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. */
75 /* ---- System configuration information --------------------------------- */
77 #include <ffitarget.h>
82 #define __attribute__(X)
88 /* LONG_LONG_MAX is not always defined (not if STRICT_ANSI, for example).
89 But we can find it either under the correct ANSI name, or under GNU
92 #define FFI_64_BIT_MAX 9223372036854775807
95 # define FFI_LONG_LONG_MAX LONG_LONG_MAX
98 # define FFI_LONG_LONG_MAX LLONG_MAX
99 # ifdef _AIX52 /* or newer has C99 LLONG_MAX */
100 # undef FFI_64_BIT_MAX
101 # define FFI_64_BIT_MAX 9223372036854775807LL
102 # endif /* _AIX52 or newer */
105 # define FFI_LONG_LONG_MAX __LONG_LONG_MAX__
107 # ifdef _AIX /* AIX 5.1 and earlier have LONGLONG_MAX */
109 # if defined (__IBMC__) || defined (__IBMCPP__)
110 # define FFI_LONG_LONG_MAX LONGLONG_MAX
112 # endif /* __PPC64__ */
113 # undef FFI_64_BIT_MAX
114 # define FFI_64_BIT_MAX 9223372036854775807LL
119 /* The closure code assumes that this works on pointers, i.e. a size_t */
120 /* can hold a pointer. */
122 typedef struct _ffi_type
125 unsigned short alignment;
127 struct _ffi_type **elements;
130 #ifndef LIBFFI_HIDE_BASIC_TYPES
132 # define ffi_type_uchar ffi_type_uint8
133 # define ffi_type_schar ffi_type_sint8
135 #error "char size not supported"
138 #if SHRT_MAX == 32767
139 # define ffi_type_ushort ffi_type_uint16
140 # define ffi_type_sshort ffi_type_sint16
141 #elif SHRT_MAX == 2147483647
142 # define ffi_type_ushort ffi_type_uint32
143 # define ffi_type_sshort ffi_type_sint32
145 #error "short size not supported"
149 # define ffi_type_uint ffi_type_uint16
150 # define ffi_type_sint ffi_type_sint16
151 #elif INT_MAX == 2147483647
152 # define ffi_type_uint ffi_type_uint32
153 # define ffi_type_sint ffi_type_sint32
154 #elif INT_MAX == 9223372036854775807
155 # define ffi_type_uint ffi_type_uint64
156 # define ffi_type_sint ffi_type_sint64
158 #error "int size not supported"
161 #if LONG_MAX == 2147483647
162 # if FFI_LONG_LONG_MAX != FFI_64_BIT_MAX
163 #error "no 64-bit data type supported"
165 #elif LONG_MAX != FFI_64_BIT_MAX
166 #error "long size not supported"
169 #if LONG_MAX == 2147483647
170 # define ffi_type_ulong ffi_type_uint32
171 # define ffi_type_slong ffi_type_sint32
172 #elif LONG_MAX == FFI_64_BIT_MAX
173 # define ffi_type_ulong ffi_type_uint64
174 # define ffi_type_slong ffi_type_sint64
176 #error "long size not supported"
179 /* Need minimal decorations for DLLs to works on Windows. */
180 /* GCC has autoimport and autoexport. Rely on Libtool to */
181 /* help MSVC export from a DLL, but always declare data */
182 /* to be imported for MSVC clients. This costs an extra */
183 /* indirection for MSVC clients using the static version */
184 /* of the library, but don't worry about that. Besides, */
185 /* as a workaround, they can define FFI_BUILDING if they */
186 /* *know* they are going to link with the static library. */
187 #if defined _MSC_VER && !defined FFI_BUILDING
188 #define FFI_EXTERN extern __declspec(dllimport)
190 #define FFI_EXTERN extern
193 /* These are defined in types.c */
194 FFI_EXTERN ffi_type ffi_type_void;
195 FFI_EXTERN ffi_type ffi_type_uint8;
196 FFI_EXTERN ffi_type ffi_type_sint8;
197 FFI_EXTERN ffi_type ffi_type_uint16;
198 FFI_EXTERN ffi_type ffi_type_sint16;
199 FFI_EXTERN ffi_type ffi_type_uint32;
200 FFI_EXTERN ffi_type ffi_type_sint32;
201 FFI_EXTERN ffi_type ffi_type_uint64;
202 FFI_EXTERN ffi_type ffi_type_sint64;
203 FFI_EXTERN ffi_type ffi_type_float;
204 FFI_EXTERN ffi_type ffi_type_double;
205 FFI_EXTERN ffi_type ffi_type_pointer;
208 FFI_EXTERN ffi_type ffi_type_longdouble;
210 #define ffi_type_longdouble ffi_type_double
212 #endif /* LIBFFI_HIDE_BASIC_TYPES */
220 typedef unsigned FFI_TYPE;
225 ffi_type **arg_types;
229 #ifdef FFI_EXTRA_CIF_FIELDS
230 FFI_EXTRA_CIF_FIELDS;
234 /* Used internally, but overridden by some architectures */
235 ffi_status ffi_prep_cif_core(ffi_cif *cif,
237 unsigned int isvariadic,
238 unsigned int nfixedargs,
239 unsigned int ntotalargs,
243 /* ---- Definitions for the raw API -------------------------------------- */
245 #ifndef FFI_SIZEOF_ARG
246 # if LONG_MAX == 2147483647
