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configure: Regenerate.
[binutils.git] / ld / ldgram.y
blob23151d8f6b09f4a53974390f1b14bb87b21779f8
1 /* A YACC grammar to parse a superset of the AT&T linker scripting language.
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
4 Written by Steve Chamberlain of Cygnus Support (steve@cygnus.com).
5
6 This file is part of GNU ld.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program 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 this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21
22 %{
23 /*
24
25 */
26
27 #define DONTDECLARE_MALLOC
28
29 #include "bfd.h"
30 #include "sysdep.h"
31 #include "bfdlink.h"
32 #include "ld.h"
33 #include "ldexp.h"
34 #include "ldver.h"
35 #include "ldlang.h"
36 #include "ldfile.h"
37 #include "ldemul.h"
38 #include "ldmisc.h"
39 #include "ldmain.h"
40 #include "mri.h"
41 #include "ldctor.h"
42 #include "ldlex.h"
43
44 #ifndef YYDEBUG
45 #define YYDEBUG 1
46 #endif
47
48 static enum section_type sectype;
49
50 lang_memory_region_type *region;
51
52 bfd_boolean ldgram_want_filename = TRUE;
53 FILE *saved_script_handle = NULL;
54 bfd_boolean force_make_executable = FALSE;
55
56 bfd_boolean ldgram_in_script = FALSE;
57 bfd_boolean ldgram_had_equals = FALSE;
58 bfd_boolean ldgram_had_keep = FALSE;
59 char *ldgram_vers_current_lang = NULL;
60
61 #define ERROR_NAME_MAX 20
62 static char *error_names[ERROR_NAME_MAX];
63 static int error_index;
64 #define PUSH_ERROR(x) if (error_index < ERROR_NAME_MAX) error_names[error_index] = x; error_index++;
65 #define POP_ERROR() error_index--;
66 %}
67 %union {
68 bfd_vma integer;
69 struct big_int
70 {
71 bfd_vma integer;
72 char *str;
73 } bigint;
74 fill_type *fill;
75 char *name;
76 const char *cname;
77 struct wildcard_spec wildcard;
78 struct wildcard_list *wildcard_list;
79 struct name_list *name_list;
80 int token;
81 union etree_union *etree;
82 struct phdr_info
83 {
84 bfd_boolean filehdr;
85 bfd_boolean phdrs;
86 union etree_union *at;
87 union etree_union *flags;
88 } phdr;
89 struct lang_nocrossref *nocrossref;
90 struct lang_output_section_phdr_list *section_phdr;
91 struct bfd_elf_version_deps *deflist;
92 struct bfd_elf_version_expr *versyms;
93 struct bfd_elf_version_tree *versnode;
94 }
95
96 %type <etree> exp opt_exp_with_type mustbe_exp opt_at phdr_type phdr_val
97 %type <etree> opt_exp_without_type opt_subalign
98 %type <fill> fill_opt fill_exp
99 %type <name_list> exclude_name_list
100 %type <wildcard_list> file_NAME_list
101 %type <name> memspec_opt casesymlist
102 %type <name> memspec_at_opt
103 %type <cname> wildcard_name
104 %type <wildcard> wildcard_spec
105 %token <bigint> INT
106 %token <name> NAME LNAME
107 %type <integer> length
108 %type <phdr> phdr_qualifiers
109 %type <nocrossref> nocrossref_list
110 %type <section_phdr> phdr_opt
111 %type <integer> opt_nocrossrefs
112
113 %right <token> PLUSEQ MINUSEQ MULTEQ DIVEQ '=' LSHIFTEQ RSHIFTEQ ANDEQ OREQ
114 %right <token> '?' ':'
115 %left <token> OROR
116 %left <token> ANDAND
117 %left <token> '|'
118 %left <token> '^'
119 %left <token> '&'
120 %left <token> EQ NE
121 %left <token> '<' '>' LE GE
122 %left <token> LSHIFT RSHIFT
123
124 %left <token> '+' '-'
125 %left <token> '*' '/' '%'
126
127 %right UNARY
128 %token END
129 %left <token> '('
130 %token <token> ALIGN_K BLOCK BIND QUAD SQUAD LONG SHORT BYTE
131 %token SECTIONS PHDRS DATA_SEGMENT_ALIGN DATA_SEGMENT_RELRO_END DATA_SEGMENT_END
132 %token SORT_BY_NAME SORT_BY_ALIGNMENT
