This commit was generated by cvs2svn to track changes on a CVS vendor
[external/binutils.git] / ld / ldgram.y
1 /* A YACC grammer to parse a superset of the AT&T linker scripting languaue.
2    Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000
3    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 "ldemul.h"
37 #include "ldfile.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 struct wildcard_spec current_file;
53 boolean ldgram_want_filename = true;
54 boolean had_script = false;
55 boolean force_make_executable = false;
56
57 boolean ldgram_in_script = false;
58 boolean ldgram_had_equals = false;
59 boolean ldgram_had_keep = false;
60 char *ldgram_vers_current_lang = NULL;
61
62 #define ERROR_NAME_MAX 20
63 static char *error_names[ERROR_NAME_MAX];
64 static int error_index;
65 #define PUSH_ERROR(x) if (error_index < ERROR_NAME_MAX) error_names[error_index] = x; error_index++;
66 #define POP_ERROR()   error_index--;
67 %}
68 %union {
69   bfd_vma integer;
70   char *name;
71   const char *cname;
72   struct wildcard_spec wildcard;
73   struct name_list *name_list;
74   int token;
75   union etree_union *etree;
76   struct phdr_info
77     {
78       boolean filehdr;
79       boolean phdrs;
80       union etree_union *at;
81       union etree_union *flags;
82     } phdr;
83   struct lang_nocrossref *nocrossref;
84   struct lang_output_section_phdr_list *section_phdr;
85   struct bfd_elf_version_deps *deflist;
86   struct bfd_elf_version_expr *versyms;
87   struct bfd_elf_version_tree *versnode;
88 }
89
90 %type <etree> exp opt_exp_with_type mustbe_exp opt_at phdr_type phdr_val
91 %type <etree> opt_exp_without_type
92 %type <integer> fill_opt
93 %type <name_list> exclude_name_list
94 %type <name> memspec_opt casesymlist
95 %type <name> memspec_at_opt
96 %type <cname> wildcard_name
97 %type <wildcard> wildcard_spec
98 %token <integer> INT  
99 %token <name> NAME LNAME
100 %type <integer> length
101 %type <phdr> phdr_qualifiers
102 %type <nocrossref> nocrossref_list
103 %type <section_phdr> phdr_opt
104 %type <integer> opt_nocrossrefs
105
106 %right <token> PLUSEQ MINUSEQ MULTEQ DIVEQ  '=' LSHIFTEQ RSHIFTEQ   ANDEQ OREQ 
107 %right <token> '?' ':'
108 %left <token> OROR
109 %left <token>  ANDAND
110 %left <token> '|'
111 %left <token>  '^'
112 %left  <token> '&'
113 %left <token>  EQ NE
114 %left  <token> '<' '>' LE GE
115 %left  <token> LSHIFT RSHIFT
116
117 %left  <token> '+' '-'
118 %left  <token> '*' '/' '%'
119
120 %right UNARY
121 %token END 
122 %left <token> '('
123 %token <token> ALIGN_K BLOCK BIND QUAD SQUAD LONG SHORT BYTE
124 %token SECTIONS PHDRS SORT
125 %token '{' '}'
126 %token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH
127 %token SIZEOF_HEADERS
128 %token INCLUDE
129 %token MEMORY DEFSYMEND
130 %token NOLOAD DSECT COPY INFO OVERLAY
131 %token NAME LNAME DEFINED TARGET_K SEARCH_DIR MAP ENTRY
132 %token <integer> NEXT
133 %token SIZEOF ADDR LOADADDR MAX_K MIN_K
134 %token STARTUP HLL SYSLIB FLOAT NOFLOAT NOCROSSREFS
135 %token ORIGIN FILL
136 %token LENGTH CREATE_OBJECT_SYMBOLS INPUT GROUP OUTPUT CONSTRUCTORS
137 %token ALIGNMOD AT PROVIDE
138 %type <token> assign_op atype attributes_opt
139 %type <name>  filename
140 %token CHIP LIST SECT ABSOLUTE  LOAD NEWLINE ENDWORD ORDER NAMEWORD ASSERT_K
141 %token FORMAT PUBLIC DEFSYMEND BASE ALIAS TRUNCATE REL
142 %token INPUT_SCRIPT INPUT_MRI_SCRIPT INPUT_DEFSYM CASE EXTERN START
143 %token <name> VERS_TAG VERS_IDENTIFIER
144 %token GLOBAL LOCAL VERSIONK INPUT_VERSION_SCRIPT
145 %token KEEP
146 %token EXCLUDE_FILE
147 %type <versyms> vers_defns
148 %type <versnode> vers_tag
149 %type <deflist> verdep
150
151 %%
152
153 file:   
154                 INPUT_SCRIPT script_file
155         |       INPUT_MRI_SCRIPT mri_script_file
156         |       INPUT_VERSION_SCRIPT version_script_file
157         |       INPUT_DEFSYM defsym_expr
158         ;
159
160
161 filename:  NAME;
162
163
164 defsym_expr:
165                 { ldlex_defsym(); }
166                 NAME '=' exp
167                 {
168                   ldlex_popstate();
169                   lang_add_assignment(exp_assop($3,$2,$4));
170                 }
171
172 /* SYNTAX WITHIN AN MRI SCRIPT FILE */  
173 mri_script_file:
174                 {
175                   ldlex_mri_script ();
176                   PUSH_ERROR (_("MRI style script"));
177                 }
178              mri_script_lines
179                 {
180                   ldlex_popstate ();
181                   mri_draw_tree ();
182                   POP_ERROR ();
183                 }
184         ;
185
186 mri_script_lines:
187                 mri_script_lines mri_script_command NEWLINE
188           |
189         ;
190
191 mri_script_command:
192                 CHIP  exp 
193         |       CHIP  exp ',' exp
194         |       NAME    {
195                         einfo(_("%P%F: unrecognised keyword in MRI style script '%s'\n"),$1);
196                         }
197         |       LIST    {
198                         config.map_filename = "-";
199                         }
200         |       ORDER ordernamelist
201         |       ENDWORD 
202         |       PUBLIC NAME '=' exp
203                         { mri_public($2, $4); }
204         |       PUBLIC NAME ',' exp
205                         { mri_public($2, $4); }
206         |       PUBLIC NAME  exp 
207                         { mri_public($2, $3); }
208         |       FORMAT NAME
209                         { mri_format($2); }
210         |       SECT NAME ',' exp
211                         { mri_output_section($2, $4);}
212         |       SECT NAME  exp
213                         { mri_output_section($2, $3);}
214         |       SECT NAME '=' exp
215                         { mri_output_section($2, $4);}
216         |       ALIGN_K NAME '=' exp
217                         { mri_align($2,$4); }
218         |       ALIGN_K NAME ',' exp
219                         { mri_align($2,$4); }
220         |       ALIGNMOD NAME '=' exp
221                         { mri_alignmod($2,$4); }
222         |       ALIGNMOD NAME ',' exp
223                         { mri_alignmod($2,$4); }
224         |       ABSOLUTE mri_abs_name_list
225         |       LOAD     mri_load_name_list
226         |       NAMEWORD NAME 
227                         { mri_name($2); }   
228         |       ALIAS NAME ',' NAME
229                         { mri_alias($2,$4,0);}
230         |       ALIAS NAME ',' INT
231                         { mri_alias($2,0,(int) $4);}
232         |       BASE     exp
233                         { mri_base($2); }
234         |       TRUNCATE INT
235                 {  mri_truncate((unsigned int) $2); }
236         |       CASE casesymlist
237         |       EXTERN extern_name_list
238         |       INCLUDE filename
239                 { ldfile_open_command_file ($2); } mri_script_lines END
240         |       START NAME
241                 { lang_add_entry ($2, false); }
242         |
243         ;
244
245 ordernamelist:
246               ordernamelist ',' NAME         { mri_order($3); }
247         |     ordernamelist  NAME         { mri_order($2); }
248         |
249         ;
250
251 mri_load_name_list:
252                 NAME
253                         { mri_load($1); }
254         |       mri_load_name_list ',' NAME { mri_load($3); }
255         ;
256
257 mri_abs_name_list:
258                 NAME
259                         { mri_only_load($1); }
260         |       mri_abs_name_list ','  NAME
261                         { mri_only_load($3); }
262         ;
263
264 casesymlist:
265           /* empty */ { $$ = NULL; }
266         | NAME
267         | casesymlist ',' NAME
268         ;
269
270 extern_name_list:
271           NAME
272                         { ldlang_add_undef ($1); }
273         | extern_name_list NAME
274                         { ldlang_add_undef ($2); }
