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/* * Generic thunking code to convert data between host and target CPU
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* Copyright ( c ) 2003 Fabrice Bellard
*
* This library is free software ; you can redistribute it and / or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation ; either
* version 2 of the License , or ( at your option ) any later version .
*
* This library 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
* Lesser General Public License for more details .
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library ; if not , write to the Free Software
* Foundation , Inc ., 59 Temple Place , Suite 330 , Boston , MA 02111 - 1307 USA
*/
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# ifndef THUNK_H # define THUNK_H # include < inttypes . h >
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# include "cpu.h"
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/* types enums definitions */ typedef enum argtype { TYPE_NULL ,
TYPE_CHAR ,
TYPE_SHORT ,
TYPE_INT ,
TYPE_LONG ,
TYPE_ULONG ,
TYPE_PTRVOID , /* pointer on unknown data */
TYPE_LONGLONG ,
TYPE_ULONGLONG ,
TYPE_PTR ,
TYPE_ARRAY ,
TYPE_STRUCT ,
} argtype ; # define MK_PTR ( type ) TYPE_PTR , type # define MK_ARRAY ( type , size ) TYPE_ARRAY , size , type # define MK_STRUCT ( id ) TYPE_STRUCT , id # define THUNK_TARGET 0 # define THUNK_HOST 1 typedef struct { /* standard struct handling */
const argtype * field_types ;
int nb_fields ;
int * field_offsets [ 2 ];
/* special handling */
void ( * convert [ 2 ])( void * dst , const void * src );
int size [ 2 ];
int align [ 2 ];
const char * name ;
} StructEntry ; /* Translation table for bitmasks... */ typedef struct bitmask_transtbl { unsigned int x86_mask ;
unsigned int x86_bits ;
unsigned int alpha_mask ;
unsigned int alpha_bits ;
} bitmask_transtbl ; void thunk_register_struct ( int id , const char * name , const argtype * types ); void thunk_register_struct_direct ( int id , const char * name , StructEntry * se1 );
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const argtype * thunk_convert ( void * dst , const void * src ,
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const argtype * type_ptr , int to_host );
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# ifndef NO_THUNK_TYPE_SIZE
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extern StructEntry struct_entries []; static inline int thunk_type_size ( const argtype * type_ptr , int is_host ) { int type , size ;
const StructEntry * se ;
type = * type_ptr ;
switch ( type ) {
case TYPE_CHAR :
return 1 ;
case TYPE_SHORT :
return 2 ;
case TYPE_INT :
return 4 ;
case TYPE_LONGLONG :
case TYPE_ULONGLONG :
return 8 ;
case TYPE_LONG :
case TYPE_ULONG :
case TYPE_PTRVOID :
case TYPE_PTR :
if ( is_host ) {
return HOST_LONG_SIZE ;
} else {
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return TARGET_ABI_BITS / 8 ;
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}
break ;
case TYPE_ARRAY :
size = type_ptr [ 1 ];
return size * thunk_type_size ( type_ptr + 2 , is_host );
case TYPE_STRUCT :
se = struct_entries + type_ptr [ 1 ];
return se -> size [ is_host ];
default :
return - 1 ;
}
} static inline int thunk_type_align ( const argtype * type_ptr , int is_host ) { int type ;
const StructEntry * se ;
type = * type_ptr ;
switch ( type ) {
case TYPE_CHAR :
return 1 ;
case TYPE_SHORT :
return 2 ;
case TYPE_INT :
return 4 ;
case TYPE_LONGLONG :
case TYPE_ULONGLONG :
return 8 ;
case TYPE_LONG :
case TYPE_ULONG :
case TYPE_PTRVOID :
case TYPE_PTR :
if ( is_host ) {
return HOST_LONG_SIZE ;
} else {
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return TARGET_ABI_BITS / 8 ;
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}
break ;
case TYPE_ARRAY :
return thunk_type_align ( type_ptr + 2 , is_host );
case TYPE_STRUCT :
se = struct_entries + type_ptr [ 1 ];
return se -> align [ is_host ];
default :
return - 1 ;
}
}
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# endif /* NO_THUNK_TYPE_SIZE */
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unsigned int target_to_host_bitmask ( unsigned int x86_mask ,
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bitmask_transtbl * trans_tbl );
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unsigned int host_to_target_bitmask ( unsigned int alpha_mask ,
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bitmask_transtbl * trans_tbl );
# endif