1 /* -----------------------------------------------------------------*-C-*-
2 libffi @VERSION@ - Copyright (c) 2011, 2014, 2019 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 Most of the API is documented in doc/libffi.texi.
30 The raw API is designed to bypass some of the argument packing and
31 unpacking on architectures for which it can be avoided. Routines
32 are provided to emulate the raw API if the underlying platform
33 doesn't allow faster implementation.
35 More details on the raw API can be found in:
37 http://gcc.gnu.org/ml/java/1999-q3/msg00138.html
41 http://gcc.gnu.org/ml/java/1999-q3/msg00174.html
42 -------------------------------------------------------------------- */
51 /* Specify which architecture libffi is configured for. */
56 /* ---- System configuration information --------------------------------- */
58 #include <ffitarget.h>
62 #if defined(_MSC_VER) && !defined(__clang__)
63 #define __attribute__(X)
69 /* LONG_LONG_MAX is not always defined (not if STRICT_ANSI, for example).
70 But we can find it either under the correct ANSI name, or under GNU
73 #define FFI_64_BIT_MAX 9223372036854775807
76 # define FFI_LONG_LONG_MAX LONG_LONG_MAX
79 # define FFI_LONG_LONG_MAX LLONG_MAX
80 # ifdef _AIX52 /* or newer has C99 LLONG_MAX */
81 # undef FFI_64_BIT_MAX
82 # define FFI_64_BIT_MAX 9223372036854775807LL
83 # endif /* _AIX52 or newer */
86 # define FFI_LONG_LONG_MAX __LONG_LONG_MAX__
88 # ifdef _AIX /* AIX 5.1 and earlier have LONGLONG_MAX */
90 # if defined (__IBMC__) || defined (__IBMCPP__)
91 # define FFI_LONG_LONG_MAX LONGLONG_MAX
93 # endif /* __PPC64__ */
94 # undef FFI_64_BIT_MAX
95 # define FFI_64_BIT_MAX 9223372036854775807LL
100 /* The closure code assumes that this works on pointers, i.e. a size_t
101 can hold a pointer. */
103 typedef struct _ffi_type
106 unsigned short alignment;
108 struct _ffi_type **elements;
111 /* Need minimal decorations for DLLs to work on Windows. GCC has
112 autoimport and autoexport. Always mark externally visible symbols
113 as dllimport for MSVC clients, even if it means an extra indirection
114 when using the static version of the library.
115 Besides, as a workaround, they can define FFI_BUILDING if they
116 *know* they are going to link with the static library. */
118 # if defined FFI_BUILDING_DLL /* Building libffi.DLL with msvcc.sh */
119 # define FFI_API __declspec(dllexport)
120 # elif !defined FFI_BUILDING /* Importing libffi.DLL */
121 # define FFI_API __declspec(dllimport)
122 # else /* Building/linking static library */
129 /* The externally visible type declarations also need the MSVC DLL
130 decorations, or they will not be exported from the object file. */
131 #if defined LIBFFI_HIDE_BASIC_TYPES
132 # define FFI_EXTERN FFI_API
134 # define FFI_EXTERN extern FFI_API
137 #ifndef LIBFFI_HIDE_BASIC_TYPES
139 # define ffi_type_uchar ffi_type_uint8
140 # define ffi_type_schar ffi_type_sint8
142 #error "char size not supported"
145 #if SHRT_MAX == 32767
146 # define ffi_type_ushort ffi_type_uint16
147 # define ffi_type_sshort ffi_type_sint16
148 #elif SHRT_MAX == 2147483647
149 # define ffi_type_ushort ffi_type_uint32
150 # define ffi_type_sshort ffi_type_sint32
152 #error "short size not supported"
156 # define ffi_type_uint ffi_type_uint16
157 # define ffi_type_sint ffi_type_sint16
158 #elif INT_MAX == 2147483647
159 # define ffi_type_uint ffi_type_uint32
160 # define ffi_type_sint ffi_type_sint32
161 #elif INT_MAX == 9223372036854775807
162 # define ffi_type_uint ffi_type_uint64
163 # define ffi_type_sint ffi_type_sint64
