ld/ldgram.y

   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, 2006, 2007, 2008, 2009, 2010, 2011, 2012
   4    Free Software Foundation, Inc.
   5    Written by Steve Chamberlain of Cygnus Support (steve@cygnus.com).
   6
   7    This file is part of the GNU Binutils.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  22    MA 02110-1301, USA.  */
  23
  24 %{
  25 /*
  26
  27  */
  28
  29 #define DONTDECLARE_MALLOC
  30
  31 #include "sysdep.h"
  32 #include "bfd.h"
  33 #include "bfdlink.h"
  34 #include "ld.h"
  35 #include "ldexp.h"
  36 #include "ldver.h"
  37 #include "ldlang.h"
  38 #include "ldfile.h"
  39 #include "ldemul.h"
  40 #include "ldmisc.h"
  41 #include "ldmain.h"
  42 #include "mri.h"
  43 #include "ldctor.h"
  44 #include "ldlex.h"
  45
  46 #ifndef YYDEBUG
  47 #define YYDEBUG 1
  48 #endif
  49
  50 static enum section_type sectype;
  51 static lang_memory_region_type *region;
  52
  53 bfd_boolean ldgram_had_keep = FALSE;
  54 char *ldgram_vers_current_lang = NULL;
  55
  56 #define ERROR_NAME_MAX 20
  57 static char *error_names[ERROR_NAME_MAX];
  58 static int error_index;
  59 #define PUSH_ERROR(x) if (error_index < ERROR_NAME_MAX) error_names[error_index] = x; error_index++;
  60 #define POP_ERROR()   error_index--;
  61 %}
  62 %union {
  63   bfd_vma integer;
  64   struct big_int
  65     {
  66       bfd_vma integer;
  67       char *str;
  68     } bigint;
  69   fill_type *fill;
  70   char *name;
  71   const char *cname;
  72   struct wildcard_spec wildcard;
  73   struct wildcard_list *wildcard_list;
  74   struct name_list *name_list;
  75   struct flag_info_list *flag_info_list;
  76   struct flag_info *flag_info;
  77   int token;
  78   union etree_union *etree;
  79   struct phdr_info
  80     {
  81       bfd_boolean filehdr;
  82       bfd_boolean phdrs;
  83       union etree_union *at;
  84       union etree_union *flags;
  85     } phdr;
  86   struct lang_nocrossref *nocrossref;
  87   struct lang_output_section_phdr_list *section_phdr;
  88   struct bfd_elf_version_deps *deflist;
  89   struct bfd_elf_version_expr *versyms;
  90   struct bfd_elf_version_tree *versnode;
  91 }
  92
  93 %type <etree> exp opt_exp_with_type mustbe_exp opt_at phdr_type phdr_val
  94 %type <etree> opt_exp_without_type opt_subalign opt_align
  95 %type <fill> fill_opt fill_exp
  96 %type <name_list> exclude_name_list
  97 %type <wildcard_list> file_NAME_list
  98 %type <flag_info_list> sect_flag_list
  99 %type <flag_info> sect_flags
 100 %type <name> memspec_opt casesymlist
 101 %type <name> memspec_at_opt
 102 %type <cname> wildcard_name
 103 %type <wildcard> wildcard_spec
 104 %token <bigint> INT
 105 %token <name> NAME LNAME
 106 %type <integer> length
 107 %type <phdr> phdr_qualifiers
 108 %type <nocrossref> nocrossref_list
 109 %type <section_phdr> phdr_opt
 110 %type <integer> opt_nocrossrefs
 111
 112 %right <token> PLUSEQ MINUSEQ MULTEQ DIVEQ  '=' LSHIFTEQ RSHIFTEQ   ANDEQ OREQ
 113 %right <token> '?' ':'
 114 %left <token> OROR
 115 %left <token>  ANDAND
 116 %left <token> '|'
 117 %left <token>  '^'
 118 %left  <token> '&'
 119 %left <token>  EQ NE
 120 %left  <token> '<' '>' LE GE
 121 %left  <token> LSHIFT RSHIFT
 122
 123 %left  <token> '+' '-'
 124 %left  <token> '*' '/' '%'
 125
 126 %right UNARY
 127 %token END
 128 %left <token> '('
 129 %token <token> ALIGN_K BLOCK BIND QUAD SQUAD LONG SHORT BYTE
 130 %token SECTIONS PHDRS INSERT_K AFTER BEFORE
 131 %token DATA_SEGMENT_ALIGN DATA_SEGMENT_RELRO_END DATA_SEGMENT_END
 132 %token SORT_BY_NAME SORT_BY_ALIGNMENT
 133 %token SORT_BY_INIT_PRIORITY
 134 %token '{' '}'
 135 %token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH
 136 %token INHIBIT_COMMON_ALLOCATION
 137 %token SEGMENT_START
 138 %token INCLUDE
 139 %token MEMORY
 140 %token REGION_ALIAS
 141 %token LD_FEATURE
 142 %token NOLOAD DSECT COPY INFO OVERLAY
 143 %token DEFINED TARGET_K SEARCH_DIR MAP ENTRY
 144 %token <integer> NEXT
 145 %token SIZEOF ALIGNOF ADDR LOADADDR MAX_K MIN_K
 146 %token STARTUP HLL SYSLIB FLOAT NOFLOAT NOCROSSREFS
 147 %token ORIGIN FILL
 148 %token LENGTH CREATE_OBJECT_SYMBOLS INPUT GROUP OUTPUT CONSTRUCTORS
 149 %token ALIGNMOD AT SUBALIGN PROVIDE PROVIDE_HIDDEN AS_NEEDED
 150 %type <token> assign_op atype attributes_opt sect_constraint
 151 %type <name>  filename
 152 %token CHIP LIST SECT ABSOLUTE  LOAD NEWLINE ENDWORD ORDER NAMEWORD ASSERT_K
 153 %token FORMAT PUBLIC DEFSYMEND BASE ALIAS TRUNCATE REL
 154 %token INPUT_SCRIPT INPUT_MRI_SCRIPT INPUT_DEFSYM CASE EXTERN START
 155 %token <name> VERS_TAG VERS_IDENTIFIER
 156 %token GLOBAL LOCAL VERSIONK INPUT_VERSION_SCRIPT
 157 %token KEEP ONLY_IF_RO ONLY_IF_RW SPECIAL INPUT_SECTION_FLAGS
 158 %token EXCLUDE_FILE
 159 %token CONSTANT
 160 %type <versyms> vers_defns
 161 %type <versnode> vers_tag
 162 %type <deflist> verdep
 163 %token INPUT_DYNAMIC_LIST
 164
 165 %%
 166
 167 file:
 168                 INPUT_SCRIPT script_file
 169         |       INPUT_MRI_SCRIPT mri_script_file
 170         |       INPUT_VERSION_SCRIPT version_script_file
 171         |       INPUT_DYNAMIC_LIST dynamic_list_file
 172         |       INPUT_DEFSYM defsym_expr
 173         ;
 174
 175
 176 filename:  NAME;
 177
 178
 179 defsym_expr:
 180                 { ldlex_defsym(); }
 181                 NAME '=' exp
 182                 {
 183                   ldlex_popstate();
 184                   lang_add_assignment (exp_defsym ($2, $4));
 185                 }
 186         ;
 187
 188 /* SYNTAX WITHIN AN MRI SCRIPT FILE */
 189 mri_script_file:
 190                 {
 191                   ldlex_mri_script ();
 192                   PUSH_ERROR (_("MRI style script"));
 193                 }
 194              mri_script_lines
 195                 {
 196                   ldlex_popstate ();
 197                   mri_draw_tree ();
 198                   POP_ERROR ();
 199                 }
 200         ;
 201
 202 mri_script_lines:
 203                 mri_script_lines mri_script_command NEWLINE
 204           |
 205         ;
 206
 207 mri_script_command:
 208                 CHIP  exp
 209         |       CHIP  exp ',' exp
 210         |       NAME    {
 211                         einfo(_("%P%F: unrecognised keyword in MRI style script '%s'\n"),$1);
 212                         }
 213         |       LIST    {
 214                         config.map_filename = "-";
