405 lines
11 KiB
C
405 lines
11 KiB
C
/* -----------------------------------------------------------------*-C-*-
|
|
libffi @VERSION@ - Copyright (c) 1996-2003, 2007, 2008 Red Hat, Inc.
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining
|
|
a copy of this software and associated documentation files (the
|
|
``Software''), to deal in the Software without restriction, including
|
|
without limitation the rights to use, copy, modify, merge, publish,
|
|
distribute, sublicense, and/or sell copies of the Software, and to
|
|
permit persons to whom the Software is furnished to do so, subject to
|
|
the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included
|
|
in all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
|
|
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
|
|
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
|
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
DEALINGS IN THE SOFTWARE.
|
|
|
|
----------------------------------------------------------------------- */
|
|
|
|
/* -------------------------------------------------------------------
|
|
The basic API is described in the README file.
|
|
|
|
The raw API is designed to bypass some of the argument packing
|
|
and unpacking on architectures for which it can be avoided.
|
|
|
|
The closure API allows interpreted functions to be packaged up
|
|
inside a C function pointer, so that they can be called as C functions,
|
|
with no understanding on the client side that they are interpreted.
|
|
It can also be used in other cases in which it is necessary to package
|
|
up a user specified parameter and a function pointer as a single
|
|
function pointer.
|
|
|
|
The closure API must be implemented in order to get its functionality,
|
|
e.g. for use by gij. Routines are provided to emulate the raw API
|
|
if the underlying platform doesn't allow faster implementation.
|
|
|
|
More details on the raw and cloure API can be found in:
|
|
|
|
http://gcc.gnu.org/ml/java/1999-q3/msg00138.html
|
|
|
|
and
|
|
|
|
http://gcc.gnu.org/ml/java/1999-q3/msg00174.html
|
|
-------------------------------------------------------------------- */
|
|
|
|
#ifndef LIBFFI_H
|
|
#define LIBFFI_H
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* Specify which architecture libffi is configured for. */
|
|
#ifndef @TARGET@
|
|
#define @TARGET@
|
|
#endif
|
|
|
|
/* ---- System configuration information --------------------------------- */
|
|
|
|
#include <ffitarget.h>
|
|
|
|
#ifndef LIBFFI_ASM
|
|
|
|
#ifdef _MSC_VER
|
|
#define __attribute__(X)
|
|
#endif
|
|
|
|
#include <stddef.h>
|
|
#include <limits.h>
|
|
|
|
/* LONG_LONG_MAX is not always defined (not if STRICT_ANSI, for example).
|
|
But we can find it either under the correct ANSI name, or under GNU
|
|
C's internal name. */
|
|
#ifdef LONG_LONG_MAX
|
|
# define FFI_LONG_LONG_MAX LONG_LONG_MAX
|
|
#else
|
|
# ifdef LLONG_MAX
|
|
# define FFI_LONG_LONG_MAX LLONG_MAX
|
|
# else
|
|
# ifdef __GNUC__
|
|
# define FFI_LONG_LONG_MAX __LONG_LONG_MAX__
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
/* The closure code assumes that this works on pointers, i.e. a size_t */
|
|
/* can hold a pointer. */
|
|
|
|
typedef struct _ffi_type
|
|
{
|
|
size_t size;
|
|
unsigned short alignment;
|
|
unsigned short type;
|
|
struct _ffi_type **elements;
|
|
} ffi_type;
|
|
|
|
#ifndef LIBFFI_HIDE_BASIC_TYPES
|
|
#if SCHAR_MAX == 127
|
|
# define ffi_type_uchar ffi_type_uint8
|
|
# define ffi_type_schar ffi_type_sint8
|
|
#else
|
|
#error "char size not supported"
|
|
#endif
|
|
|
|
#if SHRT_MAX == 32767
|
|
# define ffi_type_ushort ffi_type_uint16
|
|
# define ffi_type_sshort ffi_type_sint16
|
|
#elif SHRT_MAX == 2147483647
|
|
# define ffi_type_ushort ffi_type_uint32
|
|
# define ffi_type_sshort ffi_type_sint32
|
|
#else
|
|
#error "short size not supported"
