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                 {
 367                   if (*$1 == '-')
 368                     einfo("%P%F: illegal option -- %s\n", $1);
 369                   else
 370                     lang_add_input_file($1,lang_input_file_is_file_enum,
 371                                         (char *)NULL);
 372                 }
 373         | '{' script_file '}'
 374         ;
 375
 376
 377 /* SYNTAX WITHIN AN MRI SCRIPT FILE */
 378 mri_script_file:
 379                 {       ldlex_mri_script();
 380                         PUSH_ERROR("MRI style script");
 381                 }
 382              mri_script_lines
 383                 {       ldlex_popstate();
 384                         POP_ERROR();
 385                 }
 386         ;
 387
 388 mri_script_lines:
 389                 mri_script_lines mri_script_command NEWLINE
 390           |
 391         ;
 392
 393 mri_script_command:
 394                 CHIP  exp
 395         |       CHIP  exp ',' exp
 396         |       NAME    {
 397                         einfo("%P%F: unrecognised keyword in MRI style script '%s'\n",$1);
 398                         }
 399         |       LIST    {
 400                         write_map = true;
 401                         config.map_filename = "-";
 402                         }
 403         |       ORDER ordernamelist
 404         |       ENDWORD
 405         |       PUBLIC NAME '=' exp
 406                         { mri_public($2, $4); }
 407         |       PUBLIC NAME ',' exp
 408                         { mri_public($2, $4); }
 409         |       PUBLIC NAME  exp
 410                         { mri_public($2, $3); }
 411         |       FORMAT NAME
 412                         { mri_format($2); }
 413         |       SECT NAME ',' exp
 414                         { mri_output_section($2, $4);}
 415         |       SECT NAME  exp
 416                         { mri_output_section($2, $3);}
 417         |       SECT NAME '=' exp
 418                         { mri_output_section($2, $4);}
 419         |       ALIGN_K NAME '=' exp
 420                         { mri_align($2,$4); }
 421         |       ALIGNMOD NAME '=' exp
 422                         { mri_alignmod($2,$4); }
 423         |       ABSOLUTE mri_abs_name_list
 424         |       LOAD     mri_load_name_list
 425         |       NAMEWORD NAME
 426                         { mri_name($2); }
 427         |       ALIAS NAME ',' NAME
 428                         { mri_alias($2,$4,0);}
 429         |       ALIAS NAME ',' INT
 430                         { mri_alias($2,0,$4);}
 431         |       BASE     exp
 432                         { mri_base($2); }
 433         |       TRUNCATE INT
 434                 {  mri_truncate($2); }
 435         |
 436         ;
 437
 438 ordernamelist:
 439               ordernamelist ',' NAME         { mri_order($3); }
 440         |     ordernamelist  NAME         { mri_order($2); }
 441         |
 442         ;
 443
 444 mri_load_name_list:
 445                 NAME
 446                         { mri_load($1); }
 447         |       mri_load_name_list ',' NAME { mri_load($3); }
 448         ;
 449
 450 mri_abs_name_list:
 451                 NAME
 452                         { mri_only_load($1); }
 453         |       mri_abs_name_list ','  NAME
 454                         { mri_only_load($3); }
 455         ;
 456
 457 script_file:
 458         {
 459          ldlex_both();
 460         }
 461        ifile_list
 462         {
 463         ldlex_popstate();
 464         }
 465         ;
 466
 467
 468 ifile_list:
 469        ifile_list ifile_p1
 470         |
 471         ;
 472
 473
 474
 475 ifile_p1:
 476                 memory
 477         |       sections
 478         |       startup
 479         |       high_level_library
 480         |       low_level_library
 481         |       floating_point_support
 482         |       statement_anywhere
 483         |        ';'
 484         |       TARGET_K '(' NAME ')'
 485                 { lang_add_target($3); }
 486         |       SEARCH_DIR '(' filename ')'
 487                 { ldfile_add_library_path($3); }
 488         |       OUTPUT '(' filename ')'
 489                 { lang_add_output($3); }
 490         | OUTPUT_FORMAT '(' NAME ')'
