[Bug other/38732] [4.4 Regression] Openoffice.org segfaults with runtime libs built from GCC trunk

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

------- Comment #7 from hjl dot tools at gmail dot com  2009-01-05 22:51 -------
(In reply to comment #5)
> There is padding between adjustedPtr and unwindHeader because the latter is
> forced to be maximally aligned.  Due to the additional member the padding was
> reduced.  Also, the alignment of _Unwind_Exception depends on -mavx.
> 

I don't see any need for extra alignment on _Unwind_Exception:

struct _Unwind_Exception
{
  _Unwind_Exception_Class exception_class;
  _Unwind_Exception_Cleanup_Fn exception_cleanup;
  _Unwind_Word private_1;
  _Unwind_Word private_2;

  /* @@@ The IA-64 ABI says that this structure must be double-word aligned.
     Taking that literally does not make much sense generically.  Instead we
     provide the maximum alignment required by any type for the machine.  */
} __attribute__((__aligned__));

I think it should have a fixed alignment for a given target.


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hjl dot tools at gmail dot
                   |                            |com, Joey dot ye at intel
                   |                            |dot com, xuepeng dot guo at
                   |                            |intel dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38732