641 lines
13 KiB
Plaintext
641 lines
13 KiB
Plaintext
/* A YACC grammer to parse a superset of the AT&T linker scripting languaue.
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Copyright (C) 1991, 1993 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 "bfdlink.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 "ldmain.h"
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#include "mri.h"
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#include "ldlex.h"
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static int typebits;
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lang_memory_region_type *region;
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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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#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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char *name;
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int token;
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union etree_union *etree;
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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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%right UNARY
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%token END
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%left <token> '('
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%token <token> ALIGN_K BLOCK QUAD 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 <integer> SIZEOF NEXT ADDR
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%token STARTUP HLL SYSLIB FLOAT NOFLOAT
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%token ORIGIN FILL
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%token LENGTH CREATE_OBJECT_SYMBOLS INPUT GROUP OUTPUT CONSTRUCTORS
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%token ALIGNMOD AT PROVIDE
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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 REL
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%token INPUT_SCRIPT INPUT_MRI_SCRIPT INPUT_DEFSYM
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%%
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file:
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INPUT_SCRIPT script_file
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| INPUT_MRI_SCRIPT mri_script_file
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| INPUT_DEFSYM defsym_expr
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;
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filename: NAME;
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defsym_expr:
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{ ldlex_defsym(); }
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NAME '=' exp
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{
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ldlex_popstate();
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lang_add_assignment(exp_assop($3,$2,$4));
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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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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,(int) $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((unsigned int) $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, false); }
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| OUTPUT '(' filename ')'
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{ lang_add_output($3, 1); }
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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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| GROUP
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{ lang_enter_group (); }
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'(' input_list ')'
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{ lang_leave_group (); }
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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_search_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_search_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_search_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, 0); }
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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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assignment end
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| CREATE_OBJECT_SYMBOLS
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{
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lang_add_attribute(lang_object_symbols_statement_enum);
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}
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| ';'
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| CONSTRUCTORS
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{
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lang_add_attribute(lang_constructors_statement_enum);
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}
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| input_section_spec
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| length '(' exp ')'
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{
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lang_add_data((int) $1,$3);
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}
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| FILL '(' exp ')'
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{
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lang_add_fill
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(exp_get_value_int($3,
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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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statement_list:
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statement_list statement
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| statement
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;
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statement_list_opt:
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/* empty */
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| statement_list
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;
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length:
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QUAD
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{ $$ = $1; }
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| LONG
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{ $$ = $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,
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exp_binop ($2,
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exp_nameop (NAME,
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$1),
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$3)));
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}
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| PROVIDE '(' NAME '=' mustbe_exp ')'
