1 /* -----------------------------------------------------------------------
2 ffi.c - Copyright (c) 2004 Renesas Technology
4 M32R Foreign Function Interface
6 Permission is hereby granted, free of charge, to any person obtaining
7 a copy of this software and associated documentation files (the
8 ``Software''), to deal in the Software without restriction, including
9 without limitation the rights to use, copy, modify, merge, publish,
10 distribute, sublicense, and/or sell copies of the Software, and to
11 permit persons to whom the Software is furnished to do so, subject to
12 the following conditions:
14 The above copyright notice and this permission notice shall be included
15 in all copies or substantial portions of the Software.
17 THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 IN NO EVENT SHALL RENESAS TECHNOLOGY BE LIABLE FOR ANY CLAIM, DAMAGES OR
21 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23 OTHER DEALINGS IN THE SOFTWARE.
24 ----------------------------------------------------------------------- */
27 #include <ffi_common.h>
31 /* ffi_prep_args is called by the assembly routine once stack
32 space has been allocated for the function's arguments. */
34 void ffi_prep_args(char *stack, extended_cif *ecif)
46 if (ecif->cif->rtype->type == FFI_TYPE_STRUCT && ecif->cif->rtype->size > 8)
48 *(void **) argp = ecif->rvalue;
52 avn = ecif->cif->nargs;
53 p_argv = ecif->avalue;
55 for (i = ecif->cif->nargs, p_arg = ecif->cif->arg_types;
56 (i != 0) && (avn != 0);
61 /* Align if necessary. */
62 if (((*p_arg)->alignment - 1) & (unsigned) argp)
63 argp = (char *) ALIGN (argp, (*p_arg)->alignment);
73 switch ((*p_arg)->type)
76 *(signed int *) argp = (signed int)*(SINT8 *)(* p_argv);
80 *(unsigned int *) argp = (unsigned int)*(UINT8 *)(* p_argv);
84 *(signed int *) argp = (signed int)*(SINT16 *)(* p_argv);
88 *(unsigned int *) argp = (unsigned int)*(UINT16 *)(* p_argv);
93 if ((*p_arg)->alignment != 1)
94 memcpy (argp, *p_argv, z);
96 memcpy (argp + 4 - z, *p_argv, z);
104 else if (z == sizeof (int))
106 *(unsigned int *) argp = (unsigned int)*(UINT32 *)(* p_argv);
110 if ((*p_arg)->type == FFI_TYPE_STRUCT)
114 *(unsigned int *) argp = (unsigned int)(void *)(* p_argv);
119 memcpy(argp, *p_argv, z);
125 /* Double or long long 64bit. */
126 memcpy (argp, *p_argv, z);
137 /* Perform machine dependent cif processing. */
139 ffi_prep_cif_machdep(ffi_cif *cif)
141 /* Set the return type flag. */
142 switch (cif->rtype->type)
145 cif->flags = (unsigned) cif->rtype->type;
148 case FFI_TYPE_STRUCT:
149 if (cif->rtype->size <= 4)
150 cif->flags = FFI_TYPE_INT;
152 else if (cif->rtype->size <= 8)
153 cif->flags = FFI_TYPE_DOUBLE;
156 cif->flags = (unsigned) cif->rtype->type;
159 case FFI_TYPE_SINT64:
160 case FFI_TYPE_UINT64:
161 case FFI_TYPE_DOUBLE:
162 cif->flags = FFI_TYPE_DOUBLE;
167 cif->flags = FFI_TYPE_INT;
174 extern void ffi_call_SYSV(void (*)(char *, extended_cif *), extended_cif *,
175 unsigned, unsigned, unsigned *, void (*fn)());
177 void ffi_call(ffi_cif *cif, void (*fn)(), void *rvalue, void **avalue)
182 ecif.avalue = avalue;
184 /* If the return value is a struct and we don't have
185 a return value address then we need to make one. */
186 if ((rvalue == NULL) &&
187 (cif->rtype->type == FFI_TYPE_STRUCT))
189 ecif.rvalue = alloca (cif->rtype->size);
192 ecif.rvalue = rvalue;
197 ffi_call_SYSV(ffi_prep_args, &ecif, cif->bytes,
198 cif->flags, ecif.rvalue, fn);
199 if (cif->rtype->type == FFI_TYPE_STRUCT)
201 int size = cif->rtype->size;
202 int align = cif->rtype->alignment;
207 *(unsigned long *)(ecif.rvalue) <<= (4 - size) * 8;
209 else if (4 < size && size < 8)
213 memcpy (ecif.rvalue, ecif.rvalue + 8-size, size);
221 memcpy (ecif.rvalue, ecif.rvalue + 8-size, size);