1 /* -----------------------------------------------------------------------
2 java_raw_api.c - Copyright (c) 1999, 2007, 2008 Red Hat, Inc.
3
4 Cloned from raw_api.c
5
6 Raw_api.c author: Kresten Krab Thorup <krab@gnu.org>
7 Java_raw_api.c author: Hans-J. Boehm <hboehm@hpl.hp.com>
8
9 $Id $
10
11 Permission is hereby granted, free of charge, to any person obtaining
12 a copy of this software and associated documentation files (the
13 ``Software''), to deal in the Software without restriction, including
14 without limitation the rights to use, copy, modify, merge, publish,
15 distribute, sublicense, and/or sell copies of the Software, and to
16 permit persons to whom the Software is furnished to do so, subject to
17 the following conditions:
18
19 The above copyright notice and this permission notice shall be included
20 in all copies or substantial portions of the Software.
21
22 THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
23 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
26 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
27 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
28 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
29 DEALINGS IN THE SOFTWARE.
30 ----------------------------------------------------------------------- */
31
32 /* This defines a Java- and 64-bit specific variant of the raw API. */
33 /* It assumes that "raw" argument blocks look like Java stacks on a */
34 /* 64-bit machine. Arguments that can be stored in a single stack */
35 /* stack slots (longs, doubles) occupy 128 bits, but only the first */
36 /* 64 bits are actually used. */
37
38 #include <ffi.h>
39 #include <ffi_common.h>
40 #include <stdlib.h>
41
42 #if !defined(NO_JAVA_RAW_API)
43
44 size_t
ffi_java_raw_size(ffi_cif * cif)45 ffi_java_raw_size (ffi_cif *cif)
46 {
47 size_t result = 0;
48 int i;
49
50 ffi_type **at = cif->arg_types;
51
52 for (i = cif->nargs-1; i >= 0; i--, at++)
53 {
54 switch((*at) -> type) {
55 case FFI_TYPE_UINT64:
56 case FFI_TYPE_SINT64:
57 case FFI_TYPE_DOUBLE:
58 result += 2 * FFI_SIZEOF_JAVA_RAW;
59 break;
60 case FFI_TYPE_STRUCT:
61 /* No structure parameters in Java. */
62 abort();
63 case FFI_TYPE_COMPLEX:
64 /* Not supported yet. */
65 abort();
66 default:
67 result += FFI_SIZEOF_JAVA_RAW;
68 }
69 }
70
71 return result;
72 }
73
74
75 void
ffi_java_raw_to_ptrarray(ffi_cif * cif,ffi_java_raw * raw,void ** args)76 ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_java_raw *raw, void **args)
77 {
78 unsigned i;
79 ffi_type **tp = cif->arg_types;
80
81 #if WORDS_BIGENDIAN
82
83 for (i = 0; i < cif->nargs; i++, tp++, args++)
84 {
85 switch ((*tp)->type)
86 {
87 case FFI_TYPE_UINT8:
88 case FFI_TYPE_SINT8:
89 *args = (void*) ((char*)(raw++) + 3);
90 break;
91
92 case FFI_TYPE_UINT16:
93 case FFI_TYPE_SINT16:
94 *args = (void*) ((char*)(raw++) + 2);
95 break;
96
97 #if FFI_SIZEOF_JAVA_RAW == 8
98 case FFI_TYPE_UINT64:
99 case FFI_TYPE_SINT64:
100 case FFI_TYPE_DOUBLE:
101 *args = (void *)raw;
102 raw += 2;
103 break;
104 #endif
105
106 case FFI_TYPE_POINTER:
107 *args = (void*) &(raw++)->ptr;
108 break;
109
110 case FFI_TYPE_COMPLEX:
111 /* Not supported yet. */
112 abort();
113
114 default:
115 *args = raw;
116 raw +=
117 FFI_ALIGN ((*tp)->size, sizeof(ffi_java_raw)) / sizeof(ffi_java_raw);
118 }
119 }
120
121 #else /* WORDS_BIGENDIAN */
