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732 lines
14 KiB
Plaintext
732 lines
14 KiB
Plaintext
/* A YACC grammer to parse a superset of the AT&T linker scripting languaue.
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Copyright (C) 1991 Free Software Foundation, Inc.
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Written by Steve Chamberlain of Cygnus Support (steve@cygnus.com).
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This file is part of GNU ld.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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%{
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/*
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*/
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#define DONTDECLARE_MALLOC
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#include "bfd.h"
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#include "sysdep.h"
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#include "ld.h"
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#include "ldexp.h"
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#include "ldver.h"
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#include "ldlang.h"
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#include "ldemul.h"
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#include "ldfile.h"
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#include "ldmisc.h"
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#define YYDEBUG 1
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boolean option_v;
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extern unsigned int lineno;
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extern boolean trace_files;
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extern boolean write_map;
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extern boolean option_longmap;
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boolean hex_mode;
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strip_symbols_type strip_symbols=STRIP_NONE;
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discard_locals_type discard_locals=DISCARD_NONE;
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lang_memory_region_type *region;
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lang_memory_region_type *lang_memory_region_lookup();
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lang_output_section_statement_type *lang_output_section_statement_lookup();
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#ifdef __STDC__
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void lang_add_data(int type, union etree_union *exp);
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void lang_enter_output_section_statement(char *output_section_statement_name, etree_type *address_exp, int flags, bfd_vma block_value);
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#else
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void lang_add_data();
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void lang_enter_output_section_statement();
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#endif /* __STDC__ */
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extern args_type command_line;
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char *current_file;
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boolean ldgram_want_filename = true;
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boolean had_script = false;
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boolean force_make_executable = false;
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boolean ldgram_in_script = false;
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boolean ldgram_had_equals = false;
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/* LOCALS */
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%}
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%union {
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bfd_vma integer;
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int voidval;
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char *name;
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int token;
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union etree_union *etree;
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struct sec *section;
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struct lang_output_section_statement_struct *output_section_statement;
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union lang_statement_union **statement_ptr;
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int lineno;
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struct {
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FILE *file;
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char *name;
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unsigned int lineno;
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} state;
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}
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%type <etree> exp opt_exp mustbe_exp
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%type <integer> fill_opt opt_block opt_type
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%type <name> memspec_opt
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%token <integer> INT
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%token <name> NAME
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%type <integer> length
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%right <token> PLUSEQ MINUSEQ MULTEQ DIVEQ '=' LSHIFTEQ RSHIFTEQ ANDEQ OREQ
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%right <token> '?' ':'
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%left <token> OROR
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%left <token> ANDAND
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%left <token> '|'
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%left <token> '^'
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%left <token> '&'
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%left <token> EQ NE
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%left <token> '<' '>' LE GE
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%left <token> LSHIFT RSHIFT
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%left <token> '+' '-'
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%left <token> '*' '/' '%'
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/*%token <token> '+' '-' '*' '/' '%'*/
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%right UNARY
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%token END
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%left <token> '('
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%token <token> ALIGN_K BLOCK LONG SHORT BYTE
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%token SECTIONS
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%token '{' '}'
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%token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH
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%token SIZEOF_HEADERS
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%token MEMORY
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%token NOLOAD DSECT COPY INFO OVERLAY
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%token NAME DEFINED TARGET_K SEARCH_DIR MAP ENTRY
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%token OPTION_e OPTION_c OPTION_noinhibit_exec OPTION_s OPTION_S OPTION_sort_common
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%token OPTION_format OPTION_F OPTION_u OPTION_Bstatic OPTION_N
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%token <integer> SIZEOF NEXT ADDR
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%token OPTION_d OPTION_dc OPTION_dp OPTION_x OPTION_X OPTION_defsym
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%token OPTION_v OPTION_V OPTION_M OPTION_t STARTUP HLL SYSLIB FLOAT NOFLOAT
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%token OPTION_Map
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%token OPTION_n OPTION_r OPTION_o OPTION_b OPTION_R OPTION_relax
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%token <name> OPTION_l OPTION_L OPTION_T OPTION_Aarch OPTION_Tfile OPTION_Texp
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%token OPTION_Ur
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%token ORIGIN FILL OPTION_g
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%token LENGTH CREATE_OBJECT_SYMBOLS INPUT OUTPUT CONSTRUCTORS
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%type <token> assign_op
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%type <name> filename
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%{
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ld_config_type config;
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%}
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%%
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file: command_line { lang_final(); };
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filename: NAME;
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command_line:
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command_line command_line_option
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;
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command_line_option:
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OPTION_Bstatic { }