 215                         }
 216         |       ORDER ordernamelist
 217         |       ENDWORD
 218         |       PUBLIC NAME '=' exp
 219                         { mri_public($2, $4); }
 220         |       PUBLIC NAME ',' exp
 221                         { mri_public($2, $4); }
 222         |       PUBLIC NAME  exp
 223                         { mri_public($2, $3); }
 224         |       FORMAT NAME
 225                         { mri_format($2); }
 226         |       SECT NAME ',' exp
 227                         { mri_output_section($2, $4);}
 228         |       SECT NAME  exp
 229                         { mri_output_section($2, $3);}
 230         |       SECT NAME '=' exp
 231                         { mri_output_section($2, $4);}
 232         |       ALIGN_K NAME '=' exp
 233                         { mri_align($2,$4); }
 234         |       ALIGN_K NAME ',' exp
 235                         { mri_align($2,$4); }
 236         |       ALIGNMOD NAME '=' exp
 237                         { mri_alignmod($2,$4); }
 238         |       ALIGNMOD NAME ',' exp
 239                         { mri_alignmod($2,$4); }
 240         |       ABSOLUTE mri_abs_name_list
 241         |       LOAD     mri_load_name_list
 242         |       NAMEWORD NAME
 243                         { mri_name($2); }
 244         |       ALIAS NAME ',' NAME
 245                         { mri_alias($2,$4,0);}
 246         |       ALIAS NAME ',' INT
 247                         { mri_alias ($2, 0, (int) $4.integer); }
 248         |       BASE     exp
 249                         { mri_base($2); }
 250         |       TRUNCATE INT
 251                 { mri_truncate ((unsigned int) $2.integer); }
 252         |       CASE casesymlist
 253         |       EXTERN extern_name_list
 254         |       INCLUDE filename
 255                 { ldlex_script (); ldfile_open_command_file($2); }
 256                 mri_script_lines END
 257                 { ldlex_popstate (); }
 258         |       START NAME
 259                 { lang_add_entry ($2, FALSE); }
 260         |
 261         ;
 262
 263 ordernamelist:
 264               ordernamelist ',' NAME         { mri_order($3); }
 265         |     ordernamelist  NAME         { mri_order($2); }
 266         |
 267         ;
 268
 269 mri_load_name_list:
 270                 NAME
 271                         { mri_load($1); }
 272         |       mri_load_name_list ',' NAME { mri_load($3); }
 273         ;
 274
 275 mri_abs_name_list:
 276                 NAME
 277                         { mri_only_load($1); }
 278         |       mri_abs_name_list ','  NAME
 279                         { mri_only_load($3); }
 280         ;
 281
 282 casesymlist:
 283           /* empty */ { $$ = NULL; }
 284         | NAME
 285         | casesymlist ',' NAME
 286         ;
 287
 288 /* Parsed as expressions so that commas separate entries */
 289 extern_name_list:
 290         { ldlex_expression (); }
 291         extern_name_list_body
 292         { ldlex_popstate (); }
 293
 294 extern_name_list_body:
 295           NAME
 296                         { ldlang_add_undef ($1, FALSE); }
 297         | extern_name_list_body NAME
 298                         { ldlang_add_undef ($2, FALSE); }
 299         | extern_name_list_body ',' NAME
 300                         { ldlang_add_undef ($3, FALSE); }
 301         ;
 302
 303 script_file:
 304         { ldlex_both(); }
 305         ifile_list
 306         { ldlex_popstate(); }
 307         ;
 308
 309 ifile_list:
 310         ifile_list ifile_p1
 311         |
 312         ;
 313
 314
 315 ifile_p1:
 316                 memory
 317         |       sections
 318         |       phdrs
 319         |       startup
 320         |       high_level_library
 321         |       low_level_library
 322         |       floating_point_support
 323         |       statement_anywhere
 324         |       version
 325         |        ';'
 326         |       TARGET_K '(' NAME ')'
 327                 { lang_add_target($3); }
 328         |       SEARCH_DIR '(' filename ')'
 329                 { ldfile_add_library_path ($3, FALSE); }
 330         |       OUTPUT '(' filename ')'
 331                 { lang_add_output($3, 1); }
 332         |       OUTPUT_FORMAT '(' NAME ')'
 333                   { lang_add_output_format ($3, (char *) NULL,
 334                                             (char *) NULL, 1); }
 335         |       OUTPUT_FORMAT '(' NAME ',' NAME ',' NAME ')'
 336                   { lang_add_output_format ($3, $5, $7, 1); }
 337         |       OUTPUT_ARCH '(' NAME ')'
 338                   { ldfile_set_output_arch ($3, bfd_arch_unknown); }
 339         |       FORCE_COMMON_ALLOCATION
 340                 { command_line.force_common_definition = TRUE ; }
 341         |       INHIBIT_COMMON_ALLOCATION
 342                 { command_line.inhibit_common_definition = TRUE ; }
 343         |       INPUT '(' input_list ')'
 344         |       GROUP
 345                   { lang_enter_group (); }
 346                     '(' input_list ')'
 347                   { lang_leave_group (); }
 348         |       MAP '(' filename ')'
 349                 { lang_add_map($3); }
 350         |       INCLUDE filename
 351                 { ldlex_script (); ldfile_open_command_file($2); }
 352                 ifile_list END
 353                 { ldlex_popstate (); }
 354         |       NOCROSSREFS '(' nocrossref_list ')'
 355                 {
 356                   lang_add_nocrossref ($3);
 357                 }
 358         |       EXTERN '(' extern_name_list ')'
 359         |       INSERT_K AFTER NAME
 360                 { lang_add_insert ($3, 0); }
 361         |       INSERT_K BEFORE NAME
 362                 { lang_add_insert ($3, 1); }
 363         |       REGION_ALIAS '(' NAME ',' NAME ')'
 364                 { lang_memory_region_alias ($3, $5); }
 365         |       LD_FEATURE '(' NAME ')'
 366                 { lang_ld_feature ($3); }
 367         ;
 368
 369 input_list:
 370                 NAME
 371                 { lang_add_input_file($1,lang_input_file_is_search_file_enum,
 372                                  (char *)NULL); }
 373         |       input_list ',' NAME
 374                 { lang_add_input_file($3,lang_input_file_is_search_file_enum,
 375                                  (char *)NULL); }
 376         |       input_list NAME
