Initial import package libffi: A portable foreign function interface libraryHEAD2.0_alphamaster2.0alpha1.0_post

1 files changed, 716 insertions, 0 deletions

diff --git a/src/sh/ffi.c b/src/sh/ffi.c
new file mode 100644
index 0000000..69bd025
--- /dev/null
+++ b/src/sh/ffi.c
@@ -0,0 +1,716 @@
+/* -----------------------------------------------------------------------
+   ffi.c - Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Kaz Kojima
+           Copyright (c) 2008 Red Hat, Inc.
+   
+   SuperH 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 THE AUTHORS OR COPYRIGHT
+   HOLDERS 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>
+
+#define NGREGARG 4
+#if defined(__SH4__)
+#define NFREGARG 8
+#endif
+
+#if defined(__HITACHI__)
+#define STRUCT_VALUE_ADDRESS_WITH_ARG 1
+#else
+#define STRUCT_VALUE_ADDRESS_WITH_ARG 0
+#endif
+
+/* If the structure has essentialy an unique element, return its type.  */
+static int
+simple_type (ffi_type *arg)
+{
+  if (arg->type != FFI_TYPE_STRUCT)
+    return arg->type;
+  else if (arg->elements[1])
+    return FFI_TYPE_STRUCT;
+
+  return simple_type (arg->elements[0]);
+}
+
+static int
+return_type (ffi_type *arg)
+{
+  unsigned short type;
+
+  if (arg->type != FFI_TYPE_STRUCT)
+    return arg->type;
+
+  type = simple_type (arg->elements[0]);
+  if (! arg->elements[1])
+    {
+      switch (type)
+	{
+	case FFI_TYPE_SINT8:
+	case FFI_TYPE_UINT8:
+	case FFI_TYPE_SINT16:
+	case FFI_TYPE_UINT16:
+	case FFI_TYPE_SINT32:
+	case FFI_TYPE_UINT32:
+	  return FFI_TYPE_INT;
+
+	default:
+	  return type;
+	}
+    }
+
+  /* gcc uses r0/r1 pair for some kind of structures.  */
+  if (arg->size <= 2 * sizeof (int))
+    {
+      int i = 0;
+      ffi_type *e;
+
+      while ((e = arg->elements[i++]))
+	{
+	  type = simple_type (e);
+	  switch (type)
+	    {
+	    case FFI_TYPE_SINT32:
+	    case FFI_TYPE_UINT32:
+	    case FFI_TYPE_INT:
+	    case FFI_TYPE_FLOAT:
+	      return FFI_TYPE_UINT64;
+
+	    default:
+	      break;
+	    }
+	}
+    }
+
+  return FFI_TYPE_STRUCT;
+}
+
+/* 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)
+{
+  register unsigned int i;
+  register int tmp;
+  register unsigned int avn;
+  register void **p_argv;
+  register char *argp;
+  register ffi_type **p_arg;
+  int greg, ireg;
+#if defined(__SH4__)
+  int freg = 0;
+#endif
+
+  tmp = 0;
+  argp = stack;
+
+  if (return_type (ecif->cif->rtype) == FFI_TYPE_STRUCT)
+    {
+      *(void **) argp = ecif->rvalue;
+      argp += 4;
+      ireg = STRUCT_VALUE_ADDRESS_WITH_ARG ? 1 : 0;
+    }
+  else
+    ireg = 0;
+
+  /* Set arguments for registers.  */
+  greg = ireg;
+  avn = ecif->cif->nargs;
+  p_argv = ecif->avalue;
+
+  for (i = 0, p_arg = ecif->cif->arg_types; i < avn; i++, p_arg++, p_argv++)
