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 extern int g_switch_value;
  47 boolean hex_mode;
  48 static int typebits;
  49 strip_symbols_type strip_symbols=STRIP_NONE;
  50 discard_locals_type discard_locals=DISCARD_NONE;
  51
  52
  53 lang_memory_region_type *region;
  54
  55
  56 lang_memory_region_type *lang_memory_region_lookup();
  57 lang_output_section_statement_type *lang_output_section_statement_lookup();
  58 etree_type *lang_atin();
  59 #ifdef __STDC__
  60
  61 void lang_add_data(int type, union etree_union *exp);
  62 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*, etree_type*);
  63
  64 #else
  65
  66 void lang_add_data();
  67 void lang_enter_output_section_statement();
  68
  69 #endif /* __STDC__ */
  70
  71 extern args_type command_line;
  72 char *current_file;
  73 boolean ldgram_want_filename = true;
  74 boolean had_script = false;
  75 boolean force_make_executable = false;
  76
  77 boolean ldgram_in_script = false;
  78 boolean ldgram_had_equals = false;
  79 /* LOCALS */
  80
  81
  82 #define ERROR_NAME_MAX 20
  83 static char *error_names[ERROR_NAME_MAX];
  84 static int error_index;
  85 #define PUSH_ERROR(x) if (error_index < ERROR_NAME_MAX) error_names[error_index] = x; error_index++;
  86 #define POP_ERROR()   error_index--;
  87 %}
  88 %union {
  89   bfd_vma integer;
  90   int voidval;
  91   char *name;
  92   int token;
  93   union etree_union *etree;
  94   struct sec *section;
  95   struct lang_output_section_statement_struct *output_section_statement;
  96   union  lang_statement_union **statement_ptr;
  97   int lineno;
  98   struct {
  99     FILE *file;
 100     char *name;
 101     unsigned int lineno;
 102   } state;
 103
 104
 105 }
 106
 107 %type <etree> exp  opt_exp_with_type  mustbe_exp opt_at
 108 %type <integer> fill_opt
 109 %type <name> memspec_opt
 110 %token <integer> INT
 111 %token <name> NAME
 112 %type  <integer> length
 113
 114 %right <token> PLUSEQ MINUSEQ MULTEQ DIVEQ  '=' LSHIFTEQ RSHIFTEQ   ANDEQ OREQ
 115 %right <token> '?' ':'
 116 %left <token> OROR
 117 %left <token>  ANDAND
 118 %left <token> '|'
 119 %left <token>  '^'
 120 %left  <token> '&'
 121 %left <token>  EQ NE
 122 %left  <token> '<' '>' LE GE
 123 %left  <token> LSHIFT RSHIFT
 124
 125 %left  <token> '+' '-'
 126 %left  <token> '*' '/' '%'
 127
 128 /*%token <token> '+' '-' '*' '/' '%'*/
 129 %right UNARY
 130 %token END
 131 %left <token> '('
 132 %token <token> ALIGN_K BLOCK LONG SHORT BYTE
 133 %token SECTIONS
 134 %token '{' '}'
 135 %token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH
 136 %token SIZEOF_HEADERS
 137 %token INCLUDE
 138 %token MEMORY  DEFSYMEND
 139 %token NOLOAD DSECT COPY INFO OVERLAY
 140 %token NAME DEFINED TARGET_K SEARCH_DIR MAP ENTRY
 141 %token OPTION_e OPTION_c OPTION_noinhibit_exec OPTION_s OPTION_S OPTION_sort_common
 142 %token OPTION_EB OPTION_EL OPTION_G OPTION_Gval
 143 %token OPTION_format  OPTION_F OPTION_u OPTION_Bstatic OPTION_N
 144 %token <integer> SIZEOF NEXT ADDR
 145 %token OPTION_d OPTION_dc OPTION_dp OPTION_x OPTION_X OPTION_defsym
 146 %token OPTION_v OPTION_V OPTION_m OPTION_memul OPTION_M OPTION_t STARTUP HLL SYSLIB FLOAT  NOFLOAT
 147 %token OPTION_Map
 148 %token OPTION_n OPTION_r OPTION_o OPTION_b  OPTION_R OPTION_relax
 149 %token <name> OPTION_l OPTION_L OPTION_T OPTION_Aarch OPTION_Tfile  OPTION_Texp
 150 %token <name> OPTION_y
 151 %token OPTION_Ur
 152 %token ORIGIN FILL OPTION_g
 153 %token LENGTH    CREATE_OBJECT_SYMBOLS INPUT OUTPUT  CONSTRUCTORS
 154 %token OPTION_RETAIN_SYMBOLS_FILE ALIGNMOD AT
 155
 156 %type <token> assign_op
 157
 158 %type <name>  filename
 159
 160
 161 %token CHIP LIST SECT ABSOLUTE  LOAD NEWLINE ENDWORD ORDER NAMEWORD
 162 %token FORMAT PUBLIC DEFSYMEND BASE ALIAS TRUNCATE
 163
 164 %{
 165 ld_config_type config;
 166 %}
 167
 168 %%
 169
 170 file:   command_line  { lang_final(); };
 171
 172
 173 filename:  NAME;
 174
 175
 176 command_line:
 177                 command_line command_line_option
 178         |
 179         ;
 180
 181 command_line_option:
