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

3 files changed, 1274 insertions, 0 deletions

diff --git a/src/s390/ffi.c b/src/s390/ffi.c
new file mode 100644
index 0000000..ca2675b
--- /dev/null
+++ b/src/s390/ffi.c
@@ -0,0 +1,780 @@
+/* -----------------------------------------------------------------------
+   ffi.c - Copyright (c) 2000, 2007 Software AG
+           Copyright (c) 2008 Red Hat, Inc
+ 
+   S390 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 AUTHOR 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.
+   ----------------------------------------------------------------------- */
+/*====================================================================*/
+/*                          Includes                                  */
+/*                          --------                                  */
+/*====================================================================*/
+ 
+#include <ffi.h>
+#include <ffi_common.h>
+ 
+#include <stdlib.h>
+#include <stdio.h>
+ 
+/*====================== End of Includes =============================*/
+ 
+/*====================================================================*/
+/*                           Defines                                  */
+/*                           -------                                  */
+/*====================================================================*/
+
+/* Maximum number of GPRs available for argument passing.  */ 
+#define MAX_GPRARGS 5
+
+/* Maximum number of FPRs available for argument passing.  */ 
+#ifdef __s390x__
+#define MAX_FPRARGS 4
+#else
+#define MAX_FPRARGS 2
+#endif
+
+/* Round to multiple of 16.  */
+#define ROUND_SIZE(size) (((size) + 15) & ~15)
+
+/* If these values change, sysv.S must be adapted!  */
+#define FFI390_RET_VOID		0
+#define FFI390_RET_STRUCT	1
+#define FFI390_RET_FLOAT	2
+#define FFI390_RET_DOUBLE	3
+#define FFI390_RET_INT32	4
+#define FFI390_RET_INT64	5
+
+/*===================== End of Defines ===============================*/
+ 
+/*====================================================================*/
+/*                          Prototypes                                */
+/*                          ----------                                */
+/*====================================================================*/
+ 
+static void ffi_prep_args (unsigned char *, extended_cif *);
+void
+#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
+__attribute__ ((visibility ("hidden")))
+#endif
+ffi_closure_helper_SYSV (ffi_closure *, unsigned long *, 
+			 unsigned long long *, unsigned long *);
+
+/*====================== End of Prototypes ===========================*/
+ 
+/*====================================================================*/
+/*                          Externals                                 */
+/*                          ---------                                 */
+/*====================================================================*/
+ 
+extern void ffi_call_SYSV(unsigned,
+			  extended_cif *,
+			  void (*)(unsigned char *, extended_cif *),
+			  unsigned,
+			  void *,
+			  void (*fn)(void));
+
+extern void ffi_closure_SYSV(void);
+ 
+/*====================== End of Externals ============================*/
+ 
+/*====================================================================*/
+/*                                                                    */
+/* Name     - ffi_check_struct_type.                                  */
+/*                                                                    */
+/* Function - Determine if a structure can be passed within a         */
+/*            general purpose or floating point register.             */
+/*                                                                    */
+/*====================================================================*/
+ 
+static int
+ffi_check_struct_type (ffi_type *arg)
+{
+  size_t size = arg->size;
+
+  /* If the struct has just one element, look at that element
+     to find out whether to consider the struct as floating point.  */
+  while (arg->type == FFI_TYPE_STRUCT 
+         && arg->elements[0] && !arg->elements[1])
+    arg = arg->elements[0];
+
+  /* Structs of size 1, 2, 4, and 8 are passed in registers,
+     just like the corresponding int/float types.  */
+  switch (size)
+    {
+      case 1:
+        return FFI_TYPE_UINT8;
+
+      case 2:
+        return FFI_TYPE_UINT16;
+
+      case 4:
+	if (arg->type == FFI_TYPE_FLOAT)
+          return FFI_TYPE_FLOAT;
+	else
+	  return FFI_TYPE_UINT32;
+
+      case 8:
+	if (arg->type == FFI_TYPE_DOUBLE)
+          return FFI_TYPE_DOUBLE;
+	else
+	  return FFI_TYPE_UINT64;
+
+      default:
+	break;
+    }
+
+  /* Other structs are passed via a pointer to the data.  */
+  return FFI_TYPE_POINTER;
+}
+ 
+/*======================== End of Routine ============================*/
+ 
