ld/ldgram.y

   1 %{
   2 /*
   3  * $Id$
   4  *
   5  *
   6 */
   7
   8 /*
   9    This is a YACC grammer intended to parse a superset of the AT&T
  10    linker scripting languaue.
  11
  12
  13    Written by Steve Chamberlain steve@cygnus.com
  14 */
  15
  16
  17
  18 #include "sysdep.h"
  19 #include "bfd.h"
  20 #include "ld.h"
  21 #include "ldexp.h"
  22 #include "ldversion.h"
  23 #include "ldlang.h"
  24 #include "ld-emul.h"
  25 #include "ldfile.h"
  26 #include "ldmisc.h"
  27 #define YYDEBUG 1
  28
  29 boolean option_v;
  30 extern unsigned int lineno;
  31 extern boolean trace_files;
  32 extern boolean write_map;
  33
  34 boolean hex_mode;
  35
  36 strip_symbols_type strip_symbols=STRIP_NONE;
  37 discard_locals_type discard_locals=DISCARD_NONE;
  38
  39
  40 lang_memory_region_type *region;
  41
  42
  43 lang_memory_region_type *lang_memory_region_lookup();
  44 lang_output_section_statement_type *lang_output_section_statement_lookup();
  45
  46 #ifdef __STDC__
  47
  48 void lang_add_data(int type, union etree_union *exp);
  49 void lang_enter_output_section_statement(char *output_section_statement_name, etree_type *address_exp, bfd_vma block_value);
  50
  51 #else
  52
  53 void lang_add_data();
  54 void lang_enter_output_section_statement();
  55
  56 #endif /* __STDC__ */
  57
  58 extern args_type command_line;
  59 char *current_file;
  60 boolean ldgram_want_filename = true;
  61 boolean had_script = false;
  62 boolean force_make_executable = false;
  63
  64 boolean ldgram_in_script = false;
  65 boolean ldgram_had_equals = false;
  66 /* LOCALS */
  67
  68
  69
  70
  71 %}
  72 %union {
  73   bfd_vma integer;
  74   int voidval;
  75   char *name;
  76   int token;
  77   union etree_union *etree;
  78   asection *section;
  79   struct lang_output_section_statement_struct *output_section_statement;
  80   union  lang_statement_union **statement_ptr;
  81   int lineno;
  82   struct {
  83     FILE *file;
  84     char *name;
  85     unsigned int lineno;
  86   } state;
  87
  88
  89 }
  90
  91 %type <etree> exp  opt_exp
  92 %type <integer> fill_opt opt_block
  93 %type <name> memspec_opt
  94 %token <integer> INT
  95 %token <name> NAME
  96 %type  <integer> length
  97
  98 %right <token> PLUSEQ MINUSEQ MULTEQ DIVEQ  '=' LSHIFTEQ RSHIFTEQ   ANDEQ OREQ
  99 %right <token> '?' ':'
 100 %left <token> OROR
 101 %left <token>  ANDAND
 102 %left <token> '|'
 103 %left <token>  '^'
 104 %left  <token> '&'
 105 %left <token>  EQ NE
 106 %left  <token> '<' '>' LE GE
 107 %left  <token> LSHIFT RSHIFT
 108
 109 %left  <token> '+' '-'
 110 %left  <token> '*' '/' '%'
 111
 112 /*%token <token> '+' '-' '*' '/' '%'*/
 113 %right UNARY
 114 %left <token> '('
 115 %token <token> ALIGN_K BLOCK LONG SHORT BYTE
 116 %token SECTIONS
 117 %token '{' '}'
 118 %token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH
 119 %token SIZEOF_HEADERS
 120 %token MEMORY
 121 %token NAME DEFINED TARGET_K SEARCH_DIR MAP ENTRY
 122 %token OPTION_e OPTION_c OPTION_noinhibit_exec OPTION_s OPTION_S OPTION_sort_common
 123 %token OPTION_format  OPTION_F OPTION_u
 124 %token <integer> SIZEOF NEXT ADDR
 125 %token OPTION_d OPTION_dc OPTION_dp OPTION_x OPTION_X OPTION_defsym
 126 %token OPTION_v OPTION_M OPTION_t STARTUP HLL SYSLIB FLOAT NOFLOAT
 127 %token OPTION_n OPTION_r OPTION_o OPTION_b  OPTION_R
 128 %token <name> OPTION_l OPTION_L  OPTION_T OPTION_Aarch OPTION_Tfile  OPTION_Texp
 129 %token OPTION_Ur
 130 %token ORIGIN FILL OPTION_g
 131 %token LENGTH    CREATE_OBJECT_SYMBOLS INPUT OUTPUT
 132 %type <token> assign_op
 133
 134 %type <name>  filename
 135
 136 %{
 137 ld_config_type config;
 138 %}
 139
 140 %%
 141
 142
 143
 144 file:   command_line  { lang_final(); };
 145
 146
 147 filename:
 148   NAME;
 149
 150 command_line:
 151                 command_line command_line_option
 152         |
 153         ;
 154
 155 command_line_option:
 156                 '{'
 157                         { ldgram_in_script = true; }
 158                 ifile_list
 159                         { ldgram_in_script = false; }
 160                 '}'
 161         |       OPTION_v
 162                         {
 163                         ldversion();
 164                         option_v = true;
 165                         }
 166         |       OPTION_t {
 167                         trace_files = true;