122
123 #if !PDP
124
125 /* then assume little endian */
126 for (i = 0; i < cif->nargs; i++, tp++, args++)
127 {
128 #if FFI_SIZEOF_JAVA_RAW == 8
129 switch((*tp)->type) {
130 case FFI_TYPE_UINT64:
131 case FFI_TYPE_SINT64:
132 case FFI_TYPE_DOUBLE:
133 *args = (void*) raw;
134 raw += 2;
135 break;
136 case FFI_TYPE_COMPLEX:
137 /* Not supported yet. */
138 abort();
139 default:
140 *args = (void*) raw++;
141 }
142 #else /* FFI_SIZEOF_JAVA_RAW != 8 */
143 *args = (void*) raw;
144 raw +=
145 FFI_ALIGN ((*tp)->size, sizeof(ffi_java_raw)) / sizeof(ffi_java_raw);
146 #endif /* FFI_SIZEOF_JAVA_RAW == 8 */
147 }
148
149 #else
150 #error "pdp endian not supported"
151 #endif /* ! PDP */
152
153 #endif /* WORDS_BIGENDIAN */
154 }
155
156 void
ffi_java_ptrarray_to_raw(ffi_cif * cif,void ** args,ffi_java_raw * raw)157 ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_java_raw *raw)
158 {
159 unsigned i;
160 ffi_type **tp = cif->arg_types;
161
162 for (i = 0; i < cif->nargs; i++, tp++, args++)
163 {
164 switch ((*tp)->type)
165 {
166 case FFI_TYPE_UINT8:
167 #if WORDS_BIGENDIAN
168 *(UINT32*)(raw++) = *(UINT8*) (*args);
169 #else
170 (raw++)->uint = *(UINT8*) (*args);
171 #endif
172 break;
173
174 case FFI_TYPE_SINT8:
175 #if WORDS_BIGENDIAN
176 *(SINT32*)(raw++) = *(SINT8*) (*args);
177 #else
178 (raw++)->sint = *(SINT8*) (*args);
179 #endif
180 break;
181
182 case FFI_TYPE_UINT16:
183 #if WORDS_BIGENDIAN
184 *(UINT32*)(raw++) = *(UINT16*) (*args);
185 #else
186 (raw++)->uint = *(UINT16*) (*args);
187 #endif
188 break;
189
190 case FFI_TYPE_SINT16:
191 #if WORDS_BIGENDIAN
192 *(SINT32*)(raw++) = *(SINT16*) (*args);
193 #else
194 (raw++)->sint = *(SINT16*) (*args);
195 #endif
196 break;
197
198 case FFI_TYPE_UINT32:
199 #if WORDS_BIGENDIAN
200 *(UINT32*)(raw++) = *(UINT32*) (*args);
201 #else
202 (raw++)->uint = *(UINT32*) (*args);
203 #endif
204 break;
205
206 case FFI_TYPE_SINT32:
207 #if WORDS_BIGENDIAN
208 *(SINT32*)(raw++) = *(SINT32*) (*args);
209 #else
210 (raw++)->sint = *(SINT32*) (*args);
211 #endif
212 break;
213
214 case FFI_TYPE_FLOAT:
215 (raw++)->flt = *(FLOAT32*) (*args);
216 break;
217
218 #if FFI_SIZEOF_JAVA_RAW == 8
219 case FFI_TYPE_UINT64:
220 case FFI_TYPE_SINT64:
221 case FFI_TYPE_DOUBLE:
222 raw->uint = *(UINT64*) (*args);
223 raw += 2;
224 break;
225 #endif
226
227 case FFI_TYPE_POINTER:
228 (raw++)->ptr = **(void***) args;
229 break;
230
231 default:
232 #if FFI_SIZEOF_JAVA_RAW == 8
233 FFI_ASSERT(0); /* Should have covered all cases */
234 #else
235 memcpy ((void*) raw->data, (void*)*args, (*tp)->size);
236 raw +=
237 FFI_ALIGN ((*tp)->size, sizeof(ffi_java_raw)) / sizeof(ffi_java_raw);
238 #endif
239 }
240 }
241 }
242
243 #if !FFI_NATIVE_RAW_API
244
245 static void
ffi_java_rvalue_to_raw(ffi_cif * cif,void * rvalue)246 ffi_java_rvalue_to_raw (ffi_cif *cif, void *rvalue)
247 {
248 #if WORDS_BIGENDIAN && FFI_SIZEOF_ARG == 8
249 switch (cif->rtype->type)
250 {
251 case FFI_TYPE_UINT8:
252 case FFI_TYPE_UINT16:
253 case FFI_TYPE_UINT32:
254 *(UINT64 *)rvalue <<= 32;
255 break;
256
257 case FFI_TYPE_SINT8:
258 case FFI_TYPE_SINT16:
259 case FFI_TYPE_SINT32:
260 case FFI_TYPE_INT:
261 #if FFI_SIZEOF_JAVA_RAW == 4
262 case FFI_TYPE_POINTER:
263 #endif
264 *(SINT64 *)rvalue <<= 32;
265 break;
266
267 case FFI_TYPE_COMPLEX:
268 /* Not supported yet. */
269 abort();
