/* A YACC grammer to parse a superset of the AT&T linker scripting languaue.
Copyright (C) 1991 Free Software Foundation, Inc.
Written by Steve Chamberlain of Cygnus Support (steve@cygnus.com).
This file is part of GNU ld.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
%{
/*
*/
#define DONTDECLARE_MALLOC
#include "bfd.h"
#include "sysdep.h"
#include "ld.h"
#include "ldexp.h"
#include "ldver.h"
#include "ldlang.h"
#include "ldemul.h"
#include "ldfile.h"
#include "ldmisc.h"
#include "mri.h"
#define YYDEBUG 1
extern unsigned int lineno;
extern boolean trace_file_tries;
extern boolean trace_files;
extern boolean write_map;
extern int g_switch_value;
boolean hex_mode;
static int typebits;
strip_symbols_type strip_symbols=STRIP_NONE;
discard_locals_type discard_locals=DISCARD_NONE;
lang_memory_region_type *region;
lang_memory_region_type *lang_memory_region_lookup();
lang_output_section_statement_type *lang_output_section_statement_lookup();
etree_type *lang_atin();
#ifdef __STDC__
void lang_add_data(int type, union etree_union *exp);
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*);
#else
void lang_add_data();
void lang_enter_output_section_statement();
#endif /* __STDC__ */
extern args_type command_line;
char *current_file;
boolean ldgram_want_filename = true;
boolean had_script = false;
boolean force_make_executable = false;
boolean ldgram_in_script = false;
boolean ldgram_had_equals = false;
/* LOCALS */
#define ERROR_NAME_MAX 20
static char *error_names[ERROR_NAME_MAX];
static int error_index;
#define PUSH_ERROR(x) if (error_index < ERROR_NAME_MAX) error_names[error_index] = x; error_index++;
#define POP_ERROR() error_index--;
%}
%union {
bfd_vma integer;
int voidval;
char *name;
int token;
union etree_union *etree;
struct sec *section;
struct lang_output_section_statement_struct *output_section_statement;
union lang_statement_union **statement_ptr;
int lineno;
struct {
FILE *file;
char *name;
unsigned int lineno;
} state;
}
%type <etree> exp opt_exp_with_type mustbe_exp opt_at
%type <integer> fill_opt
%type <name> memspec_opt
%token <integer> INT
%token <name> NAME
%type <integer> length
%right <token> PLUSEQ MINUSEQ MULTEQ DIVEQ '=' LSHIFTEQ RSHIFTEQ ANDEQ OREQ
%right <token> '?' ':'
%left <token> OROR
%left <token> ANDAND
%left <token> '|'
%left <token> '^'
%left <token> '&'
%left <token> EQ NE
%left <token> '<' '>' LE GE
%left <token> LSHIFT RSHIFT
%left <token> '+' '-'
%left <token> '*' '/' '%'
/*%token <token> '+' '-' '*' '/' '%'*/
%right UNARY
%token END
%left <token> '('
%token <token> ALIGN_K BLOCK LONG SHORT BYTE
%token SECTIONS
%token '{' '}'
%token SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION OUTPUT_ARCH
%token SIZEOF_HEADERS
%token INCLUDE
%token MEMORY DEFSYMEND
%token NOLOAD DSECT COPY INFO OVERLAY
%token NAME DEFINED TARGET_K SEARCH_DIR MAP ENTRY
%token OPTION_e OPTION_c OPTION_noinhibit_exec OPTION_s OPTION_S OPTION_sort_common
%token OPTION_EB OPTION_EL OPTION_G OPTION_Gval OPTION_help
%token OPTION_format OPTION_oformat OPTION_F OPTION_u OPTION_Bstatic OPTION_N
%token <integer> SIZEOF NEXT ADDR
%token OPTION_d OPTION_dc OPTION_dp OPTION_x OPTION_X OPTION_defsym
%token OPTION_v OPTION_V OPTION_m OPTION_memul OPTION_M OPTION_t STARTUP HLL SYSLIB FLOAT NOFLOAT
%token OPTION_L OPTION_Map
%token OPTION_n OPTION_r OPTION_o OPTION_b OPTION_R OPTION_relax OPTION_version
