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).
5 This file is part of GNU ld.
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.
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.
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. */
26 #define DONTDECLARE_MALLOC
42 extern unsigned int lineno;
43 extern boolean trace_files;
44 extern boolean write_map;
45 extern boolean option_longmap;
48 strip_symbols_type strip_symbols=STRIP_NONE;
49 discard_locals_type discard_locals=DISCARD_NONE;
52 lang_memory_region_type *region;
55 lang_memory_region_type *lang_memory_region_lookup();
56 lang_output_section_statement_type *lang_output_section_statement_lookup();
57 etree_type *lang_atin();
60 void lang_add_data(int type, union etree_union *exp);
61 void lang_enter_output_section_statement(char *output_section_statement_name, etree_type *address_exp, int flags, bfd_vma block_value,etree_type*,etree_type*, etree_type*);
66 void lang_enter_output_section_statement();
70 extern args_type command_line;
72 boolean ldgram_want_filename = true;
73 boolean had_script = false;
74 boolean force_make_executable = false;
76 boolean ldgram_in_script = false;
77 boolean ldgram_had_equals = false;
81 #define ERROR_NAME_MAX 20
82 static char *error_names[ERROR_NAME_MAX];
83 static int error_index;
84 #define PUSH_ERROR(x) if (error_index < ERROR_NAME_MAX) error_names[error_index] = x; error_index++;
85 #define POP_ERROR() error_index--;
92 union etree_union *etree;
94 struct lang_output_section_statement_struct *output_section_statement;
95 union lang_statement_union **statement_ptr;
106 %type <etree> exp opt_exp_with_type mustbe_exp opt_at
107 %type <integer> fill_opt
108 %type <name> memspec_opt
111 %type <integer> length
113 %right <token> PLUSEQ MINUSEQ MULTEQ DIVEQ '=' LSHIFTEQ RSHIFTEQ ANDEQ OREQ
114 %right <token> '?' ':'
121 %left <token> '<' '>' LE GE
122 %left <token> LSHIFT RSHIFT
124 %left <token> '+' '-'
125 %left <token> '*' '/' '%'
127 /*%token <token> '+' '-' '*' '/' '%'*/
131 %token <token> ALIGN_K BLOCK LONG SHORT BYTE
134 %token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH
135 %token SIZEOF_HEADERS
137 %token MEMORY DEFSYMEND
138 %token NOLOAD DSECT COPY INFO OVERLAY
139 %token NAME DEFINED TARGET_K SEARCH_DIR MAP ENTRY
140 %token OPTION_e OPTION_c OPTION_noinhibit_exec OPTION_s OPTION_S OPTION_sort_common
141 %token OPTION_EB OPTION_EL
142 %token OPTION_format OPTION_F OPTION_u OPTION_Bstatic OPTION_N
143 %token <integer> SIZEOF NEXT ADDR
144 %token OPTION_d OPTION_dc OPTION_dp OPTION_x OPTION_X OPTION_defsym
145 %token OPTION_v OPTION_V OPTION_M OPTION_t STARTUP HLL SYSLIB FLOAT NOFLOAT
147 %token OPTION_n OPTION_r OPTION_o OPTION_b OPTION_R OPTION_relax
148 %token <name> OPTION_l OPTION_L OPTION_T OPTION_Aarch OPTION_Tfile OPTION_Texp
149 %token <name> OPTION_y
151 %token ORIGIN FILL OPTION_g
152 %token LENGTH CREATE_OBJECT_SYMBOLS INPUT OUTPUT CONSTRUCTORS
153 %token OPTION_RETAIN_SYMBOLS_FILE ALIGNMOD AT
155 %type <token> assign_op
157 %type <name> filename
160 %token CHIP LIST SECT ABSOLUTE LOAD NEWLINE ENDWORD ORDER NAMEWORD
161 %token FORMAT PUBLIC DEFSYMEND BASE ALIAS TRUNCATE
164 ld_config_type config;
169 file: command_line { lang_final(); };
176 command_line command_line_option
198 config.map_filename = $2;
202 config.map_filename = "-";
205 config.magic_demand_paged = false;
208 config.text_read_only = false;
209 config.magic_demand_paged = false;
212 strip_symbols = STRIP_ALL;
215 strip_symbols = STRIP_DEBUGGER;
218 ldlang_add_undef($2);
222 config.relocateable_output = true;
223 config.build_constructors = false;
224 config.magic_demand_paged = false;
225 config.text_read_only = false;
228 config.relocateable_output = true;
229 config.build_constructors = true;