270
271 default:
272 break;
273 }
274 #endif
275 }
276
277 static void
ffi_java_raw_to_rvalue(ffi_cif * cif,void * rvalue)278 ffi_java_raw_to_rvalue (ffi_cif *cif, void *rvalue)
279 {
280 #if WORDS_BIGENDIAN && FFI_SIZEOF_ARG == 8
281 switch (cif->rtype->type)
282 {
283 case FFI_TYPE_UINT8:
284 case FFI_TYPE_UINT16:
285 case FFI_TYPE_UINT32:
286 *(UINT64 *)rvalue >>= 32;
287 break;
288
289 case FFI_TYPE_SINT8:
290 case FFI_TYPE_SINT16:
291 case FFI_TYPE_SINT32:
292 case FFI_TYPE_INT:
293 *(SINT64 *)rvalue >>= 32;
294 break;
295
296 case FFI_TYPE_COMPLEX:
297 /* Not supported yet. */
298 abort();
299
300 default:
301 break;
302 }
303 #endif
304 }
305
306 /* This is a generic definition of ffi_raw_call, to be used if the
307 * native system does not provide a machine-specific implementation.
308 * Having this, allows code to be written for the raw API, without
309 * the need for system-specific code to handle input in that format;
310 * these following couple of functions will handle the translation forth
311 * and back automatically. */
312
ffi_java_raw_call(ffi_cif * cif,void (* fn)(void),void * rvalue,ffi_java_raw * raw)313 void ffi_java_raw_call (ffi_cif *cif, void (*fn)(void), void *rvalue,
314 ffi_java_raw *raw)
315 {
316 void **avalue = (void**) alloca (cif->nargs * sizeof (void*));
317 ffi_java_raw_to_ptrarray (cif, raw, avalue);
318 ffi_call (cif, fn, rvalue, avalue);
319 ffi_java_rvalue_to_raw (cif, rvalue);
320 }
321
322 #if FFI_CLOSURES /* base system provides closures */
323
324 static void
ffi_java_translate_args(ffi_cif * cif,void * rvalue,void ** avalue,void * user_data)325 ffi_java_translate_args (ffi_cif *cif, void *rvalue,
326 void **avalue, void *user_data)
327 {
328 ffi_java_raw *raw = (ffi_java_raw*)alloca (ffi_java_raw_size (cif));
329 ffi_raw_closure *cl = (ffi_raw_closure*)user_data;
330
331 ffi_java_ptrarray_to_raw (cif, avalue, raw);
332 (*cl->fun) (cif, rvalue, (ffi_raw*)raw, cl->user_data);
333 ffi_java_raw_to_rvalue (cif, rvalue);
334 }
335
336 ffi_status
ffi_prep_java_raw_closure_loc(ffi_java_raw_closure * cl,ffi_cif * cif,void (* fun)(ffi_cif *,void *,ffi_java_raw *,void *),void * user_data,void * codeloc)337 ffi_prep_java_raw_closure_loc (ffi_java_raw_closure* cl,
338 ffi_cif *cif,
339 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
340 void *user_data,
341 void *codeloc)
342 {
343 ffi_status status;
344
345 status = ffi_prep_closure_loc ((ffi_closure*) cl,
346 cif,
347 &ffi_java_translate_args,
348 codeloc,
349 codeloc);
350 if (status == FFI_OK)
351 {
352 cl->fun = fun;
353 cl->user_data = user_data;
354 }
355
356 return status;
357 }
358
359 /* Again, here is the generic version of ffi_prep_raw_closure, which
360 * will install an intermediate "hub" for translation of arguments from
361 * the pointer-array format, to the raw format */
362
363 ffi_status
ffi_prep_java_raw_closure(ffi_java_raw_closure * cl,ffi_cif * cif,void (* fun)(ffi_cif *,void *,ffi_java_raw *,void *),void * user_data)364 ffi_prep_java_raw_closure (ffi_java_raw_closure* cl,
365 ffi_cif *cif,
366 void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*),
367 void *user_data)
368 {
369 return ffi_prep_java_raw_closure_loc (cl, cif, fun, user_data, cl);
370 }
371
372 #endif /* FFI_CLOSURES */
373 #endif /* !FFI_NATIVE_RAW_API */
374 #endif /* !NO_JAVA_RAW_API */
375