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/* -----------------------------------------------------------------------
   ffi.c - Copyright (c) 2004  Renesas Technology
 
   M32R Foreign Function Interface
 
   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 RENESAS TECHNOLOGY 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.
   ----------------------------------------------------------------------- */
 
#include <ffi.h>
#include <ffi_common.h>
 
#include <stdlib.h>
 
/* ffi_prep_args is called by the assembly routine once stack
   space has been allocated for the function's arguments.  */
 
/*@-exportheader@*/
void ffi_prep_args(char *stack, extended_cif *ecif)
/*@=exportheader@*/
{
  unsigned int i;
  int tmp;
  unsigned int avn;
  void **p_argv;
  char *argp;
  ffi_type **p_arg;
 
  tmp = 0;
  argp = stack;
 
  if (ecif->cif->rtype->type == FFI_TYPE_STRUCT && ecif->cif->rtype->size > 8)
    {
      *(void **) argp = ecif->rvalue;
      argp += 4;
    }
 
  avn = ecif->cif->nargs;
  p_argv = ecif->avalue;
 
  for (i = ecif->cif->nargs, p_arg = ecif->cif->arg_types;
       (i != 0) && (avn != 0);
       i--, p_arg++)
    {
      size_t z;
 
      /* Align if necessary.  */
      if (((*p_arg)->alignment - 1) & (unsigned) argp)
        argp = (char *) ALIGN (argp, (*p_arg)->alignment);
 
      if (avn != 0)
        {
          avn--;
          z = (*p_arg)->size;
          if (z < sizeof (int))
            {
              z = sizeof (int);
 
              switch ((*p_arg)->type)
                {
                case FFI_TYPE_SINT8:
                  *(signed int *) argp = (signed int)*(SINT8 *)(* p_argv);
                  break;
 
                case FFI_TYPE_UINT8:
                  *(unsigned int *) argp = (unsigned int)*(UINT8 *)(* p_argv);
                  break;
 
                case FFI_TYPE_SINT16:
                  *(signed int *) argp = (signed int)*(SINT16 *)(* p_argv);
                  break;
 
                case FFI_TYPE_UINT16:
                  *(unsigned int *) argp = (unsigned int)*(UINT16 *)(* p_argv);
                  break;
 
                case FFI_TYPE_STRUCT:
                  z = (*p_arg)->size;
                  if ((*p_arg)->alignment != 1)
                    memcpy (argp, *p_argv, z);
                  else
                    memcpy (argp + 4 - z, *p_argv, z);
                  z = sizeof (int);
                  break;
 
                default:
                  FFI_ASSERT(0);
                }
            }
          else if (z == sizeof (int))
            {
               *(unsigned int *) argp = (unsigned int)*(UINT32 *)(* p_argv);
            }
          else
            {
              if ((*p_arg)->type == FFI_TYPE_STRUCT)
                {
                  if (z > 8)
                    {
                      *(unsigned int *) argp = (unsigned int)(void *)(* p_argv);
                      z = sizeof(void *);
                    }
                  else
                    {
                      memcpy(argp, *p_argv, z);
                      z = 8;
                    }
                }
              else
                {
                  /* Double or long long 64bit.  */
                  memcpy (argp, *p_argv, z);
                }
            }
          p_argv++;
          argp += z;
        }
    }
 
  return;
}
 
/* Perform machine dependent cif processing.  */
ffi_status
ffi_prep_cif_machdep(ffi_cif *cif)
{
  /* Set the return type flag.  */
  switch (cif->rtype->type)
    {
    case FFI_TYPE_VOID:
      cif->flags = (unsigned) cif->rtype->type;
      break;
 
    case FFI_TYPE_STRUCT:
      if (cif->rtype->size <= 4)
        cif->flags = FFI_TYPE_INT;
 
      else if (cif->rtype->size <= 8)
        cif->flags = FFI_TYPE_DOUBLE;
 
      else
        cif->flags = (unsigned) cif->rtype->type;
      break;
 
    case FFI_TYPE_SINT64:
    case FFI_TYPE_UINT64:
    case FFI_TYPE_DOUBLE:
      cif->flags = FFI_TYPE_DOUBLE;
      break;
 
    case FFI_TYPE_FLOAT:
    default:
      cif->flags = FFI_TYPE_INT;
      break;
    }
 
  return FFI_OK;
}
 
/*@-declundef@*/
/*@-exportheader@*/
extern void ffi_call_SYSV(void (*)(char *, extended_cif *),
                          /*@out@*/ extended_cif *,
                          unsigned, unsigned,
                          /*@out@*/ unsigned *,
                          void (*fn)());
/*@=declundef@*/
/*@=exportheader@*/
 
void ffi_call(/*@dependent@*/ ffi_cif *cif,
              void (*fn)(),
              /*@out@*/ void *rvalue,
              /*@dependent@*/ void **avalue)
{
  extended_cif ecif;
 
  ecif.cif = cif;
  ecif.avalue = avalue;
 
