thunk.h - third_party/qemu - Git at Google

 /*
  *  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
	/*
	* 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