887 lines
17 KiB
Plaintext
887 lines
17 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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#include "mri.h"
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#define YYDEBUG 1
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extern unsigned int lineno;
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extern boolean trace_file_tries;
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extern boolean trace_files;
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extern boolean write_map;
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extern int g_switch_value;
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boolean hex_mode;
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static int typebits;
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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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etree_type *lang_atin();
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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,etree_type*,etree_type*, etree_type*);
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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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#define ERROR_NAME_MAX 20
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static char *error_names[ERROR_NAME_MAX];
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static int error_index;
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#define PUSH_ERROR(x) if (error_index < ERROR_NAME_MAX) error_names[error_index] = x; error_index++;
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#define POP_ERROR() error_index--;
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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_with_type mustbe_exp opt_at
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%type <integer> fill_opt
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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 INCLUDE
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%token MEMORY DEFSYMEND
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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_EB OPTION_EL OPTION_G OPTION_Gval OPTION_help
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%token OPTION_format OPTION_oformat 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_memul OPTION_M OPTION_t STARTUP HLL SYSLIB FLOAT NOFLOAT
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%token OPTION_L OPTION_Map
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%token OPTION_n OPTION_r OPTION_o OPTION_b OPTION_R OPTION_relax OPTION_version
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%token <name> OPTION_l OPTION_Lfile OPTION_T OPTION_Aarch OPTION_Tfile
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%token <name> OPTION_Texp OPTION_y
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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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%token OPTION_RETAIN_SYMBOLS_FILE ALIGNMOD AT
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%type <token> assign_op
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%type <name> filename
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%token CHIP LIST SECT ABSOLUTE LOAD NEWLINE ENDWORD ORDER NAMEWORD
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%token FORMAT PUBLIC DEFSYMEND BASE ALIAS TRUNCATE
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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_help
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{
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help ();
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exit (0);
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}
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| OPTION_v
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{
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ldversion(0);
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}
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| OPTION_V
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{
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ldversion(1);
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trace_file_tries = true;
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}
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| OPTION_version
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{
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ldversion(0);
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exit(0);
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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 NAME
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{
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/* Ignore. */
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}
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| OPTION_memul
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{
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/* Ignore. */
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}
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| OPTION_M
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{
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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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{
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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_oformat NAME
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{
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lang_add_output_format($2, 0);
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}
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| OPTION_Texp
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{ ldlex_expression();
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hex_mode = 16;
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}
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INT
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{ ldlex_popstate();
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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_y
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{
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add_ysym($1);
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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 NAME
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{
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ldfile_add_library_path($2);
