 {
896 case O_constant:
897 return 0;
898
899 case O_symbol:
900 case O_symbol_rva:
901 case O_uminus:
902 case O_bit_not:
903 case O_logical_not:
904 if ( (S_IS_COMMON (symp->sy_value.X_add_symbol)
905 || S_IS_LOCAL (symp->sy_value.X_add_symbol))
906 &&
907 (S_IS_DEFINED (symp->sy_value.X_add_symbol)
908 && S_GET_SEGMENT (symp->sy_value.X_add_symbol) != expr_section))
909 return 0;
910 break;
911
912 case O_multiply:
913 case O_divide:
914 case O_modulus:
915 case O_left_shift:
916 case O_right_shift:
917 case O_bit_inclusive_or:
918 case O_bit_or_not:
919 case O_bit_exclusive_or:
920 case O_bit_and:
921 case O_add:
922 case O_subtract:
923 case O_eq:
924 case O_ne:
925 case O_lt:
926 case O_le:
927 case O_ge:
928 case O_gt:
929 case O_logical_and:
930 case O_logical_or:
931
932 if ( (S_IS_COMMON (symp->sy_value.X_add_symbol)
933 || S_IS_LOCAL (symp->sy_value.X_add_symbol))
934 &&
935 (S_IS_COMMON (symp->sy_value.X_op_symbol)
936 || S_IS_LOCAL (symp->sy_value.X_op_symbol))
937
938 && S_IS_DEFINED (symp->sy_value.X_add_symbol)
939 && S_IS_DEFINED (symp->sy_value.X_op_symbol)
940 && S_GET_SEGMENT (symp->sy_value.X_add_symbol) != expr_section
941 && S_GET_SEGMENT (symp->sy_value.X_op_symbol) != expr_section)
942 return 0;
943 break;
944
945 default:
946 break;
947 }
948 return 1;
949}
950#endif
951
0909233e 952static void
74937d39 953report_op_error (symbolS *symp, symbolS *left, symbolS *right)
0909233e
AM		 954{
955 char *file;
956 unsigned int line;
957 segT seg_left = S_GET_SEGMENT (left);
958 segT seg_right = right ? S_GET_SEGMENT (right) : 0;
1d3b2b27 959
0909233e
AM		 960 if (expr_symbol_where (symp, &file, &line))
961 {
962 if (seg_left == undefined_section)
963 as_bad_where (file, line,
964 _("undefined symbol `%s' in operation"),
965 S_GET_NAME (left));
966 if (seg_right == undefined_section)
967 as_bad_where (file, line,
968 _("undefined symbol `%s' in operation"),
969 S_GET_NAME (right));
970 if (seg_left != undefined_section
971 && seg_right != undefined_section)
972 {
973 if (right)
974 as_bad_where (file, line,
975 _("invalid sections for operation on `%s' and `%s'"),
976 S_GET_NAME (left), S_GET_NAME (right));
977 else
978 as_bad_where (file, line,
979 _("invalid section for operation on `%s'"),
980 S_GET_NAME (left));
981 }
1d3b2b27 982
0909233e
AM		 983 }
984 else
985 {
986 if (seg_left == undefined_section)
987 as_bad (_("undefined symbol `%s' in operation setting `%s'"),
988 S_GET_NAME (left), S_GET_NAME (symp));
989 if (seg_right == undefined_section)
990 as_bad (_("undefined symbol `%s' in operation setting `%s'"),
991 S_GET_NAME (right), S_GET_NAME (symp));
992 if (seg_left != undefined_section
993 && seg_right != undefined_section)
994 {
995 if (right)
d9e05e4e
AM		 996 as_bad (_("invalid sections for operation on `%s' and `%s' setting `%s'"),
997 S_GET_NAME (left), S_GET_NAME (right), S_GET_NAME (symp));
0909233e 998 else
d9e05e4e
AM		 999 as_bad (_("invalid section for operation on `%s' setting `%s'"),
1000 S_GET_NAME (left), S_GET_NAME (symp));
0909233e
AM		 1001 }
1002 }
1003}
1004
252b5132
RH		 1005/* Resolve the value of a symbol. This is called during the final
1006 pass over the symbol table to resolve any symbols with complex
1007 values. */
1008
1009valueT
74937d39 1010resolve_symbol_value (symbolS *symp)
252b5132
RH		 1011{
1012 int resolved;
03e83a45 1013 valueT final_val = 0;
252b5132
RH		 1014 segT final_seg;
1015
49309057
ILT		 1016 if (LOCAL_SYMBOL_CHECK (symp))
1017 {
1018 struct local_symbol *locsym = (struct local_symbol *) symp;
1019
bd780143 1020 final_val = locsym->lsy_value;
49309057 1021 if (local_symbol_resolved_p (locsym))
bd780143 1022 return final_val;
49309057 1023
bd780143 1024 final_val += local_symbol_get_frag (locsym)->fr_address / OCTETS_PER_BYTE;
49309057 1025
6386f3a7 1026 if (finalize_syms)
49309057 1027 {
bd780143 1028 locsym->lsy_value = final_val;
49309057
ILT		 1029 local_symbol_mark_resolved (locsym);
1030 }
1031
1032 return final_val;
1033 }
1034
252b5132
RH		 1035 if (symp->sy_resolved)
1036 {
1037 if (symp->sy_value.X_op == O_constant)
1038 return (valueT) symp->sy_value.X_add_number;
1039 else
1040 return 0;
1041 }
1042
1043 resolved = 0;
1044 final_seg = S_GET_SEGMENT (symp);
1045
1046 if (symp->sy_resolving)
1047 {
6386f3a7 1048 if (finalize_syms)
0e389e77 1049 as_bad (_("symbol definition loop encountered at `%s'"),
7c743825 1050 S_GET_NAME (symp));
252b5132
RH		 1051 final_val = 0;
1052 resolved = 1;
1053 }
280d71bf
DB		 1054#ifdef OBJ_COMPLEX_RELC
1055 else if (final_seg == expr_section
1056 && use_complex_relocs_for (symp))
1057 {
1058 symbolS * relc_symbol = NULL;
1059 char * relc_symbol_name = NULL;
1060
1061 relc_symbol_name = symbol_relc_make_expr (& symp->sy_value);
1062
1063 /* For debugging, print out conversion input & output. */
1064#ifdef DEBUG_SYMS
1065 print_expr (& symp->sy_value);
1066 if (relc_symbol_name)
1067 fprintf (stderr, "-> relc symbol: %s\n", relc_symbol_name);
1068#endif
1069
1070 if (relc_symbol_name != NULL)
1071 relc_symbol = symbol_new (relc_symbol_name, undefined_section,
1072 0, & zero_address_frag);
1073
1074 if (relc_symbol == NULL)
1075 {
1076 as_bad (_("cannot convert expression symbol %s to complex relocation"),
1077 S_GET_NAME (symp));
1078 resolved = 0;
1079 }
1080 else
1081 {
1082 symbol_table_insert (relc_symbol);
1083
1084 /* S_CLEAR_EXTERNAL (relc_symbol); */
1085 if (symp->bsym->flags & BSF_SRELC)
1086 relc_symbol->bsym->flags |= BSF_SRELC;
1087 else
1088 relc_symbol->bsym->flags |= BSF_RELC;
1089 /* symp->bsym->flags |= BSF_RELC; */
1090 copy_symbol_attributes (symp, relc_symbol);
1091 symp->sy_value.X_op = O_symbol;
1092 symp->sy_value.X_add_symbol = relc_symbol;
1093 symp->sy_value.X_add_number = 0;
1094 resolved = 1;
1095 }
1096
1097 final_seg = undefined_section;
1098 goto exit_dont_set_value;
1099 }
1100#endif
252b5132
RH		 1101 else
1102 {
1103 symbolS *add_symbol, *op_symbol;
1104 offsetT left, right;
1105 segT seg_left, seg_right;
1106 operatorT op;
2d034539 1107 int move_seg_ok;
252b5132
RH		 1108
1109 symp->sy_resolving = 1;
1110
1111 /* Help out with CSE. */
1112 add_symbol = symp->sy_value.X_add_symbol;
1113 op_symbol = symp->sy_value.X_op_symbol;
1114 final_val = symp->sy_value.X_add_number;
1115 op = symp->sy_value.X_op;
1116
1117 switch (op)
1118 {
1119 default:
1120 BAD_CASE (op);
1121 break;
1122
1123 case O_absent:
1124 final_val = 0;
1125 /* Fall through. */
1126
1127 case O_constant:
bea9907b 1128 final_val += symp->sy_frag->fr_address / OCTETS_PER_BYTE;
252b5132
RH		 1129 if (final_seg == expr_section)
1130 final_seg = absolute_section;
db557034
AM		 1131 /* Fall through. */
1132
1133 case O_register:
252b5132
RH		 1134 resolved = 1;
1135 break;
1136
1137 case O_symbol:
1138 case O_symbol_rva:
6386f3a7 1139 left = resolve_symbol_value (add_symbol);
e0890092
AM		 1140 seg_left = S_GET_SEGMENT (add_symbol);
1141 if (finalize_syms)
1142 symp->sy_value.X_op_symbol = NULL;
252b5132 1143
e0890092 1144 do_symbol:
06e77878
AO		 1145 if (S_IS_WEAKREFR (symp))
1146 {
1147 assert (final_val == 0);
1148 if (S_IS_WEAKREFR (add_symbol))
1149 {
1150 assert (add_symbol->sy_value.X_op == O_symbol
1151 && add_symbol->sy_value.X_add_number == 0);
1152 add_symbol = add_symbol->sy_value.X_add_symbol;
1153 assert (! S_IS_WEAKREFR (add_symbol));
1154 symp->sy_value.X_add_symbol = add_symbol;
1155 }
1156 }
1157
252b5132
RH		 1158 if (symp->sy_mri_common)
1159 {
1160 /* This is a symbol inside an MRI common section. The
e0890092
AM		 1161 relocation routines are going to handle it specially.
