ld/ldgram.y

   1 /* A YACC grammer to parse a superset of the AT&T linker scripting languaue.
   2    Copyright (C) 1991 Free Software Foundation, Inc.
   3    Written by Steve Chamberlain of Cygnus Support (steve@cygnus.com).
   4
   5 This file is part of GNU ld.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  20
  21 %{
  22 /*
  23
  24  */
  25
  26 #define DONTDECLARE_MALLOC
  27
  28 #include "bfd.h"
  29 #include "sysdep.h"
  30 #include "ld.h"
  31 #include "ldexp.h"
  32 #include "ldver.h"
  33 #include "ldlang.h"
  34 #include "ldemul.h"
  35 #include "ldfile.h"
  36 #include "ldmisc.h"
  37 #include "mri.h"
  38
  39 #define YYDEBUG 1
  40
  41 boolean option_v;
  42 extern unsigned int lineno;
  43 extern boolean trace_files;
  44 extern boolean write_map;
  45 extern boolean option_longmap;
  46 boolean hex_mode;
  47 static int typebits;
  48 strip_symbols_type strip_symbols=STRIP_NONE;
  49 discard_locals_type discard_locals=DISCARD_NONE;
  50
  51
  52 lang_memory_region_type *region;
  53
  54
  55 lang_memory_region_type *lang_memory_region_lookup();
  56 lang_output_section_statement_type *lang_output_section_statement_lookup();
  57
  58 #ifdef __STDC__
  59
  60 void lang_add_data(int type, union etree_union *exp);
  61 void lang_enter_output_section_statement(char *output_section_statement_name, etree_type *address_exp, int flags, bfd_vma block_value,etree_type*,etree_type*);
  62
  63 #else
  64
  65 void lang_add_data();
  66 void lang_enter_output_section_statement();
  67
  68 #endif /* __STDC__ */
  69
  70 extern args_type command_line;
  71 char *current_file;
  72 boolean ldgram_want_filename = true;
  73 boolean had_script = false;
  74 boolean force_make_executable = false;
  75
  76 boolean ldgram_in_script = false;
  77 boolean ldgram_had_equals = false;
  78 /* LOCALS */
  79
  80
  81 #define ERROR_NAME_MAX 20
  82 static char *error_names[ERROR_NAME_MAX];
  83 static int error_index;
  84 #define PUSH_ERROR(x) if (error_index < ERROR_NAME_MAX) error_names[error_index] = x; error_index++;
  85 #define POP_ERROR()   error_index--;
  86 %}
  87 %union {
  88   bfd_vma integer;
  89   int voidval;
  90   char *name;
  91   int token;
  92   union etree_union *etree;
  93 struct sec *section;
  94   struct lang_output_section_statement_struct *output_section_statement;
  95   union  lang_statement_union **statement_ptr;
  96   int lineno;
  97   struct {
  98     FILE *file;
  99     char *name;
 100     unsigned int lineno;
 101   } state;
 102
 103
 104 }
 105
 106 %type <etree> exp  opt_exp_with_type  mustbe_exp
 107 %type <integer> fill_opt
 108 %type <name> memspec_opt
 109 %token <integer> INT
 110 %token <name> NAME
 111 %type  <integer> length
 112
 113 %right <token> PLUSEQ MINUSEQ MULTEQ DIVEQ  '=' LSHIFTEQ RSHIFTEQ   ANDEQ OREQ
 114 %right <token> '?' ':'
 115 %left <token> OROR
 116 %left <token>  ANDAND
 117 %left <token> '|'
 118 %left <token>  '^'
 119 %left  <token> '&'
 120 %left <token>  EQ NE
 121 %left  <token> '<' '>' LE GE
 122 %left  <token> LSHIFT RSHIFT
 123
 124 %left  <token> '+' '-'
 125 %left  <token> '*' '/' '%'
 126
 127 /*%token <token> '+' '-' '*' '/' '%'*/
 128 %right UNARY
 129 %token END
 130 %left <token> '('
 131 %token <token> ALIGN_K BLOCK LONG SHORT BYTE
 132 %token SECTIONS
 133 %token '{' '}'
 134 %token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH
 135 %token SIZEOF_HEADERS
 136 %token INCLUDE
 137 %token MEMORY  DEFSYMEND
 138 %token NOLOAD DSECT COPY INFO OVERLAY
 139 %token NAME DEFINED TARGET_K SEARCH_DIR MAP ENTRY
 140 %token OPTION_e OPTION_c OPTION_noinhibit_exec OPTION_s OPTION_S OPTION_sort_common
 141 %token OPTION_format  OPTION_F OPTION_u OPTION_Bstatic OPTION_N
 142 %token <integer> SIZEOF NEXT ADDR
 143 %token OPTION_d OPTION_dc OPTION_dp OPTION_x OPTION_X OPTION_defsym
 144 %token OPTION_v OPTION_V OPTION_M OPTION_t STARTUP HLL SYSLIB FLOAT  NOFLOAT
 145 %token OPTION_Map