 491                   { lang_add_output_format($3); }
 492         | OUTPUT_ARCH '(' NAME ')'
 493                   { ldfile_set_output_arch($3); }
 494         |       FORCE_COMMON_ALLOCATION
 495                 { command_line.force_common_definition = true ; }
 496         |       INPUT '(' input_list ')'
 497         |       MAP '(' filename ')'
 498                 { lang_add_map($3); }
 499         |       INCLUDE filename
 500                 { ldfile_open_command_file($2); } ifile_list END
 501         ;
 502
 503 input_list:
 504                 NAME
 505                 { lang_add_input_file($1,lang_input_file_is_file_enum,
 506                                  (char *)NULL); }
 507         |       input_list ',' NAME
 508                 { lang_add_input_file($3,lang_input_file_is_file_enum,
 509                                  (char *)NULL); }
 510         |       input_list NAME
 511                 { lang_add_input_file($2,
 512 lang_input_file_is_file_enum,
 513                                  (char *)NULL); }
 514         ;
 515
 516 sections:
 517                 SECTIONS '{' sec_or_group_p1 '}'
 518         ;
 519
 520 sec_or_group_p1:
 521                 sec_or_group_p1 section
 522         |       sec_or_group_p1 statement_anywhere
 523         |
 524         ;
 525
 526 statement_anywhere:
 527                 ENTRY '(' NAME ')'
 528                 { lang_add_entry($3); }
 529         |       assignment end
 530         ;
 531
 532 file_NAME_list:
 533                 NAME
 534                         { lang_add_wild($1, current_file); }
 535         |       file_NAME_list opt_comma NAME
 536                         { lang_add_wild($3, current_file); }
 537         ;
 538
 539 input_section_spec:
 540                 NAME
 541                 {
 542                 lang_add_wild((char *)NULL, $1);
 543                 }
 544         |       '['
 545                         {
 546                         current_file = (char *)NULL;
 547                         }
 548                         file_NAME_list
 549                 ']'
 550         |       NAME
 551                         {
 552                         current_file =$1;
 553                         }
 554                 '(' file_NAME_list ')'
 555         |       '*'
 556                         {
 557                         current_file = (char *)NULL;
 558                         }
 559                 '(' file_NAME_list ')'
 560         ;
 561
 562 statement:
 563                 assignment end
 564         |       CREATE_OBJECT_SYMBOLS
 565                 {
 566                 lang_add_attribute(lang_object_symbols_statement_enum);
 567                 }
 568         |       ';'
 569         |       CONSTRUCTORS
 570                 {
 571
 572                   lang_add_attribute(lang_constructors_statement_enum);
 573                 }
 574         | input_section_spec
 575         | length '(' exp ')'
 576                         {
 577                         lang_add_data($1,$3);
 578                         }
 579
 580         | FILL '(' exp ')'
 581                         {
 582                           lang_add_fill
 583                             (exp_get_value_int($3,
 584                                                0,
 585                                                "fill value",
 586                                                lang_first_phase_enum));
 587                         }
 588         ;
 589
 590 statement_list:
 591                 statement_list statement
 592         |       statement
 593         ;
 594
 595 statement_list_opt:
 596                 /* empty */
 597         |       statement_list
 598         ;
 599
 600 length:
 601                 LONG
 602                         { $$ = $1; }
 603         |       SHORT
 604                         { $$ = $1; }
 605         |       BYTE
 606                         { $$ = $1; }
 607         ;
 608
 609 fill_opt:
 610           '=' mustbe_exp
 611                 {
 612                   $$ =   exp_get_value_int($2,
 613                                            0,
 614                                            "fill value",
 615                                            lang_first_phase_enum);
 616                 }
 617         |       { $$ = 0; }
 618         ;
 619
 620
 621
 622 assign_op:
 623                 PLUSEQ
 624                         { $$ = '+'; }
 625         |       MINUSEQ
 626                         { $$ = '-'; }
 627         |       MULTEQ
 628                         { $$ = '*'; }
 629         |       DIVEQ
 630                         { $$ = '/'; }
 631         |       LSHIFTEQ
 632                         { $$ = LSHIFT; }
 633         |       RSHIFTEQ
 634                         { $$ = RSHIFT; }
 635         |       ANDEQ
 636                         { $$ = '&'; }
 637         |       OREQ
 638                         { $$ = '|'; }
 639
 640         ;
 641
 642 end:    ';' | ','
 643         ;
 644
 645
 646 assignment:
 647                 NAME '=' mustbe_exp
 648                 {
 649                   lang_add_assignment(exp_assop($2,$1,$3));
 650                 }
 651         |       NAME assign_op mustbe_exp
 652                 {
 653
 654 lang_add_assignment(exp_assop('=',$1,exp_binop($2,exp_nameop(NAME,$1),$3)));
 655                 }
 656
 657         ;
 658
 659
 660 opt_comma:
 661                 ','     |       ;
 662
 663
 664 memory:
 665                 MEMORY '{' memory_spec memory_spec_list '}'
 666         ;
 667
 668 memory_spec_list:
 669                 memory_spec_list memory_spec
 670         |       memory_spec_list ',' memory_spec
 671         |
 672         ;
 673
 674
 675 memory_spec:            NAME
 676                         { region = lang_memory_region_lookup($1); }
 677                 attributes_opt ':'
 678                 origin_spec opt_comma length_spec
 679
 680         ; origin_spec:
 681         ORIGIN '=' mustbe_exp
 682                 { region->current =
 683                  region->origin =
 684                  exp_get_vma($3, 0L,"origin", lang_first_phase_enum);
 685 }
 686         ; length_spec:
 687              LENGTH '=' mustbe_exp
 688                { region->length = exp_get_vma($3,
 689                                                ~((bfd_vma)0),
 690                                                "length",
 691                                                lang_first_phase_enum);
 692                 }
 693
 694
 695 attributes_opt:
 696                   '(' NAME ')'
 697                         {
 698                         lang_set_flags(&region->flags, $2);
 699                         }
 700         |
 701
 702         ;
 703
 704 startup:
 705         STARTUP '(' filename ')'
 706                 { lang_startup($3); }
 707         ;
 708
 709 high_level_library:
 710                 HLL '(' high_level_library_NAME_list ')'
 711         |       HLL '(' ')'
 712                         { ldemul_hll((char *)NULL); }
 713         ;
 714
 715 high_level_library_NAME_list:
 716                 high_level_library_NAME_list opt_comma filename
 717                         { ldemul_hll($3); }
 718         |       filename
 719                         { ldemul_hll($1); }
 720
 721         ;
 722
 723 low_level_library:
 724         SYSLIB '(' low_level_library_NAME_list ')'
 725         ; low_level_library_NAME_list:
 726                 low_level_library_NAME_list opt_comma filename
 727                         { ldemul_syslib($3); }
 728         |
 729         ;
 730
 731 floating_point_support:
 732                 FLOAT
 733                         { lang_float(true); }
 734         |       NOFLOAT
 735                         { lang_float(false); }
 736         ;
 737
 738
 739 mustbe_exp:              { ldlex_expression(); }
 740                 exp
 741                          { ldlex_popstate(); $$=$2;}
 742         ;
 743
 744 exp     :
 745                 '-' exp %prec UNARY
 746                         { $$ = exp_unop('-', $2); }
 747         |       '(' exp ')'
 748                         { $$ = $2; }
 749         |       NEXT '(' exp ')' %prec UNARY
 750                         { $$ = exp_unop($1,$3); }
 751         |       '!' exp %prec UNARY
 752                         { $$ = exp_unop('!', $2); }
 753         |       '+' exp %prec UNARY
 754                         { $$ = $2; }
 755         |       '~' exp %prec UNARY
 756                         { $$ = exp_unop('~', $2);}
 757
 758         |       exp '*' exp
 759                         { $$ = exp_binop('*', $1, $3); }
 760         |       exp '/' exp
