Update from recent gcc version.

4 files changed, 441 insertions, 350 deletions

diff --git a/sysdeps/generic/unwind-dw2-fde.c b/sysdeps/generic/unwind-dw2-fde.c
index 6c51c6f730..64c0846ccb 100644
--- a/sysdeps/generic/unwind-dw2-fde.c
+++ b/sysdeps/generic/unwind-dw2-fde.c
@@ -1,13 +1,13 @@
 /* Subroutines needed for unwinding stack frames for exception handling.  */
-/* Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
    Contributed by Jason Merrill <jason@cygnus.com>.
 
-This file is part of GNU CC.
+This file is part of GCC.
 
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
 
 In addition to the permissions in the GNU General Public License, the
 Free Software Foundation gives you unlimited permission to link the
@@ -18,15 +18,15 @@ do apply in other respects; for example, they cover modification of
 the file, and distribution when not linked into a combine
 executable.)
 
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
 
 You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING.  If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA.  */
+along with GCC; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.  */
 
 #ifdef _LIBC
 # include <shlib-compat.h>
@@ -44,6 +44,7 @@ Boston, MA 02111-1307, USA.  */
 #include <unwind-pe.h>
 #include <unwind-dw2-fde.h>
 #else
+#ifndef _Unwind_Find_FDE
 #include "tconfig.h"
 #include "tsystem.h"
 #include "dwarf2.h"
@@ -53,6 +54,7 @@ Boston, MA 02111-1307, USA.  */
 #include "unwind-dw2-fde.h"
 #include "gthr.h"
 #endif
+#endif
 
 /* The unseen_objects list contains objects that have been registered
    but not yet categorized in any way.  The seen_objects list has had
@@ -109,7 +111,7 @@ __register_frame_info_bases (void *begin, struct object *ob,
 			     void *tbase, void *dbase)
 {
   /* If .eh_frame is empty, don't register at all.  */
-  if (*(uword *)begin == 0)
+  if (*(uword *) begin == 0)
     return;
 
   ob->pc_begin = (void *)-1;
@@ -118,6 +120,9 @@ __register_frame_info_bases (void *begin, struct object *ob,
   ob->u.single = begin;
   ob->s.i = 0;
   ob->s.b.encoding = DW_EH_PE_omit;
+#ifdef DWARF2_OBJECT_END_PTR_EXTENSION
+  ob->fde_end = NULL;
+#endif
 
   init_object_mutex_once ();
   __gthread_mutex_lock (&object_mutex);
@@ -141,7 +146,7 @@ __register_frame (void *begin)
   struct object *ob;
 
   /* If .eh_frame is empty, don't register at all.  */
-  if (*(uword *)begin == 0)
+  if (*(uword *) begin == 0)
     return;
 
   ob = (struct object *) malloc (sizeof (struct object));
@@ -206,7 +211,7 @@ __deregister_frame_info_bases (void *begin)
   struct object *ob = 0;
 
   /* If .eh_frame is empty, we haven't registered.  */
-  if (*(uword *)begin == 0)
+  if (*(uword *) begin == 0)
     return ob;
 
   init_object_mutex_once ();
@@ -260,7 +265,7 @@ void
 __deregister_frame (void *begin)
 {
   /* If .eh_frame is empty, we haven't registered.  */
-  if (*(uword *)begin != 0)
+  if (*(uword *) begin != 0)
     free (INTUSE(__deregister_frame_info_bases) (begin));
 }
 
@@ -297,18 +302,20 @@ get_cie_encoding (struct dwarf_cie *cie)
 {
   const unsigned char *aug, *p;
   _Unwind_Ptr dummy;
+  _Unwind_Word utmp;
+  _Unwind_Sword stmp;
 
   aug = cie->augmentation;
   if (aug[0] != 'z')
     return DW_EH_PE_absptr;
 
   p = aug + strlen (aug) + 1;		/* Skip the augmentation string.  */
-  p = read_uleb128 (p, &dummy);		/* Skip code alignment.  */
-  p = read_sleb128 (p, &dummy);		/* Skip data alignment.  */
+  p = read_uleb128 (p, &utmp);		/* Skip code alignment.  */
+  p = read_sleb128 (p, &stmp);		/* Skip data alignment.  */
   p++;					/* Skip return address column.  */
 
   aug++;				/* Skip 'z' */
-  p = read_uleb128 (p, &dummy);		/* Skip augmentation length.  */
+  p = read_uleb128 (p, &utmp);		/* Skip augmentation length.  */
   while (1)
     {
       /* This is what we're looking for.  */
@@ -345,14 +352,21 @@ get_fde_encoding (struct dwarf_fde *f)
 
 /* Comparison routines.  Three variants of increasing complexity.  */
 
-static saddr
+static int
 fde_unencoded_compare (struct object *ob __attribute__((unused)),
 		       fde *x, fde *y)
 {
-  return *(saddr *)x->pc_begin - *(saddr *)y->pc_begin;
+  _Unwind_Ptr x_ptr = *(_Unwind_Ptr *) x->pc_begin;
+  _Unwind_Ptr y_ptr = *(_Unwind_Ptr *) y->pc_begin;
+
+  if (x_ptr > y_ptr)
+    return 1;
+  if (x_ptr < y_ptr)
+    return -1;
+  return 0;
 }
 
-static saddr
+static int
 fde_single_encoding_compare (struct object *ob, fde *x, fde *y)
 {
   _Unwind_Ptr base, x_ptr, y_ptr;
@@ -361,10 +375,14 @@ fde_single_encoding_compare (struct object *ob, fde *x, fde *y)
   read_encoded_value_with_base (ob->s.b.encoding, base, x->pc_begin, &x_ptr);
   read_encoded_value_with_base (ob->s.b.encoding, base, y->pc_begin, &y_ptr);
 
-  return x_ptr - y_ptr;
+  if (x_ptr > y_ptr)
+    return 1;
+  if (x_ptr < y_ptr)
+    return -1;
+  return 0;
 }
 
-static saddr
+static int
 fde_mixed_encoding_compare (struct object *ob, fde *x, fde *y)
 {
   int x_encoding, y_encoding;
@@ -378,10 +396,14 @@ fde_mixed_encoding_compare (struct object *ob, fde *x, fde *y)
   read_encoded_value_with_base (y_encoding, base_from_object (y_encoding, ob),
 				y->pc_begin, &y_ptr);
 
-  return x_ptr - y_ptr;
+  if (x_ptr > y_ptr)
+    return 1;
+  if (x_ptr < y_ptr)
+    return -1;
+  return 0;
 }
 
-typedef saddr (*fde_compare_t) (struct object *, fde *, fde *);
+typedef int (*fde_compare_t) (struct object *, fde *, fde *);
 