+/*====================================================================*/
+/*                                                                    */
+/* Name     - ffi_prep_args.                                          */
+/*                                                                    */
+/* Function - Prepare parameters for call to function.                */
+/*                                                                    */
+/* ffi_prep_args is called by the assembly routine once stack space   */
+/* has been allocated for the function's arguments.                   */
+/*                                                                    */
+/*====================================================================*/
+ 
+static void
+ffi_prep_args (unsigned char *stack, extended_cif *ecif)
+{
+  /* The stack space will be filled with those areas:
+
+	FPR argument register save area     (highest addresses)
+	GPR argument register save area
+	temporary struct copies
+	overflow argument area              (lowest addresses)
+
+     We set up the following pointers:
+
+        p_fpr: bottom of the FPR area (growing upwards)
+	p_gpr: bottom of the GPR area (growing upwards)
+	p_ov: bottom of the overflow area (growing upwards)
+	p_struct: top of the struct copy area (growing downwards)
+
+     All areas are kept aligned to twice the word size.  */
+
+  int gpr_off = ecif->cif->bytes;
+  int fpr_off = gpr_off + ROUND_SIZE (MAX_GPRARGS * sizeof (long));
+
+  unsigned long long *p_fpr = (unsigned long long *)(stack + fpr_off);
+  unsigned long *p_gpr = (unsigned long *)(stack + gpr_off);
+  unsigned char *p_struct = (unsigned char *)p_gpr;
+  unsigned long *p_ov = (unsigned long *)stack;
+
+  int n_fpr = 0;
+  int n_gpr = 0;
+  int n_ov = 0;
+
+  ffi_type **ptr;
+  void **p_argv = ecif->avalue;
+  int i;
+ 
+  /* If we returning a structure then we set the first parameter register
+     to the address of where we are returning this structure.  */
+
+  if (ecif->cif->flags == FFI390_RET_STRUCT)
+    p_gpr[n_gpr++] = (unsigned long) ecif->rvalue;
+
+  /* Now for the arguments.  */
+ 
+  for (ptr = ecif->cif->arg_types, i = ecif->cif->nargs;
+       i > 0;
+       i--, ptr++, p_argv++)
+    {
+      void *arg = *p_argv;
+      int type = (*ptr)->type;
+
+#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
+      /* 16-byte long double is passed like a struct.  */
+      if (type == FFI_TYPE_LONGDOUBLE)
+	type = FFI_TYPE_STRUCT;
+#endif
+
+      /* Check how a structure type is passed.  */
+      if (type == FFI_TYPE_STRUCT)
+	{
+	  type = ffi_check_struct_type (*ptr);
+
+	  /* If we pass the struct via pointer, copy the data.  */
+	  if (type == FFI_TYPE_POINTER)
+	    {
+	      p_struct -= ROUND_SIZE ((*ptr)->size);
+	      memcpy (p_struct, (char *)arg, (*ptr)->size);
+	      arg = &p_struct;
+	    }
+	}
+
+      /* Now handle all primitive int/pointer/float data types.  */
+      switch (type) 
+	{
+	  case FFI_TYPE_DOUBLE:
+	    if (n_fpr < MAX_FPRARGS)
+	      p_fpr[n_fpr++] = *(unsigned long long *) arg;
+	    else
+#ifdef __s390x__
+	      p_ov[n_ov++] = *(unsigned long *) arg;
+#else
+	      p_ov[n_ov++] = ((unsigned long *) arg)[0],
+	      p_ov[n_ov++] = ((unsigned long *) arg)[1];
+#endif
+	    break;
+	
+	  case FFI_TYPE_FLOAT:
+	    if (n_fpr < MAX_FPRARGS)
+	      p_fpr[n_fpr++] = (long long) *(unsigned int *) arg << 32;
+	    else
+	      p_ov[n_ov++] = *(unsigned int *) arg;
+	    break;
+
+	  case FFI_TYPE_POINTER:
+	    if (n_gpr < MAX_GPRARGS)
+	      p_gpr[n_gpr++] = (unsigned long)*(unsigned char **) arg;
+	    else
+	      p_ov[n_ov++] = (unsigned long)*(unsigned char **) arg;
+	    break;
+ 
+	  case FFI_TYPE_UINT64:
+	  case FFI_TYPE_SINT64:
+#ifdef __s390x__
+	    if (n_gpr < MAX_GPRARGS)
+	      p_gpr[n_gpr++] = *(unsigned long *) arg;
+	    else
+	      p_ov[n_ov++] = *(unsigned long *) arg;
+#else
+	    if (n_gpr == MAX_GPRARGS-1)
+	      n_gpr = MAX_GPRARGS;
+	    if (n_gpr < MAX_GPRARGS)
+	      p_gpr[n_gpr++] = ((unsigned long *) arg)[0],
+	      p_gpr[n_gpr++] = ((unsigned long *) arg)[1];
+	    else
+	      p_ov[n_ov++] = ((unsigned long *) arg)[0],
+	      p_ov[n_ov++] = ((unsigned long *) arg)[1];
+#endif
+	    break;
+ 
+	  case FFI_TYPE_UINT32:
+	    if (n_gpr < MAX_GPRARGS)
+	      p_gpr[n_gpr++] = *(unsigned int *) arg;
+	    else
+	      p_ov[n_ov++] = *(unsigned int *) arg;
+	    break;
+ 
+	  case FFI_TYPE_INT:
+	  case FFI_TYPE_SINT32:
+	    if (n_gpr < MAX_GPRARGS)
+	      p_gpr[n_gpr++] = *(signed int *) arg;
+	    else
+	      p_ov[n_ov++] = *(signed int *) arg;
+	    break;
+ 
+	  case FFI_TYPE_UINT16:
+	    if (n_gpr < MAX_GPRARGS)
+	      p_gpr[n_gpr++] = *(unsigned short *) arg;
+	    else
+	      p_ov[n_ov++] = *(unsigned short *) arg;
+	    break;
+ 
+	  case FFI_TYPE_SINT16:
+	    if (n_gpr < MAX_GPRARGS)
+	      p_gpr[n_gpr++] = *(signed short *) arg;
+	    else
+	      p_ov[n_ov++] = *(signed short *) arg;
