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();
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);
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;
89 union etree_union *etree;
91 struct lang_output_section_statement_struct *output_section_statement;
92 union lang_statement_union **statement_ptr;
103 %type <etree> exp opt_exp
104 %type <integer> fill_opt opt_block opt_type
105 %type <name> memspec_opt
108 %type <integer> length
110 %right <token> PLUSEQ MINUSEQ MULTEQ DIVEQ '=' LSHIFTEQ RSHIFTEQ ANDEQ OREQ
111 %right <token> '?' ':'
118 %left <token> '<' '>' LE GE
119 %left <token> LSHIFT RSHIFT
121 %left <token> '+' '-'
122 %left <token> '*' '/' '%'
124 /*%token <token> '+' '-' '*' '/' '%'*/
127 %token <token> ALIGN_K BLOCK LONG SHORT BYTE
130 %token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH
131 %token SIZEOF_HEADERS
133 %token NOLOAD DSECT COPY INFO OVERLAY
134 %token NAME DEFINED TARGET_K SEARCH_DIR MAP ENTRY
135 %token OPTION_e OPTION_c OPTION_noinhibit_exec OPTION_s OPTION_S OPTION_sort_common
136 %token OPTION_format OPTION_F OPTION_u OPTION_Bstatic OPTION_N
137 %token <integer> SIZEOF NEXT ADDR
138 %token OPTION_d OPTION_dc OPTION_dp OPTION_x OPTION_X OPTION_defsym
139 %token OPTION_v OPTION_V OPTION_M OPTION_t STARTUP HLL SYSLIB FLOAT NOFLOAT
141 %token OPTION_n OPTION_r OPTION_o OPTION_b OPTION_R OPTION_relax
142 %token <name> OPTION_l OPTION_L OPTION_T OPTION_Aarch OPTION_Tfile OPTION_Texp
144 %token ORIGIN FILL OPTION_g
145 %token LENGTH CREATE_OBJECT_SYMBOLS INPUT OUTPUT CONSTRUCTORS
146 %type <token> assign_op
148 %type <name> filename
151 ld_config_type config;
156 file: command_line { lang_final(); };
163 command_line command_line_option
169 { ldgram_in_script = true; }
171 { ldgram_in_script = false; }
190 config.map_filename = $2;
194 config.map_filename = "-";
198 config.magic_demand_paged = false;
201 config.text_read_only = false;
202 config.magic_demand_paged = false;
205 strip_symbols = STRIP_ALL;
208 strip_symbols = STRIP_DEBUGGER;
211 ldlang_add_undef($2);
215 config.relocateable_output = true;
216 config.build_constructors = false;
217 config.magic_demand_paged = false;
218 config.text_read_only = false;
221 config.relocateable_output = true;
222 config.build_constructors = true;
223 config.magic_demand_paged = false;
224 config.text_read_only = false;
231 { lang_add_entry($2);
234 discard_locals = DISCARD_L;
237 discard_locals = DISCARD_ALL;
240 | OPTION_noinhibit_exec
242 force_make_executable = true;
244 | OPTION_sort_common {
245 config.sort_common = true;
248 command_line.force_common_definition = true;
252 command_line.relax = true;
256 command_line.force_common_definition = true;
264 command_line.force_common_definition = true;
276 lang_section_start($1,exp_intop($3));
290 ldfile_add_library_path($1);
297 { lang_add_input_file($1,lang_input_file_is_file_enum,
300 { ldfile_open_command_file($2); } script_file
302 { ldfile_open_command_file($1); } script_file
305 { ldfile_open_command_file($2); } script_file
309 lang_add_input_file($1,
310 lang_input_file_is_l_enum,
315 lang_add_input_file($2,
316 lang_input_file_is_symbols_only_enum,
325 lang_add_assignment(exp_assop($4,$3,$5));
328 { info("%P%F Unrecognised option -%s\n", $2); }
340 { ldgram_in_script = true; }
342 { ldgram_in_script = false; }
360 | floating_point_support
363 | TARGET_K '(' NAME ')'
364 { lang_add_target($3); }
365 | SEARCH_DIR '(' filename ')'
366 { ldfile_add_library_path($3); }
367 | OUTPUT '(' filename ')'
368 { lang_add_output($3); }
369 | OUTPUT_FORMAT '(' NAME ')'
370 { lang_add_output_format($3); }
371 | OUTPUT_ARCH '(' NAME ')'
372 { ldfile_set_output_arch($3); }
373 | FORCE_COMMON_ALLOCATION
374 { command_line.force_common_definition = true ; }
375 | INPUT '(' input_list ')'
376 | MAP '(' filename ')'
377 { lang_add_map($3); }
382 { lang_add_input_file($1,lang_input_file_is_file_enum,
