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 #if HAVE_LONG_DOUBLE_VARIANT
225 /* Used to adjust size/alignment of ffi types. */
226 void ffi_prep_types (ffi_abi abi);
229 /* Used internally, but overridden by some architectures */
230 ffi_status ffi_prep_cif_core(ffi_cif *cif,
232 unsigned int isvariadic,
233 unsigned int nfixedargs,
234 unsigned int ntotalargs,
238 /* ---- Definitions for the raw API -------------------------------------- */
240 #ifndef FFI_SIZEOF_ARG
241 # if LONG_MAX == 2147483647
242 # define FFI_SIZEOF_ARG 4
243 # elif LONG_MAX == FFI_64_BIT_MAX
244 # define FFI_SIZEOF_ARG 8
248 #ifndef FFI_SIZEOF_JAVA_RAW
249 # define FFI_SIZEOF_JAVA_RAW FFI_SIZEOF_ARG
256 char data[FFI_SIZEOF_ARG];
260 #if FFI_SIZEOF_JAVA_RAW == 4 && FFI_SIZEOF_ARG == 8
261 /* This is a special case for mips64/n32 ABI (and perhaps others) where
262 sizeof(void *) is 4 and FFI_SIZEOF_ARG is 8. */
267 char data[FFI_SIZEOF_JAVA_RAW];
271 typedef ffi_raw ffi_java_raw;
275 void ffi_raw_call (ffi_cif *cif,
280 void ffi_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw);
281 void ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args);
282 size_t ffi_raw_size (ffi_cif *cif);
284 /* This is analogous to the raw API, except it uses Java parameter */
285 /* packing, even on 64-bit machines. I.e. on 64-bit machines */
286 /* longs and doubles are followed by an empty 64-bit word. */
288 void ffi_java_raw_call (ffi_cif *cif,
291 ffi_java_raw *avalue);
293 void ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_java_raw *raw);
294 void ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_java_raw *raw, void **args);
295 size_t ffi_java_raw_size (ffi_cif *cif);
297 /* ---- Definitions for closures ----------------------------------------- */
305 #if @FFI_EXEC_TRAMPOLINE_TABLE@
306 void *trampoline_table;
307 void *trampoline_table_entry;
309 char tramp[FFI_TRAMPOLINE_SIZE];
312 void (*fun)(ffi_cif*,void*,void**,void*);
315 } ffi_closure __attribute__((aligned (8)));
323 void *ffi_closure_alloc (size_t size, void **code);
324 void ffi_closure_free (void *);
327 ffi_prep_closure (ffi_closure*,
329 void (*fun)(ffi_cif*,void*,void**,void*),
333 ffi_prep_closure_loc (ffi_closure*,
335 void (*fun)(ffi_cif*,void*,void**,void*),
343 #if @FFI_EXEC_TRAMPOLINE_TABLE@
344 void *trampoline_table;
345 void *trampoline_table_entry;
347 char tramp[FFI_TRAMPOLINE_SIZE];
351 #if !FFI_NATIVE_RAW_API
353 /* if this is enabled, then a raw closure has the same layout
354 as a regular closure. We use this to install an intermediate
355 handler to do the transaltion, void** -> ffi_raw*. */
357 void (*translate_args)(ffi_cif*,void*,void**,void*);
362 void (*fun)(ffi_cif*,void*,ffi_raw*,void*);
368 #if @FFI_EXEC_TRAMPOLINE_TABLE@
369 void *trampoline_table;
370 void *trampoline_table_entry;
372 char tramp[FFI_TRAMPOLINE_SIZE];
377 #if !FFI_NATIVE_RAW_API
379 /* if this is enabled, then a raw closure has the same layout
380 as a regular closure. We use this to install an intermediate
381 handler to do the transaltion, void** -> ffi_raw*. */
383 void (*translate_args)(ffi_cif*,void*,void**,void*);
388 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*);
391 } ffi_java_raw_closure;
394 ffi_prep_raw_closure (ffi_raw_closure*,
396 void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
400 ffi_prep_raw_closure_loc (ffi_raw_closure*,
402 void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
407 ffi_prep_java_raw_closure (ffi_java_raw_closure*,
409 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
413 ffi_prep_java_raw_closure_loc (ffi_java_raw_closure*,
415 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
419 #endif /* FFI_CLOSURES */
421 /* ---- Public interface definition -------------------------------------- */
423 ffi_status ffi_prep_cif(ffi_cif *cif,
429 ffi_status ffi_prep_cif_var(ffi_cif *cif,
431 unsigned int nfixedargs,
432 unsigned int ntotalargs,
436 void ffi_call(ffi_cif *cif,
441 /* Useful for eliminating compiler warnings */
442 #define FFI_FN(f) ((void (*)(void))f)
444 /* ---- Definitions shared with assembly code ---------------------------- */
448 /* If these change, update src/mips/ffitarget.h. */
449 #define FFI_TYPE_VOID 0
450 #define FFI_TYPE_INT 1
451 #define FFI_TYPE_FLOAT 2
452 #define FFI_TYPE_DOUBLE 3
453 #if @HAVE_LONG_DOUBLE@
454 #define FFI_TYPE_LONGDOUBLE 4
456 #define FFI_TYPE_LONGDOUBLE FFI_TYPE_DOUBLE
458 #define FFI_TYPE_UINT8 5
459 #define FFI_TYPE_SINT8 6
460 #define FFI_TYPE_UINT16 7
461 #define FFI_TYPE_SINT16 8
462 #define FFI_TYPE_UINT32 9
463 #define FFI_TYPE_SINT32 10
464 #define FFI_TYPE_UINT64 11
465 #define FFI_TYPE_SINT64 12
466 #define FFI_TYPE_STRUCT 13
467 #define FFI_TYPE_POINTER 14
469 /* This should always refer to the last type code (for sanity checks) */
470 #define FFI_TYPE_LAST FFI_TYPE_POINTER