+	    break;
+
+	  case FFI_TYPE_UINT8:
+	    if (n_gpr < MAX_GPRARGS)
+	      p_gpr[n_gpr++] = *(unsigned char *) arg;
+	    else
+	      p_ov[n_ov++] = *(unsigned char *) arg;
+	    break;
+ 
+	  case FFI_TYPE_SINT8:
+	    if (n_gpr < MAX_GPRARGS)
+	      p_gpr[n_gpr++] = *(signed char *) arg;
+	    else
+	      p_ov[n_ov++] = *(signed char *) arg;
+	    break;
+ 
+	  default:
+	    FFI_ASSERT (0);
+	    break;
+        }
+    }
+}
+
+/*======================== End of Routine ============================*/
+ 
+/*====================================================================*/
+/*                                                                    */
+/* Name     - ffi_prep_cif_machdep.                                   */
+/*                                                                    */
+/* Function - Perform machine dependent CIF processing.               */
+/*                                                                    */
+/*====================================================================*/
+ 
+ffi_status
+ffi_prep_cif_machdep(ffi_cif *cif)
+{
+  size_t struct_size = 0;
+  int n_gpr = 0;
+  int n_fpr = 0;
+  int n_ov = 0;
+
+  ffi_type **ptr;
+  int i;
+
+  /* Determine return value handling.  */ 
+
+  switch (cif->rtype->type)
+    {
+      /* Void is easy.  */
+      case FFI_TYPE_VOID:
+	cif->flags = FFI390_RET_VOID;
+	break;
+
+      /* Structures are returned via a hidden pointer.  */
+      case FFI_TYPE_STRUCT:
+	cif->flags = FFI390_RET_STRUCT;
+	n_gpr++;  /* We need one GPR to pass the pointer.  */
+	break; 
+
+      /* Floating point values are returned in fpr 0.  */
+      case FFI_TYPE_FLOAT:
+	cif->flags = FFI390_RET_FLOAT;
+	break;
+
+      case FFI_TYPE_DOUBLE:
+	cif->flags = FFI390_RET_DOUBLE;
+	break;
+
+#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
+      case FFI_TYPE_LONGDOUBLE:
+	cif->flags = FFI390_RET_STRUCT;
+	n_gpr++;
+	break;
+#endif
+      /* Integer values are returned in gpr 2 (and gpr 3
+	 for 64-bit values on 31-bit machines).  */
+      case FFI_TYPE_UINT64:
+      case FFI_TYPE_SINT64:
+	cif->flags = FFI390_RET_INT64;
+	break;
+
+      case FFI_TYPE_POINTER:
+      case FFI_TYPE_INT:
+      case FFI_TYPE_UINT32:
+      case FFI_TYPE_SINT32:
+      case FFI_TYPE_UINT16:
+      case FFI_TYPE_SINT16:
+      case FFI_TYPE_UINT8:
+      case FFI_TYPE_SINT8:
+	/* These are to be extended to word size.  */
+#ifdef __s390x__
+	cif->flags = FFI390_RET_INT64;
+#else
+	cif->flags = FFI390_RET_INT32;
+#endif
+	break;
+ 
+      default:
+        FFI_ASSERT (0);
+        break;
+    }
+
+  /* Now for the arguments.  */
+ 
+  for (ptr = cif->arg_types, i = cif->nargs;
+       i > 0;
+       i--, ptr++)
+    {
+      int type = (*ptr)->type;
+
+#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
+      /* 16-byte long double is passed like a struct.  */
+      if (type == FFI_TYPE_LONGDOUBLE)
+	type = FFI_TYPE_STRUCT;
+#endif
+
+      /* Check how a structure type is passed.  */
+      if (type == FFI_TYPE_STRUCT)
+	{
+	  type = ffi_check_struct_type (*ptr);
+
+	  /* If we pass the struct via pointer, we must reserve space
+	     to copy its data for proper call-by-value semantics.  */
+	  if (type == FFI_TYPE_POINTER)
+	    struct_size += ROUND_SIZE ((*ptr)->size);
+	}
+
+      /* Now handle all primitive int/float data types.  */
+      switch (type) 
+	{
+	  /* The first MAX_FPRARGS floating point arguments
+	     go in FPRs, the rest overflow to the stack.  */
+
+	  case FFI_TYPE_DOUBLE:
+	    if (n_fpr < MAX_FPRARGS)
+	      n_fpr++;
+	    else
+	      n_ov += sizeof (double) / sizeof (long);
+	    break;
+	
+	  case FFI_TYPE_FLOAT:
+	    if (n_fpr < MAX_FPRARGS)
+	      n_fpr++;
+	    else
+	      n_ov++;
+	    break;
+
+	  /* On 31-bit machines, 64-bit integers are passed in GPR pairs,
+	     if one is still available, or else on the stack.  If only one
+	     register is free, skip the register (it won't be used for any 
+	     subsequent argument either).  */
+	      
+#ifndef __s390x__
+	  case FFI_TYPE_UINT64:
+	  case FFI_TYPE_SINT64:
+	    if (n_gpr == MAX_GPRARGS-1)
+	      n_gpr = MAX_GPRARGS;
+	    if (n_gpr < MAX_GPRARGS)
+	      n_gpr += 2;
+	    else
+	      n_ov += 2;
+	    break;
+#endif
+
+	  /* Everything else is passed in GPRs (until MAX_GPRARGS
+	     have been used) or overflows to the stack.  */
+
+	  default: 
+	    if (n_gpr < MAX_GPRARGS)
+	      n_gpr++;
+	    else
+	      n_ov++;
+	    break;
+        }
+    }
+
+  /* Total stack space as required for overflow arguments
+     and temporary structure copies.  */
+
+  cif->bytes = ROUND_SIZE (n_ov * sizeof (long)) + struct_size;
+ 
+  return FFI_OK;
+}
+ 
+/*======================== End of Routine ============================*/
+ 
+/*====================================================================*/
+/*                                                                    */