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| OPTION_v
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{
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ldversion(0);
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option_v = true;
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}
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| OPTION_V
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{
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ldversion(1);
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option_v = true;
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}
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| OPTION_t {
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trace_files = true;
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}
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| OPTION_Map NAME
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{
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write_map = true;
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config.map_filename = $2;
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}
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| OPTION_M {
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config.map_filename = "-";
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}
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| OPTION_n {
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config.magic_demand_paged = false;
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}
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| OPTION_N {
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config.text_read_only = false;
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config.magic_demand_paged = false;
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}
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| OPTION_s {
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strip_symbols = STRIP_ALL;
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}
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| OPTION_S {
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strip_symbols = STRIP_DEBUGGER;
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}
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| OPTION_u NAME {
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ldlang_add_undef($2);
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}
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| OPTION_r {
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config.relocateable_output = true;
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config.build_constructors = false;
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config.magic_demand_paged = false;
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config.text_read_only = false;
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}
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| OPTION_Ur {
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config.relocateable_output = true;
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config.build_constructors = true;
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config.magic_demand_paged = false;
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config.text_read_only = false;
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}
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| OPTION_o filename
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{
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lang_add_output($2);
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}
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| OPTION_e NAME
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{ lang_add_entry($2);
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}
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| OPTION_X {
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discard_locals = DISCARD_L;
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}
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| OPTION_x {
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discard_locals = DISCARD_ALL;
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}
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| OPTION_noinhibit_exec
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{
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force_make_executable = true;
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}
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| OPTION_sort_common {
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config.sort_common = true;
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}
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| OPTION_d {
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command_line.force_common_definition = true;
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}
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| OPTION_relax {
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command_line.relax = true;
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}
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| OPTION_dc
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{
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command_line.force_common_definition = true;
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}
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| OPTION_g
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{
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/* Ignored */
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}
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| OPTION_dp
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{
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command_line.force_common_definition = true;
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}
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| OPTION_format NAME
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{
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lang_add_target($2);
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}
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| OPTION_Texp
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{
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hex_mode = 16;
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}
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INT
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{
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lang_section_start($1,exp_intop($3));
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hex_mode = 0;
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}
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| OPTION_Aarch
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{
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ldfile_add_arch($1);
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}
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| OPTION_b NAME
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{
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lang_add_target($2);
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}
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| OPTION_L
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{
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ldfile_add_library_path($1);
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}
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| OPTION_F
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{
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/* Ignore */
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}
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| NAME
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{ lang_add_input_file($1,lang_input_file_is_file_enum,
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(char *)NULL); }
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| OPTION_c filename
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{ ldfile_open_command_file($2); } script_file END { ldlex_command()};
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| OPTION_Tfile
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{ ldfile_open_command_file($1); } script_file
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END { ldlex_command();}
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| OPTION_T filename
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{ ldfile_open_command_file($2); } script_file
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END { ldlex_command();}
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| OPTION_l
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{
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lang_add_input_file($1,
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lang_input_file_is_l_enum,
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(char *)NULL);
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}
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| OPTION_R filename
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{
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lang_add_input_file($2,
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lang_input_file_is_symbols_only_enum,
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(char *)NULL);
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}