 146 %token OPTION_n OPTION_r OPTION_o OPTION_b  OPTION_R OPTION_relax
 147 %token <name> OPTION_l OPTION_L OPTION_T OPTION_Aarch OPTION_Tfile  OPTION_Texp
 148 %token <name> OPTION_y
 149 %token OPTION_Ur
 150 %token ORIGIN FILL OPTION_g
 151 %token LENGTH    CREATE_OBJECT_SYMBOLS INPUT OUTPUT  CONSTRUCTORS
 152 %token OPTION_RETAIN_SYMBOLS_FILE ALIGNMOD
 153
 154 %type <token> assign_op
 155
 156 %type <name>  filename
 157
 158
 159 %token CHIP LIST SECT ABSOLUTE  LOAD NEWLINE ENDWORD ORDER NAMEWORD
 160 %token FORMAT PUBLIC DEFSYMEND BASE ALIAS TRUNCATE
 161
 162 %{
 163 ld_config_type config;
 164 %}
 165
 166 %%
 167
 168 file:   command_line  { lang_final(); };
 169
 170
 171 filename:  NAME;
 172
 173
 174 command_line:
 175                 command_line command_line_option
 176         |
 177         ;
 178
 179 command_line_option:
 180                 OPTION_Bstatic { }
 181         |       OPTION_v
 182                         {
 183                         ldversion(0);
 184                         option_v = true;
 185                         }
 186         |       OPTION_V
 187                         {
 188                         ldversion(1);
 189                         option_v = true;
 190                         }
 191         |       OPTION_t {
 192                         trace_files = true;
 193                         }
 194         |     OPTION_Map  NAME
 195                 {
 196                 write_map = true;
 197                 config.map_filename = $2;
 198                 }
 199         |       OPTION_M {
 200             config.map_filename = "-";
 201
 202                         }
 203         |       OPTION_n {
 204                         config.magic_demand_paged = false;
 205                         }
 206         |       OPTION_N {
 207                         config.text_read_only = false;
 208                         config.magic_demand_paged = false;
 209                         }
 210         |       OPTION_s {
 211                         strip_symbols = STRIP_ALL;
 212                         }
 213         |       OPTION_S {
 214                         strip_symbols = STRIP_DEBUGGER;
 215                         }
 216         |       OPTION_u NAME {
 217                         ldlang_add_undef($2);
 218                 }
 219
 220         |       OPTION_r {
 221                         config.relocateable_output = true;
 222                         config.build_constructors = false;
 223                         config.magic_demand_paged = false;
 224                         config.text_read_only = false;
 225                         }
 226         |       OPTION_Ur {
 227                         config.relocateable_output = true;
 228                         config.build_constructors = true;
 229                         config.magic_demand_paged = false;
 230                         config.text_read_only = false;
 231                       }
 232         |       OPTION_o filename
 233                         {
 234                         lang_add_output($2);
 235                         }
 236         |       OPTION_e NAME
 237                         { lang_add_entry($2);
 238                         }
 239         |       OPTION_X {
 240                         discard_locals = DISCARD_L;
 241                 }
 242         |       OPTION_x {
 243                         discard_locals = DISCARD_ALL;
 244                 }
 245
 246         |       OPTION_noinhibit_exec
 247                         {
 248                         force_make_executable = true;
 249                         }
 250         |      OPTION_sort_common {
 251         config.sort_common = true;
 252       }
 253         |      OPTION_d {
 254                           command_line.force_common_definition = true;
 255                         }
 256
 257         |      OPTION_relax {
 258                           command_line.relax = true;