275         | extern_name_list ',' NAME
276                         { ldlang_add_undef ($3); }
277         ;
278
279 script_file:
280         {
281          ldlex_both();
282         }
283        ifile_list
284         {
285         ldlex_popstate();
286         }
287         ;
288
289
290 ifile_list:
291        ifile_list ifile_p1
292         |
293         ;
294
295
296
297 ifile_p1:
298                 memory
299         |       sections
300         |       phdrs
301         |       startup
302         |       high_level_library
303         |       low_level_library
304         |       floating_point_support
305         |       statement_anywhere
306         |       version
307         |        ';'
308         |       TARGET_K '(' NAME ')'
309                 { lang_add_target($3); }
310         |       SEARCH_DIR '(' filename ')'
311                 { ldfile_add_library_path ($3, false); }
312         |       OUTPUT '(' filename ')'
313                 { lang_add_output($3, 1); }
314         |       OUTPUT_FORMAT '(' NAME ')'
315                   { lang_add_output_format ($3, (char *) NULL,
316                                             (char *) NULL, 1); }
317         |       OUTPUT_FORMAT '(' NAME ',' NAME ',' NAME ')'
318                   { lang_add_output_format ($3, $5, $7, 1); }
319         |       OUTPUT_ARCH '(' NAME ')'
320                   { ldfile_set_output_arch($3); }
321         |       FORCE_COMMON_ALLOCATION
322                 { command_line.force_common_definition = true ; }
323         |       INPUT '(' input_list ')'
324         |       GROUP
325                   { lang_enter_group (); }
326                     '(' input_list ')'
327                   { lang_leave_group (); }
328         |       MAP '(' filename ')'
329                 { lang_add_map($3); }
330         |       INCLUDE filename 
331                 { ldfile_open_command_file($2); } ifile_list END
332         |       NOCROSSREFS '(' nocrossref_list ')'
333                 {
334                   lang_add_nocrossref ($3);
335                 }
336         |       EXTERN '(' extern_name_list ')'
337         ;
338
339 input_list:
340                 NAME
341                 { lang_add_input_file($1,lang_input_file_is_search_file_enum,
342                                  (char *)NULL); }
343         |       input_list ',' NAME
344                 { lang_add_input_file($3,lang_input_file_is_search_file_enum,
345                                  (char *)NULL); }
346         |       input_list NAME
347                 { lang_add_input_file($2,lang_input_file_is_search_file_enum,
348                                  (char *)NULL); }
349         |       LNAME
350                 { lang_add_input_file($1,lang_input_file_is_l_enum,
351                                  (char *)NULL); }
352         |       input_list ',' LNAME
353                 { lang_add_input_file($3,lang_input_file_is_l_enum,
354                                  (char *)NULL); }
355         |       input_list LNAME
356                 { lang_add_input_file($2,lang_input_file_is_l_enum,
357                                  (char *)NULL); }
358         ;
359
360 sections:
361                 SECTIONS '{' sec_or_group_p1 '}'
362         ;
363
364 sec_or_group_p1:
365                 sec_or_group_p1 section
366         |       sec_or_group_p1 statement_anywhere
367         |
368         ;
369
370 statement_anywhere:
371                 ENTRY '(' NAME ')'
372                 { lang_add_entry ($3, false); }
373         |       assignment end
374         ;
375
376 /* The '*' and '?' cases are there because the lexer returns them as
377    separate tokens rather than as NAME.  */
378 wildcard_name:
379                 NAME
380                         {
381                           $$ = $1;
382                         }
383         |       '*'
384                         {
385                           $$ = "*";
386                         }
387         |       '?'
