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

/* -----------------------------------------------------------------------
   ffi.c - Copyright (c) 1996, 2003, 2004 Red Hat, Inc.
   
   SPARC 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 CYGNUS SOLUTIONS 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 */

void ffi_prep_args_v8(char *stack, extended_cif *ecif)
{
  int i;
  void **p_argv;
  char *argp;
  ffi_type **p_arg;

  /* Skip 16 words for the window save area */
  argp = stack + 16*sizeof(int);

  /* This should only really be done when we are returning a structure,
     however, it's faster just to do it all the time...

  if ( ecif->cif->rtype->type == FFI_TYPE_STRUCT ) */
  *(int *) argp = (long)ecif->rvalue;

  /* And 1 word for the  structure return value. */
  argp += sizeof(int);

#ifdef USING_PURIFY
  /* Purify will probably complain in our assembly routine, unless we
     zero out this memory. */

  ((int*)argp)[0] = 0;
  ((int*)argp)[1] = 0;
  ((int*)argp)[2] = 0;
  ((int*)argp)[3] = 0;
  ((int*)argp)[4] = 0;
  ((int*)argp)[5] = 0;
#endif

  p_argv = ecif->avalue;

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

	  if ((*p_arg)->type == FFI_TYPE_STRUCT
#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
	      || (*p_arg)->type == FFI_TYPE_LONGDOUBLE
#endif
	      )
	    {
	      *(unsigned int *) argp = (unsigned long)(* p_argv);
	      z = sizeof(int);
	    }
	  else
	    {
	      z = (*p_arg)->size;
	      if (z < sizeof(int))
		{
		  z = sizeof(int);
		  switch ((*p_arg)->type)
		    {
		    case FFI_TYPE_SINT8:
		      *(signed int *) argp = *(SINT8 *)(* p_argv);
		      break;
		      
		    case FFI_TYPE_UINT8:
		      *(unsigned int *) argp = *(UINT8 *)(* p_argv);
		      break;
		      
		    case FFI_TYPE_SINT16:
		      *(signed int *) argp = *(SINT16 *)(* p_argv);
		      break;
		      
		    case FFI_TYPE_UINT16:
		      *(unsigned int *) argp = *(UINT16 *)(* p_argv);
		      break;

		    default:
		      FFI_ASSERT(0);
		    }
		}
	      else
		{
		  memcpy(argp, *p_argv, z);
		}
	    }
	  p_argv++;
	  argp += z;
    }
  
  return;
}

int ffi_prep_args_v9(char *stack, extended_cif *ecif)
{
  int i, ret = 0;
  int tmp;
  void **p_argv;
  char *argp;
  ffi_type **p_arg;

  tmp = 0;

  /* Skip 16 words for the window save area */
  argp = stack + 16*sizeof(long long);

#ifdef USING_PURIFY
  /* Purify will probably complain in our assembly routine, unless we
     zero out this memory. */

  ((long long*)argp)[0] = 0;
  ((long long*)argp)[1] = 0;
  ((long long*)argp)[2] = 0;
  ((long long*)argp)[3] = 0;
  ((long long*)argp)[4] = 0;
  ((long long*)argp)[5] = 0;
#endif

  p_argv = ecif->avalue;

  if (ecif->cif->rtype->type == FFI_TYPE_STRUCT &&
      ecif->cif->rtype->size > 32)
    {
      *(unsigned long long *) argp = (unsigned long)ecif->rvalue;
      argp += sizeof(long long);
      tmp = 1;
    }

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

      z = (*p_arg)->size;
      switch ((*p_arg)->type)
	{
	case FFI_TYPE_STRUCT:
	  if (z > 16)
	    {
	      /* For structures larger than 16 bytes we pass reference.  */
	      *(unsigned long long *) argp = (unsigned long)* p_argv;
	      argp += sizeof(long long);
	      tmp++;
	      p_argv++;
	      continue;
	    }
	  /* FALLTHROUGH */
	case FFI_TYPE_FLOAT:
	case FFI_TYPE_DOUBLE:
#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
	case FFI_TYPE_LONGDOUBLE:
#endif
	  ret = 1; /* We should promote into FP regs as well as integer.  */
	  break;
	}
      if (z < sizeof(long long))
	{
	  switch ((*p_arg)->type)
	    {
	    case FFI_TYPE_SINT8:
	      *(signed long long *) argp = *(SINT8 *)(* p_argv);
	      break;

	    case FFI_TYPE_UINT8:
	      *(unsigned long long *) argp = *(UINT8 *)(* p_argv);
	      break;

	    case FFI_TYPE_SINT16:
	      *(signed long long *) argp = *(SINT16 *)(* p_argv);
	      break;

	    case FFI_TYPE_UINT16:
	      *(unsigned long long *) argp = *(UINT16 *)(* p_argv);
	      break;

	    case FFI_TYPE_SINT32:
	      *(signed long long *) argp = *(SINT32 *)(* p_argv);
	      break;