%token <name> OPTION_l OPTION_Lfile OPTION_T OPTION_Aarch OPTION_Tfile
%token <name> OPTION_Texp OPTION_y
%token OPTION_Ur
%token ORIGIN FILL OPTION_g
%token LENGTH CREATE_OBJECT_SYMBOLS INPUT OUTPUT CONSTRUCTORS
%token OPTION_RETAIN_SYMBOLS_FILE ALIGNMOD AT
%type <token> assign_op
%type <name> filename
%token CHIP LIST SECT ABSOLUTE LOAD NEWLINE ENDWORD ORDER NAMEWORD
%token FORMAT PUBLIC DEFSYMEND BASE ALIAS TRUNCATE
%{
ld_config_type config;
%}
%%
file: command_line { lang_final(); };
filename: NAME;
command_line:
command_line command_line_option
|
;
command_line_option:
OPTION_Bstatic { }
| OPTION_help
{
help ();
exit (0);
}
| OPTION_v
{
ldversion(0);
}
| OPTION_V
{
ldversion(1);
trace_file_tries = true;
}
| OPTION_version
{
ldversion(0);
exit(0);
}
| OPTION_t {
trace_files = true;
}
| OPTION_Map NAME
{
write_map = true;
config.map_filename = $2;
}
| OPTION_m NAME
{
/* Ignore. */
}
| OPTION_memul
{
/* Ignore. */
}
| OPTION_M
{
config.map_filename = "-";
}
| OPTION_n {
config.magic_demand_paged = false;
}
| OPTION_N {
config.text_read_only = false;
config.magic_demand_paged = false;
}
| OPTION_s {
strip_symbols = STRIP_ALL;
}
| OPTION_S {
strip_symbols = STRIP_DEBUGGER;
}
| OPTION_u NAME {
ldlang_add_undef($2);
}
| OPTION_r {
config.relocateable_output = true;
config.build_constructors = false;
config.magic_demand_paged = false;
config.text_read_only = false;
}
| OPTION_Ur {
config.relocateable_output = true;
config.build_constructors = true;
config.magic_demand_paged = false;
config.text_read_only = false;
}
| OPTION_o filename
{
lang_add_output($2);
}
| OPTION_e NAME
{ lang_add_entry($2);
}
| OPTION_X {
discard_locals = DISCARD_L;
}
| OPTION_x {
discard_locals = DISCARD_ALL;
}
| OPTION_noinhibit_exec
{
force_make_executable = true;
}
| OPTION_sort_common
{
config.sort_common = true;
}
| OPTION_d {
command_line.force_common_definition = true;
}
| OPTION_relax {
command_line.relax = true;
}
| OPTION_dc
{
command_line.force_common_definition = true;
}
| OPTION_g
{
/* Ignored */
}
| OPTION_dp
{
command_line.force_common_definition = true;
}
| OPTION_format NAME
{
lang_add_target($2);
}
| OPTION_oformat NAME
{
lang_add_output_format($2, 0);
}
| OPTION_Texp
{ ldlex_expression();
hex_mode = 16;
}
INT
{ ldlex_popstate();
lang_section_start($1,exp_intop($3));
hex_mode = 0;
}
| OPTION_y
{
add_ysym($1);
}
| OPTION_Aarch
{
ldfile_add_arch($1);
}
| OPTION_b NAME
{
lang_add_target($2);
}
| OPTION_L NAME
{
ldfile_add_library_path($2);
}
| OPTION_Lfile
{
ldfile_add_library_path($1);
}
| OPTION_F
{
/* Ignore */
}
| OPTION_c filename
{ldfile_open_command_file($2); }
mri_script_file END { ldlex_command();}
| OPTION_Tfile
{ ldfile_open_command_file($1); } script_file
END { ldlex_command();}
| OPTION_T filename
{ ldfile_open_command_file($2); } script_file
END { ldlex_command();}
| OPTION_l
{
lang_add_input_file($1,
lang_input_file_is_l_enum,
(char *)NULL);
}
| OPTION_R filename
{
lang_add_input_file($2,
lang_input_file_is_symbols_only_enum,
(char *)NULL);
}
| OPTION_defsym { ldlex_defsym(); }
NAME '=' exp DEFSYMEND { ldlex_popstate();
lang_add_assignment(exp_assop($4,$3,$5));
}
| OPTION_RETAIN_SYMBOLS_FILE filename
{ lang_add_keepsyms_file ($2); }
| OPTION_EB
{
/* FIXME: This is currently ignored. It means
``produce a big-endian object file''. It could
be used to select an output format. */
}
| OPTION_EL
{
