aboutsummaryrefslogtreecommitdiff
path: root/ld/ldgram.y
blob: ed0aaa76259933ba42e4eef343779ed173d1d354 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
/* A YACC grammar to parse a superset of the AT&T linker scripting language.
   Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
   Free Software Foundation, Inc.
   Written by Steve Chamberlain of Cygnus Support (steve@cygnus.com).

   This file is part of the GNU Binutils.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

%{
/*

 */

#define DONTDECLARE_MALLOC

#include "sysdep.h"
#include "bfd.h"
#include "bfdlink.h"
#include "ld.h"
#include "ldexp.h"
#include "ldver.h"
#include "ldlang.h"
#include "ldfile.h"
#include "ldemul.h"
#include "ldmisc.h"
#include "ldmain.h"
#include "mri.h"
#include "ldctor.h"
#include "ldlex.h"

#ifndef YYDEBUG
#define YYDEBUG 1
#endif

static enum section_type sectype;
static lang_memory_region_type *region;

bfd_boolean ldgram_had_keep = FALSE;
char *ldgram_vers_current_lang = NULL;

#define ERROR_NAME_MAX 20
static char *error_names[ERROR_NAME_MAX];
static int error_index;
#define PUSH_ERROR(x) if (error_index < ERROR_NAME_MAX) error_names[error_index] = x; error_index++;
#define POP_ERROR()   error_index--;
%}
%union {
  bfd_vma integer;
  struct big_int
    {
      bfd_vma integer;
      char *str;
    } bigint;
  fill_type *fill;
  char *name;
  const char *cname;
  struct wildcard_spec wildcard;
  struct wildcard_list *wildcard_list;
  struct name_list *name_list;
  int token;
  union etree_union *etree;
  struct phdr_info
    {
      bfd_boolean filehdr;
      bfd_boolean phdrs;
      union etree_union *at;
      union etree_union *flags;
    } phdr;
  struct lang_nocrossref *nocrossref;
  struct lang_output_section_phdr_list *section_phdr;
  struct bfd_elf_version_deps *deflist;
  struct bfd_elf_version_expr *versyms;
  struct bfd_elf_version_tree *versnode;
}

%type <etree> exp opt_exp_with_type mustbe_exp opt_at phdr_type phdr_val
%type <etree> opt_exp_without_type opt_subalign opt_align
%type <fill> fill_opt fill_exp
%type <name_list> exclude_name_list
%type <wildcard_list> file_NAME_list
%type <name> memspec_opt casesymlist
%type <name> memspec_at_opt
%type <cname> wildcard_name
%type <wildcard> wildcard_spec
%token <bigint> INT
%token <name> NAME LNAME
%type <integer> length
%type <phdr> phdr_qualifiers
%type <nocrossref> nocrossref_list
%type <section_phdr> phdr_opt
%type <integer> opt_nocrossrefs

%right <token> PLUSEQ MINUSEQ MULTEQ DIVEQ  '=' LSHIFTEQ RSHIFTEQ   ANDEQ OREQ
%right <token> '?' ':'
%left <token> OROR
%left <token>  ANDAND
%left <token> '|'
%left <token>  '^'
%left  <token> '&'
%left <token>  EQ NE
%left  <token> '<' '>' LE GE
%left  <token> LSHIFT RSHIFT

%left  <token> '+' '-'
%left  <token> '*' '/' '%'

%right UNARY
%token END
%left <token> '('
%token <token> ALIGN_K BLOCK BIND QUAD SQUAD LONG SHORT BYTE
%token SECTIONS PHDRS INSERT_K AFTER BEFORE
%token DATA_SEGMENT_ALIGN DATA_SEGMENT_RELRO_END DATA_SEGMENT_END
%token SORT_BY_NAME SORT_BY_ALIGNMENT
%token SORT_BY_INIT_PRIORITY
%token '{' '}'
%token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH
%token INHIBIT_COMMON_ALLOCATION
%token SEGMENT_START
%token INCLUDE
%token MEMORY
%token REGION_ALIAS
%token NOLOAD DSECT COPY INFO OVERLAY
%token DEFINED TARGET_K SEARCH_DIR MAP ENTRY
%token <integer> NEXT
%token SIZEOF ALIGNOF ADDR LOADADDR MAX_K MIN_K
%token STARTUP HLL SYSLIB FLOAT NOFLOAT NOCROSSREFS
%token ORIGIN FILL
%token LENGTH CREATE_OBJECT_SYMBOLS INPUT GROUP OUTPUT CONSTRUCTORS
%token ALIGNMOD AT SUBALIGN PROVIDE PROVIDE_HIDDEN AS_NEEDED
%type <token> assign_op atype attributes_opt sect_constraint
%type <name>  filename
%token CHIP LIST SECT ABSOLUTE  LOAD NEWLINE ENDWORD ORDER NAMEWORD ASSERT_K
%token FORMAT PUBLIC DEFSYMEND BASE ALIAS TRUNCATE REL
%token INPUT_SCRIPT INPUT_MRI_SCRIPT INPUT_DEFSYM CASE EXTERN START
%token <name> VERS_TAG VERS_IDENTIFIER
%token GLOBAL LOCAL VERSIONK INPUT_VERSION_SCRIPT
%token KEEP ONLY_IF_RO ONLY_IF_RW SPECIAL
%token EXCLUDE_FILE
%token CONSTANT
%type <versyms> vers_defns
%type <versnode> vers_tag
%type <deflist> verdep
%token INPUT_DYNAMIC_LIST

