obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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1 files changed, 504 insertions, 0 deletions

diff --git a/libffi/src/arm/ffi.c b/libffi/src/arm/ffi.c
new file mode 100644
index 000000000..4e72c3bcd
--- /dev/null
+++ b/libffi/src/arm/ffi.c
@@ -0,0 +1,504 @@
+/* -----------------------------------------------------------------------
+   ffi.c - Copyright (c) 1998, 2008  Red Hat, Inc.
+   
+   ARM 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>
+
+/* Forward declares. */
+static int vfp_type_p (ffi_type *);
+static void layout_vfp_args (ffi_cif *);
+
+/* ffi_prep_args is called by the assembly routine once stack space
+   has been allocated for the function's arguments
+   
+   The vfp_space parameter is the load area for VFP regs, the return
+   value is cif->vfp_used (word bitset of VFP regs used for passing
+   arguments). These are only used for the VFP hard-float ABI.
+*/
+int ffi_prep_args(char *stack, extended_cif *ecif, float *vfp_space)
+{
+  register unsigned int i, vi = 0;
+  register void **p_argv;
+  register char *argp;
+  register ffi_type **p_arg;
+
+  argp = stack;
+
+  if ( ecif->cif->flags == 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;
+
+      /* Allocated in VFP registers. */
+      if (ecif->cif->abi == FFI_VFP
+	  && vi < ecif->cif->vfp_nargs && vfp_type_p (*p_arg))
+	{
+	  float* vfp_slot = vfp_space + ecif->cif->vfp_args[vi++];
+	  if ((*p_arg)->type == FFI_TYPE_FLOAT)
+	    *((float*)vfp_slot) = *((float*)*p_argv);
+	  else if ((*p_arg)->type == FFI_TYPE_DOUBLE)
+	    *((double*)vfp_slot) = *((double*)*p_argv);
+	  else
+	    memcpy(vfp_slot, *p_argv, (*p_arg)->size);
+	  p_argv++;
+	  continue;
+	}
+
+      /* Align if necessary */
+      if (((*p_arg)->alignment - 1) & (unsigned) argp) {
+	argp = (char *) ALIGN(argp, (*p_arg)->alignment);
+      }
+
+      if ((*p_arg)->type == FFI_TYPE_STRUCT)
+	argp = (char *) ALIGN(argp, 4);
+
+	  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
+	    {
+	      memcpy(argp, *p_argv, z);
+	    }
+	  p_argv++;
+	  argp += z;
+    }
+
+  /* Indicate the VFP registers used. */
+  return ecif->cif->vfp_used;
+}
+
+/* Perform machine dependent cif processing */
+ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
+{
+  int type_code;
+  /* Round the stack up to a multiple of 8 bytes.  This isn't needed 
+     everywhere, but it is on some platforms, and it doesn't harm anything
+     when it isn't needed.  */
+  cif->bytes = (cif->bytes + 7) & ~7;
+
+  /* Set the return type flag */
+  switch (cif->rtype->type)
+    {
+    case FFI_TYPE_VOID:
+    case FFI_TYPE_FLOAT:
+    case FFI_TYPE_DOUBLE:
+      cif->flags = (unsigned) cif->rtype->type;
+      break;
+
+    case FFI_TYPE_SINT64:
+    case FFI_TYPE_UINT64:
+      cif->flags = (unsigned) FFI_TYPE_SINT64;
+      break;
+
+    case FFI_TYPE_STRUCT:
+      if (cif->abi == FFI_VFP
+	  && (type_code = vfp_type_p (cif->rtype)) != 0)
+	{
+	  /* A Composite Type passed in VFP registers, either
+	     FFI_TYPE_STRUCT_VFP_FLOAT or FFI_TYPE_STRUCT_VFP_DOUBLE. */
+	  cif->flags = (unsigned) type_code;
+	}
+      else if (cif->rtype->size <= 4)
+	/* A Composite Type not larger than 4 bytes is returned in r0.  */
+	cif->flags = (unsigned)FFI_TYPE_INT;
+      else
+	/* A Composite Type larger than 4 bytes, or whose size cannot
+	   be determined statically ... is stored in memory at an
+	   address passed [in r0].  */
+	cif->flags = (unsigned)FFI_TYPE_STRUCT;
+      break;
+
+    default:
+      cif->flags = FFI_TYPE_INT;
+      break;
+    }
+
+  /* Map out the register placements of VFP register args.