+/* Name     - ffi_call.                                               */
+/*                                                                    */
+/* Function - Call the FFI routine.                                   */
+/*                                                                    */
+/*====================================================================*/
+ 
+void
+ffi_call(ffi_cif *cif,
+	 void (*fn)(void),
+	 void *rvalue,
+	 void **avalue)
+{
+  int ret_type = cif->flags;
+  extended_cif ecif;
+ 
+  ecif.cif    = cif;
+  ecif.avalue = avalue;
+  ecif.rvalue = rvalue;
+
+  /* If we don't have a return value, we need to fake one.  */
+  if (rvalue == NULL)
+    {
+      if (ret_type == FFI390_RET_STRUCT)
+	ecif.rvalue = alloca (cif->rtype->size);
+      else
+	ret_type = FFI390_RET_VOID;
+    } 
+
+  switch (cif->abi)
+    {
+      case FFI_SYSV:
+        ffi_call_SYSV (cif->bytes, &ecif, ffi_prep_args,
+		       ret_type, ecif.rvalue, fn);
+        break;
+ 
+      default:
+        FFI_ASSERT (0);
+        break;
+    }
+}
+ 
+/*======================== End of Routine ============================*/
+
+/*====================================================================*/
+/*                                                                    */
+/* Name     - ffi_closure_helper_SYSV.                                */
+/*                                                                    */
+/* Function - Call a FFI closure target function.                     */
+/*                                                                    */
+/*====================================================================*/
+ 
+void
+ffi_closure_helper_SYSV (ffi_closure *closure,
+			 unsigned long *p_gpr,
+			 unsigned long long *p_fpr,
+			 unsigned long *p_ov)
+{
+  unsigned long long ret_buffer;
+
+  void *rvalue = &ret_buffer;
+  void **avalue;
+  void **p_arg;
+
+  int n_gpr = 0;
+  int n_fpr = 0;
+  int n_ov = 0;
+
+  ffi_type **ptr;
+  int i;
+
+  /* Allocate buffer for argument list pointers.  */
+
+  p_arg = avalue = alloca (closure->cif->nargs * sizeof (void *));
+
+  /* If we returning a structure, pass the structure address 
+     directly to the target function.  Otherwise, have the target 
+     function store the return value to the GPR save area.  */
+
+  if (closure->cif->flags == FFI390_RET_STRUCT)
+    rvalue = (void *) p_gpr[n_gpr++];
+
+  /* Now for the arguments.  */
+
+  for (ptr = closure->cif->arg_types, i = closure->cif->nargs;
+       i > 0;
+       i--, p_arg++, ptr++)
+    {
+      int deref_struct_pointer = 0;
+      int type = (*ptr)->type;
+
+#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
+      /* 16-byte long double is passed like a struct.  */
+      if (type == FFI_TYPE_LONGDOUBLE)
+	type = FFI_TYPE_STRUCT;
+#endif
+
+      /* Check how a structure type is passed.  */
+      if (type == FFI_TYPE_STRUCT)
+	{
+	  type = ffi_check_struct_type (*ptr);
+
+	  /* If we pass the struct via pointer, remember to 
+	     retrieve the pointer later.  */
+	  if (type == FFI_TYPE_POINTER)
+	    deref_struct_pointer = 1;
+	}
+
+      /* Pointers are passed like UINTs of the same size.  */
+      if (type == FFI_TYPE_POINTER)
+#ifdef __s390x__
+	type = FFI_TYPE_UINT64;
+#else
+	type = FFI_TYPE_UINT32;
+#endif
+
+      /* Now handle all primitive int/float data types.  */
+      switch (type) 
+	{
+	  case FFI_TYPE_DOUBLE:
+	    if (n_fpr < MAX_FPRARGS)
+	      *p_arg = &p_fpr[n_fpr++];
+	    else
+	      *p_arg = &p_ov[n_ov], 
+	      n_ov += sizeof (double) / sizeof (long);
+	    break;
+	
+	  case FFI_TYPE_FLOAT:
+	    if (n_fpr < MAX_FPRARGS)
+	      *p_arg = &p_fpr[n_fpr++];
+	    else
+	      *p_arg = (char *)&p_ov[n_ov++] + sizeof (long) - 4;
+	    break;
+ 
+	  case FFI_TYPE_UINT64:
+	  case FFI_TYPE_SINT64:
+#ifdef __s390x__
+	    if (n_gpr < MAX_GPRARGS)
+	      *p_arg = &p_gpr[n_gpr++];
+	    else
+	      *p_arg = &p_ov[n_ov++];
+#else
+	    if (n_gpr == MAX_GPRARGS-1)
+	      n_gpr = MAX_GPRARGS;
+	    if (n_gpr < MAX_GPRARGS)
+	      *p_arg = &p_gpr[n_gpr], n_gpr += 2;
+	    else
+	      *p_arg = &p_ov[n_ov], n_ov += 2;
+#endif
+	    break;
+ 
+	  case FFI_TYPE_INT:
+	  case FFI_TYPE_UINT32:
+	  case FFI_TYPE_SINT32:
+	    if (n_gpr < MAX_GPRARGS)
+	      *p_arg = (char *)&p_gpr[n_gpr++] + sizeof (long) - 4;
+	    else
+	      *p_arg = (char *)&p_ov[n_ov++] + sizeof (long) - 4;
+	    break;
+ 
+	  case FFI_TYPE_UINT16:
+	  case FFI_TYPE_SINT16:
+	    if (n_gpr < MAX_GPRARGS)
+	      *p_arg = (char *)&p_gpr[n_gpr++] + sizeof (long) - 2;
+	    else
+	      *p_arg = (char *)&p_ov[n_ov++] + sizeof (long) - 2;
+	    break;
+
+	  case FFI_TYPE_UINT8:
+	  case FFI_TYPE_SINT8:
+	    if (n_gpr < MAX_GPRARGS)
+	      *p_arg = (char *)&p_gpr[n_gpr++] + sizeof (long) - 1;
+	    else
+	      *p_arg = (char *)&p_ov[n_ov++] + sizeof (long) - 1;
+	    break;
+ 
+	  default:
+	    FFI_ASSERT (0);
+	    break;
+        }
+
+      /* If this is a struct passed via pointer, we need to
+	 actually retrieve that pointer.  */
+      if (deref_struct_pointer)
+	*p_arg = *(void **)*p_arg;
+    }
+
+
+  /* Call the target function.  */
+  (closure->fun) (closure->cif, rvalue, avalue, closure->user_data);
+
+  /* Convert the return value.  */
+  switch (closure->cif->rtype->type)
+    {
+      /* Void is easy, and so is struct.  */
+      case FFI_TYPE_VOID:
+      case FFI_TYPE_STRUCT:
+#if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
+      case FFI_TYPE_LONGDOUBLE:
+#endif
+	break;
+
+      /* Floating point values are returned in fpr 0.  */
+      case FFI_TYPE_FLOAT:
+	p_fpr[0] = (long long) *(unsigned int *) rvalue << 32;
+	break;
+
+      case FFI_TYPE_DOUBLE:
+	p_fpr[0] = *(unsigned long long *) rvalue;
+	break;
+
+      /* Integer values are returned in gpr 2 (and gpr 3
+	 for 64-bit values on 31-bit machines).  */
+      case FFI_TYPE_UINT64:
+      case FFI_TYPE_SINT64:
+#ifdef __s390x__
+	p_gpr[0] = *(unsigned long *) rvalue;
+#else
+	p_gpr[0] = ((unsigned long *) rvalue)[0],
+	p_gpr[1] = ((unsigned long *) rvalue)[1];
+#endif
+	break;
+
+      case FFI_TYPE_POINTER:
+      case FFI_TYPE_UINT32:
+      case FFI_TYPE_UINT16:
+      case FFI_TYPE_UINT8:
+	p_gpr[0] = *(unsigned long *) rvalue;
+	break;
+
+      case FFI_TYPE_INT:
+      case FFI_TYPE_SINT32:
+      case FFI_TYPE_SINT16:
+      case FFI_TYPE_SINT8:
+	p_gpr[0] = *(signed long *) rvalue;
+	break;
+
+      default:
+        FFI_ASSERT (0);
+        break;
+    }
+}
+ 
+/*======================== End of Routine ============================*/
+
+/*====================================================================*/
+/*                                                                    */
+/* Name     - ffi_prep_closure_loc.                                   */
+/*                                                                    */
+/* Function - Prepare a FFI closure.                                  */
+/*                                                                    */
+/*====================================================================*/
+ 
+ffi_status
+ffi_prep_closure_loc (ffi_closure *closure,
+		      ffi_cif *cif,
+		      void (*fun) (ffi_cif *, void *, void **, void *),
+		      void *user_data,
+		      void *codeloc)
+{
+  FFI_ASSERT (cif->abi == FFI_SYSV);
+
+#ifndef __s390x__
+  *(short *)&closure->tramp [0] = 0x0d10;   /* basr %r1,0 */
+  *(short *)&closure->tramp [2] = 0x9801;   /* lm %r0,%r1,6(%r1) */
+  *(short *)&closure->tramp [4] = 0x1006;
+  *(short *)&closure->tramp [6] = 0x07f1;   /* br %r1 */
+  *(long  *)&closure->tramp [8] = (long)codeloc;
+  *(long  *)&closure->tramp[12] = (long)&ffi_closure_SYSV;
+#else
+  *(short *)&closure->tramp [0] = 0x0d10;   /* basr %r1,0 */
+  *(short *)&closure->tramp [2] = 0xeb01;   /* lmg %r0,%r1,14(%r1) */
+  *(short *)&closure->tramp [4] = 0x100e;
+  *(short *)&closure->tramp [6] = 0x0004;
+  *(short *)&closure->tramp [8] = 0x07f1;   /* br %r1 */
+  *(long  *)&closure->tramp[16] = (long)codeloc;
+  *(long  *)&closure->tramp[24] = (long)&ffi_closure_SYSV;
+#endif 
+ 
+  closure->cif = cif;
+  closure->user_data = user_data;
+  closure->fun = fun;
+ 
+  return FFI_OK;
+}
+
+/*======================== End of Routine ============================*/
+ 
diff --git a/src/s390/ffitarget.h b/src/s390/ffitarget.h
new file mode 100644
index 0000000..78f3c65
--- /dev/null
+++ b/src/s390/ffitarget.h
@@ -0,0 +1,60 @@
+/* -----------------------------------------------------------------*-C-*-
+   ffitarget.h - Copyright (c) 1996-2003  Red Hat, Inc.
+   Target configuration macros for S390.
+
+   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.
+
+   ----------------------------------------------------------------------- */
+
+#ifndef LIBFFI_TARGET_H
+#define LIBFFI_TARGET_H
+
+#if defined (__s390x__)
+#define S390X
+#endif
+
+/* ---- System specific configurations ----------------------------------- */
+
+#ifndef LIBFFI_ASM
+typedef unsigned long          ffi_arg;
+typedef signed long            ffi_sarg;
+
+typedef enum ffi_abi {
+  FFI_FIRST_ABI = 0,
+  FFI_SYSV,
+  FFI_DEFAULT_ABI = FFI_SYSV,
+  FFI_LAST_ABI = FFI_DEFAULT_ABI + 1
+} ffi_abi;
+#endif
+
+
+/* ---- Definitions for closures ----------------------------------------- */
+
+#define FFI_CLOSURES 1
+#ifdef S390X
+#define FFI_TRAMPOLINE_SIZE 32
+#else
+#define FFI_TRAMPOLINE_SIZE 16
+#endif
+#define FFI_NATIVE_RAW_API 0
+
+#endif
+
diff --git a/src/s390/sysv.S b/src/s390/sysv.S
new file mode 100644
index 0000000..4731a31
--- /dev/null
+++ b/src/s390/sysv.S
@@ -0,0 +1,434 @@
+/* -----------------------------------------------------------------------
+   sysv.S - Copyright (c) 2000 Software AG
+            Copyright (c) 2008 Red Hat, Inc.
+ 
+   S390 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.