  /* If the return value is a struct and we don't have
     a return value address then we need to make one.  */
  if ((rvalue == NULL) &&
      (cif->rtype->type == FFI_TYPE_STRUCT))
    {
      /*@-sysunrecog@*/
      ecif.rvalue = alloca (cif->rtype->size);
      /*@=sysunrecog@*/
    }
  else
    ecif.rvalue = rvalue;
 
  switch (cif->abi)
    {
    case FFI_SYSV:
      /*@-usedef@*/
      ffi_call_SYSV(ffi_prep_args, &ecif, cif->bytes,
                    cif->flags, ecif.rvalue, fn);
      if (cif->rtype->type == FFI_TYPE_STRUCT)
        {
          int size = cif->rtype->size;
          int align = cif->rtype->alignment;
 
          if (size < 4)
            {
              if (align == 1)
                *(unsigned long *)(ecif.rvalue) <<= (4 - size) * 8;
            }
          else if (4 < size && size < 8)
            {
              if (align == 1)
                {
                  memcpy (ecif.rvalue, ecif.rvalue + 8-size, size);
                }
              else if (align == 2)
                {
                  if (size & 1)
                    size += 1;
 
                  if (size != 8)
                    memcpy (ecif.rvalue, ecif.rvalue + 8-size, size);
                }
            }
        }
      /*@=usedef@*/
      break;
 
    default:
      FFI_ASSERT(0);
      break;
    }
}

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[/] [scarts/] [trunk/] [toolchain/] [scarts-gcc/] [gcc-4.1.1/] [libffi/] [src/] [m32r/] [ffi.c] - Blame information for rev 14

