[thirdparty/gcc.git] / libffi / src / arc / ffi.c

/* -----------------------------------------------------------------------
   ffi.c - Copyright (c) 2013  Synopsys, Inc. (www.synopsys.com)
   
   ARC 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>
#include <stdint.h>

#include <sys/cachectl.h>

/* for little endian ARC, the code is in fact stored as mixed endian for
   performance reasons */
#if __BIG_ENDIAN__
#define CODE_ENDIAN(x) (x)
#else
#define CODE_ENDIAN(x) ( (((uint32_t) (x)) << 16) | (((uint32_t) (x)) >> 16))
#endif

/* ffi_prep_args is called by the assembly routine once stack
   space has been allocated for the function's arguments.  */

void
ffi_prep_args (char *stack, extended_cif * ecif)
{
  unsigned int i;
  void **p_argv;
  char *argp;
  ffi_type **p_arg;

  argp = stack;

  if (ecif->cif->rtype->type == FFI_TYPE_STRUCT)
    {
      *(void **) argp = ecif->rvalue;
      argp += 4;
    }

  p_argv = ecif->avalue;

  for (i = ecif->cif->nargs, p_arg = ecif->cif->arg_types;
       (i != 0); i--, p_arg++)
    {
      size_t z;
      int alignment;

      /* align alignment to 4 */
      alignment = (((*p_arg)->alignment - 1) | 3) + 1;

      /* Align if necessary.  */
      if ((alignment - 1) & (unsigned) argp)
	argp = (char *) FFI_ALIGN (argp, alignment);

      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:
	      memcpy (argp, *p_argv, (*p_arg)->size);
	      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)
	    {
	      memcpy (argp, *p_argv, z);
	    }
	  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:
      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;
}

extern void ffi_call_ARCompact (void (*)(char *, extended_cif *),
				extended_cif *, unsigned, unsigned,
				unsigned *, void (*fn) (void));

void
ffi_call (ffi_cif * cif, void (*fn) (void), void *rvalue, 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))
    {
      ecif.rvalue = alloca (cif->rtype->size);
    }
  else
    ecif.rvalue = rvalue;

  switch (cif->abi)
    {
    case FFI_ARCOMPACT:
      ffi_call_ARCompact (ffi_prep_args, &ecif, cif->bytes,
			  cif->flags, ecif.rvalue, fn);
      break;

    default:
      FFI_ASSERT (0);
      break;
    }
}

int
ffi_closure_inner_ARCompact (ffi_closure * closure, void *rvalue,
			     ffi_arg * args)
{
  void **arg_area, **p_argv;
  ffi_cif *cif = closure->cif;
  char *argp = (char *) args;
  ffi_type **p_argt;
  int i;

  arg_area = (void **) alloca (cif->nargs * sizeof (void *));

  /* handle hidden argument */
  if (cif->flags == FFI_TYPE_STRUCT)
    {
      rvalue = *(void **) argp;
      argp += 4;
    }

  p_argv = arg_area;

  for (i = 0, p_argt = cif->arg_types; i < cif->nargs;
       i++, p_argt++, p_argv++)
    {
      size_t z;
      int alignment;

      /* align alignment to 4 */
      alignment = (((*p_argt)->alignment - 1) | 3) + 1;

      /* Align if necessary.  */
      if ((alignment - 1) & (unsigned) argp)
	argp = (char *) FFI_ALIGN (argp, alignment);

      z = (*p_argt)->size;
      *p_argv = (void *) argp;
      argp += z;
    }

  (closure->fun) (cif, rvalue, arg_area, closure->user_data);

  return cif->flags;
}

extern void ffi_closure_ARCompact (void);

ffi_status
ffi_prep_closure_loc (ffi_closure * closure, ffi_cif * cif,
		      void (*fun) (ffi_cif *, void *, void **, void *),
		      void *user_data, void *codeloc)
{
  uint32_t *tramp = (uint32_t *) & (closure->tramp[0]);

  switch (cif->abi)
    {
    case FFI_ARCOMPACT:
      FFI_ASSERT (tramp == codeloc);
      tramp[0] = CODE_ENDIAN (0x200a1fc0);	/* mov r8, pcl  */
      tramp[1] = CODE_ENDIAN (0x20200f80);	/* j [long imm] */
      tramp[2] = CODE_ENDIAN (ffi_closure_ARCompact);
      break;