%%

file:
		INPUT_SCRIPT script_file
	|	INPUT_MRI_SCRIPT mri_script_file
	|	INPUT_VERSION_SCRIPT version_script_file
	|	INPUT_DYNAMIC_LIST dynamic_list_file
	|	INPUT_DEFSYM defsym_expr
	;


filename:  NAME;


defsym_expr:
		{ ldlex_defsym(); }
		NAME '=' exp
		{
		  ldlex_popstate();
		  lang_add_assignment(exp_assop($3,$2,$4));
		}
	;

/* SYNTAX WITHIN AN MRI SCRIPT FILE */
mri_script_file:
		{
		  ldlex_mri_script ();
		  PUSH_ERROR (_("MRI style script"));
		}
	     mri_script_lines
		{
		  ldlex_popstate ();
		  mri_draw_tree ();
		  POP_ERROR ();
		}
	;

mri_script_lines:
		mri_script_lines mri_script_command NEWLINE
          |
	;

mri_script_command:
		CHIP  exp
	|	CHIP  exp ',' exp
	|	NAME 	{
			einfo(_("%P%F: unrecognised keyword in MRI style script '%s'\n"),$1);
			}
	|	LIST  	{
			config.map_filename = "-";
			}
        |       ORDER ordernamelist
	|       ENDWORD
        |       PUBLIC NAME '=' exp
 			{ mri_public($2, $4); }
        |       PUBLIC NAME ',' exp
 			{ mri_public($2, $4); }
        |       PUBLIC NAME  exp
 			{ mri_public($2, $3); }
	| 	FORMAT NAME
			{ mri_format($2); }
	|	SECT NAME ',' exp
			{ mri_output_section($2, $4);}
	|	SECT NAME  exp
			{ mri_output_section($2, $3);}
	|	SECT NAME '=' exp
			{ mri_output_section($2, $4);}
	|	ALIGN_K NAME '=' exp
			{ mri_align($2,$4); }
	|	ALIGN_K NAME ',' exp
			{ mri_align($2,$4); }
	|	ALIGNMOD NAME '=' exp
			{ mri_alignmod($2,$4); }
	|	ALIGNMOD NAME ',' exp
			{ mri_alignmod($2,$4); }
	|	ABSOLUTE mri_abs_name_list
	|	LOAD	 mri_load_name_list
	|       NAMEWORD NAME
			{ mri_name($2); }
	|	ALIAS NAME ',' NAME
			{ mri_alias($2,$4,0);}
	|	ALIAS NAME ',' INT
			{ mri_alias ($2, 0, (int) $4.integer); }
	|	BASE     exp
			{ mri_base($2); }
	|	TRUNCATE INT
		{ mri_truncate ((unsigned int) $2.integer); }
	|	CASE casesymlist
	|	EXTERN extern_name_list
	|	INCLUDE filename
		{ ldlex_script (); ldfile_open_command_file($2); }
		mri_script_lines END
		{ ldlex_popstate (); }
	|	START NAME
		{ lang_add_entry ($2, FALSE); }
        |
	;

ordernamelist:
	      ordernamelist ',' NAME         { mri_order($3); }
	|     ordernamelist  NAME         { mri_order($2); }
      	|
	;

mri_load_name_list:
		NAME
			{ mri_load($1); }
	|	mri_load_name_list ',' NAME { mri_load($3); }
	;

mri_abs_name_list:
 		NAME
 			{ mri_only_load($1); }
	|	mri_abs_name_list ','  NAME
 			{ mri_only_load($3); }
	;

casesymlist:
	  /* empty */ { $$ = NULL; }
	| NAME
	| casesymlist ',' NAME
	;

/* Parsed as expressions so that commas separate entries */
extern_name_list:
	{ ldlex_expression (); }
	extern_name_list_body
	{ ldlex_popstate (); }

extern_name_list_body:
	  NAME
			{ ldlang_add_undef ($1, FALSE); }
	| extern_name_list_body NAME
			{ ldlang_add_undef ($2, FALSE); }
	| extern_name_list_body ',' NAME
			{ ldlang_add_undef ($3, FALSE); }
	;

script_file:
	{ ldlex_both(); }
	ifile_list
	{ ldlex_popstate(); }
        ;

ifile_list:
	ifile_list ifile_p1
        |
	;