1162 Don't change the value. */
49309057 1163 resolved = symbol_resolved_p (add_symbol);
252b5132
RH		 1164 break;
1165 }
1166
6386f3a7 1167 if (finalize_syms && final_val == 0)
49309057
ILT		 1168 {
1169 if (LOCAL_SYMBOL_CHECK (add_symbol))
1170 add_symbol = local_symbol_convert ((struct local_symbol *)
1171 add_symbol);
1172 copy_symbol_attributes (symp, add_symbol);
1173 }
252b5132 1174
e0890092
AM		 1175 /* If we have equated this symbol to an undefined or common
1176 symbol, keep X_op set to O_symbol, and don't change
1177 X_add_number. This permits the routine which writes out
1178 relocation to detect this case, and convert the
1179 relocation to be against the symbol to which this symbol
1180 is equated. */
977cdf5a 1181 if (! S_IS_DEFINED (add_symbol)
7be1c489 1182#if defined (OBJ_COFF) && defined (TE_PE)
977cdf5a
NC		 1183 || S_IS_WEAK (add_symbol)
1184#endif
1185 || S_IS_COMMON (add_symbol))
252b5132 1186 {
6386f3a7 1187 if (finalize_syms)
252b5132 1188 {
252b5132
RH		 1189 symp->sy_value.X_op = O_symbol;
1190 symp->sy_value.X_add_symbol = add_symbol;
1191 symp->sy_value.X_add_number = final_val;
e0890092
AM		 1192 /* Use X_op_symbol as a flag. */
1193 symp->sy_value.X_op_symbol = add_symbol;
1194 final_seg = seg_left;
252b5132
RH		 1195 }
1196 final_val = 0;
49309057 1197 resolved = symbol_resolved_p (add_symbol);
c89c8534 1198 symp->sy_resolving = 0;
252b5132
RH		 1199 goto exit_dont_set_value;
1200 }
0023dd27
AM		 1201 else if (finalize_syms
1202 && ((final_seg == expr_section && seg_left != expr_section)
1203 || symbol_shadow_p (symp)))
e0890092
AM		 1204 {
1205 /* If the symbol is an expression symbol, do similarly
1206 as for undefined and common syms above. Handles
1207 "sym +/- expr" where "expr" cannot be evaluated
1208 immediately, and we want relocations to be against
1209 "sym", eg. because it is weak. */
1210 symp->sy_value.X_op = O_symbol;
1211 symp->sy_value.X_add_symbol = add_symbol;
1212 symp->sy_value.X_add_number = final_val;
1213 symp->sy_value.X_op_symbol = add_symbol;
1214 final_seg = seg_left;
1215 final_val += symp->sy_frag->fr_address + left;
1216 resolved = symbol_resolved_p (add_symbol);
1217 symp->sy_resolving = 0;
1218 goto exit_dont_set_value;
1219 }
252b5132
RH		 1220 else
1221 {
1222 final_val += symp->sy_frag->fr_address + left;
1223 if (final_seg == expr_section || final_seg == undefined_section)
e0890092 1224 final_seg = seg_left;
252b5132
RH		 1225 }
1226
49309057 1227 resolved = symbol_resolved_p (add_symbol);
06e77878
AO		 1228 if (S_IS_WEAKREFR (symp))
1229 goto exit_dont_set_value;
252b5132
RH		 1230 break;
1231
1232 case O_uminus:
1233 case O_bit_not:
1234 case O_logical_not:
6386f3a7 1235 left = resolve_symbol_value (add_symbol);
784b640d 1236 seg_left = S_GET_SEGMENT (add_symbol);
252b5132 1237
0909233e
AM		 1238 /* By reducing these to the relevant dyadic operator, we get
1239 !S -> S == 0 permitted on anything,
1240 -S -> 0 - S only permitted on absolute
1241 ~S -> S ^ ~0 only permitted on absolute */
1242 if (op != O_logical_not && seg_left != absolute_section
1243 && finalize_syms)
1244 report_op_error (symp, add_symbol, NULL);
1d3b2b27 1245
0909233e
AM		 1246 if (final_seg == expr_section || final_seg == undefined_section)
1247 final_seg = absolute_section;
1d3b2b27 1248
252b5132
RH		 1249 if (op == O_uminus)
1250 left = -left;
1251 else if (op == O_logical_not)
1252 left = !left;
1253 else
1254 left = ~left;
1255
1256 final_val += left + symp->sy_frag->fr_address;
252b5132 1257
49309057 1258 resolved = symbol_resolved_p (add_symbol);
252b5132
RH		 1259 break;
1260
1261 case O_multiply:
1262 case O_divide:
1263 case O_modulus:
1264 case O_left_shift:
1265 case O_right_shift:
1266 case O_bit_inclusive_or:
1267 case O_bit_or_not:
1268 case O_bit_exclusive_or:
1269 case O_bit_and:
1270 case O_add:
1271 case O_subtract:
1272 case O_eq:
1273 case O_ne:
1274 case O_lt:
1275 case O_le:
1276 case O_ge:
1277 case O_gt:
1278 case O_logical_and:
1279 case O_logical_or:
6386f3a7
AM		 1280 left = resolve_symbol_value (add_symbol);
1281 right = resolve_symbol_value (op_symbol);
252b5132
RH		 1282 seg_left = S_GET_SEGMENT (add_symbol);
1283 seg_right = S_GET_SEGMENT (op_symbol);
1284
1285 /* Simplify addition or subtraction of a constant by folding the
1286 constant into X_add_number. */
e0890092 1287 if (op == O_add)
252b5132
RH		 1288 {
1289 if (seg_right == absolute_section)
1290 {
e0890092 1291 final_val += right;
252b5132
RH		 1292 goto do_symbol;
1293 }
e0890092 1294 else if (seg_left == absolute_section)
252b5132 1295 {
252b5132
RH		 1296 final_val += left;
1297 add_symbol = op_symbol;
1298 left = right;
e0890092
AM		 1299 seg_left = seg_right;
1300 goto do_symbol;
1301 }
1302 }
1303 else if (op == O_subtract)
1304 {
1305 if (seg_right == absolute_section)
1306 {
1307 final_val -= right;
252b5132
RH		 1308 goto do_symbol;
1309 }
1310 }
1311
2d034539 1312 move_seg_ok = 1;
e0890092
AM		 1313 /* Equality and non-equality tests are permitted on anything.
1314 Subtraction, and other comparison operators are permitted if
1315 both operands are in the same section. Otherwise, both
1316 operands must be absolute. We already handled the case of
1317 addition or subtraction of a constant above. This will
1318 probably need to be changed for an object file format which
2d034539
NC		 1319 supports arbitrary expressions, such as IEEE-695. */
1320 if (!(seg_left == absolute_section
0909233e
AM		 1321 && seg_right == absolute_section)
1322 && !(op == O_eq || op == O_ne)
1323 && !((op == O_subtract
1324 || op == O_lt || op == O_le || op == O_ge || op == O_gt)
1325 && seg_left == seg_right
1326 && (seg_left != undefined_section
1327 || add_symbol == op_symbol)))
2d034539
NC		 1328 {
1329 /* Don't emit messages unless we're finalizing the symbol value,
1330 otherwise we may get the same message multiple times. */
1331 if (finalize_syms)
1332 report_op_error (symp, add_symbol, op_symbol);
1333 /* However do not move the symbol into the absolute section
1334 if it cannot currently be resolved - this would confuse
1335 other parts of the assembler into believing that the
1336 expression had been evaluated to zero. */
1337 else
1338 move_seg_ok = 0;
1339 }
1d3b2b27 1340
2d034539
NC		 1341 if (move_seg_ok
1342 && (final_seg == expr_section || final_seg == undefined_section))
0909233e 1343 final_seg = absolute_section;
252b5132
RH		 1344
1345 /* Check for division by zero. */
1346 if ((op == O_divide || op == O_modulus) && right == 0)
1347 {
1348 /* If seg_right is not absolute_section, then we've
e0890092 1349 already issued a warning about using a bad symbol. */
6386f3a7 1350 if (seg_right == absolute_section && finalize_syms)
252b5132
RH		 1351 {
1352 char *file;
1353 unsigned int line;
1354
1355 if (expr_symbol_where (symp, &file, &line))
1356 as_bad_where (file, line, _("division by zero"));
1357 else
0e389e77 1358 as_bad (_("division by zero when setting `%s'"),
252b5132
RH		 1359 S_GET_NAME (symp));
1360 }
1361
1362 right = 1;
1363 }
1364
1365 switch (symp->sy_value.X_op)
1366 {
1367 case O_multiply: left *= right; break;
1368 case O_divide: left /= right; break;
1369 case O_modulus: left %= right; break;
1370 case O_left_shift: left <<= right; break;
1371 case O_right_shift: left >>= right; break;
1372 case O_bit_inclusive_or: left |= right; break;
1373 case O_bit_or_not: left |= ~right; break;
1374 case O_bit_exclusive_or: left ^= right; break;
1375 case O_bit_and: left &= right; break;
1376 case O_add: left += right; break;
1377 case O_subtract: left -= right; break;
e0890092
AM		 1378 case O_eq:
1379 case O_ne:
1380 left = (left == right && seg_left == seg_right
1381 && (seg_left != undefined_section
1382 || add_symbol == op_symbol)
1383 ? ~ (offsetT) 0 : 0);
1384 if (symp->sy_value.X_op == O_ne)
1385 left = ~left;
1386 break;
252b5132
RH		 1387 case O_lt: left = left < right ? ~ (offsetT) 0 : 0; break;
1388 case O_le: left = left <= right ? ~ (offsetT) 0 : 0; break;
1389 case O_ge: left = left >= right ? ~ (offsetT) 0 : 0; break;
1390 case O_gt: left = left > right ? ~ (offsetT) 0 : 0; break;
1391 case O_logical_and: left = left && right; break;
1392 case O_logical_or: left = left || right; break;
1393 default: abort ();
1394 }
1395
1396 final_val += symp->sy_frag->fr_address + left;
1397 if (final_seg == expr_section || final_seg == undefined_section)
784b640d
AM		 1398 {
1399 if (seg_left == undefined_section
1400 || seg_right == undefined_section)
1401 final_seg = undefined_section;
1402 else if (seg_left == absolute_section)
1403 final_seg = seg_right;
1404 else
1405 final_seg = seg_left;
1406 }
49309057
ILT		 1407 resolved = (symbol_resolved_p (add_symbol)
1408 && symbol_resolved_p (op_symbol));
7c743825 1409 break;
252b5132 1410
252b5132
RH		 1411 case O_big:
1412 case O_illegal:
1413 /* Give an error (below) if not in expr_section. We don't
1414 want to worry about expr_section symbols, because they
1415 are fictional (they are created as part of expression
1416 resolution), and any problems may not actually mean
1417 anything. */
1418 break;
1419 }
1420
1421 symp->sy_resolving = 0;
1422 }
1423
6386f3a7 1424 if (finalize_syms)
05bdb37e 1425 S_SET_VALUE (symp, final_val);
252b5132 1426
05bdb37e
AM		 1427exit_dont_set_value:
1428 /* Always set the segment, even if not finalizing the value.
