1
/* -----------------------------------------------------------------*-C-*-
2
libffi @VERSION@ - Copyright (c) 2011 Anthony Green
3
- Copyright (c) 1996-2003, 2007, 2008 Red Hat, Inc.
5
Permission is hereby granted, free of charge, to any person
6
obtaining a copy of this software and associated documentation
7
files (the ``Software''), to deal in the Software without
8
restriction, including without limitation the rights to use, copy,
9
modify, merge, publish, distribute, sublicense, and/or sell copies
10
of the Software, and to permit persons to whom the Software is
11
furnished to do so, subject to the following conditions:
13
The above copyright notice and this permission notice shall be
14
included in all copies or substantial portions of the Software.
16
THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
17
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
20
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23
DEALINGS IN THE SOFTWARE.
25
----------------------------------------------------------------------- */
27
/* -------------------------------------------------------------------
28
The basic API is described in the README file.
30
The raw API is designed to bypass some of the argument packing
31
and unpacking on architectures for which it can be avoided.
33
The closure API allows interpreted functions to be packaged up
34
inside a C function pointer, so that they can be called as C functions,
35
with no understanding on the client side that they are interpreted.
36
It can also be used in other cases in which it is necessary to package
37
up a user specified parameter and a function pointer as a single
40
The closure API must be implemented in order to get its functionality,
41
e.g. for use by gij. Routines are provided to emulate the raw API
42
if the underlying platform doesn't allow faster implementation.
44
More details on the raw and cloure API can be found in:
46
http://gcc.gnu.org/ml/java/1999-q3/msg00138.html
50
http://gcc.gnu.org/ml/java/1999-q3/msg00174.html
51
-------------------------------------------------------------------- */
60
/* Specify which architecture libffi is configured for. */
65
/* ---- System configuration information --------------------------------- */
67
#include <ffitarget.h>
72
#define __attribute__(X)
78
/* LONG_LONG_MAX is not always defined (not if STRICT_ANSI, for example).
79
But we can find it either under the correct ANSI name, or under GNU
82
#define FFI_64_BIT_MAX 9223372036854775807
85
# define FFI_LONG_LONG_MAX LONG_LONG_MAX
88
# define FFI_LONG_LONG_MAX LLONG_MAX
89
# ifdef _AIX52 /* or newer has C99 LLONG_MAX */
90
# undef FFI_64_BIT_MAX
91
# define FFI_64_BIT_MAX 9223372036854775807LL
92
# endif /* _AIX52 or newer */
95
# define FFI_LONG_LONG_MAX __LONG_LONG_MAX__
97
# ifdef _AIX /* AIX 5.1 and earlier have LONGLONG_MAX */
99
# if defined (__IBMC__) || defined (__IBMCPP__)
100
# define FFI_LONG_LONG_MAX LONGLONG_MAX
102
# endif /* __PPC64__ */
103
# undef FFI_64_BIT_MAX
104
# define FFI_64_BIT_MAX 9223372036854775807LL
109
/* The closure code assumes that this works on pointers, i.e. a size_t */
110
/* can hold a pointer. */
112
typedef struct _ffi_type
115
unsigned short alignment;
117
struct _ffi_type **elements;
120
#ifndef LIBFFI_HIDE_BASIC_TYPES
122
# define ffi_type_uchar ffi_type_uint8
123
# define ffi_type_schar ffi_type_sint8
125
#error "char size not supported"
128
#if SHRT_MAX == 32767
129
# define ffi_type_ushort ffi_type_uint16
130
# define ffi_type_sshort ffi_type_sint16
131
#elif SHRT_MAX == 2147483647