384 | input_list ',' NAME
385 { lang_add_input_file($3,lang_input_file_is_file_enum,
388 { lang_add_input_file($2, lang_input_file_is_file_enum,
393 SECTIONS '{'sec_or_group_p1 '}'
397 sec_or_group_p1 section
398 | sec_or_group_p1 statement_anywhere
405 { lang_add_entry($3); }
411 { lang_add_wild($1, current_file); }
412 | file_NAME_list opt_comma NAME
413 { lang_add_wild($3, current_file); }
419 lang_add_wild((char *)NULL, $1);
423 current_file = (char *)NULL;
431 '(' file_NAME_list ')'
434 current_file = (char *)NULL;
436 '(' file_NAME_list ')'
440 statement assignment end
443 | statement CREATE_OBJECT_SYMBOLS
445 lang_add_attribute(lang_object_symbols_statement_enum); }
446 | statement CONSTRUCTORS
448 lang_add_attribute(lang_constructors_statement_enum); }
450 | statement input_section_spec
451 | statement length '(' exp ')'
453 lang_add_data($2,$4);
456 | statement FILL '(' exp ')'
459 (exp_get_value_int($4,
462 lang_first_phase_enum));
479 $$ = exp_get_value_int($2,
482 lang_first_phase_enum);
516 lang_add_assignment(exp_assop($2,$1,$3));
520 lang_add_assignment(exp_assop('=',$1,exp_binop($2,exp_nameop(NAME,$1),$3)));
531 MEMORY '{' memory_spec memory_spec_list '}'
535 memory_spec_list memory_spec
536 | memory_spec_list ',' memory_spec
543 { region = lang_memory_region_lookup($1); }
544 attributes_opt ':' origin_spec opt_comma length_spec
555 exp_get_vma($3, 0L,"origin", lang_first_phase_enum); }
559 { region->length = exp_get_vma($3,
562 lang_first_phase_enum);
569 lang_set_flags(®ion->flags, $2);
576 STARTUP '(' filename ')'
577 { lang_startup($3); }
581 HLL '(' high_level_library_NAME_list ')'
583 { ldemul_hll((char *)NULL); }
586 high_level_library_NAME_list:
587 high_level_library_NAME_list opt_comma filename
595 SYSLIB '(' low_level_library_NAME_list ')'
597 low_level_library_NAME_list:
598 low_level_library_NAME_list opt_comma filename
599 { ldemul_syslib($3); }
603 floating_point_support:
605 { lang_float(true); }
607 { lang_float(false); }
615 { $$ = exp_unop('-', $2); }
618 | NEXT '(' exp ')' %prec UNARY
619 { $$ = exp_unop($1,$3); }
620 | '!' exp %prec UNARY
621 { $$ = exp_unop('!', $2); }
622 | '+' exp %prec UNARY
624 | '~' exp %prec UNARY
625 { $$ = exp_unop('~', $2);}
628 { $$ = exp_binop('*', $1, $3); }
630 { $$ = exp_binop('/', $1, $3); }
632 { $$ = exp_binop('%', $1, $3); }
634 { $$ = exp_binop('+', $1, $3); }
636 { $$ = exp_binop('-' , $1, $3); }
638 { $$ = exp_binop(LSHIFT , $1, $3); }
640 { $$ = exp_binop(RSHIFT , $1, $3); }
642 { $$ = exp_binop(EQ , $1, $3); }
644 { $$ = exp_binop(NE , $1, $3); }
646 { $$ = exp_binop(LE , $1, $3); }
648 { $$ = exp_binop(GE , $1, $3); }
650 { $$ = exp_binop('<' , $1, $3); }
652 { $$ = exp_binop('>' , $1, $3); }
654 { $$ = exp_binop('&' , $1, $3); }
656 { $$ = exp_binop('^' , $1, $3); }
658 { $$ = exp_binop('|' , $1, $3); }
659 | exp '?' exp ':' exp
660 { $$ = exp_trinop('?' , $1, $3, $5); }
662 { $$ = exp_binop(ANDAND , $1, $3); }
664 { $$ = exp_binop(OROR , $1, $3); }
665 | DEFINED '(' NAME ')'
666 { $$ = exp_nameop(DEFINED, $3); }
668 { $$ = exp_intop($1); }
670 { $$ = exp_nameop(SIZEOF_HEADERS,0); }
672 | SIZEOF '(' NAME ')'
673 { $$ = exp_nameop(SIZEOF,$3); }
675 { $$ = exp_nameop(ADDR,$3); }
676 | ALIGN_K '(' exp ')'
677 { $$ = exp_unop(ALIGN_K,$3); }
679 { $$ = exp_nameop(NAME,$1); }
685 section: NAME opt_exp opt_type opt_block ':' opt_things'{'
687 lang_enter_output_section_statement($1,$2,$3,$4);
689 statement '}' fill_opt memspec_opt
691 lang_leave_output_section_statement($11, $12);
697 '(' NOLOAD ')' { $$ = SEC_NO_FLAGS; }
698 | '(' DSECT ')' { $$ = 0; }
699 | '(' COPY ')' { $$ = 0; }
700 | '(' INFO ')' { $$ = 0; }
701 | '(' OVERLAY ')' { $$ = 0; }
702 | { $$ = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; }
711 | { $$= (etree_type *)NULL; }
716 { $$ = exp_get_value_int($3,
719 lang_first_phase_enum);
727 | { $$ = "*default*"; }