 168                         }
 169         |       OPTION_M {
 170                         write_map = true;
 171                         }
 172         |       OPTION_n {
 173                         config.magic_demand_paged = false;
 174                         config.make_executable = false;
 175                         }
 176         |       OPTION_s {
 177                         strip_symbols = STRIP_ALL;
 178                         }
 179         |       OPTION_S {
 180                         strip_symbols = STRIP_DEBUGGER;
 181                         }
 182         |       OPTION_u NAME {
 183                         ldlang_add_undef($2);
 184                 }
 185
 186         |       OPTION_r {
 187                         config.relocateable_output = true;
 188                         config.build_constructors = false;
 189                         config.magic_demand_paged = false;
 190                         }
 191         |       OPTION_Ur {
 192                         config.relocateable_output = true;
 193                         config.build_constructors = true;
 194                         config.magic_demand_paged = false;
 195                       }
 196         |       OPTION_o filename
 197                         {
 198                         lang_add_output($2);
 199                         }
 200         |       OPTION_e NAME
 201                         { lang_add_entry($2);
 202                         }
 203         |       OPTION_X {
 204                         discard_locals = DISCARD_L;
 205                 }
 206         |       OPTION_x {
 207                         discard_locals = DISCARD_ALL;
 208                 }
 209
 210         |       OPTION_noinhibit_exec
 211                         {
 212                         force_make_executable = true;
 213                         }
 214         |      OPTION_sort_common {
 215         config.sort_common = true;
 216       }
 217         |      OPTION_d {
 218                           command_line.force_common_definition = true;
 219                         }
 220         |      OPTION_dc
 221                          {
 222                           command_line.force_common_definition = true;
 223                         }
 224         |       OPTION_g
 225                         {
 226                         /* Ignored */
 227                         }
 228         |       OPTION_dp
 229                          {
 230                           command_line.force_common_definition = true;
 231                         }
 232         |       OPTION_format NAME
 233                    {
 234                           lang_add_target($2);
 235                    }
 236         |       OPTION_Texp
 237                 {
 238                         hex_mode  =true;
 239                 }
 240                 INT
 241                 {
 242                         lang_section_start($1,exp_intop($3));
 243                         hex_mode = false;
 244                 }
 245
 246         |       OPTION_Aarch
 247                 {
 248                         ldfile_add_arch($1);
 249                 }
 250         |        OPTION_b NAME
 251                         {
 252                         lang_add_target($2);
 253                         }
 254         |       OPTION_L
 255                         {
 256                         ldfile_add_library_path($1);
 257                         }
 258         |       OPTION_F
 259                 {
 260                 /* Ignore */
 261                 }
 262         |       NAME
 263                 { lang_add_input_file($1,lang_input_file_is_file_enum,
 264                                  (char *)NULL); }
 265         |       OPTION_c filename script_file
 266                         { ldfile_open_command_file($2); }
 267         |       OPTION_Tfile
 268                         { ldfile_open_command_file($1); } script_file
 269
 270         |       OPTION_T filename
 271                         { ldfile_open_command_file($2); } script_file
 272
 273         |       OPTION_l
 274                         {
 275                           lang_add_input_file($1,
 276                                          lang_input_file_is_l_enum,
 277                                          (char *)NULL);
 278                         }
 279         |       OPTION_R filename