|
|
#endif
|
|
|
|
#if INT_MAX == 32767
|
|
# define ffi_type_uint ffi_type_uint16
|
|
# define ffi_type_sint ffi_type_sint16
|
|
#elif INT_MAX == 2147483647
|
|
# define ffi_type_uint ffi_type_uint32
|
|
# define ffi_type_sint ffi_type_sint32
|
|
#elif INT_MAX == 9223372036854775807
|
|
# define ffi_type_uint ffi_type_uint64
|
|
# define ffi_type_sint ffi_type_sint64
|
|
#else
|
|
#error "int size not supported"
|
|
#endif
|
|
|
|
#if LONG_MAX == 2147483647
|
|
# if FFI_LONG_LONG_MAX != 9223372036854775807
|
|
#error "no 64-bit data type supported"
|
|
# endif
|
|
#elif LONG_MAX != 9223372036854775807
|
|
#error "long size not supported"
|
|
#endif
|
|
|
|
#if LONG_MAX == 2147483647
|
|
# define ffi_type_ulong ffi_type_uint32
|
|
# define ffi_type_slong ffi_type_sint32
|
|
#elif LONG_MAX == 9223372036854775807
|
|
# define ffi_type_ulong ffi_type_uint64
|
|
# define ffi_type_slong ffi_type_sint64
|
|
#else
|
|
#error "long size not supported"
|
|
#endif
|
|
|
|
/* These are defined in types.c */
|
|
extern ffi_type ffi_type_void;
|
|
extern ffi_type ffi_type_uint8;
|
|
extern ffi_type ffi_type_sint8;
|
|
extern ffi_type ffi_type_uint16;
|
|
extern ffi_type ffi_type_sint16;
|
|
extern ffi_type ffi_type_uint32;
|
|
extern ffi_type ffi_type_sint32;
|
|
extern ffi_type ffi_type_uint64;
|
|
extern ffi_type ffi_type_sint64;
|
|
extern ffi_type ffi_type_float;
|
|
extern ffi_type ffi_type_double;
|
|
extern ffi_type ffi_type_pointer;
|
|
|
|
#if @HAVE_LONG_DOUBLE@
|
|
extern ffi_type ffi_type_longdouble;
|
|
#else
|
|
#define ffi_type_longdouble ffi_type_double
|
|
#endif
|
|
#endif /* LIBFFI_HIDE_BASIC_TYPES */
|
|
|
|
typedef enum {
|
|
FFI_OK = 0,
|
|
FFI_BAD_TYPEDEF,
|
|
FFI_BAD_ABI
|
|
} ffi_status;
|
|
|
|
typedef unsigned FFI_TYPE;
|
|
|
|
typedef struct {
|
|
ffi_abi abi;
|
|
unsigned nargs;
|
|
ffi_type **arg_types;
|
|
ffi_type *rtype;
|
|
unsigned bytes;
|
|
unsigned flags;
|
|
#ifdef FFI_EXTRA_CIF_FIELDS
|
|
FFI_EXTRA_CIF_FIELDS;
|
|
#endif
|
|
} ffi_cif;
|
|
|
|
/* ---- Definitions for the raw API -------------------------------------- */
|
|
|
|
#ifndef FFI_SIZEOF_ARG
|
|
# if LONG_MAX == 2147483647
|
|
# define FFI_SIZEOF_ARG 4
|
|
# elif LONG_MAX == 9223372036854775807
|
|
# define FFI_SIZEOF_ARG 8
|
|
# endif
|
|
#endif
|
|
|
|
#ifndef FFI_SIZEOF_JAVA_RAW
|
|
# define FFI_SIZEOF_JAVA_RAW FFI_SIZEOF_ARG
|
|
#endif
|
|
|
|
typedef union {
|
|
ffi_sarg sint;
|
|
ffi_arg uint;
|
|
float flt;
|
|
char data[FFI_SIZEOF_ARG];
|
|
void* ptr;
|
|
} ffi_raw;
|
|
|
|
#if FFI_SIZEOF_JAVA_RAW == 4 && FFI_SIZEOF_ARG == 8
|
|
/* This is a special case for mips64/n32 ABI (and perhaps others) where
|
|
sizeof(void *) is 4 and FFI_SIZEOF_ARG is 8. */
|
|
typedef union {
|
|
signed int sint;
|
|
unsigned int uint;
|
|
float flt;
|
|
char data[FFI_SIZEOF_JAVA_RAW];
|
|
void* ptr;
|
|
} ffi_java_raw;
|
|
#else
|
|
typedef ffi_raw ffi_java_raw;
|
|
#endif
|
|
|
|
|
|
void ffi_raw_call (ffi_cif *cif,
|
|
void (*fn)(void),
|
|
void *rvalue,
|
|
ffi_raw *avalue);
|
|
|
|
void ffi_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw);
|
|
void ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args);
|
|
size_t ffi_raw_size (ffi_cif *cif);
|
|
|
|
/* This is analogous to the raw API, except it uses Java parameter */
|
|
/* packing, even on 64-bit machines. I.e. on 64-bit machines */
|
|
/* longs and doubles are followed by an empty 64-bit word. */
|
|
|
|
void ffi_java_raw_call (ffi_cif *cif,
|
|
void (*fn)(void),
|
|
void *rvalue,
|
|
ffi_java_raw *avalue);
|
|
|
|
void ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_java_raw *raw);
|
|
void ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_java_raw *raw, void **args);
|
|
size_t ffi_java_raw_size (ffi_cif *cif);
|
|
|
|
/* ---- Definitions for closures ----------------------------------------- */