388                         {
389                           $$ = "?";
390                         }
391         ;
392
393 wildcard_spec:
394                 wildcard_name
395                         {
396                           $$.name = $1;
397                           $$.sorted = false;
398                           $$.exclude_name_list = NULL;
399                         }
400         |       EXCLUDE_FILE '(' exclude_name_list ')' wildcard_name
401                         {
402                           $$.name = $5;
403                           $$.sorted = false;
404                           $$.exclude_name_list = $3;
405                         }
406         |       SORT '(' wildcard_name ')'
407                         {
408                           $$.name = $3;
409                           $$.sorted = true;
410                           $$.exclude_name_list = NULL;
411                         }
412         |       SORT '(' EXCLUDE_FILE '(' exclude_name_list ')' wildcard_name ')'
413                         {
414                           $$.name = $7;
415                           $$.sorted = true;
416                           $$.exclude_name_list = $5;
417                         }
418         ;
419
420
421
422 exclude_name_list:
423                 exclude_name_list wildcard_name
424                         {
425                           struct name_list *tmp;
426                           tmp = (struct name_list *) xmalloc (sizeof *tmp);
427                           tmp->name = $2;
428                           tmp->next = $1;
429                           $$ = tmp;     
430                         }
431         |
432                 wildcard_name
433                         {
434                           struct name_list *tmp;
435                           tmp = (struct name_list *) xmalloc (sizeof *tmp);
436                           tmp->name = $1;
437                           tmp->next = NULL;
438                           $$ = tmp;
439                         }
440         ;
441
442 file_NAME_list:
443                 wildcard_spec
444                         {
445                           lang_add_wild ($1.name, $1.sorted,
446                                          current_file.name,
447                                          current_file.sorted,
448                                          ldgram_had_keep, $1.exclude_name_list);
449                         }
450         |       file_NAME_list opt_comma wildcard_spec
451                         {
452                           lang_add_wild ($3.name, $3.sorted,
453                                          current_file.name,
454                                          current_file.sorted,
455                                          ldgram_had_keep, $3.exclude_name_list);
456                         }
457         ;
458
459 input_section_spec_no_keep:
460                 NAME
461                         {
462                           lang_add_wild (NULL, false, $1, false,
463                                          ldgram_had_keep, NULL);
464                         }
465         |       '['
466                         {
467                           current_file.name = NULL;
468                           current_file.sorted = false;
469                         }
470                 file_NAME_list ']'
471         |       wildcard_spec
472                         {
473                           current_file = $1;
474                           /* '*' matches any file name.  */
475                           if (strcmp (current_file.name, "*") == 0)
476                             current_file.name = NULL;
477                         }
478                 '(' file_NAME_list ')'
479         ;
480
481 input_section_spec:
482                 input_section_spec_no_keep
483         |       KEEP '('
484                         { ldgram_had_keep = true; }
485                 input_section_spec_no_keep ')'
486                         { ldgram_had_keep = false; }
487         ;
488
489 statement:
490                 assignment end
491         |       CREATE_OBJECT_SYMBOLS
492                 {
493                 lang_add_attribute(lang_object_symbols_statement_enum); 
494                 }
495         |       ';'
496         |       CONSTRUCTORS
497                 {
498                 
499                   lang_add_attribute(lang_constructors_statement_enum); 
500                 }
501         | SORT '(' CONSTRUCTORS ')'
502                 {
503                   constructors_sorted = true;
504                   lang_add_attribute (lang_constructors_statement_enum);
505                 }
506         | input_section_spec
507         | length '(' mustbe_exp ')'
508                         {
509                         lang_add_data((int) $1,$3);
510                         }
511   
512         | FILL '(' mustbe_exp ')'
513                         {
514                           lang_add_fill
515                             (exp_get_value_int($3,
516                                                0,
517                                                "fill value",
518                                                lang_first_phase_enum));
519                         }
520         ;
521
522 statement_list:
523                 statement_list statement