 280                         {
 281                         lang_add_input_file($2,
 282                                 lang_input_file_is_symbols_only_enum,
 283                                 (char *)NULL);
 284                         }
 285         |       OPTION_defsym
 286                         {
 287                         }
 288                 NAME     '='
 289                 exp
 290                         {
 291                         lang_add_assignment(exp_assop($4,$3,$5));
 292                         }
 293         | '-' NAME
 294                  { info("%P%F Unrecognised option -%s\n", $2);  }
 295
 296         ;
 297
 298
 299
 300
 301
 302
 303
 304
 305 script_file:
 306         { ldgram_in_script = true; }
 307        ifile_list '}'
 308         { ldgram_in_script = false; }
 309
 310         ;
 311
 312
 313 ifile_list:
 314        ifile_list ifile_p1
 315         |
 316         ;
 317
 318
 319
 320 ifile_p1:
 321                 memory
 322         |       sections
 323         |       startup
 324         |       high_level_library
 325         |       low_level_library
 326         |       floating_point_support
 327         |       statement_anywhere
 328         |       TARGET_K '(' NAME ')'
 329                 { lang_add_target($3); }
 330         |       SEARCH_DIR '(' filename ')'
 331                 { ldfile_add_library_path($3); }
 332         |       OUTPUT '(' filename ')'
 333                 { lang_add_output($3); }
 334         |       OUTPUT_FORMAT '(' NAME ')'
 335                   { lang_add_output_format($3); }
 336         |       OUTPUT_ARCH '(' NAME ')'
 337                   { ldfile_set_output_arch($3); }
 338         |       FORCE_COMMON_ALLOCATION
 339                 { command_line.force_common_definition = true ; }
 340         |       INPUT '(' input_list ')'
 341         |       MAP '(' filename ')'
 342                 { lang_add_map($3); }
 343         ;
 344
 345 input_list:
 346                 NAME
 347                 { lang_add_input_file($1,lang_input_file_is_file_enum,
 348                                  (char *)NULL); }
 349         |       input_list ',' NAME
 350                 { lang_add_input_file($3,lang_input_file_is_file_enum,
 351                                  (char *)NULL); }
 352         |       input_list   NAME
 353                 { lang_add_input_file($2, lang_input_file_is_file_enum,
 354                                  (char *)NULL); }
 355         ;
 356
 357 sections:
 358                 SECTIONS '{'sec_or_group_p1  '}'
 359         ;
 360
 361 sec_or_group_p1:
 362                 sec_or_group_p1 section
 363         |       sec_or_group_p1 statement_anywhere
 364         |
 365         ;
 366
 367 statement_anywhere:
 368                 ENTRY '(' NAME ')'
 369                 { lang_add_entry($3); }
 370         |       assignment end
 371         ;
 372
 373 file_NAME_list:
 374                 NAME
 375                         { lang_add_wild($1, current_file); }
 376         |       file_NAME_list opt_comma NAME
 377                         { lang_add_wild($3, current_file); }
 378         ;
 379
 380 input_section_spec:
 381                 NAME
 382                 {
 383                 lang_add_wild((char *)NULL, $1);
 384                 }
 385         |       '['
 386                         {
 387                         current_file = (char *)NULL;
 388                         }
 389                         file_NAME_list
 390                 ']'
 391         |       NAME
 392                         {
 393                         current_file  =$1;
 394                         }
 395                 '(' file_NAME_list ')'
 396         |       '*'
 397                         {
 398                         current_file = (char *)NULL;
 399                         }
 400                 '(' file_NAME_list ')'
 401         ;
 402
 403 statement:
 404                 statement assignment end
 405         |       statement CREATE_OBJECT_SYMBOLS
 406                 {
 407                   lang_add_attribute(lang_object_symbols_statement_enum); }
 408
 409         |       statement input_section_spec
 410         |       statement length '(' exp ')'
 411                         {
 412                         lang_add_data($2,$4);
 413                         }
 414
 415         |       statement FILL '(' exp ')'
