162 lines
4.1 KiB
C
162 lines
4.1 KiB
C
/*
|
|
* Generic thunking code to convert data between host and target CPU
|
|
*
|
|
* 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#ifndef THUNK_H
|
|
#define THUNK_H
|
|
|
|
#include <inttypes.h>
|
|
#include "cpu.h"
|
|
|
|
/* 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,
|
|
const StructEntry *se1);
|
|
const argtype *thunk_convert(void *dst, const void *src,
|
|
const argtype *type_ptr, int to_host);
|
|
#ifndef NO_THUNK_TYPE_SIZE
|
|
|
|
extern StructEntry struct_entries[];
|
|
|
|
int thunk_type_size_array(const argtype *type_ptr, int is_host);
|
|
int thunk_type_align_array(const argtype *type_ptr, int is_host);
|
|
|
|
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 {
|
|
return TARGET_ABI_BITS / 8;
|
|
}
|
|
break;
|
|
case TYPE_ARRAY:
|
|
size = type_ptr[1];
|
|
return size * thunk_type_size_array(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 {
|
|
return TARGET_ABI_BITS / 8;
|
|
}
|
|
break;
|
|
case TYPE_ARRAY:
|
|
return thunk_type_align_array(type_ptr + 2, is_host);
|
|
case TYPE_STRUCT:
|
|
se = struct_entries + type_ptr[1];
|
|
return se->align[is_host];
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
#endif /* NO_THUNK_TYPE_SIZE */
|
|
|
|
unsigned int target_to_host_bitmask(unsigned int x86_mask,
|
|
const bitmask_transtbl * trans_tbl);
|
|
unsigned int host_to_target_bitmask(unsigned int alpha_mask,
|
|
const bitmask_transtbl * trans_tbl);
|
|
|
|
#endif
|