binutils-gdb/ld/ldgram.y

%{
/*
 * $Id$ 
 *
 *
*/

/* 
   This is a YACC grammer intended to parse a superset of the AT&T
   linker scripting languaue.


   Written by Steve Chamberlain steve@cygnus.com
*/



#include "sysdep.h"
#include "bfd.h"
#include "ld.h"    
#include "ldexp.h"
#include "ldversion.h"
#include "ldlang.h"
#include "ld-emul.h"
#include "ldfile.h"
#include "ldmisc.h"
#define YYDEBUG 1

boolean option_v;
extern unsigned int lineno;
extern boolean trace_files;
extern boolean write_map;

boolean hex_mode;




lang_memory_region_type *region;


lang_memory_region_type *lang_memory_region_lookup();
lang_output_section_statement_type *lang_output_section_statement_lookup();

#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, bfd_vma block_value);

#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_expression = false;
boolean ldgram_in_script = false;
boolean ldgram_in_defsym = false;
/* LOCALS */




%}
%union {
  bfd_vma integer;
  int voidval;
  char *name;
  int token;
  union etree_union *etree;
  asection *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  exp_head
%type <integer> fill_opt opt_block
%type <name> memspec_opt
%token <integer> INT CHAR 
%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> '*' '/' '%'
%right UNARY
%left <token> '('
%token <token> ALIGN_K BLOCK LONG SHORT BYTE
%token SECTIONS  
%token '{' '}'
%token ALIGNMENT SIZEOF_HEADERS OUTPUT_FORMAT FORCE_COMMON_ALLOCATION
%token NEXT SIZEOF ADDR  SCRIPT ENDSCRIPT
%token MEMORY 
%token DSECT NOLOAD COPY INFO OVERLAY 
%token NAME DEFINED TARGET_K SEARCH_DIR MAP ENTRY 
%token OPTION_e OPTION_c OPTION_noinhibit_exec OPTION_s OPTION_S
%token OPTION_format  OPTION_F OPTION_u

%token OPTION_d OPTION_dc OPTION_dp OPTION_x OPTION_X
%token OPTION_v OPTION_M OPTION_t STARTUP HLL SYSLIB FLOAT NOFLOAT OPTION_defsym
%token OPTION_n OPTION_r OPTION_o OPTION_b  OPTION_A OPTION_R
%token <name> OPTION_l OPTION_L  OPTION_T OPTION_Aarch OPTION_Tfile  OPTION_Texp
%token OPTION_Ur 
%token ORIGIN FILL OPTION_g
%token LENGTH  BIND SUBSECTION_ALIGN   CREATE_OBJECT_SYMBOLS INPUT OUTPUT
%type <token> assign_op SIZEOF NEXT ADDR 
%type <etree> assignment
%type <name>  filename

%{
ld_config_type config;
%}

%%



file:	command_line  { lang_final(); };


filename:
  NAME;

command_line:
		command_line command_line_option
	|
	;

command_line_option:
		SCRIPT ifile_list ENDSCRIPT
	|	OPTION_v
			{	
			ldversion();
			option_v = true;
			}
	|	OPTION_t {
			trace_files = true;
			}
	|	OPTION_M {
			write_map = true;
			}
	|	OPTION_n {
			config.magic_demand_paged = false;
			config.make_executable = 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;
			}
        |       OPTION_Ur {
			config.relocateable_output = true;
			config.build_constructors = true;
			config.magic_demand_paged = 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_d {
			  command_line.force_common_definition = 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_Texp 
		{ 
			hex_mode  =true; 
		} 
		INT
		{ 
			lang_section_start($1,exp_intop($3));
			hex_mode = false; 
		}
	
	| 	OPTION_Aarch 
		{ 
			ldfile_add_arch($1); 
		}
	|	 OPTION_b NAME
			{
			lang_add_target($2);
			}
	|	OPTION_L
			{
			ldfile_add_library_path($1);
			}
	|	OPTION_F
		{
		/* Ignore */
		}
        | 	NAME
		{ lang_add_input_file($1,lang_input_file_is_file_enum,
				 (char *)NULL); }
	|	OPTION_c filename script_file
			{ ldfile_open_command_file($2); }
	|	OPTION_Tfile 
			{ ldfile_open_command_file($1); } script_file

	|	OPTION_T filename 
			{ ldfile_open_command_file($2); } script_file

	|	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 
			{
			ldgram_in_defsym = true;
			ldgram_in_expression = true;	