230 config.magic_demand_paged = false;
231 config.text_read_only = false;
238 { lang_add_entry($2);
241 discard_locals = DISCARD_L;
244 discard_locals = DISCARD_ALL;
247 | OPTION_noinhibit_exec
249 force_make_executable = true;
251 | OPTION_sort_common {
252 config.sort_common = true;
255 command_line.force_common_definition = true;
259 command_line.relax = true;
263 command_line.force_common_definition = true;
271 command_line.force_common_definition = true;
278 { ldlex_expression();
283 lang_section_start($1,exp_intop($3));
300 ldfile_add_library_path($1);
307 { lang_add_input_file($1,lang_input_file_is_file_enum,
310 { ldfile_open_command_file($2); } mri_script_file END { ldlex_command();}
313 { ldfile_open_command_file($1); } script_file
314 END { ldlex_command();}
317 { ldfile_open_command_file($2); } script_file
318 END { ldlex_command();}
322 lang_add_input_file($1,
323 lang_input_file_is_l_enum,
328 lang_add_input_file($2,
329 lang_input_file_is_symbols_only_enum,
333 | OPTION_defsym { ldlex_defsym(); }
334 NAME '=' exp DEFSYMEND { ldlex_popstate();
335 lang_add_assignment(exp_assop($4,$3,$5));
337 | OPTION_RETAIN_SYMBOLS_FILE filename
338 { lang_add_keepsyms_file ($2); }
341 /* FIXME: This is currently ignored. It means
342 ``produce a big-endian object file''. It could
343 be used to select an output format. */
347 /* FIXME: This is currently ignored. It means
348 ``produce a little-endian object file''. It could
349 be used to select an output format. */
352 { info("%P%F Unrecognized option -%s\n", $2); }
354 | '{' script_file '}'
358 /* SYNTAX WITHIN AN MRI SCRIPT FILE */
360 { ldlex_mri_script();
361 PUSH_ERROR("MRI style script");
370 mri_script_lines mri_script_command NEWLINE
378 einfo("%P%F: unrecognised keyword in MRI style script '%s'\n",$1);
382 config.map_filename = "-";
384 | ORDER ordernamelist
386 | PUBLIC NAME '=' exp
387 { mri_public($2, $4); }
388 | PUBLIC NAME ',' exp
389 { mri_public($2, $4); }
391 { mri_public($2, $3); }
395 { mri_output_section($2, $4);}
397 { mri_output_section($2, $3);}
399 { mri_output_section($2, $4);}
400 | ALIGN_K NAME '=' exp
401 { mri_align($2,$4); }
402 | ALIGNMOD NAME '=' exp
403 { mri_alignmod($2,$4); }
404 | ABSOLUTE mri_abs_name_list
405 | LOAD mri_load_name_list
408 | ALIAS NAME ',' NAME
409 { mri_alias($2,$4,0);}
411 { mri_alias($2,0,$4);}
415 { mri_truncate($2); }
420 ordernamelist ',' NAME { mri_order($3); }
421 | ordernamelist NAME { mri_order($2); }
428 | mri_load_name_list ',' NAME { mri_load($3); }
433 { mri_only_load($1); }
434 | mri_abs_name_list ',' NAME
435 { mri_only_load($3); }
462 | floating_point_support
465 | TARGET_K '(' NAME ')'
466 { lang_add_target($3); }
467 | SEARCH_DIR '(' filename ')'
468 { ldfile_add_library_path($3); }
469 | OUTPUT '(' filename ')'
470 { lang_add_output($3); }
471 | OUTPUT_FORMAT '(' NAME ')'
472 { lang_add_output_format($3); }
473 | OUTPUT_ARCH '(' NAME ')'
474 { ldfile_set_output_arch($3); }
475 | FORCE_COMMON_ALLOCATION
476 { command_line.force_common_definition = true ; }
477 | INPUT '(' input_list ')'
478 | MAP '(' filename ')'
479 { lang_add_map($3); }
481 { ldfile_open_command_file($2); } ifile_list END
486 { lang_add_input_file($1,lang_input_file_is_file_enum,
488 | input_list ',' NAME
489 { lang_add_input_file($3,lang_input_file_is_file_enum,
492 { lang_add_input_file($2,
493 lang_input_file_is_file_enum,
498 SECTIONS '{' sec_or_group_p1 '}'
502 sec_or_group_p1 section
503 | sec_or_group_p1 statement_anywhere
509 { lang_add_entry($3); }
515 { lang_add_wild($1, current_file); }
516 | file_NAME_list opt_comma NAME
517 { lang_add_wild($3, current_file); }
523 lang_add_wild((char *)NULL, $1);
527 current_file = (char *)NULL;
535 '(' file_NAME_list ')'