+    {
+      size_t z;
+
+      z = (*p_arg)->size;
+      if (z < sizeof(int))
+	{
+	  if (greg++ >= NGREGARG)
+	    continue;
+
+	  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:
+	      *(unsigned int *) argp = (unsigned int)*(UINT32 *)(* p_argv);
+	      break;
+
+	    default:
+	      FFI_ASSERT(0);
+	    }
+	  argp += z;
+	}
+      else if (z == sizeof(int))
+	{
+#if defined(__SH4__)
+	  if ((*p_arg)->type == FFI_TYPE_FLOAT)
+	    {
+	      if (freg++ >= NFREGARG)
+		continue;
+	    }
+	  else
+#endif
+	    {
+	      if (greg++ >= NGREGARG)
+		continue;
+	    }
+	  *(unsigned int *) argp = (unsigned int)*(UINT32 *)(* p_argv);
+	  argp += z;
+	}
+#if defined(__SH4__)
+      else if ((*p_arg)->type == FFI_TYPE_DOUBLE)
+	{
+	  if (freg + 1 >= NFREGARG)
+	    continue;
+	  freg = (freg + 1) & ~1;
+	  freg += 2;
+	  memcpy (argp, *p_argv, z);
+	  argp += z;
+	}
+#endif
+      else
+	{
+	  int n = (z + sizeof (int) - 1) / sizeof (int);
+#if defined(__SH4__)
+	  if (greg + n - 1 >= NGREGARG)
+	    continue;
+#else
+	  if (greg >= NGREGARG)
+	    continue;
+#endif
+	  greg += n;
+	  memcpy (argp, *p_argv, z);
+	  argp += n * sizeof (int);
+	}
+    }
+
+  /* Set arguments on stack.  */
+  greg = ireg;
+#if defined(__SH4__)
+  freg = 0;
+#endif
+  p_argv = ecif->avalue;
+
+  for (i = 0, p_arg = ecif->cif->arg_types; i < avn; i++, p_arg++, p_argv++)
+    {
+      size_t z;
+
+      z = (*p_arg)->size;
+      if (z < sizeof(int))
+	{
+	  if (greg++ < NGREGARG)
+	    continue;
+
+	  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:
+	      *(unsigned int *) argp = (unsigned int)*(UINT32 *)(* p_argv);
+	      break;
+
+	    default:
+	      FFI_ASSERT(0);
+	    }
+	  argp += z;
+	}
+      else if (z == sizeof(int))
+	{
+#if defined(__SH4__)
+	  if ((*p_arg)->type == FFI_TYPE_FLOAT)
+	    {
+	      if (freg++ < NFREGARG)
+		continue;
+	    }
+	  else
+#endif
+	    {
+	      if (greg++ < NGREGARG)
+		continue;
+	    }
+	  *(unsigned int *) argp = (unsigned int)*(UINT32 *)(* p_argv);
+	  argp += z;
+	}
+#if defined(__SH4__)
+      else if ((*p_arg)->type == FFI_TYPE_DOUBLE)
+	{
+	  if (freg + 1 < NFREGARG)
+	    {
+	      freg = (freg + 1) & ~1;
+	      freg += 2;
+	      continue;
+	    }
+	  memcpy (argp, *p_argv, z);
+	  argp += z;
+	}
+#endif
+      else
+	{
+	  int n = (z + sizeof (int) - 1) / sizeof (int);
+	  if (greg + n - 1 < NGREGARG)
+	    {
+	      greg += n;
+	      continue;
+	    }
+#if (! defined(__SH4__))
+	  else if (greg < NGREGARG)
+	    {
+	      greg = NGREGARG;
+	      continue;
+	    }
+#endif
+	  memcpy (argp, *p_argv, z);
+	  argp += n * sizeof (int);
+	}
+    }
+
+  return;
+}
+
+/* Perform machine dependent cif processing */
+ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