247 # define FFI_SIZEOF_ARG 4
248 # elif LONG_MAX == FFI_64_BIT_MAX
249 # define FFI_SIZEOF_ARG 8
253 #ifndef FFI_SIZEOF_JAVA_RAW
254 # define FFI_SIZEOF_JAVA_RAW FFI_SIZEOF_ARG
261 char data[FFI_SIZEOF_ARG];
265 #if FFI_SIZEOF_JAVA_RAW == 4 && FFI_SIZEOF_ARG == 8
266 /* This is a special case for mips64/n32 ABI (and perhaps others) where
267 sizeof(void *) is 4 and FFI_SIZEOF_ARG is 8. */
272 char data[FFI_SIZEOF_JAVA_RAW];
276 typedef ffi_raw ffi_java_raw;
280 void ffi_raw_call (ffi_cif *cif,
285 void ffi_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw);
286 void ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args);
287 size_t ffi_raw_size (ffi_cif *cif);
289 /* This is analogous to the raw API, except it uses Java parameter */
290 /* packing, even on 64-bit machines. I.e. on 64-bit machines */
291 /* longs and doubles are followed by an empty 64-bit word. */
293 void ffi_java_raw_call (ffi_cif *cif,
296 ffi_java_raw *avalue);
298 void ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_java_raw *raw);
299 void ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_java_raw *raw, void **args);
300 size_t ffi_java_raw_size (ffi_cif *cif);
302 /* ---- Definitions for closures ----------------------------------------- */
311 void *trampoline_table;
312 void *trampoline_table_entry;
314 char tramp[FFI_TRAMPOLINE_SIZE];
317 void (*fun)(ffi_cif*,void*,void**,void*);
320 } ffi_closure __attribute__((aligned (8)));
328 void *ffi_closure_alloc (size_t size, void **code);
329 void ffi_closure_free (void *);
332 ffi_prep_closure (ffi_closure*,
334 void (*fun)(ffi_cif*,void*,void**,void*),
338 ffi_prep_closure_loc (ffi_closure*,
340 void (*fun)(ffi_cif*,void*,void**,void*),
349 void *trampoline_table;
350 void *trampoline_table_entry;
352 char tramp[FFI_TRAMPOLINE_SIZE];
356 #if !FFI_NATIVE_RAW_API
358 /* if this is enabled, then a raw closure has the same layout
359 as a regular closure. We use this to install an intermediate
360 handler to do the transaltion, void** -> ffi_raw*. */
362 void (*translate_args)(ffi_cif*,void*,void**,void*);
367 void (*fun)(ffi_cif*,void*,ffi_raw*,void*);
374 void *trampoline_table;
375 void *trampoline_table_entry;
377 char tramp[FFI_TRAMPOLINE_SIZE];
382 #if !FFI_NATIVE_RAW_API
384 /* if this is enabled, then a raw closure has the same layout
385 as a regular closure. We use this to install an intermediate
386 handler to do the transaltion, void** -> ffi_raw*. */
388 void (*translate_args)(ffi_cif*,void*,void**,void*);
393 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*);
396 } ffi_java_raw_closure;
399 ffi_prep_raw_closure (ffi_raw_closure*,
401 void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
405 ffi_prep_raw_closure_loc (ffi_raw_closure*,
407 void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
412 ffi_prep_java_raw_closure (ffi_java_raw_closure*,
414 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
418 ffi_prep_java_raw_closure_loc (ffi_java_raw_closure*,
420 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
424 #endif /* FFI_CLOSURES */
426 /* ---- Public interface definition -------------------------------------- */
428 ffi_status ffi_prep_cif(ffi_cif *cif,
434 ffi_status ffi_prep_cif_var(ffi_cif *cif,
436 unsigned int nfixedargs,
437 unsigned int ntotalargs,
441 void ffi_call(ffi_cif *cif,
446 /* Useful for eliminating compiler warnings */
447 #define FFI_FN(f) ((void (*)(void))f)
449 /* ---- Definitions shared with assembly code ---------------------------- */
453 /* If these change, update src/mips/ffitarget.h. */
454 #define FFI_TYPE_VOID 0
455 #define FFI_TYPE_INT 1
456 #define FFI_TYPE_FLOAT 2
457 #define FFI_TYPE_DOUBLE 3
459 #define FFI_TYPE_LONGDOUBLE 4
461 #define FFI_TYPE_LONGDOUBLE FFI_TYPE_DOUBLE
463 #define FFI_TYPE_UINT8 5
464 #define FFI_TYPE_SINT8 6
465 #define FFI_TYPE_UINT16 7
466 #define FFI_TYPE_SINT16 8
467 #define FFI_TYPE_UINT32 9
468 #define FFI_TYPE_SINT32 10
469 #define FFI_TYPE_UINT64 11
470 #define FFI_TYPE_SINT64 12
471 #define FFI_TYPE_STRUCT 13
472 #define FFI_TYPE_POINTER 14
474 /* This should always refer to the last type code (for sanity checks) */
475 #define FFI_TYPE_LAST FFI_TYPE_POINTER