1429 The segment is used to determine whether a symbol is defined. */
05bdb37e 1430 S_SET_SEGMENT (symp, final_seg);
252b5132 1431
252b5132 1432 /* Don't worry if we can't resolve an expr_section symbol. */
6386f3a7 1433 if (finalize_syms)
252b5132
RH		 1434 {
1435 if (resolved)
1436 symp->sy_resolved = 1;
1437 else if (S_GET_SEGMENT (symp) != expr_section)
1438 {
0e389e77 1439 as_bad (_("can't resolve value for symbol `%s'"),
7c743825 1440 S_GET_NAME (symp));
252b5132
RH		 1441 symp->sy_resolved = 1;
1442 }
1443 }
1444
1445 return final_val;
1446}
1447
5a49b8ac 1448static void resolve_local_symbol (const char *, void *);
49309057
ILT		 1449
1450/* A static function passed to hash_traverse. */
1451
1452static void
5a49b8ac 1453resolve_local_symbol (const char *key ATTRIBUTE_UNUSED, void *value)
49309057
ILT		 1454{
1455 if (value != NULL)
6386f3a7 1456 resolve_symbol_value (value);
49309057
ILT		 1457}
1458
49309057
ILT		 1459/* Resolve all local symbols. */
1460
1461void
74937d39 1462resolve_local_symbol_values (void)
49309057 1463{
49309057 1464 hash_traverse (local_hash, resolve_local_symbol);
49309057
ILT		 1465}
1466
9497f5ac
NC		 1467/* Obtain the current value of a symbol without changing any
1468 sub-expressions used. */
1469
1470int
2e1e12b1 1471snapshot_symbol (symbolS **symbolPP, valueT *valueP, segT *segP, fragS **fragPP)
9497f5ac 1472{
2e1e12b1
JB		 1473 symbolS *symbolP = *symbolPP;
1474
9497f5ac
NC		 1475 if (LOCAL_SYMBOL_CHECK (symbolP))
1476 {
1477 struct local_symbol *locsym = (struct local_symbol *) symbolP;
1478
1479 *valueP = locsym->lsy_value;
1480 *segP = locsym->lsy_section;
1481 *fragPP = local_symbol_get_frag (locsym);
1482 }
1483 else
1484 {
1485 expressionS expr = symbolP->sy_value;
1486
1487 if (!symbolP->sy_resolved && expr.X_op != O_illegal)
1488 {
1489 int resolved;
1490
1491 if (symbolP->sy_resolving)
1492 return 0;
1493 symbolP->sy_resolving = 1;
1494 resolved = resolve_expression (&expr);
1495 symbolP->sy_resolving = 0;
1496 if (!resolved)
1497 return 0;
1498
1499 switch (expr.X_op)
1500 {
1501 case O_constant:
1502 case O_register:
2e1e12b1 1503 if (!symbol_equated_p (symbolP))
9497f5ac
NC		 1504 break;
1505 /* Fall thru. */
1506 case O_symbol:
1507 case O_symbol_rva:
1508 symbolP = expr.X_add_symbol;
1509 break;
1510 default:
1511 return 0;
1512 }
1513 }
1514
4dcb3903
L		 1515 /* Never change a defined symbol. */
1516 if (symbolP->bsym->section == undefined_section
1517 || symbolP->bsym->section == expr_section)
1518 *symbolPP = symbolP;
9497f5ac
NC		 1519 *valueP = expr.X_add_number;
1520 *segP = symbolP->bsym->section;
1521 *fragPP = symbolP->sy_frag;
1522
1523 if (*segP == expr_section)
1524 switch (expr.X_op)
1525 {
1526 case O_constant: *segP = absolute_section; break;
1527 case O_register: *segP = reg_section; break;
1528 default: break;
1529 }
1530 }
1531
1532 return 1;
1533}
1534
252b5132
RH		 1535/* Dollar labels look like a number followed by a dollar sign. Eg, "42$".
1536 They are *really* local. That is, they go out of scope whenever we see a
1537 label that isn't local. Also, like fb labels, there can be multiple
1538 instances of a dollar label. Therefor, we name encode each instance with
1539 the instance number, keep a list of defined symbols separate from the real
1540 symbol table, and we treat these buggers as a sparse array. */
1541
1542static long *dollar_labels;
1543static long *dollar_label_instances;
1544static char *dollar_label_defines;
1545static unsigned long dollar_label_count;
1546static unsigned long dollar_label_max;
1547
7c743825 1548int
74937d39 1549dollar_label_defined (long label)
252b5132
RH		 1550{
1551 long *i;
1552
1553 know ((dollar_labels != NULL) || (dollar_label_count == 0));
1554
1555 for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
1556 if (*i == label)
1557 return dollar_label_defines[i - dollar_labels];
1558
7c743825 1559 /* If we get here, label isn't defined. */
252b5132 1560 return 0;
7c743825 1561}
252b5132
RH		 1562
1563static long
74937d39 1564dollar_label_instance (long label)
252b5132
RH		 1565{
1566 long *i;
1567
1568 know ((dollar_labels != NULL) || (dollar_label_count == 0));
1569
1570 for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
1571 if (*i == label)
1572 return (dollar_label_instances[i - dollar_labels]);
1573
7c743825
KH		 1574 /* If we get here, we haven't seen the label before.
1575 Therefore its instance count is zero. */
252b5132
RH		 1576 return 0;
1577}
1578
7c743825 1579void
74937d39 1580dollar_label_clear (void)
252b5132
RH		 1581{
1582 memset (dollar_label_defines, '\0', (unsigned int) dollar_label_count);
1583}
1584
1585#define DOLLAR_LABEL_BUMP_BY 10
1586
7c743825 1587void
74937d39 1588define_dollar_label (long label)
252b5132
RH		 1589{
1590 long *i;
1591
1592 for (i = dollar_labels; i < dollar_labels + dollar_label_count; ++i)
1593 if (*i == label)
1594 {
1595 ++dollar_label_instances[i - dollar_labels];
1596 dollar_label_defines[i - dollar_labels] = 1;
1597 return;
1598 }
1599
7c743825 1600 /* If we get to here, we don't have label listed yet. */
252b5132
RH		 1601
1602 if (dollar_labels == NULL)
1603 {
1604 dollar_labels = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long));
1605 dollar_label_instances = (long *) xmalloc (DOLLAR_LABEL_BUMP_BY * sizeof (long));
1606 dollar_label_defines = xmalloc (DOLLAR_LABEL_BUMP_BY);
1607 dollar_label_max = DOLLAR_LABEL_BUMP_BY;
1608 dollar_label_count = 0;
1609 }
1610 else if (dollar_label_count == dollar_label_max)
1611 {
1612 dollar_label_max += DOLLAR_LABEL_BUMP_BY;
1613 dollar_labels = (long *) xrealloc ((char *) dollar_labels,
1614 dollar_label_max * sizeof (long));
1615 dollar_label_instances = (long *) xrealloc ((char *) dollar_label_instances,
1616 dollar_label_max * sizeof (long));
1617 dollar_label_defines = xrealloc (dollar_label_defines, dollar_label_max);
7c743825 1618 } /* if we needed to grow */
252b5132
RH		 1619
1620 dollar_labels[dollar_label_count] = label;
1621 dollar_label_instances[dollar_label_count] = 1;
1622 dollar_label_defines[dollar_label_count] = 1;
1623 ++dollar_label_count;
1624}
1625
7c743825
KH		 1626/* Caller must copy returned name: we re-use the area for the next name.
1627
1628 The mth occurence of label n: is turned into the symbol "Ln^Am"
1629 where n is the label number and m is the instance number. "L" makes
1630 it a label discarded unless debugging and "^A"('\1') ensures no
1631 ordinary symbol SHOULD get the same name as a local label
1632 symbol. The first "4:" is "L4^A1" - the m numbers begin at 1.
1633
1634 fb labels get the same treatment, except that ^B is used in place
1635 of ^A. */
1636
1637char * /* Return local label name. */
74937d39
KH		 1638dollar_label_name (register long n, /* we just saw "n$:" : n a number. */
1639 register int augend /* 0 for current instance, 1 for new instance. */)
252b5132
RH		 1640{
1641 long i;
7c743825 1642 /* Returned to caller, then copied. Used for created names ("4f"). */
252b5132
RH		 1643 static char symbol_name_build[24];
1644 register char *p;
1645 register char *q;
7c743825 1646 char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */
252b5132
RH		 1647
1648 know (n >= 0);
1649 know (augend == 0 || augend == 1);
1650 p = symbol_name_build;
f84dd1f0
NC		 1651#ifdef LOCAL_LABEL_PREFIX
1652 *p++ = LOCAL_LABEL_PREFIX;
1653#endif
252b5132
RH		 1654 *p++ = 'L';
1655
7c743825
KH		 1656 /* Next code just does sprintf( {}, "%d", n); */
1657 /* Label number. */
252b5132
RH		 1658 q = symbol_name_temporary;
1659 for (*q++ = 0, i = n; i; ++q)
1660 {
1661 *q = i % 10 + '0';
1662 i /= 10;
1663 }
1664 while ((*p = *--q) != '\0')
1665 ++p;
1666
aa257fcd 1667 *p++ = DOLLAR_LABEL_CHAR; /* ^A */
252b5132 1668
7c743825 1669 /* Instance number. */
252b5132
RH		 1670 q = symbol_name_temporary;
1671 for (*q++ = 0, i = dollar_label_instance (n) + augend; i; ++q)
1672 {
1673 *q = i % 10 + '0';
1674 i /= 10;
1675 }
1676 while ((*p++ = *--q) != '\0');;
1677
7c743825 1678 /* The label, as a '\0' ended string, starts at symbol_name_build. */
252b5132
RH		 1679 return symbol_name_build;
1680}
1681
47eebc20 1682/* Somebody else's idea of local labels. They are made by "n:" where n
7c743825
KH		 1683 is any decimal digit. Refer to them with
1684 "nb" for previous (backward) n:
1685 or "nf" for next (forward) n:.
1686
1687 We do a little better and let n be any number, not just a single digit, but
1688 since the other guy's assembler only does ten, we treat the first ten
1689 specially.
1690
1691 Like someone else's assembler, we have one set of local label counters for
1692 entire assembly, not one set per (sub)segment like in most assemblers. This
1693 implies that one can refer to a label in another segment, and indeed some
1694 crufty compilers have done just that.
1695
1696 Since there could be a LOT of these things, treat them as a sparse
1697 array. */
252b5132
RH		 1698
1699#define FB_LABEL_SPECIAL (10)
1700
1701static long fb_low_counter[FB_LABEL_SPECIAL];
1702static long *fb_labels;
1703static long *fb_label_instances;
1704static long fb_label_count;
1705static long fb_label_max;
1706
7c743825 1707/* This must be more than FB_LABEL_SPECIAL. */
252b5132
RH		 1708#define FB_LABEL_BUMP_BY (FB_LABEL_SPECIAL + 6)
1709
7c743825 1710static void
74937d39 1711fb_label_init (void)
252b5132
RH		 1712{
1713 memset ((void *) fb_low_counter, '\0', sizeof (fb_low_counter));
7c743825 1714}
252b5132 1715
7c743825
KH		 1716/* Add one to the instance number of this fb label. */
1717
1718void
74937d39 1719fb_label_instance_inc (long label)
252b5132
RH		 1720{
1721 long *i;
1722
1723 if (label < FB_LABEL_SPECIAL)
1724 {
1725 ++fb_low_counter[label];
1726 return;
1727 }
1728
1729 if (fb_labels != NULL)
1730 {
1731 for (i = fb_labels + FB_LABEL_SPECIAL;
1732 i < fb_labels + fb_label_count; ++i)
1733 {
1734 if (*i == label)
1735 {
1736 ++fb_label_instances[i - fb_labels];
1737 return;
7c743825
KH		 1738 } /* if we find it */
1739 } /* for each existing label */
252b5132
RH		 1740 }
1741
7c743825 1742 /* If we get to here, we don't have label listed yet. */
252b5132
RH		 1743
1744 if (fb_labels == NULL)
1745 {
1746 fb_labels = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long));
1747 fb_label_instances = (long *) xmalloc (FB_LABEL_BUMP_BY * sizeof (long));
1748 fb_label_max = FB_LABEL_BUMP_BY;
1749 fb_label_count = FB_LABEL_SPECIAL;
1750
1751 }
1752 else if (fb_label_count == fb_label_max)
1753 {
1754 fb_label_max += FB_LABEL_BUMP_BY;
1755 fb_labels = (long *) xrealloc ((char *) fb_labels,
1756 fb_label_max * sizeof (long));
1757 fb_label_instances = (long *) xrealloc ((char *) fb_label_instances,
1758 fb_label_max * sizeof (long));
7c743825 1759 } /* if we needed to grow */
252b5132
RH		 1760
1761 fb_labels[fb_label_count] = label;
1762 fb_label_instances[fb_label_count] = 1;
1763 ++fb_label_count;
1764}
1765
7c743825 1766static long
74937d39 1767fb_label_instance (long label)
252b5132
RH		 1768{
1769 long *i;
1770
1771 if (label < FB_LABEL_SPECIAL)
1772 {
1773 return (fb_low_counter[label]);
1774 }
1775
1776 if (fb_labels != NULL)
1777 {
1778 for (i = fb_labels + FB_LABEL_SPECIAL;
1779 i < fb_labels + fb_label_count; ++i)
1780 {
1781 if (*i == label)
1782 {
1783 return (fb_label_instances[i - fb_labels]);
7c743825
KH		 1784 } /* if we find it */
1785 } /* for each existing label */
252b5132
RH		 1786 }
1787
1788 /* We didn't find the label, so this must be a reference to the
1789 first instance. */
1790 return 0;
1791}
1792
7c743825
KH		 1793/* Caller must copy returned name: we re-use the area for the next name.