+     The VFP hard-float calling conventions are slightly more sophisticated than
+     the base calling conventions, so we do it here instead of in ffi_prep_args(). */
+  if (cif->abi == FFI_VFP)
+    layout_vfp_args (cif);
+
+  return FFI_OK;
+}
+
+/* Prototypes for assembly functions, in sysv.S */
+extern void ffi_call_SYSV (void (*fn)(void), extended_cif *, unsigned, unsigned, unsigned *);
+extern void ffi_call_VFP (void (*fn)(void), extended_cif *, unsigned, unsigned, unsigned *);
+
+void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
+{
+  extended_cif ecif;
+
+  int small_struct = (cif->flags == FFI_TYPE_INT 
+		      && cif->rtype->type == FFI_TYPE_STRUCT);
+  int vfp_struct = (cif->flags == FFI_TYPE_STRUCT_VFP_FLOAT
+		    || cif->flags == FFI_TYPE_STRUCT_VFP_DOUBLE);
+
+  ecif.cif = cif;
+  ecif.avalue = avalue;
+
+  unsigned int temp;
+  
+  /* 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->flags == FFI_TYPE_STRUCT))
+    {
+      ecif.rvalue = alloca(cif->rtype->size);
+    }
+  else if (small_struct)
+    ecif.rvalue = &temp;
+  else if (vfp_struct)
+    {
+      /* Largest case is double x 4. */
+      ecif.rvalue = alloca(32);
+    }
+  else
+    ecif.rvalue = rvalue;
+
+  switch (cif->abi) 
+    {
+    case FFI_SYSV:
+      ffi_call_SYSV (fn, &ecif, cif->bytes, cif->flags, ecif.rvalue);
+      break;
+
+    case FFI_VFP:
+      ffi_call_VFP (fn, &ecif, cif->bytes, cif->flags, ecif.rvalue);
+      break;
+
+    default:
+      FFI_ASSERT(0);
+      break;
+    }
+  if (small_struct)
+    memcpy (rvalue, &temp, cif->rtype->size);
+  else if (vfp_struct)
+    memcpy (rvalue, ecif.rvalue, cif->rtype->size);
+}
+
+/** private members **/
+
+static void ffi_prep_incoming_args_SYSV (char *stack, void **ret,
+					 void** args, ffi_cif* cif, float *vfp_stack);
+
+void ffi_closure_SYSV (ffi_closure *);
+
+void ffi_closure_VFP (ffi_closure *);
+
+/* This function is jumped to by the trampoline */
+
+unsigned int
+ffi_closure_SYSV_inner (closure, respp, args, vfp_args)
+     ffi_closure *closure;
+     void **respp;
+     void *args;
+     void *vfp_args;
+{
+  // our various things...
+  ffi_cif       *cif;
+  void         **arg_area;
+
+  cif         = closure->cif;
+  arg_area    = (void**) alloca (cif->nargs * sizeof (void*));  
+
+  /* this call will initialize ARG_AREA, such that each
+   * element in that array points to the corresponding 
+   * value on the stack; and if the function returns
+   * a structure, it will re-set RESP to point to the
+   * structure return address.  */
+
+  ffi_prep_incoming_args_SYSV(args, respp, arg_area, cif, vfp_args);
+
+  (closure->fun) (cif, *respp, arg_area, closure->user_data);
+
+  return cif->flags;
+}
+
+/*@-exportheader@*/
+static void 
+ffi_prep_incoming_args_SYSV(char *stack, void **rvalue,
+			    void **avalue, ffi_cif *cif,
+			    /* Used only under VFP hard-float ABI. */
+			    float *vfp_stack)
+/*@=exportheader@*/
+{
+  register unsigned int i, vi = 0;
+  register void **p_argv;
+  register char *argp;
+  register ffi_type **p_arg;
+
+  argp = stack;
+
+  if ( cif->flags == FFI_TYPE_STRUCT ) {
+    *rvalue = *(void **) argp;
+    argp += 4;
+  }
+
+  p_argv = avalue;
+
+  for (i = cif->nargs, p_arg = cif->arg_types; (i != 0); i--, p_arg++)
+    {
+      size_t z;
+      size_t alignment;
+  
+      if (cif->abi == FFI_VFP
+	  && vi < cif->vfp_nargs && vfp_type_p (*p_arg))
+	{
+	  *p_argv++ = (void*)(vfp_stack + cif->vfp_args[vi++]);
+	  continue;
+	}
+
+      alignment = (*p_arg)->alignment;
+      if (alignment < 4)
+	alignment = 4;
+      /* Align if necessary */
+      if ((alignment - 1) & (unsigned) argp) {
+	argp = (char *) ALIGN(argp, alignment);
+      }
+
+      z = (*p_arg)->size;
+
+      /* because we're little endian, this is what it turns into.   */
+
+      *p_argv = (void*) argp;
+
+      p_argv++;
+      argp += z;
+    }
+  
+  return;
+}
+
+/* How to make a trampoline.  */
+
+#define FFI_INIT_TRAMPOLINE(TRAMP,FUN,CTX)				\
+({ unsigned char *__tramp = (unsigned char*)(TRAMP);			\