+   ----------------------------------------------------------------------- */
+
+#define LIBFFI_ASM
+#include <fficonfig.h>
+#include <ffi.h>
+
+#ifndef __s390x__
+ 
+.text
+
+	# r2:	cif->bytes
+	# r3:	&ecif
+	# r4:	ffi_prep_args
+	# r5:	ret_type
+	# r6:	ecif.rvalue
+	# ov:	fn 
+ 
+	# This assumes we are using gas.
+	.globl	ffi_call_SYSV
+	.type	ffi_call_SYSV,%function
+ffi_call_SYSV:
+.LFB1:
+	stm	%r6,%r15,24(%r15)		# Save registers
+.LCFI0:
+	basr	%r13,0				# Set up base register
+.Lbase:
+	lr	%r11,%r15			# Set up frame pointer
+.LCFI1:
+	sr	%r15,%r2
+	ahi	%r15,-96-48			# Allocate stack
+	lr	%r8,%r6				# Save ecif.rvalue
+	sr	%r9,%r9
+	ic	%r9,.Ltable-.Lbase(%r13,%r5)	# Load epilog address
+	l	%r7,96(%r11)			# Load function address
+	st	%r11,0(%r15)			# Set up back chain
+	ahi	%r11,-48			# Register save area
+.LCFI2:
+
+	la	%r2,96(%r15)			# Save area
+						# r3 already holds &ecif
+	basr	%r14,%r4			# Call ffi_prep_args
+
+	lm	%r2,%r6,0(%r11)			# Load arguments
+	ld	%f0,32(%r11)
+	ld	%f2,40(%r11)
+	la	%r14,0(%r13,%r9)		# Set return address
+	br	%r7				# ... and call function
+
+.LretNone:					# Return void
+	l	%r4,48+56(%r11)
+	lm	%r6,%r15,48+24(%r11)
+	br	%r4
+
+.LretFloat:
+	l	%r4,48+56(%r11)
+	ste	%f0,0(%r8)			# Return float
+	lm	%r6,%r15,48+24(%r11)
+	br	%r4
+ 
+.LretDouble:
+	l	%r4,48+56(%r11)
+	std	%f0,0(%r8)			# Return double
+	lm	%r6,%r15,48+24(%r11)
+	br	%r4
+
+.LretInt32:
+	l	%r4,48+56(%r11)
+	st	%r2,0(%r8)			# Return int
+	lm	%r6,%r15,48+24(%r11)
+	br	%r4
+ 
+.LretInt64:
+	l	%r4,48+56(%r11)
+	stm	%r2,%r3,0(%r8)			# Return long long
+	lm	%r6,%r15,48+24(%r11)
+	br	%r4
+ 
+.Ltable:
+	.byte	.LretNone-.Lbase		# FFI390_RET_VOID
+	.byte	.LretNone-.Lbase		# FFI390_RET_STRUCT
+	.byte	.LretFloat-.Lbase		# FFI390_RET_FLOAT
+	.byte	.LretDouble-.Lbase		# FFI390_RET_DOUBLE
+	.byte	.LretInt32-.Lbase		# FFI390_RET_INT32
+	.byte	.LretInt64-.Lbase		# FFI390_RET_INT64
+
+.LFE1: 
+.ffi_call_SYSV_end:
+	.size	 ffi_call_SYSV,.ffi_call_SYSV_end-ffi_call_SYSV
+
+
+	.globl	ffi_closure_SYSV
+	.type	ffi_closure_SYSV,%function
+ffi_closure_SYSV:
+.LFB2:
+	stm	%r12,%r15,48(%r15)		# Save registers
+.LCFI10:
+	basr	%r13,0				# Set up base register
+.Lcbase:
+	stm	%r2,%r6,8(%r15)			# Save arguments
+	std	%f0,64(%r15)
+	std	%f2,72(%r15)
+	lr	%r1,%r15			# Set up stack frame
+	ahi	%r15,-96
+.LCFI11:
+	l	%r12,.Lchelper-.Lcbase(%r13)	# Get helper function
+	lr	%r2,%r0				# Closure
+	la	%r3,8(%r1)			# GPRs
+	la	%r4,64(%r1)			# FPRs
+	la	%r5,96(%r1)			# Overflow
+	st	%r1,0(%r15)			# Set up back chain
+
+	bas	%r14,0(%r12,%r13)		# Call helper
+
+	l	%r4,96+56(%r15)
+	ld	%f0,96+64(%r15)			# Load return registers
+	lm	%r2,%r3,96+8(%r15)
+	lm	%r12,%r15,96+48(%r15)
+	br	%r4
+
+	.align 4
+.Lchelper:
+	.long	ffi_closure_helper_SYSV-.Lcbase
+
+.LFE2: 
+
+.ffi_closure_SYSV_end:
+	.size	 ffi_closure_SYSV,.ffi_closure_SYSV_end-ffi_closure_SYSV
+
+
+	.section	.eh_frame,EH_FRAME_FLAGS,@progbits
+.Lframe1:
+	.4byte	.LECIE1-.LSCIE1	# Length of Common Information Entry
+.LSCIE1:
+	.4byte	0x0	# CIE Identifier Tag
+	.byte	0x1	# CIE Version
+	.ascii "zR\0"	# CIE Augmentation
+	.uleb128 0x1	# CIE Code Alignment Factor
+	.sleb128 -4	# CIE Data Alignment Factor
+	.byte	0xe	# CIE RA Column
+	.uleb128 0x1	# Augmentation size
+	.byte	0x1b	# FDE Encoding (pcrel sdata4)
+	.byte	0xc	# DW_CFA_def_cfa