 377                 { lang_add_input_file($2,lang_input_file_is_search_file_enum,
 378                                  (char *)NULL); }
 379         |       LNAME
 380                 { lang_add_input_file($1,lang_input_file_is_l_enum,
 381                                  (char *)NULL); }
 382         |       input_list ',' LNAME
 383                 { lang_add_input_file($3,lang_input_file_is_l_enum,
 384                                  (char *)NULL); }
 385         |       input_list LNAME
 386                 { lang_add_input_file($2,lang_input_file_is_l_enum,
 387                                  (char *)NULL); }
 388         |       AS_NEEDED '('
 389                   { $<integer>$ = add_DT_NEEDED_for_regular; add_DT_NEEDED_for_regular = TRUE; }
 390                      input_list ')'
 391                   { add_DT_NEEDED_for_regular = $<integer>3; }
 392         |       input_list ',' AS_NEEDED '('
 393                   { $<integer>$ = add_DT_NEEDED_for_regular; add_DT_NEEDED_for_regular = TRUE; }
 394                      input_list ')'
 395                   { add_DT_NEEDED_for_regular = $<integer>5; }
 396         |       input_list AS_NEEDED '('
 397                   { $<integer>$ = add_DT_NEEDED_for_regular; add_DT_NEEDED_for_regular = TRUE; }
 398                      input_list ')'
 399                   { add_DT_NEEDED_for_regular = $<integer>4; }
 400         ;
 401
 402 sections:
 403                 SECTIONS '{' sec_or_group_p1 '}'
 404         ;
 405
 406 sec_or_group_p1:
 407                 sec_or_group_p1 section
 408         |       sec_or_group_p1 statement_anywhere
 409         |
 410         ;
 411
 412 statement_anywhere:
 413                 ENTRY '(' NAME ')'
 414                 { lang_add_entry ($3, FALSE); }
 415         |       assignment end
 416         |       ASSERT_K  {ldlex_expression ();} '(' exp ',' NAME ')'
 417                 { ldlex_popstate ();
 418                   lang_add_assignment (exp_assert ($4, $6)); }
 419         ;
 420
 421 /* The '*' and '?' cases are there because the lexer returns them as
 422    separate tokens rather than as NAME.  */
 423 wildcard_name:
 424                 NAME
 425                         {
 426                           $$ = $1;
 427                         }
 428         |       '*'
 429                         {
 430                           $$ = "*";
 431                         }
 432         |       '?'
 433                         {
 434                           $$ = "?";
 435                         }
 436         ;
 437
 438 wildcard_spec:
 439                 wildcard_name
 440                         {
 441                           $$.name = $1;
 442                           $$.sorted = none;
 443                           $$.exclude_name_list = NULL;
 444                           $$.section_flag_list = NULL;
 445                         }
 446         |       EXCLUDE_FILE '(' exclude_name_list ')' wildcard_name
 447                         {
 448                           $$.name = $5;
 449                           $$.sorted = none;
 450                           $$.exclude_name_list = $3;
 451                           $$.section_flag_list = NULL;
 452                         }
 453         |       SORT_BY_NAME '(' wildcard_name ')'
 454                         {
 455                           $$.name = $3;
 456                           $$.sorted = by_name;
 457                           $$.exclude_name_list = NULL;
 458                           $$.section_flag_list = NULL;
 459                         }
 460         |       SORT_BY_ALIGNMENT '(' wildcard_name ')'
 461                         {
 462                           $$.name = $3;
 463                           $$.sorted = by_alignment;
 464                           $$.exclude_name_list = NULL;
 465                           $$.section_flag_list = NULL;
 466                         }
 467         |       SORT_BY_NAME '(' SORT_BY_ALIGNMENT '(' wildcard_name ')' ')'
 468                         {
 469                           $$.name = $5;
 470                           $$.sorted = by_name_alignment;
 471                           $$.exclude_name_list = NULL;
 472                           $$.section_flag_list = NULL;
 473                         }
 474         |       SORT_BY_NAME '(' SORT_BY_NAME '(' wildcard_name ')' ')'
 475                         {
 476                           $$.name = $5;
 477                           $$.sorted = by_name;
 478                           $$.exclude_name_list = NULL;
 479                           $$.section_flag_list = NULL;
 480                         }
 481         |       SORT_BY_ALIGNMENT '(' SORT_BY_NAME '(' wildcard_name ')' ')'
 482                         {
 483                           $$.name = $5;
 484                           $$.sorted = by_alignment_name;
 485                           $$.exclude_name_list = NULL;
 486                           $$.section_flag_list = NULL;
 487                         }
 488         |       SORT_BY_ALIGNMENT '(' SORT_BY_ALIGNMENT '(' wildcard_name ')' ')'
 489                         {
 490                           $$.name = $5;
 491                           $$.sorted = by_alignment;
 492                           $$.exclude_name_list = NULL;
 493                           $$.section_flag_list = NULL;
 494                         }
 495         |       SORT_BY_NAME '(' EXCLUDE_FILE '(' exclude_name_list ')' wildcard_name ')'
 496                         {
 497                           $$.name = $7;
 498                           $$.sorted = by_name;
 499                           $$.exclude_name_list = $5;
 500                           $$.section_flag_list = NULL;
 501                         }
 502         |       SORT_BY_INIT_PRIORITY '(' wildcard_name ')'
 503                         {
 504                           $$.name = $3;
 505                           $$.sorted = by_init_priority;
 506                           $$.exclude_name_list = NULL;
 507                           $$.section_flag_list = NULL;
 508                         }
 509         ;
 510
 511 sect_flag_list: NAME
 512                         {
 513                           struct flag_info_list *n;
 514                           n = ((struct flag_info_list *) xmalloc (sizeof *n));
 515                           if ($1[0] == '!')
