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;
46 extern int g_switch_value;
49 strip_symbols_type strip_symbols=STRIP_NONE;
50 discard_locals_type discard_locals=DISCARD_NONE;
53 lang_memory_region_type *region;
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();
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*);
67 void lang_enter_output_section_statement();
71 extern args_type command_line;
73 boolean ldgram_want_filename = true;
74 boolean had_script = false;
75 boolean force_make_executable = false;
77 boolean ldgram_in_script = false;
78 boolean ldgram_had_equals = false;
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--;
93 union etree_union *etree;
95 struct lang_output_section_statement_struct *output_section_statement;
96 union lang_statement_union **statement_ptr;
107 %type <etree> exp opt_exp_with_type mustbe_exp opt_at
108 %type <integer> fill_opt
109 %type <name> memspec_opt
112 %type <integer> length
114 %right <token> PLUSEQ MINUSEQ MULTEQ DIVEQ '=' LSHIFTEQ RSHIFTEQ ANDEQ OREQ
115 %right <token> '?' ':'
122 %left <token> '<' '>' LE GE
123 %left <token> LSHIFT RSHIFT
125 %left <token> '+' '-'
126 %left <token> '*' '/' '%'
128 /*%token <token> '+' '-' '*' '/' '%'*/
132 %token <token> ALIGN_K BLOCK LONG SHORT BYTE
135 %token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH
136 %token SIZEOF_HEADERS
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 OPTION_help
143 %token OPTION_format OPTION_oformat 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
148 %token OPTION_n OPTION_r OPTION_o OPTION_b OPTION_R OPTION_relax OPTION_version
149 %token <name> OPTION_l OPTION_L OPTION_T OPTION_Aarch OPTION_Tfile OPTION_Texp
150 %token <name> OPTION_y
152 %token ORIGIN FILL OPTION_g
153 %token LENGTH CREATE_OBJECT_SYMBOLS INPUT OUTPUT CONSTRUCTORS
154 %token OPTION_RETAIN_SYMBOLS_FILE ALIGNMOD AT
156 %type <token> assign_op
158 %type <name> filename
161 %token CHIP LIST SECT ABSOLUTE LOAD NEWLINE ENDWORD ORDER NAMEWORD
162 %token FORMAT PUBLIC DEFSYMEND BASE ALIAS TRUNCATE
165 ld_config_type config;
170 file: command_line { lang_final(); };
177 command_line command_line_option
208 config.map_filename = $2;
220 config.map_filename = "-";
223 config.magic_demand_paged = false;
226 config.text_read_only = false;
227 config.magic_demand_paged = false;
230 strip_symbols = STRIP_ALL;
233 strip_symbols = STRIP_DEBUGGER;
236 ldlang_add_undef($2);
240 config.relocateable_output = true;
241 config.build_constructors = false;
242 config.magic_demand_paged = false;
243 config.text_read_only = false;
246 config.relocateable_output = true;
247 config.build_constructors = true;
248 config.magic_demand_paged = false;
249 config.text_read_only = false;
256 { lang_add_entry($2);
259 discard_locals = DISCARD_L;
262 discard_locals = DISCARD_ALL;
265 | OPTION_noinhibit_exec
267 force_make_executable = true;
271 config.sort_common = true;
274 command_line.force_common_definition = true;
278 command_line.relax = true;
282 command_line.force_common_definition = true;
290 command_line.force_common_definition = true;
296 | OPTION_oformat NAME
298 lang_add_output_format($2, 0);
301 { ldlex_expression();
306 lang_section_start($1,exp_intop($3));
323 ldfile_add_library_path($1);
330 {ldfile_open_command_file($2); }
331 mri_script_file END { ldlex_command();}
334 { ldfile_open_command_file($1); } script_file
335 END { ldlex_command();}