1794
1795 The mth occurence of label n: is turned into the symbol "Ln^Bm"
1796 where n is the label number and m is the instance number. "L" makes
1797 it a label discarded unless debugging and "^B"('\2') ensures no
1798 ordinary symbol SHOULD get the same name as a local label
1799 symbol. The first "4:" is "L4^B1" - the m numbers begin at 1.
1800
1801 dollar labels get the same treatment, except that ^A is used in
1802 place of ^B. */
1803
1804char * /* Return local label name. */
74937d39
KH		 1805fb_label_name (long n, /* We just saw "n:", "nf" or "nb" : n a number. */
1806 long augend /* 0 for nb, 1 for n:, nf. */)
252b5132
RH		 1807{
1808 long i;
7c743825 1809 /* Returned to caller, then copied. Used for created names ("4f"). */
252b5132
RH		 1810 static char symbol_name_build[24];
1811 register char *p;
1812 register char *q;
7c743825 1813 char symbol_name_temporary[20]; /* Build up a number, BACKWARDS. */
252b5132
RH		 1814
1815 know (n >= 0);
a76903bf 1816#ifdef TC_MMIX
71ba24a1 1817 know ((unsigned long) augend <= 2 /* See mmix_fb_label. */);
a76903bf 1818#else
71ba24a1 1819 know ((unsigned long) augend <= 1);
a76903bf 1820#endif
252b5132 1821 p = symbol_name_build;
aa257fcd
NC		 1822#ifdef LOCAL_LABEL_PREFIX
1823 *p++ = LOCAL_LABEL_PREFIX;
1824#endif
252b5132
RH		 1825 *p++ = 'L';
1826
7c743825
KH		 1827 /* Next code just does sprintf( {}, "%d", n); */
1828 /* Label number. */
252b5132
RH		 1829 q = symbol_name_temporary;
1830 for (*q++ = 0, i = n; i; ++q)
1831 {
1832 *q = i % 10 + '0';
1833 i /= 10;
1834 }
1835 while ((*p = *--q) != '\0')
1836 ++p;
1837
aa257fcd 1838 *p++ = LOCAL_LABEL_CHAR; /* ^B */
252b5132 1839
7c743825 1840 /* Instance number. */
252b5132
RH		 1841 q = symbol_name_temporary;
1842 for (*q++ = 0, i = fb_label_instance (n) + augend; i; ++q)
1843 {
1844 *q = i % 10 + '0';
1845 i /= 10;
1846 }
1847 while ((*p++ = *--q) != '\0');;
1848
7c743825 1849 /* The label, as a '\0' ended string, starts at symbol_name_build. */
252b5132 1850 return (symbol_name_build);
7c743825 1851}
252b5132 1852
7c743825
KH		 1853/* Decode name that may have been generated by foo_label_name() above.
1854 If the name wasn't generated by foo_label_name(), then return it
1855 unaltered. This is used for error messages. */
252b5132
RH		 1856
1857char *
74937d39 1858decode_local_label_name (char *s)
252b5132
RH		 1859{
1860 char *p;
1861 char *symbol_decode;
1862 int label_number;
1863 int instance_number;
1864 char *type;
d95767bf 1865 const char *message_format;
aa257fcd 1866 int index = 0;
43ad3147 1867
aa257fcd
NC		 1868#ifdef LOCAL_LABEL_PREFIX
1869 if (s[index] == LOCAL_LABEL_PREFIX)
1870 ++index;
1871#endif
43ad3147 1872
aa257fcd 1873 if (s[index] != 'L')
252b5132
RH		 1874 return s;
1875
3882b010 1876 for (label_number = 0, p = s + index + 1; ISDIGIT (*p); ++p)
252b5132
RH		 1877 label_number = (10 * label_number) + *p - '0';
1878
aa257fcd 1879 if (*p == DOLLAR_LABEL_CHAR)
252b5132 1880 type = "dollar";
aa257fcd 1881 else if (*p == LOCAL_LABEL_CHAR)
252b5132
RH		 1882 type = "fb";
1883 else
1884 return s;
1885
3882b010 1886 for (instance_number = 0, p++; ISDIGIT (*p); ++p)
252b5132
RH		 1887 instance_number = (10 * instance_number) + *p - '0';
1888
d95767bf 1889 message_format = _("\"%d\" (instance number %d of a %s label)");
252b5132
RH		 1890 symbol_decode = obstack_alloc (&notes, strlen (message_format) + 30);
1891 sprintf (symbol_decode, message_format, label_number, instance_number, type);
1892
1893 return symbol_decode;
1894}
1895
1896/* Get the value of a symbol. */
1897
1898valueT
74937d39 1899S_GET_VALUE (symbolS *s)
252b5132 1900{
49309057 1901 if (LOCAL_SYMBOL_CHECK (s))
ac62c346 1902 return resolve_symbol_value (s);
49309057 1903
ac62c346 1904 if (!s->sy_resolved)
e46d99eb 1905 {
6386f3a7
AM		 1906 valueT val = resolve_symbol_value (s);
1907 if (!finalize_syms)
e46d99eb
AM		 1908 return val;
1909 }
06e77878
AO		 1910 if (S_IS_WEAKREFR (s))
1911 return S_GET_VALUE (s->sy_value.X_add_symbol);
1912
252b5132
RH		 1913 if (s->sy_value.X_op != O_constant)
1914 {
252b5132
RH		 1915 if (! s->sy_resolved
1916 || s->sy_value.X_op != O_symbol
1917 || (S_IS_DEFINED (s) && ! S_IS_COMMON (s)))
0e389e77 1918 as_bad (_("attempt to get value of unresolved symbol `%s'"),
252b5132 1919 S_GET_NAME (s));
252b5132
RH		 1920 }
1921 return (valueT) s->sy_value.X_add_number;
1922}
1923
1924/* Set the value of a symbol. */
1925
1926void
74937d39 1927S_SET_VALUE (symbolS *s, valueT val)
252b5132 1928{
49309057
ILT		 1929 if (LOCAL_SYMBOL_CHECK (s))
1930 {
bd780143 1931 ((struct local_symbol *) s)->lsy_value = val;
49309057
ILT		 1932 return;
1933 }
1934
252b5132
RH		 1935 s->sy_value.X_op = O_constant;
1936 s->sy_value.X_add_number = (offsetT) val;
1937 s->sy_value.X_unsigned = 0;
06e77878 1938 S_CLEAR_WEAKREFR (s);
252b5132
RH		 1939}
1940
1941void
74937d39 1942copy_symbol_attributes (symbolS *dest, symbolS *src)
252b5132 1943{
49309057 1944 if (LOCAL_SYMBOL_CHECK (dest))
7f2f689c 1945 dest = local_symbol_convert ((struct local_symbol *) dest);
49309057 1946 if (LOCAL_SYMBOL_CHECK (src))
7f2f689c 1947 src = local_symbol_convert ((struct local_symbol *) src);
49309057 1948
252b5132
RH		 1949 /* In an expression, transfer the settings of these flags.