+	.uleb128 0xf
+	.uleb128 0x60
+	.align	4
+.LECIE1:
+.LSFDE1:
+	.4byte	.LEFDE1-.LASFDE1	# FDE Length
+.LASFDE1:
+	.4byte	.LASFDE1-.Lframe1	# FDE CIE offset
+	.4byte	.LFB1-.	# FDE initial location
+	.4byte	.LFE1-.LFB1	# FDE address range
+	.uleb128 0x0	# Augmentation size
+	.byte	0x4	# DW_CFA_advance_loc4
+	.4byte	.LCFI0-.LFB1
+	.byte	0x8f	# DW_CFA_offset, column 0xf
+	.uleb128 0x9
+	.byte	0x8e	# DW_CFA_offset, column 0xe
+	.uleb128 0xa
+	.byte	0x8d	# DW_CFA_offset, column 0xd
+	.uleb128 0xb
+	.byte	0x8c	# DW_CFA_offset, column 0xc
+	.uleb128 0xc
+	.byte	0x8b	# DW_CFA_offset, column 0xb
+	.uleb128 0xd
+	.byte	0x8a	# DW_CFA_offset, column 0xa
+	.uleb128 0xe
+	.byte	0x89	# DW_CFA_offset, column 0x9
+	.uleb128 0xf
+	.byte	0x88	# DW_CFA_offset, column 0x8
+	.uleb128 0x10
+	.byte	0x87	# DW_CFA_offset, column 0x7
+	.uleb128 0x11
+	.byte	0x86	# DW_CFA_offset, column 0x6
+	.uleb128 0x12
+	.byte	0x4	# DW_CFA_advance_loc4
+	.4byte	.LCFI1-.LCFI0
+	.byte	0xd	# DW_CFA_def_cfa_register
+	.uleb128 0xb
+	.byte	0x4	# DW_CFA_advance_loc4
+	.4byte	.LCFI2-.LCFI1
+	.byte	0xe	# DW_CFA_def_cfa_offset
+	.uleb128 0x90
+	.align	4
+.LEFDE1:
+.LSFDE2:
+	.4byte	.LEFDE2-.LASFDE2	# FDE Length
+.LASFDE2:
+	.4byte	.LASFDE2-.Lframe1	# FDE CIE offset
+	.4byte	.LFB2-.	# FDE initial location
+	.4byte	.LFE2-.LFB2	# FDE address range
+	.uleb128 0x0	# Augmentation size
+	.byte	0x4	# DW_CFA_advance_loc4
+	.4byte	.LCFI10-.LFB2
+	.byte	0x8f	# DW_CFA_offset, column 0xf
+	.uleb128 0x9
+	.byte	0x8e	# DW_CFA_offset, column 0xe
+	.uleb128 0xa
+	.byte	0x8d	# DW_CFA_offset, column 0xd
+	.uleb128 0xb
+	.byte	0x8c	# DW_CFA_offset, column 0xc
+	.uleb128 0xc
+	.byte	0x4	# DW_CFA_advance_loc4
+	.4byte	.LCFI11-.LCFI10
+	.byte	0xe	# DW_CFA_def_cfa_offset
+	.uleb128 0xc0
+	.align	4
+.LEFDE2:
+
+#else
+ 
+.text
+ 
+	# r2:	cif->bytes
+	# r3:	&ecif
+	# r4:	ffi_prep_args
+	# r5:	ret_type
+	# r6:	ecif.rvalue
+	# ov:	fn 
+ 
+	# This assumes we are using gas.
+	.globl	ffi_call_SYSV
+	.type	ffi_call_SYSV,%function
+ffi_call_SYSV:
+.LFB1:
+	stmg	%r6,%r15,48(%r15)		# Save registers
+.LCFI0:
+	larl	%r13,.Lbase			# Set up base register
+	lgr	%r11,%r15			# Set up frame pointer
+.LCFI1:
+	sgr	%r15,%r2
+	aghi	%r15,-160-80			# Allocate stack
+	lgr	%r8,%r6				# Save ecif.rvalue
+	llgc	%r9,.Ltable-.Lbase(%r13,%r5)	# Load epilog address
+	lg	%r7,160(%r11)			# Load function address
+	stg	%r11,0(%r15)			# Set up back chain
+	aghi	%r11,-80			# Register save area
+.LCFI2:
+
+	la	%r2,160(%r15)			# Save area
+						# r3 already holds &ecif
+	basr	%r14,%r4			# Call ffi_prep_args
+
+	lmg	%r2,%r6,0(%r11)			# Load arguments
+	ld	%f0,48(%r11)
+	ld	%f2,56(%r11)
+	ld	%f4,64(%r11)
+	ld	%f6,72(%r11)
+	la	%r14,0(%r13,%r9)		# Set return address
+	br	%r7				# ... and call function
+
+.Lbase:
+.LretNone:					# Return void
+	lg	%r4,80+112(%r11)
+	lmg	%r6,%r15,80+48(%r11)
+	br	%r4
+
+.LretFloat:
+	lg	%r4,80+112(%r11)
+	ste	%f0,0(%r8)			# Return float
+	lmg	%r6,%r15,80+48(%r11)
+	br	%r4
+ 
+.LretDouble:
+	lg	%r4,80+112(%r11)
+	std	%f0,0(%r8)			# Return double
+	lmg	%r6,%r15,80+48(%r11)
+	br	%r4
+
+.LretInt32:
+	lg	%r4,80+112(%r11)
+	st	%r2,0(%r8)			# Return int
+	lmg	%r6,%r15,80+48(%r11)
+	br	%r4
+ 
+.LretInt64:
+	lg	%r4,80+112(%r11)
+	stg	%r2,0(%r8)			# Return long
+	lmg	%r6,%r15,80+48(%r11)
+	br	%r4
+ 
+.Ltable:
+	.byte	.LretNone-.Lbase		# FFI390_RET_VOID