 259                         }
 260         |      OPTION_dc
 261                          {
 262                           command_line.force_common_definition = true;
 263                         }
 264         |       OPTION_g
 265                         {
 266                         /* Ignored */
 267                         }
 268         |       OPTION_dp
 269                          {
 270                           command_line.force_common_definition = true;
 271                         }
 272         |       OPTION_format NAME
 273                    {
 274                           lang_add_target($2);
 275                    }
 276         |       OPTION_Texp
 277                 { ldlex_expression();
 278                         hex_mode  = 16;
 279                 }
 280                 INT
 281                 {  ldlex_popstate();
 282                         lang_section_start($1,exp_intop($3));
 283                         hex_mode = 0;
 284                 }
 285         |       OPTION_y
 286                         {
 287                         add_ysym($1);
 288                         }
 289         |       OPTION_Aarch
 290                 {
 291                         ldfile_add_arch($1);
 292                 }
 293         |        OPTION_b NAME
 294                         {
 295                         lang_add_target($2);
 296                         }
 297         |       OPTION_L
 298                         {
 299                         ldfile_add_library_path($1);
 300                         }
 301         |       OPTION_F
 302                 {
 303                 /* Ignore */
 304                 }
 305         |       NAME
 306                 { lang_add_input_file($1,lang_input_file_is_file_enum,
 307                                  (char *)NULL); }
 308         |       OPTION_c filename
 309                         { ldfile_open_command_file($2); } mri_script_file  END {  ldlex_command();}
 310
 311         |       OPTION_Tfile
 312                         { ldfile_open_command_file($1); } script_file
 313                         END {  ldlex_command();}
 314
 315         |       OPTION_T filename
 316                         { ldfile_open_command_file($2); } script_file
 317                 END {  ldlex_command();}
 318
 319         |       OPTION_l
 320                         {
 321                           lang_add_input_file($1,
 322                                          lang_input_file_is_l_enum,
 323                                          (char *)NULL);
 324                         }
 325         |       OPTION_R filename
 326                         {
 327                         lang_add_input_file($2,
 328                                 lang_input_file_is_symbols_only_enum,
 329                                 (char *)NULL);
 330                         }
 331
 332         |       OPTION_defsym  { ldlex_defsym(); }
 333                 NAME     '=' exp  DEFSYMEND { ldlex_popstate();
 334                         lang_add_assignment(exp_assop($4,$3,$5));
 335                         }
 336         |       OPTION_RETAIN_SYMBOLS_FILE filename
 337                 { lang_add_keepsyms_file ($2); }
 338         | '-' NAME
 339                  { info("%P%F Unrecognized option -%s\n", $2);  }
 340
 341         | '{' script_file '}'
 342         ;
 343
 344
 345 /* SYNTAX WITHIN AN MRI SCRIPT FILE */
 346 mri_script_file:
 347                 {       ldlex_mri_script();
 348                         PUSH_ERROR("MRI style script");
 349                 }
 350              mri_script_lines
 351                 {       ldlex_popstate();
 352                         POP_ERROR();
 353                 }
 354         ;
 355
 356 mri_script_lines:
 357                 mri_script_lines mri_script_command NEWLINE
 358           |
 359         ;
 360
 361 mri_script_command:
 362                 CHIP  exp
 363         |       CHIP  exp ',' exp