132
# define ffi_type_ushort ffi_type_uint32
133
# define ffi_type_sshort ffi_type_sint32
135
#error "short size not supported"
139
# define ffi_type_uint ffi_type_uint16
140
# define ffi_type_sint ffi_type_sint16
141
#elif INT_MAX == 2147483647
142
# define ffi_type_uint ffi_type_uint32
143
# define ffi_type_sint ffi_type_sint32
144
#elif INT_MAX == 9223372036854775807
145
# define ffi_type_uint ffi_type_uint64
146
# define ffi_type_sint ffi_type_sint64
148
#error "int size not supported"
151
#if LONG_MAX == 2147483647
152
# if FFI_LONG_LONG_MAX != FFI_64_BIT_MAX
153
#error "no 64-bit data type supported"
155
#elif LONG_MAX != FFI_64_BIT_MAX
156
#error "long size not supported"
159
#if LONG_MAX == 2147483647
160
# define ffi_type_ulong ffi_type_uint32
161
# define ffi_type_slong ffi_type_sint32
162
#elif LONG_MAX == FFI_64_BIT_MAX
163
# define ffi_type_ulong ffi_type_uint64
164
# define ffi_type_slong ffi_type_sint64
166
#error "long size not supported"
169
/* Need minimal decorations for DLLs to works on Windows. */
170
/* GCC has autoimport and autoexport. Rely on Libtool to */
171
/* help MSVC export from a DLL, but always declare data */
172
/* to be imported for MSVC clients. This costs an extra */
173
/* indirection for MSVC clients using the static version */
174
/* of the library, but don't worry about that. Besides, */
175
/* as a workaround, they can define FFI_BUILDING if they */
176
/* *know* they are going to link with the static library. */
177
#if defined _MSC_VER && !defined FFI_BUILDING
178
#define FFI_EXTERN extern __declspec(dllimport)
180
#define FFI_EXTERN extern
183
/* These are defined in types.c */
184
FFI_EXTERN ffi_type ffi_type_void;
185
FFI_EXTERN ffi_type ffi_type_uint8;
186
FFI_EXTERN ffi_type ffi_type_sint8;
187
FFI_EXTERN ffi_type ffi_type_uint16;
188
FFI_EXTERN ffi_type ffi_type_sint16;
189
FFI_EXTERN ffi_type ffi_type_uint32;
190
FFI_EXTERN ffi_type ffi_type_sint32;
191
FFI_EXTERN ffi_type ffi_type_uint64;
192
FFI_EXTERN ffi_type ffi_type_sint64;
193
FFI_EXTERN ffi_type ffi_type_float;
194
FFI_EXTERN ffi_type ffi_type_double;
195
FFI_EXTERN ffi_type ffi_type_pointer;
197
#if @HAVE_LONG_DOUBLE@
198
FFI_EXTERN ffi_type ffi_type_longdouble;
200
#define ffi_type_longdouble ffi_type_double
202
#endif /* LIBFFI_HIDE_BASIC_TYPES */
210
typedef unsigned FFI_TYPE;
215
ffi_type **arg_types;
219
#ifdef FFI_EXTRA_CIF_FIELDS
220
FFI_EXTRA_CIF_FIELDS;
224
/* Used internally, but overridden by some architectures */
225
ffi_status ffi_prep_cif_core(ffi_cif *cif,
227
unsigned int isvariadic,
228
unsigned int nfixedargs,
229
unsigned int ntotalargs,
233
/* ---- Definitions for the raw API -------------------------------------- */
235
#ifndef FFI_SIZEOF_ARG
236
# if LONG_MAX == 2147483647
237
# define FFI_SIZEOF_ARG 4
238
# elif LONG_MAX == FFI_64_BIT_MAX
239
# define FFI_SIZEOF_ARG 8
243
#ifndef FFI_SIZEOF_JAVA_RAW
244
# define FFI_SIZEOF_JAVA_RAW FFI_SIZEOF_ARG
251
char data[FFI_SIZEOF_ARG];
255
#if FFI_SIZEOF_JAVA_RAW == 4 && FFI_SIZEOF_ARG == 8
256
/* This is a special case for mips64/n32 ABI (and perhaps others) where
257
sizeof(void *) is 4 and FFI_SIZEOF_ARG is 8. */
262
char data[FFI_SIZEOF_JAVA_RAW];
266
typedef ffi_raw ffi_java_raw;
270
void ffi_raw_call (ffi_cif *cif,
275
void ffi_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw);
276
void ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args);
277
size_t ffi_raw_size (ffi_cif *cif);
279
/* This is analogous to the raw API, except it uses Java parameter */
280