+   unsigned int  __fun = (unsigned int)(FUN);				\
+   unsigned int  __ctx = (unsigned int)(CTX);				\
+   unsigned char *insns = (unsigned char *)(CTX);                       \
+   *(unsigned int*) &__tramp[0] = 0xe92d000f; /* stmfd sp!, {r0-r3} */	\
+   *(unsigned int*) &__tramp[4] = 0xe59f0000; /* ldr r0, [pc] */	\
+   *(unsigned int*) &__tramp[8] = 0xe59ff000; /* ldr pc, [pc] */	\
+   *(unsigned int*) &__tramp[12] = __ctx;				\
+   *(unsigned int*) &__tramp[16] = __fun;				\
+   __clear_cache((&__tramp[0]), (&__tramp[19])); /* Clear data mapping.  */ \
+   __clear_cache(insns, insns + 3 * sizeof (unsigned int));             \
+                                                 /* Clear instruction   \
+                                                    mapping.  */        \
+ })
+
+
+/* the cif must already be prep'ed */
+
+ffi_status
+ffi_prep_closure_loc (ffi_closure* closure,
+		      ffi_cif* cif,
+		      void (*fun)(ffi_cif*,void*,void**,void*),
+		      void *user_data,
+		      void *codeloc)
+{
+  void (*closure_func)(ffi_closure*) = NULL;
+
+  if (cif->abi == FFI_SYSV)
+    closure_func = &ffi_closure_SYSV;
+  else if (cif->abi == FFI_VFP)
+    closure_func = &ffi_closure_VFP;
+  else
+    FFI_ASSERT (0);
+    
+  FFI_INIT_TRAMPOLINE (&closure->tramp[0], \
+		       closure_func,  \
+		       codeloc);
+    
+  closure->cif  = cif;
+  closure->user_data = user_data;
+  closure->fun  = fun;
+
+  return FFI_OK;
+}
+
+/* Below are routines for VFP hard-float support. */
+
+static int rec_vfp_type_p (ffi_type *t, int *elt, int *elnum)
+{
+  switch (t->type)
+    {
+    case FFI_TYPE_FLOAT:
+    case FFI_TYPE_DOUBLE:
+      *elt = (int) t->type;
+      *elnum = 1;
+      return 1;
+
+    case FFI_TYPE_STRUCT_VFP_FLOAT:
+      *elt = FFI_TYPE_FLOAT;
+      *elnum = t->size / sizeof (float);
+      return 1;
+
+    case FFI_TYPE_STRUCT_VFP_DOUBLE:
+      *elt = FFI_TYPE_DOUBLE;
+      *elnum = t->size / sizeof (double);
+      return 1;
+
+    case FFI_TYPE_STRUCT:;
+      {
+	int base_elt = 0, total_elnum = 0;
+	ffi_type **el = t->elements;
+	while (*el)
+	  {
+	    int el_elt = 0, el_elnum = 0;
+	    if (! rec_vfp_type_p (*el, &el_elt, &el_elnum)
+		|| (base_elt && base_elt != el_elt)
+		|| total_elnum + el_elnum > 4)
+	      return 0;
+	    base_elt = el_elt;
+	    total_elnum += el_elnum;
+	    el++;
+	  }
+	*elnum = total_elnum;
+	*elt = base_elt;
+	return 1;
+      }
+    default: ;
+    }
+  return 0;
+}
+
+static int vfp_type_p (ffi_type *t)
+{
+  int elt, elnum;
+  if (rec_vfp_type_p (t, &elt, &elnum))
+    {
+      if (t->type == FFI_TYPE_STRUCT)
+	{
+	  if (elnum == 1)
+	    t->type = elt;
+	  else
+	    t->type = (elt == FFI_TYPE_FLOAT
+		       ? FFI_TYPE_STRUCT_VFP_FLOAT
+		       : FFI_TYPE_STRUCT_VFP_DOUBLE);
+	}
+      return (int) t->type;
+    }
+  return 0;
+}
+
+static void place_vfp_arg (ffi_cif *cif, ffi_type *t)
+{
+  int reg = cif->vfp_reg_free;
+  int nregs = t->size / sizeof (float);
+  int align = ((t->type == FFI_TYPE_STRUCT_VFP_FLOAT
+		|| t->type == FFI_TYPE_FLOAT) ? 1 : 2);
+  /* Align register number. */
+  if ((reg & 1) && align == 2)
+    reg++;
+  while (reg + nregs <= 16)
+    {
+      int s, new_used = 0;
+      for (s = reg; s < reg + nregs; s++)
+	{
+	  new_used |= (1 << s);
+	  if (cif->vfp_used & (1 << s))
+	    {
+	      reg += align;
+	      goto next_reg;
+	    }
+	}
+      /* Found regs to allocate. */
+      cif->vfp_used |= new_used;
+      cif->vfp_args[cif->vfp_nargs++] = reg;
+
+      /* Update vfp_reg_free. */
+      if (cif->vfp_used & (1 << cif->vfp_reg_free))
+	{
+	  reg += nregs;
+	  while (cif->vfp_used & (1 << reg))
+	    reg += 1;
+	  cif->vfp_reg_free = reg;
+	}
+      return;
+    next_reg: ;
+    }
+}
+
+static void layout_vfp_args (ffi_cif *cif)
+{
+  int i;
+  /* Init VFP fields */
+  cif->vfp_used = 0;
+  cif->vfp_nargs = 0;
+  cif->vfp_reg_free = 0;
+  memset (cif->vfp_args, -1, 16); /* Init to -1. */
+
+  for (i = 0; i < cif->nargs; i++)
+    {
+      ffi_type *t = cif->arg_types[i];
+      if (vfp_type_p (t))
+	place_vfp_arg (cif, t);
+    }
+}