ifile_p1:
		memory
	|	sections
	|	phdrs
	|	startup
	|	high_level_library
	|	low_level_library
	|	floating_point_support
	|	statement_anywhere
	|	version
        |	 ';'
	|	TARGET_K '(' NAME ')'
		{ lang_add_target($3); }
	|	SEARCH_DIR '(' filename ')'
		{ ldfile_add_library_path ($3, FALSE); }
	|	OUTPUT '(' filename ')'
		{ lang_add_output($3, 1); }
        |	OUTPUT_FORMAT '(' NAME ')'
		  { lang_add_output_format ($3, (char *) NULL,
					    (char *) NULL, 1); }
	|	OUTPUT_FORMAT '(' NAME ',' NAME ',' NAME ')'
		  { lang_add_output_format ($3, $5, $7, 1); }
        |	OUTPUT_ARCH '(' NAME ')'
		  { ldfile_set_output_arch ($3, bfd_arch_unknown); }
	|	FORCE_COMMON_ALLOCATION
		{ command_line.force_common_definition = TRUE ; }
	|	INHIBIT_COMMON_ALLOCATION
		{ command_line.inhibit_common_definition = TRUE ; }
	|	INPUT '(' input_list ')'
	|	GROUP
		  { lang_enter_group (); }
		    '(' input_list ')'
		  { lang_leave_group (); }
     	|	MAP '(' filename ')'
		{ lang_add_map($3); }
	|	INCLUDE filename
		{ ldlex_script (); ldfile_open_command_file($2); }
		ifile_list END
		{ ldlex_popstate (); }
	|	NOCROSSREFS '(' nocrossref_list ')'
		{
		  lang_add_nocrossref ($3);
		}
	|	EXTERN '(' extern_name_list ')'
	|	INSERT_K AFTER NAME
		{ lang_add_insert ($3, 0); }
	|	INSERT_K BEFORE NAME
		{ lang_add_insert ($3, 1); }
	|	REGION_ALIAS '(' NAME ',' NAME ')'
		{ lang_memory_region_alias ($3, $5); }
	;

input_list:
		NAME
		{ lang_add_input_file($1,lang_input_file_is_search_file_enum,
				 (char *)NULL); }
	|	input_list ',' NAME
		{ lang_add_input_file($3,lang_input_file_is_search_file_enum,
				 (char *)NULL); }
	|	input_list NAME
		{ lang_add_input_file($2,lang_input_file_is_search_file_enum,
				 (char *)NULL); }
	|	LNAME
		{ lang_add_input_file($1,lang_input_file_is_l_enum,
				 (char *)NULL); }
	|	input_list ',' LNAME
		{ lang_add_input_file($3,lang_input_file_is_l_enum,
				 (char *)NULL); }
	|	input_list LNAME
		{ lang_add_input_file($2,lang_input_file_is_l_enum,
				 (char *)NULL); }
	|	AS_NEEDED '('
		  { $<integer>$ = add_DT_NEEDED_for_regular; add_DT_NEEDED_for_regular = TRUE; }
		     input_list ')'
		  { add_DT_NEEDED_for_regular = $<integer>3; }
	|	input_list ',' AS_NEEDED '('
		  { $<integer>$ = add_DT_NEEDED_for_regular; add_DT_NEEDED_for_regular = TRUE; }
		     input_list ')'
		  { add_DT_NEEDED_for_regular = $<integer>5; }
	|	input_list AS_NEEDED '('
		  { $<integer>$ = add_DT_NEEDED_for_regular; add_DT_NEEDED_for_regular = TRUE; }
		     input_list ')'
		  { add_DT_NEEDED_for_regular = $<integer>4; }
	;

sections:
		SECTIONS '{' sec_or_group_p1 '}'
	;

sec_or_group_p1:
		sec_or_group_p1 section
	|	sec_or_group_p1 statement_anywhere
	|
	;

statement_anywhere:
		ENTRY '(' NAME ')'
		{ lang_add_entry ($3, FALSE); }
	|	assignment end
	|	ASSERT_K  {ldlex_expression ();} '(' exp ',' NAME ')'
		{ ldlex_popstate ();
		  lang_add_assignment (exp_assert ($4, $6)); }
	;

/* The '*' and '?' cases are there because the lexer returns them as
   separate tokens rather than as NAME.  */
wildcard_name:
		NAME
			{
			  $$ = $1;
			}
	|	'*'
			{
			  $$ = "*";
			}
	|	'?'
			{
			  $$ = "?";
			}
	;

wildcard_spec:
		wildcard_name
			{
			  $$.name = $1;
			  $$.sorted = none;
			  $$.exclude_name_list = NULL;
			}
	| 	EXCLUDE_FILE '(' exclude_name_list ')' wildcard_name
			{
			  $$.name = $5;
			  $$.sorted = none;
			  $$.exclude_name_list = $3;
			}
	|	SORT_BY_NAME '(' wildcard_name ')'
			{
			  $$.name = $3;
			  $$.sorted = by_name;
			  $$.exclude_name_list = NULL;
			}
	|	SORT_BY_ALIGNMENT '(' wildcard_name ')'
			{
			  $$.name = $3;
			  $$.sorted = by_alignment;
			  $$.exclude_name_list = NULL;
			}
	|	SORT_BY_NAME '(' SORT_BY_ALIGNMENT '(' wildcard_name ')' ')'
			{
			  $$.name = $5;
			  $$.sorted = by_name_alignment;
			  $$.exclude_name_list = NULL;
			}
	|	SORT_BY_NAME '(' SORT_BY_NAME '(' wildcard_name ')' ')'
			{
			  $$.name = $5;
			  $$.sorted = by_name;
			  $$.exclude_name_list = NULL;
			}
	|	SORT_BY_ALIGNMENT '(' SORT_BY_NAME '(' wildcard_name ')' ')'
			{
			  $$.name = $5;
			  $$.sorted = by_alignment_name;
			  $$.exclude_name_list = NULL;
			}
	|	SORT_BY_ALIGNMENT '(' SORT_BY_ALIGNMENT '(' wildcard_name ')' ')'
			{
			  $$.name = $5;
			  $$.sorted = by_alignment;
			  $$.exclude_name_list = NULL;
			}
	|	SORT_BY_NAME '(' EXCLUDE_FILE '(' exclude_name_list ')' wildcard_name ')'
			{
			  $$.name = $7;
			  $$.sorted = by_name;
			  $$.exclude_name_list = $5;
			}
	|	SORT_BY_INIT_PRIORITY '(' wildcard_name ')'
			{
			  $$.name = $3;
			  $$.sorted = by_init_priority;
			  $$.exclude_name_list = NULL;
			}
	;