 516                             {
 517                               n->with = without_flags;
 518                               n->name = &$1[1];
 519                             }
 520                           else
 521                             {
 522                               n->with = with_flags;
 523                               n->name = $1;
 524                             }
 525                           n->valid = FALSE;
 526                           n->next = NULL;
 527                           $$ = n;
 528                         }
 529         |       sect_flag_list '&' NAME
 530                         {
 531                           struct flag_info_list *n;
 532                           n = ((struct flag_info_list *) xmalloc (sizeof *n));
 533                           if ($3[0] == '!')
 534                             {
 535                               n->with = without_flags;
 536                               n->name = &$3[1];
 537                             }
 538                           else
 539                             {
 540                               n->with = with_flags;
 541                               n->name = $3;
 542                             }
 543                           n->valid = FALSE;
 544                           n->next = $1;
 545                           $$ = n;
 546                         }
 547         ;
 548
 549 sect_flags:
 550                 INPUT_SECTION_FLAGS '(' sect_flag_list ')'
 551                         {
 552                           struct flag_info *n;
 553                           n = ((struct flag_info *) xmalloc (sizeof *n));
 554                           n->flag_list = $3;
 555                           n->flags_initialized = FALSE;
 556                           n->not_with_flags = 0;
 557                           n->only_with_flags = 0;
 558                           $$ = n;
 559                         }
 560         ;
 561
 562 exclude_name_list:
 563                 exclude_name_list wildcard_name
 564                         {
 565                           struct name_list *tmp;
 566                           tmp = (struct name_list *) xmalloc (sizeof *tmp);
 567                           tmp->name = $2;
 568                           tmp->next = $1;
 569                           $$ = tmp;
 570                         }
 571         |
 572                 wildcard_name
 573                         {
 574                           struct name_list *tmp;
 575                           tmp = (struct name_list *) xmalloc (sizeof *tmp);
 576                           tmp->name = $1;
 577                           tmp->next = NULL;
 578                           $$ = tmp;
 579                         }
 580         ;
 581
 582 file_NAME_list:
 583                 file_NAME_list opt_comma wildcard_spec
 584                         {
 585                           struct wildcard_list *tmp;
 586                           tmp = (struct wildcard_list *) xmalloc (sizeof *tmp);
 587                           tmp->next = $1;
 588                           tmp->spec = $3;
 589                           $$ = tmp;
 590                         }
 591         |
 592                 wildcard_spec
 593                         {
 594                           struct wildcard_list *tmp;
 595                           tmp = (struct wildcard_list *) xmalloc (sizeof *tmp);
 596                           tmp->next = NULL;
 597                           tmp->spec = $1;
 598                           $$ = tmp;
 599                         }
 600         ;
 601
 602 input_section_spec_no_keep:
 603                 NAME
 604                         {
 605                           struct wildcard_spec tmp;
 606                           tmp.name = $1;
 607                           tmp.exclude_name_list = NULL;
 608                           tmp.sorted = none;
 609                           tmp.section_flag_list = NULL;
 610                           lang_add_wild (&tmp, NULL, ldgram_had_keep);
 611                         }
 612         |       sect_flags NAME
 613                         {
 614                           struct wildcard_spec tmp;
 615                           tmp.name = $2;
 616                           tmp.exclude_name_list = NULL;
 617                           tmp.sorted = none;
 618                           tmp.section_flag_list = $1;
 619                           lang_add_wild (&tmp, NULL, ldgram_had_keep);
 620                         }
 621         |       '[' file_NAME_list ']'
 622                         {
 623                           lang_add_wild (NULL, $2, ldgram_had_keep);
 624                         }
 625         |       sect_flags '[' file_NAME_list ']'
 626                         {
 627                           struct wildcard_spec tmp;
 628                           tmp.name = NULL;
 629                           tmp.exclude_name_list = NULL;
 630                           tmp.sorted = none;
 631                           tmp.section_flag_list = $1;
 632                           lang_add_wild (&tmp, $3, ldgram_had_keep);
 633                         }
 634         |       wildcard_spec '(' file_NAME_list ')'
 635                         {
 636                           lang_add_wild (&$1, $3, ldgram_had_keep);
 637                         }
 638         |       sect_flags wildcard_spec '(' file_NAME_list ')'
 639                         {
 640                           $2.section_flag_list = $1;
 641                           lang_add_wild (&$2, $4, ldgram_had_keep);
 642                         }
 643         ;
 644
 645 input_section_spec:
 646                 input_section_spec_no_keep
 647         |       KEEP '('
 648                         { ldgram_had_keep = TRUE; }
 649                 input_section_spec_no_keep ')'
 650                         { ldgram_had_keep = FALSE; }
 651         ;
 652
 653 statement:
 654                 assignment end
 655         |       CREATE_OBJECT_SYMBOLS
 656                 {
 657                 lang_add_attribute(lang_object_symbols_statement_enum);
 658                 }
 659         |       ';'
 660         |       CONSTRUCTORS
 661                 {
 662
 663                   lang_add_attribute(lang_constructors_statement_enum);
 664                 }
 665         | SORT_BY_NAME '(' CONSTRUCTORS ')'
 666                 {
 667                   constructors_sorted = TRUE;
 668                   lang_add_attribute (lang_constructors_statement_enum);
 669                 }
 670         | input_section_spec
 671         | length '(' mustbe_exp ')'
 672                         {
 673                           lang_add_data ((int) $1, $3);
 674                         }
 675
 676         | FILL '(' fill_exp ')'
 677                         {
 678                           lang_add_fill ($3);
 679                         }
 680         | ASSERT_K  {ldlex_expression ();} '(' exp ',' NAME ')' end
 681                         { ldlex_popstate ();
 682                           lang_add_assignment (exp_assert ($4, $6)); }