133 %token '{' '}'
134 %token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH
135 %token INHIBIT_COMMON_ALLOCATION
136 %token SIZEOF_HEADERS
137 %token SEGMENT_START
138 %token INCLUDE
139 %token MEMORY DEFSYMEND
140 %token NOLOAD DSECT COPY INFO OVERLAY
141 %token NAME LNAME DEFINED TARGET_K SEARCH_DIR MAP ENTRY
142 %token <integer> NEXT
143 %token SIZEOF ADDR LOADADDR MAX_K MIN_K
144 %token STARTUP HLL SYSLIB FLOAT NOFLOAT NOCROSSREFS
145 %token ORIGIN FILL
146 %token LENGTH CREATE_OBJECT_SYMBOLS INPUT GROUP OUTPUT CONSTRUCTORS
147 %token ALIGNMOD AT SUBALIGN PROVIDE AS_NEEDED
148 %type <token> assign_op atype attributes_opt sect_constraint
149 %type <name> filename
150 %token CHIP LIST SECT ABSOLUTE LOAD NEWLINE ENDWORD ORDER NAMEWORD ASSERT_K
151 %token FORMAT PUBLIC DEFSYMEND BASE ALIAS TRUNCATE REL
152 %token INPUT_SCRIPT INPUT_MRI_SCRIPT INPUT_DEFSYM CASE EXTERN START
153 %token <name> VERS_TAG VERS_IDENTIFIER
154 %token GLOBAL LOCAL VERSIONK INPUT_VERSION_SCRIPT
155 %token KEEP ONLY_IF_RO ONLY_IF_RW
156 %token EXCLUDE_FILE
157 %type <versyms> vers_defns
158 %type <versnode> vers_tag
159 %type <deflist> verdep
160
161 %%
162
163 file:
164 INPUT_SCRIPT script_file
165 | INPUT_MRI_SCRIPT mri_script_file
166 | INPUT_VERSION_SCRIPT version_script_file
167 | INPUT_DEFSYM defsym_expr
168 ;
169
170
171 filename: NAME;
172
173
174 defsym_expr:
175 { ldlex_defsym(); }
176 NAME '=' exp
177 {
178 ldlex_popstate();
179 lang_add_assignment(exp_assop($3,$2,$4));
180 }
181 ;
182
183 /* SYNTAX WITHIN AN MRI SCRIPT FILE */
184 mri_script_file:
185 {
186 ldlex_mri_script ();
187 PUSH_ERROR (_("MRI style script"));
188 }
189 mri_script_lines
190 {
191 ldlex_popstate ();
192 mri_draw_tree ();
193 POP_ERROR ();
194 }
195 ;
196
197 mri_script_lines:
198 mri_script_lines mri_script_command NEWLINE
199 |
200 ;
201
202 mri_script_command:
203 CHIP exp
204 | CHIP exp ',' exp
205 | NAME {
206 einfo(_("%P%F: unrecognised keyword in MRI style script '%s'\n"),$1);
207 }
208 | LIST {
209 config.map_filename = "-";
210 }
211 | ORDER ordernamelist
212 | ENDWORD
213 | PUBLIC NAME '=' exp
214 { mri_public($2, $4); }
215 | PUBLIC NAME ',' exp
216 { mri_public($2, $4); }
217 | PUBLIC NAME exp
218 { mri_public($2, $3); }
219 | FORMAT NAME
220 { mri_format($2); }
221 | SECT NAME ',' exp
222 { mri_output_section($2, $4);}
223 | SECT NAME exp
224 { mri_output_section($2, $3);}
225 | SECT NAME '=' exp
226 { mri_output_section($2, $4);}
227 | ALIGN_K NAME '=' exp
228 { mri_align($2,$4); }
229 | ALIGN_K NAME ',' exp
230 { mri_align($2,$4); }
231 | ALIGNMOD NAME '=' exp
232 { mri_alignmod($2,$4); }
233 | ALIGNMOD NAME ',' exp
234 { mri_alignmod($2,$4); }
235 | ABSOLUTE mri_abs_name_list
236 | LOAD mri_load_name_list
237 | NAMEWORD NAME
238 { mri_name($2); }
239 | ALIAS NAME ',' NAME
240 { mri_alias($2,$4,0);}
241 | ALIAS NAME ',' INT
242 { mri_alias ($2, 0, (int) $4.integer); }
243 | BASE exp
244 { mri_base($2); }
245 | TRUNCATE INT
246 { mri_truncate ((unsigned int) $2.integer); }
247 | CASE casesymlist
248 | EXTERN extern_name_list
249 | INCLUDE filename
250 { ldlex_script (); ldfile_open_command_file($2); }
251 mri_script_lines END
252 { ldlex_popstate (); }
253 | START NAME
254 { lang_add_entry ($2, FALSE); }
255 |
256 ;
257
258 ordernamelist:
259 ordernamelist ',' NAME { mri_order($3); }
260 | ordernamelist NAME { mri_order($2); }
261 |
262 ;
263
264 mri_load_name_list:
265 NAME
266 { mri_load($1); }
267 | mri_load_name_list ',' NAME { mri_load($3); }
268 ;
269
270 mri_abs_name_list:
271 NAME
272 { mri_only_load($1); }
273 | mri_abs_name_list ',' NAME
274 { mri_only_load($3); }
275 ;
276
277 casesymlist:
278 /* empty */ { $$ = NULL; }
279 | NAME
280 | casesymlist ',' NAME
281 ;
282
283 extern_name_list:
284 NAME
285 { ldlang_add_undef ($1); }
286 | extern_name_list NAME
287 { ldlang_add_undef ($2); }
288 | extern_name_list ',' NAME
289 { ldlang_add_undef ($3); }
290 ;
291
292 script_file:
293 {
294 ldlex_both();
295 }
296 ifile_list
297 {
298 ldlex_popstate();
299 }
300 ;
301
302
303 ifile_list:
304 ifile_list ifile_p1
305 |
306 ;
307
308
309
310 ifile_p1:
311 memory
312 | sections
313 | phdrs
314 | startup
315 | high_level_library
316 | low_level_library
317 | floating_point_support
318 | statement_anywhere
319 | version
320 | ';'
321 | TARGET_K '(' NAME ')'
322 { lang_add_target($3); }
323 | SEARCH_DIR '(' filename ')'
324 { ldfile_add_library_path ($3, FALSE); }
325 | OUTPUT '(' filename ')'
326 { lang_add_output($3, 1); }
327 | OUTPUT_FORMAT '(' NAME ')'
328 { lang_add_output_format ($3, (char *) NULL,
329 (char *) NULL, 1); }
330 | OUTPUT_FORMAT '(' NAME ',' NAME ',' NAME ')'
331 { lang_add_output_format ($3, $5, $7, 1); }
332 | OUTPUT_ARCH '(' NAME ')'
333 { ldfile_set_output_arch ($3, bfd_arch_unknown); }
334 | FORCE_COMMON_ALLOCATION
335 { command_line.force_common_definition = TRUE ; }
336 | INHIBIT_COMMON_ALLOCATION
337 { command_line.inhibit_common_definition = TRUE ; }
338 | INPUT '(' input_list ')'
339 | GROUP
340 { lang_enter_group (); }
341 '(' input_list ')'
342 { lang_leave_group (); }
343 | MAP '(' filename ')'
344 { lang_add_map($3); }
345 | INCLUDE filename
346 { ldlex_script (); ldfile_open_command_file($2); }
347 ifile_list END
348 { ldlex_popstate (); }
349 | NOCROSSREFS '(' nocrossref_list ')'
350 {
351 lang_add_nocrossref ($3);
352 }
353 | EXTERN '(' extern_name_list ')'
354 ;
355
356 input_list:
357 NAME
358 { lang_add_input_file($1,lang_input_file_is_search_file_enum,
359 (char *)NULL); }
360 | input_list ',' NAME
361 { lang_add_input_file($3,lang_input_file_is_search_file_enum,
362 (char *)NULL); }
363 | input_list NAME
364 { lang_add_input_file($2,lang_input_file_is_search_file_enum,
365 (char *)NULL); }
366 | LNAME
367 { lang_add_input_file($1,lang_input_file_is_l_enum,
368 (char *)NULL); }
369 | input_list ',' LNAME
370 { lang_add_input_file($3,lang_input_file_is_l_enum,
371 (char *)NULL); }
372 | input_list LNAME
373 { lang_add_input_file($2,lang_input_file_is_l_enum,
374 (char *)NULL); }
375 | AS_NEEDED '('
376 { $<integer>$ = as_needed; as_needed = TRUE; }
377 input_list ')'
378 { as_needed = $<integer>3; }
379 | input_list ',' AS_NEEDED '('
380 { $<integer>$ = as_needed; as_needed = TRUE; }
381 input_list ')'
382 { as_needed = $<integer>5; }
383 | input_list AS_NEEDED '('
384 { $<integer>$ = as_needed; as_needed = TRUE; }
385 input_list ')'
386 { as_needed = $<integer>4; }
387 ;
388
389 sections:
390 SECTIONS '{' sec_or_group_p1 '}'
391 ;
392
393 sec_or_group_p1:
394 sec_or_group_p1 section
395 | sec_or_group_p1 statement_anywhere
396 |
397 ;
398
399 statement_anywhere:
400 ENTRY '(' NAME ')'
401 { lang_add_entry ($3, FALSE); }
402 | assignment end
403 | ASSERT_K {ldlex_expression ();} '(' exp ',' NAME ')'
404 { ldlex_popstate ();
405 lang_add_assignment (exp_assert ($4, $6)); }
406 ;
407
408 /* The '*' and '?' cases are there because the lexer returns them as
409 separate tokens rather than as NAME. */
410 wildcard_name:
411 NAME
412 {
413 $$ = $1;
414 }
415 | '*'
416 {
417 $$ = "*";
418 }
419 | '?'