1950 The user can override later, of course. */
1951#define COPIED_SYMFLAGS (BSF_FUNCTION | BSF_OBJECT)
1952 dest->bsym->flags |= src->bsym->flags & COPIED_SYMFLAGS;
252b5132
RH		 1953
1954#ifdef OBJ_COPY_SYMBOL_ATTRIBUTES
1955 OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src);
1956#endif
794ba86a
DJ		 1957
1958#ifdef TC_COPY_SYMBOL_ATTRIBUTES
1959 TC_COPY_SYMBOL_ATTRIBUTES (dest, src);
1960#endif
252b5132
RH		 1961}
1962
252b5132 1963int
74937d39 1964S_IS_FUNCTION (symbolS *s)
252b5132 1965{
49309057
ILT		 1966 flagword flags;
1967
1968 if (LOCAL_SYMBOL_CHECK (s))
1969 return 0;
1970
1971 flags = s->bsym->flags;
252b5132
RH		 1972
1973 return (flags & BSF_FUNCTION) != 0;
1974}
1975
1976int
74937d39 1977S_IS_EXTERNAL (symbolS *s)
252b5132 1978{
49309057
ILT		 1979 flagword flags;
1980
1981 if (LOCAL_SYMBOL_CHECK (s))
1982 return 0;
1983
1984 flags = s->bsym->flags;
252b5132 1985
7c743825 1986 /* Sanity check. */
252b5132
RH		 1987 if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL))
1988 abort ();
1989
1990 return (flags & BSF_GLOBAL) != 0;
1991}
1992
1993int
74937d39 1994S_IS_WEAK (symbolS *s)
252b5132 1995{
49309057
ILT		 1996 if (LOCAL_SYMBOL_CHECK (s))
1997 return 0;
06e77878
AO		 1998 /* Conceptually, a weakrefr is weak if the referenced symbol is. We
1999 could probably handle a WEAKREFR as always weak though. E.g., if
2000 the referenced symbol has lost its weak status, there's no reason
2001 to keep handling the weakrefr as if it was weak. */
2002 if (S_IS_WEAKREFR (s))
2003 return S_IS_WEAK (s->sy_value.X_add_symbol);
252b5132
RH		 2004 return (s->bsym->flags & BSF_WEAK) != 0;
2005}
2006
06e77878
AO		 2007int
2008S_IS_WEAKREFR (symbolS *s)
2009{
2010 if (LOCAL_SYMBOL_CHECK (s))
2011 return 0;
2012 return s->sy_weakrefr != 0;
2013}
2014
2015int
2016S_IS_WEAKREFD (symbolS *s)
2017{
2018 if (LOCAL_SYMBOL_CHECK (s))
2019 return 0;
2020 return s->sy_weakrefd != 0;
2021}
2022
252b5132 2023int
74937d39 2024S_IS_COMMON (symbolS *s)
252b5132 2025{
49309057
ILT		 2026 if (LOCAL_SYMBOL_CHECK (s))
2027 return 0;
252b5132
RH		 2028 return bfd_is_com_section (s->bsym->section);
2029}
2030
2031int
74937d39 2032S_IS_DEFINED (symbolS *s)
252b5132 2033{
49309057
ILT		 2034 if (LOCAL_SYMBOL_CHECK (s))
2035 return ((struct local_symbol *) s)->lsy_section != undefined_section;
252b5132
RH		 2036 return s->bsym->section != undefined_section;
2037}
2038
a161fe53
AM		 2039
2040#ifndef EXTERN_FORCE_RELOC
2041#define EXTERN_FORCE_RELOC IS_ELF
2042#endif
2043
2044/* Return true for symbols that should not be reduced to section
2045 symbols or eliminated from expressions, because they may be
2046 overridden by the linker. */
2047int
74937d39 2048S_FORCE_RELOC (symbolS *s, int strict)
a161fe53
AM		 2049{
2050 if (LOCAL_SYMBOL_CHECK (s))
2051 return ((struct local_symbol *) s)->lsy_section == undefined_section;
2052
ae6063d4
AM		 2053 return ((strict
2054 && ((s->bsym->flags & BSF_WEAK) != 0
2055 || (EXTERN_FORCE_RELOC
2056 && (s->bsym->flags & BSF_GLOBAL) != 0)))
a161fe53
AM		 2057 || s->bsym->section == undefined_section
2058 || bfd_is_com_section (s->bsym->section));
2059}
2060
252b5132 2061int
74937d39 2062S_IS_DEBUG (symbolS *s)
252b5132 2063{
49309057
ILT		 2064 if (LOCAL_SYMBOL_CHECK (s))
2065 return 0;
252b5132
RH		 2066 if (s->bsym->flags & BSF_DEBUGGING)
2067 return 1;
2068 return 0;
2069}
2070
2071int
74937d39 2072S_IS_LOCAL (symbolS *s)
252b5132 2073{
49309057 2074 flagword flags;
252b5132
RH		 2075 const char *name;
2076
49309057
ILT		 2077 if (LOCAL_SYMBOL_CHECK (s))
2078 return 1;
2079
2080 flags = s->bsym->flags;
2081
7c743825 2082 /* Sanity check. */
252b5132
RH		 2083 if ((flags & BSF_LOCAL) && (flags & BSF_GLOBAL))
2084 abort ();
2085
2086 if (bfd_get_section (s->bsym) == reg_section)
2087 return 1;
2088
2089 if (flag_strip_local_absolute
bb82af9f
NC		 2090 /* Keep BSF_FILE symbols in order to allow debuggers to identify
2091 the source file even when the object file is stripped. */
2092 && (flags & (BSF_GLOBAL | BSF_FILE)) == 0
252b5132
RH		 2093 && bfd_get_section (s->bsym) == absolute_section)
2094 return 1;
2095
2096 name = S_GET_NAME (s);
2097 return (name != NULL
2098 && ! S_IS_DEBUG (s)
aa257fcd
NC		 2099 && (strchr (name, DOLLAR_LABEL_CHAR)
2100 || strchr (name, LOCAL_LABEL_CHAR)
252b5132
RH		 2101 || (! flag_keep_locals
2102 && (bfd_is_local_label (stdoutput, s->bsym)
2103 || (flag_mri
2104 && name[0] == '?'
2105 && name[1] == '?')))));
2106}
2107
252b5132 2108int
74937d39 2109S_IS_STABD (symbolS *s)
252b5132
RH		 2110{
2111 return S_GET_NAME (s) == 0;
2112}
2113
9497f5ac
NC		 2114int
2115S_IS_VOLATILE (const symbolS *s)
2116{
2117 if (LOCAL_SYMBOL_CHECK (s))
2118 return 0;
2119 return s->sy_volatile;
2120}
2121
2122int
2123S_IS_FORWARD_REF (const symbolS *s)
2124{
2125 if (LOCAL_SYMBOL_CHECK (s))
2126 return 0;
2127 return s->sy_forward_ref;
2128}
2129
9758f3fc 2130const char *
74937d39 2131S_GET_NAME (symbolS *s)
252b5132 2132{
49309057
ILT		 2133 if (LOCAL_SYMBOL_CHECK (s))
2134 return ((struct local_symbol *) s)->lsy_name;
252b5132
RH		 2135 return s->bsym->name;
2136}
2137
2138segT
74937d39 2139S_GET_SEGMENT (symbolS *s)
252b5132 2140{
49309057
ILT		 2141 if (LOCAL_SYMBOL_CHECK (s))
2142 return ((struct local_symbol *) s)->lsy_section;
252b5132
RH		 2143 return s->bsym->section;
2144}
2145
2146void
74937d39 2147S_SET_SEGMENT (symbolS *s, segT seg)
252b5132
RH		 2148{
2149 /* Don't reassign section symbols. The direct reason is to prevent seg
2150 faults assigning back to const global symbols such as *ABS*, but it
2151 shouldn't happen anyway. */
2152
49309057
ILT		 2153 if (LOCAL_SYMBOL_CHECK (s))
2154 {
2155 if (seg == reg_section)
2156 s = local_symbol_convert ((struct local_symbol *) s);
2157 else
2158 {
2159 ((struct local_symbol *) s)->lsy_section = seg;
2160 return;
2161 }
2162 }
2163
252b5132
RH		 2164 if (s->bsym->flags & BSF_SECTION_SYM)
2165 {
2166 if (s->bsym->section != seg)
7c743825 2167 abort ();
252b5132
RH		 2168 }
2169 else
2170 s->bsym->section = seg;
2171}
2172
2173void
74937d39 2174S_SET_EXTERNAL (symbolS *s)
252b5132 2175{
49309057
ILT		 2176 if (LOCAL_SYMBOL_CHECK (s))
2177 s = local_symbol_convert ((struct local_symbol *) s);
252b5132
RH		 2178 if ((s->bsym->flags & BSF_WEAK) != 0)
2179 {
2180 /* Let .weak override .global. */
2181 return;
2182 }
4d7c34bf
NC		 2183 if (s->bsym->flags & BSF_SECTION_SYM)
2184 {
2185 char * file;
2186 unsigned int line;
d1a6c242 2187
4d7c34bf
NC		 2188 /* Do not reassign section symbols. */
2189 as_where (& file, & line);
2190 as_warn_where (file, line,
0e389e77 2191 _("section symbols are already global"));
4d7c34bf
NC		 2192 return;
2193 }
97c4f2d9 2194#ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
d0548f34
L		 2195 if (S_GET_SEGMENT (s) == reg_section)
2196 {
2197 as_bad ("can't make register symbol `%s' global",
2198 S_GET_NAME (s));
2199 return;
2200 }
97c4f2d9 2201#endif
252b5132 2202 s->bsym->flags |= BSF_GLOBAL;
7c743825 2203 s->bsym->flags &= ~(BSF_LOCAL | BSF_WEAK);
977cdf5a
NC		 2204
2205#ifdef USE_UNIQUE
2206 if (! an_external_name && S_GET_NAME(s)[0] != '.')
2207 an_external_name = S_GET_NAME (s);
2208#endif
252b5132
RH		 2209}
2210
2211void
74937d39 2212S_CLEAR_EXTERNAL (symbolS *s)
252b5132 2213{
49309057
ILT		 2214 if (LOCAL_SYMBOL_CHECK (s))
2215 return;
252b5132
RH		 2216 if ((s->bsym->flags & BSF_WEAK) != 0)
2217 {
2218 /* Let .weak override. */
2219 return;
2220 }
2221 s->bsym->flags |= BSF_LOCAL;
7c743825 2222 s->bsym->flags &= ~(BSF_GLOBAL | BSF_WEAK);
252b5132
RH		 2223}
2224
2225void
74937d39 2226S_SET_WEAK (symbolS *s)
252b5132 2227{
49309057
ILT		 2228 if (LOCAL_SYMBOL_CHECK (s))
2229 s = local_symbol_convert ((struct local_symbol *) s);
06e77878
AO		 2230#ifdef obj_set_weak_hook
2231 obj_set_weak_hook (s);
2232#endif
252b5132 2233 s->bsym->flags |= BSF_WEAK;
7c743825 2234 s->bsym->flags &= ~(BSF_GLOBAL | BSF_LOCAL);
252b5132
RH		 2235}
2236
06e77878
AO		 2237void
2238S_SET_WEAKREFR (symbolS *s)
2239{
2240 if (LOCAL_SYMBOL_CHECK (s))
2241 s = local_symbol_convert ((struct local_symbol *) s);
2242 s->sy_weakrefr = 1;
2243 /* If the alias was already used, make sure we mark the target as
2244 used as well, otherwise it might be dropped from the symbol
2245 table. This may have unintended side effects if the alias is
2246 later redirected to another symbol, such as keeping the unused
2247 previous target in the symbol table. Since it will be weak, it's
2248 not a big deal. */
2249 if (s->sy_used)
2250 symbol_mark_used (s->sy_value.X_add_symbol);
2251}
2252
2253void
2254S_CLEAR_WEAKREFR (symbolS *s)
2255{
2256 if (LOCAL_SYMBOL_CHECK (s))
2257 return;
2258 s->sy_weakrefr = 0;
2259}
2260
2261void
2262S_SET_WEAKREFD (symbolS *s)
2263{
2264 if (LOCAL_SYMBOL_CHECK (s))
2265 s = local_symbol_convert ((struct local_symbol *) s);
2266 s->sy_weakrefd = 1;
2267 S_SET_WEAK (s);
2268}
2269
2270void
2271S_CLEAR_WEAKREFD (symbolS *s)
2272{
2273 if (LOCAL_SYMBOL_CHECK (s))
2274 return;
2275 if (s->sy_weakrefd)
2276 {
2277 s->sy_weakrefd = 0;