 182                 OPTION_Bstatic { }
 183         |       OPTION_v
 184                         {
 185                         ldversion(0);
 186                         option_v = true;
 187                         }
 188         |       OPTION_V
 189                         {
 190                         ldversion(1);
 191                         option_v = true;
 192                         }
 193         |       OPTION_t {
 194                         trace_files = true;
 195                         }
 196         |     OPTION_Map  NAME
 197                 {
 198                 write_map = true;
 199                 config.map_filename = $2;
 200                 }
 201         |       OPTION_m NAME
 202                 {
 203                   /* Ignore.  */
 204                 }
 205         |       OPTION_memul
 206                 {
 207                   /* Ignore.  */
 208                 }
 209         |       OPTION_M
 210                 {
 211                   config.map_filename = "-";
 212                 }
 213         |       OPTION_n {
 214                         config.magic_demand_paged = false;
 215                         }
 216         |       OPTION_N {
 217                         config.text_read_only = false;
 218                         config.magic_demand_paged = false;
 219                         }
 220         |       OPTION_s {
 221                         strip_symbols = STRIP_ALL;
 222                         }
 223         |       OPTION_S {
 224                         strip_symbols = STRIP_DEBUGGER;
 225                         }
 226         |       OPTION_u NAME {
 227                         ldlang_add_undef($2);
 228                 }
 229
 230         |       OPTION_r {
 231                         config.relocateable_output = true;
 232                         config.build_constructors = false;
 233                         config.magic_demand_paged = false;
 234                         config.text_read_only = false;
 235                         }
 236         |       OPTION_Ur {
 237                         config.relocateable_output = true;
 238                         config.build_constructors = true;
 239                         config.magic_demand_paged = false;
 240                         config.text_read_only = false;
 241                       }
 242         |       OPTION_o filename
 243                         {
 244                         lang_add_output($2);
 245                         }
 246         |       OPTION_e NAME
 247                         { lang_add_entry($2);
 248                         }
 249         |       OPTION_X {
 250                         discard_locals = DISCARD_L;
 251                 }
 252         |       OPTION_x {
 253                         discard_locals = DISCARD_ALL;
 254                 }
 255
 256         |       OPTION_noinhibit_exec
 257                         {
 258                         force_make_executable = true;
 259                         }
 260         |      OPTION_sort_common {
 261         config.sort_common = true;
 262       }
 263         |      OPTION_d {
 264                           command_line.force_common_definition = true;
 265                         }
 266
 267         |      OPTION_relax {
 268                           command_line.relax = true;
 269                         }
 270         |      OPTION_dc
 271                          {
 272                           command_line.force_common_definition = true;
 273                         }
 274         |       OPTION_g
 275                         {
 276                         /* Ignored */
 277                         }
 278         |       OPTION_dp
 279                          {
 280                           command_line.force_common_definition = true;
 281                         }
 282         |       OPTION_format NAME
 283                    {
 284                           lang_add_target($2);
 285                    }
 286         |       OPTION_Texp
 287                 { ldlex_expression();