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| OPTION_defsym { ldlex_expression();
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}
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NAME '=' mustbe_exp { ldlex_popstate();
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lang_add_assignment(exp_assop($4,$3,$5));
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}
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| '-' NAME
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{ info("%P%F Unrecognised option -%s\n", $2); }
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| '{' script_file '}'
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;
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script_file:
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{
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ldlex_both();
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}
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ifile_list
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{
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ldlex_popstate();
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}
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;
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ifile_list:
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ifile_list ifile_p1
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;
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ifile_p1:
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memory
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| sections
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| startup
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| high_level_library
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| low_level_library
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| floating_point_support
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| statement_anywhere
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| ';'
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| TARGET_K '(' NAME ')'
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{ lang_add_target($3); }
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| SEARCH_DIR '(' filename ')'
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{ ldfile_add_library_path($3); }
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| OUTPUT '(' filename ')'
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{ lang_add_output($3); }
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| OUTPUT_FORMAT '(' NAME ')'
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{ lang_add_output_format($3); }
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| OUTPUT_ARCH '(' NAME ')'
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{ ldfile_set_output_arch($3); }
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| FORCE_COMMON_ALLOCATION
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{ command_line.force_common_definition = true ; }
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| INPUT '(' input_list ')'
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| MAP '(' filename ')'
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{ lang_add_map($3); }
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;
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input_list:
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NAME
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{ lang_add_input_file($1,lang_input_file_is_file_enum,
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(char *)NULL); }
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| input_list ',' NAME
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{ lang_add_input_file($3,lang_input_file_is_file_enum,
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(char *)NULL); }
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| input_list NAME
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{ lang_add_input_file($2, lang_input_file_is_file_enum,
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(char *)NULL); }
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;
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sections:
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SECTIONS '{' sec_or_group_p1 '}'
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;
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sec_or_group_p1:
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sec_or_group_p1 section
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| sec_or_group_p1 statement_anywhere
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;
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statement_anywhere:
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ENTRY '(' NAME ')'
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{ lang_add_entry($3); }
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| assignment end
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;
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file_NAME_list:
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NAME
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{ lang_add_wild($1, current_file); }
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| file_NAME_list opt_comma NAME
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{ lang_add_wild($3, current_file); }
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;
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input_section_spec:
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NAME
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{
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lang_add_wild((char *)NULL, $1);
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}
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| '['
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{
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current_file = (char *)NULL;
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}
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file_NAME_list
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']'
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| NAME
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{
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current_file =$1;
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}
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'(' file_NAME_list ')'
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| '*'
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{
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current_file = (char *)NULL;
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}
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'(' file_NAME_list ')'
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;
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statement:
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statement assignment end
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| statement CREATE_OBJECT_SYMBOLS
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{
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lang_add_attribute(lang_object_symbols_statement_enum); }
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| statement ';'
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| statement CONSTRUCTORS
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{
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lang_add_attribute(lang_constructors_statement_enum); }
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| statement input_section_spec
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| statement length '(' exp ')'
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{
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lang_add_data($2,$4);
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}
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| statement FILL '(' exp ')'
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{
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lang_add_fill
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(exp_get_value_int($4,
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0,
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"fill value",
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lang_first_phase_enum));
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}
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;
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length:
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LONG
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{ $$ = $1; }
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| SHORT
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{ $$ = $1; }
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| BYTE
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{ $$ = $1; }
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;
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fill_opt:
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'=' mustbe_exp
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{
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$$ = exp_get_value_int($2,
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0,
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"fill value",
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lang_first_phase_enum);
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}