524         |       statement
525         ;
526   
527 statement_list_opt:
528                 /* empty */
529         |       statement_list
530         ;
531
532 length:
533                 QUAD
534                         { $$ = $1; }
535         |       SQUAD
536                         { $$ = $1; }
537         |       LONG
538                         { $$ = $1; }
539         |       SHORT
540                         { $$ = $1; }
541         |       BYTE
542                         { $$ = $1; }
543         ;
544
545 fill_opt:
546           '=' mustbe_exp
547                 {
548                   $$ =   exp_get_value_int($2,
549                                            0,
550                                            "fill value",
551                                            lang_first_phase_enum);
552                 }
553         |       { $$ = 0; }
554         ;
555
556                 
557
558 assign_op:
559                 PLUSEQ
560                         { $$ = '+'; }
561         |       MINUSEQ
562                         { $$ = '-'; }
563         |       MULTEQ
564                         { $$ = '*'; }
565         |       DIVEQ
566                         { $$ = '/'; }
567         |       LSHIFTEQ
568                         { $$ = LSHIFT; }
569         |       RSHIFTEQ
570                         { $$ = RSHIFT; }
571         |       ANDEQ
572                         { $$ = '&'; }
573         |       OREQ
574                         { $$ = '|'; }
575
576         ;
577
578 end:    ';' | ','
579         ;
580
581
582 assignment:
583                 NAME '=' mustbe_exp
584                 {
585                   lang_add_assignment (exp_assop ($2, $1, $3));
586                 }
587         |       NAME assign_op mustbe_exp
588                 {
589                   lang_add_assignment (exp_assop ('=', $1,
590                                                   exp_binop ($2,
591                                                              exp_nameop (NAME,
592                                                                          $1),
593                                                              $3)));
594                 }
595         |       PROVIDE '(' NAME '=' mustbe_exp ')'
596                 {
597                   lang_add_assignment (exp_provide ($3, $5));
598                 }
599         ;
600
601
602 opt_comma:
603                 ','     |       ;
604
605
606 memory:
607                 MEMORY '{' memory_spec memory_spec_list '}'
608         ;
609
610 memory_spec_list:
611                 memory_spec_list memory_spec
612         |       memory_spec_list ',' memory_spec
613         |
614         ;
615
616
617 memory_spec:            NAME
618                         { region = lang_memory_region_lookup($1); }
619                 attributes_opt ':'
620                 origin_spec opt_comma length_spec
621
622         ;
623
624 origin_spec:
625         ORIGIN '=' mustbe_exp
626                 { region->current =
627                  region->origin =
628                  exp_get_vma($3, 0L,"origin", lang_first_phase_enum);
629 }
630         ;
631
632 length_spec:
633              LENGTH '=' mustbe_exp
634                { region->length = exp_get_vma($3,
635                                                ~((bfd_vma)0),
636                                                "length",
637                                                lang_first_phase_enum);
638                 }
639         ;
640
641 attributes_opt:
642                 /* empty */
643                   { /* dummy action to avoid bison 1.25 error message */ }
644         |       '(' attributes_list ')'
645         ;
646
647 attributes_list:
648                 attributes_string
649         |       attributes_list attributes_string
650         ;
651
652 attributes_string:
653                 NAME
654                   { lang_set_flags (region, $1, 0); }
655         |       '!' NAME
656                   { lang_set_flags (region, $2, 1); }
657         ;
658
659 startup:
660         STARTUP '(' filename ')'
661                 { lang_startup($3); }
662         ;
663
664 high_level_library:
665                 HLL '(' high_level_library_NAME_list ')'
666         |       HLL '(' ')'
667                         { ldemul_hll((char *)NULL); }
668         ;
669
670 high_level_library_NAME_list:
671                 high_level_library_NAME_list opt_comma filename
672                         { ldemul_hll($3); }
673         |       filename
674                         { ldemul_hll($1); }
675
676         ;
677
678 low_level_library:
679         SYSLIB '(' low_level_library_NAME_list ')'
680         ; low_level_library_NAME_list:
681                 low_level_library_NAME_list opt_comma filename
682                         { ldemul_syslib($3); }
683         |
684         ;
685
686 floating_point_support:
687                 FLOAT
688                         { lang_float(true); }
689         |       NOFLOAT
690                         { lang_float(false); }
691         ;
692                 
693 nocrossref_list:
694                 /* empty */
695                 {
696                   $$ = NULL;
697                 }
698         |       NAME nocrossref_list
699                 {
700                   struct lang_nocrossref *n;
701