|
|
|
|
#if FFI_CLOSURES
|
|
|
|
#ifdef _MSC_VER
|
|
__declspec(align(8))
|
|
#endif
|
|
typedef struct {
|
|
char tramp[FFI_TRAMPOLINE_SIZE];
|
|
ffi_cif *cif;
|
|
void (*fun)(ffi_cif*,void*,void**,void*);
|
|
void *user_data;
|
|
#ifdef __GNUC__
|
|
} ffi_closure __attribute__((aligned (8)));
|
|
#else
|
|
} ffi_closure;
|
|
#endif
|
|
|
|
void *ffi_closure_alloc (size_t size, void **code);
|
|
void ffi_closure_free (void *);
|
|
|
|
ffi_status
|
|
ffi_prep_closure (ffi_closure*,
|
|
ffi_cif *,
|
|
void (*fun)(ffi_cif*,void*,void**,void*),
|
|
void *user_data);
|
|
|
|
ffi_status
|
|
ffi_prep_closure_loc (ffi_closure*,
|
|
ffi_cif *,
|
|
void (*fun)(ffi_cif*,void*,void**,void*),
|
|
void *user_data,
|
|
void*codeloc);
|
|
|
|
typedef struct {
|
|
char tramp[FFI_TRAMPOLINE_SIZE];
|
|
|
|
ffi_cif *cif;
|
|
|
|
#if !FFI_NATIVE_RAW_API
|
|
|
|
/* if this is enabled, then a raw closure has the same layout
|
|
as a regular closure. We use this to install an intermediate
|
|
handler to do the transaltion, void** -> ffi_raw*. */
|
|
|
|
void (*translate_args)(ffi_cif*,void*,void**,void*);
|
|
void *this_closure;
|
|
|
|
#endif
|
|
|
|
void (*fun)(ffi_cif*,void*,ffi_raw*,void*);
|
|
void *user_data;
|
|
|
|
} ffi_raw_closure;
|
|
|
|
typedef struct {
|
|
char tramp[FFI_TRAMPOLINE_SIZE];
|
|
|
|
ffi_cif *cif;
|
|
|
|
#if !FFI_NATIVE_RAW_API
|
|
|
|
/* if this is enabled, then a raw closure has the same layout
|
|
as a regular closure. We use this to install an intermediate
|
|
handler to do the transaltion, void** -> ffi_raw*. */
|
|
|
|
void (*translate_args)(ffi_cif*,void*,void**,void*);
|
|
void *this_closure;
|
|
|
|
#endif
|
|
|
|
void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*);
|
|
void *user_data;
|
|
|
|
} ffi_java_raw_closure;
|
|
|
|
ffi_status
|
|
ffi_prep_raw_closure (ffi_raw_closure*,
|
|
ffi_cif *cif,
|
|
void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
|
|
void *user_data);
|
|
|
|
ffi_status
|
|
ffi_prep_raw_closure_loc (ffi_raw_closure*,
|
|
ffi_cif *cif,
|
|
void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
|
|
void *user_data,
|
|
void *codeloc);
|
|
|
|
ffi_status
|
|
ffi_prep_java_raw_closure (ffi_java_raw_closure*,
|
|
ffi_cif *cif,
|
|
void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
|
|
void *user_data);
|
|
|
|
ffi_status
|
|
ffi_prep_java_raw_closure_loc (ffi_java_raw_closure*,
|
|
ffi_cif *cif,
|
|
void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
|
|
void *user_data,
|
|
void *codeloc);
|
|
|
|
#endif /* FFI_CLOSURES */
|
|
|
|
/* ---- Public interface definition -------------------------------------- */
|
|
|
|
ffi_status ffi_prep_cif(ffi_cif *cif,
|
|
ffi_abi abi,
|
|
unsigned int nargs,
|
|
ffi_type *rtype,
|
|
ffi_type **atypes);
|
|
|
|
void ffi_call(ffi_cif *cif,
|
|
void (*fn)(void),
|
|
void *rvalue,
|
|
void **avalue);
|
|
|
|
/* Useful for eliminating compiler warnings */
|
|
#define FFI_FN(f) ((void (*)(void))f)
|
|
|
|
/* ---- Definitions shared with assembly code ---------------------------- */
|
|
|
|
#endif
|
|
|
|
/* If these change, update src/mips/ffitarget.h. */
|
|
#define FFI_TYPE_VOID 0
|
|
#define FFI_TYPE_INT 1
|
|
#define FFI_TYPE_FLOAT 2
|
|
#define FFI_TYPE_DOUBLE 3
|
|
#if @HAVE_LONG_DOUBLE@
|
|
#define FFI_TYPE_LONGDOUBLE 4
|
|
#else
|
|
#define FFI_TYPE_LONGDOUBLE FFI_TYPE_DOUBLE
|
|
#endif
|
|
#define FFI_TYPE_UINT8 5
|
|
#define FFI_TYPE_SINT8 6
|
|
#define FFI_TYPE_UINT16 7
|
|
#define FFI_TYPE_SINT16 8
|
|
#define FFI_TYPE_UINT32 9
|
|
#define FFI_TYPE_SINT32 10
|
|
#define FFI_TYPE_UINT64 11
|
|
#define FFI_TYPE_SINT64 12
|
|
#define FFI_TYPE_STRUCT 13
|
|
#define FFI_TYPE_POINTER 14
|
|
|
|
/* This should always refer to the last type code (for sanity checks) */
|
|
#define FFI_TYPE_LAST FFI_TYPE_POINTER
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|