 364         |       NAME    {
 365                         einfo("%P%F: unrecognised keyword in MRI style script '%s'\n",$1);
 366                         }
 367         |       LIST    {
 368                         write_map = true;
 369                         config.map_filename = "-";
 370                         }
 371         |       ORDER ordernamelist
 372         |       ENDWORD
 373         |       PUBLIC NAME '=' exp
 374                         { mri_public($2, $4); }
 375         |       PUBLIC NAME ',' exp
 376                         { mri_public($2, $4); }
 377         |       PUBLIC NAME  exp
 378                         { mri_public($2, $3); }
 379         |       FORMAT NAME
 380                         { mri_format($2); }
 381         |       SECT NAME ',' exp
 382                         { mri_output_section($2, $4);}
 383         |       SECT NAME  exp
 384                         { mri_output_section($2, $3);}
 385         |       SECT NAME '=' exp
 386                         { mri_output_section($2, $4);}
 387         |       ALIGN_K NAME '=' exp
 388                         { mri_align($2,$4); }
 389         |       ALIGNMOD NAME '=' exp
 390                         { mri_alignmod($2,$4); }
 391         |       ABSOLUTE mri_abs_name_list
 392         |       LOAD     mri_load_name_list
 393         |       NAMEWORD NAME
 394                         { mri_name($2); }
 395         |       ALIAS NAME ',' NAME
 396                         { mri_alias($2,$4,0);}
 397         |       ALIAS NAME ',' INT
 398                         { mri_alias($2,0,$4);}
 399         |       BASE     exp
 400                         { mri_base($2); }
 401         |       TRUNCATE INT
 402                 {  mri_truncate($2); }
 403         |
 404         ;
 405
 406 ordernamelist:
 407               ordernamelist ',' NAME         { mri_order($3); }
 408         |     ordernamelist  NAME         { mri_order($2); }
 409         |
 410         ;
 411
 412 mri_load_name_list:
 413                 NAME
 414                         { mri_load($1); }
 415         |       mri_load_name_list ',' NAME { mri_load($3); }
 416         ;
 417
 418 mri_abs_name_list:
 419                 NAME
 420                         { mri_only_load($1); }
 421         |       mri_abs_name_list ','  NAME
 422                         { mri_only_load($3); }
 423         ;
 424
 425 script_file:
 426         {
 427          ldlex_both();
 428         }
 429        ifile_list
 430         {
 431         ldlex_popstate();
 432         }
 433         ;
 434
 435
 436 ifile_list:
 437        ifile_list ifile_p1
 438         |
 439         ;
 440
 441
 442
 443 ifile_p1:
 444                 memory
 445         |       sections
 446         |       startup
 447         |       high_level_library
 448         |       low_level_library
 449         |       floating_point_support
 450         |       statement_anywhere
 451         |        ';'
 452         |       TARGET_K '(' NAME ')'
 453                 { lang_add_target($3); }
 454         |       SEARCH_DIR '(' filename ')'
 455                 { ldfile_add_library_path($3); }
 456         |       OUTPUT '(' filename ')'
 457                 { lang_add_output($3); }
 458         | OUTPUT_FORMAT '(' NAME ')'
 459                   { lang_add_output_format($3); }
 460         | OUTPUT_ARCH '(' NAME ')'
 461                   { ldfile_set_output_arch($3); }
 462         |       FORCE_COMMON_ALLOCATION
 463                 { command_line.force_common_definition = true ; }
 464         |       INPUT '(' input_list ')'
 465         |       MAP '(' filename ')'
 466                 { lang_add_map($3); }
 467         |       INCLUDE filename
 468                 { ldfile_open_command_file($2); } ifile_list END
 469         ;
 470
 471 input_list:
 472                 NAME
 473                 { lang_add_input_file($1,lang_input_file_is_file_enum,
