1 /* -----------------------------------------------------------------*-C-*-
2 libffi 3.0.11 - 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. */
61 #if defined(__MINGW32__)
62 #if defined(__x86_64__)
77 /* ---- System configuration information --------------------------------- */
79 #include <ffitarget.h>
84 #define __attribute__(X)
90 /* LONG_LONG_MAX is not always defined (not if STRICT_ANSI, for example).
91 But we can find it either under the correct ANSI name, or under GNU
94 #define FFI_64_BIT_MAX 9223372036854775807
97 # define FFI_LONG_LONG_MAX LONG_LONG_MAX
100 # define FFI_LONG_LONG_MAX LLONG_MAX
101 # ifdef _AIX52 /* or newer has C99 LLONG_MAX */
102 # undef FFI_64_BIT_MAX
103 # define FFI_64_BIT_MAX 9223372036854775807LL
104 # endif /* _AIX52 or newer */
107 # define FFI_LONG_LONG_MAX __LONG_LONG_MAX__
109 # ifdef _AIX /* AIX 5.1 and earlier have LONGLONG_MAX */
111 # if defined (__IBMC__) || defined (__IBMCPP__)
112 # define FFI_LONG_LONG_MAX LONGLONG_MAX
114 # endif /* __PPC64__ */
115 # undef FFI_64_BIT_MAX
116 # define FFI_64_BIT_MAX 9223372036854775807LL
121 /* The closure code assumes that this works on pointers, i.e. a size_t */
122 /* can hold a pointer. */
124 typedef struct _ffi_type
127 unsigned short alignment;
129 struct _ffi_type **elements;
132 #ifndef LIBFFI_HIDE_BASIC_TYPES
134 # define ffi_type_uchar ffi_type_uint8
135 # define ffi_type_schar ffi_type_sint8
137 #error "char size not supported"
140 #if SHRT_MAX == 32767
141 # define ffi_type_ushort ffi_type_uint16
142 # define ffi_type_sshort ffi_type_sint16
143 #elif SHRT_MAX == 2147483647
144 # define ffi_type_ushort ffi_type_uint32
145 # define ffi_type_sshort ffi_type_sint32
147 #error "short size not supported"
151 # define ffi_type_uint ffi_type_uint16
152 # define ffi_type_sint ffi_type_sint16
153 #elif INT_MAX == 2147483647
154 # define ffi_type_uint ffi_type_uint32
155 # define ffi_type_sint ffi_type_sint32
156 #elif INT_MAX == 9223372036854775807
157 # define ffi_type_uint ffi_type_uint64
158 # define ffi_type_sint ffi_type_sint64
160 #error "int size not supported"
163 #if LONG_MAX == 2147483647
164 # if FFI_LONG_LONG_MAX != FFI_64_BIT_MAX
165 #error "no 64-bit data type supported"
167 #elif LONG_MAX != FFI_64_BIT_MAX
168 #error "long size not supported"
171 #if LONG_MAX == 2147483647
172 # define ffi_type_ulong ffi_type_uint32
173 # define ffi_type_slong ffi_type_sint32
174 #elif LONG_MAX == FFI_64_BIT_MAX
175 # define ffi_type_ulong ffi_type_uint64
176 # define ffi_type_slong ffi_type_sint64
178 #error "long size not supported"
181 /* Need minimal decorations for DLLs to works on Windows. */
182 /* GCC has autoimport and autoexport. Rely on Libtool to */
183 /* help MSVC export from a DLL, but always declare data */
184 /* to be imported for MSVC clients. This costs an extra */
185 /* indirection for MSVC clients using the static version */
186 /* of the library, but don't worry about that. Besides, */
187 /* as a workaround, they can define FFI_BUILDING if they */
188 /* *know* they are going to link with the static library. */
189 #if defined _MSC_VER && !defined FFI_BUILDING
190 #define FFI_EXTERN extern __declspec(dllimport)
192 #define FFI_EXTERN extern
195 /* These are defined in types.c */
196 FFI_EXTERN ffi_type ffi_type_void;
197 FFI_EXTERN ffi_type ffi_type_uint8;
198 FFI_EXTERN ffi_type ffi_type_sint8;
199 FFI_EXTERN ffi_type ffi_type_uint16;
200 FFI_EXTERN ffi_type ffi_type_sint16;
201 FFI_EXTERN ffi_type ffi_type_uint32;
202 FFI_EXTERN ffi_type ffi_type_sint32;
203 FFI_EXTERN ffi_type ffi_type_uint64;
204 FFI_EXTERN ffi_type ffi_type_sint64;
205 FFI_EXTERN ffi_type ffi_type_float;
206 FFI_EXTERN ffi_type ffi_type_double;
207 FFI_EXTERN ffi_type ffi_type_pointer;
210 FFI_EXTERN ffi_type ffi_type_longdouble;
212 #define ffi_type_longdouble ffi_type_double
214 #endif /* LIBFFI_HIDE_BASIC_TYPES */
222 typedef unsigned FFI_TYPE;
227 ffi_type **arg_types;
231 #ifdef FFI_EXTRA_CIF_FIELDS
232 FFI_EXTRA_CIF_FIELDS;
236 /* Used internally, but overridden by some architectures */
237 ffi_status ffi_prep_cif_core(ffi_cif *cif,
239 unsigned int isvariadic,
240 unsigned int nfixedargs,
241 unsigned int ntotalargs,
245 /* ---- Definitions for the raw API -------------------------------------- */