 761                         { $$ = exp_binop('/', $1, $3); }
 762         |       exp '%' exp
 763                         { $$ = exp_binop('%', $1, $3); }
 764         |       exp '+' exp
 765                         { $$ = exp_binop('+', $1, $3); }
 766         |       exp '-' exp
 767                         { $$ = exp_binop('-' , $1, $3); }
 768         |       exp LSHIFT exp
 769                         { $$ = exp_binop(LSHIFT , $1, $3); }
 770         |       exp RSHIFT exp
 771                         { $$ = exp_binop(RSHIFT , $1, $3); }
 772         |       exp EQ exp
 773                         { $$ = exp_binop(EQ , $1, $3); }
 774         |       exp NE exp
 775                         { $$ = exp_binop(NE , $1, $3); }
 776         |       exp LE exp
 777                         { $$ = exp_binop(LE , $1, $3); }
 778         |       exp GE exp
 779                         { $$ = exp_binop(GE , $1, $3); }
 780         |       exp '<' exp
 781                         { $$ = exp_binop('<' , $1, $3); }
 782         |       exp '>' exp
 783                         { $$ = exp_binop('>' , $1, $3); }
 784         |       exp '&' exp
 785                         { $$ = exp_binop('&' , $1, $3); }
 786         |       exp '^' exp
 787                         { $$ = exp_binop('^' , $1, $3); }
 788         |       exp '|' exp
 789                         { $$ = exp_binop('|' , $1, $3); }
 790         |       exp '?' exp ':' exp
 791                         { $$ = exp_trinop('?' , $1, $3, $5); }
 792         |       exp ANDAND exp
 793                         { $$ = exp_binop(ANDAND , $1, $3); }
 794         |       exp OROR exp
 795                         { $$ = exp_binop(OROR , $1, $3); }
 796         |       DEFINED '(' NAME ')'
 797                         { $$ = exp_nameop(DEFINED, $3); }
 798         |       INT
 799                         { $$ = exp_intop($1); }
 800         |       SIZEOF_HEADERS
 801                         { $$ = exp_nameop(SIZEOF_HEADERS,0); }
 802
 803         |       SIZEOF '(' NAME ')'
 804                         { $$ = exp_nameop(SIZEOF,$3); }
 805         |       ADDR '(' NAME ')'
 806                         { $$ = exp_nameop(ADDR,$3); }
 807         |       ABSOLUTE '(' exp ')'
 808                         { $$ = exp_unop(ABSOLUTE, $3); }
 809         |       ALIGN_K '(' exp ')'
 810                         { $$ = exp_unop(ALIGN_K,$3); }
 811         |       NAME
 812                         { $$ = exp_nameop(NAME,$1); }
 813         ;
 814
 815
 816 opt_at:
 817                 AT '(' exp ')' { $$ = $3; }
 818         |       { $$ = 0; }
 819         ;
 820
 821 section:        NAME            { ldlex_expression(); }
 822                 opt_exp_with_type
 823                 opt_at          { ldlex_popstate(); }
 824                 '{'
 825                         {
 826                         lang_enter_output_section_statement($1,$3,typebits,0,0,0,$4);
 827                         }
 828                 statement_list_opt
 829                 '}' {ldlex_expression();} fill_opt memspec_opt
 830                 {
 831                   ldlex_popstate();
 832                   lang_leave_output_section_statement($11, $12);
 833                 }
 834 opt_comma
 835
 836         ;
 837
 838 type:
 839            NOLOAD  { typebits = SEC_NEVER_LOAD; }
 840         |  DSECT   { typebits = 0; }
 841         |  COPY    { typebits = 0; }
 842         |  INFO    { typebits = 0; }
 843         |  OVERLAY { typebits = 0; }
 844         | { typebits = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; }
 845         ;
 846
 847
 848 opt_exp_with_type:
 849                 exp ':'                 { $$ = $1; typebits =0;}
 850         |       exp '(' type ')' ':'    { $$ = $1; }
 851         |       ':'                     { $$= (etree_type *)NULL; typebits = 0; }
 852         |       '(' type ')' ':'        { $$= (etree_type *)NULL;  }
 853         ;
 854
 855 memspec_opt:
 856                 '>' NAME
 857                 { $$ = $2; }
 858         |       { $$ = "*default*"; }
 859         ;
 860 %%
 861 void
 862 yyerror(arg)
 863 char *arg;
 864 {
 865   if (error_index> 0  && error_index < ERROR_NAME_MAX)
 866      einfo("%P%F: %S syntax error in %s\n",error_names[error_index-1]);
 867   else
 868      einfo("%P%F: %S syntax error\n");
 869 }