420 {
421 $$ = "?";
422 }
423 ;
424
425 wildcard_spec:
426 wildcard_name
427 {
428 $$.name = $1;
429 $$.sorted = none;
430 $$.exclude_name_list = NULL;
431 }
432 | EXCLUDE_FILE '(' exclude_name_list ')' wildcard_name
433 {
434 $$.name = $5;
435 $$.sorted = none;
436 $$.exclude_name_list = $3;
437 }
438 | SORT_BY_NAME '(' wildcard_name ')'
439 {
440 $$.name = $3;
441 $$.sorted = by_name;
442 $$.exclude_name_list = NULL;
443 }
444 | SORT_BY_ALIGNMENT '(' wildcard_name ')'
445 {
446 $$.name = $3;
447 $$.sorted = by_alignment;
448 $$.exclude_name_list = NULL;
449 }
450 | SORT_BY_NAME '(' SORT_BY_ALIGNMENT '(' wildcard_name ')' ')'
451 {
452 $$.name = $5;
453 $$.sorted = by_name_alignment;
454 $$.exclude_name_list = NULL;
455 }
456 | SORT_BY_NAME '(' SORT_BY_NAME '(' wildcard_name ')' ')'
457 {
458 $$.name = $5;
459 $$.sorted = by_name;
460 $$.exclude_name_list = NULL;
461 }
462 | SORT_BY_ALIGNMENT '(' SORT_BY_NAME '(' wildcard_name ')' ')'
463 {
464 $$.name = $5;
465 $$.sorted = by_alignment_name;
466 $$.exclude_name_list = NULL;
467 }
468 | SORT_BY_ALIGNMENT '(' SORT_BY_ALIGNMENT '(' wildcard_name ')' ')'
469 {
470 $$.name = $5;
471 $$.sorted = by_alignment;
472 $$.exclude_name_list = NULL;
473 }
474 | SORT_BY_NAME '(' EXCLUDE_FILE '(' exclude_name_list ')' wildcard_name ')'
475 {
476 $$.name = $7;
477 $$.sorted = by_name;
478 $$.exclude_name_list = $5;
479 }
480 ;
481
482 exclude_name_list:
483 exclude_name_list wildcard_name
484 {
485 struct name_list *tmp;
486 tmp = (struct name_list *) xmalloc (sizeof *tmp);
487 tmp->name = $2;
488 tmp->next = $1;
489 $$ = tmp;
490 }
491 |
492 wildcard_name
493 {
494 struct name_list *tmp;
495 tmp = (struct name_list *) xmalloc (sizeof *tmp);
496 tmp->name = $1;
497 tmp->next = NULL;
498 $$ = tmp;
499 }
500 ;
501
502 file_NAME_list:
503 file_NAME_list opt_comma wildcard_spec
504 {
505 struct wildcard_list *tmp;
506 tmp = (struct wildcard_list *) xmalloc (sizeof *tmp);
507 tmp->next = $1;
508 tmp->spec = $3;
509 $$ = tmp;
510 }
511 |
512 wildcard_spec
513 {
514 struct wildcard_list *tmp;
515 tmp = (struct wildcard_list *) xmalloc (sizeof *tmp);
516 tmp->next = NULL;
517 tmp->spec = $1;
518 $$ = tmp;
519 }
520 ;
521
522 input_section_spec_no_keep:
523 NAME
524 {
525 struct wildcard_spec tmp;
526 tmp.name = $1;
527 tmp.exclude_name_list = NULL;
528 tmp.sorted = none;
529 lang_add_wild (&tmp, NULL, ldgram_had_keep);
530 }
531 | '[' file_NAME_list ']'
532 {
533 lang_add_wild (NULL, $2, ldgram_had_keep);
534 }
535 | wildcard_spec '(' file_NAME_list ')'
536 {
537 lang_add_wild (&$1, $3, ldgram_had_keep);
538 }
539 ;
540
541 input_section_spec:
542 input_section_spec_no_keep
543 | KEEP '('
544 { ldgram_had_keep = TRUE; }
545 input_section_spec_no_keep ')'
546 { ldgram_had_keep = FALSE; }
547 ;
548
549 statement:
550 assignment end
551 | CREATE_OBJECT_SYMBOLS
552 {
553 lang_add_attribute(lang_object_symbols_statement_enum);
554 }
555 | ';'
556 | CONSTRUCTORS
557 {
558
559 lang_add_attribute(lang_constructors_statement_enum);
560 }
561 | SORT_BY_NAME '(' CONSTRUCTORS ')'
562 {
563 constructors_sorted = TRUE;
564 lang_add_attribute (lang_constructors_statement_enum);
565 }
566 | input_section_spec
567 | length '(' mustbe_exp ')'
568 {
569 lang_add_data ((int) $1, $3);
570 }
571
572 | FILL '(' fill_exp ')'
573 {
574 lang_add_fill ($3);
575 }
576 ;
577
578 statement_list:
579 statement_list statement
580 | statement
581 ;
582
583 statement_list_opt:
584 /* empty */
585 | statement_list
586 ;
587
588 length:
589 QUAD
590 { $$ = $1; }
591 | SQUAD
592 { $$ = $1; }
593 | LONG
594 { $$ = $1; }
595 | SHORT