538 current_file = (char *)NULL;
540 '(' file_NAME_list ')'
545 | CREATE_OBJECT_SYMBOLS
547 lang_add_attribute(lang_object_symbols_statement_enum);
553 lang_add_attribute(lang_constructors_statement_enum);
558 lang_add_data($1,$3);
564 (exp_get_value_int($3,
567 lang_first_phase_enum));
572 statement_list statement
588 $$ = exp_get_value_int($2,
591 lang_first_phase_enum);
625 lang_add_assignment(exp_assop($2,$1,$3));
627 | NAME assign_op mustbe_exp
630 lang_add_assignment(exp_assop('=',$1,exp_binop($2,exp_nameop(NAME,$1),$3)));
641 MEMORY '{' memory_spec memory_spec_list '}'
645 memory_spec_list memory_spec
646 | memory_spec_list ',' memory_spec
652 { region = lang_memory_region_lookup($1); }
654 origin_spec opt_comma length_spec
657 ORIGIN '=' mustbe_exp
660 exp_get_vma($3, 0L,"origin", lang_first_phase_enum);
663 LENGTH '=' mustbe_exp
664 { region->length = exp_get_vma($3,
667 lang_first_phase_enum);
674 lang_set_flags(®ion->flags, $2);
681 STARTUP '(' filename ')'
682 { lang_startup($3); }
686 HLL '(' high_level_library_NAME_list ')'
688 { ldemul_hll((char *)NULL); }
691 high_level_library_NAME_list:
692 high_level_library_NAME_list opt_comma filename
700 SYSLIB '(' low_level_library_NAME_list ')'
701 ; low_level_library_NAME_list:
702 low_level_library_NAME_list opt_comma filename
703 { ldemul_syslib($3); }
707 floating_point_support:
709 { lang_float(true); }
711 { lang_float(false); }
715 mustbe_exp: { ldlex_expression(); }
717 { ldlex_popstate(); $$=$2;}
722 { $$ = exp_unop('-', $2); }
725 | NEXT '(' exp ')' %prec UNARY
726 { $$ = exp_unop($1,$3); }
727 | '!' exp %prec UNARY
728 { $$ = exp_unop('!', $2); }
729 | '+' exp %prec UNARY
731 | '~' exp %prec UNARY
732 { $$ = exp_unop('~', $2);}
735 { $$ = exp_binop('*', $1, $3); }
737 { $$ = exp_binop('/', $1, $3); }
739 { $$ = exp_binop('%', $1, $3); }
741 { $$ = exp_binop('+', $1, $3); }
743 { $$ = exp_binop('-' , $1, $3); }
745 { $$ = exp_binop(LSHIFT , $1, $3); }
747 { $$ = exp_binop(RSHIFT , $1, $3); }
749 { $$ = exp_binop(EQ , $1, $3); }
751 { $$ = exp_binop(NE , $1, $3); }
753 { $$ = exp_binop(LE , $1, $3); }
755 { $$ = exp_binop(GE , $1, $3); }
757 { $$ = exp_binop('<' , $1, $3); }
759 { $$ = exp_binop('>' , $1, $3); }
761 { $$ = exp_binop('&' , $1, $3); }
763 { $$ = exp_binop('^' , $1, $3); }
765 { $$ = exp_binop('|' , $1, $3); }
766 | exp '?' exp ':' exp
767 { $$ = exp_trinop('?' , $1, $3, $5); }
769 { $$ = exp_binop(ANDAND , $1, $3); }
771 { $$ = exp_binop(OROR , $1, $3); }
772 | DEFINED '(' NAME ')'
773 { $$ = exp_nameop(DEFINED, $3); }
775 { $$ = exp_intop($1); }
777 { $$ = exp_nameop(SIZEOF_HEADERS,0); }
779 | SIZEOF '(' NAME ')'
780 { $$ = exp_nameop(SIZEOF,$3); }
782 { $$ = exp_nameop(ADDR,$3); }
783 | ABSOLUTE '(' exp ')'
784 { $$ = exp_unop(ABSOLUTE, $3); }
785 | ALIGN_K '(' exp ')'
786 { $$ = exp_unop(ALIGN_K,$3); }
788 { $$ = exp_nameop(NAME,$1); }
793 AT '(' exp ')' { $$ = $3; }
797 section: NAME { ldlex_expression(); }
799 opt_at { ldlex_popstate(); }
802 lang_enter_output_section_statement($1,$3,typebits,0,0,0,$4);
805 '}' {ldlex_expression();} fill_opt memspec_opt
808 lang_leave_output_section_statement($11, $12);
815 NOLOAD { typebits = SEC_NEVER_LOAD; }
816 | DSECT { typebits = 0; }
817 | COPY { typebits = 0; }
818 | INFO { typebits = 0; }
819 | OVERLAY { typebits = 0; }
820 | { typebits = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; }
825 exp ':' { $$ = $1; typebits =0;}
826 | exp '(' type ')' ':' { $$ = $1; }
827 | ':' { $$= (etree_type *)NULL; typebits = 0; }
828 | '(' type ')' ':' { $$= (etree_type *)NULL; }
834 | { $$ = "*default*"; }
841 if (error_index> 0 && error_index < ERROR_NAME_MAX)
842 einfo("%P%F: %S syntax error in %s\n",error_names[error_index-1]);
844 einfo("%P%F: %S syntax error\n");