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}
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| OPTION_Lfile
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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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| OPTION_c filename
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{ldfile_open_command_file($2); }
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mri_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_defsym(); }
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NAME '=' exp DEFSYMEND { ldlex_popstate();
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lang_add_assignment(exp_assop($4,$3,$5));
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}
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| OPTION_RETAIN_SYMBOLS_FILE filename
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{ lang_add_keepsyms_file ($2); }
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| OPTION_EB
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{
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/* FIXME: This is currently ignored. It means
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``produce a big-endian object file''. It could
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be used to select an output format. */
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}
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| OPTION_EL
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{
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/* FIXME: This is currently ignored. It means
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``produce a little-endian object file''. It could
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be used to select an output format. */
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}
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| OPTION_G NAME
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{
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g_switch_value = atoi ($2);
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}
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| OPTION_Gval
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{
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g_switch_value = yylval.integer;
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}
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| NAME
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{
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if (*$1 == '-')
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einfo("%P%F: illegal option -- %s\n", $1);
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else
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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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}
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;
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/* SYNTAX WITHIN AN MRI SCRIPT FILE */
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mri_script_file:
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{ ldlex_mri_script();
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PUSH_ERROR("MRI style script");
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}
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mri_script_lines
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{ ldlex_popstate();
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POP_ERROR();
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}
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;
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mri_script_lines:
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mri_script_lines mri_script_command NEWLINE
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;
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mri_script_command:
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CHIP exp
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| CHIP exp ',' exp
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| NAME {
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einfo("%P%F: unrecognised keyword in MRI style script '%s'\n",$1);
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}
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| LIST {
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write_map = true;
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config.map_filename = "-";
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}
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| ORDER ordernamelist
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| ENDWORD
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| PUBLIC NAME '=' exp
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{ mri_public($2, $4); }
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| PUBLIC NAME ',' exp
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{ mri_public($2, $4); }
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| PUBLIC NAME exp
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{ mri_public($2, $3); }
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| FORMAT NAME
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{ mri_format($2); }
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| SECT NAME ',' exp
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{ mri_output_section($2, $4);}
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| SECT NAME exp
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{ mri_output_section($2, $3);}
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| SECT NAME '=' exp
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{ mri_output_section($2, $4);}
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| ALIGN_K NAME '=' exp
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{ mri_align($2,$4); }
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| ALIGNMOD NAME '=' exp
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{ mri_alignmod($2,$4); }
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| ABSOLUTE mri_abs_name_list
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| LOAD mri_load_name_list
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| NAMEWORD NAME
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{ mri_name($2); }
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| ALIAS NAME ',' NAME
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{ mri_alias($2,$4,0);}
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| ALIAS NAME ',' INT