			}
			 assignment
			{
			ldgram_in_defsym = false;
			ldgram_in_expression = false;
			}	
	| '-' NAME
		 { info("%P%F Unrecognised option -%s\n", $2);  }

	;


  





script_file:
	{ ldgram_in_script = true; }
       ifile_list ENDSCRIPT
        { ldgram_in_script = false; }

        ;


ifile_list:
       ifile_list ifile_p1 
        |
	;



ifile_p1:
		memory
	|	sections
	|	startup
	|	high_level_library
	|	low_level_library
	|	floating_point_support
	|	assignment end
	|	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); }
	|	FORCE_COMMON_ALLOCATION
		{ command_line.force_common_definition = true ; }
	|	INPUT '(' input_list ')'
     	|	MAP '(' filename ')'
		{ lang_add_map($3); }
	;

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:
		statement assignment end
	|	statement CREATE_OBJECT_SYMBOLS
		{
 		  lang_add_attribute(lang_object_symbols_statement_enum); }

	|	statement input_section_spec
        |       statement length '(' exp_head ')'
        	        {
			lang_add_data($2,$4);
			}
  
	|	statement FILL '(' exp_head ')'
			{
			  lang_add_fill
			    (exp_get_value_int($4,
					       0,
					       "fill value",
					       lang_first_phase_enum));
			}
	|
	;

length:
		LONG  
			{ $$ = $1; }
	| 	SHORT 
			{ $$ = $1; }
	|	BYTE 
			{ $$ = $1; }
	;

fill_opt:
          '=' exp_head
		{
		  $$ =	 exp_get_value_int($2,
					   0,
					   "fill value",
					   lang_first_phase_enum); 
		}
	|  	{  $$ = 0; }
	;

		

assign_op:
		PLUSEQ
			{ $$ = '+'; }
	|	MINUSEQ 
			{ $$ = '-'; }
	| 	MULTEQ
			{ $$ = '*'; }
	| 	DIVEQ
			{ $$ = '/'; }
	| 	LSHIFTEQ
			{ $$ = LSHIFT; }
	| 	RSHIFTEQ
			{ $$ = RSHIFT; }
	| 	ANDEQ
			{ $$ = '&'; }
	| 	OREQ
			{ $$ = '|'; }

	;

end:	';' | ','
	;


assignment:
	
		NAME '=' exp_head 
		{
		  lang_add_assignment(exp_assop($2,$1,$3));
		}
	|	NAME assign_op exp_head 
		{
		  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 '=' exp
		{ region->current =
		 region->origin =
		 exp_get_vma($3, 0L,"origin", lang_first_phase_enum); }
	;
length_spec:
             LENGTH '=' exp		
               {  region->length = exp_get_vma($3,
					       ~((bfd_vma)0),
					       "length",
					       lang_first_phase_enum);
		}
	

attributes_opt:
		  '(' NAME ')'
			{
			lang_set_flags(&region->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); }	
	;
		

	

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  '('  NAME ')'
			{ $$ = exp_nameop($1,$3); }
	|	ADDR '(' NAME ')'
			{ $$ = exp_nameop($1,$3); }
	|	ALIGN_K '(' exp ')'
			{ $$ = exp_unop($1,$3); }
	|	NAME
			{ $$ = exp_nameop(NAME,$1); }
	;




section:	NAME opt_exp opt_block ':' opt_things'{' 
		{
		lang_enter_output_section_statement($1,$2,$3);
		}
	       statement 	'}' 	fill_opt memspec_opt
		{
		  lang_leave_output_section_statement($10, $11);
		}

	;

opt_things: 
	{

	}
	;

exp_head:
		{ 
		ldgram_in_expression = true; 
		}
	exp
		{
		ldgram_in_expression = false; 
		$$ = $2;
		}
	;

opt_exp:
		exp_head
			{ $$ = $1; }
	|		{ $$= (etree_type *)NULL; }
	;

opt_block:
		BLOCK '(' exp_head ')'
		{ $$ = exp_get_value_int($3,
					 1L,
					 "block",
					 lang_first_phase_enum); 
		}
	|	{ $$  = 1; }
	;
  
memspec_opt:
		'>' NAME
		{ $$ = $2; }
	|	{ $$ = "*default*"; }
	;