exclude_name_list:
		exclude_name_list wildcard_name
			{
			  struct name_list *tmp;
			  tmp = (struct name_list *) xmalloc (sizeof *tmp);
			  tmp->name = $2;
			  tmp->next = $1;
			  $$ = tmp;
			}
	|
		wildcard_name
			{
			  struct name_list *tmp;
			  tmp = (struct name_list *) xmalloc (sizeof *tmp);
			  tmp->name = $1;
			  tmp->next = NULL;
			  $$ = tmp;
			}
	;

file_NAME_list:
		file_NAME_list opt_comma wildcard_spec
			{
			  struct wildcard_list *tmp;
			  tmp = (struct wildcard_list *) xmalloc (sizeof *tmp);
			  tmp->next = $1;
			  tmp->spec = $3;
			  $$ = tmp;
			}
	|
		wildcard_spec
			{
			  struct wildcard_list *tmp;
			  tmp = (struct wildcard_list *) xmalloc (sizeof *tmp);
			  tmp->next = NULL;
			  tmp->spec = $1;
			  $$ = tmp;
			}
	;

input_section_spec_no_keep:
		NAME
			{
			  struct wildcard_spec tmp;
			  tmp.name = $1;
			  tmp.exclude_name_list = NULL;
			  tmp.sorted = none;
			  lang_add_wild (&tmp, NULL, ldgram_had_keep);
			}
        |	'[' file_NAME_list ']'
			{
			  lang_add_wild (NULL, $2, ldgram_had_keep);
			}
	|	wildcard_spec '(' file_NAME_list ')'
			{
			  lang_add_wild (&$1, $3, ldgram_had_keep);
			}
	;

input_section_spec:
		input_section_spec_no_keep
	|	KEEP '('
			{ ldgram_had_keep = TRUE; }
		input_section_spec_no_keep ')'
			{ ldgram_had_keep = FALSE; }
	;

statement:
	  	assignment end
	|	CREATE_OBJECT_SYMBOLS
		{
 		lang_add_attribute(lang_object_symbols_statement_enum);
	      	}
        |	';'
        |	CONSTRUCTORS
		{

		  lang_add_attribute(lang_constructors_statement_enum);
		}
	| SORT_BY_NAME '(' CONSTRUCTORS ')'
		{
		  constructors_sorted = TRUE;
		  lang_add_attribute (lang_constructors_statement_enum);
		}
	| input_section_spec
        | length '(' mustbe_exp ')'
        	        {
			  lang_add_data ((int) $1, $3);
			}

	| FILL '(' fill_exp ')'
			{
			  lang_add_fill ($3);
			}
	| ASSERT_K  {ldlex_expression ();} '(' exp ',' NAME ')' end
			{ ldlex_popstate ();
			  lang_add_assignment (exp_assert ($4, $6)); }
	| INCLUDE filename
		{ ldlex_script (); ldfile_open_command_file($2); }
		statement_list_opt END
		{ ldlex_popstate (); }
	;

statement_list:
		statement_list statement
  	|  	statement
	;

statement_list_opt:
		/* empty */
	|	statement_list
	;

length:
		QUAD
			{ $$ = $1; }
	|	SQUAD
			{ $$ = $1; }
	|	LONG
			{ $$ = $1; }
	| 	SHORT
			{ $$ = $1; }
	|	BYTE
			{ $$ = $1; }
	;

fill_exp:
	mustbe_exp
		{
		  $$ = exp_get_fill ($1, 0, "fill value");
		}
	;

fill_opt:
	  '=' fill_exp
		{ $$ = $2; }
	| 	{ $$ = (fill_type *) 0; }
	;

assign_op:
		PLUSEQ
			{ $$ = '+'; }
	|	MINUSEQ
			{ $$ = '-'; }
	| 	MULTEQ
			{ $$ = '*'; }
	| 	DIVEQ
			{ $$ = '/'; }
	| 	LSHIFTEQ
			{ $$ = LSHIFT; }
	| 	RSHIFTEQ
			{ $$ = RSHIFT; }
	| 	ANDEQ
			{ $$ = '&'; }
	| 	OREQ
			{ $$ = '|'; }