	    case FFI_TYPE_UINT32:
	      *(unsigned long long *) argp = *(UINT32 *)(* p_argv);
	      break;

	    case FFI_TYPE_FLOAT:
	      *(float *) (argp + 4) = *(FLOAT32 *)(* p_argv); /* Right justify */
	      break;

	    case FFI_TYPE_STRUCT:
	      memcpy(argp, *p_argv, z);
	      break;

	    default:
	      FFI_ASSERT(0);
	    }
	  z = sizeof(long long);
	  tmp++;
	}
      else if (z == sizeof(long long))
	{
	  memcpy(argp, *p_argv, z);
	  z = sizeof(long long);
	  tmp++;
	}
      else
	{
	  if ((tmp & 1) && (*p_arg)->alignment > 8)
	    {
	      tmp++;
	      argp += sizeof(long long);
	    }
	  memcpy(argp, *p_argv, z);
	  z = 2 * sizeof(long long);
	  tmp += 2;
	}
      p_argv++;
      argp += z;
    }

  return ret;
}

/* Perform machine dependent cif processing */
ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
{
  int wordsize;

  if (cif->abi != FFI_V9)
    {
      wordsize = 4;

      /* If we are returning a struct, this will already have been added.
	 Otherwise we need to add it because it's always got to be there! */

      if (cif->rtype->type != FFI_TYPE_STRUCT)
	cif->bytes += wordsize;

      /* sparc call frames require that space is allocated for 6 args,
	 even if they aren't used. Make that space if necessary. */
  
      if (cif->bytes < 4*6+4)
	cif->bytes = 4*6+4;
    }
  else
    {
      wordsize = 8;

      /* sparc call frames require that space is allocated for 6 args,
	 even if they aren't used. Make that space if necessary. */
  
      if (cif->bytes < 8*6)
	cif->bytes = 8*6;
    }

  /* Adjust cif->bytes. to include 16 words for the window save area,
     and maybe the struct/union return pointer area, */

  cif->bytes += 16 * wordsize;

  /* The stack must be 2 word aligned, so round bytes up
     appropriately. */

  cif->bytes = ALIGN(cif->bytes, 2 * wordsize);

  /* Set the return type flag */
  switch (cif->rtype->type)
    {
    case FFI_TYPE_VOID:
    case FFI_TYPE_FLOAT:
    case FFI_TYPE_DOUBLE:
#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
    case FFI_TYPE_LONGDOUBLE:
#endif
      cif->flags = cif->rtype->type;
      break;

    case FFI_TYPE_STRUCT:
      if (cif->abi == FFI_V9 && cif->rtype->size > 32)
	cif->flags = FFI_TYPE_VOID;
      else
	cif->flags = FFI_TYPE_STRUCT;
      break;

    case FFI_TYPE_SINT64:
    case FFI_TYPE_UINT64:
      if (cif->abi != FFI_V9)
	{
	  cif->flags = FFI_TYPE_SINT64;
	  break;
	}
      /* FALLTHROUGH */
    default:
      cif->flags = FFI_TYPE_INT;
      break;
    }
  return FFI_OK;
}

int ffi_v9_layout_struct(ffi_type *arg, int off, char *ret, char *intg, char *flt)
{
  ffi_type **ptr = &arg->elements[0];

  while (*ptr != NULL)
    {
      if (off & ((*ptr)->alignment - 1))
	off = ALIGN(off, (*ptr)->alignment);

      switch ((*ptr)->type)
	{
	case FFI_TYPE_STRUCT:
	  off = ffi_v9_layout_struct(*ptr, off, ret, intg, flt);
	  off = ALIGN(off, FFI_SIZEOF_ARG);
	  break;
	case FFI_TYPE_FLOAT:
	case FFI_TYPE_DOUBLE:
#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
	case FFI_TYPE_LONGDOUBLE:
#endif
	  memmove(ret + off, flt + off, (*ptr)->size);
	  off += (*ptr)->size;
	  break;
	default:
	  memmove(ret + off, intg + off, (*ptr)->size);
	  off += (*ptr)->size;
	  break;
	}
      ptr++;
    }
  return off;
}


#ifdef SPARC64
extern int ffi_call_v9(void *, extended_cif *, unsigned, 
		       unsigned, unsigned *, void (*fn)());
#else
extern int ffi_call_v8(void *, extended_cif *, unsigned, 
		       unsigned, unsigned *, void (*fn)());
#endif

void ffi_call(ffi_cif *cif, void (*fn)(), void *rvalue, void **avalue)
{
  extended_cif ecif;
  void *rval = rvalue;