596 { $$ = $1; }
597 | BYTE
598 { $$ = $1; }
599 ;
600
601 fill_exp:
602 mustbe_exp
603 {
604 $$ = exp_get_fill ($1,
605 0,
606 "fill value",
607 lang_first_phase_enum);
608 }
609 ;
610
611 fill_opt:
612 '=' fill_exp
613 { $$ = $2; }
614 | { $$ = (fill_type *) 0; }
615 ;
616
617 assign_op:
618 PLUSEQ
619 { $$ = '+'; }
620 | MINUSEQ
621 { $$ = '-'; }
622 | MULTEQ
623 { $$ = '*'; }
624 | DIVEQ
625 { $$ = '/'; }
626 | LSHIFTEQ
627 { $$ = LSHIFT; }
628 | RSHIFTEQ
629 { $$ = RSHIFT; }
630 | ANDEQ
631 { $$ = '&'; }
632 | OREQ
633 { $$ = '|'; }
634
635 ;
636
637 end: ';' | ','
638 ;
639
640
641 assignment:
642 NAME '=' mustbe_exp
643 {
644 lang_add_assignment (exp_assop ($2, $1, $3));
645 }
646 | NAME assign_op mustbe_exp
647 {
648 lang_add_assignment (exp_assop ('=', $1,
649 exp_binop ($2,
650 exp_nameop (NAME,
651 $1),
652 $3)));
653 }
654 | PROVIDE '(' NAME '=' mustbe_exp ')'
655 {
656 lang_add_assignment (exp_provide ($3, $5));
657 }
658 ;
659
660
661 opt_comma:
662 ',' | ;
663
664
665 memory:
666 MEMORY '{' memory_spec memory_spec_list '}'
667 ;
668
669 memory_spec_list:
670 memory_spec_list memory_spec
671 | memory_spec_list ',' memory_spec
672 |
673 ;
674
675
676 memory_spec: NAME
677 { region = lang_memory_region_lookup ($1, TRUE); }
678 attributes_opt ':'
679 origin_spec opt_comma length_spec
680 {}
681 ;
682
683 origin_spec:
684 ORIGIN '=' mustbe_exp
685 { region->current =
686 region->origin =
687 exp_get_vma($3, 0L,"origin", lang_first_phase_enum);
688 }
689 ;
690
691 length_spec:
692 LENGTH '=' mustbe_exp
693 { region->length = exp_get_vma($3,
694 ~((bfd_vma)0),
695 "length",
696 lang_first_phase_enum);
697 }
698 ;
699
700 attributes_opt:
701 /* empty */
702 { /* dummy action to avoid bison 1.25 error message */ }
703 | '(' attributes_list ')'
704 ;
705
706 attributes_list:
707 attributes_string
708 | attributes_list attributes_string
709 ;
710
711 attributes_string:
712 NAME
713 { lang_set_flags (region, $1, 0); }
714 | '!' NAME
715 { lang_set_flags (region, $2, 1); }
716 ;
717
718 startup:
719 STARTUP '(' filename ')'
720 { lang_startup($3); }
721 ;
722
723 high_level_library:
724 HLL '(' high_level_library_NAME_list ')'
725 | HLL '(' ')'
726 { ldemul_hll((char *)NULL); }
727 ;
728
729 high_level_library_NAME_list:
730 high_level_library_NAME_list opt_comma filename
731 { ldemul_hll($3); }
732 | filename
733 { ldemul_hll($1); }
734
735 ;
736
737 low_level_library:
738 SYSLIB '(' low_level_library_NAME_list ')'
739 ; low_level_library_NAME_list:
740 low_level_library_NAME_list opt_comma filename
741 { ldemul_syslib($3); }
742 |
743 ;
744
745 floating_point_support:
746 FLOAT
747 { lang_float(TRUE); }
748 | NOFLOAT
749 { lang_float(FALSE); }
750 ;
751
752 nocrossref_list:
753 /* empty */
754 {
755 $$ = NULL;
756 }
757 | NAME nocrossref_list
758 {
759 struct lang_nocrossref *n;
760
761 n = (struct lang_nocrossref *) xmalloc (sizeof *n);
762 n->name = $1;
763 n->next = $2;
764 $$ = n;
765 }
766 | NAME ',' nocrossref_list
767 {
768 struct lang_nocrossref *n;
769
770 n = (struct lang_nocrossref *) xmalloc (sizeof *n);
771 n->name = $1;
772 n->next = $3;
773 $$ = n;
774 }
775 ;
776
777 mustbe_exp: { ldlex_expression (); }
778 exp
779 { ldlex_popstate (); $$=$2;}
780 ;
781
782 exp :
783 '-' exp %prec UNARY
784 { $$ = exp_unop ('-', $2); }
785 | '(' exp ')'
786 { $$ = $2; }
787 | NEXT '(' exp ')' %prec UNARY
788 { $$ = exp_unop ((int) $1,$3); }
789 | '!' exp %prec UNARY
790 { $$ = exp_unop ('!', $2); }
791 | '+' exp %prec UNARY
792 { $$ = $2; }
793 | '~' exp %prec UNARY
794 { $$ = exp_unop ('~', $2);}
795
796 | exp '*' exp