702                   n = (struct lang_nocrossref *) xmalloc (sizeof *n);
703                   n->name = $1;
704                   n->next = $2;
705                   $$ = n;
706                 }
707         |       NAME ',' nocrossref_list
708                 {
709                   struct lang_nocrossref *n;
710
711                   n = (struct lang_nocrossref *) xmalloc (sizeof *n);
712                   n->name = $1;
713                   n->next = $3;
714                   $$ = n;
715                 }
716         ;
717
718 mustbe_exp:              { ldlex_expression(); }
719                 exp
720                          { ldlex_popstate(); $$=$2;}
721         ;
722
723 exp     :
724                 '-' exp %prec UNARY
725                         { $$ = exp_unop('-', $2); }
726         |       '(' exp ')'
727                         { $$ = $2; }
728         |       NEXT '(' exp ')' %prec UNARY
729                         { $$ = exp_unop((int) $1,$3); }
730         |       '!' exp %prec UNARY
731                         { $$ = exp_unop('!', $2); }
732         |       '+' exp %prec UNARY
733                         { $$ = $2; }
734         |       '~' exp %prec UNARY
735                         { $$ = exp_unop('~', $2);}
736
737         |       exp '*' exp
738                         { $$ = exp_binop('*', $1, $3); }
739         |       exp '/' exp
740                         { $$ = exp_binop('/', $1, $3); }
741         |       exp '%' exp
742                         { $$ = exp_binop('%', $1, $3); }
743         |       exp '+' exp
744                         { $$ = exp_binop('+', $1, $3); }
745         |       exp '-' exp
746                         { $$ = exp_binop('-' , $1, $3); }
747         |       exp LSHIFT exp
748                         { $$ = exp_binop(LSHIFT , $1, $3); }
749         |       exp RSHIFT exp
750                         { $$ = exp_binop(RSHIFT , $1, $3); }
751         |       exp EQ exp
752                         { $$ = exp_binop(EQ , $1, $3); }
753         |       exp NE exp
754                         { $$ = exp_binop(NE , $1, $3); }
755         |       exp LE exp
756                         { $$ = exp_binop(LE , $1, $3); }
757         |       exp GE exp
758                         { $$ = exp_binop(GE , $1, $3); }
759         |       exp '<' exp
760                         { $$ = exp_binop('<' , $1, $3); }
761         |       exp '>' exp
762                         { $$ = exp_binop('>' , $1, $3); }
763         |       exp '&' exp
764                         { $$ = exp_binop('&' , $1, $3); }
765         |       exp '^' exp
766                         { $$ = exp_binop('^' , $1, $3); }
767         |       exp '|' exp
768                         { $$ = exp_binop('|' , $1, $3); }
769         |       exp '?' exp ':' exp
770                         { $$ = exp_trinop('?' , $1, $3, $5); }
771         |       exp ANDAND exp
772                         { $$ = exp_binop(ANDAND , $1, $3); }
773         |       exp OROR exp
774                         { $$ = exp_binop(OROR , $1, $3); }
775         |       DEFINED '(' NAME ')'
776                         { $$ = exp_nameop(DEFINED, $3); }
777         |       INT
778                         { $$ = exp_intop($1); }
779         |       SIZEOF_HEADERS
780                         { $$ = exp_nameop(SIZEOF_HEADERS,0); }
781
782         |       SIZEOF '(' NAME ')'
783                         { $$ = exp_nameop(SIZEOF,$3); }
784         |       ADDR '(' NAME ')'
785                         { $$ = exp_nameop(ADDR,$3); }
786         |       LOADADDR '(' NAME ')'
787                         { $$ = exp_nameop(LOADADDR,$3); }
788         |       ABSOLUTE '(' exp ')'
789                         { $$ = exp_unop(ABSOLUTE, $3); }
790         |       ALIGN_K '(' exp ')'
791                         { $$ = exp_unop(ALIGN_K,$3); }
792         |       BLOCK '(' exp ')'
793                         { $$ = exp_unop(ALIGN_K,$3); }
794         |       NAME
795                         { $$ = exp_nameop(NAME,$1); }
796         |       MAX_K '(' exp ',' exp ')'
797                         { $$ = exp_binop (MAX_K, $3, $5 ); }
798         |       MIN_K '(' exp ',' exp ')'
799                         { $$ = exp_binop (MIN_K, $3, $5 ); }
800         |       ASSERT_K '(' exp ',' NAME ')'
801                         { $$ = exp_assert ($3, $5); }
802         ;
803
804
805 memspec_at_opt:
806                 AT '>' NAME { $$ = $3; }
807         |       { $$ = "*default*"; }
808         ;
809
810 opt_at:
811                 AT '(' exp ')' { $$ = $3; }
812         |       { $$ = 0; }
813         ;
814
815 section:        NAME            { ldlex_expression(); }
816                 opt_exp_with_type 
817                 opt_at          { ldlex_popstate (); ldlex_script (); }
818                 '{'
819                         {
820                           lang_enter_output_section_statement($1, $3,
821                                                               sectype,
822                                                               0, 0, 0, $4);
823                         }
824                 statement_list_opt      
825                 '}' { ldlex_popstate (); ldlex_expression (); }
826                 memspec_opt memspec_at_opt phdr_opt fill_opt
827                 {
828                   ldlex_popstate ();