 683         | INCLUDE filename
 684                 { ldlex_script (); ldfile_open_command_file($2); }
 685                 statement_list_opt END
 686                 { ldlex_popstate (); }
 687         ;
 688
 689 statement_list:
 690                 statement_list statement
 691         |       statement
 692         ;
 693
 694 statement_list_opt:
 695                 /* empty */
 696         |       statement_list
 697         ;
 698
 699 length:
 700                 QUAD
 701                         { $$ = $1; }
 702         |       SQUAD
 703                         { $$ = $1; }
 704         |       LONG
 705                         { $$ = $1; }
 706         |       SHORT
 707                         { $$ = $1; }
 708         |       BYTE
 709                         { $$ = $1; }
 710         ;
 711
 712 fill_exp:
 713         mustbe_exp
 714                 {
 715                   $$ = exp_get_fill ($1, 0, "fill value");
 716                 }
 717         ;
 718
 719 fill_opt:
 720           '=' fill_exp
 721                 { $$ = $2; }
 722         |       { $$ = (fill_type *) 0; }
 723         ;
 724
 725 assign_op:
 726                 PLUSEQ
 727                         { $$ = '+'; }
 728         |       MINUSEQ
 729                         { $$ = '-'; }
 730         |       MULTEQ
 731                         { $$ = '*'; }
 732         |       DIVEQ
 733                         { $$ = '/'; }
 734         |       LSHIFTEQ
 735                         { $$ = LSHIFT; }
 736         |       RSHIFTEQ
 737                         { $$ = RSHIFT; }
 738         |       ANDEQ
 739                         { $$ = '&'; }
 740         |       OREQ
 741                         { $$ = '|'; }
 742
 743         ;
 744
 745 end:    ';' | ','
 746         ;
 747
 748
 749 assignment:
 750                 NAME '=' mustbe_exp
 751                 {
 752                   lang_add_assignment (exp_assign ($1, $3));
 753                 }
 754         |       NAME assign_op mustbe_exp
 755                 {
 756                   lang_add_assignment (exp_assign ($1,
 757                                                    exp_binop ($2,
 758                                                               exp_nameop (NAME,
 759                                                                           $1),
 760                                                               $3)));
 761                 }
 762         |       PROVIDE '(' NAME '=' mustbe_exp ')'
 763                 {
 764                   lang_add_assignment (exp_provide ($3, $5, FALSE));
 765                 }
 766         |       PROVIDE_HIDDEN '(' NAME '=' mustbe_exp ')'
 767                 {
 768                   lang_add_assignment (exp_provide ($3, $5, TRUE));
 769                 }
 770         ;
 771
 772
 773 opt_comma:
 774                 ','     |       ;
 775
 776
 777 memory:
 778                 MEMORY '{' memory_spec_list_opt '}'
 779         ;
 780
 781 memory_spec_list_opt: memory_spec_list | ;
 782
 783 memory_spec_list:
 784                 memory_spec_list opt_comma memory_spec
 785         |       memory_spec
 786         ;
 787
 788
 789 memory_spec:    NAME
 790                 { region = lang_memory_region_lookup ($1, TRUE); }
 791                 attributes_opt ':'
 792                 origin_spec opt_comma length_spec
 793                 {}
 794         |       INCLUDE filename
 795                 { ldlex_script (); ldfile_open_command_file($2); }
 796                 memory_spec_list_opt END
 797                 { ldlex_popstate (); }
 798         ;
 799
 800 origin_spec:
 801         ORIGIN '=' mustbe_exp
 802                 {
 803                   region->origin = exp_get_vma ($3, 0, "origin");
 804                   region->current = region->origin;
 805                 }
 806         ;
 807
 808 length_spec:
 809              LENGTH '=' mustbe_exp
 810                 {
 811                   region->length = exp_get_vma ($3, -1, "length");
 812                 }
 813         ;
 814
 815 attributes_opt:
 816                 /* empty */
 817                   { /* dummy action to avoid bison 1.25 error message */ }
 818         |       '(' attributes_list ')'
 819         ;
 820
 821 attributes_list:
 822                 attributes_string
 823         |       attributes_list attributes_string
 824         ;
 825
 826 attributes_string:
 827                 NAME
 828                   { lang_set_flags (region, $1, 0); }
 829         |       '!' NAME
 830                   { lang_set_flags (region, $2, 1); }
 831         ;
 832
 833 startup:
 834         STARTUP '(' filename ')'
 835                 { lang_startup($3); }
 836         ;
 837
 838 high_level_library:
 839                 HLL '(' high_level_library_NAME_list ')'
 840         |       HLL '(' ')'
 841                         { ldemul_hll((char *)NULL); }
 842         ;
 843
 844 high_level_library_NAME_list:
 845                 high_level_library_NAME_list opt_comma filename
 846                         { ldemul_hll($3); }
 847         |       filename
 848                         { ldemul_hll($1); }
 849
 850         ;
 851
 852 low_level_library:
 853         SYSLIB '(' low_level_library_NAME_list ')'
 854         ; low_level_library_NAME_list:
 855                 low_level_library_NAME_list opt_comma filename
 856                         { ldemul_syslib($3); }
 857         |
 858         ;
 859
 860 floating_point_support:
 861                 FLOAT
 862                         { lang_float(TRUE); }
 863         |       NOFLOAT
 864                         { lang_float(FALSE); }
 865         ;
 866
 867 nocrossref_list:
 868                 /* empty */
 869                 {
 870                   $$ = NULL;
 871                 }
 872         |       NAME nocrossref_list
 873                 {
 874                   struct lang_nocrossref *n;
 875
 876                   n = (struct lang_nocrossref *) xmalloc (sizeof *n);
 877                   n->name = $1;
 878                   n->next = $2;
 879                   $$ = n;
 880                 }
 881         |       NAME ',' nocrossref_list
 882                 {
 883                   struct lang_nocrossref *n;
 884
 885                   n = (struct lang_nocrossref *) xmalloc (sizeof *n);
 886                   n->name = $1;
 887                   n->next = $3;
 888                   $$ = n;
 889                 }
 890         ;
 891
 892 mustbe_exp:              { ldlex_expression (); }
 893                 exp
 894                          { ldlex_popstate (); $$=$2;}
 895         ;
 896
 897 exp     :
 898                 '-' exp %prec UNARY
 899                         { $$ = exp_unop ('-', $2); }
 900         |       '(' exp ')'
 901                         { $$ = $2; }
 902         |       NEXT '(' exp ')' %prec UNARY
 903                         { $$ = exp_unop ((int) $1,$3); }
 904         |       '!' exp %prec UNARY
 905                         { $$ = exp_unop ('!', $2); }
 906         |       '+' exp %prec UNARY
 907                         { $$ = $2; }
 908         |       '~' exp %prec UNARY