797 { $$ = exp_binop ('*', $1, $3); }
798 | exp '/' exp
799 { $$ = exp_binop ('/', $1, $3); }
800 | exp '%' exp
801 { $$ = exp_binop ('%', $1, $3); }
802 | exp '+' exp
803 { $$ = exp_binop ('+', $1, $3); }
804 | exp '-' exp
805 { $$ = exp_binop ('-' , $1, $3); }
806 | exp LSHIFT exp
807 { $$ = exp_binop (LSHIFT , $1, $3); }
808 | exp RSHIFT exp
809 { $$ = exp_binop (RSHIFT , $1, $3); }
810 | exp EQ exp
811 { $$ = exp_binop (EQ , $1, $3); }
812 | exp NE exp
813 { $$ = exp_binop (NE , $1, $3); }
814 | exp LE exp
815 { $$ = exp_binop (LE , $1, $3); }
816 | exp GE exp
817 { $$ = exp_binop (GE , $1, $3); }
818 | exp '<' exp
819 { $$ = exp_binop ('<' , $1, $3); }
820 | exp '>' exp
821 { $$ = exp_binop ('>' , $1, $3); }
822 | exp '&' exp
823 { $$ = exp_binop ('&' , $1, $3); }
824 | exp '^' exp
825 { $$ = exp_binop ('^' , $1, $3); }
826 | exp '|' exp
827 { $$ = exp_binop ('|' , $1, $3); }
828 | exp '?' exp ':' exp
829 { $$ = exp_trinop ('?' , $1, $3, $5); }
830 | exp ANDAND exp
831 { $$ = exp_binop (ANDAND , $1, $3); }
832 | exp OROR exp
833 { $$ = exp_binop (OROR , $1, $3); }
834 | DEFINED '(' NAME ')'
835 { $$ = exp_nameop (DEFINED, $3); }
836 | INT
837 { $$ = exp_bigintop ($1.integer, $1.str); }
838 | SIZEOF_HEADERS
839 { $$ = exp_nameop (SIZEOF_HEADERS,0); }
840
841 | SIZEOF '(' NAME ')'
842 { $$ = exp_nameop (SIZEOF,$3); }
843 | ADDR '(' NAME ')'
844 { $$ = exp_nameop (ADDR,$3); }
845 | LOADADDR '(' NAME ')'
846 { $$ = exp_nameop (LOADADDR,$3); }
847 | ABSOLUTE '(' exp ')'
848 { $$ = exp_unop (ABSOLUTE, $3); }
849 | ALIGN_K '(' exp ')'
850 { $$ = exp_unop (ALIGN_K,$3); }
851 | ALIGN_K '(' exp ',' exp ')'
852 { $$ = exp_binop (ALIGN_K,$3,$5); }
853 | DATA_SEGMENT_ALIGN '(' exp ',' exp ')'
854 { $$ = exp_binop (DATA_SEGMENT_ALIGN, $3, $5); }
855 | DATA_SEGMENT_RELRO_END '(' exp ',' exp ')'
856 { $$ = exp_binop (DATA_SEGMENT_RELRO_END, $5, $3); }
857 | DATA_SEGMENT_END '(' exp ')'
858 { $$ = exp_unop (DATA_SEGMENT_END, $3); }
859 | SEGMENT_START '(' NAME ',' exp ')'
860 { /* The operands to the expression node are
861 placed in the opposite order from the way
862 in which they appear in the script as
863 that allows us to reuse more code in
864 fold_binary. */
865 $$ = exp_binop (SEGMENT_START,
866 $5,
867 exp_nameop (NAME, $3)); }
868 | BLOCK '(' exp ')'
869 { $$ = exp_unop (ALIGN_K,$3); }
870 | NAME
871 { $$ = exp_nameop (NAME,$1); }
872 | MAX_K '(' exp ',' exp ')'
873 { $$ = exp_binop (MAX_K, $3, $5 ); }
874 | MIN_K '(' exp ',' exp ')'
875 { $$ = exp_binop (MIN_K, $3, $5 ); }
876 | ASSERT_K '(' exp ',' NAME ')'
877 { $$ = exp_assert ($3, $5); }
878 | ORIGIN '(' NAME ')'
879 { $$ = exp_nameop (ORIGIN, $3); }
880 | LENGTH '(' NAME ')'
881 { $$ = exp_nameop (LENGTH, $3); }
882 ;
883
884
885 memspec_at_opt:
886 AT '>' NAME { $$ = $3; }
887 | { $$ = 0; }
888 ;
889
890 opt_at:
891 AT '(' exp ')' { $$ = $3; }
892 | { $$ = 0; }
893 ;
894
895 opt_subalign:
896 SUBALIGN '(' exp ')' { $$ = $3; }
897 | { $$ = 0; }
898 ;
899
900 sect_constraint:
901 ONLY_IF_RO { $$ = ONLY_IF_RO; }
902 | ONLY_IF_RW { $$ = ONLY_IF_RW; }
903 | { $$ = 0; }
904 ;
905
906 section: NAME { ldlex_expression(); }
907 opt_exp_with_type
908 opt_at
909 opt_subalign { ldlex_popstate (); ldlex_script (); }
910 sect_constraint
911 '{'
912 {
913 lang_enter_output_section_statement($1, $3,
914 sectype,
915 0, $5, $4, $7);
916 }
917 statement_list_opt
918 '}' { ldlex_popstate (); ldlex_expression (); }
919 memspec_opt memspec_at_opt phdr_opt fill_opt
920 {
921 ldlex_popstate ();
922 lang_leave_output_section_statement ($16, $13, $15, $14);
923 }
924 opt_comma
925 {}
926 | OVERLAY