 
 /* This is a special mix of insertion sort and heap sort, optimized for
@@ -459,13 +481,13 @@ fde_split (struct object *ob, fde_compare_t fde_compare,
       fde **probe;
 
       for (probe = chain_end;
-           probe != &marker && fde_compare (ob, linear->array[i], *probe) < 0;
-           probe = chain_end)
-        {
-          chain_end = (fde **)erratic->array[probe - linear->array];
-          erratic->array[probe - linear->array] = NULL;
-        }
-      erratic->array[i] = (fde *)chain_end;
+	   probe != &marker && fde_compare (ob, linear->array[i], *probe) < 0;
+	   probe = chain_end)
+	{
+	  chain_end = (fde **) erratic->array[probe - linear->array];
+	  erratic->array[probe - linear->array] = NULL;
+	}
+      erratic->array[i] = (fde *) chain_end;
       chain_end = &linear->array[i];
     }
 
@@ -490,11 +512,11 @@ frame_heapsort (struct object *ob, fde_compare_t fde_compare,
 {
   /* For a description of this algorithm, see:
      Samuel P. Harbison, Guy L. Steele Jr.: C, a reference manual, 2nd ed.,
-     p. 60-61. */
+     p. 60-61.  */
   fde ** a = erratic->array;
   /* A portion of the array is called a "heap" if for all i>=0:
      If i and 2i+1 are valid indices, then a[i] >= a[2i+1].
-     If i and 2i+2 are valid indices, then a[i] >= a[2i+2]. */
+     If i and 2i+2 are valid indices, then a[i] >= a[2i+2].  */
 #define SWAP(x,y) do { fde * tmp = x; x = y; y = tmp; } while (0)
   size_t n = erratic->count;
   size_t m = n;
@@ -502,53 +524,53 @@ frame_heapsort (struct object *ob, fde_compare_t fde_compare,
 
   while (m > 0)
     {
-      /* Invariant: a[m..n-1] is a heap. */
+      /* Invariant: a[m..n-1] is a heap.  */
       m--;
       for (i = m; 2*i+1 < n; )
-        {
-          if (2*i+2 < n
-              && fde_compare (ob, a[2*i+2], a[2*i+1]) > 0
-              && fde_compare (ob, a[2*i+2], a[i]) > 0)
-            {
-              SWAP (a[i], a[2*i+2]);
-              i = 2*i+2;
-            }
-          else if (fde_compare (ob, a[2*i+1], a[i]) > 0)
-            {
-              SWAP (a[i], a[2*i+1]);
-              i = 2*i+1;
-            }
-          else
-            break;
-        }
+	{
+	  if (2*i+2 < n
+	      && fde_compare (ob, a[2*i+2], a[2*i+1]) > 0
+	      && fde_compare (ob, a[2*i+2], a[i]) > 0)
+	    {
+	      SWAP (a[i], a[2*i+2]);
+	      i = 2*i+2;
+	    }
+	  else if (fde_compare (ob, a[2*i+1], a[i]) > 0)
+	    {
+	      SWAP (a[i], a[2*i+1]);
+	      i = 2*i+1;
+	    }
+	  else
+	    break;
+	}
     }
   while (n > 1)
     {
-      /* Invariant: a[0..n-1] is a heap. */
+      /* Invariant: a[0..n-1] is a heap.  */
       n--;
       SWAP (a[0], a[n]);
       for (i = 0; 2*i+1 < n; )
-        {
-          if (2*i+2 < n
-              && fde_compare (ob, a[2*i+2], a[2*i+1]) > 0
-              && fde_compare (ob, a[2*i+2], a[i]) > 0)
-            {
-              SWAP (a[i], a[2*i+2]);
-              i = 2*i+2;
-            }
-          else if (fde_compare (ob, a[2*i+1], a[i]) > 0)
-            {
-              SWAP (a[i], a[2*i+1]);
-              i = 2*i+1;
-            }
-          else
-            break;
-        }
+	{
+	  if (2*i+2 < n
+	      && fde_compare (ob, a[2*i+2], a[2*i+1]) > 0
+	      && fde_compare (ob, a[2*i+2], a[i]) > 0)
+	    {
+	      SWAP (a[i], a[2*i+2]);
+	      i = 2*i+2;
+	    }
+	  else if (fde_compare (ob, a[2*i+1], a[i]) > 0)
+	    {
+	      SWAP (a[i], a[2*i+1]);
+	      i = 2*i+1;
+	    }
+	  else
+	    break;
+	}
     }
 #undef SWAP
 }
 
-/* Merge V1 and V2, both sorted, and put the result into V1. */
+/* Merge V1 and V2, both sorted, and put the result into V1.  */
 static inline void
 fde_merge (struct object *ob, fde_compare_t fde_compare,
 	   struct fde_vector *v1, struct fde_vector *v2)
@@ -560,16 +582,18 @@ fde_merge (struct object *ob, fde_compare_t fde_compare,
   if (i2 > 0)
     {
       i1 = v1->count;
-      do {
-        i2--;
-        fde2 = v2->array[i2];
-        while (i1 > 0 && fde_compare (ob, v1->array[i1-1], fde2) > 0)
-          {
-            v1->array[i1+i2] = v1->array[i1-1];
-            i1--;
-          }
-        v1->array[i1+i2] = fde2;
-      } while (i2 > 0);
+      do
+	{
+	  i2--;
+	  fde2 = v2->array[i2];
+	  while (i1 > 0 && fde_compare (ob, v1->array[i1-1], fde2) > 0)
+	    {
+	      v1->array[i1+i2] = v1->array[i1-1];
+	      i1--;
+	    }
+	  v1->array[i1+i2] = fde2;
+	}
+      while (i2 > 0);
       v1->count += v2->count;
     }
 }
@@ -619,7 +643,7 @@ classify_object_over_fdes (struct object *ob, fde *this_fde)
   int encoding = DW_EH_PE_absptr;
   _Unwind_Ptr base = 0;
 
-  for (; this_fde->length != 0; this_fde = next_fde (this_fde))
+  for (; ! last_fde (ob, this_fde); this_fde = next_fde (this_fde))
     {
       struct dwarf_cie *this_cie;
       _Unwind_Ptr mask, pc_begin;
@@ -659,8 +683,8 @@ classify_object_over_fdes (struct object *ob, fde *this_fde)
 	continue;
 
       count += 1;
-      if ((void *)pc_begin < ob->pc_begin)
-	ob->pc_begin = (void *)pc_begin;
+      if ((void *) pc_begin < ob->pc_begin)
+	ob->pc_begin = (void *) pc_begin;
     }
 
   return count;
@@ -673,7 +697,7 @@ add_fdes (struct object *ob, struct fde_accumulator *accu, fde *this_fde)
   int encoding = ob->s.b.encoding;
   _Unwind_Ptr base = base_from_object (ob->s.b.encoding, ob);
 
-  for (; this_fde->length != 0; this_fde = next_fde (this_fde))
+  for (; ! last_fde (ob, this_fde); this_fde = next_fde (this_fde))
     {
       struct dwarf_cie *this_cie;
 