  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		        */

  ecif.rvalue = rvalue;
  if (cif->rtype->type == FFI_TYPE_STRUCT)
    {
      if (cif->rtype->size <= 32)
	rval = alloca(64);
      else
	{
	  rval = NULL;
	  if (rvalue == NULL)
	    ecif.rvalue = alloca(cif->rtype->size);
	}
    }

  switch (cif->abi) 
    {
    case FFI_V8:
#ifdef SPARC64
      /* We don't yet support calling 32bit code from 64bit */
      FFI_ASSERT(0);
#else
      ffi_call_v8(ffi_prep_args_v8, &ecif, cif->bytes, 
		  cif->flags, rvalue, fn);
#endif
      break;
    case FFI_V9:
#ifdef SPARC64
      ffi_call_v9(ffi_prep_args_v9, &ecif, cif->bytes,
		  cif->flags, rval, fn);
      if (rvalue && rval && cif->rtype->type == FFI_TYPE_STRUCT)
	ffi_v9_layout_struct(cif->rtype, 0, (char *)rvalue, (char *)rval, ((char *)rval)+32);
#else
      /* And vice versa */
      FFI_ASSERT(0);
#endif
      break;
    default:
      FFI_ASSERT(0);
      break;
    }

}


#ifdef SPARC64
extern void ffi_closure_v9(void);
#else
extern void ffi_closure_v8(void);
#endif

ffi_status
ffi_prep_closure (ffi_closure* closure,
		  ffi_cif* cif,
		  void (*fun)(ffi_cif*, void*, void**, void*),
		  void *user_data)
{
  unsigned int *tramp = (unsigned int *) &closure->tramp[0];
  unsigned long fn;
#ifdef SPARC64
  /* Trampoline address is equal to the closure address.  We take advantage
     of that to reduce the trampoline size by 8 bytes. */
  FFI_ASSERT (cif->abi == FFI_V9);
  fn = (unsigned long) ffi_closure_v9;
  tramp[0] = 0x83414000;	/* rd	%pc, %g1	*/
  tramp[1] = 0xca586010;	/* ldx	[%g1+16], %g5	*/
  tramp[2] = 0x81c14000;	/* jmp	%g5		*/
  tramp[3] = 0x01000000;	/* nop			*/
  *((unsigned long *) &tramp[4]) = fn;
#else
  unsigned long ctx = (unsigned long) closure;
  FFI_ASSERT (cif->abi == FFI_V8);
  fn = (unsigned long) ffi_closure_v8;
  tramp[0] = 0x03000000 | fn >> 10;	/* sethi %hi(fn), %g1	*/
  tramp[1] = 0x05000000 | ctx >> 10;	/* sethi %hi(ctx), %g2	*/
  tramp[2] = 0x81c06000 | (fn & 0x3ff);	/* jmp   %g1+%lo(fn)	*/
  tramp[3] = 0x8410a000 | (ctx & 0x3ff);/* or    %g2, %lo(ctx)	*/
#endif

  closure->cif = cif;
  closure->fun = fun;
  closure->user_data = user_data;

  /* Flush the Icache.  FIXME: alignment isn't certain, assume 8 bytes */
#ifdef SPARC64
  asm volatile ("flush	%0" : : "r" (closure) : "memory");
  asm volatile ("flush	%0" : : "r" (((char *) closure) + 8) : "memory");
#else
  asm volatile ("iflush	%0" : : "r" (closure) : "memory");
  asm volatile ("iflush	%0" : : "r" (((char *) closure) + 8) : "memory");
#endif

  return FFI_OK;
}

int
ffi_closure_sparc_inner_v8(ffi_closure *closure,
  void *rvalue, unsigned long *gpr)
{
  ffi_cif *cif;
  ffi_type **arg_types;
  void **avalue;
  int i, argn;

  cif = closure->cif;
  arg_types = cif->arg_types;
  avalue = alloca(cif->nargs * sizeof(void *));

  /* Copy the caller's structure return address so that the closure
     returns the data directly to the caller.  */
  if (cif->flags == FFI_TYPE_STRUCT
#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE  
      || cif->flags == FFI_TYPE_LONGDOUBLE
#endif
     )
    rvalue = (void *) gpr[0];

  /* Always skip the structure return address.  */
  argn = 1;

  /* Grab the addresses of the arguments from the stack frame.  */
  for (i = 0; i < cif->nargs; i++)
    {
      if (arg_types[i]->type == FFI_TYPE_STRUCT
#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
	  || arg_types[i]->type == FFI_TYPE_LONGDOUBLE
#endif
         )
	{
	  /* Straight copy of invisible reference.  */
	  avalue[i] = (void *)gpr[argn++];
	}
      else
	{
	  /* Always right-justify.  */
	  argn += ALIGN(arg_types[i]->size, FFI_SIZEOF_ARG) / FFI_SIZEOF_ARG;
	  avalue[i] = ((char *) &gpr[argn]) - arg_types[i]->size;
	}
    }

  /* Invoke the closure.  */
  (closure->fun) (cif, rvalue, avalue, closure->user_data);

  /* Tell ffi_closure_sparc how to perform return type promotions.  */
  return cif->rtype->type;
}

int
ffi_closure_sparc_inner_v9(ffi_closure *closure,
  void *rvalue, unsigned long *gpr, double *fpr)
{
  ffi_cif *cif;
  ffi_type **arg_types;
  void **avalue;
  int i, argn, fp_slot_max;

  cif = closure->cif;
  arg_types = cif->arg_types;
  avalue = alloca(cif->nargs * sizeof(void *));