927 { ldlex_expression (); }
928 opt_exp_without_type opt_nocrossrefs opt_at opt_subalign
929 { ldlex_popstate (); ldlex_script (); }
930 '{'
931 {
932 lang_enter_overlay ($3, $6);
933 }
934 overlay_section
935 '}'
936 { ldlex_popstate (); ldlex_expression (); }
937 memspec_opt memspec_at_opt phdr_opt fill_opt
938 {
939 ldlex_popstate ();
940 lang_leave_overlay ($5, (int) $4,
941 $16, $13, $15, $14);
942 }
943 opt_comma
944 | /* The GROUP case is just enough to support the gcc
945 svr3.ifile script. It is not intended to be full
946 support. I'm not even sure what GROUP is supposed
947 to mean. */
948 GROUP { ldlex_expression (); }
949 opt_exp_with_type
950 {
951 ldlex_popstate ();
952 lang_add_assignment (exp_assop ('=', ".", $3));
953 }
954 '{' sec_or_group_p1 '}'
955 ;
956
957 type:
958 NOLOAD { sectype = noload_section; }
959 | DSECT { sectype = dsect_section; }
960 | COPY { sectype = copy_section; }
961 | INFO { sectype = info_section; }
962 | OVERLAY { sectype = overlay_section; }
963 ;
964
965 atype:
966 '(' type ')'
967 | /* EMPTY */ { sectype = normal_section; }
968 | '(' ')' { sectype = normal_section; }
969 ;
970
971 opt_exp_with_type:
972 exp atype ':' { $$ = $1; }
973 | atype ':' { $$ = (etree_type *)NULL; }
974 | /* The BIND cases are to support the gcc svr3.ifile
975 script. They aren't intended to implement full
976 support for the BIND keyword. I'm not even sure
977 what BIND is supposed to mean. */
978 BIND '(' exp ')' atype ':' { $$ = $3; }
979 | BIND '(' exp ')' BLOCK '(' exp ')' atype ':'
980 { $$ = $3; }
981 ;
982
983 opt_exp_without_type:
984 exp ':' { $$ = $1; }
985 | ':' { $$ = (etree_type *) NULL; }
986 ;
987
988 opt_nocrossrefs:
989 /* empty */
990 { $$ = 0; }
991 | NOCROSSREFS
992 { $$ = 1; }
993 ;
994
995 memspec_opt:
996 '>' NAME
997 { $$ = $2; }
998 | { $$ = DEFAULT_MEMORY_REGION; }
999 ;
1000
1001 phdr_opt:
1002 /* empty */
1003 {
1004 $$ = NULL;
1005 }
1006 | phdr_opt ':' NAME
1007 {
1008 struct lang_output_section_phdr_list *n;
1009
1010 n = ((struct lang_output_section_phdr_list *)
1011 xmalloc (sizeof *n));
1012 n->name = $3;
1013 n->used = FALSE;
1014 n->next = $1;
1015 $$ = n;
1016 }
1017 ;
1018
1019 overlay_section:
1020 /* empty */
1021 | overlay_section
1022 NAME
1023 {
1024 ldlex_script ();
1025 lang_enter_overlay_section ($2);
1026 }
1027 '{' statement_list_opt '}'
1028 { ldlex_popstate (); ldlex_expression (); }
1029 phdr_opt fill_opt
1030 {
1031 ldlex_popstate ();
1032 lang_leave_overlay_section ($9, $8);
1033 }
1034 opt_comma
1035 ;
1036
1037 phdrs:
1038 PHDRS '{' phdr_list '}'
1039 ;
1040
1041 phdr_list:
1042 /* empty */
1043 | phdr_list phdr
1044 ;
1045
1046 phdr:
1047 NAME { ldlex_expression (); }
1048 phdr_type phdr_qualifiers { ldlex_popstate (); }
1049 ';'
1050 {
1051 lang_new_phdr ($1, $3, $4.filehdr, $4.phdrs, $4.at,
1052 $4.flags);
1053 }
1054 ;
1055
1056 phdr_type:
1057 exp
1058 {
1059 $$ = $1;
1060
1061 if ($1->type.node_class == etree_name
1062 && $1->type.node_code == NAME)
1063 {
1064 const char *s;
1065 unsigned int i;
1066 static const char * const phdr_types[] =
1067 {
1068 "PT_NULL", "PT_LOAD", "PT_DYNAMIC",
1069 "PT_INTERP", "PT_NOTE", "PT_SHLIB",
1070 "PT_PHDR", "PT_TLS"
1071 };
1072
1073 s = $1->name.name;
1074 for (i = 0;
1075 i < sizeof phdr_types / sizeof phdr_types[0];
1076 i++)
1077 if (strcmp (s, phdr_types[i]) == 0)
1078 {
1079 $$ = exp_intop (i);
1080 break;
1081 }
1082 if (i == sizeof phdr_types / sizeof phdr_types[0])
1083 {
1084 if (strcmp (s, "PT_GNU_EH_FRAME") == 0)
1085 $$ = exp_intop (0x6474e550);
1086 else if (strcmp (s, "PT_GNU_STACK") == 0)