165 #error "int size not supported"
168 #if LONG_MAX == 2147483647
169 # if FFI_LONG_LONG_MAX != FFI_64_BIT_MAX
170 #error "no 64-bit data type supported"
172 #elif LONG_MAX != FFI_64_BIT_MAX
173 #error "long size not supported"
176 #if LONG_MAX == 2147483647
177 # define ffi_type_ulong ffi_type_uint32
178 # define ffi_type_slong ffi_type_sint32
179 #elif LONG_MAX == FFI_64_BIT_MAX
180 # define ffi_type_ulong ffi_type_uint64
181 # define ffi_type_slong ffi_type_sint64
183 #error "long size not supported"
186 /* These are defined in types.c. */
187 FFI_EXTERN ffi_type ffi_type_void;
188 FFI_EXTERN ffi_type ffi_type_uint8;
189 FFI_EXTERN ffi_type ffi_type_sint8;
190 FFI_EXTERN ffi_type ffi_type_uint16;
191 FFI_EXTERN ffi_type ffi_type_sint16;
192 FFI_EXTERN ffi_type ffi_type_uint32;
193 FFI_EXTERN ffi_type ffi_type_sint32;
194 FFI_EXTERN ffi_type ffi_type_uint64;
195 FFI_EXTERN ffi_type ffi_type_sint64;
196 FFI_EXTERN ffi_type ffi_type_float;
197 FFI_EXTERN ffi_type ffi_type_double;
198 FFI_EXTERN ffi_type ffi_type_pointer;
200 #if @HAVE_LONG_DOUBLE@
201 FFI_EXTERN ffi_type ffi_type_longdouble;
203 #define ffi_type_longdouble ffi_type_double
206 #ifdef FFI_TARGET_HAS_COMPLEX_TYPE
207 FFI_EXTERN ffi_type ffi_type_complex_float;
208 FFI_EXTERN ffi_type ffi_type_complex_double;
209 #if @HAVE_LONG_DOUBLE@
210 FFI_EXTERN ffi_type ffi_type_complex_longdouble;
212 #define ffi_type_complex_longdouble ffi_type_complex_double
215 #endif /* LIBFFI_HIDE_BASIC_TYPES */
226 ffi_type **arg_types;
230 #ifdef FFI_EXTRA_CIF_FIELDS
231 FFI_EXTRA_CIF_FIELDS;
235 /* ---- Definitions for the raw API -------------------------------------- */
237 #ifndef FFI_SIZEOF_ARG
238 # if LONG_MAX == 2147483647
239 # define FFI_SIZEOF_ARG 4
240 # elif LONG_MAX == FFI_64_BIT_MAX
241 # define FFI_SIZEOF_ARG 8
245 #ifndef FFI_SIZEOF_JAVA_RAW
246 # define FFI_SIZEOF_JAVA_RAW FFI_SIZEOF_ARG
253 char data[FFI_SIZEOF_ARG];
257 #if FFI_SIZEOF_JAVA_RAW == 4 && FFI_SIZEOF_ARG == 8
258 /* This is a special case for mips64/n32 ABI (and perhaps others) where
259 sizeof(void *) is 4 and FFI_SIZEOF_ARG is 8. */
264 char data[FFI_SIZEOF_JAVA_RAW];
268 typedef ffi_raw ffi_java_raw;
273 void ffi_raw_call (ffi_cif *cif,
278 FFI_API void ffi_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw);
279 FFI_API void ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args);
280 FFI_API size_t ffi_raw_size (ffi_cif *cif);
282 /* This is analogous to the raw API, except it uses Java parameter
283 packing, even on 64-bit machines. I.e. on 64-bit machines longs
284 and doubles are followed by an empty 64-bit word. */
286 #if !FFI_NATIVE_RAW_API
288 void ffi_java_raw_call (ffi_cif *cif,
291 ffi_java_raw *avalue) __attribute__((deprecated));
295 void ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_java_raw *raw) __attribute__((deprecated));
297 void ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_java_raw *raw, void **args) __attribute__((deprecated));
299 size_t ffi_java_raw_size (ffi_cif *cif) __attribute__((deprecated));
301 /* ---- Definitions for closures ----------------------------------------- */
309 #if @FFI_EXEC_TRAMPOLINE_TABLE@
310 void *trampoline_table;
311 void *trampoline_table_entry;
314 char tramp[FFI_TRAMPOLINE_SIZE];
319 void (*fun)(ffi_cif*,void*,void**,void*);
323 __attribute__((aligned (8)))
333 FFI_API void *ffi_closure_alloc (size_t size, void **code);
334 FFI_API void ffi_closure_free (void *);
336 #if defined(PA_LINUX) || defined(PA_HPUX)
337 #define FFI_CLOSURE_PTR(X) ((void *)((unsigned int)(X) | 2))
338 #define FFI_RESTORE_PTR(X) ((void *)((unsigned int)(X) & ~3))
