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
|
/*
* Generic thunking code to convert data between host and target CPU
*
* Copyright (c) 2003 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef THUNK_H
#define THUNK_H
#include "cpu.h"
/* types enums definitions */
typedef enum argtype {
TYPE_NULL,
TYPE_CHAR,
TYPE_SHORT,
TYPE_INT,
TYPE_LONG,
TYPE_ULONG,
TYPE_PTRVOID, /* pointer on unknown data */
TYPE_LONGLONG,
TYPE_ULONGLONG,
TYPE_PTR,
TYPE_ARRAY,
TYPE_STRUCT,
TYPE_OLDDEVT,
} argtype;
#define MK_PTR(type) TYPE_PTR, type
#define MK_ARRAY(type, size) TYPE_ARRAY, size, type
#define MK_STRUCT(id) TYPE_STRUCT, id
#define THUNK_TARGET 0
#define THUNK_HOST 1
typedef struct {
/* standard struct handling */
const argtype *field_types;
int nb_fields;
int *field_offsets[2];
/* special handling */
void (*convert[2])(void *dst, const void *src);
int size[2];
int align[2];
const char *name;
} StructEntry;
/* Translation table for bitmasks... */
typedef struct bitmask_transtbl {
unsigned int target_mask;
unsigned int target_bits;
unsigned int host_mask;
unsigned int host_bits;
} bitmask_transtbl;
void thunk_register_struct(int id, const char *name, const argtype *types);
void thunk_register_struct_direct(int id, const char *name,
const StructEntry *se1);
const argtype *thunk_convert(void *dst, const void *src,
const argtype *type_ptr, int to_host);
extern StructEntry *struct_entries;
int thunk_type_size_array(const argtype *type_ptr, int is_host);
int thunk_type_align_array(const argtype *type_ptr, int is_host);
static inline int thunk_type_size(const argtype *type_ptr, int is_host)
{
int type, size;
const StructEntry *se;
type = *type_ptr;
switch(type) {
case TYPE_CHAR:
return 1;
case TYPE_SHORT:
return 2;
case TYPE_INT:
return 4;
case TYPE_LONGLONG:
case TYPE_ULONGLONG:
return 8;
case TYPE_LONG:
case TYPE_ULONG:
case TYPE_PTRVOID:
case TYPE_PTR:
if (is_host) {
return sizeof(void *);
} else {
return TARGET_ABI_BITS / 8;
}
break;
case TYPE_OLDDEVT:
if (is_host) {
#if defined(HOST_X86_64)
return 8;
#elif defined(HOST_ALPHA) || defined(HOST_IA64) || defined(HOST_MIPS) || \
defined(HOST_PARISC) || defined(HOST_SPARC64)
return 4;
#elif defined(HOST_PPC)
return sizeof(void *);
#else
return 2;
#endif
} else {
#if defined(TARGET_X86_64)
return 8;
#elif defined(TARGET_ALPHA) || defined(TARGET_IA64) || defined(TARGET_MIPS) || \
defined(TARGET_PARISC) || defined(TARGET_SPARC64)
return 4;
#elif defined(TARGET_PPC)
return TARGET_ABI_BITS / 8;
#else
return 2;
#endif
}
break;
case TYPE_ARRAY:
size = type_ptr[1];
return size * thunk_type_size_array(type_ptr + 2, is_host);
case TYPE_STRUCT:
se = struct_entries + type_ptr[1];
return se->size[is_host];
default:
return -1;
}
}
static inline int thunk_type_align(const argtype *type_ptr, int is_host)
{
int type;
const StructEntry *se;
type = *type_ptr;
switch(type) {
case TYPE_CHAR:
return 1;
case TYPE_SHORT:
if (is_host) {
return __alignof__(short);
} else {
return ABI_SHORT_ALIGNMENT;
}
case TYPE_INT:
if (is_host) {
return __alignof__(int);
} else {
return ABI_INT_ALIGNMENT;
}
case TYPE_LONGLONG:
case TYPE_ULONGLONG:
if (is_host) {
return __alignof__(long long);
} else {
return ABI_LLONG_ALIGNMENT;
}
case TYPE_LONG:
case TYPE_ULONG:
case TYPE_PTRVOID:
case TYPE_PTR:
if (is_host) {
return __alignof__(long);
} else {
return ABI_LONG_ALIGNMENT;
}
break;
case TYPE_OLDDEVT:
return thunk_type_size(type_ptr, is_host);
case TYPE_ARRAY:
return thunk_type_align_array(type_ptr + 2, is_host);
case TYPE_STRUCT:
se = struct_entries + type_ptr[1];
return se->align[is_host];
default:
return -1;
}
}
unsigned int target_to_host_bitmask(unsigned int target_mask,
const bitmask_transtbl * trans_tbl);
unsigned int host_to_target_bitmask(unsigned int host_mask,
const bitmask_transtbl * trans_tbl);
void thunk_init(unsigned int max_structs);
#endif
|
