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/*
* 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
*/
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#ifndef THUNK_H
#define THUNK_H
#include <inttypes.h>
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#include "config.h"
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#ifdef HAVE_BYTESWAP_H
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#include <byteswap.h>
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#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) \
({ \
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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) )); \
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})
#endif
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#ifdef WORDS_BIGENDIAN
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#define BSWAP_NEEDED
#endif
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/* XXX: autoconf */
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#define TARGET_I386
#define TARGET_LONG_BITS 32
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#if defined(__alpha__) || defined (__ia64__)
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#define HOST_LONG_BITS 64
#else
#define HOST_LONG_BITS 32
#endif
#define TARGET_LONG_SIZE (TARGET_LONG_BITS / 8)
#define HOST_LONG_SIZE (TARGET_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);
}
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static inline void bswap16s(uint16_t *s)
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{
*s = bswap16(*s);
}
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static inline void bswap32s(uint32_t *s)
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{
*s = bswap32(*s);
}
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static inline void bswap64s(uint64_t *s)
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{
*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);
}
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static inline void tswap16s(uint16_t *s)
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{
*s = bswap16(*s);
}
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static inline void tswap32s(uint32_t *s)
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{
*s = bswap32(*s);
}
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static inline void tswap64s(uint64_t *s)
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{
*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;
}
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static inline void tswap16s(uint16_t *s)
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{
}
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static inline void tswap32s(uint32_t *s)
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{
}
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static inline void tswap64s(uint64_t *s)
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{
}
#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);
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
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