	;

end:	';' | ','
	;


assignment:
		NAME '=' mustbe_exp
		{
		  lang_add_assignment (exp_assop ($2, $1, $3));
		}
	|	NAME assign_op mustbe_exp
		{
		  lang_add_assignment (exp_assop ('=', $1,
						  exp_binop ($2,
							     exp_nameop (NAME,
									 $1),
							     $3)));
		}
	|	PROVIDE '(' NAME '=' mustbe_exp ')'
		{
		  lang_add_assignment (exp_provide ($3, $5, FALSE));
		}
	|	PROVIDE_HIDDEN '(' NAME '=' mustbe_exp ')'
		{
		  lang_add_assignment (exp_provide ($3, $5, TRUE));
		}
	;


opt_comma:
		','	|	;


memory:
		MEMORY '{' memory_spec_list_opt '}'
	;

memory_spec_list_opt: memory_spec_list | ;

memory_spec_list:
		memory_spec_list opt_comma memory_spec
	|	memory_spec
	;


memory_spec: 	NAME
		{ region = lang_memory_region_lookup ($1, TRUE); }
		attributes_opt ':'
		origin_spec opt_comma length_spec
		{}
	|	INCLUDE filename
		{ ldlex_script (); ldfile_open_command_file($2); }
		memory_spec_list_opt END
		{ ldlex_popstate (); }
	;

origin_spec:
	ORIGIN '=' mustbe_exp
		{
		  region->origin = exp_get_vma ($3, 0, "origin");
		  region->current = region->origin;
		}
	;

length_spec:
             LENGTH '=' mustbe_exp
		{
		  region->length = exp_get_vma ($3, -1, "length");
		}
	;

attributes_opt:
		/* empty */
		  { /* dummy action to avoid bison 1.25 error message */ }
	|	'(' attributes_list ')'
	;

attributes_list:
		attributes_string
	|	attributes_list attributes_string
	;

attributes_string:
		NAME
		  { lang_set_flags (region, $1, 0); }
	|	'!' NAME
		  { lang_set_flags (region, $2, 1); }
	;

startup:
	STARTUP '(' filename ')'
		{ lang_startup($3); }
	;

high_level_library:
		HLL '(' high_level_library_NAME_list ')'
	|	HLL '(' ')'
			{ ldemul_hll((char *)NULL); }
	;

high_level_library_NAME_list:
		high_level_library_NAME_list opt_comma filename
			{ ldemul_hll($3); }
	|	filename
			{ ldemul_hll($1); }

	;

low_level_library:
	SYSLIB '(' low_level_library_NAME_list ')'
	; low_level_library_NAME_list:
		low_level_library_NAME_list opt_comma filename
			{ ldemul_syslib($3); }
	|
	;

floating_point_support:
		FLOAT
			{ lang_float(TRUE); }
	|	NOFLOAT
			{ lang_float(FALSE); }
	;

nocrossref_list:
		/* empty */
		{
		  $$ = NULL;
		}
	|	NAME nocrossref_list
		{
		  struct lang_nocrossref *n;

		  n = (struct lang_nocrossref *) xmalloc (sizeof *n);
		  n->name = $1;
		  n->next = $2;
		  $$ = n;
		}
	|	NAME ',' nocrossref_list
		{
		  struct lang_nocrossref *n;

		  n = (struct lang_nocrossref *) xmalloc (sizeof *n);
		  n->name = $1;
		  n->next = $3;
		  $$ = n;
		}
	;

mustbe_exp:		 { ldlex_expression (); }
		exp
			 { ldlex_popstate (); $$=$2;}
	;

exp	:
		'-' exp %prec UNARY
			{ $$ = exp_unop ('-', $2); }
	|	'(' exp ')'
			{ $$ = $2; }
	|	NEXT '(' exp ')' %prec UNARY
			{ $$ = exp_unop ((int) $1,$3); }
	|	'!' exp %prec UNARY
			{ $$ = exp_unop ('!', $2); }
	|	'+' exp %prec UNARY
			{ $$ = $2; }
	|	'~' exp %prec UNARY
			{ $$ = exp_unop ('~', $2);}

	|	exp '*' exp
			{ $$ = exp_binop ('*', $1, $3); }
	|	exp '/' exp
			{ $$ = exp_binop ('/', $1, $3); }
	|	exp '%' exp
			{ $$ = exp_binop ('%', $1, $3); }
	|	exp '+' exp
			{ $$ = exp_binop ('+', $1, $3); }
	|	exp '-' exp
			{ $$ = exp_binop ('-' , $1, $3); }
	|	exp LSHIFT exp
			{ $$ = exp_binop (LSHIFT , $1, $3); }
	|	exp RSHIFT exp
			{ $$ = exp_binop (RSHIFT , $1, $3); }
	|	exp EQ exp
			{ $$ = exp_binop (EQ , $1, $3); }
	|	exp NE exp
			{ $$ = exp_binop (NE , $1, $3); }
	|	exp LE exp
			{ $$ = exp_binop (LE , $1, $3); }
  	|	exp GE exp
			{ $$ = exp_binop (GE , $1, $3); }
	|	exp '<' exp
			{ $$ = exp_binop ('<' , $1, $3); }
	|	exp '>' exp
			{ $$ = exp_binop ('>' , $1, $3); }
	|	exp '&' exp
			{ $$ = exp_binop ('&' , $1, $3); }
	|	exp '^' exp
			{ $$ = exp_binop ('^' , $1, $3); }
	|	exp '|' exp
			{ $$ = exp_binop ('|' , $1, $3); }
	|	exp '?' exp ':' exp
			{ $$ = exp_trinop ('?' , $1, $3, $5); }
	|	exp ANDAND exp
			{ $$ = exp_binop (ANDAND , $1, $3); }
	|	exp OROR exp
			{ $$ = exp_binop (OROR , $1, $3); }
	|	DEFINED '(' NAME ')'
			{ $$ = exp_nameop (DEFINED, $3); }
	|	INT
			{ $$ = exp_bigintop ($1.integer, $1.str); }
        |	SIZEOF_HEADERS
			{ $$ = exp_nameop (SIZEOF_HEADERS,0); }