@@ -696,7 +720,7 @@ add_fdes (struct object *ob, struct fde_accumulator *accu, fde *this_fde)
 
       if (encoding == DW_EH_PE_absptr)
 	{
-	  if (*(_Unwind_Ptr *)this_fde->pc_begin == 0)
+	  if (*(_Unwind_Ptr *) this_fde->pc_begin == 0)
 	    continue;
 	}
       else
@@ -764,7 +788,7 @@ init_object (struct object* ob)
     {
       fde **p;
       for (p = ob->u.array; *p; ++p)
-        add_fdes (ob, &accu, *p);
+	add_fdes (ob, &accu, *p);
     }
   else
     add_fdes (ob, &accu, ob->u.single);
@@ -790,7 +814,7 @@ linear_search_fdes (struct object *ob, fde *this_fde, void *pc)
   int encoding = ob->s.b.encoding;
   _Unwind_Ptr base = base_from_object (ob->s.b.encoding, ob);
 
-  for (; this_fde->length != 0; this_fde = next_fde (this_fde))
+  for (; ! last_fde (ob, this_fde); this_fde = next_fde (this_fde))
     {
       struct dwarf_cie *this_cie;
       _Unwind_Ptr pc_begin, pc_range;
@@ -814,8 +838,8 @@ linear_search_fdes (struct object *ob, fde *this_fde, void *pc)
 
       if (encoding == DW_EH_PE_absptr)
 	{
-	  pc_begin = ((_Unwind_Ptr *)this_fde->pc_begin)[0];
-	  pc_range = ((_Unwind_Ptr *)this_fde->pc_begin)[1];
+	  pc_begin = ((_Unwind_Ptr *) this_fde->pc_begin)[0];
+	  pc_range = ((_Unwind_Ptr *) this_fde->pc_begin)[1];
 	  if (pc_begin == 0)
 	    continue;
 	}
@@ -842,8 +866,8 @@ linear_search_fdes (struct object *ob, fde *this_fde, void *pc)
 	    continue;
 	}
 
-      if ((_Unwind_Ptr)pc - pc_begin < pc_range)
-        return this_fde;
+      if ((_Unwind_Ptr) pc - pc_begin < pc_range)
+	return this_fde;
     }
 
   return NULL;
@@ -865,8 +889,8 @@ binary_search_unencoded_fdes (struct object *ob, void *pc)
       void *pc_begin;
       uaddr pc_range;
 
-      pc_begin = ((void **)f->pc_begin)[0];
-      pc_range = ((uaddr *)f->pc_begin)[1];
+      pc_begin = ((void **) f->pc_begin)[0];
+      pc_range = ((uaddr *) f->pc_begin)[1];
 
       if (pc < pc_begin)
 	hi = i;
@@ -898,9 +922,9 @@ binary_search_single_encoding_fdes (struct object *ob, void *pc)
 					&pc_begin);
       read_encoded_value_with_base (encoding & 0x0F, 0, p, &pc_range);
 
-      if ((_Unwind_Ptr)pc < pc_begin)
+      if ((_Unwind_Ptr) pc < pc_begin)
 	hi = i;
-      else if ((_Unwind_Ptr)pc >= pc_begin + pc_range)
+      else if ((_Unwind_Ptr) pc >= pc_begin + pc_range)
 	lo = i + 1;
       else
 	return f;
@@ -929,9 +953,9 @@ binary_search_mixed_encoding_fdes (struct object *ob, void *pc)
 					f->pc_begin, &pc_begin);
       read_encoded_value_with_base (encoding & 0x0F, 0, p, &pc_range);
 
-      if ((_Unwind_Ptr)pc < pc_begin)
+      if ((_Unwind_Ptr) pc < pc_begin)
 	hi = i;
-      else if ((_Unwind_Ptr)pc >= pc_begin + pc_range)
+      else if ((_Unwind_Ptr) pc >= pc_begin + pc_range)
 	lo = i + 1;
       else
 	return f;
@@ -969,14 +993,14 @@ search_object (struct object* ob, void *pc)
     {
       /* Long slow labourious linear search, cos we've no memory.  */
       if (ob->s.b.from_array)
-        {
-          fde **p;
+	{
+	  fde **p;
 	  for (p = ob->u.array; *p ; p++)
 	    {
 	      fde *f = linear_search_fdes (ob, *p, pc);
-              if (f)
+	      if (f)
 		return f;
-            }
+	    }
 	  return NULL;
 	}
       else
diff --git a/sysdeps/generic/unwind-dw2-fde.h b/sysdeps/generic/unwind-dw2-fde.h
index 83b4470ce5..4fc4836d2a 100644
--- a/sysdeps/generic/unwind-dw2-fde.h
+++ b/sysdeps/generic/unwind-dw2-fde.h
@@ -1,13 +1,14 @@
 /* Subroutines needed for unwinding stack frames for exception handling.  */
-/* Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
+   Free Software Foundation, Inc.
    Contributed by Jason Merrill <jason@cygnus.com>.
 
-This file is part of GNU CC.
+This file is part of GCC.
 
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
 
 In addition to the permissions in the GNU General Public License, the
 Free Software Foundation gives you unlimited permission to link the
@@ -18,15 +19,15 @@ do apply in other respects; for example, they cover modification of
 the file, and distribution when not linked into a combine
 executable.)
 
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
 
 You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING.  If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA.  */
+along with GCC; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.  */
 
 
 struct fde_vector
@@ -57,12 +58,16 @@ struct object
       unsigned long mixed_encoding : 1;
       unsigned long encoding : 8;
       /* ??? Wish there was an easy way to detect a 64-bit host here;
-	 we've got 32 bits left to play with... */
+	 we've got 32 bits left to play with...  */
       unsigned long count : 21;
     } b;
     size_t i;
   } s;
 
+#ifdef DWARF2_OBJECT_END_PTR_EXTENSION
+  char *fde_end;
+#endif
+
   struct object *next;
 };
 #endif
@@ -116,7 +121,7 @@ typedef unsigned char ubyte;
    is located, and what the register lifetimes and stack layout are
    within the function.
 
-   The data structures are defined in the DWARF specfication, although
+   The data structures are defined in the DWARF specification, although
    not in a very readable way (see LITERATURE).
 
    Every time an exception is thrown, the code needs to locate the FDE
@@ -125,7 +130,7 @@ typedef unsigned char ubyte;
    a) in a linear search, find the shared image (i.e. DLL) containing
       the PC
    b) using the FDE table for that shared object, locate the FDE using
-      binary search (which requires the sorting).  */   
+      binary search (which requires the sorting).  */
 
 /* The first few fields of a CIE.  The CIE_id field is 0 for a CIE,
    to distinguish it from a valid FDE.  FDEs are aligned to an addressing
@@ -159,7 +164,17 @@ get_cie (struct dwarf_fde *f)
 static inline fde *
 next_fde (fde *f)
 {
-  return (fde *)((char *)f + f->length + sizeof (f->length));
+  return (fde *) ((char *) f + f->length + sizeof (f->length));
 }
 
 extern fde * _Unwind_Find_FDE (void *, struct dwarf_eh_bases *);
+
+static inline int
+last_fde (struct object *obj __attribute__ ((__unused__)), fde *f)
+{
+#ifdef DWARF2_OBJECT_END_PTR_EXTENSION
+  return (char *)f == obj->fde_end || f->length == 0;
+#else
+  return f->length == 0;
+#endif
+}
diff --git a/sysdeps/generic/unwind-dw2.c b/sysdeps/generic/unwind-dw2.c
index 3a53156621..720034427d 100644
--- a/sysdeps/generic/unwind-dw2.c
+++ b/sysdeps/generic/unwind-dw2.c
@@ -1,22 +1,23 @@
 /* DWARF2 exception handling and frame unwind runtime interface routines.
-   Copyright (C) 1997,1998,1999,2000,2001,2003 Free Software Foundation, Inc.
+   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
+   Free Software Foundation, Inc.
 