/* packing, even on 64-bit machines. I.e. on 64-bit machines */
281
/* longs and doubles are followed by an empty 64-bit word. */
283
void ffi_java_raw_call (ffi_cif *cif,
286
ffi_java_raw *avalue);
288
void ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_java_raw *raw);
289
void ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_java_raw *raw, void **args);
290
size_t ffi_java_raw_size (ffi_cif *cif);
292
/* ---- Definitions for closures ----------------------------------------- */
300
#if @FFI_EXEC_TRAMPOLINE_TABLE@
301
void *trampoline_table;
302
void *trampoline_table_entry;
304
char tramp[FFI_TRAMPOLINE_SIZE];
307
void (*fun)(ffi_cif*,void*,void**,void*);
310
} ffi_closure __attribute__((aligned (8)));
318
void *ffi_closure_alloc (size_t size, void **code);
319
void ffi_closure_free (void *);
322
ffi_prep_closure (ffi_closure*,
324
void (*fun)(ffi_cif*,void*,void**,void*),
328
ffi_prep_closure_loc (ffi_closure*,
330
void (*fun)(ffi_cif*,void*,void**,void*),
338
#if @FFI_EXEC_TRAMPOLINE_TABLE@
339
void *trampoline_table;
340
void *trampoline_table_entry;
342
char tramp[FFI_TRAMPOLINE_SIZE];
346
#if !FFI_NATIVE_RAW_API
348
/* if this is enabled, then a raw closure has the same layout
349
as a regular closure. We use this to install an intermediate
350
handler to do the transaltion, void** -> ffi_raw*. */
352
void (*translate_args)(ffi_cif*,void*,void**,void*);
357
void (*fun)(ffi_cif*,void*,ffi_raw*,void*);
363
#if @FFI_EXEC_TRAMPOLINE_TABLE@
364
void *trampoline_table;
365
void *trampoline_table_entry;
367
char tramp[FFI_TRAMPOLINE_SIZE];
372
#if !FFI_NATIVE_RAW_API
374
/* if this is enabled, then a raw closure has the same layout
375
as a regular closure. We use this to install an intermediate
376
handler to do the transaltion, void** -> ffi_raw*. */
378
void (*translate_args)(ffi_cif*,void*,void**,void*);
383
void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*);
386
} ffi_java_raw_closure;
389
ffi_prep_raw_closure (ffi_raw_closure*,
391
void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
395
ffi_prep_raw_closure_loc (ffi_raw_closure*,
397
void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
402
ffi_prep_java_raw_closure (ffi_java_raw_closure*,
404
void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
408
ffi_prep_java_raw_closure_loc (ffi_java_raw_closure*,
410
void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
414
#endif /* FFI_CLOSURES */
416
/* ---- Public interface definition -------------------------------------- */
418
ffi_status ffi_prep_cif(ffi_cif *cif,
424
ffi_status ffi_prep_cif_var(ffi_cif *cif,
426
unsigned int nfixedargs,
427
unsigned int ntotalargs,
431
void ffi_call(ffi_cif *cif,
436
/* Useful for eliminating compiler warnings */
437
#define FFI_FN(f) ((void (*)(void))f)
439
/* ---- Definitions shared with assembly code ---------------------------- */
443
/* If these change, update src/mips/ffitarget.h. */
444
#define FFI_TYPE_VOID 0
445
#define FFI_TYPE_INT 1
446
#define FFI_TYPE_FLOAT 2
447
#define FFI_TYPE_DOUBLE 3
448
#if @HAVE_LONG_DOUBLE@
449
#define FFI_TYPE_LONGDOUBLE 4
451
#define FFI_TYPE_LONGDOUBLE FFI_TYPE_DOUBLE
453
#define FFI_TYPE_UINT8 5
454
#define FFI_TYPE_SINT8 6
455
#define FFI_TYPE_UINT16 7
456
#define FFI_TYPE_SINT16 8
457
#define FFI_TYPE_UINT32 9
458
#define FFI_TYPE_SINT32 10
459
#define FFI_TYPE_UINT64 11
460
#define FFI_TYPE_SINT64 12
461
#define FFI_TYPE_STRUCT 13
462
#define FFI_TYPE_POINTER 14
464
/* This should always refer to the last type code (for sanity checks) */
465
#define FFI_TYPE_LAST FFI_TYPE_POINTER