	|	ALIGNOF '(' NAME ')'
			{ $$ = exp_nameop (ALIGNOF,$3); }
	|	SIZEOF '(' NAME ')'
			{ $$ = exp_nameop (SIZEOF,$3); }
	|	ADDR '(' NAME ')'
			{ $$ = exp_nameop (ADDR,$3); }
	|	LOADADDR '(' NAME ')'
			{ $$ = exp_nameop (LOADADDR,$3); }
	|	CONSTANT '(' NAME ')'
			{ $$ = exp_nameop (CONSTANT,$3); }
	|	ABSOLUTE '(' exp ')'
			{ $$ = exp_unop (ABSOLUTE, $3); }
	|	ALIGN_K '(' exp ')'
			{ $$ = exp_unop (ALIGN_K,$3); }
	|	ALIGN_K '(' exp ',' exp ')'
			{ $$ = exp_binop (ALIGN_K,$3,$5); }
	|	DATA_SEGMENT_ALIGN '(' exp ',' exp ')'
			{ $$ = exp_binop (DATA_SEGMENT_ALIGN, $3, $5); }
	|	DATA_SEGMENT_RELRO_END '(' exp ',' exp ')'
			{ $$ = exp_binop (DATA_SEGMENT_RELRO_END, $5, $3); }
	|	DATA_SEGMENT_END '(' exp ')'
			{ $$ = exp_unop (DATA_SEGMENT_END, $3); }
        |       SEGMENT_START '(' NAME ',' exp ')'
                        { /* The operands to the expression node are
			     placed in the opposite order from the way
			     in which they appear in the script as
			     that allows us to reuse more code in
			     fold_binary.  */
			  $$ = exp_binop (SEGMENT_START,
					  $5,
					  exp_nameop (NAME, $3)); }
	|	BLOCK '(' exp ')'
			{ $$ = exp_unop (ALIGN_K,$3); }
	|	NAME
			{ $$ = exp_nameop (NAME,$1); }
	|	MAX_K '(' exp ',' exp ')'
			{ $$ = exp_binop (MAX_K, $3, $5 ); }
	|	MIN_K '(' exp ',' exp ')'
			{ $$ = exp_binop (MIN_K, $3, $5 ); }
	|	ASSERT_K '(' exp ',' NAME ')'
			{ $$ = exp_assert ($3, $5); }
	|	ORIGIN '(' NAME ')'
			{ $$ = exp_nameop (ORIGIN, $3); }
	|	LENGTH '(' NAME ')'
			{ $$ = exp_nameop (LENGTH, $3); }
	;


memspec_at_opt:
                AT '>' NAME { $$ = $3; }
        |       { $$ = 0; }
        ;

opt_at:
		AT '(' exp ')' { $$ = $3; }
	|	{ $$ = 0; }
	;

opt_align:
		ALIGN_K '(' exp ')' { $$ = $3; }
	|	{ $$ = 0; }
	;

opt_subalign:
		SUBALIGN '(' exp ')' { $$ = $3; }
	|	{ $$ = 0; }
	;

sect_constraint:
		ONLY_IF_RO { $$ = ONLY_IF_RO; }
	|	ONLY_IF_RW { $$ = ONLY_IF_RW; }
	|	SPECIAL { $$ = SPECIAL; }
	|	{ $$ = 0; }
	;

section:	NAME 		{ ldlex_expression(); }
		opt_exp_with_type
		opt_at
		opt_align
		opt_subalign	{ ldlex_popstate (); ldlex_script (); }
		sect_constraint
		'{'
			{
			  lang_enter_output_section_statement($1, $3,
							      sectype,
							      $5, $6, $4, $8);
			}
		statement_list_opt
 		'}' { ldlex_popstate (); ldlex_expression (); }
		memspec_opt memspec_at_opt phdr_opt fill_opt
		{
		  ldlex_popstate ();
		  lang_leave_output_section_statement ($17, $14, $16, $15);
		}
		opt_comma
		{}
	|	OVERLAY
			{ ldlex_expression (); }
		opt_exp_without_type opt_nocrossrefs opt_at opt_subalign
			{ ldlex_popstate (); ldlex_script (); }
		'{'
			{
			  lang_enter_overlay ($3, $6);
			}
		overlay_section
		'}'
			{ ldlex_popstate (); ldlex_expression (); }
		memspec_opt memspec_at_opt phdr_opt fill_opt
			{
			  ldlex_popstate ();
			  lang_leave_overlay ($5, (int) $4,
					      $16, $13, $15, $14);
			}
		opt_comma
	|	/* The GROUP case is just enough to support the gcc
		   svr3.ifile script.  It is not intended to be full
		   support.  I'm not even sure what GROUP is supposed
		   to mean.  */
		GROUP { ldlex_expression (); }
		opt_exp_with_type
		{
		  ldlex_popstate ();
		  lang_add_assignment (exp_assop ('=', ".", $3));
		}
		'{' sec_or_group_p1 '}'
	|	INCLUDE filename
		{ ldlex_script (); ldfile_open_command_file($2); }
		sec_or_group_p1 END
		{ ldlex_popstate (); }
	;