  /* Copy the caller's structure return address so that the closure
     returns the data directly to the caller.  */
  if (cif->flags == FFI_TYPE_VOID
      && cif->rtype->type == FFI_TYPE_STRUCT)
    {
      rvalue = (void *) gpr[0];
      /* Skip the structure return address.  */
      argn = 1;
    }
  else
    argn = 0;

  fp_slot_max = 16 - argn;

  /* Grab the addresses of the arguments from the stack frame.  */
  for (i = 0; i < cif->nargs; i++)
    {
      if (arg_types[i]->type == FFI_TYPE_STRUCT)
	{
	  if (arg_types[i]->size > 16)
	    {
	      /* Straight copy of invisible reference.  */
	      avalue[i] = (void *)gpr[argn++];
	    }
	  else
	    {
	      /* Left-justify.  */
	      ffi_v9_layout_struct(arg_types[i],
				   0,
				   (char *) &gpr[argn],
				   (char *) &gpr[argn],
				   (char *) &fpr[argn]);
	      avalue[i] = &gpr[argn];
	      argn += ALIGN(arg_types[i]->size, FFI_SIZEOF_ARG) / FFI_SIZEOF_ARG;
	    }
	}
      else
	{
	  /* Right-justify.  */
	  argn += ALIGN(arg_types[i]->size, FFI_SIZEOF_ARG) / FFI_SIZEOF_ARG;

	  if (i < fp_slot_max
	      && (arg_types[i]->type == FFI_TYPE_FLOAT
		  || arg_types[i]->type == FFI_TYPE_DOUBLE
#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
		  || arg_types[i]->type == FFI_TYPE_LONGDOUBLE
#endif
		  ))
	    avalue[i] = ((char *) &fpr[argn]) - arg_types[i]->size;
	  else
	    avalue[i] = ((char *) &gpr[argn]) - arg_types[i]->size;
	}
    }

  /* Invoke the closure.  */
  (closure->fun) (cif, rvalue, avalue, closure->user_data);