-   This file is part of GNU CC.
+   This file is part of GCC.
 
-   GNU CC is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2, or (at your option)
    any later version.
 
-   GNU CC is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
+   GCC is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+   License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with GNU CC; see the file COPYING.  If not, write to
-   the Free Software Foundation, 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   along with GCC; see the file COPYING.  If not, write to the Free
+   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
 
 #ifdef _LIBC
 #include <stdlib.h>
@@ -37,7 +38,8 @@
 #include "gthr.h"
 #endif
 
-#if !USING_SJLJ_EXCEPTIONS
+
+#ifndef __USING_SJLJ_EXCEPTIONS__
 
 #ifndef STACK_GROWS_DOWNWARD
 #define STACK_GROWS_DOWNWARD 0
@@ -52,7 +54,14 @@
 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
 #endif
 
-/* This is the register and unwind state for a particular frame.  */
+/* Dwarf frame registers used for pre gcc 3.0 compiled glibc.  */
+#ifndef PRE_GCC3_DWARF_FRAME_REGISTERS
+#define PRE_GCC3_DWARF_FRAME_REGISTERS DWARF_FRAME_REGISTERS
+#endif
+
+/* This is the register and unwind state for a particular frame.  This
+   provides the information necessary to unwind up past a frame and return
+   to its caller.  */
 struct _Unwind_Context
 {
   void *reg[DWARF_FRAME_REGISTERS+1];
@@ -80,7 +89,7 @@ typedef struct
   {
     struct {
       union {
-	unsigned int reg;
+	_Unwind_Word reg;
 	_Unwind_Sword offset;
 	const unsigned char *exp;
       } loc;
@@ -112,8 +121,8 @@ typedef struct
 
   /* The information we care about from the CIE/FDE.  */
   _Unwind_Personality_Fn personality;
-  signed int data_align;
-  unsigned int code_align;
+  _Unwind_Sword data_align;
+  _Unwind_Word code_align;
   unsigned char retaddr_column;
   unsigned char fde_encoding;
   unsigned char lsda_encoding;
@@ -138,10 +147,10 @@ static inline void *
 read_pointer (const void *p) { const union unaligned *up = p; return up->p; }
 
 static inline int
-read_1u (const void *p) { return *(const unsigned char *)p; }
+read_1u (const void *p) { return *(const unsigned char *) p; }
 
 static inline int
-read_1s (const void *p) { return *(const signed char *)p; }
+read_1s (const void *p) { return *(const signed char *) p; }
 
 static inline int
 read_2u (const void *p) { const union unaligned *up = p; return up->u2; }
@@ -170,6 +179,14 @@ _Unwind_GetGR (struct _Unwind_Context *context, int index)
   return * (_Unwind_Word *) context->reg[index];
 }
 
+/* Get the value of the CFA as saved in CONTEXT.  */
+
+_Unwind_Word
+_Unwind_GetCFA (struct _Unwind_Context *context)
+{
+  return context->cfa;
+}
+
 /* Overwrite the saved value for register REG in CONTEXT with VAL.  */
 
 inline void
@@ -206,6 +223,17 @@ _Unwind_GetRegionStart (struct _Unwind_Context *context)
   return (_Unwind_Ptr) context->bases.func;
 }
 
+void *
+_Unwind_FindEnclosingFunction (void *pc)
+{
+  struct dwarf_eh_bases bases;
+  struct dwarf_fde *fde = _Unwind_Find_FDE (pc-1, &bases);
+  if (fde)
+    return bases.func;
+  else
+    return NULL;
+}
+
 #ifndef __ia64__
 _Unwind_Ptr
 _Unwind_GetDataRelBase (struct _Unwind_Context *context)
@@ -231,7 +259,7 @@ extract_cie_info (struct dwarf_cie *cie, struct _Unwind_Context *context,
   const unsigned char *aug = cie->augmentation;
   const unsigned char *p = aug + strlen (aug) + 1;
   const unsigned char *ret = NULL;
-  _Unwind_Ptr tmp;
+  _Unwind_Word utmp;
 
   /* g++ v2 "eh" has pointer immediately following augmentation string,
      so it must be handled first.  */
@@ -244,8 +272,8 @@ extract_cie_info (struct dwarf_cie *cie, struct _Unwind_Context *context,
 
   /* Immediately following the augmentation are the code and
      data alignment and return address column.  */
-  p = read_uleb128 (p, &tmp); fs->code_align = tmp;
-  p = read_sleb128 (p, &tmp); fs->data_align = (saddr) tmp;
+  p = read_uleb128 (p, &fs->code_align);
+  p = read_sleb128 (p, &fs->data_align);
   fs->retaddr_column = *p++;
   fs->lsda_encoding = DW_EH_PE_omit;
 
@@ -254,8 +282,8 @@ extract_cie_info (struct dwarf_cie *cie, struct _Unwind_Context *context,
      the size.  */
   if (*aug == 'z')
     {
-      p = read_uleb128 (p, &tmp);
-      ret = p + tmp;
+      p = read_uleb128 (p, &utmp);
+      ret = p + utmp;
 
       fs->saw_z = 1;
       ++aug;
@@ -303,7 +331,7 @@ static _Unwind_Word
 execute_stack_op (const unsigned char *op_ptr, const unsigned char *op_end,
 		  struct _Unwind_Context *context, _Unwind_Word initial)
 {
-  _Unwind_Word stack[64];	/* ??? Assume this is enough. */
+  _Unwind_Word stack[64];	/* ??? Assume this is enough.  */
   int stack_elt;
 
   stack[0] = initial;
@@ -312,9 +340,8 @@ execute_stack_op (const unsigned char *op_ptr, const unsigned char *op_end,
   while (op_ptr < op_end)
     {
       enum dwarf_location_atom op = *op_ptr++;
-      _Unwind_Word result = 0, reg;
-      _Unwind_Sword offset;
-      _Unwind_Ptr ptrtmp;
+      _Unwind_Word result, reg, utmp;
+      _Unwind_Sword offset, stmp;
 
       switch (op)
 	{
@@ -391,12 +418,11 @@ execute_stack_op (const unsigned char *op_ptr, const unsigned char *op_end,
 	  op_ptr += 8;
 	  break;
 	case DW_OP_constu:
-	  op_ptr = read_uleb128 (op_ptr, &ptrtmp);
-	  result = ptrtmp;
+	  op_ptr = read_uleb128 (op_ptr, &result);
 	  break;
 	case DW_OP_consts:
-	  op_ptr = read_sleb128 (op_ptr, &ptrtmp);
-	  result = (saddr)ptrtmp;
+	  op_ptr = read_sleb128 (op_ptr, &stmp);
+	  result = stmp;
 	  break;
 
 	case DW_OP_reg0:
@@ -434,7 +460,7 @@ execute_stack_op (const unsigned char *op_ptr, const unsigned char *op_end,
 	  result = _Unwind_GetGR (context, op - DW_OP_reg0);
 	  break;
 	case DW_OP_regx:
-	  op_ptr = read_uleb128 (op_ptr, &ptrtmp); reg = ptrtmp;
+	  op_ptr = read_uleb128 (op_ptr, &reg);
 	  result = _Unwind_GetGR (context, reg);
 	  break;
 
