[Bug other/48007] New: Unwind library doesn't work with UNITS_PER_WORD > sizeof (void *)

["hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48007

           Summary: Unwind library doesn't work with UNITS_PER_WORD >
                    sizeof (void *)
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hjl.tools@gmail.com


unwind-dw2.c has

/* 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];
  void *cfa;
  void *ra;
  void *lsda;
  struct dwarf_eh_bases bases;
  /* Signal frame context.  */
#define SIGNAL_FRAME_BIT ((~(_Unwind_Word) 0 >> 1) + 1)
  /* Context which has version/args_size/by_value fields.  */
#define EXTENDED_CONTEXT_BIT ((~(_Unwind_Word) 0 >> 2) + 1)
  _Unwind_Word flags;
  /* 0 for now, can be increased when further fields are added to
     struct _Unwind_Context.  */
  _Unwind_Word version;
  _Unwind_Word args_size;
  char by_value[DWARF_FRAME_REGISTERS+1];
};

We can't save an integer register in void * if its size > size of
void *.