2278 /* If a weakref target symbol is weak, then it was never
2279 referenced directly before, not even in a .global directive,
2280 so decay it to local. If it remains undefined, it will be
2281 later turned into a global, like any other undefined
2282 symbol. */
2283 if (s->bsym->flags & BSF_WEAK)
2284 {
2285#ifdef obj_clear_weak_hook
2286 obj_clear_weak_hook (s);
2287#endif
2288 s->bsym->flags &= ~BSF_WEAK;
2289 s->bsym->flags |= BSF_LOCAL;
2290 }
2291 }
2292}
2293
00f7efb6 2294void
74937d39 2295S_SET_THREAD_LOCAL (symbolS *s)
00f7efb6
JJ		 2296{
2297 if (LOCAL_SYMBOL_CHECK (s))
2298 s = local_symbol_convert ((struct local_symbol *) s);
2299 if (bfd_is_com_section (s->bsym->section)
2300 && (s->bsym->flags & BSF_THREAD_LOCAL) != 0)
2301 return;
2302 s->bsym->flags |= BSF_THREAD_LOCAL;
2303 if ((s->bsym->flags & BSF_FUNCTION) != 0)
2304 as_bad (_("Accessing function `%s' as thread-local object"),
2305 S_GET_NAME (s));
2306 else if (! bfd_is_und_section (s->bsym->section)
2307 && (s->bsym->section->flags & SEC_THREAD_LOCAL) == 0)
2308 as_bad (_("Accessing `%s' as thread-local object"),
2309 S_GET_NAME (s));
2310}
2311
252b5132 2312void
977cdf5a 2313S_SET_NAME (symbolS *s, const char *name)
252b5132 2314{
49309057
ILT		 2315 if (LOCAL_SYMBOL_CHECK (s))
2316 {
2317 ((struct local_symbol *) s)->lsy_name = name;
2318 return;
2319 }
252b5132
RH		 2320 s->bsym->name = name;
2321}
49309057 2322
9497f5ac
NC		 2323void
2324S_SET_VOLATILE (symbolS *s)
2325{
2326 if (LOCAL_SYMBOL_CHECK (s))
2327 s = local_symbol_convert ((struct local_symbol *) s);
2328 s->sy_volatile = 1;
2329}
2330
92757bc9
JB		 2331void
2332S_CLEAR_VOLATILE (symbolS *s)
2333{
2334 if (!LOCAL_SYMBOL_CHECK (s))
2335 s->sy_volatile = 0;
2336}
2337
9497f5ac
NC		 2338void
2339S_SET_FORWARD_REF (symbolS *s)
2340{
2341 if (LOCAL_SYMBOL_CHECK (s))
2342 s = local_symbol_convert ((struct local_symbol *) s);
2343 s->sy_forward_ref = 1;
2344}
2345
49309057
ILT		 2346/* Return the previous symbol in a chain. */
2347
2348symbolS *
74937d39 2349symbol_previous (symbolS *s)
49309057
ILT		 2350{
2351 if (LOCAL_SYMBOL_CHECK (s))
2352 abort ();
2353 return s->sy_previous;
2354}
2355
49309057
ILT		 2356/* Return the next symbol in a chain. */
2357
2358symbolS *
74937d39 2359symbol_next (symbolS *s)
49309057
ILT		 2360{
2361 if (LOCAL_SYMBOL_CHECK (s))
2362 abort ();
2363 return s->sy_next;
2364}
2365
2366/* Return a pointer to the value of a symbol as an expression. */
2367
2368expressionS *
74937d39 2369symbol_get_value_expression (symbolS *s)
49309057
ILT		 2370{
2371 if (LOCAL_SYMBOL_CHECK (s))
2372 s = local_symbol_convert ((struct local_symbol *) s);
2373 return &s->sy_value;
2374}
2375
2376/* Set the value of a symbol to an expression. */
2377
2378void
74937d39 2379symbol_set_value_expression (symbolS *s, const expressionS *exp)
49309057
ILT		 2380{
2381 if (LOCAL_SYMBOL_CHECK (s))
2382 s = local_symbol_convert ((struct local_symbol *) s);
2383 s->sy_value = *exp;
06e77878 2384 S_CLEAR_WEAKREFR (s);
49309057
ILT		 2385}
2386
be95a9c1
AM		 2387/* Return a pointer to the X_add_number component of a symbol. */
2388
514d955d 2389offsetT *
be95a9c1
AM		 2390symbol_X_add_number (symbolS *s)
2391{
be95a9c1 2392 if (LOCAL_SYMBOL_CHECK (s))
514d955d 2393 return (offsetT *) &((struct local_symbol *) s)->lsy_value;
be95a9c1 2394
514d955d 2395 return &s->sy_value.X_add_number;
be95a9c1
AM		 2396}
2397
b7d6ed97
RH		 2398/* Set the value of SYM to the current position in the current segment. */
2399
2400void
74937d39 2401symbol_set_value_now (symbolS *sym)
b7d6ed97
RH		 2402{
2403 S_SET_SEGMENT (sym, now_seg);
2404 S_SET_VALUE (sym, frag_now_fix ());
2405 symbol_set_frag (sym, frag_now);
2406}
2407
49309057
ILT		 2408/* Set the frag of a symbol. */
2409
2410void
74937d39 2411symbol_set_frag (symbolS *s, fragS *f)
49309057
ILT		 2412{
2413 if (LOCAL_SYMBOL_CHECK (s))
2414 {
2415 local_symbol_set_frag ((struct local_symbol *) s, f);
2416 return;
2417 }
2418 s->sy_frag = f;
06e77878 2419 S_CLEAR_WEAKREFR (s);
49309057
ILT		 2420}
2421
2422/* Return the frag of a symbol. */
2423
2424fragS *
74937d39 2425symbol_get_frag (symbolS *s)
49309057
ILT		 2426{
2427 if (LOCAL_SYMBOL_CHECK (s))
2428 return local_symbol_get_frag ((struct local_symbol *) s);
2429 return s->sy_frag;
2430}
2431
2432/* Mark a symbol as having been used. */
2433
2434void
74937d39 2435symbol_mark_used (symbolS *s)
49309057
ILT		 2436{
2437 if (LOCAL_SYMBOL_CHECK (s))
2438 return;
2439 s->sy_used = 1;
06e77878
AO		 2440 if (S_IS_WEAKREFR (s))
2441 symbol_mark_used (s->sy_value.X_add_symbol);
49309057
ILT		 2442}
2443
2444/* Clear the mark of whether a symbol has been used. */
2445
2446void
74937d39 2447symbol_clear_used (symbolS *s)
49309057
ILT		 2448{
2449 if (LOCAL_SYMBOL_CHECK (s))
2450 s = local_symbol_convert ((struct local_symbol *) s);
2451 s->sy_used = 0;
2452}
2453
2454/* Return whether a symbol has been used. */
2455
2456int
74937d39 2457symbol_used_p (symbolS *s)
49309057
ILT		 2458{
2459 if (LOCAL_SYMBOL_CHECK (s))
2460 return 1;
2461 return s->sy_used;
2462}
2463
2464/* Mark a symbol as having been used in a reloc. */
2465
2466void
74937d39 2467symbol_mark_used_in_reloc (symbolS *s)
49309057
ILT		 2468{
2469 if (LOCAL_SYMBOL_CHECK (s))
2470 s = local_symbol_convert ((struct local_symbol *) s);
2471 s->sy_used_in_reloc = 1;
2472}
2473
2474/* Clear the mark of whether a symbol has been used in a reloc. */
2475
2476void
74937d39 2477symbol_clear_used_in_reloc (symbolS *s)
49309057
ILT		 2478{
2479 if (LOCAL_SYMBOL_CHECK (s))
2480 return;
2481 s->sy_used_in_reloc = 0;
2482}
2483
2484/* Return whether a symbol has been used in a reloc. */
2485
2486int
74937d39 2487symbol_used_in_reloc_p (symbolS *s)
49309057
ILT		 2488{
2489 if (LOCAL_SYMBOL_CHECK (s))
2490 return 0;
2491 return s->sy_used_in_reloc;
2492}
2493
2494/* Mark a symbol as an MRI common symbol. */
2495
2496void
74937d39 2497symbol_mark_mri_common (symbolS *s)
49309057
ILT		 2498{
2499 if (LOCAL_SYMBOL_CHECK (s))
2500 s = local_symbol_convert ((struct local_symbol *) s);
2501 s->sy_mri_common = 1;
2502}
2503
2504/* Clear the mark of whether a symbol is an MRI common symbol. */
2505
2506void
74937d39 2507symbol_clear_mri_common (symbolS *s)
49309057
ILT		 2508{
2509 if (LOCAL_SYMBOL_CHECK (s))
2510 return;
2511 s->sy_mri_common = 0;
2512}
2513
2514/* Return whether a symbol is an MRI common symbol. */
2515
2516int
74937d39 2517symbol_mri_common_p (symbolS *s)
49309057
ILT		 2518{
2519 if (LOCAL_SYMBOL_CHECK (s))
2520 return 0;
2521 return s->sy_mri_common;
2522}
2523
2524/* Mark a symbol as having been written. */
2525
2526void
74937d39 2527symbol_mark_written (symbolS *s)
49309057
ILT		 2528{
2529 if (LOCAL_SYMBOL_CHECK (s))
2530 return;
2531 s->written = 1;
2532}
2533
2534/* Clear the mark of whether a symbol has been written. */
2535
2536void
74937d39 2537symbol_clear_written (symbolS *s)
49309057
ILT		 2538{
2539 if (LOCAL_SYMBOL_CHECK (s))
2540 return;
2541 s->written = 0;
2542}
2543
2544/* Return whether a symbol has been written. */
2545
2546int
74937d39 2547symbol_written_p (symbolS *s)
49309057
ILT		 2548{
2549 if (LOCAL_SYMBOL_CHECK (s))
2550 return 0;
2551 return s->written;
2552}
2553
2554/* Mark a symbol has having been resolved. */
2555
2556void
74937d39 2557symbol_mark_resolved (symbolS *s)
49309057
ILT		 2558{
2559 if (LOCAL_SYMBOL_CHECK (s))
2560 {
2561 local_symbol_mark_resolved ((struct local_symbol *) s);
2562 return;
2563 }
2564 s->sy_resolved = 1;
2565}
2566
2567/* Return whether a symbol has been resolved. */
2568
2569int
74937d39 2570symbol_resolved_p (symbolS *s)
49309057
ILT		 2571{
2572 if (LOCAL_SYMBOL_CHECK (s))
2573 return local_symbol_resolved_p ((struct local_symbol *) s);
2574 return s->sy_resolved;
2575}
2576
2577/* Return whether a symbol is a section symbol. */
2578
2579int
74937d39 2580symbol_section_p (symbolS *s ATTRIBUTE_UNUSED)
49309057
ILT		 2581{
2582 if (LOCAL_SYMBOL_CHECK (s))
2583 return 0;
49309057 2584 return (s->bsym->flags & BSF_SECTION_SYM) != 0;
49309057
ILT		 2585}
2586
2587/* Return whether a symbol is equated to another symbol. */
2588
2589int
74937d39 2590symbol_equated_p (symbolS *s)
49309057
ILT		 2591{
2592 if (LOCAL_SYMBOL_CHECK (s))
2593 return 0;
2594 return s->sy_value.X_op == O_symbol;
2595}
2596
e0890092
AM		 2597/* Return whether a symbol is equated to another symbol, and should be
2598 treated specially when writing out relocs. */
2599
2600int
74937d39 2601symbol_equated_reloc_p (symbolS *s)
e0890092
AM		 2602{
2603 if (LOCAL_SYMBOL_CHECK (s))
2604 return 0;
2605 /* X_op_symbol, normally not used for O_symbol, is set by
2606 resolve_symbol_value to flag expression syms that have been
2607 equated. */
2608 return (s->sy_value.X_op == O_symbol
7be1c489 2609#if defined (OBJ_COFF) && defined (TE_PE)
977cdf5a
NC		 2610 && ! S_IS_WEAK (s)
2611#endif
e0890092
AM		 2612 && ((s->sy_resolved && s->sy_value.X_op_symbol != NULL)
2613 || ! S_IS_DEFINED (s)
2614 || S_IS_COMMON (s)));
2615}
2616
49309057