829                   lang_leave_output_section_statement ($14, $11, $13, $12);
830                 }
831                 opt_comma
832         |       OVERLAY
833                         { ldlex_expression (); }
834                 opt_exp_without_type opt_nocrossrefs opt_at
835                         { ldlex_popstate (); ldlex_script (); }
836                 '{' 
837                         {
838                           lang_enter_overlay ($3, $5, (int) $4);
839                         }
840                 overlay_section
841                 '}'
842                         { ldlex_popstate (); ldlex_expression (); }
843                 memspec_opt memspec_at_opt phdr_opt fill_opt
844                         {
845                           ldlex_popstate ();
846                           lang_leave_overlay ($15, $12, $14, $13);
847                         }
848                 opt_comma
849         |       /* The GROUP case is just enough to support the gcc
850                    svr3.ifile script.  It is not intended to be full
851                    support.  I'm not even sure what GROUP is supposed
852                    to mean.  */
853                 GROUP { ldlex_expression (); }
854                 opt_exp_with_type
855                 {
856                   ldlex_popstate ();
857                   lang_add_assignment (exp_assop ('=', ".", $3));
858                 }
859                 '{' sec_or_group_p1 '}'
860         ;
861
862 type:
863            NOLOAD  { sectype = noload_section; }
864         |  DSECT   { sectype = dsect_section; }
865         |  COPY    { sectype = copy_section; }
866         |  INFO    { sectype = info_section; }
867         |  OVERLAY { sectype = overlay_section; }
868         ;
869
870 atype:
871                 '(' type ')'
872         |       /* EMPTY */ { sectype = normal_section; }
873         |       '(' ')' { sectype = normal_section; }
874         ;
875
876 opt_exp_with_type:
877                 exp atype ':'           { $$ = $1; }
878         |       atype ':'               { $$ = (etree_type *)NULL;  }
879         |       /* The BIND cases are to support the gcc svr3.ifile
880                    script.  They aren't intended to implement full
881                    support for the BIND keyword.  I'm not even sure
882                    what BIND is supposed to mean.  */
883                 BIND '(' exp ')' atype ':' { $$ = $3; }
884         |       BIND '(' exp ')' BLOCK '(' exp ')' atype ':'
885                 { $$ = $3; }
886         ;
887
888 opt_exp_without_type:
889                 exp ':'         { $$ = $1; }
890         |       ':'             { $$ = (etree_type *) NULL;  }
891         ;
892
893 opt_nocrossrefs:
894                 /* empty */
895                         { $$ = 0; }
896         |       NOCROSSREFS
897                         { $$ = 1; }
898         ;
899
900 memspec_opt:
901                 '>' NAME
902                 { $$ = $2; }
903         |       { $$ = "*default*"; }
904         ;
905
906 phdr_opt:
907                 /* empty */
908                 {
909                   $$ = NULL;
910                 }
911         |       phdr_opt ':' NAME
912                 {
913                   struct lang_output_section_phdr_list *n;
914
915                   n = ((struct lang_output_section_phdr_list *)
916                        xmalloc (sizeof *n));
917                   n->name = $3;
918                   n->used = false;
919                   n->next = $1;
920                   $$ = n;
921                 }
922         ;
923
924 overlay_section:
925                 /* empty */
926         |       overlay_section
927                 NAME
928                         {
929                           ldlex_script ();
930                           lang_enter_overlay_section ($2);
931                         }
932                 '{' statement_list_opt '}'
933                         { ldlex_popstate (); ldlex_expression (); }
934                 phdr_opt fill_opt
935                         {
936                           ldlex_popstate ();
937                           lang_leave_overlay_section ($9, $8);
938                         }
939                 opt_comma
940         ;
941
942 phdrs:
943                 PHDRS '{' phdr_list '}'
944         ;
945
946 phdr_list:
947                 /* empty */
948         |       phdr_list phdr
949         ;
950
951 phdr:
952                 NAME { ldlex_expression (); }
953                   phdr_type phdr_qualifiers { ldlex_popstate (); }
954                   ';'
955                 {
956                   lang_new_phdr ($1, $3, $4.filehdr, $4.phdrs, $4.at,
957                                  $4.flags);
958                 }
959         ;
960
961 phdr_type:
962                 exp
963                 {
964                   $$ = $1;
965
966                   if ($1->type.node_class == etree_name
967                       && $1->type.node_code == NAME)
968                     {
969                       const char *s;
970                       unsigned int i;
971                       static const char * const phdr_types[] =
972                         {
973                           "PT_NULL", "PT_LOAD", "PT_DYNAMIC",
974                           "PT_INTERP", "PT_NOTE", "PT_SHLIB",