 288                         hex_mode  = 16;
 289                 }
 290                 INT
 291                 {  ldlex_popstate();
 292                         lang_section_start($1,exp_intop($3));
 293                         hex_mode = 0;
 294                 }
 295         |       OPTION_y
 296                         {
 297                         add_ysym($1);
 298                         }
 299         |       OPTION_Aarch
 300                 {
 301                         ldfile_add_arch($1);
 302                 }
 303         |        OPTION_b NAME
 304                         {
 305                         lang_add_target($2);
 306                         }
 307         |       OPTION_L
 308                         {
 309                         ldfile_add_library_path($1);
 310                         }
 311         |       OPTION_F
 312                 {
 313                 /* Ignore */
 314                 }
 315         |       OPTION_c filename
 316                         { ldfile_open_command_file($2); } mri_script_file  END {  ldlex_command();}
 317
 318         |       OPTION_Tfile
 319                         { ldfile_open_command_file($1); } script_file
 320                         END {  ldlex_command();}
 321
 322         |       OPTION_T filename
 323                         { ldfile_open_command_file($2); } script_file
 324                 END {  ldlex_command();}
 325
 326         |       OPTION_l
 327                         {
 328                           lang_add_input_file($1,
 329                                          lang_input_file_is_l_enum,
 330                                          (char *)NULL);
 331                         }
 332         |       OPTION_R filename
 333                         {
 334                         lang_add_input_file($2,
 335                                 lang_input_file_is_symbols_only_enum,
 336                                 (char *)NULL);
 337                         }
 338
 339         |       OPTION_defsym  { ldlex_defsym(); }
 340                 NAME     '=' exp  DEFSYMEND { ldlex_popstate();
 341                         lang_add_assignment(exp_assop($4,$3,$5));
 342                         }
 343         |       OPTION_RETAIN_SYMBOLS_FILE filename
 344                 { lang_add_keepsyms_file ($2); }
 345         |       OPTION_EB
 346                 {
 347                   /* FIXME: This is currently ignored.  It means
 348                      ``produce a big-endian object file''.  It could
 349                      be used to select an output format.  */
 350                 }
 351         |       OPTION_EL
 352                 {
 353                   /* FIXME: This is currently ignored.  It means
 354                      ``produce a little-endian object file''.  It could
 355                      be used to select an output format.  */
 356                 }
 357         |       OPTION_G NAME
 358                 {
 359                   g_switch_value = atoi ($2);
 360                 }
 361         |       OPTION_Gval
 362                 {
 363                   g_switch_value = yylval.integer;
 364                 }
 365         | '-' NAME
 366                  { einfo("%P%F illegal option -- %s\n", $2);  }
 367         |       NAME
 368                 { lang_add_input_file($1,lang_input_file_is_file_enum,
 369                                  (char *)NULL); }
 370         | '{' script_file '}'
 371         ;
 372
 373
 374 /* SYNTAX WITHIN AN MRI SCRIPT FILE */
 375 mri_script_file:
 376                 {       ldlex_mri_script();
 377                         PUSH_ERROR("MRI style script");
 378                 }
 379              mri_script_lines
 380                 {       ldlex_popstate();
 381                         POP_ERROR();
 382                 }
 383         ;
 384
 385 mri_script_lines:
 386                 mri_script_lines mri_script_command NEWLINE
 387           |
 388         ;
 389
 390 mri_script_command:
 391                 CHIP  exp
 392         |       CHIP  exp ',' exp