340 #define FFI_CLOSURE_PTR(X) (X)
341 #define FFI_RESTORE_PTR(X) (X)
345 ffi_prep_closure (ffi_closure*,
347 void (*fun)(ffi_cif*,void*,void**,void*),
349 #if defined(__GNUC__) && (((__GNUC__ * 100) + __GNUC_MINOR__) >= 405)
350 __attribute__((deprecated ("use ffi_prep_closure_loc instead")))
351 #elif defined(__GNUC__) && __GNUC__ >= 3
352 __attribute__((deprecated))
357 ffi_prep_closure_loc (ffi_closure*,
359 void (*fun)(ffi_cif*,void*,void**,void*),
367 #if @FFI_EXEC_TRAMPOLINE_TABLE@
368 void *trampoline_table;
369 void *trampoline_table_entry;
371 char tramp[FFI_TRAMPOLINE_SIZE];
375 #if !FFI_NATIVE_RAW_API
377 /* If this is enabled, then a raw closure has the same layout
378 as a regular closure. We use this to install an intermediate
379 handler to do the transaltion, void** -> ffi_raw*. */
381 void (*translate_args)(ffi_cif*,void*,void**,void*);
386 void (*fun)(ffi_cif*,void*,ffi_raw*,void*);
392 #if @FFI_EXEC_TRAMPOLINE_TABLE@
393 void *trampoline_table;
394 void *trampoline_table_entry;
396 char tramp[FFI_TRAMPOLINE_SIZE];
401 #if !FFI_NATIVE_RAW_API
403 /* If this is enabled, then a raw closure has the same layout
404 as a regular closure. We use this to install an intermediate
405 handler to do the translation, void** -> ffi_raw*. */
407 void (*translate_args)(ffi_cif*,void*,void**,void*);
412 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*);
415 } ffi_java_raw_closure;
418 ffi_prep_raw_closure (ffi_raw_closure*,
420 void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
424 ffi_prep_raw_closure_loc (ffi_raw_closure*,
426 void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
430 #if !FFI_NATIVE_RAW_API
432 ffi_prep_java_raw_closure (ffi_java_raw_closure*,
434 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
435 void *user_data) __attribute__((deprecated));
438 ffi_prep_java_raw_closure_loc (ffi_java_raw_closure*,
440 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
442 void *codeloc) __attribute__((deprecated));
445 #endif /* FFI_CLOSURES */
452 void (*fun)(ffi_cif*,void*,void**,void*);
455 FFI_API ffi_status ffi_prep_go_closure (ffi_go_closure*, ffi_cif *,
456 void (*fun)(ffi_cif*,void*,void**,void*));
458 FFI_API void ffi_call_go (ffi_cif *cif, void (*fn)(void), void *rvalue,
459 void **avalue, void *closure);
461 #endif /* FFI_GO_CLOSURES */
463 /* ---- Public interface definition -------------------------------------- */
466 ffi_status ffi_prep_cif(ffi_cif *cif,
473 ffi_status ffi_prep_cif_var(ffi_cif *cif,
475 unsigned int nfixedargs,
476 unsigned int ntotalargs,
481 void ffi_call(ffi_cif *cif,
487 ffi_status ffi_get_struct_offsets (ffi_abi abi, ffi_type *struct_type,
490 /* Useful for eliminating compiler warnings. */
491 #define FFI_FN(f) ((void (*)(void))f)
493 /* ---- Definitions shared with assembly code ---------------------------- */
497 /* If these change, update src/mips/ffitarget.h. */
498 #define FFI_TYPE_VOID 0
499 #define FFI_TYPE_INT 1
500 #define FFI_TYPE_FLOAT 2
501 #define FFI_TYPE_DOUBLE 3
502 #if @HAVE_LONG_DOUBLE@
503 #define FFI_TYPE_LONGDOUBLE 4
505 #define FFI_TYPE_LONGDOUBLE FFI_TYPE_DOUBLE
507 #define FFI_TYPE_UINT8 5
508 #define FFI_TYPE_SINT8 6
509 #define FFI_TYPE_UINT16 7
510 #define FFI_TYPE_SINT16 8
511 #define FFI_TYPE_UINT32 9
512 #define FFI_TYPE_SINT32 10
513 #define FFI_TYPE_UINT64 11
514 #define FFI_TYPE_SINT64 12
515 #define FFI_TYPE_STRUCT 13
516 #define FFI_TYPE_POINTER 14
517 #define FFI_TYPE_COMPLEX 15
519 /* This should always refer to the last type code (for sanity checks). */
520 #define FFI_TYPE_LAST FFI_TYPE_COMPLEX