975                           "PT_PHDR"
976                         };
977
978                       s = $1->name.name;
979                       for (i = 0;
980                            i < sizeof phdr_types / sizeof phdr_types[0];
981                            i++)
982                         if (strcmp (s, phdr_types[i]) == 0)
983                           {
984                             $$ = exp_intop (i);
985                             break;
986                           }
987                     }
988                 }
989         ;
990
991 phdr_qualifiers:
992                 /* empty */
993                 {
994                   memset (&$$, 0, sizeof (struct phdr_info));
995                 }
996         |       NAME phdr_val phdr_qualifiers
997                 {
998                   $$ = $3;
999                   if (strcmp ($1, "FILEHDR") == 0 && $2 == NULL)
1000                     $$.filehdr = true;
1001                   else if (strcmp ($1, "PHDRS") == 0 && $2 == NULL)
1002                     $$.phdrs = true;
1003                   else if (strcmp ($1, "FLAGS") == 0 && $2 != NULL)
1004                     $$.flags = $2;
1005                   else
1006                     einfo (_("%X%P:%S: PHDRS syntax error at `%s'\n"), $1);
1007                 }
1008         |       AT '(' exp ')' phdr_qualifiers
1009                 {
1010                   $$ = $5;
1011                   $$.at = $3;
1012                 }
1013         ;
1014
1015 phdr_val:
1016                 /* empty */
1017                 {
1018                   $$ = NULL;
1019                 }
1020         | '(' exp ')'
1021                 {
1022                   $$ = $2;
1023                 }
1024         ;
1025
1026 /* This syntax is used within an external version script file.  */
1027
1028 version_script_file:
1029                 {
1030                   ldlex_version_file ();
1031                   PUSH_ERROR (_("VERSION script"));
1032                 }
1033                 vers_nodes
1034                 {
1035                   ldlex_popstate ();
1036                   POP_ERROR ();
1037                 }
1038         ;
1039
1040 /* This is used within a normal linker script file.  */
1041
1042 version:
1043                 {
1044                   ldlex_version_script ();
1045                 }
1046                 VERSIONK '{' vers_nodes '}'
1047                 {
1048                   ldlex_popstate ();
1049                 }
1050         ;
1051
1052 vers_nodes:
1053                 vers_node
1054         |       vers_nodes vers_node
1055         ;
1056
1057 vers_node:
1058                 VERS_TAG '{' vers_tag '}' ';'
1059                 {
1060                   lang_register_vers_node ($1, $3, NULL);
1061                 }
1062         |       VERS_TAG '{' vers_tag '}' verdep ';'
1063                 {
1064                   lang_register_vers_node ($1, $3, $5);
1065                 }
1066         ;
1067
1068 verdep:
1069                 VERS_TAG
1070                 {
1071                   $$ = lang_add_vers_depend (NULL, $1);
1072                 }
1073         |       verdep VERS_TAG
1074                 {
1075                   $$ = lang_add_vers_depend ($1, $2);
1076                 }
1077         ;
1078
1079 vers_tag:
1080                 /* empty */
1081                 {
1082                   $$ = lang_new_vers_node (NULL, NULL);
1083                 }
1084         |       vers_defns ';'
1085                 {
1086                   $$ = lang_new_vers_node ($1, NULL);
1087                 }
1088         |       GLOBAL ':' vers_defns ';'
1089                 {
1090                   $$ = lang_new_vers_node ($3, NULL);
1091                 }
1092         |       LOCAL ':' vers_defns ';'
1093                 {
1094                   $$ = lang_new_vers_node (NULL, $3);
1095                 }
1096         |       GLOBAL ':' vers_defns ';' LOCAL ':' vers_defns ';'
1097                 {
1098                   $$ = lang_new_vers_node ($3, $7);
1099                 }
1100         ;
1101
1102 vers_defns:
1103                 VERS_IDENTIFIER
1104                 {
1105                   $$ = lang_new_vers_regex (NULL, $1, ldgram_vers_current_lang);
1106                 }
1107         |       vers_defns ';' VERS_IDENTIFIER
1108                 {
1109                   $$ = lang_new_vers_regex ($1, $3, ldgram_vers_current_lang);
1110                 }
1111         |       EXTERN NAME '{'
1112                         {
1113                           $<name>$ = ldgram_vers_current_lang;
1114                           ldgram_vers_current_lang = $2;
1115                         }
1116                 vers_defns '}'
1117                         {
1118                           $$ = $5;
1119                           ldgram_vers_current_lang = $<name>4;
1120                         }
1121         ;
1122
1123 %%
1124 void
1125 yyerror(arg) 
1126      const char *arg;
1127
1128   if (ldfile_assumed_script)
1129     einfo (_("%P:%s: file format not recognized; treating as linker script\n"),
1130            ldfile_input_filename);
1131   if (error_index > 0 && error_index < ERROR_NAME_MAX)
1132      einfo ("%P%F:%S: %s in %s\n", arg, error_names[error_index-1]);
1133   else
1134      einfo ("%P%F:%S: %s\n", arg);
1135 }