247 #ifndef FFI_SIZEOF_ARG
248 # if LONG_MAX == 2147483647
249 # define FFI_SIZEOF_ARG 4
250 # elif LONG_MAX == FFI_64_BIT_MAX
251 # define FFI_SIZEOF_ARG 8
255 #ifndef FFI_SIZEOF_JAVA_RAW
256 # define FFI_SIZEOF_JAVA_RAW FFI_SIZEOF_ARG
263 char data[FFI_SIZEOF_ARG];
267 #if FFI_SIZEOF_JAVA_RAW == 4 && FFI_SIZEOF_ARG == 8
268 /* This is a special case for mips64/n32 ABI (and perhaps others) where
269 sizeof(void *) is 4 and FFI_SIZEOF_ARG is 8. */
274 char data[FFI_SIZEOF_JAVA_RAW];
278 typedef ffi_raw ffi_java_raw;
282 void ffi_raw_call (ffi_cif *cif,
287 void ffi_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw);
288 void ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args);
289 size_t ffi_raw_size (ffi_cif *cif);
291 /* This is analogous to the raw API, except it uses Java parameter */
292 /* packing, even on 64-bit machines. I.e. on 64-bit machines */
293 /* longs and doubles are followed by an empty 64-bit word. */
295 void ffi_java_raw_call (ffi_cif *cif,
298 ffi_java_raw *avalue);
300 void ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_java_raw *raw);
301 void ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_java_raw *raw, void **args);
302 size_t ffi_java_raw_size (ffi_cif *cif);
304 /* ---- Definitions for closures ----------------------------------------- */
313 void *trampoline_table;
314 void *trampoline_table_entry;
316 char tramp[FFI_TRAMPOLINE_SIZE];
319 void (*fun)(ffi_cif*,void*,void**,void*);
322 } ffi_closure __attribute__((aligned (8)));
330 void *ffi_closure_alloc (size_t size, void **code);
331 void ffi_closure_free (void *);
334 ffi_prep_closure (ffi_closure*,
336 void (*fun)(ffi_cif*,void*,void**,void*),
340 ffi_prep_closure_loc (ffi_closure*,
342 void (*fun)(ffi_cif*,void*,void**,void*),
351 void *trampoline_table;
352 void *trampoline_table_entry;
354 char tramp[FFI_TRAMPOLINE_SIZE];
358 #if !FFI_NATIVE_RAW_API
360 /* if this is enabled, then a raw closure has the same layout
361 as a regular closure. We use this to install an intermediate
362 handler to do the transaltion, void** -> ffi_raw*. */
364 void (*translate_args)(ffi_cif*,void*,void**,void*);
369 void (*fun)(ffi_cif*,void*,ffi_raw*,void*);
376 void *trampoline_table;
377 void *trampoline_table_entry;
379 char tramp[FFI_TRAMPOLINE_SIZE];
384 #if !FFI_NATIVE_RAW_API
386 /* if this is enabled, then a raw closure has the same layout
387 as a regular closure. We use this to install an intermediate
388 handler to do the transaltion, void** -> ffi_raw*. */
390 void (*translate_args)(ffi_cif*,void*,void**,void*);
395 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*);
398 } ffi_java_raw_closure;
401 ffi_prep_raw_closure (ffi_raw_closure*,
403 void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
407 ffi_prep_raw_closure_loc (ffi_raw_closure*,
409 void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
414 ffi_prep_java_raw_closure (ffi_java_raw_closure*,
416 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
420 ffi_prep_java_raw_closure_loc (ffi_java_raw_closure*,
422 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
426 #endif /* FFI_CLOSURES */
428 /* ---- Public interface definition -------------------------------------- */
430 ffi_status ffi_prep_cif(ffi_cif *cif,
436 ffi_status ffi_prep_cif_var(ffi_cif *cif,
438 unsigned int nfixedargs,
439 unsigned int ntotalargs,
443 void ffi_call(ffi_cif *cif,
448 /* Useful for eliminating compiler warnings */
449 #define FFI_FN(f) ((void (*)(void))f)
451 /* ---- Definitions shared with assembly code ---------------------------- */
455 /* If these change, update src/mips/ffitarget.h. */
456 #define FFI_TYPE_VOID 0
457 #define FFI_TYPE_INT 1
458 #define FFI_TYPE_FLOAT 2
459 #define FFI_TYPE_DOUBLE 3
461 #define FFI_TYPE_LONGDOUBLE 4
463 #define FFI_TYPE_LONGDOUBLE FFI_TYPE_DOUBLE
465 #define FFI_TYPE_UINT8 5
466 #define FFI_TYPE_SINT8 6
467 #define FFI_TYPE_UINT16 7
468 #define FFI_TYPE_SINT16 8
469 #define FFI_TYPE_UINT32 9
470 #define FFI_TYPE_SINT32 10
471 #define FFI_TYPE_UINT64 11
472 #define FFI_TYPE_SINT64 12
473 #define FFI_TYPE_STRUCT 13
474 #define FFI_TYPE_POINTER 14
476 /* This should always refer to the last type code (for sanity checks) */
477 #define FFI_TYPE_LAST FFI_TYPE_POINTER