0ad041d476
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@284 c046a42c-6fe2-441c-8c8c-71466251a162
324 lines
7.1 KiB
C
324 lines
7.1 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, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#ifndef THUNK_H
|
|
#define THUNK_H
|
|
|
|
#include <inttypes.h>
|
|
#include "config.h"
|
|
|
|
#ifdef HAVE_BYTESWAP_H
|
|
#include <byteswap.h>
|
|
#else
|
|
|
|
#define bswap_16(x) \
|
|
({ \
|
|
uint16_t __x = (x); \
|
|
((uint16_t)( \
|
|
(((uint16_t)(__x) & (uint16_t)0x00ffU) << 8) | \
|
|
(((uint16_t)(__x) & (uint16_t)0xff00U) >> 8) )); \
|
|
})
|
|
|
|
#define bswap_32(x) \
|
|
({ \
|
|
uint32_t __x = (x); \
|
|
((uint32_t)( \
|
|
(((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
|
|
(((uint32_t)(__x) & (uint32_t)0x0000ff00UL) << 8) | \
|
|
(((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >> 8) | \
|
|
(((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) )); \
|
|
})
|
|
|
|
#define bswap_64(x) \
|
|
({ \
|
|
uint64_t __x = (x); \
|
|
((uint64_t)( \
|
|
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000000000ffULL) << 56) | \
|
|
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000000000ff00ULL) << 40) | \
|
|
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000000000ff0000ULL) << 24) | \
|
|
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00000000ff000000ULL) << 8) | \
|
|
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x000000ff00000000ULL) >> 8) | \
|
|
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
|
|
(uint64_t)(((uint64_t)(__x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
|
|
(uint64_t)(((uint64_t)(__x) & (uint64_t)0xff00000000000000ULL) >> 56) )); \
|
|
})
|
|
|
|
#endif
|
|
|
|
#if defined(WORDS_BIGENDIAN) != defined(TARGET_WORDS_BIGENDIAN)
|
|
#define BSWAP_NEEDED
|
|
#endif
|
|
|
|
/* XXX: autoconf */
|
|
#define TARGET_LONG_BITS 32
|
|
|
|
#if defined(__alpha__) || defined (__ia64__)
|
|
#define HOST_LONG_BITS 64
|
|
#else
|
|
#define HOST_LONG_BITS 32
|
|
#endif
|
|
|
|
#define TARGET_LONG_SIZE (TARGET_LONG_BITS / 8)
|
|
#define HOST_LONG_SIZE (HOST_LONG_BITS / 8)
|
|
|
|
static inline uint16_t bswap16(uint16_t x)
|
|
{
|
|
return bswap_16(x);
|
|
}
|
|
|
|
static inline uint32_t bswap32(uint32_t x)
|
|
{
|
|
return bswap_32(x);
|
|
}
|
|
|
|
static inline uint64_t bswap64(uint64_t x)
|
|
{
|
|
return bswap_64(x);
|
|
}
|
|
|
|
static inline void bswap16s(uint16_t *s)
|
|
{
|
|
*s = bswap16(*s);
|
|
}
|
|
|
|
static inline void bswap32s(uint32_t *s)
|
|
{
|
|
*s = bswap32(*s);
|
|
}
|
|
|
|
static inline void bswap64s(uint64_t *s)
|
|
{
|
|
*s = bswap64(*s);
|
|
}
|
|
|
|
#ifdef BSWAP_NEEDED
|
|
|
|
static inline uint16_t tswap16(uint16_t s)
|
|
{
|
|
return bswap16(s);
|
|
}
|
|
|
|
static inline uint32_t tswap32(uint32_t s)
|
|
{
|
|
return bswap32(s);
|
|
}
|
|
|
|
static inline uint64_t tswap64(uint64_t s)
|
|
{
|
|
return bswap64(s);
|
|
}
|
|
|
|
static inline void tswap16s(uint16_t *s)
|
|
{
|
|
*s = bswap16(*s);
|
|
}
|
|
|
|
static inline void tswap32s(uint32_t *s)
|
|
{
|
|
*s = bswap32(*s);
|
|
}
|
|
|
|
static inline void tswap64s(uint64_t *s)
|
|
{
|
|
*s = bswap64(*s);
|
|
}
|
|
|
|
#else
|
|
|
|
static inline uint16_t tswap16(uint16_t s)
|
|
{
|
|
return s;
|
|
}
|
|
|
|
static inline uint32_t tswap32(uint32_t s)
|
|
{
|
|
return s;
|
|
}
|
|
|
|
static inline uint64_t tswap64(uint64_t s)
|
|
{
|
|
return s;
|
|
}
|
|
|
|
static inline void tswap16s(uint16_t *s)
|
|
{
|
|
}
|
|
|
|
static inline void tswap32s(uint32_t *s)
|
|
{
|
|
}
|
|
|
|
static inline void tswap64s(uint64_t *s)
|
|
{
|
|
}
|
|
|
|
#endif
|
|
|
|
#if TARGET_LONG_SIZE == 4
|
|
#define tswapl(s) tswap32(s)
|
|
#define tswapls(s) tswap32s((uint32_t *)(s))
|
|
#else
|
|
#define tswapl(s) tswap64(s)
|
|
#define tswapls(s) tswap64s((uint64_t *)(s))
|
|
#endif
|
|
|
|
#if TARGET_LONG_SIZE == 4
|
|
typedef int32_t target_long;
|
|
typedef uint32_t target_ulong;
|
|
#elif TARGET_LONG_SIZE == 8
|
|
typedef int64_t target_long;
|
|
typedef uint64_t target_ulong;
|
|
#else
|
|
#error TARGET_LONG_SIZE undefined
|
|
#endif
|
|
|
|
/* 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);
|
|
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[];
|
|
|
|
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_LONG_SIZE;
|
|
}
|
|
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 {
|
|
return TARGET_LONG_SIZE;
|
|
}
|
|
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;
|
|
}
|
|
}
|
|
|
|
#endif /* NO_THUNK_TYPE_SIZE */
|
|
|
|
unsigned int target_to_host_bitmask(unsigned int x86_mask,
|
|
bitmask_transtbl * trans_tbl);
|
|
unsigned int host_to_target_bitmask(unsigned int alpha_mask,
|
|
bitmask_transtbl * trans_tbl);
|
|
|
|
#endif
|