 416                         {
 417                           lang_add_fill
 418                             (exp_get_value_int($4,
 419                                                0,
 420                                                "fill value",
 421                                                lang_first_phase_enum));
 422                         }
 423         |
 424         ;
 425
 426 length:
 427                 LONG
 428                         { $$ = $1; }
 429         |       SHORT
 430                         { $$ = $1; }
 431         |       BYTE
 432                         { $$ = $1; }
 433         ;
 434
 435 fill_opt:
 436           '=' exp
 437                 {
 438                   $$ =   exp_get_value_int($2,
 439                                            0,
 440                                            "fill value",
 441                                            lang_first_phase_enum);
 442                 }
 443         |       {  $$ = 0; }
 444         ;
 445
 446
 447
 448 assign_op:
 449                 PLUSEQ
 450                         { $$ = '+'; }
 451         |       MINUSEQ
 452                         { $$ = '-'; }
 453         |       MULTEQ
 454                         { $$ = '*'; }
 455         |       DIVEQ
 456                         { $$ = '/'; }
 457         |       LSHIFTEQ
 458                         { $$ = LSHIFT; }
 459         |       RSHIFTEQ
 460                         { $$ = RSHIFT; }
 461         |       ANDEQ
 462                         { $$ = '&'; }
 463         |       OREQ
 464                         { $$ = '|'; }
 465
 466         ;
 467
 468 end:    ';' | ','
 469         ;
 470
 471
 472 assignment:
 473                 NAME '=' exp
 474                 {
 475                   lang_add_assignment(exp_assop($2,$1,$3));
 476                 }
 477         |       NAME assign_op exp
 478                 {
 479                   lang_add_assignment(exp_assop('=',$1,exp_binop($2,exp_nameop(NAME,$1),$3)));
 480                 }
 481
 482         ;
 483
 484
 485 opt_comma:
 486                 ','     |       ;
 487
 488
 489 memory:
 490                 MEMORY '{' memory_spec memory_spec_list '}'
 491         ;
 492
 493 memory_spec_list:
 494                 memory_spec_list memory_spec
 495         |       memory_spec_list ',' memory_spec
 496         |
 497         ;
 498
 499
 500 memory_spec:
 501                 NAME
 502                         { region = lang_memory_region_lookup($1); }
 503                 attributes_opt  ':' origin_spec opt_comma length_spec
 504
 505                 {
 506
 507
 508                 }
 509         ;
 510 origin_spec:
 511         ORIGIN '=' exp
 512                 { region->current =
 513                  region->origin =
 514                  exp_get_vma($3, 0L,"origin", lang_first_phase_enum); }
 515         ;
 516 length_spec:
 517              LENGTH '=' exp
 518                {  region->length = exp_get_vma($3,
 519                                                ~((bfd_vma)0),
 520                                                "length",
 521                                                lang_first_phase_enum);
 522                 }
 523
 524
 525 attributes_opt:
 526                   '(' NAME ')'
 527                         {
 528                         lang_set_flags(&region->flags, $2);
 529                         }
 530         |
 531
 532         ;
 533
 534 startup:
 535         STARTUP '(' filename ')'
 536                 { lang_startup($3); }
 537         ;
 538
 539 high_level_library:
 540                 HLL '('  high_level_library_NAME_list ')'
 541         |       HLL '('  ')'
 542                         { ldemul_hll((char *)NULL); }
 543         ;
 544
 545 high_level_library_NAME_list:
 546                 high_level_library_NAME_list  opt_comma filename
 547                         { ldemul_hll($3); }
 548         |       filename
 549                         { ldemul_hll($1); }
 550
 551         ;
 552
 553 low_level_library:
 554         SYSLIB '(' low_level_library_NAME_list ')'
 555         ;
 556 low_level_library_NAME_list:
 557                 low_level_library_NAME_list opt_comma filename
 558                         { ldemul_syslib($3); }
 559         |
 560         ;
 561
 562 floating_point_support:
 563                 FLOAT
 564                         { lang_float(true); }
