1 /* -----------------------------------------------------------------*-C-*-
2 libffi @VERSION@ - Copyright (c) 1996-2003, 2007, 2008 Red Hat, Inc.
4 Permission is hereby granted, free of charge, to any person obtaining
5 a copy of this software and associated documentation files (the
6 ``Software''), to deal in the Software without restriction, including
7 without limitation the rights to use, copy, modify, merge, publish,
8 distribute, sublicense, and/or sell copies of the Software, and to
9 permit persons to whom the Software is furnished to do so, subject to
10 the following conditions:
12 The above copyright notice and this permission notice shall be included
13 in all copies or substantial portions of the Software.
15 THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
16 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
19 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 DEALINGS IN THE SOFTWARE.
24 ----------------------------------------------------------------------- */
26 /* -------------------------------------------------------------------
27 The basic API is described in the README file.
29 The raw API is designed to bypass some of the argument packing
30 and unpacking on architectures for which it can be avoided.
32 The closure API allows interpreted functions to be packaged up
33 inside a C function pointer, so that they can be called as C functions,
34 with no understanding on the client side that they are interpreted.
35 It can also be used in other cases in which it is necessary to package
36 up a user specified parameter and a function pointer as a single
39 The closure API must be implemented in order to get its functionality,
40 e.g. for use by gij. Routines are provided to emulate the raw API
41 if the underlying platform doesn't allow faster implementation.
43 More details on the raw and cloure API can be found in:
45 http://gcc.gnu.org/ml/java/1999-q3/msg00138.html
49 http://gcc.gnu.org/ml/java/1999-q3/msg00174.html
50 -------------------------------------------------------------------- */
59 /* Specify which architecture libffi is configured for. */
64 /* ---- System configuration information --------------------------------- */
66 #include <ffitarget.h>
71 #define __attribute__(X)
77 /* LONG_LONG_MAX is not always defined (not if STRICT_ANSI, for example).
78 But we can find it either under the correct ANSI name, or under GNU
81 #define FFI_64_BIT_MAX 9223372036854775807
84 # define FFI_LONG_LONG_MAX LONG_LONG_MAX
87 # define FFI_LONG_LONG_MAX LLONG_MAX
90 # define FFI_LONG_LONG_MAX __LONG_LONG_MAX__
94 # if defined (__IBMC__) || defined (__IBMCPP__)
95 # define FFI_LONG_LONG_MAX LONGLONG_MAX
97 # endif /* __PPC64__ */
98 # undef FFI_64_BIT_MAX
99 # define FFI_64_BIT_MAX 9223372036854775807LL
104 /* The closure code assumes that this works on pointers, i.e. a size_t */
105 /* can hold a pointer. */
107 typedef struct _ffi_type
110 unsigned short alignment;
112 struct _ffi_type **elements;
115 #ifndef LIBFFI_HIDE_BASIC_TYPES
117 # define ffi_type_uchar ffi_type_uint8
118 # define ffi_type_schar ffi_type_sint8
120 #error "char size not supported"
123 #if SHRT_MAX == 32767
124 # define ffi_type_ushort ffi_type_uint16
125 # define ffi_type_sshort ffi_type_sint16
126 #elif SHRT_MAX == 2147483647
127 # define ffi_type_ushort ffi_type_uint32
128 # define ffi_type_sshort ffi_type_sint32
130 #error "short size not supported"
134 # define ffi_type_uint ffi_type_uint16
135 # define ffi_type_sint ffi_type_sint16
136 #elif INT_MAX == 2147483647
137 # define ffi_type_uint ffi_type_uint32
138 # define ffi_type_sint ffi_type_sint32
139 #elif INT_MAX == 9223372036854775807
140 # define ffi_type_uint ffi_type_uint64
141 # define ffi_type_sint ffi_type_sint64
143 #error "int size not supported"
146 #if LONG_MAX == 2147483647
147 # if FFI_LONG_LONG_MAX != FFI_64_BIT_MAX
148 #error "no 64-bit data type supported"
150 #elif LONG_MAX != FFI_64_BIT_MAX
151 #error "long size not supported"
154 #if LONG_MAX == 2147483647
155 # define ffi_type_ulong ffi_type_uint32
156 # define ffi_type_slong ffi_type_sint32
157 #elif LONG_MAX == FFI_64_BIT_MAX
158 # define ffi_type_ulong ffi_type_uint64
159 # define ffi_type_slong ffi_type_sint64
161 #error "long size not supported"
164 /* These are defined in types.c */
165 extern ffi_type ffi_type_void;
166 extern ffi_type ffi_type_uint8;
167 extern ffi_type ffi_type_sint8;
168 extern ffi_type ffi_type_uint16;
169 extern ffi_type ffi_type_sint16;
170 extern ffi_type ffi_type_uint32;