  /* Tell ffi_closure_sparc how to perform return type promotions.  */
  return cif->rtype->type;
}
Commit	Line	Data
63e5e3e0	1	/* -----------------------------------------------------------------------
0ce78f01	2	ffi.c - Copyright (c) 1996, 2003, 2004 Red Hat, Inc.
63e5e3e0	3
0ce78f01	4	SPARC Foreign Function Interface
63e5e3e0	5
63e5e3e0 AG	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 CYGNUS SOLUTIONS 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
c75c7793	31
63e5e3e0 AG	32	/* ffi_prep_args is called by the assembly routine once stack space
	33	has been allocated for the function's arguments */
	34
3791773c	35	void ffi_prep_args_v8(char stack, extended_cif ecif)
63e5e3e0 AG	36	{
63e5e3e0 AG	37	int i;
63e5e3e0 AG	38	void **p_argv;
	39	char *argp;
	40	ffi_type **p_arg;
	41
63e5e3e0	42	/* Skip 16 words for the window save area */
3791773c	43	argp = stack + 16*sizeof(int);
63e5e3e0 AG	44
	45	/* This should only really be done when we are returning a structure,
	46	however, it's faster just to do it all the time...
	47
	48	if ( ecif->cif->rtype->type == FFI_TYPE_STRUCT ) */
3791773c	49	(int ) argp = (long)ecif->rvalue;
63e5e3e0 AG	50
63e5e3e0 AG	51	/* And 1 word for the structure return value. */
3791773c	52	argp += sizeof(int);
63e5e3e0 AG	53
	54	#ifdef USING_PURIFY
	55	/* Purify will probably complain in our assembly routine, unless we
	56	zero out this memory. */
	57
	58	((int*)argp)[0] = 0;
	59	((int*)argp)[1] = 0;
	60	((int*)argp)[2] = 0;
	61	((int*)argp)[3] = 0;
	62	((int*)argp)[4] = 0;
	63	((int*)argp)[5] = 0;
	64	#endif
	65
63e5e3e0 AG	66	p_argv = ecif->avalue;
63e5e3e0 AG	67
c94974ca	68	for (i = ecif->cif->nargs, p_arg = ecif->cif->arg_types; i; i--, p_arg++)
63e5e3e0 AG	69	{
	70	size_t z;
	71
63e5e3e0	72	if ((*p_arg)->type == FFI_TYPE_STRUCT
3791773c JJ	73	#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
	74	\|\| (*p_arg)->type == FFI_TYPE_LONGDOUBLE
	75	#endif
	76	)
63e5e3e0	77	{
3791773c JJ	78	(unsigned int ) argp = (unsigned long)(* p_argv);
3791773c JJ	79	z = sizeof(int);
63e5e3e0 AG	80	}
	81	else
	82	{
	83	z = (*p_arg)->size;
	84	if (z < sizeof(int))
	85	{
	86	z = sizeof(int);
	87	switch ((*p_arg)->type)
	88	{
	89	case FFI_TYPE_SINT8:
	90	(signed int ) argp = (SINT8 )(* p_argv);
	91	break;
	92
	93	case FFI_TYPE_UINT8:
	94	(unsigned int ) argp = (UINT8 )(* p_argv);
	95	break;
	96
	97	case FFI_TYPE_SINT16:
	98	(signed int ) argp = (SINT16 )(* p_argv);
	99	break;
	100
	101	case FFI_TYPE_UINT16:
	102	(unsigned int ) argp = (UINT16 )(* p_argv);
	103	break;
3791773c	104
63e5e3e0 AG	105	default:
	106	FFI_ASSERT(0);
	107	}
	108	}
	109	else
	110	{
	111	memcpy(argp, *p_argv, z);
	112	}
	113	}
	114	p_argv++;
	115	argp += z;
63e5e3e0 AG	116	}
	117
	118	return;
	119	}
	120
3791773c JJ	121	int ffi_prep_args_v9(char stack, extended_cif ecif)
	122	{
	123	int i, ret = 0;
	124	int tmp;
	125	void **p_argv;
	126	char *argp;
	127	ffi_type **p_arg;
	128
	129	tmp = 0;
	130
	131	/* Skip 16 words for the window save area */
	132	argp = stack + 16*sizeof(long long);
	133
	134	#ifdef USING_PURIFY
	135	/* Purify will probably complain in our assembly routine, unless we
	136	zero out this memory. */
	137
	138	((long long*)argp)[0] = 0;
	139	((long long*)argp)[1] = 0;
	140	((long long*)argp)[2] = 0;
	141	((long long*)argp)[3] = 0;
	142	((long long*)argp)[4] = 0;
	143	((long long*)argp)[5] = 0;
	144	#endif
	145
	146	p_argv = ecif->avalue;
	147
	148	if (ecif->cif->rtype->type == FFI_TYPE_STRUCT &&
	149	ecif->cif->rtype->size > 32)
	150	{
	151	(unsigned long long ) argp = (unsigned long)ecif->rvalue;
0ce78f01	152	argp += sizeof(long long);
3791773c JJ	153	tmp = 1;
	154	}
	155
	156	for (i = 0, p_arg = ecif->cif->arg_types; i < ecif->cif->nargs;
	157	i++, p_arg++)
	158	{
	159	size_t z;
	160
	161	z = (*p_arg)->size;
	162	switch ((*p_arg)->type)
	163	{
	164	case FFI_TYPE_STRUCT:
	165	if (z > 16)
	166	{
	167	/* For structures larger than 16 bytes we pass reference. */
	168	(unsigned long long ) argp = (unsigned long)* p_argv;
	169	argp += sizeof(long long);
	170	tmp++;
	171	p_argv++;
	172	continue;