 393         |       NAME    {
 394                         einfo("%P%F: unrecognised keyword in MRI style script '%s'\n",$1);
 395                         }
 396         |       LIST    {
 397                         write_map = true;
 398                         config.map_filename = "-";
 399                         }
 400         |       ORDER ordernamelist
 401         |       ENDWORD
 402         |       PUBLIC NAME '=' exp
 403                         { mri_public($2, $4); }
 404         |       PUBLIC NAME ',' exp
 405                         { mri_public($2, $4); }
 406         |       PUBLIC NAME  exp
 407                         { mri_public($2, $3); }
 408         |       FORMAT NAME
 409                         { mri_format($2); }
 410         |       SECT NAME ',' exp
 411                         { mri_output_section($2, $4);}
 412         |       SECT NAME  exp
 413                         { mri_output_section($2, $3);}
 414         |       SECT NAME '=' exp
 415                         { mri_output_section($2, $4);}
 416         |       ALIGN_K NAME '=' exp
 417                         { mri_align($2,$4); }
 418         |       ALIGNMOD NAME '=' exp
 419                         { mri_alignmod($2,$4); }
 420         |       ABSOLUTE mri_abs_name_list
 421         |       LOAD     mri_load_name_list
 422         |       NAMEWORD NAME
 423                         { mri_name($2); }
 424         |       ALIAS NAME ',' NAME
 425                         { mri_alias($2,$4,0);}
 426         |       ALIAS NAME ',' INT
 427                         { mri_alias($2,0,$4);}
 428         |       BASE     exp
 429                         { mri_base($2); }
 430         |       TRUNCATE INT
 431                 {  mri_truncate($2); }
 432         |
 433         ;
 434
 435 ordernamelist:
 436               ordernamelist ',' NAME         { mri_order($3); }
 437         |     ordernamelist  NAME         { mri_order($2); }
 438         |
 439         ;
 440
 441 mri_load_name_list:
 442                 NAME
 443                         { mri_load($1); }
 444         |       mri_load_name_list ',' NAME { mri_load($3); }
 445         ;
 446
 447 mri_abs_name_list:
 448                 NAME
 449                         { mri_only_load($1); }
 450         |       mri_abs_name_list ','  NAME
 451                         { mri_only_load($3); }
 452         ;
 453
 454 script_file:
 455         {
 456          ldlex_both();
 457         }
 458        ifile_list
 459         {
 460         ldlex_popstate();
 461         }
 462         ;
 463
 464
 465 ifile_list:
 466        ifile_list ifile_p1
 467         |
 468         ;
 469
 470
 471
 472 ifile_p1:
 473                 memory
 474         |       sections
 475         |       startup
 476         |       high_level_library
 477         |       low_level_library
 478         |       floating_point_support
 479         |       statement_anywhere
 480         |        ';'
 481         |       TARGET_K '(' NAME ')'
 482                 { lang_add_target($3); }
 483         |       SEARCH_DIR '(' filename ')'
 484                 { ldfile_add_library_path($3); }
 485         |       OUTPUT '(' filename ')'
 486                 { lang_add_output($3); }
 487         | OUTPUT_FORMAT '(' NAME ')'
 488                   { lang_add_output_format($3); }
 489         | OUTPUT_ARCH '(' NAME ')'
 490                   { ldfile_set_output_arch($3); }
 491         |       FORCE_COMMON_ALLOCATION
 492                 { command_line.force_common_definition = true ; }
 493         |       INPUT '(' input_list ')'
 494         |       MAP '(' filename ')'
 495                 { lang_add_map($3); }
 496         |       INCLUDE filename
 497                 { ldfile_open_command_file($2); } ifile_list END
 498         ;
 499
 500 input_list:
 501                 NAME
 502                 { lang_add_input_file($1,lang_input_file_is_file_enum,
 503                                  (char *)NULL); }
 504         |       input_list ',' NAME
 505                 { lang_add_input_file($3,lang_input_file_is_file_enum,