 909                         { $$ = exp_unop ('~', $2);}
 910
 911         |       exp '*' exp
 912                         { $$ = exp_binop ('*', $1, $3); }
 913         |       exp '/' exp
 914                         { $$ = exp_binop ('/', $1, $3); }
 915         |       exp '%' exp
 916                         { $$ = exp_binop ('%', $1, $3); }
 917         |       exp '+' exp
 918                         { $$ = exp_binop ('+', $1, $3); }
 919         |       exp '-' exp
 920                         { $$ = exp_binop ('-' , $1, $3); }
 921         |       exp LSHIFT exp
 922                         { $$ = exp_binop (LSHIFT , $1, $3); }
 923         |       exp RSHIFT exp
 924                         { $$ = exp_binop (RSHIFT , $1, $3); }
 925         |       exp EQ exp
 926                         { $$ = exp_binop (EQ , $1, $3); }
 927         |       exp NE exp
 928                         { $$ = exp_binop (NE , $1, $3); }
 929         |       exp LE exp
 930                         { $$ = exp_binop (LE , $1, $3); }
 931         |       exp GE exp
 932                         { $$ = exp_binop (GE , $1, $3); }
 933         |       exp '<' exp
 934                         { $$ = exp_binop ('<' , $1, $3); }
 935         |       exp '>' exp
 936                         { $$ = exp_binop ('>' , $1, $3); }
 937         |       exp '&' exp
 938                         { $$ = exp_binop ('&' , $1, $3); }
 939         |       exp '^' exp
 940                         { $$ = exp_binop ('^' , $1, $3); }
 941         |       exp '|' exp
 942                         { $$ = exp_binop ('|' , $1, $3); }
 943         |       exp '?' exp ':' exp
 944                         { $$ = exp_trinop ('?' , $1, $3, $5); }
 945         |       exp ANDAND exp
 946                         { $$ = exp_binop (ANDAND , $1, $3); }
 947         |       exp OROR exp
 948                         { $$ = exp_binop (OROR , $1, $3); }
 949         |       DEFINED '(' NAME ')'
 950                         { $$ = exp_nameop (DEFINED, $3); }
 951         |       INT
 952                         { $$ = exp_bigintop ($1.integer, $1.str); }
 953         |       SIZEOF_HEADERS
 954                         { $$ = exp_nameop (SIZEOF_HEADERS,0); }
 955
 956         |       ALIGNOF '(' NAME ')'
 957                         { $$ = exp_nameop (ALIGNOF,$3); }
 958         |       SIZEOF '(' NAME ')'
 959                         { $$ = exp_nameop (SIZEOF,$3); }
 960         |       ADDR '(' NAME ')'
 961                         { $$ = exp_nameop (ADDR,$3); }
 962         |       LOADADDR '(' NAME ')'
 963                         { $$ = exp_nameop (LOADADDR,$3); }
 964         |       CONSTANT '(' NAME ')'
 965                         { $$ = exp_nameop (CONSTANT,$3); }
 966         |       ABSOLUTE '(' exp ')'
 967                         { $$ = exp_unop (ABSOLUTE, $3); }
 968         |       ALIGN_K '(' exp ')'
 969                         { $$ = exp_unop (ALIGN_K,$3); }
 970         |       ALIGN_K '(' exp ',' exp ')'
 971                         { $$ = exp_binop (ALIGN_K,$3,$5); }
 972         |       DATA_SEGMENT_ALIGN '(' exp ',' exp ')'
 973                         { $$ = exp_binop (DATA_SEGMENT_ALIGN, $3, $5); }
 974         |       DATA_SEGMENT_RELRO_END '(' exp ',' exp ')'
 975                         { $$ = exp_binop (DATA_SEGMENT_RELRO_END, $5, $3); }
 976         |       DATA_SEGMENT_END '(' exp ')'
 977                         { $$ = exp_unop (DATA_SEGMENT_END, $3); }
 978         |       SEGMENT_START '(' NAME ',' exp ')'
 979                         { /* The operands to the expression node are
 980                              placed in the opposite order from the way
 981                              in which they appear in the script as
 982                              that allows us to reuse more code in
 983                              fold_binary.  */
 984                           $$ = exp_binop (SEGMENT_START,
 985                                           $5,
 986                                           exp_nameop (NAME, $3)); }
 987         |       BLOCK '(' exp ')'
 988                         { $$ = exp_unop (ALIGN_K,$3); }
 989         |       NAME
 990                         { $$ = exp_nameop (NAME,$1); }
 991         |       MAX_K '(' exp ',' exp ')'
 992                         { $$ = exp_binop (MAX_K, $3, $5 ); }
 993         |       MIN_K '(' exp ',' exp ')'
 994                         { $$ = exp_binop (MIN_K, $3, $5 ); }
 995         |       ASSERT_K '(' exp ',' NAME ')'
 996                         { $$ = exp_assert ($3, $5); }
 997         |       ORIGIN '(' NAME ')'
 998                         { $$ = exp_nameop (ORIGIN, $3); }
 999         |       LENGTH '(' NAME ')'
1000                         { $$ = exp_nameop (LENGTH, $3); }
1001         ;
1002
1003
1004 memspec_at_opt:
1005                 AT '>' NAME { $$ = $3; }
1006         |       { $$ = 0; }
1007         ;
1008
1009 opt_at:
1010                 AT '(' exp ')' { $$ = $3; }
1011         |       { $$ = 0; }
1012         ;
1013
1014 opt_align:
1015                 ALIGN_K '(' exp ')' { $$ = $3; }
1016         |       { $$ = 0; }
1017         ;
1018
1019 opt_subalign:
1020                 SUBALIGN '(' exp ')' { $$ = $3; }
1021         |       { $$ = 0; }
1022         ;
1023
1024 sect_constraint:
1025                 ONLY_IF_RO { $$ = ONLY_IF_RO; }
1026         |       ONLY_IF_RW { $$ = ONLY_IF_RW; }
1027         |       SPECIAL { $$ = SPECIAL; }
1028         |       { $$ = 0; }
1029         ;
1030
1031 section:        NAME            { ldlex_expression(); }
1032                 opt_exp_with_type
1033                 opt_at
1034                 opt_align
1035                 opt_subalign    { ldlex_popstate (); ldlex_script (); }
1036                 sect_constraint
1037                 '{'
1038                         {
1039                           lang_enter_output_section_statement($1, $3,
1040                                                               sectype,
1041                                                               $5, $6, $4, $8);
1042                         }
1043                 statement_list_opt
1044                 '}' { ldlex_popstate (); ldlex_expression (); }
1045                 memspec_opt memspec_at_opt phdr_opt fill_opt
1046                 {
1047                   ldlex_popstate ();
1048                   lang_leave_output_section_statement ($17, $14, $16, $15);
1049                 }
1050                 opt_comma
1051                 {}
1052         |       OVERLAY
1053                         { ldlex_expression (); }
1054                 opt_exp_without_type opt_nocrossrefs opt_at opt_subalign
1055                         { ldlex_popstate (); ldlex_script (); }
1056                 '{'
1057                         {
1058                           lang_enter_overlay ($3, $6);
1059                         }
1060                 overlay_section
1061                 '}'
1062                         { ldlex_popstate (); ldlex_expression (); }
1063                 memspec_opt memspec_at_opt phdr_opt fill_opt
1064                         {
