1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
|
/* -----------------------------------------------------------------------
raw_api.c - Copyright (c) 1999, 2008 Red Hat, Inc.
Author: Kresten Krab Thorup <krab@gnu.org>
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
``Software''), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
----------------------------------------------------------------------- */
/* This file defines generic functions for use with the raw api. */
#include <ffi.h>
#include <ffi_common.h>
#if !FFI_NO_RAW_API
size_t
ffi_raw_size (ffi_cif *cif)
{
size_t result = 0;
int i;
ffi_type **at = cif->arg_types;
for (i = cif->nargs-1; i >= 0; i--, at++)
{
#if !FFI_NO_STRUCTS
if ((*at)->type == FFI_TYPE_STRUCT)
result += FFI_ALIGN (sizeof (void*), FFI_SIZEOF_ARG);
else
#endif
result += FFI_ALIGN ((*at)->size, FFI_SIZEOF_ARG);
}
return result;
}
void
ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args)
{
unsigned i;
ffi_type **tp = cif->arg_types;
#if WORDS_BIGENDIAN
for (i = 0; i < cif->nargs; i++, tp++, args++)
{
switch ((*tp)->type)
{
case FFI_TYPE_UINT8:
case FFI_TYPE_SINT8:
*args = (void*) ((char*)(raw++) + FFI_SIZEOF_ARG - 1);
break;
case FFI_TYPE_UINT16:
case FFI_TYPE_SINT16:
*args = (void*) ((char*)(raw++) + FFI_SIZEOF_ARG - 2);
break;
#if FFI_SIZEOF_ARG >= 4
case FFI_TYPE_UINT32:
case FFI_TYPE_SINT32:
*args = (void*) ((char*)(raw++) + FFI_SIZEOF_ARG - 4);
break;
#endif
#if !FFI_NO_STRUCTS
case FFI_TYPE_STRUCT:
*args = (raw++)->ptr;
break;
#endif
case FFI_TYPE_COMPLEX:
*args = (raw++)->ptr;
break;
case FFI_TYPE_POINTER:
*args = (void*) &(raw++)->ptr;
break;
default:
*args = raw;
raw += FFI_ALIGN ((*tp)->size, FFI_SIZEOF_ARG) / FFI_SIZEOF_ARG;
}
}
#else /* WORDS_BIGENDIAN */
#if !PDP
/* then assume little endian */
for (i = 0; i < cif->nargs; i++, tp++, args++)
{
#if !FFI_NO_STRUCTS
if ((*tp)->type == FFI_TYPE_STRUCT)
{
*args = (raw++)->ptr;
}
else
#endif
if ((*tp)->type == FFI_TYPE_COMPLEX)
{
*args = (raw++)->ptr;
}
else
{
*args = (void*) raw;
raw += FFI_ALIGN ((*tp)->size, sizeof (void*)) / sizeof (void*);
}
}
#else
#error "pdp endian not supported"
#endif /* ! PDP */
#endif /* WORDS_BIGENDIAN */
}
void
ffi_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw)
{
unsigned i;
ffi_type **tp = cif->arg_types;
for (i = 0; i < cif->nargs; i++, tp++, args++)
{
switch ((*tp)->type)
{
case FFI_TYPE_UINT8:
(raw++)->uint = *(UINT8*) (*args);
break;
case FFI_TYPE_SINT8:
(raw++)->sint = *(SINT8*) (*args);
break;
case FFI_TYPE_UINT16:
(raw++)->uint = *(UINT16*) (*args);
break;
case FFI_TYPE_SINT16:
(raw++)->sint = *(SINT16*) (*args);
break;
#if FFI_SIZEOF_ARG >= 4
case FFI_TYPE_UINT32:
(raw++)->uint = *(UINT32*) (*args);
break;
case FFI_TYPE_SINT32:
(raw++)->sint = *(SINT32*) (*args);
break;
#endif
#if !FFI_NO_STRUCTS
case FFI_TYPE_STRUCT:
(raw++)->ptr = *args;
break;
#endif
case FFI_TYPE_COMPLEX:
(raw++)->ptr = *args;
break;
case FFI_TYPE_POINTER:
(raw++)->ptr = **(void***) args;
break;
default:
memcpy ((void*) raw->data, (void*)*args, (*tp)->size);
raw += FFI_ALIGN ((*tp)->size, FFI_SIZEOF_ARG) / FFI_SIZEOF_ARG;
}
}
}
#if !FFI_NATIVE_RAW_API
/* This is a generic definition of ffi_raw_call, to be used if the
* native system does not provide a machine-specific implementation.
* Having this, allows code to be written for the raw API, without
* the need for system-specific code to handle input in that format;
* these following couple of functions will handle the translation forth
* and back automatically. */
void ffi_raw_call (ffi_cif *cif, void (*fn)(void), void *rvalue, ffi_raw *raw)
{
void **avalue = (void**) alloca (cif->nargs * sizeof (void*));
ffi_raw_to_ptrarray (cif, raw, avalue);
ffi_call (cif, fn, rvalue, avalue);
}
#if FFI_CLOSURES /* base system provides closures */
static void
ffi_translate_args (ffi_cif *cif, void *rvalue,
void **avalue, void *user_data)
{
ffi_raw *raw = (ffi_raw*)alloca (ffi_raw_size (cif));
ffi_raw_closure *cl = (ffi_raw_closure*)user_data;
ffi_ptrarray_to_raw (cif, avalue, raw);
(*cl->fun) (cif, rvalue, raw, cl->user_data);
}
ffi_status
ffi_prep_raw_closure_loc (ffi_raw_closure* cl,
ffi_cif *cif,
void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
void *user_data,
void *codeloc)
{
ffi_status status;
status = ffi_prep_closure_loc ((ffi_closure*) cl,
cif,
&ffi_translate_args,
codeloc,
codeloc);
if (status == FFI_OK)
{
cl->fun = fun;
cl->user_data = user_data;
}
return status;
}
#endif /* FFI_CLOSURES */
#endif /* !FFI_NATIVE_RAW_API */
#if FFI_CLOSURES
/* Again, here is the generic version of ffi_prep_raw_closure, which
* will install an intermediate "hub" for translation of arguments from
* the pointer-array format, to the raw format */
ffi_status
ffi_prep_raw_closure (ffi_raw_closure* cl,
ffi_cif *cif,
void (*fun)(ffi_cif*,void*,ffi_raw*,void*),
void *user_data)
{
return ffi_prep_raw_closure_loc (cl, cif, fun, user_data, cl);
}
#endif /* FFI_CLOSURES */
#endif /* !FFI_NO_RAW_API */
|