 474                                  (char *)NULL); }
 475         |       input_list ',' NAME
 476                 { lang_add_input_file($3,lang_input_file_is_file_enum,
 477                                  (char *)NULL); }
 478         |       input_list NAME
 479                 { lang_add_input_file($2,
 480 lang_input_file_is_file_enum,
 481                                  (char *)NULL); }
 482         ;
 483
 484 sections:
 485                 SECTIONS '{' sec_or_group_p1 '}'
 486         ;
 487
 488 sec_or_group_p1:
 489                 sec_or_group_p1 section
 490         |       sec_or_group_p1 statement_anywhere
 491         |
 492         ;
 493
 494 statement_anywhere:
 495                 ENTRY '(' NAME ')'
 496                 { lang_add_entry($3); }
 497         |       assignment end
 498         ;
 499
 500 file_NAME_list:
 501                 NAME
 502                         { lang_add_wild($1, current_file); }
 503         |       file_NAME_list opt_comma NAME
 504                         { lang_add_wild($3, current_file); }
 505         ;
 506
 507 input_section_spec:
 508                 NAME
 509                 {
 510                 lang_add_wild((char *)NULL, $1);
 511                 }
 512         |       '['
 513                         {
 514                         current_file = (char *)NULL;
 515                         }
 516                         file_NAME_list
 517                 ']'
 518         |       NAME
 519                         {
 520                         current_file =$1;
 521                         }
 522                 '(' file_NAME_list ')'
 523         |       '*'
 524                         {
 525                         current_file = (char *)NULL;
 526                         }
 527                 '(' file_NAME_list ')'
 528         ;
 529
 530 statement:
 531                 statement assignment end
 532         |       statement CREATE_OBJECT_SYMBOLS
 533                 {
 534
 535 lang_add_attribute(lang_object_symbols_statement_enum); }
 536         |       statement ';'
 537         |       statement CONSTRUCTORS
 538                 {
 539
 540 lang_add_attribute(lang_constructors_statement_enum); }
 541
 542         |       statement input_section_spec
 543         | statement length '(' exp ')'
 544                         {
 545                         lang_add_data($2,$4);
 546                         }
 547
 548         |       statement FILL '(' exp ')'
 549                         {
 550                           lang_add_fill
 551                             (exp_get_value_int($4,
 552                                                0,
 553                                                "fill value",
 554
 555 lang_first_phase_enum));
 556                         }
 557         |
 558         ;
 559
 560 length:
 561                 LONG
 562                         { $$ = $1; }
 563         |       SHORT
 564                         { $$ = $1; }
 565         |       BYTE
 566                         { $$ = $1; }
 567         ;
 568
 569 fill_opt:
 570           '=' mustbe_exp
 571                 {
 572                   $$ =   exp_get_value_int($2,
 573                                            0,
 574                                            "fill value",
 575                                            lang_first_phase_enum);
 576                 }
 577         |       { $$ = 0; }
 578         ;
 579
 580
 581
 582 assign_op:
 583                 PLUSEQ
 584                         { $$ = '+'; }
 585         |       MINUSEQ
 586                         { $$ = '-'; }
 587         |       MULTEQ
 588                         { $$ = '*'; }
 589         |       DIVEQ
 590                         { $$ = '/'; }
 591         |       LSHIFTEQ
 592                         { $$ = LSHIFT; }
 593         |       RSHIFTEQ
 594                         { $$ = RSHIFT; }
 595         |       ANDEQ