1065                           ldlex_popstate ();
1066                           lang_leave_overlay ($5, (int) $4,
1067                                               $16, $13, $15, $14);
1068                         }
1069                 opt_comma
1070         |       /* The GROUP case is just enough to support the gcc
1071                    svr3.ifile script.  It is not intended to be full
1072                    support.  I'm not even sure what GROUP is supposed
1073                    to mean.  */
1074                 GROUP { ldlex_expression (); }
1075                 opt_exp_with_type
1076                 {
1077                   ldlex_popstate ();
1078                   lang_add_assignment (exp_assign (".", $3));
1079                 }
1080                 '{' sec_or_group_p1 '}'
1081         |       INCLUDE filename
1082                 { ldlex_script (); ldfile_open_command_file($2); }
1083                 sec_or_group_p1 END
1084                 { ldlex_popstate (); }
1085         ;
1086
1087 type:
1088            NOLOAD  { sectype = noload_section; }
1089         |  DSECT   { sectype = noalloc_section; }
1090         |  COPY    { sectype = noalloc_section; }
1091         |  INFO    { sectype = noalloc_section; }
1092         |  OVERLAY { sectype = noalloc_section; }
1093         ;
1094
1095 atype:
1096                 '(' type ')'
1097         |       /* EMPTY */ { sectype = normal_section; }
1098         |       '(' ')' { sectype = normal_section; }
1099         ;
1100
1101 opt_exp_with_type:
1102                 exp atype ':'           { $$ = $1; }
1103         |       atype ':'               { $$ = (etree_type *)NULL;  }
1104         |       /* The BIND cases are to support the gcc svr3.ifile
1105                    script.  They aren't intended to implement full
1106                    support for the BIND keyword.  I'm not even sure
1107                    what BIND is supposed to mean.  */
1108                 BIND '(' exp ')' atype ':' { $$ = $3; }
1109         |       BIND '(' exp ')' BLOCK '(' exp ')' atype ':'
1110                 { $$ = $3; }
1111         ;
1112
1113 opt_exp_without_type:
1114                 exp ':'         { $$ = $1; }
1115         |       ':'             { $$ = (etree_type *) NULL;  }
1116         ;
1117
1118 opt_nocrossrefs:
1119                 /* empty */
1120                         { $$ = 0; }
1121         |       NOCROSSREFS
1122                         { $$ = 1; }
1123         ;
1124
1125 memspec_opt:
1126                 '>' NAME
1127                 { $$ = $2; }
1128         |       { $$ = DEFAULT_MEMORY_REGION; }
1129         ;
1130
1131 phdr_opt:
1132                 /* empty */
1133                 {
1134                   $$ = NULL;
1135                 }
1136         |       phdr_opt ':' NAME
1137                 {
1138                   struct lang_output_section_phdr_list *n;
1139
1140                   n = ((struct lang_output_section_phdr_list *)
1141                        xmalloc (sizeof *n));
1142                   n->name = $3;
1143                   n->used = FALSE;
1144                   n->next = $1;
1145                   $$ = n;
1146                 }
1147         ;
1148
1149 overlay_section:
1150                 /* empty */
1151         |       overlay_section
1152                 NAME
1153                         {
1154                           ldlex_script ();
1155                           lang_enter_overlay_section ($2);
1156                         }
1157                 '{' statement_list_opt '}'
1158                         { ldlex_popstate (); ldlex_expression (); }
1159                 phdr_opt fill_opt
1160                         {
1161                           ldlex_popstate ();
1162                           lang_leave_overlay_section ($9, $8);
1163                         }
1164                 opt_comma
1165         ;
1166
1167 phdrs:
1168                 PHDRS '{' phdr_list '}'
1169         ;
1170
1171 phdr_list:
1172                 /* empty */
1173         |       phdr_list phdr
1174         ;
1175
1176 phdr:
1177                 NAME { ldlex_expression (); }
1178                   phdr_type phdr_qualifiers { ldlex_popstate (); }
1179                   ';'
1180                 {
1181                   lang_new_phdr ($1, $3, $4.filehdr, $4.phdrs, $4.at,
1182                                  $4.flags);
1183                 }
1184         ;
1185
1186 phdr_type:
1187                 exp
1188                 {
1189                   $$ = $1;
1190
1191                   if ($1->type.node_class == etree_name
1192                       && $1->type.node_code == NAME)
1193                     {
1194                       const char *s;
1195                       unsigned int i;
1196                       static const char * const phdr_types[] =
1197                         {
1198                           "PT_NULL", "PT_LOAD", "PT_DYNAMIC",
1199                           "PT_INTERP", "PT_NOTE", "PT_SHLIB",
1200                           "PT_PHDR", "PT_TLS"
1201                         };
1202
1203                       s = $1->name.name;
1204                       for (i = 0;
1205                            i < sizeof phdr_types / sizeof phdr_types[0];
1206                            i++)
1207                         if (strcmp (s, phdr_types[i]) == 0)
1208                           {
1209                             $$ = exp_intop (i);
1210                             break;
1211                           }
1212                       if (i == sizeof phdr_types / sizeof phdr_types[0])
1213                         {
1214                           if (strcmp (s, "PT_GNU_EH_FRAME") == 0)
1215                             $$ = exp_intop (0x6474e550);
1216                           else if (strcmp (s, "PT_GNU_STACK") == 0)
1217                             $$ = exp_intop (0x6474e551);
1218                           else
1219                             {
1220                               einfo (_("\
1221 %X%P:%S: unknown phdr type `%s' (try integer literal)\n"),
1222                                      NULL, s);
1223                               $$ = exp_intop (0);
1224                             }
1225                         }
1226                     }
1227                 }
1228         ;
1229
1230 phdr_qualifiers:
1231                 /* empty */
1232                 {
1233                   memset (&$$, 0, sizeof (struct phdr_info));
1234                 }
1235         |       NAME phdr_val phdr_qualifiers
1236                 {
1237                   $$ = $3;
1238                   if (strcmp ($1, "FILEHDR") == 0 && $2 == NULL)
1239                     $$.filehdr = TRUE;
1240                   else if (strcmp ($1, "PHDRS") == 0 && $2 == NULL)
1241                     $$.phdrs = TRUE;
1242                   else if (strcmp ($1, "FLAGS") == 0 && $2 != NULL)
1243                     $$.flags = $2;
1244                   else
1245                     einfo (_("%X%P:%S: PHDRS syntax error at `%s'\n"),
1246                            NULL, $1);
1247                 }
1248         |       AT '(' exp ')' phdr_qualifiers