+	.byte	.LretNone-.Lbase		# FFI390_RET_STRUCT
+	.byte	.LretFloat-.Lbase		# FFI390_RET_FLOAT
+	.byte	.LretDouble-.Lbase		# FFI390_RET_DOUBLE
+	.byte	.LretInt32-.Lbase		# FFI390_RET_INT32
+	.byte	.LretInt64-.Lbase		# FFI390_RET_INT64
+
+.LFE1: 
+.ffi_call_SYSV_end:
+	.size	 ffi_call_SYSV,.ffi_call_SYSV_end-ffi_call_SYSV
+
+
+	.globl	ffi_closure_SYSV
+	.type	ffi_closure_SYSV,%function
+ffi_closure_SYSV:
+.LFB2:
+	stmg	%r14,%r15,112(%r15)		# Save registers
+.LCFI10:
+	stmg	%r2,%r6,16(%r15)		# Save arguments
+	std	%f0,128(%r15)
+	std	%f2,136(%r15)
+	std	%f4,144(%r15)
+	std	%f6,152(%r15)
+	lgr	%r1,%r15			# Set up stack frame
+	aghi	%r15,-160
+.LCFI11:
+	lgr	%r2,%r0				# Closure
+	la	%r3,16(%r1)			# GPRs
+	la	%r4,128(%r1)			# FPRs
+	la	%r5,160(%r1)			# Overflow
+	stg	%r1,0(%r15)			# Set up back chain
+
+	brasl	%r14,ffi_closure_helper_SYSV	# Call helper
+
+	lg	%r14,160+112(%r15)
+	ld	%f0,160+128(%r15)		# Load return registers
+	lg	%r2,160+16(%r15)
+	la	%r15,160(%r15)
+	br	%r14
+.LFE2: 
+
+.ffi_closure_SYSV_end:
+	.size	 ffi_closure_SYSV,.ffi_closure_SYSV_end-ffi_closure_SYSV
+
+
+
+	.section	.eh_frame,EH_FRAME_FLAGS,@progbits
+.Lframe1:
+	.4byte	.LECIE1-.LSCIE1	# Length of Common Information Entry
+.LSCIE1:
+	.4byte	0x0	# CIE Identifier Tag
+	.byte	0x1	# CIE Version
+	.ascii "zR\0"	# CIE Augmentation
+	.uleb128 0x1	# CIE Code Alignment Factor
+	.sleb128 -8	# CIE Data Alignment Factor
+	.byte	0xe	# CIE RA Column
+	.uleb128 0x1	# Augmentation size
+	.byte	0x1b	# FDE Encoding (pcrel sdata4)
+	.byte	0xc	# DW_CFA_def_cfa
+	.uleb128 0xf
+	.uleb128 0xa0
+	.align	8
+.LECIE1:
+.LSFDE1:
+	.4byte	.LEFDE1-.LASFDE1	# FDE Length
+.LASFDE1:
+	.4byte	.LASFDE1-.Lframe1	# FDE CIE offset
+	.4byte	.LFB1-.	# FDE initial location
+	.4byte	.LFE1-.LFB1	# FDE address range
+	.uleb128 0x0	# Augmentation size
+	.byte	0x4	# DW_CFA_advance_loc4
+	.4byte	.LCFI0-.LFB1
+	.byte	0x8f	# DW_CFA_offset, column 0xf
+	.uleb128 0x5
+	.byte	0x8e	# DW_CFA_offset, column 0xe
+	.uleb128 0x6
+	.byte	0x8d	# DW_CFA_offset, column 0xd
+	.uleb128 0x7
+	.byte	0x8c	# DW_CFA_offset, column 0xc
+	.uleb128 0x8
+	.byte	0x8b	# DW_CFA_offset, column 0xb
+	.uleb128 0x9
+	.byte	0x8a	# DW_CFA_offset, column 0xa
+	.uleb128 0xa
+	.byte	0x89	# DW_CFA_offset, column 0x9
+	.uleb128 0xb
+	.byte	0x88	# DW_CFA_offset, column 0x8
+	.uleb128 0xc
+	.byte	0x87	# DW_CFA_offset, column 0x7
+	.uleb128 0xd
+	.byte	0x86	# DW_CFA_offset, column 0x6
+	.uleb128 0xe
+	.byte	0x4	# DW_CFA_advance_loc4
+	.4byte	.LCFI1-.LCFI0
+	.byte	0xd	# DW_CFA_def_cfa_register
+	.uleb128 0xb
+	.byte	0x4	# DW_CFA_advance_loc4
+	.4byte	.LCFI2-.LCFI1
+	.byte	0xe	# DW_CFA_def_cfa_offset
+	.uleb128 0xf0
+	.align	8
+.LEFDE1:
+.LSFDE2:
+	.4byte	.LEFDE2-.LASFDE2	# FDE Length
+.LASFDE2:
+	.4byte	.LASFDE2-.Lframe1	# FDE CIE offset
+	.4byte	.LFB2-.	# FDE initial location
+	.4byte	.LFE2-.LFB2	# FDE address range
+	.uleb128 0x0	# Augmentation size
+	.byte	0x4	# DW_CFA_advance_loc4
+	.4byte	.LCFI10-.LFB2
+	.byte	0x8f	# DW_CFA_offset, column 0xf
+	.uleb128 0x5
+	.byte	0x8e	# DW_CFA_offset, column 0xe
+	.uleb128 0x6
+	.byte	0x4	# DW_CFA_advance_loc4
+	.4byte	.LCFI11-.LCFI10
+	.byte	0xe	# DW_CFA_def_cfa_offset
+	.uleb128 0x140
+	.align	8
+.LEFDE2:
+
+#endif
+
+#if defined __ELF__ && defined __linux__
+	.section	.note.GNU-stack,"",@progbits
+#endif