 565         |       NOFLOAT
 566                         { lang_float(false); }
 567         ;
 568
 569
 570
 571
 572 exp     :
 573                 '-' exp    %prec UNARY
 574                         { $$ = exp_unop('-', $2); }
 575         |       '(' exp ')'
 576                         { $$ = $2; }
 577         |       NEXT '(' exp ')' %prec UNARY
 578                         { $$ = exp_unop($1,$3); }
 579         |       '!' exp    %prec UNARY
 580                         { $$ = exp_unop('!', $2); }
 581         |       '+' exp    %prec UNARY
 582                         { $$ = $2; }
 583         |       '~' exp    %prec UNARY
 584                         { $$ = exp_unop('~', $2);}
 585
 586         |       exp '*' exp
 587                         { $$ = exp_binop('*', $1, $3); }
 588         |       exp '/' exp
 589                         { $$ = exp_binop('/', $1, $3); }
 590         |       exp '%' exp
 591                         { $$ = exp_binop('%', $1, $3); }
 592         |       exp '+' exp
 593                         { $$ = exp_binop('+', $1, $3); }
 594         |       exp '-' exp
 595                         { $$ = exp_binop('-' , $1, $3); }
 596         |       exp LSHIFT exp
 597                         { $$ = exp_binop(LSHIFT , $1, $3); }
 598         |       exp RSHIFT exp
 599                         { $$ = exp_binop(RSHIFT , $1, $3); }
 600         |       exp EQ exp
 601                         { $$ = exp_binop(EQ , $1, $3); }
 602         |       exp NE exp
 603                         { $$ = exp_binop(NE , $1, $3); }
 604         |       exp LE exp
 605                         { $$ = exp_binop(LE , $1, $3); }
 606         |       exp GE exp
 607                         { $$ = exp_binop(GE , $1, $3); }
 608         |       exp '<' exp
 609                         { $$ = exp_binop('<' , $1, $3); }
 610         |       exp '>' exp
 611                         { $$ = exp_binop('>' , $1, $3); }
 612         |       exp '&' exp
 613                         { $$ = exp_binop('&' , $1, $3); }
 614         |       exp '^' exp
 615                         { $$ = exp_binop('^' , $1, $3); }
 616         |       exp '|' exp
 617                         { $$ = exp_binop('|' , $1, $3); }
 618         |       exp '?' exp ':' exp
 619                         { $$ = exp_trinop('?' , $1, $3, $5); }
 620         |       exp ANDAND exp
 621                         { $$ = exp_binop(ANDAND , $1, $3); }
 622         |       exp OROR exp
 623                         { $$ = exp_binop(OROR , $1, $3); }
 624         |       DEFINED '(' NAME ')'
 625                         { $$ = exp_nameop(DEFINED, $3); }
 626         |       INT
 627                         { $$ = exp_intop($1); }
 628         |       SIZEOF_HEADERS
 629                         { $$ = exp_nameop(SIZEOF_HEADERS,0); }
 630
 631         |       SIZEOF  '('  NAME ')'
 632                         { $$ = exp_nameop($1,$3); }
 633         |       ADDR '(' NAME ')'
 634                         { $$ = exp_nameop($1,$3); }
 635         |       ALIGN_K '(' exp ')'
 636                         { $$ = exp_unop($1,$3); }
 637         |       NAME
 638                         { $$ = exp_nameop(NAME,$1); }
 639         ;
 640
 641
 642
 643
 644 section:        NAME opt_exp opt_block ':' opt_things'{'
 645                 {
 646                 lang_enter_output_section_statement($1,$2,$3);
 647                 }
 648                statement        '}'     fill_opt memspec_opt
 649                 {
 650                   lang_leave_output_section_statement($10, $11);
 651                 }
 652
 653         ;
 654
 655 opt_things:
 656         {
 657
 658         }
 659         ;
 660
 661
 662
 663
 664
 665 opt_exp:
 666                 exp
 667                         { $$ = $1; }
 668         |               { $$= (etree_type *)NULL; }
 669         ;
 670
 671 opt_block:
 672                 BLOCK '(' exp ')'
 673                 { $$ = exp_get_value_int($3,
 674                                          1L,
 675                                          "block",
 676                                          lang_first_phase_enum);
 677                 }
 678         |       { $$  = 1; }
 679         ;
 680
 681 memspec_opt:
 682                 '>' NAME
 683                 { $$ = $2; }
 684         |       { $$ = "*default*"; }
 685         ;
 686