type:
	   NOLOAD  { sectype = noload_section; }
	|  DSECT   { sectype = noalloc_section; }
	|  COPY    { sectype = noalloc_section; }
	|  INFO    { sectype = noalloc_section; }
	|  OVERLAY { sectype = noalloc_section; }
	;

atype:
	 	'(' type ')'
  	| 	/* EMPTY */ { sectype = normal_section; }
  	| 	'(' ')' { sectype = normal_section; }
	;

opt_exp_with_type:
		exp atype ':'		{ $$ = $1; }
	|	atype ':'		{ $$ = (etree_type *)NULL;  }
	|	/* The BIND cases are to support the gcc svr3.ifile
		   script.  They aren't intended to implement full
		   support for the BIND keyword.  I'm not even sure
		   what BIND is supposed to mean.  */
		BIND '(' exp ')' atype ':' { $$ = $3; }
	|	BIND '(' exp ')' BLOCK '(' exp ')' atype ':'
		{ $$ = $3; }
	;

opt_exp_without_type:
		exp ':'		{ $$ = $1; }
	|	':'		{ $$ = (etree_type *) NULL;  }
	;

opt_nocrossrefs:
		/* empty */
			{ $$ = 0; }
	|	NOCROSSREFS
			{ $$ = 1; }
	;

memspec_opt:
		'>' NAME
		{ $$ = $2; }
	|	{ $$ = DEFAULT_MEMORY_REGION; }
	;

phdr_opt:
		/* empty */
		{
		  $$ = NULL;
		}
	|	phdr_opt ':' NAME
		{
		  struct lang_output_section_phdr_list *n;

		  n = ((struct lang_output_section_phdr_list *)
		       xmalloc (sizeof *n));
		  n->name = $3;
		  n->used = FALSE;
		  n->next = $1;
		  $$ = n;
		}
	;

overlay_section:
		/* empty */
	|	overlay_section
		NAME
			{
			  ldlex_script ();
			  lang_enter_overlay_section ($2);
			}
		'{' statement_list_opt '}'
			{ ldlex_popstate (); ldlex_expression (); }
		phdr_opt fill_opt
			{
			  ldlex_popstate ();
			  lang_leave_overlay_section ($9, $8);
			}
		opt_comma
	;

phdrs:
		PHDRS '{' phdr_list '}'
	;

phdr_list:
		/* empty */
	|	phdr_list phdr
	;

phdr:
		NAME { ldlex_expression (); }
		  phdr_type phdr_qualifiers { ldlex_popstate (); }
		  ';'
		{
		  lang_new_phdr ($1, $3, $4.filehdr, $4.phdrs, $4.at,
				 $4.flags);
		}
	;

phdr_type:
		exp
		{
		  $$ = $1;

		  if ($1->type.node_class == etree_name
		      && $1->type.node_code == NAME)
		    {
		      const char *s;
		      unsigned int i;
		      static const char * const phdr_types[] =
			{
			  "PT_NULL", "PT_LOAD", "PT_DYNAMIC",
			  "PT_INTERP", "PT_NOTE", "PT_SHLIB",
			  "PT_PHDR", "PT_TLS"
			};

		      s = $1->name.name;
		      for (i = 0;
			   i < sizeof phdr_types / sizeof phdr_types[0];
			   i++)
			if (strcmp (s, phdr_types[i]) == 0)
			  {
			    $$ = exp_intop (i);
			    break;
			  }
		      if (i == sizeof phdr_types / sizeof phdr_types[0])
			{
			  if (strcmp (s, "PT_GNU_EH_FRAME") == 0)
			    $$ = exp_intop (0x6474e550);
			  else if (strcmp (s, "PT_GNU_STACK") == 0)
			    $$ = exp_intop (0x6474e551);
			  else
			    {
			      einfo (_("\
%X%P:%S: unknown phdr type `%s' (try integer literal)\n"),
				     s);
			      $$ = exp_intop (0);
			    }
			}
		    }
		}
	;

phdr_qualifiers:
		/* empty */
		{
		  memset (&$$, 0, sizeof (struct phdr_info));
		}
	|	NAME phdr_val phdr_qualifiers
		{
		  $$ = $3;
		  if (strcmp ($1, "FILEHDR") == 0 && $2 == NULL)
		    $$.filehdr = TRUE;
		  else if (strcmp ($1, "PHDRS") == 0 && $2 == NULL)
		    $$.phdrs = TRUE;
		  else if (strcmp ($1, "FLAGS") == 0 && $2 != NULL)
		    $$.flags = $2;
		  else
		    einfo (_("%X%P:%S: PHDRS syntax error at `%s'\n"), $1);
		}
	|	AT '(' exp ')' phdr_qualifiers
		{
		  $$ = $5;
		  $$.at = $3;
		}
	;

phdr_val:
		/* empty */
		{
		  $$ = NULL;
		}
	| '(' exp ')'
		{
		  $$ = $2;
		}
	;

dynamic_list_file:
		{
		  ldlex_version_file ();
		  PUSH_ERROR (_("dynamic list"));
		}
		dynamic_list_nodes
		{
		  ldlex_popstate ();
		  POP_ERROR ();
		}
	;

dynamic_list_nodes:
		dynamic_list_node
	|	dynamic_list_nodes dynamic_list_node
	;

dynamic_list_node:
		'{' dynamic_list_tag '}' ';'
	;

dynamic_list_tag:
		vers_defns ';'
		{
		  lang_append_dynamic_list ($1);
		}
	;