1087 $$ = exp_intop (0x6474e551);
1088 else
1089 {
1090 einfo (_("\
1091 %X%P:%S: unknown phdr type `%s' (try integer literal)\n"),
1092 s);
1093 $$ = exp_intop (0);
1094 }
1095 }
1096 }
1097 }
1098 ;
1099
1100 phdr_qualifiers:
1101 /* empty */
1102 {
1103 memset (&$$, 0, sizeof (struct phdr_info));
1104 }
1105 | NAME phdr_val phdr_qualifiers
1106 {
1107 $$ = $3;
1108 if (strcmp ($1, "FILEHDR") == 0 && $2 == NULL)
1109 $$.filehdr = TRUE;
1110 else if (strcmp ($1, "PHDRS") == 0 && $2 == NULL)
1111 $$.phdrs = TRUE;
1112 else if (strcmp ($1, "FLAGS") == 0 && $2 != NULL)
1113 $$.flags = $2;
1114 else
1115 einfo (_("%X%P:%S: PHDRS syntax error at `%s'\n"), $1);
1116 }
1117 | AT '(' exp ')' phdr_qualifiers
1118 {
1119 $$ = $5;
1120 $$.at = $3;
1121 }
1122 ;
1123
1124 phdr_val:
1125 /* empty */
1126 {
1127 $$ = NULL;
1128 }
1129 | '(' exp ')'
1130 {
1131 $$ = $2;
1132 }
1133 ;
1134
1135 /* This syntax is used within an external version script file. */
1136
1137 version_script_file:
1138 {
1139 ldlex_version_file ();
1140 PUSH_ERROR (_("VERSION script"));
1141 }
1142 vers_nodes
1143 {
1144 ldlex_popstate ();
1145 POP_ERROR ();
1146 }
1147 ;
1148
1149 /* This is used within a normal linker script file. */
1150
1151 version:
1152 {
1153 ldlex_version_script ();
1154 }
1155 VERSIONK '{' vers_nodes '}'
1156 {
1157 ldlex_popstate ();
1158 }
1159 ;
1160
1161 vers_nodes:
1162 vers_node
1163 | vers_nodes vers_node
1164 ;
1165
1166 vers_node:
1167 '{' vers_tag '}' ';'
1168 {
1169 lang_register_vers_node (NULL, $2, NULL);
1170 }
1171 | VERS_TAG '{' vers_tag '}' ';'
1172 {
1173 lang_register_vers_node ($1, $3, NULL);
1174 }
1175 | VERS_TAG '{' vers_tag '}' verdep ';'
1176 {
1177 lang_register_vers_node ($1, $3, $5);
1178 }
1179 ;
1180
1181 verdep:
1182 VERS_TAG
1183 {
1184 $$ = lang_add_vers_depend (NULL, $1);
1185 }
1186 | verdep VERS_TAG
1187 {
1188 $$ = lang_add_vers_depend ($1, $2);
1189 }
1190 ;
1191
1192 vers_tag:
1193 /* empty */
1194 {
1195 $$ = lang_new_vers_node (NULL, NULL);
1196 }
1197 | vers_defns ';'
1198 {
1199 $$ = lang_new_vers_node ($1, NULL);
1200 }
1201 | GLOBAL ':' vers_defns ';'
1202 {
1203 $$ = lang_new_vers_node ($3, NULL);
1204 }
1205 | LOCAL ':' vers_defns ';'
1206 {
1207 $$ = lang_new_vers_node (NULL, $3);
1208 }
1209 | GLOBAL ':' vers_defns ';' LOCAL ':' vers_defns ';'
1210 {
1211 $$ = lang_new_vers_node ($3, $7);
1212 }
1213 ;
1214
1215 vers_defns:
1216 VERS_IDENTIFIER
1217 {
1218 $$ = lang_new_vers_pattern (NULL, $1, ldgram_vers_current_lang);
1219 }
1220 | vers_defns ';' VERS_IDENTIFIER
1221 {
1222 $$ = lang_new_vers_pattern ($1, $3, ldgram_vers_current_lang);
1223 }
1224 | vers_defns ';' EXTERN NAME '{'
1225 {
1226 $<name>$ = ldgram_vers_current_lang;
1227 ldgram_vers_current_lang = $4;
1228 }
1229 vers_defns opt_semicolon '}'
1230 {
1231 $$ = $7;
1232 ldgram_vers_current_lang = $<name>6;
1233 }
1234 | EXTERN NAME '{'
1235 {
1236 $<name>$ = ldgram_vers_current_lang;
1237 ldgram_vers_current_lang = $2;
1238 }
1239 vers_defns opt_semicolon '}'
1240 {
1241 $$ = $5;
1242 ldgram_vers_current_lang = $<name>4;
1243 }
1244 ;
1245
1246 opt_semicolon:
1247 /* empty */
1248 | ';'
1249 ;
1250
1251 %%
1252 void
1253 yyerror(arg)
1254 const char *arg;
1255 {
1256 if (ldfile_assumed_script)
1257 einfo (_("%P:%s: file format not recognized; treating as linker script\n"),
1258 ldfile_input_filename);
1259 if (error_index > 0 && error_index < ERROR_NAME_MAX)
1260 einfo ("%P%F:%S: %s in %s\n", arg, error_names[error_index-1]);
1261 else
1262 einfo ("%P%F:%S: %s\n", arg);
1263 }
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