 596                         { $$ = '&'; }
 597         |       OREQ
 598                         { $$ = '|'; }
 599
 600         ;
 601
 602 end:    ';' | ','
 603         ;
 604
 605
 606 assignment:
 607                 NAME '=' mustbe_exp
 608                 {
 609                   lang_add_assignment(exp_assop($2,$1,$3));
 610                 }
 611         |       NAME assign_op mustbe_exp
 612                 {
 613
 614 lang_add_assignment(exp_assop('=',$1,exp_binop($2,exp_nameop(NAME,$1),$3)));
 615                 }
 616
 617         ;
 618
 619
 620 opt_comma:
 621                 ','     |       ;
 622
 623
 624 memory:
 625                 MEMORY '{' memory_spec memory_spec_list '}'
 626         ;
 627
 628 memory_spec_list:
 629                 memory_spec_list memory_spec
 630         |       memory_spec_list ',' memory_spec
 631         |
 632         ;
 633
 634
 635 memory_spec:            NAME
 636                         { region = lang_memory_region_lookup($1); }
 637                 attributes_opt ':'
 638                 origin_spec opt_comma length_spec
 639
 640         ; origin_spec:
 641         ORIGIN '=' mustbe_exp
 642                 { region->current =
 643                  region->origin =
 644                  exp_get_vma($3, 0L,"origin", lang_first_phase_enum);
 645 }
 646         ; length_spec:
 647              LENGTH '=' mustbe_exp
 648                { region->length = exp_get_vma($3,
 649                                                ~((bfd_vma)0),
 650                                                "length",
 651                                                lang_first_phase_enum);
 652                 }
 653
 654
 655 attributes_opt:
 656                   '(' NAME ')'
 657                         {
 658                         lang_set_flags(&region->flags, $2);
 659                         }
 660         |
 661
 662         ;
 663
 664 startup:
 665         STARTUP '(' filename ')'
 666                 { lang_startup($3); }
 667         ;
 668
 669 high_level_library:
 670                 HLL '(' high_level_library_NAME_list ')'
 671         |       HLL '(' ')'
 672                         { ldemul_hll((char *)NULL); }
 673         ;
 674
 675 high_level_library_NAME_list:
 676                 high_level_library_NAME_list opt_comma filename
 677                         { ldemul_hll($3); }
 678         |       filename
 679                         { ldemul_hll($1); }
 680
 681         ;
 682
 683 low_level_library:
 684         SYSLIB '(' low_level_library_NAME_list ')'
 685         ; low_level_library_NAME_list:
 686                 low_level_library_NAME_list opt_comma filename
 687                         { ldemul_syslib($3); }
 688         |
 689         ;
 690
 691 floating_point_support:
 692                 FLOAT
 693                         { lang_float(true); }
 694         |       NOFLOAT
 695                         { lang_float(false); }
 696         ;
 697
 698
 699 mustbe_exp:              { ldlex_expression(); }
 700                 exp
 701                          { ldlex_popstate(); $$=$2;}
 702         ;
 703
 704 exp     :
 705                 '-' exp %prec UNARY
 706                         { $$ = exp_unop('-', $2); }
 707         |       '(' exp ')'
 708                         { $$ = $2; }
 709         |       NEXT '(' exp ')' %prec UNARY
 710                         { $$ = exp_unop($1,$3); }
 711         |       '!' exp %prec UNARY
 712                         { $$ = exp_unop('!', $2); }
 713         |       '+' exp %prec UNARY
 714                         { $$ = $2; }
 715         |       '~' exp %prec UNARY
 716                         { $$ = exp_unop('~', $2);}
 717
 718         |       exp '*' exp
 719                         { $$ = exp_binop('*', $1, $3); }
 720         |       exp '/' exp
 721                         { $$ = exp_binop('/', $1, $3); }
 722         |       exp '%' exp
