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