ILT		 2617/* Return whether a symbol has a constant value. */
2618
2619int
74937d39 2620symbol_constant_p (symbolS *s)
49309057
ILT		 2621{
2622 if (LOCAL_SYMBOL_CHECK (s))
2623 return 1;
2624 return s->sy_value.X_op == O_constant;
2625}
2626
bdf128d6
JB		 2627/* Return whether a symbol was cloned and thus removed from the global
2628 symbol list. */
2629
2630int
2631symbol_shadow_p (symbolS *s)
2632{
2633 if (LOCAL_SYMBOL_CHECK (s))
2634 return 0;
2635 return s->sy_next == s;
2636}
2637
49309057
ILT		 2638/* Return the BFD symbol for a symbol. */
2639
2640asymbol *
74937d39 2641symbol_get_bfdsym (symbolS *s)
49309057
ILT		 2642{
2643 if (LOCAL_SYMBOL_CHECK (s))
2644 s = local_symbol_convert ((struct local_symbol *) s);
2645 return s->bsym;
2646}
2647
2648/* Set the BFD symbol for a symbol. */
2649
2650void
74937d39 2651symbol_set_bfdsym (symbolS *s, asymbol *bsym)
49309057
ILT		 2652{
2653 if (LOCAL_SYMBOL_CHECK (s))
2654 s = local_symbol_convert ((struct local_symbol *) s);
22fe14ad
NC		 2655 /* Usually, it is harmless to reset a symbol to a BFD section
2656 symbol. For example, obj_elf_change_section sets the BFD symbol
2657 of an old symbol with the newly created section symbol. But when
2658 we have multiple sections with the same name, the newly created
2659 section may have the same name as an old section. We check if the
2660 old symbol has been already marked as a section symbol before
2661 resetting it. */
2662 if ((s->bsym->flags & BSF_SECTION_SYM) == 0)
2663 s->bsym = bsym;
2664 /* else XXX - What do we do now ? */
49309057
ILT		 2665}
2666
49309057
ILT		 2667#ifdef OBJ_SYMFIELD_TYPE
2668
2669/* Get a pointer to the object format information for a symbol. */
2670
2671OBJ_SYMFIELD_TYPE *
74937d39 2672symbol_get_obj (symbolS *s)
49309057
ILT		 2673{
2674 if (LOCAL_SYMBOL_CHECK (s))
2675 s = local_symbol_convert ((struct local_symbol *) s);
2676 return &s->sy_obj;
2677}
2678
2679/* Set the object format information for a symbol. */
2680
2681void
74937d39 2682symbol_set_obj (symbolS *s, OBJ_SYMFIELD_TYPE *o)
49309057
ILT		 2683{
2684 if (LOCAL_SYMBOL_CHECK (s))
2685 s = local_symbol_convert ((struct local_symbol *) s);
2686 s->sy_obj = *o;
2687}
2688
2689#endif /* OBJ_SYMFIELD_TYPE */
2690
2691#ifdef TC_SYMFIELD_TYPE
2692
2693/* Get a pointer to the processor information for a symbol. */
2694
2695TC_SYMFIELD_TYPE *
74937d39 2696symbol_get_tc (symbolS *s)
49309057
ILT		 2697{
2698 if (LOCAL_SYMBOL_CHECK (s))
2699 s = local_symbol_convert ((struct local_symbol *) s);
2700 return &s->sy_tc;
2701}
2702
2703/* Set the processor information for a symbol. */
2704
2705void
74937d39 2706symbol_set_tc (symbolS *s, TC_SYMFIELD_TYPE *o)
49309057
ILT		 2707{
2708 if (LOCAL_SYMBOL_CHECK (s))
2709 s = local_symbol_convert ((struct local_symbol *) s);
2710 s->sy_tc = *o;
2711}
2712
2713#endif /* TC_SYMFIELD_TYPE */
2714
252b5132 2715void
74937d39 2716symbol_begin (void)
252b5132
RH		 2717{
2718 symbol_lastP = NULL;
7c743825 2719 symbol_rootP = NULL; /* In case we have 0 symbols (!!) */
252b5132 2720 sy_hash = hash_new ();
49309057 2721 local_hash = hash_new ();
252b5132
RH		 2722
2723 memset ((char *) (&abs_symbol), '\0', sizeof (abs_symbol));
252b5132
RH		 2724#if defined (EMIT_SECTION_SYMBOLS) || !defined (RELOC_REQUIRES_SYMBOL)
2725 abs_symbol.bsym = bfd_abs_section.symbol;
252b5132
RH		 2726#endif
2727 abs_symbol.sy_value.X_op = O_constant;
2728 abs_symbol.sy_frag = &zero_address_frag;
2729
2730 if (LOCAL_LABELS_FB)
2731 fb_label_init ();
2732}
252b5132
RH		 2733\f
2734int indent_level;
2735
2736/* Maximum indent level.
2737 Available for modification inside a gdb session. */
87c245cc 2738static int max_indent_level = 8;
252b5132 2739
252b5132 2740void
74937d39 2741print_symbol_value_1 (FILE *file, symbolS *sym)
252b5132
RH		 2742{
2743 const char *name = S_GET_NAME (sym);
2744 if (!name || !name[0])
2745 name = "(unnamed)";
d2df793a
NC		 2746 fprintf (file, "sym ");
2747 fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) sym));
2748 fprintf (file, " %s", name);
49309057
ILT		 2749
2750 if (LOCAL_SYMBOL_CHECK (sym))
2751 {
2752 struct local_symbol *locsym = (struct local_symbol *) sym;
d2df793a
NC		 2753
2754 if (local_symbol_get_frag (locsym) != & zero_address_frag
49309057 2755 && local_symbol_get_frag (locsym) != NULL)
d2df793a
NC		 2756 {
2757 fprintf (file, " frag ");
2758 fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) local_symbol_get_frag (locsym)));
2759 }
49309057
ILT		 2760 if (local_symbol_resolved_p (locsym))
2761 fprintf (file, " resolved");
2762 fprintf (file, " local");
2763 }
2764 else
2765 {
2766 if (sym->sy_frag != &zero_address_frag)
d2df793a
NC		 2767 {
2768 fprintf (file, " frag ");
2769 fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) sym->sy_frag));
2770 }
49309057
ILT		 2771 if (sym->written)
2772 fprintf (file, " written");
2773 if (sym->sy_resolved)
2774 fprintf (file, " resolved");
2775 else if (sym->sy_resolving)
2776 fprintf (file, " resolving");
2777 if (sym->sy_used_in_reloc)
2778 fprintf (file, " used-in-reloc");
2779 if (sym->sy_used)
2780 fprintf (file, " used");
2781 if (S_IS_LOCAL (sym))
2782 fprintf (file, " local");
e97b3f28 2783 if (S_IS_EXTERNAL (sym))
49309057 2784 fprintf (file, " extern");
06e77878
AO		 2785 if (S_IS_WEAK (sym))
2786 fprintf (file, " weak");
49309057
ILT		 2787 if (S_IS_DEBUG (sym))
2788 fprintf (file, " debug");
2789 if (S_IS_DEFINED (sym))
2790 fprintf (file, " defined");
2791 }
06e77878
AO		 2792 if (S_IS_WEAKREFR (sym))
2793 fprintf (file, " weakrefr");
2794 if (S_IS_WEAKREFD (sym))
2795 fprintf (file, " weakrefd");
252b5132 2796 fprintf (file, " %s", segment_name (S_GET_SEGMENT (sym)));
49309057 2797 if (symbol_resolved_p (sym))
252b5132
RH		 2798 {
2799 segT s = S_GET_SEGMENT (sym);
2800
2801 if (s != undefined_section
411863a4 2802 && s != expr_section)
0af1713e 2803 fprintf (file, " %lx", (unsigned long) S_GET_VALUE (sym));
252b5132
RH		 2804 }
2805 else if (indent_level < max_indent_level
2806 && S_GET_SEGMENT (sym) != undefined_section)
2807 {
2808 indent_level++;
2809 fprintf (file, "\n%*s<", indent_level * 4, "");
49309057
ILT		 2810 if (LOCAL_SYMBOL_CHECK (sym))
2811 fprintf (file, "constant %lx",
0af1713e 2812 (unsigned long) ((struct local_symbol *) sym)->lsy_value);
49309057
ILT		 2813 else
2814 print_expr_1 (file, &sym->sy_value);
252b5132
RH		 2815 fprintf (file, ">");
2816 indent_level--;
2817 }
2818 fflush (file);
2819}
2820
2821void
74937d39 2822print_symbol_value (symbolS *sym)
252b5132
RH		 2823{
2824 indent_level = 0;
2825 print_symbol_value_1 (stderr, sym);
2826 fprintf (stderr, "\n");
2827}
2828
2829static void
74937d39 2830print_binary (FILE *file, const char *name, expressionS *exp)
252b5132
RH		 2831{
2832 indent_level++;
2833 fprintf (file, "%s\n%*s<", name, indent_level * 4, "");
2834 print_symbol_value_1 (file, exp->X_add_symbol);
2835 fprintf (file, ">\n%*s<", indent_level * 4, "");
2836 print_symbol_value_1 (file, exp->X_op_symbol);
2837 fprintf (file, ">");
2838 indent_level--;
2839}
2840
2841void
74937d39 2842print_expr_1 (FILE *file, expressionS *exp)
252b5132 2843{
d2df793a
NC		 2844 fprintf (file, "expr ");
2845 fprintf_vma (file, (bfd_vma) ((bfd_hostptr_t) exp));
2846 fprintf (file, " ");
252b5132
RH		 2847 switch (exp->X_op)
2848 {
2849 case O_illegal:
2850 fprintf (file, "illegal");
2851 break;
2852 case O_absent:
2853 fprintf (file, "absent");
2854 break;
2855 case O_constant:
0af1713e 2856 fprintf (file, "constant %lx", (unsigned long) exp->X_add_number);
252b5132
RH		 2857 break;
2858 case O_symbol:
2859 indent_level++;
2860 fprintf (file, "symbol\n%*s<", indent_level * 4, "");
2861 print_symbol_value_1 (file, exp->X_add_symbol);
2862 fprintf (file, ">");
2863 maybe_print_addnum:
2864 if (exp->X_add_number)
2865 fprintf (file, "\n%*s%lx", indent_level * 4, "",
0af1713e 2866 (unsigned long) exp->X_add_number);
252b5132
RH		 2867 indent_level--;
2868 break;
2869 case O_register:
2870 fprintf (file, "register #%d", (int) exp->X_add_number);
2871 break;
2872 case O_big:
2873 fprintf (file, "big");
2874 break;
2875 case O_uminus:
2876 fprintf (file, "uminus -<");
2877 indent_level++;
2878 print_symbol_value_1 (file, exp->X_add_symbol);
2879 fprintf (file, ">");
2880 goto maybe_print_addnum;
2881 case O_bit_not:
2882 fprintf (file, "bit_not");
2883 break;
2884 case O_multiply:
2885 print_binary (file, "multiply", exp);
2886 break;
2887 case O_divide:
2888 print_binary (file, "divide", exp);
2889 break;
2890 case O_modulus:
2891 print_binary (file, "modulus", exp);
2892 break;
2893 case O_left_shift:
2894 print_binary (file, "lshift", exp);
2895 break;
2896 case O_right_shift:
2897 print_binary (file, "rshift", exp);
2898 break;
2899 case O_bit_inclusive_or:
2900 print_binary (file, "bit_ior", exp);
2901 break;
2902 case O_bit_exclusive_or:
2903 print_binary (file, "bit_xor", exp);
2904 break;
2905 case O_bit_and:
2906 print_binary (file, "bit_and", exp);
2907 break;
2908 case O_eq:
2909 print_binary (file, "eq", exp);
2910 break;
2911 case O_ne:
2912 print_binary (file, "ne", exp);
2913 break;
2914 case O_lt:
2915 print_binary (file, "lt", exp);
2916 break;
2917 case O_le:
2918 print_binary (file, "le", exp);
2919 break;
2920 case O_ge:
2921 print_binary (file, "ge", exp);
2922 break;
2923 case O_gt:
2924 print_binary (file, "gt", exp);
2925 break;
2926 case O_logical_and:
2927 print_binary (file, "logical_and", exp);
2928 break;
2929 case O_logical_or:
2930 print_binary (file, "logical_or", exp);
2931 break;
2932 case O_add:
2933 indent_level++;
2934 fprintf (file, "add\n%*s<", indent_level * 4, "");
2935 print_symbol_value_1 (file, exp->X_add_symbol);
2936 fprintf (file, ">\n%*s<", indent_level * 4, "");
2937 print_symbol_value_1 (file, exp->X_op_symbol);
2938 fprintf (file, ">");
2939 goto maybe_print_addnum;
2940 case O_subtract:
2941 indent_level++;
2942 fprintf (file, "subtract\n%*s<", indent_level * 4, "");
2943 print_symbol_value_1 (file, exp->X_add_symbol);
2944 fprintf (file, ">\n%*s<", indent_level * 4, "");
2945 print_symbol_value_1 (file, exp->X_op_symbol);
2946 fprintf (file, ">");
2947 goto maybe_print_addnum;
2948 default:
2949 fprintf (file, "{unknown opcode %d}", (int) exp->X_op);
2950 break;
2951 }
2952 fflush (stdout);
2953}
2954
2955void
74937d39 2956print_expr (expressionS *exp)
252b5132
RH		 2957{
2958 print_expr_1 (stderr, exp);
2959 fprintf (stderr, "\n");
2960}
2961
2962void
74937d39 2963symbol_print_statistics (FILE *file)
252b5132
RH		 2964{
2965 hash_print_statistics (file, "symbol table", sy_hash);
49309057
ILT		 2966 hash_print_statistics (file, "mini local symbol table", local_hash);
2967 fprintf (file, "%lu mini local symbols created, %lu converted\n",
2968 local_symbol_count, local_symbol_conversion_count);
252b5132 2969}
280d71bf
DB		 2970
2971#ifdef OBJ_COMPLEX_RELC
2972
2973/* Convert given symbol to a new complex-relocation symbol name. This
6f12865c 2974 may be a recursive function, since it might be called for non-leaf
280d71bf 2975 nodes (plain symbols) in the expression tree. The caller owns the
6f12865c
AM		 2976 returning string, so should free it eventually. Errors are
2977 indicated via as_bad and a NULL return value. The given symbol
280d71bf
DB		 2978 is marked with sy_used_in_reloc. */
2979
2980char *
2981symbol_relc_make_sym (symbolS * sym)
2982{
2983 char * terminal = NULL;
2984 const char * sname;
2985 char typetag;
2986 int sname_len;
2987
2988 assert (sym != NULL);
2989
2990 /* Recurse to symbol_relc_make_expr if this symbol
2991 is defined as an expression or a plain value. */
2992 if ( S_GET_SEGMENT (sym) == expr_section
2993 || S_GET_SEGMENT (sym) == absolute_section)
2994 return symbol_relc_make_expr (& sym->sy_value);
2995
2996 /* This may be a "fake symbol" L0\001, referring to ".".
2997 Write out a special null symbol to refer to this position. */
2998 if (! strcmp (S_GET_NAME (sym), FAKE_LABEL_NAME))
2999 return xstrdup (".");
3000
3001 /* We hope this is a plain leaf symbol. Construct the encoding
3002 as {S,s}II...:CCCCCCC....
3003 where 'S'/'s' means section symbol / plain symbol
3004 III is decimal for the symbol name length
3005 CCC is the symbol name itself. */
3006 symbol_mark_used_in_reloc (sym);
3007
3008 sname = S_GET_NAME (sym);
3009 sname_len = strlen (sname);
3010 typetag = symbol_section_p (sym) ? 'S' : 's';
3011
3012 terminal = xmalloc (1 /* S or s */
3013 + 8 /* sname_len in decimal */
3014 + 1 /* _ spacer */
3015 + sname_len /* name itself */
3016 + 1 /* \0 */ );
3017
3018 sprintf (terminal, "%c%d:%s", typetag, sname_len, sname);
3019 return terminal;
3020}
3021
3022/* Convert given value to a new complex-relocation symbol name. This
3023 is a non-recursive function, since it is be called for leaf nodes
3024 (plain values) in the expression tree. The caller owns the
3025 returning string, so should free() it eventually. No errors. */
3026
3027char *
3028symbol_relc_make_value (offsetT val)
3029{
3030 char * terminal = xmalloc (28); /* Enough for long long. */
3031
3032 terminal[0] = '#';
1a412f5f 3033 bfd_sprintf_vma (stdoutput, terminal + 1, val);
280d71bf
DB		 3034 return terminal;
3035}
3036
3037/* Convert given expression to a new complex-relocation symbol name.
3038 This is a recursive function, since it traverses the entire given
3039 expression tree. The caller owns the returning string, so should
3040 free() it eventually. Errors are indicated via as_bad() and a NULL
3041 return value. */
3042
3043char *
3044symbol_relc_make_expr (expressionS * exp)
3045{
3046 char * opstr = NULL; /* Operator prefix string. */
3047 int arity = 0; /* Arity of this operator. */
3048 char * operands[3]; /* Up to three operands. */
3049 char * concat_string = NULL;
3050
3051 operands[0] = operands[1] = operands[2] = NULL;
3052
3053 assert (exp != NULL);
3054
3055 /* Match known operators -> fill in opstr, arity, operands[] and fall
3056 through to construct subexpression fragments; may instead return
3057 string directly for leaf nodes. */
3058
3059 /* See expr.h for the meaning of all these enums. Many operators
3060 have an unnatural arity (X_add_number implicitly added). The
3061 conversion logic expands them to explicit "+" subexpressions. */
3062
3063 switch (exp->X_op)
3064 {
3065 default:
3066 as_bad ("Unknown expression operator (enum %d)", exp->X_op);
3067 break;
3068
3069 /* Leaf nodes. */
3070 case O_constant:
3071 return symbol_relc_make_value (exp->X_add_number);
3072
3073 case O_symbol:
3074 if (exp->X_add_number)
3075 {
3076 arity = 2;
3077 opstr = "+";
3078 operands[0] = symbol_relc_make_sym (exp->X_add_symbol);
3079 operands[1] = symbol_relc_make_value (exp->X_add_number);
3080 break;
3081 }
3082 else
3083 return symbol_relc_make_sym (exp->X_add_symbol);
3084
3085 /* Helper macros for nesting nodes. */
3086
3087#define HANDLE_XADD_OPT1(str_) \
3088 if (exp->X_add_number) \
3089 { \
3090 arity = 2; \
3091 opstr = "+:" str_; \
3092 operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \
3093 operands[1] = symbol_relc_make_value (exp->X_add_number); \
3094 break; \
3095 } \
3096 else \
3097 { \
3098 arity = 1; \
3099 opstr = str_; \
3100 operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \
3101 } \
3102 break
3103
3104#define HANDLE_XADD_OPT2(str_) \
3105 if (exp->X_add_number) \
3106 { \
3107 arity = 3; \
3108 opstr = "+:" str_; \
3109 operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \
3110 operands[1] = symbol_relc_make_sym (exp->X_op_symbol); \
3111 operands[2] = symbol_relc_make_value (exp->X_add_number); \
3112 } \
3113 else \
3114 { \
3115 arity = 2; \
3116 opstr = str_; \
3117 operands[0] = symbol_relc_make_sym (exp->X_add_symbol); \
3118 operands[1] = symbol_relc_make_sym (exp->X_op_symbol); \
3119 } \
3120 break
3121
3122 /* Nesting nodes. */
3123
3124 case O_uminus: HANDLE_XADD_OPT1 ("0-");
3125 case O_bit_not: HANDLE_XADD_OPT1 ("~");
3126 case O_logical_not: HANDLE_XADD_OPT1 ("!");
3127 case O_multiply: HANDLE_XADD_OPT2 ("*");
3128 case O_divide: HANDLE_XADD_OPT2 ("/");
3129 case O_modulus: HANDLE_XADD_OPT2 ("%");
3130 case O_left_shift: HANDLE_XADD_OPT2 ("<<");
3131 case O_right_shift: HANDLE_XADD_OPT2 (">>");
3132 case O_bit_inclusive_or: HANDLE_XADD_OPT2 ("|");
3133 case O_bit_exclusive_or: HANDLE_XADD_OPT2 ("^");
3134 case O_bit_and: HANDLE_XADD_OPT2 ("&");
3135 case O_add: HANDLE_XADD_OPT2 ("+");
3136 case O_subtract: HANDLE_XADD_OPT2 ("-");
3137 case O_eq: HANDLE_XADD_OPT2 ("==");
3138 case O_ne: HANDLE_XADD_OPT2 ("!=");
3139 case O_lt: HANDLE_XADD_OPT2 ("<");
3140 case O_le: HANDLE_XADD_OPT2 ("<=");
3141 case O_ge: HANDLE_XADD_OPT2 (">=");
3142 case O_gt: HANDLE_XADD_OPT2 (">");
3143 case O_logical_and: HANDLE_XADD_OPT2 ("&&");
3144 case O_logical_or: HANDLE_XADD_OPT2 ("||");
3145 }
3146
3147 /* Validate & reject early. */
3148 if (arity >= 1 && ((operands[0] == NULL) || (strlen (operands[0]) == 0)))
3149 opstr = NULL;
3150 if (arity >= 2 && ((operands[1] == NULL) || (strlen (operands[1]) == 0)))
3151 opstr = NULL;
3152 if (arity >= 3 && ((operands[2] == NULL) || (strlen (operands[2]) == 0)))
3153 opstr = NULL;
3154
3155 if (opstr == NULL)
3156 concat_string = NULL;
3157 else
3158 {
3159 /* Allocate new string; include inter-operand padding gaps etc. */
3160 concat_string = xmalloc (strlen (opstr)
3161 + 1
3162 + (arity >= 1 ? (strlen (operands[0]) + 1 ) : 0)
3163 + (arity >= 2 ? (strlen (operands[1]) + 1 ) : 0)
3164 + (arity >= 3 ? (strlen (operands[2]) + 0 ) : 0)
3165 + 1);
3166 assert (concat_string != NULL);
3167
3168 /* Format the thing. */
3169 sprintf (concat_string,
3170 (arity == 0 ? "%s" :
3171 arity == 1 ? "%s:%s" :
3172 arity == 2 ? "%s:%s:%s" :
3173 /* arity == 3 */ "%s:%s:%s:%s"),
3174 opstr, operands[0], operands[1], operands[2]);
3175 }
3176
3177 /* Free operand strings (not opstr). */
3178 if (arity >= 1) xfree (operands[0]);
3179 if (arity >= 2) xfree (operands[1]);
3180 if (arity >= 3) xfree (operands[2]);
3181
3182 return concat_string;
3183}
3184
3185#endif
GDB Binutils - Deliverables
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