+{
+  int i, j;
+  int size, type;
+  int n, m;
+  int greg;
+#if defined(__SH4__)
+  int freg = 0;
+#endif
+
+  cif->flags = 0;
+
+  greg = ((return_type (cif->rtype) == FFI_TYPE_STRUCT) &&
+	  STRUCT_VALUE_ADDRESS_WITH_ARG) ? 1 : 0;
+
+#if defined(__SH4__)
+  for (i = j = 0; i < cif->nargs && j < 12; i++)
+    {
+      type = (cif->arg_types)[i]->type;
+      switch (type)
+	{
+	case FFI_TYPE_FLOAT:
+	  if (freg >= NFREGARG)
+	    continue;
+	  freg++;
+	  cif->flags += ((cif->arg_types)[i]->type) << (2 * j);
+	  j++;
+	  break;
+
+	case FFI_TYPE_DOUBLE:
+	  if ((freg + 1) >= NFREGARG)
+	    continue;
+	  freg = (freg + 1) & ~1;
+	  freg += 2;
+	  cif->flags += ((cif->arg_types)[i]->type) << (2 * j);
+	  j++;
+	  break;
+	      
+	default:
+	  size = (cif->arg_types)[i]->size;
+	  n = (size + sizeof (int) - 1) / sizeof (int);
+	  if (greg + n - 1 >= NGREGARG)
+		continue;
+	  greg += n;
+	  for (m = 0; m < n; m++)
+	    cif->flags += FFI_TYPE_INT << (2 * j++);
+	  break;
+	}
+    }
+#else
+  for (i = j = 0; i < cif->nargs && j < 4; i++)
+    {
+      size = (cif->arg_types)[i]->size;
+      n = (size + sizeof (int) - 1) / sizeof (int);
+      if (greg >= NGREGARG)
+	continue;
+      else if (greg + n - 1 >= NGREGARG)
+	n = NGREGARG - greg;
+      greg += n;
+      for (m = 0; m < n; m++)
+        cif->flags += FFI_TYPE_INT << (2 * j++);
+    }
+#endif
+
+  /* Set the return type flag */
+  switch (cif->rtype->type)
+    {
+    case FFI_TYPE_STRUCT:
+      cif->flags += (unsigned) (return_type (cif->rtype)) << 24;
+      break;
+
+    case FFI_TYPE_VOID:
+    case FFI_TYPE_FLOAT:
+    case FFI_TYPE_DOUBLE:
+    case FFI_TYPE_SINT64:
+    case FFI_TYPE_UINT64:
+      cif->flags += (unsigned) cif->rtype->type << 24;
+      break;
+
+    default:
+      cif->flags += FFI_TYPE_INT << 24;
+      break;
+    }
+
+  return FFI_OK;
+}
+
+extern void ffi_call_SYSV(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;
+  UINT64 trvalue;
+
+  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 (cif->rtype->type == FFI_TYPE_STRUCT
+      && return_type (cif->rtype) != FFI_TYPE_STRUCT)
+    ecif.rvalue = &trvalue;
+  else if ((rvalue == NULL) && 
+      (cif->rtype->type == FFI_TYPE_STRUCT))
+    {
+      ecif.rvalue = alloca(cif->rtype->size);
+    }
+  else
+    ecif.rvalue = rvalue;
+
+  switch (cif->abi) 
+    {
+    case FFI_SYSV:
+      ffi_call_SYSV(ffi_prep_args, &ecif, cif->bytes, cif->flags, ecif.rvalue,
+		    fn);
+      break;
+    default:
+      FFI_ASSERT(0);
+      break;
+    }
+
+  if (rvalue
+      && cif->rtype->type == FFI_TYPE_STRUCT
+      && return_type (cif->rtype) != FFI_TYPE_STRUCT)
+    memcpy (rvalue, &trvalue, cif->rtype->size);
+}
+
+extern void ffi_closure_SYSV (void);