Line No.	Rev	Author	Line
1	14	jlechner	`/* -----------------------------------------------------------------------`
2			`ffi.c - Copyright (c) 2004 Renesas Technology`
3
4			`M32R Foreign Function Interface`
5
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:`
13
14			`The above copyright notice and this permission notice shall be included`
15			`in all copies or substantial portions of the Software.`
16
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			`----------------------------------------------------------------------- */`
25
26			`#include <ffi.h>`
27			`#include <ffi_common.h>`
28
29			`#include <stdlib.h>`
30
31			`/* ffi_prep_args is called by the assembly routine once stack`
32			`space has been allocated for the function's arguments. */`
33
34			`/@-exportheader@/`
35			`void ffi_prep_args(char stack, extended_cif ecif)`
36			`/@=exportheader@/`
37			`{`
38			`unsigned int i;`
39			`int tmp;`
40			`unsigned int avn;`
41			`void **p_argv;`
42			`char *argp;`
43			`ffi_type **p_arg;`
44
45			`tmp = 0;`
46			`argp = stack;`
47
48			`if (ecif->cif->rtype->type == FFI_TYPE_STRUCT && ecif->cif->rtype->size > 8)`
49			`{`
50			`(void *) argp = ecif->rvalue;`
51			`argp += 4;`
52			`}`
53
54			`avn = ecif->cif->nargs;`
55			`p_argv = ecif->avalue;`
56
57			`for (i = ecif->cif->nargs, p_arg = ecif->cif->arg_types;`
58			`(i != 0) && (avn != 0);`
59			`i--, p_arg++)`
60			`{`
61			`size_t z;`
62
63			`/* Align if necessary. */`
64			`if (((*p_arg)->alignment - 1) & (unsigned) argp)`
65			`argp = (char ) ALIGN (argp, (p_arg)->alignment);`
66
67			`if (avn != 0)`
68			`{`
69			`avn--;`
70			`z = (*p_arg)->size;`
71			`if (z < sizeof (int))`
72			`{`
73			`z = sizeof (int);`
74
75			`switch ((*p_arg)->type)`
76			`{`
77			`case FFI_TYPE_SINT8:`
78			`(signed int ) argp = (signed int)(SINT8 )(* p_argv);`
79			`break;`
80
81			`case FFI_TYPE_UINT8:`
82			`(unsigned int ) argp = (unsigned int)(UINT8 )(* p_argv);`
83			`break;`
84
85			`case FFI_TYPE_SINT16:`
86			`(signed int ) argp = (signed int)(SINT16 )(* p_argv);`
87			`break;`
88
89			`case FFI_TYPE_UINT16:`
90			`(unsigned int ) argp = (unsigned int)(UINT16 )(* p_argv);`
91			`break;`
92
93			`case FFI_TYPE_STRUCT:`
94			`z = (*p_arg)->size;`
95			`if ((*p_arg)->alignment != 1)`
96			`memcpy (argp, *p_argv, z);`
97			`else`
98			`memcpy (argp + 4 - z, *p_argv, z);`
99			`z = sizeof (int);`
100			`break;`
101
102			`default:`
103			`FFI_ASSERT(0);`
104			`}`
105			`}`
106			`else if (z == sizeof (int))`
107			`{`
108			`(unsigned int ) argp = (unsigned int)(UINT32 )(* p_argv);`
109			`}`
110			`else`
111			`{`
112			`if ((*p_arg)->type == FFI_TYPE_STRUCT)`
113			`{`
114			`if (z > 8)`
115			`{`
116			`(unsigned int ) argp = (unsigned int)(void )( p_argv);`
117			`z = sizeof(void *);`
118			`}`
119			`else`
120			`{`
121			`memcpy(argp, *p_argv, z);`
122			`z = 8;`
123			`}`
124			`}`
125			`else`
126			`{`
127			`/* Double or long long 64bit. */`
128			`memcpy (argp, *p_argv, z);`
129			`}`
130			`}`
131			`p_argv++;`
132			`argp += z;`
133			`}`
134			`}`
135
136			`return;`
137			`}`
138
139			`/* Perform machine dependent cif processing. */`
140			`ffi_status`
141			`ffi_prep_cif_machdep(ffi_cif *cif)`
142			`{`
143			`/* Set the return type flag. */`
144			`switch (cif->rtype->type)`
145			`{`
146			`case FFI_TYPE_VOID:`
147			`cif->flags = (unsigned) cif->rtype->type;`
148			`break;`
149
150			`case FFI_TYPE_STRUCT:`
151			`if (cif->rtype->size <= 4)`
152			`cif->flags = FFI_TYPE_INT;`
153
154			`else if (cif->rtype->size <= 8)`
155			`cif->flags = FFI_TYPE_DOUBLE;`
156
157			`else`
158			`cif->flags = (unsigned) cif->rtype->type;`
159			`break;`
160
161			`case FFI_TYPE_SINT64:`
162			`case FFI_TYPE_UINT64:`
163			`case FFI_TYPE_DOUBLE:`
164			`cif->flags = FFI_TYPE_DOUBLE;`
165			`break;`
166
167			`case FFI_TYPE_FLOAT:`
168			`default:`
169			`cif->flags = FFI_TYPE_INT;`
170			`break;`
171			`}`
172
173			`return FFI_OK;`
174			`}`
175
176			`/@-declundef@/`
177			`/@-exportheader@/`
178			`extern void ffi_call_SYSV(void ()(char , extended_cif *),`
179			`/@out@/ extended_cif *,`
180			`unsigned, unsigned,`
181			`/@out@/ unsigned *,`
182			`void (*fn)());`
183			`/@=declundef@/`
184			`/@=exportheader@/`
185
186			`void ffi_call(/@dependent@/ ffi_cif *cif,`
187			`void (*fn)(),`
188			`/@out@/ void *rvalue,`
189			`/@dependent@/ void **avalue)`
190			`{`
191			`extended_cif ecif;`
192
193			`ecif.cif = cif;`
194			`ecif.avalue = avalue;`
195
196			`/* If the return value is a struct and we don't have`
197			`a return value address then we need to make one. */`
198			`if ((rvalue == NULL) &&`
199			`(cif->rtype->type == FFI_TYPE_STRUCT))`
200			`{`
201			`/@-sysunrecog@/`
202			`ecif.rvalue = alloca (cif->rtype->size);`
203			`/@=sysunrecog@/`
204			`}`
205			`else`
206			`ecif.rvalue = rvalue;`
207
208			`switch (cif->abi)`
209			`{`
210			`case FFI_SYSV:`
211			`/@-usedef@/`
212			`ffi_call_SYSV(ffi_prep_args, &ecif, cif->bytes,`
213			`cif->flags, ecif.rvalue, fn);`
214			`if (cif->rtype->type == FFI_TYPE_STRUCT)`
215			`{`
216			`int size = cif->rtype->size;`
217			`int align = cif->rtype->alignment;`
218
219			`if (size < 4)`
220			`{`
221			`if (align == 1)`
222			`(unsigned long )(ecif.rvalue) <<= (4 - size) * 8;`
223			`}`
224			`else if (4 < size && size < 8)`
225			`{`
226			`if (align == 1)`
227			`{`
228			`memcpy (ecif.rvalue, ecif.rvalue + 8-size, size);`
229			`}`
230			`else if (align == 2)`
231			`{`
232			`if (size & 1)`
233			`size += 1;`
234
235			`if (size != 8)`
236			`memcpy (ecif.rvalue, ecif.rvalue + 8-size, size);`
237			`}`
238			`}`
239			`}`
240			`/@=usedef@/`
241			`break;`
242
243			`default:`
244			`FFI_ASSERT(0);`
245			`break;`
246			`}`
247			`}`