	173	}
	174	/* FALLTHROUGH */
	175	case FFI_TYPE_FLOAT:
	176	case FFI_TYPE_DOUBLE:
	177	#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
	178	case FFI_TYPE_LONGDOUBLE:
	179	#endif
	180	ret = 1; /* We should promote into FP regs as well as integer. */
	181	break;
	182	}
	183	if (z < sizeof(long long))
	184	{
	185	switch ((*p_arg)->type)
	186	{
	187	case FFI_TYPE_SINT8:
	188	(signed long long ) argp = (SINT8 )(* p_argv);
	189	break;
	190
	191	case FFI_TYPE_UINT8:
	192	(unsigned long long ) argp = (UINT8 )(* p_argv);
	193	break;
	194
	195	case FFI_TYPE_SINT16:
	196	(signed long long ) argp = (SINT16 )(* p_argv);
	197	break;
	198
	199	case FFI_TYPE_UINT16:
	200	(unsigned long long ) argp = (UINT16 )(* p_argv);
	201	break;
	202
	203	case FFI_TYPE_SINT32:
	204	(signed long long ) argp = (SINT32 )(* p_argv);
	205	break;
	206
	207	case FFI_TYPE_UINT32:
	208	(unsigned long long ) argp = (UINT32 )(* p_argv);
	209	break;
	210
	211	case FFI_TYPE_FLOAT:
	212	(float ) (argp + 4) = (FLOAT32 )(* p_argv); /* Right justify */
	213	break;
	214
	215	case FFI_TYPE_STRUCT:
	216	memcpy(argp, *p_argv, z);
217	break;
218
219	default:
220	FFI_ASSERT(0);
221	}
222	z = sizeof(long long);
223	tmp++;
224	}
225	else if (z == sizeof(long long))
226	{
227	memcpy(argp, *p_argv, z);
228	z = sizeof(long long);
229	tmp++;
230	}
231	else
232	{
233	if ((tmp & 1) && (*p_arg)->alignment > 8)
234	{
235	tmp++;
236	argp += sizeof(long long);
237	}
238	memcpy(argp, *p_argv, z);
239	z = 2 * sizeof(long long);
240	tmp += 2;
241	}
242	p_argv++;
243	argp += z;
244	}
245
246	return ret;
247	}
248
63e5e3e0 AG	249	/* Perform machine dependent cif processing */
	250	ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
	251	{
3791773c JJ	252	int wordsize;
	253
	254	if (cif->abi != FFI_V9)
	255	{
	256	wordsize = 4;
63e5e3e0	257
3791773c JJ	258	/* If we are returning a struct, this will already have been added.
3791773c JJ	259	Otherwise we need to add it because it's always got to be there! */
63e5e3e0	260
3791773c JJ	261	if (cif->rtype->type != FFI_TYPE_STRUCT)
	262	cif->bytes += wordsize;
	263
	264	/* sparc call frames require that space is allocated for 6 args,
	265	even if they aren't used. Make that space if necessary. */
63e5e3e0	266
3791773c JJ	267	if (cif->bytes < 4*6+4)
	268	cif->bytes = 4*6+4;
	269	}
	270	else
	271	{
	272	wordsize = 8;
	273
	274	/* sparc call frames require that space is allocated for 6 args,
	275	even if they aren't used. Make that space if necessary. */
	276
	277	if (cif->bytes < 8*6)
	278	cif->bytes = 8*6;
	279	}
63e5e3e0 AG	280
	281	/* Adjust cif->bytes. to include 16 words for the window save area,
	282	and maybe the struct/union return pointer area, */
	283
3791773c	284	cif->bytes += 16 * wordsize;
63e5e3e0	285
3791773c	286	/* The stack must be 2 word aligned, so round bytes up
63e5e3e0 AG	287	appropriately. */
63e5e3e0 AG	288
3791773c	289	cif->bytes = ALIGN(cif->bytes, 2 * wordsize);
63e5e3e0 AG	290
	291	/* Set the return type flag */
	292	switch (cif->rtype->type)
	293	{
	294	case FFI_TYPE_VOID:
63e5e3e0	295	case FFI_TYPE_FLOAT:
3791773c JJ	296	case FFI_TYPE_DOUBLE:
	297	#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
	298	case FFI_TYPE_LONGDOUBLE:
	299	#endif
	300	cif->flags = cif->rtype->type;
63e5e3e0 AG	301	break;
63e5e3e0 AG	302
3791773c JJ	303	case FFI_TYPE_STRUCT:
	304	if (cif->abi == FFI_V9 && cif->rtype->size > 32)
	305	cif->flags = FFI_TYPE_VOID;
	306	else
	307	cif->flags = FFI_TYPE_STRUCT;
63e5e3e0 AG	308	break;
63e5e3e0 AG	309
3791773c JJ	310	case FFI_TYPE_SINT64:
	311	case FFI_TYPE_UINT64:
	312	if (cif->abi != FFI_V9)
	313	{
	314	cif->flags = FFI_TYPE_SINT64;
	315	break;
	316	}
	317	/* FALLTHROUGH */
63e5e3e0 AG	318	default:
	319	cif->flags = FFI_TYPE_INT;
	320	break;
	321	}
63e5e3e0 AG	322	return FFI_OK;
	323	}
	324
0ce78f01	325	int ffi_v9_layout_struct(ffi_type arg, int off, char ret, char intg, char flt)
3791773c JJ	326	{
	327	ffi_type **ptr = &arg->elements[0];
	328
	329	while (*ptr != NULL)
	330	{
	331	if (off & ((*ptr)->alignment - 1))
	332	off = ALIGN(off, (*ptr)->alignment);
	333