@@ -470,12 +496,12 @@ execute_stack_op (const unsigned char *op_ptr, const unsigned char *op_end,
 	case DW_OP_breg29:
 	case DW_OP_breg30:
 	case DW_OP_breg31:
-	  op_ptr = read_sleb128 (op_ptr, &ptrtmp); offset = (saddr)ptrtmp;
+	  op_ptr = read_sleb128 (op_ptr, &offset);
 	  result = _Unwind_GetGR (context, op - DW_OP_breg0) + offset;
 	  break;
 	case DW_OP_bregx:
-	  op_ptr = read_uleb128 (op_ptr, &ptrtmp); reg = ptrtmp;
-	  op_ptr = read_sleb128 (op_ptr, &ptrtmp); offset = (saddr)ptrtmp;
+	  op_ptr = read_uleb128 (op_ptr, &reg);
+	  op_ptr = read_sleb128 (op_ptr, &offset);
 	  result = _Unwind_GetGR (context, reg) + offset;
 	  break;
 
@@ -533,14 +559,14 @@ execute_stack_op (const unsigned char *op_ptr, const unsigned char *op_end,
 	    {
 	    case DW_OP_deref:
 	      {
-		void *ptr = (void *)(_Unwind_Ptr) result;
+		void *ptr = (void *) (_Unwind_Ptr) result;
 		result = (_Unwind_Ptr) read_pointer (ptr);
 	      }
 	      break;
 
 	    case DW_OP_deref_size:
 	      {
-		void *ptr = (void *)(_Unwind_Ptr) result;
+		void *ptr = (void *) (_Unwind_Ptr) result;
 		switch (*op_ptr++)
 		  {
 		  case 1:
@@ -572,12 +598,12 @@ execute_stack_op (const unsigned char *op_ptr, const unsigned char *op_end,
 	      result = ~result;
 	      break;
 	    case DW_OP_plus_uconst:
-	      op_ptr = read_uleb128 (op_ptr, &ptrtmp); reg = ptrtmp;
-	      result += reg;
+	      op_ptr = read_uleb128 (op_ptr, &utmp);
+	      result += utmp;
 	      break;
-	    /* Avoid warnings.  */
+
 	    default:
-	      break;
+	      abort ();
 	    }
 	  break;
 
@@ -597,68 +623,68 @@ execute_stack_op (const unsigned char *op_ptr, const unsigned char *op_end,
 	  {
 	    /* Binary operations.  */
 	    _Unwind_Word first, second;
-	  if ((stack_elt -= 2) < 0)
-	    abort ();
-	  second = stack[stack_elt];
-	  first = stack[stack_elt + 1];
+	    if ((stack_elt -= 2) < 0)
+	      abort ();
+	    second = stack[stack_elt];
+	    first = stack[stack_elt + 1];
 
-	  switch (op)
-	    {
-	    case DW_OP_and:
-	      result = second & first;
-	      break;
-	    case DW_OP_div:
-	      result = (_Unwind_Sword)second / (_Unwind_Sword)first;
-	      break;
-	    case DW_OP_minus:
-	      result = second - first;
-	      break;
-	    case DW_OP_mod:
-	      result = (_Unwind_Sword)second % (_Unwind_Sword)first;
-	      break;
-	    case DW_OP_mul:
-	      result = second * first;
-	      break;
-	    case DW_OP_or:
-	      result = second | first;
-	      break;
-	    case DW_OP_plus:
-	      result = second + first;
-	      break;
-	    case DW_OP_shl:
-	      result = second << first;
-	      break;
-	    case DW_OP_shr:
-	      result = second >> first;
-	      break;
-	    case DW_OP_shra:
-	      result = (_Unwind_Sword)second >> first;
-	      break;
-	    case DW_OP_xor:
-	      result = second ^ first;
-	      break;
-	    case DW_OP_le:
-	      result = (_Unwind_Sword)first <= (_Unwind_Sword)second;
-	      break;
-	    case DW_OP_ge:
-	      result = (_Unwind_Sword)first >= (_Unwind_Sword)second;
-	      break;
-	    case DW_OP_eq:
-	      result = (_Unwind_Sword)first == (_Unwind_Sword)second;
-	      break;
-	    case DW_OP_lt:
-	      result = (_Unwind_Sword)first < (_Unwind_Sword)second;
-	      break;
-	    case DW_OP_gt:
-	      result = (_Unwind_Sword)first > (_Unwind_Sword)second;
-	      break;
-	    case DW_OP_ne:
-	      result = (_Unwind_Sword)first != (_Unwind_Sword)second;
-	      break;
-	    default:
-	      /* Avoid warnings.  */
-	      break;
-	    }
+	    switch (op)
+	      {
+	      case DW_OP_and:
+		result = second & first;
+		break;
+	      case DW_OP_div:
+		result = (_Unwind_Sword) second / (_Unwind_Sword) first;
+		break;
+	      case DW_OP_minus:
+		result = second - first;
+		break;
+	      case DW_OP_mod:
+		result = (_Unwind_Sword) second % (_Unwind_Sword) first;
+		break;
+	      case DW_OP_mul:
+		result = second * first;
+		break;
+	      case DW_OP_or:
+		result = second | first;
+		break;
+	      case DW_OP_plus:
+		result = second + first;
+		break;
+	      case DW_OP_shl:
+		result = second << first;
+		break;
+	      case DW_OP_shr:
+		result = second >> first;
+		break;
+	      case DW_OP_shra:
+		result = (_Unwind_Sword) second >> first;
+		break;
+	      case DW_OP_xor:
+		result = second ^ first;
+		break;
+	      case DW_OP_le:
+		result = (_Unwind_Sword) first <= (_Unwind_Sword) second;
+		break;
+	      case DW_OP_ge:
+		result = (_Unwind_Sword) first >= (_Unwind_Sword) second;
+		break;
+	      case DW_OP_eq:
+		result = (_Unwind_Sword) first == (_Unwind_Sword) second;
+		break;
+	      case DW_OP_lt:
+		result = (_Unwind_Sword) first < (_Unwind_Sword) second;
+		break;
+	      case DW_OP_gt:
+		result = (_Unwind_Sword) first > (_Unwind_Sword) second;
+		break;
+	      case DW_OP_ne:
+		result = (_Unwind_Sword) first != (_Unwind_Sword) second;
+		break;
+
+	      default:
+		abort ();
+	      }
 	  }
 	  break;
 
@@ -714,20 +740,26 @@ execute_cfa_program (const unsigned char *insn_ptr,
   /* Don't allow remember/restore between CIE and FDE programs.  */
   fs->regs.prev = NULL;
 
