[RFA/RFC] dwarf2-frame read_reg

[Michael Snyder <msnyder@redhat.com>]

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I want you guys to vett this change.  I was getting wrong results
on a target where sizeof (SP) != sizeof (void *).  The local func
read_reg was calling extract_unsigned_integer with the wrong size.




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2006-04-11  Michael Snyder  <msnyder@redhat.com>

	* dwarf2-frame.c (read_reg): Use register type instead of 
	builtin_data_pointer_type to extract register's value.

Index: dwarf2-frame.c
===================================================================
RCS file: /cvs/src/src/gdb/dwarf2-frame.c,v
retrieving revision 1.59
diff -p -r1.59 dwarf2-frame.c
*** dwarf2-frame.c	5 Apr 2006 20:01:19 -0000	1.59
--- dwarf2-frame.c	12 Apr 2006 03:30:08 -0000
*************** read_reg (void *baton, int reg)
*** 214,220 ****
  
    buf = alloca (register_size (gdbarch, regnum));
    frame_unwind_register (next_frame, regnum, buf);
!   return extract_typed_address (buf, builtin_type_void_data_ptr);
  }
  
  static void
--- 214,220 ----
  
    buf = alloca (register_size (gdbarch, regnum));
    frame_unwind_register (next_frame, regnum, buf);
!   return extract_typed_address (buf, register_type (gdbarch, regnum));
  }
  
  static void