/* FIXME: This is currently ignored. It means
``produce a little-endian object file''. It could
be used to select an output format. */
}
| OPTION_G NAME
{
g_switch_value = atoi ($2);
}
| OPTION_Gval
{
g_switch_value = yylval.integer;
}
| NAME
{
if (*$1 == '-')
einfo("%P%F: illegal option -- %s\n", $1);
else
lang_add_input_file($1,lang_input_file_is_file_enum,
(char *)NULL);
}
;
/* SYNTAX WITHIN AN MRI SCRIPT FILE */
mri_script_file:
{ ldlex_mri_script();
PUSH_ERROR("MRI style script");
}
mri_script_lines
{ ldlex_popstate();
POP_ERROR();
}
;
mri_script_lines:
mri_script_lines mri_script_command NEWLINE
|
;
mri_script_command:
CHIP exp
| CHIP exp ',' exp
| NAME {
einfo("%P%F: unrecognised keyword in MRI style script '%s'\n",$1);
}
| LIST {
write_map = true;
config.map_filename = "-";
}
| ORDER ordernamelist
| ENDWORD
| PUBLIC NAME '=' exp
{ mri_public($2, $4); }
| PUBLIC NAME ',' exp
{ mri_public($2, $4); }
| PUBLIC NAME exp
{ mri_public($2, $3); }
| FORMAT NAME
{ mri_format($2); }
| SECT NAME ',' exp
{ mri_output_section($2, $4);}
| SECT NAME exp
{ mri_output_section($2, $3);}
| SECT NAME '=' exp
{ mri_output_section($2, $4);}
| ALIGN_K NAME '=' exp
{ mri_align($2,$4); }
| ALIGNMOD NAME '=' exp
{ mri_alignmod($2,$4); }
| ABSOLUTE mri_abs_name_list
| LOAD mri_load_name_list
| NAMEWORD NAME
{ mri_name($2); }
| ALIAS NAME ',' NAME
{ mri_alias($2,$4,0);}
| ALIAS NAME ',' INT
{ mri_alias($2,0,$4);}
| BASE exp
{ mri_base($2); }
| TRUNCATE INT
{ mri_truncate($2); }
|
;
ordernamelist:
ordernamelist ',' NAME { mri_order($3); }
| ordernamelist NAME { mri_order($2); }
|
;
mri_load_name_list:
NAME
{ mri_load($1); }
| mri_load_name_list ',' NAME { mri_load($3); }
;
mri_abs_name_list:
NAME
{ mri_only_load($1); }
| mri_abs_name_list ',' NAME
{ mri_only_load($3); }
;
script_file:
{
ldlex_both();
}
ifile_list
{
ldlex_popstate();
}
;
ifile_list:
ifile_list ifile_p1
|
;
ifile_p1:
memory
| sections
| startup
| high_level_library
| low_level_library
| floating_point_support
| statement_anywhere
| ';'
| TARGET_K '(' NAME ')'
{ lang_add_target($3); }
| SEARCH_DIR '(' filename ')'
{ ldfile_add_library_path($3); }
| OUTPUT '(' filename ')'
{ lang_add_output($3); }
| OUTPUT_FORMAT '(' NAME ')'
{ lang_add_output_format($3, 1); }
| OUTPUT_ARCH '(' NAME ')'
{ ldfile_set_output_arch($3); }
| FORCE_COMMON_ALLOCATION
{ command_line.force_common_definition = true ; }
| INPUT '(' input_list ')'
| MAP '(' filename ')'
{ lang_add_map($3); }
| INCLUDE filename
{ ldfile_open_command_file($2); } ifile_list END
;
input_list:
NAME
{ lang_add_input_file($1,lang_input_file_is_file_enum,
(char *)NULL); }
| input_list ',' NAME
{ lang_add_input_file($3,lang_input_file_is_file_enum,
(char *)NULL); }
| input_list NAME
{ lang_add_input_file($2,
lang_input_file_is_file_enum,
(char *)NULL); }
;
sections:
SECTIONS '{' sec_or_group_p1 '}'
;
sec_or_group_p1:
sec_or_group_p1 section
| sec_or_group_p1 statement_anywhere
|
;
statement_anywhere:
ENTRY '(' NAME ')'
{ lang_add_entry($3); }
| assignment end
;
file_NAME_list:
NAME
{ lang_add_wild($1, current_file); }
| file_NAME_list opt_comma NAME
{ lang_add_wild($3, current_file); }
;
input_section_spec:
NAME
{
lang_add_wild((char *)NULL, $1);
}
| '['
{
current_file = (char *)NULL;
}
file_NAME_list
']'
| NAME
{
current_file =$1;
}
'(' file_NAME_list ')'
| '*'
{
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");
}