/* This syntax is used within an external version script file.  */

version_script_file:
		{
		  ldlex_version_file ();
		  PUSH_ERROR (_("VERSION script"));
		}
		vers_nodes
		{
		  ldlex_popstate ();
		  POP_ERROR ();
		}
	;

/* This is used within a normal linker script file.  */

version:
		{
		  ldlex_version_script ();
		}
		VERSIONK '{' vers_nodes '}'
		{
		  ldlex_popstate ();
		}
	;

vers_nodes:
		vers_node
	|	vers_nodes vers_node
	;

vers_node:
		'{' vers_tag '}' ';'
		{
		  lang_register_vers_node (NULL, $2, NULL);
		}
	|	VERS_TAG '{' vers_tag '}' ';'
		{
		  lang_register_vers_node ($1, $3, NULL);
		}
	|	VERS_TAG '{' vers_tag '}' verdep ';'
		{
		  lang_register_vers_node ($1, $3, $5);
		}
	;

verdep:
		VERS_TAG
		{
		  $$ = lang_add_vers_depend (NULL, $1);
		}
	|	verdep VERS_TAG
		{
		  $$ = lang_add_vers_depend ($1, $2);
		}
	;

vers_tag:
		/* empty */
		{
		  $$ = lang_new_vers_node (NULL, NULL);
		}
	|	vers_defns ';'
		{
		  $$ = lang_new_vers_node ($1, NULL);
		}
	|	GLOBAL ':' vers_defns ';'
		{
		  $$ = lang_new_vers_node ($3, NULL);
		}
	|	LOCAL ':' vers_defns ';'
		{
		  $$ = lang_new_vers_node (NULL, $3);
		}
	|	GLOBAL ':' vers_defns ';' LOCAL ':' vers_defns ';'
		{
		  $$ = lang_new_vers_node ($3, $7);
		}
	;

vers_defns:
		VERS_IDENTIFIER
		{
		  $$ = lang_new_vers_pattern (NULL, $1, ldgram_vers_current_lang, FALSE);
		}
        |       NAME
		{
		  $$ = lang_new_vers_pattern (NULL, $1, ldgram_vers_current_lang, TRUE);
		}
	|	vers_defns ';' VERS_IDENTIFIER
		{
		  $$ = lang_new_vers_pattern ($1, $3, ldgram_vers_current_lang, FALSE);
		}
	|	vers_defns ';' NAME
		{
		  $$ = lang_new_vers_pattern ($1, $3, ldgram_vers_current_lang, TRUE);
		}
	|	vers_defns ';' EXTERN NAME '{'
			{
			  $<name>$ = ldgram_vers_current_lang;
			  ldgram_vers_current_lang = $4;
			}
		vers_defns opt_semicolon '}'
			{
			  struct bfd_elf_version_expr *pat;
			  for (pat = $7; pat->next != NULL; pat = pat->next);
			  pat->next = $1;
			  $$ = $7;
			  ldgram_vers_current_lang = $<name>6;
			}
	|	EXTERN NAME '{'
			{
			  $<name>$ = ldgram_vers_current_lang;
			  ldgram_vers_current_lang = $2;
			}
		vers_defns opt_semicolon '}'
			{
			  $$ = $5;
			  ldgram_vers_current_lang = $<name>4;
			}
	|	GLOBAL
		{
		  $$ = lang_new_vers_pattern (NULL, "global", ldgram_vers_current_lang, FALSE);
		}
	|	vers_defns ';' GLOBAL
		{
		  $$ = lang_new_vers_pattern ($1, "global", ldgram_vers_current_lang, FALSE);
		}
	|	LOCAL
		{
		  $$ = lang_new_vers_pattern (NULL, "local", ldgram_vers_current_lang, FALSE);
		}
	|	vers_defns ';' LOCAL
		{
		  $$ = lang_new_vers_pattern ($1, "local", ldgram_vers_current_lang, FALSE);
		}
	|	EXTERN
		{
		  $$ = lang_new_vers_pattern (NULL, "extern", ldgram_vers_current_lang, FALSE);
		}
	|	vers_defns ';' EXTERN
		{
		  $$ = lang_new_vers_pattern ($1, "extern", ldgram_vers_current_lang, FALSE);
		}
	;

opt_semicolon:
		/* empty */
	|	';'
	;

%%
void
yyerror(arg)
     const char *arg;
{
  if (ldfile_assumed_script)
    einfo (_("%P:%s: file format not recognized; treating as linker script\n"),
	   ldfile_input_filename);
  if (error_index > 0 && error_index < ERROR_NAME_MAX)
     einfo ("%P%F:%S: %s in %s\n", arg, error_names[error_index-1]);
  else
     einfo ("%P%F:%S: %s\n", arg);
}