+  /* The comparison with the return address uses < rather than <= because
+     we are only interested in the effects of code before the call; for a
+     noreturn function, the return address may point to unrelated code with
+     a different stack configuration that we are not interested in.  We
+     assume that the call itself is unwind info-neutral; if not, or if
+     there are delay instructions that adjust the stack, these must be
+     reflected at the point immediately before the call insn.  */
   while (insn_ptr < insn_end && fs->pc < context->ra)
     {
       unsigned char insn = *insn_ptr++;
-      _Unwind_Word reg;
-      _Unwind_Sword offset;
-      _Unwind_Ptr ptrtmp;
+      _Unwind_Word reg, utmp;
+      _Unwind_Sword offset, stmp;
 
       if ((insn & 0xc0) == DW_CFA_advance_loc)
 	fs->pc += (insn & 0x3f) * fs->code_align;
       else if ((insn & 0xc0) == DW_CFA_offset)
 	{
 	  reg = insn & 0x3f;
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp);
-	  offset = ptrtmp * fs->data_align;
+	  insn_ptr = read_uleb128 (insn_ptr, &utmp);
+	  offset = (_Unwind_Sword) utmp * fs->data_align;
 	  fs->regs.reg[reg].how = REG_SAVED_OFFSET;
 	  fs->regs.reg[reg].loc.offset = offset;
 	}
@@ -757,28 +789,31 @@ execute_cfa_program (const unsigned char *insn_ptr,
 	  break;
 
 	case DW_CFA_offset_extended:
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp); reg = ptrtmp;
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp);
-	  offset = ptrtmp * fs->data_align;
+	  insn_ptr = read_uleb128 (insn_ptr, &reg);
+	  insn_ptr = read_uleb128 (insn_ptr, &utmp);
+	  offset = (_Unwind_Sword) utmp * fs->data_align;
 	  fs->regs.reg[reg].how = REG_SAVED_OFFSET;
 	  fs->regs.reg[reg].loc.offset = offset;
 	  break;
 
 	case DW_CFA_restore_extended:
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp); reg = ptrtmp;
+	  insn_ptr = read_uleb128 (insn_ptr, &reg);
 	  fs->regs.reg[reg].how = REG_UNSAVED;
 	  break;
 
 	case DW_CFA_undefined:
 	case DW_CFA_same_value:
+	  insn_ptr = read_uleb128 (insn_ptr, &reg);
+	  break;
+
 	case DW_CFA_nop:
 	  break;
 
 	case DW_CFA_register:
 	  {
 	    _Unwind_Word reg2;
-	    insn_ptr = read_uleb128 (insn_ptr, &ptrtmp); reg = ptrtmp;
-	    insn_ptr = read_uleb128 (insn_ptr, &ptrtmp); reg2 = ptrtmp;
+	    insn_ptr = read_uleb128 (insn_ptr, &reg);
+	    insn_ptr = read_uleb128 (insn_ptr, &reg2);
 	    fs->regs.reg[reg].how = REG_SAVED_REG;
 	    fs->regs.reg[reg].loc.reg = reg2;
 	  }
@@ -793,7 +828,7 @@ execute_cfa_program (const unsigned char *insn_ptr,
 		unused_rs = unused_rs->prev;
 	      }
 	    else
-	      new_rs = alloca (sizeof (struct frame_state_reg_info));
+	      new_rs = __builtin_alloca (sizeof (struct frame_state_reg_info));
 
 	    *new_rs = fs->regs;
 	    fs->regs.prev = new_rs;
@@ -810,60 +845,55 @@ execute_cfa_program (const unsigned char *insn_ptr,
 	  break;
 
 	case DW_CFA_def_cfa:
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp);
-	  fs->cfa_reg = ptrtmp;
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp);
-	  fs->cfa_offset = ptrtmp;
+	  insn_ptr = read_uleb128 (insn_ptr, &fs->cfa_reg);
+	  insn_ptr = read_uleb128 (insn_ptr, &utmp);
+	  fs->cfa_offset = utmp;
 	  fs->cfa_how = CFA_REG_OFFSET;
 	  break;
 
 	case DW_CFA_def_cfa_register:
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp);
-	  fs->cfa_reg = ptrtmp;
+	  insn_ptr = read_uleb128 (insn_ptr, &fs->cfa_reg);
 	  fs->cfa_how = CFA_REG_OFFSET;
 	  break;
 
 	case DW_CFA_def_cfa_offset:
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp);
-	  fs->cfa_offset = ptrtmp;
+	  insn_ptr = read_uleb128 (insn_ptr, &utmp);
+	  fs->cfa_offset = utmp;
 	  /* cfa_how deliberately not set.  */
 	  break;
 
 	case DW_CFA_def_cfa_expression:
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp);
+	  insn_ptr = read_uleb128 (insn_ptr, &utmp);
 	  fs->cfa_exp = insn_ptr;
 	  fs->cfa_how = CFA_EXP;
-	  insn_ptr += ptrtmp;
+	  insn_ptr += utmp;
 	  break;
 
 	case DW_CFA_expression:
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp); reg = ptrtmp;
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp);
+	  insn_ptr = read_uleb128 (insn_ptr, &reg);
+	  insn_ptr = read_uleb128 (insn_ptr, &utmp);
 	  fs->regs.reg[reg].how = REG_SAVED_EXP;
 	  fs->regs.reg[reg].loc.exp = insn_ptr;
-	  insn_ptr += ptrtmp;
+	  insn_ptr += utmp;
 	  break;
 
 	  /* From the 2.1 draft.  */
 	case DW_CFA_offset_extended_sf:
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp); reg = ptrtmp;
-	  insn_ptr = read_sleb128 (insn_ptr, &ptrtmp);
-	  offset = (saddr)ptrtmp * fs->data_align;
+	  insn_ptr = read_uleb128 (insn_ptr, &reg);
+	  insn_ptr = read_sleb128 (insn_ptr, &stmp);
+	  offset = stmp * fs->data_align;
 	  fs->regs.reg[reg].how = REG_SAVED_OFFSET;
 	  fs->regs.reg[reg].loc.offset = offset;
 	  break;
 
 	case DW_CFA_def_cfa_sf:
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp);
-	  fs->cfa_reg = ptrtmp;
-	  insn_ptr = read_sleb128 (insn_ptr, &ptrtmp);
-	  fs->cfa_offset = (saddr)ptrtmp;
+	  insn_ptr = read_uleb128 (insn_ptr, &fs->cfa_reg);
+	  insn_ptr = read_sleb128 (insn_ptr, &fs->cfa_offset);
 	  fs->cfa_how = CFA_REG_OFFSET;
 	  break;
 
 	case DW_CFA_def_cfa_offset_sf:
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp);
-	  fs->cfa_offset = ptrtmp;
+	  insn_ptr = read_sleb128 (insn_ptr, &fs->cfa_offset);
 	  /* cfa_how deliberately not set.  */
 	  break;
 