 723                         { $$ = exp_binop('%', $1, $3); }
 724         |       exp '+' exp
 725                         { $$ = exp_binop('+', $1, $3); }
 726         |       exp '-' exp
 727                         { $$ = exp_binop('-' , $1, $3); }
 728         |       exp LSHIFT exp
 729                         { $$ = exp_binop(LSHIFT , $1, $3); }
 730         |       exp RSHIFT exp
 731                         { $$ = exp_binop(RSHIFT , $1, $3); }
 732         |       exp EQ exp
 733                         { $$ = exp_binop(EQ , $1, $3); }
 734         |       exp NE exp
 735                         { $$ = exp_binop(NE , $1, $3); }
 736         |       exp LE exp
 737                         { $$ = exp_binop(LE , $1, $3); }
 738         |       exp GE exp
 739                         { $$ = exp_binop(GE , $1, $3); }
 740         |       exp '<' exp
 741                         { $$ = exp_binop('<' , $1, $3); }
 742         |       exp '>' exp
 743                         { $$ = exp_binop('>' , $1, $3); }
 744         |       exp '&' exp
 745                         { $$ = exp_binop('&' , $1, $3); }
 746         |       exp '^' exp
 747                         { $$ = exp_binop('^' , $1, $3); }
 748         |       exp '|' exp
 749                         { $$ = exp_binop('|' , $1, $3); }
 750         |       exp '?' exp ':' exp
 751                         { $$ = exp_trinop('?' , $1, $3, $5); }
 752         |       exp ANDAND exp
 753                         { $$ = exp_binop(ANDAND , $1, $3); }
 754         |       exp OROR exp
 755                         { $$ = exp_binop(OROR , $1, $3); }
 756         |       DEFINED '(' NAME ')'
 757                         { $$ = exp_nameop(DEFINED, $3); }
 758         |       INT
 759                         { $$ = exp_intop($1); }
 760         |       SIZEOF_HEADERS
 761                         { $$ = exp_nameop(SIZEOF_HEADERS,0); }
 762
 763         |       SIZEOF '(' NAME ')'
 764                         { $$ = exp_nameop(SIZEOF,$3); }
 765         |       ADDR '(' NAME ')'
 766                         { $$ = exp_nameop(ADDR,$3); }
 767         |       ABSOLUTE '(' exp ')'
 768                         { $$ = exp_unop(ABSOLUTE, $3); }
 769         |       ALIGN_K '(' exp ')'
 770                         { $$ = exp_unop(ALIGN_K,$3); }
 771         |       NAME
 772                         { $$ = exp_nameop(NAME,$1); }
 773         ;
 774
 775
 776
 777
 778 section:        NAME            { ldlex_expression(); }
 779                 opt_exp_with_type       { ldlex_popstate(); }
 780                 '{'
 781                 {
 782                 lang_enter_output_section_statement($1,$3,typebits,0,0,0);
 783                 }
 784                statement
 785                 '}' {ldlex_expression();} fill_opt memspec_opt
 786                 {
 787                   ldlex_popstate();
 788                   lang_leave_output_section_statement($10, $11);
 789                 }
 790 opt_comma
 791
 792         ;
 793
 794 type:
 795            NOLOAD  { typebits = SEC_NEVER_LOAD; }
 796         |  DSECT   { typebits = 0; }
 797         |  COPY    { typebits = 0; }
 798         |  INFO    { typebits = 0; }
 799         |  OVERLAY { typebits = 0; }
 800         | { typebits = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; }
 801         ;
 802
 803
 804 opt_exp_with_type:
 805                 exp ':' { $$ = $1; typebits =0;}
 806         |       exp '(' type ')' ':' { $$ = $1; }
 807         |       ':'     { $$= (etree_type *)NULL; typebits = 0}
 808         ;
 809
 810 memspec_opt:
 811                 '>' NAME
 812                 { $$ = $2; }
 813         |       { $$ = "*default*"; }
 814         ;
 815 %%
 816 void
 817 yyerror(arg)
 818 char *arg;
 819 {
 820   if (error_index> 0  && error_index < ERROR_NAME_MAX)
 821      einfo("%P%F: %S syntax error in %s\n",error_names[error_index-1]);
 822   else
 823      einfo("%P%F: %S syntax error\n");
 824 }