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| { $$ = 0; }
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;
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assign_op:
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PLUSEQ
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{ $$ = '+'; }
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| MINUSEQ
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{ $$ = '-'; }
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| MULTEQ
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{ $$ = '*'; }
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| DIVEQ
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{ $$ = '/'; }
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| LSHIFTEQ
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{ $$ = LSHIFT; }
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| RSHIFTEQ
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{ $$ = RSHIFT; }
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| ANDEQ
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{ $$ = '&'; }
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| OREQ
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{ $$ = '|'; }
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;
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end: ';' | ','
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;
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assignment:
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NAME '=' mustbe_exp
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{
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lang_add_assignment(exp_assop($2,$1,$3));
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}
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| NAME assign_op mustbe_exp
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{
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lang_add_assignment(exp_assop('=',$1,exp_binop($2,exp_nameop(NAME,$1),$3)));
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}
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;
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opt_comma:
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',' | ;
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memory:
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MEMORY '{' memory_spec memory_spec_list '}'
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;
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memory_spec_list:
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memory_spec_list memory_spec
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| memory_spec_list ',' memory_spec
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;
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memory_spec:
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NAME
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{ region = lang_memory_region_lookup($1); }
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attributes_opt ':'
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origin_spec opt_comma length_spec
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;
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origin_spec:
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ORIGIN '=' mustbe_exp
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{ region->current =
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region->origin =
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exp_get_vma($3, 0L,"origin", lang_first_phase_enum); }
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;
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length_spec:
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LENGTH '=' mustbe_exp
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{ region->length = exp_get_vma($3,
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~((bfd_vma)0),
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"length",
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lang_first_phase_enum);
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}
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attributes_opt:
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'(' NAME ')'
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{
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lang_set_flags(®ion->flags, $2);
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}
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;
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startup:
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STARTUP '(' filename ')'
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{ lang_startup($3); }
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;
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high_level_library:
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HLL '(' high_level_library_NAME_list ')'
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| HLL '(' ')'
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{ ldemul_hll((char *)NULL); }
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;
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high_level_library_NAME_list:
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high_level_library_NAME_list opt_comma filename
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{ ldemul_hll($3); }
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| filename
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{ ldemul_hll($1); }
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;
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low_level_library:
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SYSLIB '(' low_level_library_NAME_list ')'
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;
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low_level_library_NAME_list:
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low_level_library_NAME_list opt_comma filename
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{ ldemul_syslib($3); }
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;
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floating_point_support:
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FLOAT
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{ lang_float(true); }
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| NOFLOAT
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{ lang_float(false); }
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;
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mustbe_exp: { ldlex_expression(); }
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exp
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{ ldlex_popstate(); $$=$2;}
|
|
;
|
|
|
|
exp :
|
|
'-' exp %prec UNARY
|
|
{ $$ = exp_unop('-', $2); }
|
|
| '(' exp ')'
|
|
{ $$ = $2; }
|
|
| NEXT '(' exp ')' %prec UNARY
|
|
{ $$ = exp_unop($1,$3); }
|
|
| '!' exp %prec UNARY
|
|
{ $$ = exp_unop('!', $2); }
|
|
| '+' exp %prec UNARY
|
|
{ $$ = $2; }
|
|
| '~' exp %prec UNARY
|
|
{ $$ = exp_unop('~', $2);}
|
|
|
|
| exp '*' exp
|
|
{ $$ = exp_binop('*', $1, $3); }
|
|
| exp '/' exp
|
|
{ $$ = exp_binop('/', $1, $3); }
|
|
| exp '%' exp
|
|
{ $$ = exp_binop('%', $1, $3); }
|
|
| exp '+' exp
|
|
{ $$ = exp_binop('+', $1, $3); }
|
|
| exp '-' exp
|
|
{ $$ = exp_binop('-' , $1, $3); }
|
|
| exp LSHIFT exp
|
|
{ $$ = exp_binop(LSHIFT , $1, $3); }
|
|
| exp RSHIFT exp
|
|
{ $$ = exp_binop(RSHIFT , $1, $3); }
|
|
| exp EQ exp
|
|
{ $$ = exp_binop(EQ , $1, $3); }
|
|
| exp NE exp
|
|
{ $$ = exp_binop(NE , $1, $3); }
|
|
| exp LE exp
|
|
{ $$ = exp_binop(LE , $1, $3); }
|
|
| exp GE exp
|
|
{ $$ = exp_binop(GE , $1, $3); }
|
|
| exp '<' exp
|
|
{ $$ = exp_binop('<' , $1, $3); }
|
|
| exp '>' exp
|
|
{ $$ = exp_binop('>' , $1, $3); }
|
|
| exp '&' exp
|
|
{ $$ = exp_binop('&' , $1, $3); }
|
|
| exp '^' exp
|
|
{ $$ = exp_binop('^' , $1, $3); }
|
|
| exp '|' exp
|
|
{ $$ = exp_binop('|' , $1, $3); }
|
|
| exp '?' exp ':' exp
|
|
{ $$ = exp_trinop('?' , $1, $3, $5); }
|
|
| exp ANDAND exp
|
|
{ $$ = exp_binop(ANDAND , $1, $3); }
|
|
| exp OROR exp
|
|
{ $$ = exp_binop(OROR , $1, $3); }
|
|
| DEFINED '(' NAME ')'
|
|
{ $$ = exp_nameop(DEFINED, $3); }
|
|
| INT
|
|
{ $$ = exp_intop($1); }
|
|
| SIZEOF_HEADERS
|
|
{ $$ = exp_nameop(SIZEOF_HEADERS,0); }
|
|
|
|
| SIZEOF '(' NAME ')'
|
|
{ $$ = exp_nameop(SIZEOF,$3); }
|
|
| ADDR '(' NAME ')'
|
|
{ $$ = exp_nameop(ADDR,$3); }
|
|
| ALIGN_K '(' exp ')'
|
|
{ $$ = exp_unop(ALIGN_K,$3); }
|
|
| NAME
|
|
{ $$ = exp_nameop(NAME,$1); }
|
|
;
|
|
|
|
|
|
|
|
|
|
section: NAME { ldlex_expression(); }
|
|
opt_exp { ldlex_popstate(); }
|
|
opt_type opt_block ':' opt_things'{'
|
|
{
|
|
lang_enter_output_section_statement($1,$3,$5,$6);
|
|
}
|
|
statement '}' fill_opt memspec_opt
|
|
{
|
|
lang_leave_output_section_statement($13, $14);
|
|
}
|
|
|
|
;
|
|
|
|
opt_type:
|
|
'(' NOLOAD ')' { $$ = SEC_NO_FLAGS; }
|
|
| '(' DSECT ')' { $$ = 0; }
|
|
| '(' COPY ')' { $$ = 0; }
|
|
| '(' INFO ')' { $$ = 0; }
|
|
| '(' OVERLAY ')' { $$ = 0; }
|
|
| { $$ = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; }
|
|
;
|
|
|
|
opt_things:
|
|
{
|
|
};
|
|
|
|
|
|
opt_exp:
|
|
exp
|
|
{ $$ = $1; }
|
|
| { $$= (etree_type *)NULL; }
|
|
;
|
|
|
|
opt_block:
|
|
BLOCK '(' exp ')'
|
|
{ $$ = exp_get_value_int($3,
|
|
1L,
|
|
"block",
|
|
lang_first_phase_enum);
|
|
}
|
|
| { $$ = 1; }
|
|
;
|
|
|
|
memspec_opt:
|
|
'>' NAME
|
|
{ $$ = $2; }
|
|
| { $$ = "*default*"; }
|
|
;
|
|
|