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{ mri_alias($2,0,$4);}
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| BASE exp
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{ mri_base($2); }
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| TRUNCATE INT
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{ mri_truncate($2); }
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;
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ordernamelist:
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ordernamelist ',' NAME { mri_order($3); }
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| ordernamelist NAME { mri_order($2); }
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;
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mri_load_name_list:
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NAME
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{ mri_load($1); }
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| mri_load_name_list ',' NAME { mri_load($3); }
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;
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mri_abs_name_list:
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NAME
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{ mri_only_load($1); }
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| mri_abs_name_list ',' NAME
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{ mri_only_load($3); }
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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, 1); }
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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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| INCLUDE filename
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{ ldfile_open_command_file($2); } ifile_list END
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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,
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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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{
|
|
current_file = (char *)NULL;
|
|
}
|
|
'(' file_NAME_list ')'
|
|
;
|
|
|
|
statement:
|
|
assignment end
|
|
| CREATE_OBJECT_SYMBOLS
|
|
{
|
|
lang_add_attribute(lang_object_symbols_statement_enum);
|
|
}
|
|
| ';'
|
|
| CONSTRUCTORS
|
|
{
|
|
|
|
lang_add_attribute(lang_constructors_statement_enum);
|
|
}
|
|
| input_section_spec
|
|
| length '(' exp ')'
|
|
{
|
|
lang_add_data($1,$3);
|
|
}
|
|
|
|
| FILL '(' exp ')'
|
|
{
|
|
lang_add_fill
|
|
(exp_get_value_int($3,
|
|
0,
|
|
"fill value",
|
|
lang_first_phase_enum));
|
|
}
|
|
;
|
|
|
|
statement_list:
|
|
statement_list statement
|
|
| statement
|
|
;
|
|
|
|
statement_list_opt:
|
|
/* empty */
|
|
| statement_list
|
|
;
|
|
|
|
length:
|
|
LONG
|
|
{ $$ = $1; }
|
|
| SHORT
|
|
{ $$ = $1; }
|
|
| BYTE
|
|
{ $$ = $1; }
|
|
;
|
|
|
|
fill_opt:
|
|
'=' mustbe_exp
|
|
{
|
|
$$ = exp_get_value_int($2,
|
|
0,
|
|
"fill value",
|
|
lang_first_phase_enum);
|
|
}
|
|
| { $$ = 0; }
|
|
;
|
|
|
|
|
|
|
|
assign_op:
|
|
PLUSEQ
|
|
{ $$ = '+'; }
|
|
| MINUSEQ
|
|
{ $$ = '-'; }
|
|
| MULTEQ
|
|
{ $$ = '*'; }
|
|
| DIVEQ
|
|
{ $$ = '/'; }
|
|
| LSHIFTEQ
|
|
{ $$ = LSHIFT; }
|
|
| RSHIFTEQ
|
|
{ $$ = RSHIFT; }
|
|
| ANDEQ
|
|
{ $$ = '&'; }
|
|
| OREQ
|
|
{ $$ = '|'; }
|
|
|
|
;
|
|
|
|
end: ';' | ','
|
|
;
|
|
|
|
|
|
assignment:
|
|
NAME '=' mustbe_exp
|
|
{
|
|
lang_add_assignment(exp_assop($2,$1,$3));
|
|
}
|
|
| NAME assign_op mustbe_exp
|
|
{
|
|
|
|
lang_add_assignment(exp_assop('=',$1,exp_binop($2,exp_nameop(NAME,$1),$3)));
|
|
}
|
|
|
|
;
|
|
|
|
|
|
opt_comma:
|
|
',' | ;
|
|
|
|
|
|
memory:
|
|
MEMORY '{' memory_spec memory_spec_list '}'
|
|
;
|
|
|
|
memory_spec_list:
|
|
memory_spec_list memory_spec
|
|
| memory_spec_list ',' memory_spec
|
|
|
|
|
;
|
|
|
|
|
|
memory_spec: NAME
|
|
{ region = lang_memory_region_lookup($1); }
|
|
attributes_opt ':'
|
|
origin_spec opt_comma length_spec
|
|
|
|
; origin_spec:
|
|
ORIGIN '=' mustbe_exp
|
|
{ region->current =
|
|
region->origin =
|
|
exp_get_vma($3, 0L,"origin", lang_first_phase_enum);
|
|
}
|
|
; length_spec:
|
|
LENGTH '=' mustbe_exp
|
|
{ region->length = exp_get_vma($3,
|
|
~((bfd_vma)0),
|
|
"length",
|
|
lang_first_phase_enum);
|
|
}
|
|
|
|
|
|
attributes_opt:
|
|
'(' NAME ')'
|
|
{
|
|
lang_set_flags(®ion->flags, $2);
|
|
}
|
|
|
|
|
|
|
;
|
|
|
|
startup:
|
|
STARTUP '(' filename ')'
|
|
{ lang_startup($3); }
|
|
;
|
|
|
|
high_level_library:
|
|
HLL '(' high_level_library_NAME_list ')'
|
|
| HLL '(' ')'
|
|
{ ldemul_hll((char *)NULL); }
|
|
;
|
|
|
|
high_level_library_NAME_list:
|
|
high_level_library_NAME_list opt_comma filename
|
|
{ ldemul_hll($3); }
|
|
| filename
|
|
{ ldemul_hll($1); }
|
|
|
|
;
|
|
|
|
low_level_library:
|
|
SYSLIB '(' low_level_library_NAME_list ')'
|
|
; low_level_library_NAME_list:
|
|
low_level_library_NAME_list opt_comma filename
|
|
{ ldemul_syslib($3); }
|
|
|
|
|
;
|
|
|
|
floating_point_support:
|
|
FLOAT
|
|
{ lang_float(true); }
|
|
| NOFLOAT
|
|
{ lang_float(false); }
|
|
;
|
|
|
|
|
|
mustbe_exp: { ldlex_expression(); }
|
|
exp
|
|
{ ldlex_popstate(); $$=$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); }
|
|
| ABSOLUTE '(' exp ')'
|
|
{ $$ = exp_unop(ABSOLUTE, $3); }
|
|
| ALIGN_K '(' exp ')'
|
|
{ $$ = exp_unop(ALIGN_K,$3); }
|
|
| NAME
|
|
{ $$ = exp_nameop(NAME,$1); }
|
|
;
|
|
|
|
|
|
opt_at:
|
|
AT '(' exp ')' { $$ = $3; }
|
|
| { $$ = 0; }
|
|
;
|
|
|
|
section: NAME { ldlex_expression(); }
|
|
opt_exp_with_type
|
|
opt_at { ldlex_popstate(); }
|
|
'{'
|
|
{
|
|
lang_enter_output_section_statement($1,$3,typebits,0,0,0,$4);
|
|
}
|
|
statement_list_opt
|
|
'}' {ldlex_expression();} fill_opt memspec_opt
|
|
{
|
|
ldlex_popstate();
|
|
lang_leave_output_section_statement($11, $12);
|
|
}
|
|
opt_comma
|
|
|
|
;
|
|
|
|
type:
|
|
NOLOAD { typebits = SEC_NEVER_LOAD; }
|
|
| DSECT { typebits = 0; }
|
|
| COPY { typebits = 0; }
|
|
| INFO { typebits = 0; }
|
|
| OVERLAY { typebits = 0; }
|
|
| { typebits = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; }
|
|
;
|
|
|
|
|
|
opt_exp_with_type:
|
|
exp ':' { $$ = $1; typebits =0;}
|
|
| exp '(' type ')' ':' { $$ = $1; }
|
|
| ':' { $$= (etree_type *)NULL; typebits = 0; }
|
|
| '(' type ')' ':' { $$= (etree_type *)NULL; }
|
|
;
|
|
|
|
memspec_opt:
|
|
'>' NAME
|
|
{ $$ = $2; }
|
|
| { $$ = "*default*"; }
|
|
;
|
|
%%
|
|
void
|
|
yyerror(arg)
|
|
char *arg;
|
|
{
|
|
if (error_index> 0 && error_index < ERROR_NAME_MAX)
|
|
einfo("%P%F: %S syntax error in %s\n",error_names[error_index-1]);
|
|
else
|
|
einfo("%P%F: %S syntax error\n");
|
|
}
|