338 { ldfile_open_command_file($2); } script_file
339 END { ldlex_command();}
343 lang_add_input_file($1,
344 lang_input_file_is_l_enum,
349 lang_add_input_file($2,
350 lang_input_file_is_symbols_only_enum,
354 | OPTION_defsym { ldlex_defsym(); }
355 NAME '=' exp DEFSYMEND { ldlex_popstate();
356 lang_add_assignment(exp_assop($4,$3,$5));
358 | OPTION_RETAIN_SYMBOLS_FILE filename
359 { lang_add_keepsyms_file ($2); }
362 /* FIXME: This is currently ignored. It means
363 ``produce a big-endian object file''. It could
364 be used to select an output format. */
368 /* FIXME: This is currently ignored. It means
369 ``produce a little-endian object file''. It could
370 be used to select an output format. */
374 g_switch_value = atoi ($2);
378 g_switch_value = yylval.integer;
383 einfo("%P%F: illegal option -- %s\n", $1);
385 lang_add_input_file($1,lang_input_file_is_file_enum,
391 /* SYNTAX WITHIN AN MRI SCRIPT FILE */
393 { ldlex_mri_script();
394 PUSH_ERROR("MRI style script");
403 mri_script_lines mri_script_command NEWLINE
411 einfo("%P%F: unrecognised keyword in MRI style script '%s'\n",$1);
415 config.map_filename = "-";
417 | ORDER ordernamelist
419 | PUBLIC NAME '=' exp
420 { mri_public($2, $4); }
421 | PUBLIC NAME ',' exp
422 { mri_public($2, $4); }
424 { mri_public($2, $3); }
428 { mri_output_section($2, $4);}
430 { mri_output_section($2, $3);}
432 { mri_output_section($2, $4);}
433 | ALIGN_K NAME '=' exp
434 { mri_align($2,$4); }
435 | ALIGNMOD NAME '=' exp
436 { mri_alignmod($2,$4); }
437 | ABSOLUTE mri_abs_name_list
438 | LOAD mri_load_name_list
441 | ALIAS NAME ',' NAME
442 { mri_alias($2,$4,0);}
444 { mri_alias($2,0,$4);}
448 { mri_truncate($2); }
453 ordernamelist ',' NAME { mri_order($3); }
454 | ordernamelist NAME { mri_order($2); }
461 | mri_load_name_list ',' NAME { mri_load($3); }
466 { mri_only_load($1); }
467 | mri_abs_name_list ',' NAME
468 { mri_only_load($3); }
495 | floating_point_support
498 | TARGET_K '(' NAME ')'
499 { lang_add_target($3); }
500 | SEARCH_DIR '(' filename ')'
501 { ldfile_add_library_path($3); }
502 | OUTPUT '(' filename ')'
503 { lang_add_output($3); }
504 | OUTPUT_FORMAT '(' NAME ')'
505 { lang_add_output_format($3, 1); }
506 | OUTPUT_ARCH '(' NAME ')'
507 { ldfile_set_output_arch($3); }
508 | FORCE_COMMON_ALLOCATION
509 { command_line.force_common_definition = true ; }
510 | INPUT '(' input_list ')'
511 | MAP '(' filename ')'
512 { lang_add_map($3); }
514 { ldfile_open_command_file($2); } ifile_list END
519 { lang_add_input_file($1,lang_input_file_is_file_enum,
521 | input_list ',' NAME
522 { lang_add_input_file($3,lang_input_file_is_file_enum,
525 { lang_add_input_file($2,
526 lang_input_file_is_file_enum,
531 SECTIONS '{' sec_or_group_p1 '}'
535 sec_or_group_p1 section
536 | sec_or_group_p1 statement_anywhere
542 { lang_add_entry($3); }
548 { lang_add_wild($1, current_file); }
549 | file_NAME_list opt_comma NAME
550 { lang_add_wild($3, current_file); }
556 lang_add_wild((char *)NULL, $1);
560 current_file = (char *)NULL;
568 '(' file_NAME_list ')'
571 current_file = (char *)NULL;
573 '(' file_NAME_list ')'
578 | CREATE_OBJECT_SYMBOLS
580 lang_add_attribute(lang_object_symbols_statement_enum);
586 lang_add_attribute(lang_constructors_statement_enum);
591 lang_add_data($1,$3);
597 (exp_get_value_int($3,
600 lang_first_phase_enum));
605 statement_list statement
626 $$ = exp_get_value_int($2,
