2 * Generic thunking code to convert data between host and target CPU
4 * Copyright (c) 2003 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
24 #include "exec/user/abitypes.h"
26 /* types enums definitions */
28 typedef enum argtype {
35 TYPE_PTRVOID, /* pointer on unknown data */
44 #define MK_PTR(type) TYPE_PTR, type
45 #define MK_ARRAY(type, size) TYPE_ARRAY, (int)(size), type
46 #define MK_STRUCT(id) TYPE_STRUCT, id
48 #define THUNK_TARGET 0
52 /* standard struct handling */
53 const argtype *field_types;
55 int *field_offsets[2];
56 /* special handling */
57 void (*convert[2])(void *dst, const void *src);
58 void (*print)(void *arg);
64 /* Translation table for bitmasks... */
65 typedef struct bitmask_transtbl {
66 unsigned int target_mask;
67 unsigned int target_bits;
68 unsigned int host_mask;
69 unsigned int host_bits;
72 void thunk_register_struct(int id, const char *name, const argtype *types);
73 void thunk_register_struct_direct(int id, const char *name,
74 const StructEntry *se1);
75 const argtype *thunk_convert(void *dst, const void *src,
76 const argtype *type_ptr, int to_host);
77 const argtype *thunk_print(void *arg, const argtype *type_ptr);
79 extern StructEntry *struct_entries;
81 int thunk_type_size_array(const argtype *type_ptr, int is_host);
82 int thunk_type_align_array(const argtype *type_ptr, int is_host);
84 static inline int thunk_type_size(const argtype *type_ptr, int is_host)
87 const StructEntry *se;
105 return sizeof(void *);
107 return TARGET_ABI_BITS / 8;
112 #if defined(HOST_X86_64)
114 #elif defined(HOST_ALPHA) || defined(HOST_IA64) || defined(HOST_MIPS) || \
115 defined(HOST_PARISC) || defined(HOST_SPARC64)
117 #elif defined(HOST_PPC)
118 return sizeof(void *);
123 #if defined(TARGET_X86_64)
125 #elif defined(TARGET_ALPHA) || defined(TARGET_IA64) || defined(TARGET_MIPS) || \
126 defined(TARGET_PARISC) || defined(TARGET_SPARC64)
128 #elif defined(TARGET_PPC)
129 return TARGET_ABI_BITS / 8;
137 return size * thunk_type_size_array(type_ptr + 2, is_host);
139 se = struct_entries + type_ptr[1];
140 return se->size[is_host];
142 g_assert_not_reached();
146 static inline int thunk_type_align(const argtype *type_ptr, int is_host)
149 const StructEntry *se;
157 return __alignof__(short);
159 return ABI_SHORT_ALIGNMENT;
163 return __alignof__(int);
165 return ABI_INT_ALIGNMENT;
170 return __alignof__(long long);
172 return ABI_LLONG_ALIGNMENT;
179 return __alignof__(long);
181 return ABI_LONG_ALIGNMENT;
185 return thunk_type_size(type_ptr, is_host);
187 return thunk_type_align_array(type_ptr + 2, is_host);
189 se = struct_entries + type_ptr[1];
190 return se->align[is_host];
192 g_assert_not_reached();
196 unsigned int target_to_host_bitmask(unsigned int target_mask,
197 const bitmask_transtbl * trans_tbl);
198 unsigned int host_to_target_bitmask(unsigned int host_mask,
199 const bitmask_transtbl * trans_tbl);
201 void thunk_init(unsigned int max_structs);