+#if defined(__SH4__)
+extern void __ic_invalidate (void *line);
+#endif
+
+ffi_status
+ffi_prep_closure_loc (ffi_closure* closure,
+		      ffi_cif* cif,
+		      void (*fun)(ffi_cif*, void*, void**, void*),
+		      void *user_data,
+		      void *codeloc)
+{
+  unsigned int *tramp;
+  unsigned int insn;
+
+  FFI_ASSERT (cif->abi == FFI_GCC_SYSV);
+
+  tramp = (unsigned int *) &closure->tramp[0];
+  /* Set T bit if the function returns a struct pointed with R2.  */
+  insn = (return_type (cif->rtype) == FFI_TYPE_STRUCT
+	  ? 0x0018 /* sett */
+	  : 0x0008 /* clrt */);
+
+#ifdef __LITTLE_ENDIAN__
+  tramp[0] = 0xd301d102;
+  tramp[1] = 0x0000412b | (insn << 16);
+#else
+  tramp[0] = 0xd102d301;
+  tramp[1] = 0x412b0000 | insn;
+#endif
+  *(void **) &tramp[2] = (void *)codeloc;          /* ctx */
+  *(void **) &tramp[3] = (void *)ffi_closure_SYSV; /* funaddr */
+
+  closure->cif = cif;
+  closure->fun = fun;
+  closure->user_data = user_data;
+
+#if defined(__SH4__)
+  /* Flush the icache.  */
+  __ic_invalidate(codeloc);
+#endif
+
+  return FFI_OK;
+}
+
+/* Basically the trampoline invokes ffi_closure_SYSV, and on 
+ * entry, r3 holds the address of the closure.
+ * After storing the registers that could possibly contain
+ * parameters to be passed into the stack frame and setting
+ * up space for a return value, ffi_closure_SYSV invokes the 
+ * following helper function to do most of the work.
+ */
+
+#ifdef __LITTLE_ENDIAN__
+#define OFS_INT8	0
+#define OFS_INT16	0
+#else
+#define OFS_INT8	3
+#define OFS_INT16	2
+#endif
+
+int
+ffi_closure_helper_SYSV (ffi_closure *closure, void *rvalue, 
+			 unsigned long *pgr, unsigned long *pfr, 
+			 unsigned long *pst)
+{
+  void **avalue;
+  ffi_type **p_arg;
+  int i, avn;
+  int ireg, greg = 0;
+#if defined(__SH4__)
+  int freg = 0;
+#endif
+  ffi_cif *cif; 
+
+  cif = closure->cif;
+  avalue = alloca(cif->nargs * sizeof(void *));
+
+  /* Copy the caller's structure return value address so that the closure
+     returns the data directly to the caller.  */
+  if (cif->rtype->type == FFI_TYPE_STRUCT && STRUCT_VALUE_ADDRESS_WITH_ARG)
+    {
+      rvalue = (void *) *pgr++;
+      ireg = 1;
+    }
+  else
+    ireg = 0;
+
+  cif = closure->cif;
+  greg = ireg;
+  avn = cif->nargs;
+
+  /* Grab the addresses of the arguments from the stack frame.  */
+  for (i = 0, p_arg = cif->arg_types; i < avn; i++, p_arg++)
+    {
+      size_t z;
+
+      z = (*p_arg)->size;
+      if (z < sizeof(int))
+	{
+	  if (greg++ >= NGREGARG)
+	    continue;
+
+	  z = sizeof(int);
+	  switch ((*p_arg)->type)
+	    {
+	    case FFI_TYPE_SINT8:
+	    case FFI_TYPE_UINT8:
+	      avalue[i] = (((char *)pgr) + OFS_INT8);
+	      break;
+  
+	    case FFI_TYPE_SINT16:
+	    case FFI_TYPE_UINT16:
+	      avalue[i] = (((char *)pgr) + OFS_INT16);
+	      break;
+  
+	    case FFI_TYPE_STRUCT:
+	      avalue[i] = pgr;
+	      break;
+
+	    default:
+	      FFI_ASSERT(0);
+	    }
+	  pgr++;
+	}
+      else if (z == sizeof(int))
+	{
+#if defined(__SH4__)
+	  if ((*p_arg)->type == FFI_TYPE_FLOAT)
+	    {
+	      if (freg++ >= NFREGARG)
+		continue;
+	      avalue[i] = pfr;
+	      pfr++;
+	    }
+	  else
+#endif
+	    {
+	      if (greg++ >= NGREGARG)
+		continue;
+	      avalue[i] = pgr;
+	      pgr++;
+	    }
+	}
+#if defined(__SH4__)
+      else if ((*p_arg)->type == FFI_TYPE_DOUBLE)
+	{
+	  if (freg + 1 >= NFREGARG)
+	    continue;
+	  if (freg & 1)
+	    pfr++;
+	  freg = (freg + 1) & ~1;
+	  freg += 2;
+	  avalue[i] = pfr;
+	  pfr += 2;
+	}
+#endif
+      else
+	{
+	  int n = (z + sizeof (int) - 1) / sizeof (int);
+#if defined(__SH4__)
+	  if (greg + n - 1 >= NGREGARG)
+	    continue;
+#else
+	  if (greg >= NGREGARG)
+	    continue;
+#endif
+	  greg += n;
+	  avalue[i] = pgr;
+	  pgr += n;
+	}
+    }
+
+  greg = ireg;
+#if defined(__SH4__)
+  freg = 0;
+#endif
+
+  for (i = 0, p_arg = cif->arg_types; i < avn; i++, p_arg++)
+    {
+      size_t z;
+
+      z = (*p_arg)->size;
+      if (z < sizeof(int))
+	{
+	  if (greg++ < NGREGARG)
+	    continue;
+
+	  z = sizeof(int);
+	  switch ((*p_arg)->type)
+	    {
+	    case FFI_TYPE_SINT8:
+	    case FFI_TYPE_UINT8:
+	      avalue[i] = (((char *)pst) + OFS_INT8);
+	      break;
+  
+	    case FFI_TYPE_SINT16:
+	    case FFI_TYPE_UINT16:
+	      avalue[i] = (((char *)pst) + OFS_INT16);
+	      break;
+  
+	    case FFI_TYPE_STRUCT:
+	      avalue[i] = pst;
+	      break;
+
+	    default:
+	      FFI_ASSERT(0);
+	    }
+	  pst++;
+	}
+      else if (z == sizeof(int))
+	{
+#if defined(__SH4__)
+	  if ((*p_arg)->type == FFI_TYPE_FLOAT)
+	    {
+	      if (freg++ < NFREGARG)
+		continue;
+	    }
+	  else
+#endif
+	    {
+	      if (greg++ < NGREGARG)
+		continue;
+	    }
+	  avalue[i] = pst;
+	  pst++;
+	}
+#if defined(__SH4__)
+      else if ((*p_arg)->type == FFI_TYPE_DOUBLE)
+	{
+	  if (freg + 1 < NFREGARG)
+	    {
+	      freg = (freg + 1) & ~1;
+	      freg += 2;
+	      continue;
+	    }
+	  avalue[i] = pst;
+	  pst += 2;
+	}
+#endif
+      else
+	{
+	  int n = (z + sizeof (int) - 1) / sizeof (int);
+	  if (greg + n - 1 < NGREGARG)
+	    {
+	      greg += n;
+	      continue;
+	    }
+#if (! defined(__SH4__))
+	  else if (greg < NGREGARG)
+	    {
+	      greg += n;
+	      pst += greg - NGREGARG;
+	      continue;
+	    }
+#endif
+	  avalue[i] = pst;
+	  pst += n;
+	}
+    }
+
+  (closure->fun) (cif, rvalue, avalue, closure->user_data);
+
+  /* Tell ffi_closure_SYSV how to perform return type promotions.  */
+  return return_type (cif->rtype);
+}