629 lang_first_phase_enum);
663 lang_add_assignment(exp_assop($2,$1,$3));
665 | NAME assign_op mustbe_exp
668 lang_add_assignment(exp_assop('=',$1,exp_binop($2,exp_nameop(NAME,$1),$3)));
679 MEMORY '{' memory_spec memory_spec_list '}'
683 memory_spec_list memory_spec
684 | memory_spec_list ',' memory_spec
690 { region = lang_memory_region_lookup($1); }
692 origin_spec opt_comma length_spec
695 ORIGIN '=' mustbe_exp
698 exp_get_vma($3, 0L,"origin", lang_first_phase_enum);
701 LENGTH '=' mustbe_exp
702 { region->length = exp_get_vma($3,
705 lang_first_phase_enum);
712 lang_set_flags(®ion->flags, $2);
719 STARTUP '(' filename ')'
720 { lang_startup($3); }
724 HLL '(' high_level_library_NAME_list ')'
726 { ldemul_hll((char *)NULL); }
729 high_level_library_NAME_list:
730 high_level_library_NAME_list opt_comma filename
738 SYSLIB '(' low_level_library_NAME_list ')'
739 ; low_level_library_NAME_list:
740 low_level_library_NAME_list opt_comma filename
741 { ldemul_syslib($3); }
745 floating_point_support:
747 { lang_float(true); }
749 { lang_float(false); }
753 mustbe_exp: { ldlex_expression(); }
755 { ldlex_popstate(); $$=$2;}
760 { $$ = exp_unop('-', $2); }
763 | NEXT '(' exp ')' %prec UNARY
764 { $$ = exp_unop($1,$3); }
765 | '!' exp %prec UNARY
766 { $$ = exp_unop('!', $2); }
767 | '+' exp %prec UNARY
769 | '~' exp %prec UNARY
770 { $$ = exp_unop('~', $2);}
773 { $$ = exp_binop('*', $1, $3); }
775 { $$ = exp_binop('/', $1, $3); }
777 { $$ = exp_binop('%', $1, $3); }
779 { $$ = exp_binop('+', $1, $3); }
781 { $$ = exp_binop('-' , $1, $3); }
783 { $$ = exp_binop(LSHIFT , $1, $3); }
785 { $$ = exp_binop(RSHIFT , $1, $3); }
787 { $$ = exp_binop(EQ , $1, $3); }
789 { $$ = exp_binop(NE , $1, $3); }
791 { $$ = exp_binop(LE , $1, $3); }
793 { $$ = exp_binop(GE , $1, $3); }
795 { $$ = exp_binop('<' , $1, $3); }
797 { $$ = exp_binop('>' , $1, $3); }
799 { $$ = exp_binop('&' , $1, $3); }
801 { $$ = exp_binop('^' , $1, $3); }
803 { $$ = exp_binop('|' , $1, $3); }
804 | exp '?' exp ':' exp
805 { $$ = exp_trinop('?' , $1, $3, $5); }
807 { $$ = exp_binop(ANDAND , $1, $3); }
809 { $$ = exp_binop(OROR , $1, $3); }
810 | DEFINED '(' NAME ')'
811 { $$ = exp_nameop(DEFINED, $3); }
813 { $$ = exp_intop($1); }
815 { $$ = exp_nameop(SIZEOF_HEADERS,0); }
817 | SIZEOF '(' NAME ')'
818 { $$ = exp_nameop(SIZEOF,$3); }
820 { $$ = exp_nameop(ADDR,$3); }
821 | ABSOLUTE '(' exp ')'
822 { $$ = exp_unop(ABSOLUTE, $3); }
823 | ALIGN_K '(' exp ')'
824 { $$ = exp_unop(ALIGN_K,$3); }
826 { $$ = exp_nameop(NAME,$1); }
831 AT '(' exp ')' { $$ = $3; }
835 section: NAME { ldlex_expression(); }
837 opt_at { ldlex_popstate(); }
840 lang_enter_output_section_statement($1,$3,typebits,0,0,0,$4);
843 '}' {ldlex_expression();} fill_opt memspec_opt
846 lang_leave_output_section_statement($11, $12);
853 NOLOAD { typebits = SEC_NEVER_LOAD; }
854 | DSECT { typebits = 0; }
855 | COPY { typebits = 0; }
856 | INFO { typebits = 0; }
857 | OVERLAY { typebits = 0; }
858 | { typebits = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; }
863 exp ':' { $$ = $1; typebits =0;}
864 | exp '(' type ')' ':' { $$ = $1; }
865 | ':' { $$= (etree_type *)NULL; typebits = 0; }
866 | '(' type ')' ':' { $$= (etree_type *)NULL; }
872 | { $$ = "*default*"; }
879 if (error_index> 0 && error_index < ERROR_NAME_MAX)
880 einfo("%P%F: %S syntax error in %s\n",error_names[error_index-1]);
882 einfo("%P%F: %S syntax error\n");