 506                                  (char *)NULL); }
 507         |       input_list NAME
 508                 { lang_add_input_file($2,
 509 lang_input_file_is_file_enum,
 510                                  (char *)NULL); }
 511         ;
 512
 513 sections:
 514                 SECTIONS '{' sec_or_group_p1 '}'
 515         ;
 516
 517 sec_or_group_p1:
 518                 sec_or_group_p1 section
 519         |       sec_or_group_p1 statement_anywhere
 520         |
 521         ;
 522
 523 statement_anywhere:
 524                 ENTRY '(' NAME ')'
 525                 { lang_add_entry($3); }
 526         |       assignment end
 527         ;
 528
 529 file_NAME_list:
 530                 NAME
 531                         { lang_add_wild($1, current_file); }
 532         |       file_NAME_list opt_comma NAME
 533                         { lang_add_wild($3, current_file); }
 534         ;
 535
 536 input_section_spec:
 537                 NAME
 538                 {
 539                 lang_add_wild((char *)NULL, $1);
 540                 }
 541         |       '['
 542                         {
 543                         current_file = (char *)NULL;
 544                         }
 545                         file_NAME_list
 546                 ']'
 547         |       NAME
 548                         {
 549                         current_file =$1;
 550                         }
 551                 '(' file_NAME_list ')'
 552         |       '*'
 553                         {
 554                         current_file = (char *)NULL;
 555                         }
 556                 '(' file_NAME_list ')'
 557         ;
 558
 559 statement:
 560                 assignment end
 561         |       CREATE_OBJECT_SYMBOLS
 562                 {
 563                 lang_add_attribute(lang_object_symbols_statement_enum);
 564                 }
 565         |       ';'
 566         |       CONSTRUCTORS
 567                 {
 568
 569                   lang_add_attribute(lang_constructors_statement_enum);
 570                 }
 571         | input_section_spec
 572         | length '(' exp ')'
 573                         {
 574                         lang_add_data($1,$3);
 575                         }
 576
 577         | FILL '(' exp ')'
 578                         {
 579                           lang_add_fill
 580                             (exp_get_value_int($3,
 581                                                0,
 582                                                "fill value",
 583                                                lang_first_phase_enum));
 584                         }
 585         ;
 586
 587 statement_list:
 588                 statement_list statement
 589         |       statement
 590         ;
 591
 592 statement_list_opt:
 593                 /* empty */
 594         |       statement_list
 595         ;
 596
 597 length:
 598                 LONG
 599                         { $$ = $1; }
 600         |       SHORT
 601                         { $$ = $1; }
 602         |       BYTE
 603                         { $$ = $1; }
 604         ;
 605
 606 fill_opt:
 607           '=' mustbe_exp
 608                 {
 609                   $$ =   exp_get_value_int($2,
 610                                            0,
 611                                            "fill value",
 612                                            lang_first_phase_enum);
 613                 }
 614         |       { $$ = 0; }
 615         ;
 616
 617
 618
 619 assign_op:
 620                 PLUSEQ
 621                         { $$ = '+'; }
 622         |       MINUSEQ
 623                         { $$ = '-'; }
 624         |       MULTEQ
 625                         { $$ = '*'; }
 626         |       DIVEQ
 627                         { $$ = '/'; }
 628         |       LSHIFTEQ
 629                         { $$ = LSHIFT; }
 630         |       RSHIFTEQ
 631                         { $$ = RSHIFT; }
 632         |       ANDEQ
 633                         { $$ = '&'; }