@@ -877,16 +907,15 @@ execute_cfa_program (const unsigned char *insn_ptr,
 	  break;
 
 	case DW_CFA_GNU_args_size:
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp);
-	  context->args_size = ptrtmp;
+	  insn_ptr = read_uleb128 (insn_ptr, &context->args_size);
 	  break;
 
 	case DW_CFA_GNU_negative_offset_extended:
 	  /* Obsoleted by DW_CFA_offset_extended_sf, but used by
 	     older PowerPC code.  */
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp); reg = ptrtmp;
-	  insn_ptr = read_uleb128 (insn_ptr, &ptrtmp);
-	  offset = ptrtmp * fs->data_align;
+	  insn_ptr = read_uleb128 (insn_ptr, &reg);
+	  insn_ptr = read_uleb128 (insn_ptr, &utmp);
+	  offset = (_Unwind_Word) utmp * fs->data_align;
 	  fs->regs.reg[reg].how = REG_SAVED_OFFSET;
 	  fs->regs.reg[reg].loc.offset = -offset;
 	  break;
@@ -897,6 +926,11 @@ execute_cfa_program (const unsigned char *insn_ptr,
     }
 }
 
+/* Given the _Unwind_Context CONTEXT for a stack frame, look up the FDE for
+   its caller and decode it into FS.  This function also sets the
+   args_size and lsda members of CONTEXT, as they are really information
+   about the caller's frame.  */
+
 static _Unwind_Reason_Code
 uw_frame_state_for (struct _Unwind_Context *context, _Unwind_FrameState *fs)
 {
@@ -913,7 +947,7 @@ uw_frame_state_for (struct _Unwind_Context *context, _Unwind_FrameState *fs)
     {
       /* Couldn't find frame unwind info for this function.  Try a
 	 target-specific fallback mechanism.  This will necessarily
-	 not profide a personality routine or LSDA.  */
+	 not provide a personality routine or LSDA.  */
 #ifdef MD_FALLBACK_FRAME_STATE_FOR
       MD_FALLBACK_FRAME_STATE_FOR (context, fs, success);
       return _URC_END_OF_STACK;
@@ -937,12 +971,12 @@ uw_frame_state_for (struct _Unwind_Context *context, _Unwind_FrameState *fs)
   execute_cfa_program (insn, end, context, fs);
 
   /* Locate augmentation for the fde.  */
-  aug = (unsigned char *)fde + sizeof (*fde);
+  aug = (unsigned char *) fde + sizeof (*fde);
   aug += 2 * size_of_encoded_value (fs->fde_encoding);
   insn = NULL;
   if (fs->saw_z)
     {
-      _Unwind_Ptr i;
+      _Unwind_Word i;
       aug = read_uleb128 (aug, &i);
       insn = aug + i;
     }
@@ -965,10 +999,10 @@ typedef struct frame_state
   void *eh_ptr;
   long cfa_offset;
   long args_size;
-  long reg_or_offset[DWARF_FRAME_REGISTERS+1];
+  long reg_or_offset[PRE_GCC3_DWARF_FRAME_REGISTERS+1];
   unsigned short cfa_reg;
   unsigned short retaddr_column;
-  char saved[DWARF_FRAME_REGISTERS+1];
+  char saved[PRE_GCC3_DWARF_FRAME_REGISTERS+1];
 } frame_state;
 
 #ifndef STATIC
@@ -1001,7 +1035,7 @@ __frame_state_for (void *pc_target, struct frame_state *state_in)
   if (fs.cfa_how == CFA_EXP)
     return 0;
 
-  for (reg = 0; reg < DWARF_FRAME_REGISTERS + 1; reg++)
+  for (reg = 0; reg < PRE_GCC3_DWARF_FRAME_REGISTERS + 1; reg++)
     {
       state_in->saved[reg] = fs.regs.reg[reg].how;
       switch (state_in->saved[reg])
@@ -1059,7 +1093,7 @@ uw_update_context_1 (struct _Unwind_Context *context, _Unwind_FrameState *fs)
 	 that this will not be a problem.  */
       {
 	const unsigned char *exp = fs->cfa_exp;
-	_Unwind_Ptr len;
+	_Unwind_Word len;
 
 	exp = read_uleb128 (exp, &len);
 	cfa = (void *) (_Unwind_Ptr)
@@ -1087,7 +1121,7 @@ uw_update_context_1 (struct _Unwind_Context *context, _Unwind_FrameState *fs)
       case REG_SAVED_EXP:
 	{
 	  const unsigned char *exp = fs->regs.reg[i].loc.exp;
-	  _Unwind_Ptr len;
+	  _Unwind_Word len;
 	  _Unwind_Ptr val;
 
 	  exp = read_uleb128 (exp, &len);
@@ -1099,6 +1133,11 @@ uw_update_context_1 (struct _Unwind_Context *context, _Unwind_FrameState *fs)
       }
 }
 
+/* CONTEXT describes the unwind state for a frame, and FS describes the FDE
+   of its caller.  Update CONTEXT to refer to the caller as well.  Note
+   that the args_size and lsda members are not updated here, but later in
+   uw_frame_state_for.  */
+
 static void
 uw_update_context (struct _Unwind_Context *context, _Unwind_FrameState *fs)
 {
@@ -1113,14 +1152,16 @@ uw_update_context (struct _Unwind_Context *context, _Unwind_FrameState *fs)
 /* Fill in CONTEXT for top-of-stack.  The only valid registers at this
    level will be the return address and the CFA.  */
 
-#define uw_init_context(CONTEXT)					\
-do {									\
-  /* Do any necessary initialization to access arbitrary stack frames.	\
-     On the SPARC, this means flushing the register windows.  */	\
-  __builtin_unwind_init ();						\
-  uw_init_context_1 (CONTEXT, __builtin_dwarf_cfa (),			\
-		     __builtin_return_address (0));			\
-} while (0)
+#define uw_init_context(CONTEXT)					   \
+  do									   \
+    {									   \
+      /* Do any necessary initialization to access arbitrary stack frames. \
+	 On the SPARC, this means flushing the register windows.  */	   \
+      __builtin_unwind_init ();						   \
+      uw_init_context_1 (CONTEXT, __builtin_dwarf_cfa (),		   \
+			 __builtin_return_address (0));			   \
+    }									   \
+  while (0)
 
 static void
 uw_init_context_1 (struct _Unwind_Context *context,
@@ -1154,12 +1195,14 @@ uw_init_context_1 (struct _Unwind_Context *context,
    macro because __builtin_eh_return must be invoked in the context of
    our caller.  */
 
-#define uw_install_context(CURRENT, TARGET)				\
-do {									\
-  long offset = uw_install_context_1 ((CURRENT), (TARGET));		\
-  void *handler = __builtin_frob_return_addr ((TARGET)->ra);		\
-  __builtin_eh_return (offset, handler);				\
-} while (0)
+#define uw_install_context(CURRENT, TARGET)				 \
+  do									 \
+    {									 \
+      long offset = uw_install_context_1 ((CURRENT), (TARGET));		 \
+      void *handler = __builtin_frob_return_addr ((TARGET)->ra);	 \
+      __builtin_eh_return (offset, handler);				 \
+    }									 \
+  while (0)
 
 static inline void
 init_dwarf_reg_size_table (void)
diff --git a/sysdeps/generic/unwind-pe.h b/sysdeps/generic/unwind-pe.h
index 9a031c1f32..f787392881 100644
--- a/sysdeps/generic/unwind-pe.h
+++ b/sysdeps/generic/unwind-pe.h
@@ -1,28 +1,28 @@
 /* Exception handling and frame unwind runtime interface routines.
    Copyright (C) 2001, 2002 Free Software Foundation, Inc.
 