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{
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lang_add_assignment (exp_provide ($3, $5));
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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: 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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; 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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; 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(); $$=$2;}
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;
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exp :
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'-' exp %prec UNARY
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{ $$ = exp_unop('-', $2); }
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| '(' exp ')'
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{ $$ = $2; }
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| NEXT '(' exp ')' %prec UNARY
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{ $$ = exp_unop((int) $1,$3); }
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| '!' exp %prec UNARY
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{ $$ = exp_unop('!', $2); }
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| '+' exp %prec UNARY
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{ $$ = $2; }
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| '~' exp %prec UNARY
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{ $$ = exp_unop('~', $2);}
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| exp '*' exp
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{ $$ = exp_binop('*', $1, $3); }
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| exp '/' exp
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{ $$ = exp_binop('/', $1, $3); }
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| exp '%' exp
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{ $$ = exp_binop('%', $1, $3); }
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| exp '+' exp
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{ $$ = exp_binop('+', $1, $3); }
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| exp '-' exp
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{ $$ = exp_binop('-' , $1, $3); }
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| exp LSHIFT exp
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{ $$ = exp_binop(LSHIFT , $1, $3); }
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| exp RSHIFT exp
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{ $$ = exp_binop(RSHIFT , $1, $3); }
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| exp EQ exp
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{ $$ = exp_binop(EQ , $1, $3); }
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| exp NE exp
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{ $$ = exp_binop(NE , $1, $3); }
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| exp LE exp
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{ $$ = exp_binop(LE , $1, $3); }
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| exp GE exp
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{ $$ = exp_binop(GE , $1, $3); }
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| exp '<' exp
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{ $$ = exp_binop('<' , $1, $3); }
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| exp '>' exp
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{ $$ = exp_binop('>' , $1, $3); }
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| exp '&' exp
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{ $$ = exp_binop('&' , $1, $3); }
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| exp '^' exp
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{ $$ = exp_binop('^' , $1, $3); }
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| exp '|' exp
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{ $$ = exp_binop('|' , $1, $3); }
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| exp '?' exp ':' exp
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{ $$ = exp_trinop('?' , $1, $3, $5); }
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| exp ANDAND exp
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{ $$ = exp_binop(ANDAND , $1, $3); }
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| exp OROR exp
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{ $$ = exp_binop(OROR , $1, $3); }
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| DEFINED '(' NAME ')'
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{ $$ = exp_nameop(DEFINED, $3); }
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| INT
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{ $$ = exp_intop($1); }
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| SIZEOF_HEADERS
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{ $$ = exp_nameop(SIZEOF_HEADERS,0); }
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| SIZEOF '(' NAME ')'
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{ $$ = exp_nameop(SIZEOF,$3); }
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| ADDR '(' NAME ')'
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{ $$ = exp_nameop(ADDR,$3); }
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| ABSOLUTE '(' exp ')'
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{ $$ = exp_unop(ABSOLUTE, $3); }
|
|
| ALIGN_K '(' exp ')'
|
|
{ $$ = exp_unop(ALIGN_K,$3); }
|
|
| BLOCK '(' exp ')'
|
|
{ $$ = exp_unop(ALIGN_K,$3); }
|
|
| NAME
|
|
{ $$ = exp_nameop(NAME,$1); }
|
|
;
|
|
|
|
|
|
opt_at:
|
|
AT '(' exp ')' { $$ = $3; }
|
|
| { $$ = 0; }
|
|
;
|
|
|
|
section: NAME { ldlex_expression(); }
|
|
opt_exp_with_type
|
|
opt_at { ldlex_popstate(); }
|
|
'{'
|
|
{
|
|
lang_enter_output_section_statement($1,$3,typebits,0,0,0,$4);
|
|
}
|
|
statement_list_opt
|
|
'}' {ldlex_expression();} memspec_opt fill_opt
|
|
{
|
|
ldlex_popstate();
|
|
lang_leave_output_section_statement($12, $11);
|
|
}
|
|
opt_comma
|
|
|
|
;
|
|
|
|
type:
|
|
NOLOAD { typebits = SEC_NEVER_LOAD; }
|
|
| DSECT { typebits = 0; }
|
|
| COPY { typebits = 0; }
|
|
| INFO { typebits = 0; }
|
|
| OVERLAY { typebits = 0; }
|
|
| { typebits = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; }
|
|
;
|
|
|
|
|
|
opt_exp_with_type:
|
|
exp ':' { $$ = $1; typebits =0;}
|
|
| exp '(' type ')' ':' { $$ = $1; }
|
|
| ':' { $$= (etree_type *)NULL; typebits = 0; }
|
|
| '(' type ')' ':' { $$= (etree_type *)NULL; }
|
|
;
|
|
|
|
memspec_opt:
|
|
'>' NAME
|
|
{ $$ = $2; }
|
|
| { $$ = "*default*"; }
|
|
;
|
|
%%
|
|
void
|
|
yyerror(arg)
|
|
const char *arg;
|
|
{
|
|
if (ldfile_assumed_script)
|
|
einfo ("%P:%s: file format not recognized; treating as linker script\n",
|
|
ldfile_input_filename);
|
|
if (error_index > 0 && error_index < ERROR_NAME_MAX)
|
|
einfo ("%P%F:%S: %s in %s\n", arg, error_names[error_index-1]);
|
|
else
|
|
einfo ("%P%F:%S: %s\n", arg);
|
|
}
|