	334	switch ((*ptr)->type)
	335	{
	336	case FFI_TYPE_STRUCT:
0ce78f01 EB	337	off = ffi_v9_layout_struct(*ptr, off, ret, intg, flt);
0ce78f01 EB	338	off = ALIGN(off, FFI_SIZEOF_ARG);
3791773c JJ	339	break;
	340	case FFI_TYPE_FLOAT:
	341	case FFI_TYPE_DOUBLE:
	342	#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
	343	case FFI_TYPE_LONGDOUBLE:
	344	#endif
0ce78f01	345	memmove(ret + off, flt + off, (*ptr)->size);
3791773c JJ	346	off += (*ptr)->size;
	347	break;
	348	default:
0ce78f01	349	memmove(ret + off, intg + off, (*ptr)->size);
3791773c JJ	350	off += (*ptr)->size;
	351	break;
	352	}
	353	ptr++;
	354	}
	355	return off;
	356	}
	357
0ce78f01 EB	358
	359	#ifdef SPARC64
	360	extern int ffi_call_v9(void , extended_cif , unsigned,
63e5e3e0	361	unsigned, unsigned , void (fn)());
0ce78f01 EB	362	#else
0ce78f01 EB	363	extern int ffi_call_v8(void , extended_cif , unsigned,
3791773c	364	unsigned, unsigned , void (fn)());
0ce78f01	365	#endif
63e5e3e0 AG	366
	367	void ffi_call(ffi_cif cif, void (fn)(), void rvalue, void *avalue)
	368	{
	369	extended_cif ecif;
3791773c	370	void *rval = rvalue;
63e5e3e0 AG	371
	372	ecif.cif = cif;
	373	ecif.avalue = avalue;
3791773c	374
63e5e3e0 AG	375	/* If the return value is a struct and we don't have a return */
63e5e3e0 AG	376	/* value address then we need to make one */
3791773c JJ	377
	378	ecif.rvalue = rvalue;
	379	if (cif->rtype->type == FFI_TYPE_STRUCT)
	380	{
	381	if (cif->rtype->size <= 32)
	382	rval = alloca(64);
	383	else
	384	{
	385	rval = NULL;
	386	if (rvalue == NULL)
	387	ecif.rvalue = alloca(cif->rtype->size);
	388	}
	389	}
	390
63e5e3e0 AG	391	switch (cif->abi)
	392	{
	393	case FFI_V8:
3791773c JJ	394	#ifdef SPARC64
	395	/* We don't yet support calling 32bit code from 64bit */
	396	FFI_ASSERT(0);
	397	#else
0ce78f01	398	ffi_call_v8(ffi_prep_args_v8, &ecif, cif->bytes,
63e5e3e0	399	cif->flags, rvalue, fn);
3791773c JJ	400	#endif
	401	break;
	402	case FFI_V9:
	403	#ifdef SPARC64
0ce78f01	404	ffi_call_v9(ffi_prep_args_v9, &ecif, cif->bytes,
3791773c JJ	405	cif->flags, rval, fn);
3791773c JJ	406	if (rvalue && rval && cif->rtype->type == FFI_TYPE_STRUCT)
0ce78f01	407	ffi_v9_layout_struct(cif->rtype, 0, (char )rvalue, (char )rval, ((char *)rval)+32);
3791773c JJ	408	#else
	409	/* And vice versa */
	410	FFI_ASSERT(0);
	411	#endif
63e5e3e0 AG	412	break;
	413	default:
	414	FFI_ASSERT(0);
	415	break;
	416	}
3791773c	417
63e5e3e0	418	}
c75c7793	419
0ce78f01 EB	420
	421	#ifdef SPARC64
	422	extern void ffi_closure_v9(void);
	423	#else
	424	extern void ffi_closure_v8(void);
	425	#endif
	426
c75c7793 JS	427	ffi_status
	428	ffi_prep_closure (ffi_closure* closure,
	429	ffi_cif* cif,
	430	void (fun)(ffi_cif, void, void, void),
	431	void *user_data)
	432	{
	433	unsigned int tramp = (unsigned int ) &closure->tramp[0];
	434	unsigned long fn;
c75c7793 JS	435	#ifdef SPARC64
	436	/* Trampoline address is equal to the closure address. We take advantage
	437	of that to reduce the trampoline size by 8 bytes. */
	438	FFI_ASSERT (cif->abi == FFI_V9);
	439	fn = (unsigned long) ffi_closure_v9;
	440	tramp[0] = 0x83414000; /* rd %pc, %g1 */
	441	tramp[1] = 0xca586010; /* ldx [%g1+16], %g5 */
	442	tramp[2] = 0x81c14000; /* jmp %g5 */
	443	tramp[3] = 0x01000000; /* nop */
	444	((unsigned long ) &tramp[4]) = fn;
	445	#else
0ce78f01	446	unsigned long ctx = (unsigned long) closure;
c75c7793 JS	447	FFI_ASSERT (cif->abi == FFI_V8);
	448	fn = (unsigned long) ffi_closure_v8;
	449	tramp[0] = 0x03000000 \| fn >> 10; /* sethi %hi(fn), %g1 */
	450	tramp[1] = 0x05000000 \| ctx >> 10; /* sethi %hi(ctx), %g2 */
	451	tramp[2] = 0x81c06000 \| (fn & 0x3ff); /* jmp %g1+%lo(fn) */
	452	tramp[3] = 0x8410a000 \| (ctx & 0x3ff);/* or %g2, %lo(ctx) */
	453	#endif
	454
	455	closure->cif = cif;
	456	closure->fun = fun;
	457	closure->user_data = user_data;
	458
	459	/* Flush the Icache. FIXME: alignment isn't certain, assume 8 bytes */
	460	#ifdef SPARC64
	461	asm volatile ("flush %0" : : "r" (closure) : "memory");
	462	asm volatile ("flush %0" : : "r" (((char *) closure) + 8) : "memory");
	463	#else