1249                 {
1250                   $$ = $5;
1251                   $$.at = $3;
1252                 }
1253         ;
1254
1255 phdr_val:
1256                 /* empty */
1257                 {
1258                   $$ = NULL;
1259                 }
1260         | '(' exp ')'
1261                 {
1262                   $$ = $2;
1263                 }
1264         ;
1265
1266 dynamic_list_file:
1267                 {
1268                   ldlex_version_file ();
1269                   PUSH_ERROR (_("dynamic list"));
1270                 }
1271                 dynamic_list_nodes
1272                 {
1273                   ldlex_popstate ();
1274                   POP_ERROR ();
1275                 }
1276         ;
1277
1278 dynamic_list_nodes:
1279                 dynamic_list_node
1280         |       dynamic_list_nodes dynamic_list_node
1281         ;
1282
1283 dynamic_list_node:
1284                 '{' dynamic_list_tag '}' ';'
1285         ;
1286
1287 dynamic_list_tag:
1288                 vers_defns ';'
1289                 {
1290                   lang_append_dynamic_list ($1);
1291                 }
1292         ;
1293
1294 /* This syntax is used within an external version script file.  */
1295
1296 version_script_file:
1297                 {
1298                   ldlex_version_file ();
1299                   PUSH_ERROR (_("VERSION script"));
1300                 }
1301                 vers_nodes
1302                 {
1303                   ldlex_popstate ();
1304                   POP_ERROR ();
1305                 }
1306         ;
1307
1308 /* This is used within a normal linker script file.  */
1309
1310 version:
1311                 {
1312                   ldlex_version_script ();
1313                 }
1314                 VERSIONK '{' vers_nodes '}'
1315                 {
1316                   ldlex_popstate ();
1317                 }
1318         ;
1319
1320 vers_nodes:
1321                 vers_node
1322         |       vers_nodes vers_node
1323         ;
1324
1325 vers_node:
1326                 '{' vers_tag '}' ';'
1327                 {
1328                   lang_register_vers_node (NULL, $2, NULL);
1329                 }
1330         |       VERS_TAG '{' vers_tag '}' ';'
1331                 {
1332                   lang_register_vers_node ($1, $3, NULL);
1333                 }
1334         |       VERS_TAG '{' vers_tag '}' verdep ';'
1335                 {
1336                   lang_register_vers_node ($1, $3, $5);
1337                 }
1338         ;
1339
1340 verdep:
1341                 VERS_TAG
1342                 {
1343                   $$ = lang_add_vers_depend (NULL, $1);
1344                 }
1345         |       verdep VERS_TAG
1346                 {
1347                   $$ = lang_add_vers_depend ($1, $2);
1348                 }
1349         ;
1350
1351 vers_tag:
1352                 /* empty */
1353                 {
1354                   $$ = lang_new_vers_node (NULL, NULL);
1355                 }
1356         |       vers_defns ';'
1357                 {
1358                   $$ = lang_new_vers_node ($1, NULL);
1359                 }
1360         |       GLOBAL ':' vers_defns ';'
1361                 {
1362                   $$ = lang_new_vers_node ($3, NULL);
1363                 }
1364         |       LOCAL ':' vers_defns ';'
1365                 {
1366                   $$ = lang_new_vers_node (NULL, $3);
1367                 }
1368         |       GLOBAL ':' vers_defns ';' LOCAL ':' vers_defns ';'
1369                 {
1370                   $$ = lang_new_vers_node ($3, $7);
1371                 }
1372         ;
1373
1374 vers_defns:
1375                 VERS_IDENTIFIER
1376                 {
1377                   $$ = lang_new_vers_pattern (NULL, $1, ldgram_vers_current_lang, FALSE);
1378                 }
1379         |       NAME
1380                 {
1381                   $$ = lang_new_vers_pattern (NULL, $1, ldgram_vers_current_lang, TRUE);
1382                 }
1383         |       vers_defns ';' VERS_IDENTIFIER
1384                 {
1385                   $$ = lang_new_vers_pattern ($1, $3, ldgram_vers_current_lang, FALSE);
1386                 }
1387         |       vers_defns ';' NAME
1388                 {
1389                   $$ = lang_new_vers_pattern ($1, $3, ldgram_vers_current_lang, TRUE);
1390                 }
1391         |       vers_defns ';' EXTERN NAME '{'
1392                         {
1393                           $<name>$ = ldgram_vers_current_lang;
1394                           ldgram_vers_current_lang = $4;
1395                         }
1396                 vers_defns opt_semicolon '}'
1397                         {
1398                           struct bfd_elf_version_expr *pat;
1399                           for (pat = $7; pat->next != NULL; pat = pat->next);
1400                           pat->next = $1;
1401                           $$ = $7;
1402                           ldgram_vers_current_lang = $<name>6;
1403                         }
1404         |       EXTERN NAME '{'
1405                         {
1406                           $<name>$ = ldgram_vers_current_lang;
1407                           ldgram_vers_current_lang = $2;
1408                         }
1409                 vers_defns opt_semicolon '}'
1410                         {
1411                           $$ = $5;
1412                           ldgram_vers_current_lang = $<name>4;
1413                         }
1414         |       GLOBAL
1415                 {
1416                   $$ = lang_new_vers_pattern (NULL, "global", ldgram_vers_current_lang, FALSE);
1417                 }
1418         |       vers_defns ';' GLOBAL
1419                 {
1420                   $$ = lang_new_vers_pattern ($1, "global", ldgram_vers_current_lang, FALSE);
1421                 }
1422         |       LOCAL
1423                 {
1424                   $$ = lang_new_vers_pattern (NULL, "local", ldgram_vers_current_lang, FALSE);
1425                 }
1426         |       vers_defns ';' LOCAL
1427                 {
1428                   $$ = lang_new_vers_pattern ($1, "local", ldgram_vers_current_lang, FALSE);
1429                 }
1430         |       EXTERN
1431                 {
1432                   $$ = lang_new_vers_pattern (NULL, "extern", ldgram_vers_current_lang, FALSE);
1433                 }
1434         |       vers_defns ';' EXTERN
1435                 {
1436                   $$ = lang_new_vers_pattern ($1, "extern", ldgram_vers_current_lang, FALSE);
1437                 }
1438         ;
1439
1440 opt_semicolon:
1441                 /* empty */
1442         |       ';'
1443         ;
1444
1445 %%
1446 void
1447 yyerror(arg)
1448      const char *arg;
1449 {
1450   if (ldfile_assumed_script)
1451     einfo (_("%P:%s: file format not recognized; treating as linker script\n"),
1452            ldlex_filename ());
1453   if (error_index > 0 && error_index < ERROR_NAME_MAX)
1454     einfo ("%P%F:%S: %s in %s\n", NULL, arg, error_names[error_index - 1]);
1455   else
1456     einfo ("%P%F:%S: %s\n", NULL, arg);
1457 }