-   This file is part of GNU CC.
+   This file is part of GCC.
 
-   GNU CC is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2, or (at your option)
    any later version.
 
-   GNU CC is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
+   GCC is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+   License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with GNU CC; see the file COPYING.  If not, write to
-   the Free Software Foundation, 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   along with GCC; see the file COPYING.  If not, write to the Free
+   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
 
 /* @@@ Really this should be out of line, but this also causes link
    compatibility problems with the base ABI.  This is slightly better
    than duplicating code, however.  */
 
-/* If using C++, references to abort have to be qualified with std::. */
+/* If using C++, references to abort have to be qualified with std::.  */
 #if __cplusplus
 #define __gxx_abort std::abort
 #else
@@ -66,10 +66,7 @@ extern const unsigned char *read_encoded_value_with_base
    This is only defined for fixed-size encodings, and so does not
    include leb128.  */
 
-#ifndef _LIBC
-static
-#endif
-unsigned int
+static unsigned int
 size_of_encoded_value (unsigned char encoding)
 #if defined(_LIBC) && !defined(NO_BASE_OF_ENCODED_VALUE)
 ;
@@ -125,14 +122,62 @@ base_of_encoded_value (unsigned char encoding, struct _Unwind_Context *context)
 
 #endif
 
+/* Read an unsigned leb128 value from P, store the value in VAL, return
+   P incremented past the value.  We assume that a word is large enough to
+   hold any value so encoded; if it is smaller than a pointer on some target,
+   pointers should not be leb128 encoded on that target.  */
+
+static const unsigned char *
+read_uleb128 (const unsigned char *p, _Unwind_Word *val)
+{
+  unsigned int shift = 0;
+  unsigned char byte;
+  _Unwind_Word result;
+
+  result = 0;
+  do
+    {
+      byte = *p++;
+      result |= (byte & 0x7f) << shift;
+      shift += 7;
+    }
+  while (byte & 0x80);
+
+  *val = result;
+  return p;
+}
+
+/* Similar, but read a signed leb128 value.  */
+
+static const unsigned char *
+read_sleb128 (const unsigned char *p, _Unwind_Sword *val)
+{
+  unsigned int shift = 0;
+  unsigned char byte;
+  _Unwind_Word result;
+
+  result = 0;
+  do
+    {
+      byte = *p++;
+      result |= (byte & 0x7f) << shift;
+      shift += 7;
+    }
+  while (byte & 0x80);
+
+  /* Sign-extend a negative value.  */
+  if (shift < 8 * sizeof(result) && (byte & 0x40) != 0)
+    result |= -(1L << shift);
+
+  *val = (_Unwind_Sword) result;
+  return p;
+}
+
 /* Load an encoded value from memory at P.  The value is returned in VAL;
    The function returns P incremented past the value.  BASE is as given
    by base_of_encoded_value for this encoding in the appropriate context.  */
 
-#ifndef _LIBC
-static
-#endif
-const unsigned char *
+static const unsigned char *
 read_encoded_value_with_base (unsigned char encoding, _Unwind_Ptr base,
 			      const unsigned char *p, _Unwind_Ptr *val)
 #if defined(_LIBC) && !defined(NO_BASE_OF_ENCODED_VALUE)
@@ -151,56 +196,37 @@ read_encoded_value_with_base (unsigned char encoding, _Unwind_Ptr base,
     } __attribute__((__packed__));
 
   union unaligned *u = (union unaligned *) p;
-  _Unwind_Ptr result;
+  _Unwind_Internal_Ptr result;
 
   if (encoding == DW_EH_PE_aligned)
     {
-      _Unwind_Ptr a = (_Unwind_Ptr)p;
+      _Unwind_Internal_Ptr a = (_Unwind_Internal_Ptr) p;
       a = (a + sizeof (void *) - 1) & - sizeof(void *);
-      result = *(_Unwind_Ptr *) a;
-      p = (const unsigned char *)(a + sizeof (void *));
+      result = *(_Unwind_Internal_Ptr *) a;
+      p = (const unsigned char *) (a + sizeof (void *));
     }
   else
     {
       switch (encoding & 0x0f)
 	{
 	case DW_EH_PE_absptr:
-	  result = (_Unwind_Ptr) u->ptr;
+	  result = (_Unwind_Internal_Ptr) u->ptr;
 	  p += sizeof (void *);
 	  break;
 
 	case DW_EH_PE_uleb128:
 	  {
-	    unsigned int shift = 0;
-	    unsigned char byte;
-
-	    result = 0;
-	    do
-	      {
-		byte = *p++;
-		result |= (_Unwind_Ptr)(byte & 0x7f) << shift;
-		shift += 7;
-	      }
-	    while (byte & 0x80);
+	    _Unwind_Word tmp;
+	    p = read_uleb128 (p, &tmp);
+	    result = (_Unwind_Internal_Ptr) tmp;
 	  }
 	  break;
 
 	case DW_EH_PE_sleb128:
 	  {
-	    unsigned int shift = 0;
-	    unsigned char byte;
-
-	    result = 0;
-	    do
-	      {
-		byte = *p++;
-		result |= (_Unwind_Ptr)(byte & 0x7f) << shift;
-		shift += 7;
-	      }
-	    while (byte & 0x80);
-
-	    if (shift < 8 * sizeof(result) && (byte & 0x40) != 0)
-	      result |= -(1L << shift);
+	    _Unwind_Sword tmp;
+	    p = read_sleb128 (p, &tmp);
+	    result = (_Unwind_Internal_Ptr) tmp;
 	  }
 	  break;
 
@@ -237,9 +263,9 @@ read_encoded_value_with_base (unsigned char encoding, _Unwind_Ptr base,
       if (result != 0)
 	{
 	  result += ((encoding & 0x70) == DW_EH_PE_pcrel
-		     ? (_Unwind_Ptr)u : base);
+		     ? (_Unwind_Internal_Ptr) u : base);
 	  if (encoding & DW_EH_PE_indirect)
-	    result = *(_Unwind_Ptr *)result;
+	    result = *(_Unwind_Internal_Ptr *) result;
 	}
     }
 
@@ -263,20 +289,3 @@ read_encoded_value (struct _Unwind_Context *context, unsigned char encoding,
 }
 
 #endif
-
-/* Read an unsigned leb128 value from P, store the value in VAL, return
-   P incremented past the value.  */
-
-static inline const unsigned char *
-read_uleb128 (const unsigned char *p, _Unwind_Ptr *val)
-{
-  return read_encoded_value_with_base (DW_EH_PE_uleb128, 0, p, val);
-}
-
-/* Similar, but read a signed leb128 value.  */
-
-static inline const unsigned char *
-read_sleb128 (const unsigned char *p, _Unwind_Ptr *val)
-{
-  return read_encoded_value_with_base (DW_EH_PE_sleb128, 0, p, val);
-}