    default:
      return FFI_BAD_ABI;
    }

  closure->cif = cif;
  closure->fun = fun;
  closure->user_data = user_data;
  cacheflush (codeloc, FFI_TRAMPOLINE_SIZE, BCACHE);

  return FFI_OK;
}
Commit	Line	Data
b1760f7f RH	1	/* -----------------------------------------------------------------------
	2	ffi.c - Copyright (c) 2013 Synopsys, Inc. (www.synopsys.com)
	3
	4	ARC 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	#include <stdint.h>
	31
	32	#include <sys/cachectl.h>
	33
	34	/* for little endian ARC, the code is in fact stored as mixed endian for
	35	performance reasons */
	36	#if __BIG_ENDIAN__
	37	#define CODE_ENDIAN(x) (x)
	38	#else
	39	#define CODE_ENDIAN(x) ( (((uint32_t) (x)) << 16) \| (((uint32_t) (x)) >> 16))
	40	#endif
	41
	42	/* ffi_prep_args is called by the assembly routine once stack
	43	space has been allocated for the function's arguments. */
	44
	45	void
	46	ffi_prep_args (char stack, extended_cif ecif)
	47	{
	48	unsigned int i;
b1760f7f RH	49	void **p_argv;
	50	char *argp;
	51	ffi_type **p_arg;
	52
b1760f7f RH	53	argp = stack;
	54
	55	if (ecif->cif->rtype->type == FFI_TYPE_STRUCT)
	56	{
	57	(void *) argp = ecif->rvalue;
	58	argp += 4;
	59	}
	60
	61	p_argv = ecif->avalue;
	62
	63	for (i = ecif->cif->nargs, p_arg = ecif->cif->arg_types;
	64	(i != 0); i--, p_arg++)
	65	{
	66	size_t z;
	67	int alignment;
	68
	69	/* align alignment to 4 */
	70	alignment = (((*p_arg)->alignment - 1) \| 3) + 1;
	71
	72	/* Align if necessary. */
	73	if ((alignment - 1) & (unsigned) argp)
92456a4e	74	argp = (char *) FFI_ALIGN (argp, alignment);
b1760f7f RH	75
	76	z = (*p_arg)->size;
	77	if (z < sizeof (int))
	78	{
	79	z = sizeof (int);
	80
	81	switch ((*p_arg)->type)
	82	{
	83	case FFI_TYPE_SINT8:
	84	(signed int ) argp = (signed int) (SINT8 ) (*p_argv);
	85	break;
	86
	87	case FFI_TYPE_UINT8:
	88	(unsigned int ) argp = (unsigned int) (UINT8 ) (*p_argv);
	89	break;
	90
	91	case FFI_TYPE_SINT16:
	92	(signed int ) argp = (signed int) (SINT16 ) (*p_argv);
	93	break;
	94
	95	case FFI_TYPE_UINT16:
	96	(unsigned int ) argp = (unsigned int) (UINT16 ) (*p_argv);
	97	break;
	98
	99	case FFI_TYPE_STRUCT:
	100	memcpy (argp, p_argv, (p_arg)->size);
	101	break;
	102
	103	default:
	104	FFI_ASSERT (0);
	105	}
	106	}
	107	else if (z == sizeof (int))
	108	{
	109	(unsigned int ) argp = (unsigned int) (UINT32 ) (*p_argv);
	110	}
	111	else
	112	{
	113	if ((*p_arg)->type == FFI_TYPE_STRUCT)
	114	{
	115	memcpy (argp, *p_argv, z);
	116	}
	117	else
	118	{
	119	/* Double or long long 64bit. */
	120	memcpy (argp, *p_argv, z);
	121	}
	122	}
	123	p_argv++;
	124	argp += z;
	125	}
	126
	127	return;
	128	}
	129
	130	/* Perform machine dependent cif processing. */
	131	ffi_status
	132	ffi_prep_cif_machdep (ffi_cif * cif)
	133	{
	134	/* Set the return type flag. */
	135	switch (cif->rtype->type)
	136	{
	137	case FFI_TYPE_VOID:
	138	cif->flags = (unsigned) cif->rtype->type;
139	break;
140
141	case FFI_TYPE_STRUCT:
142	cif->flags = (unsigned) cif->rtype->type;
143	break;
144
145	case FFI_TYPE_SINT64:
146	case FFI_TYPE_UINT64:
147	case FFI_TYPE_DOUBLE:
148	cif->flags = FFI_TYPE_DOUBLE;
149	break;
150
151	case FFI_TYPE_FLOAT:
152	default:
153	cif->flags = FFI_TYPE_INT;
154	break;
155	}
156
157	return FFI_OK;
158	}
159
160	extern void ffi_call_ARCompact (void ()(char , extended_cif *),
161	extended_cif *, unsigned, unsigned,
162	unsigned , void (fn) (void));
163
164	void
165	ffi_call (ffi_cif * cif, void (fn) (void), void rvalue, void **avalue)
166	{
167	extended_cif ecif;
168
169	ecif.cif = cif;
170	ecif.avalue = avalue;
171
172	/* If the return value is a struct and we don't have
173	a return value address then we need to make one. */
174	if ((rvalue == NULL) && (cif->rtype->type == FFI_TYPE_STRUCT))
175	{
176	ecif.rvalue = alloca (cif->rtype->size);
177	}
178	else
179	ecif.rvalue = rvalue;
180
181	switch (cif->abi)
182	{
183	case FFI_ARCOMPACT:
184	ffi_call_ARCompact (ffi_prep_args, &ecif, cif->bytes,
185	cif->flags, ecif.rvalue, fn);
186	break;
187
188	default:
189	FFI_ASSERT (0);
190	break;
191	}
192	}
193
194	int
195	ffi_closure_inner_ARCompact (ffi_closure * closure, void *rvalue,
196	ffi_arg * args)
197	{
198	void arg_area, p_argv;
199	ffi_cif *cif = closure->cif;
200	char argp = (char ) args;
201	ffi_type **p_argt;
202	int i;
203
204	arg_area = (void *) alloca (cif->nargs sizeof (void *));
205
206	/* handle hidden argument */
207	if (cif->flags == FFI_TYPE_STRUCT)
208	{
209	rvalue = (void *) argp;
210	argp += 4;
211	}
212
213	p_argv = arg_area;
214
215	for (i = 0, p_argt = cif->arg_types; i < cif->nargs;
216	i++, p_argt++, p_argv++)
217	{
218	size_t z;
219	int alignment;
220
221	/* align alignment to 4 */
222	alignment = (((*p_argt)->alignment - 1) \| 3) + 1;
223
224	/* Align if necessary. */
225	if ((alignment - 1) & (unsigned) argp)
92456a4e	226	argp = (char *) FFI_ALIGN (argp, alignment);
b1760f7f RH	227
	228	z = (*p_argt)->size;
	229	p_argv = (void ) argp;
	230	argp += z;
	231	}
	232
	233	(closure->fun) (cif, rvalue, arg_area, closure->user_data);
	234
	235	return cif->flags;
	236	}
	237
	238	extern void ffi_closure_ARCompact (void);
	239
	240	ffi_status
	241	ffi_prep_closure_loc (ffi_closure * closure, ffi_cif * cif,
	242	void (fun) (ffi_cif , void , void , void ),
	243	void user_data, void codeloc)
	244	{
	245	uint32_t tramp = (uint32_t ) & (closure->tramp[0]);
	246
	247	switch (cif->abi)
	248	{
	249	case FFI_ARCOMPACT:
	250	FFI_ASSERT (tramp == codeloc);
	251	tramp[0] = CODE_ENDIAN (0x200a1fc0); /* mov r8, pcl */
	252	tramp[1] = CODE_ENDIAN (0x20200f80); /* j [long imm] */
	253	tramp[2] = CODE_ENDIAN (ffi_closure_ARCompact);
	254	break;
	255
	256	default:
	257	return FFI_BAD_ABI;
	258	}
	259
	260	closure->cif = cif;
	261	closure->fun = fun;
	262	closure->user_data = user_data;
	263	cacheflush (codeloc, FFI_TRAMPOLINE_SIZE, BCACHE);
	264
	265	return FFI_OK;
	266	}