171 extern ffi_type ffi_type_sint32;
172 extern ffi_type ffi_type_uint64;
173 extern ffi_type ffi_type_sint64;
174 extern ffi_type ffi_type_float;
175 extern ffi_type ffi_type_double;
176 extern ffi_type ffi_type_pointer;
178 #if @HAVE_LONG_DOUBLE@
179 extern ffi_type ffi_type_longdouble;
181 #define ffi_type_longdouble ffi_type_double
183 #endif /* LIBFFI_HIDE_BASIC_TYPES */
191 typedef unsigned FFI_TYPE;
196 ffi_type **arg_types;
200 #ifdef FFI_EXTRA_CIF_FIELDS
201 FFI_EXTRA_CIF_FIELDS;
205 /* ---- Definitions for the raw API -------------------------------------- */
207 #ifndef FFI_SIZEOF_ARG
208 # if LONG_MAX == 2147483647
209 # define FFI_SIZEOF_ARG 4
210 # elif LONG_MAX == FFI_64_BIT_MAX
211 # define FFI_SIZEOF_ARG 8
215 #ifndef FFI_SIZEOF_JAVA_RAW
216 # define FFI_SIZEOF_JAVA_RAW FFI_SIZEOF_ARG
223 char data[FFI_SIZEOF_ARG];
227 #if FFI_SIZEOF_JAVA_RAW == 4 && FFI_SIZEOF_ARG == 8
228 /* This is a special case for mips64/n32 ABI (and perhaps others) where
229 sizeof(void *) is 4 and FFI_SIZEOF_ARG is 8. */
234 char data[FFI_SIZEOF_JAVA_RAW];
238 typedef ffi_raw ffi_java_raw;
242 void ffi_raw_call (ffi_cif *cif,
247 void ffi_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw);
248 void ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args);
249 size_t ffi_raw_size (ffi_cif *cif);
251 /* This is analogous to the raw API, except it uses Java parameter */
252 /* packing, even on 64-bit machines. I.e. on 64-bit machines */
253 /* longs and doubles are followed by an empty 64-bit word. */
255 void ffi_java_raw_call (ffi_cif *cif,
258 ffi_java_raw *avalue);
260 void ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_java_raw *raw);
261 void ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_java_raw *raw, void **args);
262 size_t ffi_java_raw_size (ffi_cif *cif);
264 /* ---- Definitions for closures ----------------------------------------- */
272 char tramp[FFI_TRAMPOLINE_SIZE];
274 void (*fun)(ffi_cif*,void*,void**,void*);
277 } ffi_closure __attribute__((aligned (8)));
282 void *ffi_closure_alloc (size_t size, void **code);
283 void ffi_closure_free (void *);
286 ffi_prep_closure (ffi_closure*,
288 void (*fun)(ffi_cif*,void*,void**,void*),
292 ffi_prep_closure_loc (ffi_closure*,
294 void (*fun)(ffi_cif*,void*,void**,void*),
299 char tramp[FFI_TRAMPOLINE_SIZE];
303 #if !FFI_NATIVE_RAW_API
305 /* if this is enabled, then a raw closure has the same layout
306 as a regular closure. We use this to install an intermediate
307 handler to do the transaltion, void** -> ffi_raw*. */
309 void (*translate_args)(ffi_cif*,void*,void**,void*);
314 void (*fun)(ffi_cif*,void*,ffi_raw*,void*);
320 char tramp[FFI_TRAMPOLINE_SIZE];
324 #if !FFI_NATIVE_RAW_API
326 /* if this is enabled, then a raw closure has the same layout
327 as a regular closure. We use this to install an intermediate
328 handler to do the transaltion, void** -> ffi_raw*. */
330 void (*translate_args)(ffi_cif*,void*,void**,void*);
335 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*);
338 } ffi_java_raw_closure;
341 ffi_prep_raw_closure (ffi_raw_closure*,
343 void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
347 ffi_prep_raw_closure_loc (ffi_raw_closure*,
349 void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
354 ffi_prep_java_raw_closure (ffi_java_raw_closure*,
356 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
360 ffi_prep_java_raw_closure_loc (ffi_java_raw_closure*,
362 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
366 #endif /* FFI_CLOSURES */
368 /* ---- Public interface definition -------------------------------------- */
370 ffi_status ffi_prep_cif(ffi_cif *cif,
376 void ffi_call(ffi_cif *cif,
381 /* Useful for eliminating compiler warnings */
382 #define FFI_FN(f) ((void (*)(void))f)
384 /* ---- Definitions shared with assembly code ---------------------------- */
388 /* If these change, update src/mips/ffitarget.h. */
389 #define FFI_TYPE_VOID 0
390 #define FFI_TYPE_INT 1
391 #define FFI_TYPE_FLOAT 2
392 #define FFI_TYPE_DOUBLE 3
393 #if @HAVE_LONG_DOUBLE@
394 #define FFI_TYPE_LONGDOUBLE 4
396 #define FFI_TYPE_LONGDOUBLE FFI_TYPE_DOUBLE
398 #define FFI_TYPE_UINT8 5
399 #define FFI_TYPE_SINT8 6
400 #define FFI_TYPE_UINT16 7
401 #define FFI_TYPE_SINT16 8
402 #define FFI_TYPE_UINT32 9
403 #define FFI_TYPE_SINT32 10
404 #define FFI_TYPE_UINT64 11
405 #define FFI_TYPE_SINT64 12
406 #define FFI_TYPE_STRUCT 13
407 #define FFI_TYPE_POINTER 14
409 /* This should always refer to the last type code (for sanity checks) */
410 #define FFI_TYPE_LAST FFI_TYPE_POINTER