	464	asm volatile ("iflush %0" : : "r" (closure) : "memory");
	465	asm volatile ("iflush %0" : : "r" (((char *) closure) + 8) : "memory");
	466	#endif
	467
	468	return FFI_OK;
	469	}
	470
	471	int
0ce78f01 EB	472	ffi_closure_sparc_inner_v8(ffi_closure *closure,
0ce78f01 EB	473	void rvalue, unsigned long gpr)
c75c7793 JS	474	{
c75c7793 JS	475	ffi_cif *cif;
c75c7793	476	ffi_type **arg_types;
0ce78f01 EB	477	void **avalue;
0ce78f01 EB	478	int i, argn;
c75c7793 JS	479
c75c7793 JS	480	cif = closure->cif;
0ce78f01	481	arg_types = cif->arg_types;
c75c7793 JS	482	avalue = alloca(cif->nargs * sizeof(void *));
c75c7793 JS	483
0ce78f01 EB	484	/* Copy the caller's structure return address so that the closure
	485	returns the data directly to the caller. */
	486	if (cif->flags == FFI_TYPE_STRUCT
	487	#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
	488	\|\| cif->flags == FFI_TYPE_LONGDOUBLE
	489	#endif
	490	)
	491	rvalue = (void *) gpr[0];
	492
	493	/* Always skip the structure return address. */
	494	argn = 1;
	495
	496	/* Grab the addresses of the arguments from the stack frame. */
	497	for (i = 0; i < cif->nargs; i++)
	498	{
	499	if (arg_types[i]->type == FFI_TYPE_STRUCT
	500	#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
	501	\|\| arg_types[i]->type == FFI_TYPE_LONGDOUBLE
	502	#endif
	503	)
	504	{
	505	/* Straight copy of invisible reference. */
	506	avalue[i] = (void *)gpr[argn++];
	507	}
	508	else
	509	{
	510	/* Always right-justify. */
	511	argn += ALIGN(arg_types[i]->size, FFI_SIZEOF_ARG) / FFI_SIZEOF_ARG;
	512	avalue[i] = ((char *) &gpr[argn]) - arg_types[i]->size;
	513	}
	514	}
c75c7793	515
0ce78f01 EB	516	/* Invoke the closure. */
	517	(closure->fun) (cif, rvalue, avalue, closure->user_data);
	518
	519	/* Tell ffi_closure_sparc how to perform return type promotions. */
	520	return cif->rtype->type;
	521	}
	522
	523	int
	524	ffi_closure_sparc_inner_v9(ffi_closure *closure,
	525	void rvalue, unsigned long gpr, double *fpr)
	526	{
	527	ffi_cif *cif;
	528	ffi_type **arg_types;
	529	void **avalue;
	530	int i, argn, fp_slot_max;
	531
	532	cif = closure->cif;
	533	arg_types = cif->arg_types;
	534	avalue = alloca(cif->nargs * sizeof(void *));
	535
	536	/* Copy the caller's structure return address so that the closure
c75c7793	537	returns the data directly to the caller. */
0ce78f01 EB	538	if (cif->flags == FFI_TYPE_VOID
0ce78f01 EB	539	&& cif->rtype->type == FFI_TYPE_STRUCT)
c75c7793 JS	540	{
c75c7793 JS	541	rvalue = (void *) gpr[0];
0ce78f01	542	/* Skip the structure return address. */
c75c7793 JS	543	argn = 1;
c75c7793 JS	544	}
0ce78f01 EB	545	else
	546	argn = 0;
	547
	548	fp_slot_max = 16 - argn;
c75c7793	549
c75c7793	550	/* Grab the addresses of the arguments from the stack frame. */
0ce78f01	551	for (i = 0; i < cif->nargs; i++)
c75c7793	552	{
0ce78f01 EB	553	if (arg_types[i]->type == FFI_TYPE_STRUCT)
	554	{
	555	if (arg_types[i]->size > 16)
	556	{
	557	/* Straight copy of invisible reference. */
	558	avalue[i] = (void *)gpr[argn++];
	559	}
	560	else
	561	{
	562	/* Left-justify. */
	563	ffi_v9_layout_struct(arg_types[i],
	564	0,
	565	(char *) &gpr[argn],
	566	(char *) &gpr[argn],
	567	(char *) &fpr[argn]);
	568	avalue[i] = &gpr[argn];
	569	argn += ALIGN(arg_types[i]->size, FFI_SIZEOF_ARG) / FFI_SIZEOF_ARG;
	570	}
	571	}
	572	else
	573	{
	574	/* Right-justify. */
	575	argn += ALIGN(arg_types[i]->size, FFI_SIZEOF_ARG) / FFI_SIZEOF_ARG;
c75c7793	576
0ce78f01 EB	577	if (i < fp_slot_max
	578	&& (arg_types[i]->type == FFI_TYPE_FLOAT
	579	\|\| arg_types[i]->type == FFI_TYPE_DOUBLE
c75c7793	580	#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
0ce78f01	581	\|\| arg_types[i]->type == FFI_TYPE_LONGDOUBLE
c75c7793	582	#endif
0ce78f01 EB	583	))
	584	avalue[i] = ((char *) &fpr[argn]) - arg_types[i]->size;
	585	else
	586	avalue[i] = ((char *) &gpr[argn]) - arg_types[i]->size;
	587	}
c75c7793 JS	588	}
	589
	590	/* Invoke the closure. */
	591	(closure->fun) (cif, rvalue, avalue, closure->user_data);
	592
	593	/* Tell ffi_closure_sparc how to perform return type promotions. */
	594	return cif->rtype->type;
	595	}