 634         |       OREQ
 635                         { $$ = '|'; }
 636
 637         ;
 638
 639 end:    ';' | ','
 640         ;
 641
 642
 643 assignment:
 644                 NAME '=' mustbe_exp
 645                 {
 646                   lang_add_assignment(exp_assop($2,$1,$3));
 647                 }
 648         |       NAME assign_op mustbe_exp
 649                 {
 650
 651 lang_add_assignment(exp_assop('=',$1,exp_binop($2,exp_nameop(NAME,$1),$3)));
 652                 }
 653
 654         ;
 655
 656
 657 opt_comma:
 658                 ','     |       ;
 659
 660
 661 memory:
 662                 MEMORY '{' memory_spec memory_spec_list '}'
 663         ;
 664
 665 memory_spec_list:
 666                 memory_spec_list memory_spec
 667         |       memory_spec_list ',' memory_spec
 668         |
 669         ;
 670
 671
 672 memory_spec:            NAME
 673                         { region = lang_memory_region_lookup($1); }
 674                 attributes_opt ':'
 675                 origin_spec opt_comma length_spec
 676
 677         ; origin_spec:
 678         ORIGIN '=' mustbe_exp
 679                 { region->current =
 680                  region->origin =
 681                  exp_get_vma($3, 0L,"origin", lang_first_phase_enum);
 682 }
 683         ; length_spec:
 684              LENGTH '=' mustbe_exp
 685                { region->length = exp_get_vma($3,
 686                                                ~((bfd_vma)0),
 687                                                "length",
 688                                                lang_first_phase_enum);
 689                 }
 690
 691
 692 attributes_opt:
 693                   '(' NAME ')'
 694                         {
 695                         lang_set_flags(&region->flags, $2);
 696                         }
 697         |
 698
 699         ;
 700
 701 startup:
 702         STARTUP '(' filename ')'
 703                 { lang_startup($3); }
 704         ;
 705
 706 high_level_library:
 707                 HLL '(' high_level_library_NAME_list ')'
 708         |       HLL '(' ')'
 709                         { ldemul_hll((char *)NULL); }
 710         ;
 711
 712 high_level_library_NAME_list:
 713                 high_level_library_NAME_list opt_comma filename
 714                         { ldemul_hll($3); }
 715         |       filename
 716                         { ldemul_hll($1); }
 717
 718         ;
 719
 720 low_level_library:
 721         SYSLIB '(' low_level_library_NAME_list ')'
 722         ; low_level_library_NAME_list:
 723                 low_level_library_NAME_list opt_comma filename
 724                         { ldemul_syslib($3); }
 725         |
 726         ;
 727
 728 floating_point_support:
 729                 FLOAT
 730                         { lang_float(true); }
 731         |       NOFLOAT
 732                         { lang_float(false); }
 733         ;
 734
 735
 736 mustbe_exp:              { ldlex_expression(); }
 737                 exp
 738                          { ldlex_popstate(); $$=$2;}
 739         ;
 740
 741 exp     :
 742                 '-' exp %prec UNARY
 743                         { $$ = exp_unop('-', $2); }
 744         |       '(' exp ')'
 745                         { $$ = $2; }
 746         |       NEXT '(' exp ')' %prec UNARY
 747                         { $$ = exp_unop($1,$3); }
 748         |       '!' exp %prec UNARY
 749                         { $$ = exp_unop('!', $2); }
 750         |       '+' exp %prec UNARY
 751                         { $$ = $2; }
 752         |       '~' exp %prec UNARY
 753                         { $$ = exp_unop('~', $2);}
 754
 755         |       exp '*' exp
 756                         { $$ = exp_binop('*', $1, $3); }
 757         |       exp '/' exp
 758                         { $$ = exp_binop('/', $1, $3); }
 759         |       exp '%' exp
 760                         { $$ = exp_binop('%', $1, $3); }
 761         |       exp '+' exp
 762                         { $$ = exp_binop('+', $1, $3); }
 763         |       exp '-' exp
 764                         { $$ = exp_binop('-' , $1, $3); }
 765         |       exp LSHIFT exp
 766                         { $$ = exp_binop(LSHIFT , $1, $3); }
 767         |       exp RSHIFT exp
 768                         { $$ = exp_binop(RSHIFT , $1, $3); }
 769         |       exp EQ exp
 770                         { $$ = exp_binop(EQ , $1, $3); }
 771         |       exp NE exp
 772                         { $$ = exp_binop(NE , $1, $3); }
 773         |       exp LE exp
 774                         { $$ = exp_binop(LE , $1, $3); }
 775         |       exp GE exp
 776                         { $$ = exp_binop(GE , $1, $3); }
 777         |       exp '<' exp
 778                         { $$ = exp_binop('<' , $1, $3); }
 779         |       exp '>' exp
 780                         { $$ = exp_binop('>' , $1, $3); }
 781         |       exp '&' exp
 782                         { $$ = exp_binop('&' , $1, $3); }
 783         |       exp '^' exp
 784                         { $$ = exp_binop('^' , $1, $3); }
 785         |       exp '|' exp
 786                         { $$ = exp_binop('|' , $1, $3); }
 787         |       exp '?' exp ':' exp
 788                         { $$ = exp_trinop('?' , $1, $3, $5); }
 789         |       exp ANDAND exp
 790                         { $$ = exp_binop(ANDAND , $1, $3); }
 791         |       exp OROR exp
 792                         { $$ = exp_binop(OROR , $1, $3); }
 793         |       DEFINED '(' NAME ')'
 794                         { $$ = exp_nameop(DEFINED, $3); }
 795         |       INT
 796                         { $$ = exp_intop($1); }
 797         |       SIZEOF_HEADERS
 798                         { $$ = exp_nameop(SIZEOF_HEADERS,0); }
 799
 800         |       SIZEOF '(' NAME ')'
 801                         { $$ = exp_nameop(SIZEOF,$3); }
 802         |       ADDR '(' NAME ')'
 803                         { $$ = exp_nameop(ADDR,$3); }
 804         |       ABSOLUTE '(' exp ')'
 805                         { $$ = exp_unop(ABSOLUTE, $3); }
 806         |       ALIGN_K '(' exp ')'
 807                         { $$ = exp_unop(ALIGN_K,$3); }
 808         |       NAME
 809                         { $$ = exp_nameop(NAME,$1); }
 810         ;
 811
 812
 813 opt_at:
 814                 AT '(' exp ')' { $$ = $3; }
 815         |       { $$ = 0; }
 816         ;
 817
 818 section:        NAME            { ldlex_expression(); }
 819                 opt_exp_with_type
 820                 opt_at          { ldlex_popstate(); }
 821                 '{'
 822                         {
 823                         lang_enter_output_section_statement($1,$3,typebits,0,0,0,$4);
 824                         }
 825                 statement_list_opt
 826                 '}' {ldlex_expression();} fill_opt memspec_opt
 827                 {
 828                   ldlex_popstate();
 829                   lang_leave_output_section_statement($11, $12);
 830                 }
 831 opt_comma
 832
 833         ;
 834
 835 type:
 836            NOLOAD  { typebits = SEC_NEVER_LOAD; }
 837         |  DSECT   { typebits = 0; }
 838         |  COPY    { typebits = 0; }
 839         |  INFO    { typebits = 0; }
 840         |  OVERLAY { typebits = 0; }
 841         | { typebits = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; }
 842         ;
 843
 844
 845 opt_exp_with_type:
 846                 exp ':'                 { $$ = $1; typebits =0;}
 847         |       exp '(' type ')' ':'    { $$ = $1; }
 848         |       ':'                     { $$= (etree_type *)NULL; typebits = 0; }
 849         |       '(' type ')' ':'        { $$= (etree_type *)NULL;  }
 850         ;
 851
 852 memspec_opt:
 853                 '>' NAME
 854                 { $$ = $2; }
 855         |       { $$ = "*default*"; }
 856         ;
 857 %%
 858 void
 859 yyerror(arg)
 860 char *arg;
 861 {
 862   if (error_index> 0  && error_index < ERROR_NAME_MAX)
 863      einfo("%P%F: %S syntax error in %s\n",error_names[error_index-1]);
 864   else
 865      einfo("%P%F: %S syntax error\n");
 866 }